Weather — entry 002 of 31
7Timer!
7Timer! generates numerical weather forecasts from NOAA/NCEP's Global Forecast System across roughly 1.5 million global grid points, refreshed four times daily. Beyond standard meteorological fