Weather — entry 026 of 31

US Weather

Verified Jul 2026

The National Weather Service API serves official US government forecasts, active alerts, and observation-station data as GeoJSON and JSON-LD feeds, with no signup or API key required. It's widely used by third-party weather apps and accepts direct browser calls, though it requires a descriptive User-Agent header identifying your application on every request.

forecastalertsgovernmentobservationsgeojson

Visit weather.gov ↗Read the docs ↗More Weather

AuthenticationNone requiredCall it straight away — no key, no signup.

HTTPSSupportedTraffic is encrypted in transit.

CORSEnabledCallable directly from browser JavaScript.

PricingFreeNo paid tier — free for the documented use case.

FormatsGeoJSON, JSON-LD, CAP/XML, DWML/XML, ATOMResponses can be requested as GeoJSON or JSON-LD or CAP/XML or DWML/XML or ATOM.

GreatAPIs Score

Score100out of 100

Authentication25/25No authentication required

Pricing20/20Free to use

Docs20/20Machine-readable spec file bundled

Formats15/15Supports 5 response formats

Freshness20/20Verified within 6 months

Embed this badge

<a href="https://greatapis.com/api/us-weather/"><img src="https://greatapis.com/badge/us-weather.svg" alt="Scored 100 on greatapis.com"></a>

Auth quickstart

No key needed — call it now.

Stored keyNo key stored

Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.

Endpoints

Servers

https://api.weather.gov

Auth

userAgentapiKeyAuth

alerts8

GET/alerts

Parameters

Name	In	Required	Type
`active`	query	no	boolean
`start`	query	no	string
`end`	query	no	string
`status`	query	no	array
`message_type`	query	no	array
`event`	query	no	array
`code`	query	no	array
`area`	query	no	array
`point`	query	no	—
`region`	query	no	array
`region_type`	query	no	string
`zone`	query	no	array
`urgency`	query	no	array
`severity`	query	no	array
`certainty`	query	no	array
`limit`	query	no	integer
`cursor`	query	no	string

Responses

Status	Description	Schema
`200`	—	—
`301`	Certain common queries may be redirected to discrete URLs	—
`default`	—	—

GET/alerts/active

Parameters

Name	In	Required	Type
`status`	query	no	array
`message_type`	query	no	array
`event`	query	no	array
`code`	query	no	array
`area`	query	no	array
`point`	query	no	—
`region`	query	no	array
`region_type`	query	no	string
`zone`	query	no	array
`urgency`	query	no	array
`severity`	query	no	array
`certainty`	query	no	array

Responses

Status	Description	Schema
`200`	—	—
`301`	Certain common queries may be redirected to discrete URLs	—
`default`	—	—

GET/alerts/active/area/{area}

Parameters

Name	In	Required	Type
`area`	path	yes	—

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

GET/alerts/active/count

Responses

Status	Description	Schema
`200`	A data structure showing the counts of active alerts broken down by various categories	—
`default`	—	—

GET/alerts/active/region/{region}

Parameters

Name	In	Required	Type
`region`	path	yes	—

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

GET/alerts/active/zone/{zoneId}

Parameters

Name	In	Required	Type
`zoneId`	path	yes	—

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

GET/alerts/types

Responses

Status	Description	Schema
`200`	A list of recognized event types	—
`default`	—	—

GET/alerts/{id}

Parameters

Name	In	Required	Type
`id`	path	yes	—

Responses

Status	Description	Schema
`200`	An alert record	`AlertGeoJson`
`default`	—	—

aviation7

GET/aviation/cwsus/{cwsuId}

Parameters

Name	In	Required	Type
`cwsuId`	path	yes	—

Responses

Status	Description	Schema
`200`	success	`CenterWeatherServiceUnitJsonLd`
`default`	—	—

GET/aviation/cwsus/{cwsuId}/cwas

Parameters

Name	In	Required	Type
`cwsuId`	path	yes	—

Responses

Status	Description	Schema
`200`	success	`CenterWeatherAdvisoryCollectionGeoJson`
`default`	—	—

GET/aviation/cwsus/{cwsuId}/cwas/{date}/{sequence}

Parameters

Name	In	Required	Type
`cwsuId`	path	yes	—
`date`	path	yes	—
`sequence`	path	yes	integer

Responses

Status	Description	Schema
`200`	success	`CenterWeatherAdvisoryGeoJson`
`default`	—	—

GET/aviation/sigmets

Parameters

Name	In	Required	Type
`start`	query	no	string
`end`	query	no	string
`date`	query	no	—
`atsu`	query	no	—
`sequence`	query	no	—

Responses

Status	Description	Schema
`200`	success	`SigmetCollectionGeoJson`
`default`	—	—

GET/aviation/sigmets/{atsu}

Parameters

Name	In	Required	Type
`atsu`	path	yes	—

Responses

Status	Description	Schema
`200`	success	`SigmetCollectionGeoJson`
`default`	—	—

GET/aviation/sigmets/{atsu}/{date}

Parameters

Name	In	Required	Type
`atsu`	path	yes	—
`date`	path	yes	—

Responses

Status	Description	Schema
`200`	success	`SigmetCollectionGeoJson`
`default`	—	—

GET/aviation/sigmets/{atsu}/{date}/{time}

Parameters

Name	In	Required	Type
`atsu`	path	yes	—
`date`	path	yes	—
`time`	path	yes	—

Responses

Status	Description	Schema
`200`	success	`SigmetGeoJson`
`default`	—	—

glossary1

GET/glossary

Responses

Status	Description	Schema
`200`	A set of glossary terms	—
`default`	—	—

gridpoints4

GET/gridpoints/{wfo}/{x},{y}

Parameters

Name	In	Required	Type
`wfo`	path	yes	—
`x`	path	yes	integer
`y`	path	yes	integer

Responses

Status	Description	Schema
`200`	Gridpoint forecast data	`GridpointGeoJson`
`default`	—	—

GET/gridpoints/{wfo}/{x},{y}/forecast

Parameters

Name	In	Required	Type
`wfo`	path	yes	—
`x`	path	yes	integer
`y`	path	yes	integer
`Feature-Flags`	header	no	array
`units`	query	no	—

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

GET/gridpoints/{wfo}/{x},{y}/forecast/hourly

Parameters

Name	In	Required	Type
`wfo`	path	yes	—
`x`	path	yes	integer
`y`	path	yes	integer
`Feature-Flags`	header	no	array
`units`	query	no	—

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

GET/gridpoints/{wfo}/{x},{y}/stations

Parameters

Name	In	Required	Type
`wfo`	path	yes	—
`x`	path	yes	integer
`y`	path	yes	integer
`limit`	query	no	integer

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

icons3

GET/icons

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

GET/icons/{set}/{timeOfDay}/{first}

Parameters

Name	In	Required	Type
`set`	path	yes	string
`timeOfDay`	path	yes	string
`first`	path	yes	string
`size`	query	no	—
`fontsize`	query	no	integer

Responses

Status	Description	Schema
`200`	success	`BinaryFile`
`default`	—	—

GET/icons/{set}/{timeOfDay}/{first}/{second}

Parameters

Name	In	Required	Type
`set`	path	yes	string
`timeOfDay`	path	yes	string
`first`	path	yes	string
`second`	path	yes	string
`size`	query	no	—
`fontsize`	query	no	integer

Responses

Status	Description	Schema
`200`	success	`BinaryFile`
`default`	—	—

offices8

GET/offices/{officeId}

Parameters

Name	In	Required	Type
`officeId`	path	yes	—

Responses

Status	Description	Schema
`200`	success	`Office`
`default`	—	—

GET/offices/{officeId}/briefing

Parameters

Name	In	Required	Type
`officeId`	path	yes	—

Responses

Status	Description	Schema
`200`	success	`OfficeBriefing`
`default`	—	—

GET/offices/{officeId}/briefing/download/latest

Parameters

Name	In	Required	Type
`officeId`	path	yes	—

Responses

Status	Description	Schema
`302`	success	—
`default`	—	—

GET/offices/{officeId}/briefing/download/{briefingId}

Parameters

Name	In	Required	Type
`officeId`	path	yes	—
`briefingId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	`BinaryFile`
`default`	—	—

GET/offices/{officeId}/headlines

Parameters

Name	In	Required	Type
`officeId`	path	yes	—

Responses

Status	Description	Schema
`200`	success	`OfficeHeadlineCollection`
`default`	—	—

GET/offices/{officeId}/headlines/{headlineId}

Parameters

Name	In	Required	Type
`officeId`	path	yes	—
`headlineId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	`OfficeHeadline`
`default`	—	—

GET/offices/{officeId}/weatherstories

Parameters

Name	In	Required	Type
`officeId`	path	yes	—

Responses

Status	Description	Schema
`200`	success	`OfficeWeatherStoryCollection`
`default`	—	—

GET/offices/{officeId}/weatherstories/download/{imageId}

Parameters

Name	In	Required	Type
`officeId`	path	yes	—
`imageId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	`BinaryFile`
`default`	—	—

points3

GET/points/{latitude},{longitude}

Parameters

Name	In	Required	Type
`latitude`	path	yes	number
`longitude`	path	yes	number

Responses

Status	Description	Schema
`200`	success	`PointGeoJson`
`default`	—	—

GET/points/{latitude},{longitude}/radio

Parameters

Name	In	Required	Type
`latitude`	path	yes	number
`longitude`	path	yes	number

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

GET/points/{latitude},{longitude}/stations

Parameters

Name	In	Required	Type
`latitude`	path	yes	number
`longitude`	path	yes	number

Responses

Status	Description	Schema
`301`	redirect to gridpoint stations	—
`default`	—	—

products9

GET/products

Parameters

Name	In	Required	Type
`location`	query	no	array
`start`	query	no	string
`end`	query	no	string
`office`	query	no	array
`wmoid`	query	no	array
`type`	query	no	array
`limit`	query	no	integer

Responses

Status	Description	Schema
`200`	success	`TextProductCollection`
`default`	—	—

GET/products/locations

Responses

Status	Description	Schema
`200`	success	`TextProductLocationCollection`
`default`	—	—

GET/products/locations/{locationId}/types

Parameters

Name	In	Required	Type
`locationId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	`TextProductTypeCollection`
`default`	—	—

GET/products/types

Responses

Status	Description	Schema
`200`	success	`TextProductTypeCollection`
`default`	—	—

GET/products/types/{typeId}

Parameters

Name	In	Required	Type
`typeId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	`TextProductCollection`
`default`	—	—

GET/products/types/{typeId}/locations

Parameters

Name	In	Required	Type
`typeId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	`TextProductLocationCollection`
`default`	—	—

GET/products/types/{typeId}/locations/{locationId}

Parameters

Name	In	Required	Type
`typeId`	path	yes	string
`locationId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	`TextProductCollection`
`default`	—	—

GET/products/types/{typeId}/locations/{locationId}/latest

Parameters

Name	In	Required	Type
`typeId`	path	yes	string
`locationId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	`TextProduct`
`default`	—	—

GET/products/{productId}

Parameters

Name	In	Required	Type
`productId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	`TextProduct`
`default`	—	—

radar8

GET/radar/profilers/{stationId}

Parameters

Name	In	Required	Type
`stationId`	path	yes	string
`time`	query	no	—
`interval`	query	no	—

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

GET/radar/queues/{host}

Parameters

Name	In	Required	Type
`host`	path	yes	string
`limit`	query	no	integer
`arrived`	query	no	—
`created`	query	no	—
`published`	query	no	—
`station`	query	no	string
`type`	query	no	string
`feed`	query	no	string
`resolution`	query	no	integer

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

GET/radar/servers

Parameters

Name	In	Required	Type
`reportingHost`	query	no	string

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

GET/radar/servers/{id}

Parameters

Name	In	Required	Type
`id`	path	yes	string
`reportingHost`	query	no	string

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

GET/radar/spgds

Parameters

Name	In	Required	Type
`published`	query	no	—

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

GET/radar/stations

Parameters

Name	In	Required	Type
`stationType`	query	no	array
`reportingHost`	query	no	string
`host`	query	no	string

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

GET/radar/stations/{stationId}

Parameters

Name	In	Required	Type
`stationId`	path	yes	string
`reportingHost`	query	no	string
`host`	query	no	string

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

GET/radar/stations/{stationId}/alarms

Parameters

Name	In	Required	Type
`stationId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

radio1

GET/radio/{callSign}/broadcast

Parameters

Name	In	Required	Type
`callSign`	path	yes	string

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

stations7

GET/stations

Parameters

Name	In	Required	Type
`id`	query	no	array
`state`	query	no	array
`limit`	query	no	integer
`cursor`	query	no	string

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

GET/stations/{stationId}

Parameters

Name	In	Required	Type
`stationId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	`ObservationStationGeoJson`
`default`	—	—

GET/stations/{stationId}/observations

Parameters

Name	In	Required	Type
`stationId`	path	yes	string
`start`	query	no	string
`end`	query	no	string
`cursor`	query	no	string
`limit`	query	no	integer

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

GET/stations/{stationId}/observations/latest

Parameters

Name	In	Required	Type
`stationId`	path	yes	string
`require_qc`	query	no	boolean

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

GET/stations/{stationId}/observations/{time}

Parameters

Name	In	Required	Type
`stationId`	path	yes	string
`time`	path	yes	string

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

GET/stations/{stationId}/tafs

Parameters

Name	In	Required	Type
`stationId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

GET/stations/{stationId}/tafs/{date}/{time}

Parameters

Name	In	Required	Type
`stationId`	path	yes	string
`date`	path	yes	—
`time`	path	yes	—

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

thumbnails1

GET/thumbnails/satellite/{area}

Parameters

Name	In	Required	Type
`area`	path	yes	string

Responses

Status	Description	Schema
`200`	An image file	`BinaryFile`
`default`	—	—

zones6

GET/zones

Parameters

Name	In	Required	Type
`id`	query	no	array
`area`	query	no	array
`region`	query	no	array
`type`	query	no	array
`point`	query	no	—
`include_geometry`	query	no	boolean
`limit`	query	no	integer
`effective`	query	no	string

Responses

Status	Description	Schema
`200`	success	`ZoneCollectionGeoJson`
`default`	—	—

GET/zones/forecast/{zoneId}/observations

Parameters

Name	In	Required	Type
`zoneId`	path	yes	—
`start`	query	no	string
`end`	query	no	string
`limit`	query	no	integer

Responses

Status	Description	Schema
`200`	success	`ObservationCollectionGeoJson`
`default`	—	—

GET/zones/forecast/{zoneId}/stations

Parameters

Name	In	Required	Type
`zoneId`	path	yes	—
`limit`	query	no	integer
`cursor`	query	no	string

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

GET/zones/{type}

Parameters

Name	In	Required	Type
`type`	path	yes	—
`id`	query	no	array
`area`	query	no	array
`region`	query	no	array
`type`	query	no	array
`point`	query	no	—
`include_geometry`	query	no	boolean
`limit`	query	no	integer
`effective`	query	no	string

Responses

Status	Description	Schema
`200`	success	`ZoneCollectionGeoJson`
`default`	—	—

GET/zones/{type}/{zoneId}

Parameters

Name	In	Required	Type
`type`	path	yes	—
`zoneId`	path	yes	—
`effective`	query	no	string

Responses

Status	Description	Schema
`200`	success	`ZoneGeoJson`
`default`	—	—

GET/zones/{type}/{zoneId}/forecast

Parameters

Name	In	Required	Type
`type`	path	yes	string
`zoneId`	path	yes	—

Responses

Status	Description	Schema
`200`	success	`ZoneForecastGeoJson`
`default`	—	—

Try it

Operation

API key

Developer reference

Base URLhttps://api.weather.gov

Rate limit

No fixed public rate limit is published; exceeding an undisclosed threshold returns an error, typically clearing within ~5 seconds. Every request must include a descriptive User-Agent header identifying the app (e.g. contact info) — direct client requests are rarely throttled, but requests routed through shared proxies are far more likely to hit the limit.

Key endpoints

GET/points/{latitude},{longitude}
GET/gridpoints/{wfo}/{x},{y}/forecast
GET/gridpoints/{wfo}/{x},{y}/forecast/hourly
GET/alerts/active
GET/stations/{stationId}/observations/latest

Availability

Uptime100%

Median latency294 ms

Last checkUp · 200 · Sep 2026

17 checks since Aug 2026. A person runs this check by hand, not an automated monitor.

Changelog

Spec version3.11.0

Tracked paths69

No change recorded yet.

Tracking since Sep 2026. See every tracked change ↗ ·Subscribe with RSS ↗

Featured in

5 collections

Build a weather app GeoJSON-native data Spec-backed APIs No key required CORS-ready browser APIs

GreatAPIs Score

Embed this badge

Auth quickstart

Endpoints

Try it

Developer reference

Availability

Changelog

Featured in

People comparing US Weather also look at…

US Weather vs Hong Kong Observatory

US Weather vs openSenseMap

US Weather vs wttr.in

US Weather vs AviationWeather

US Weather vs Open-Meteo

US Weather vs RainViewer

Aemet

IPMA

7Timer!

AQICN

ColorfulClouds

Meteorologisk Institutt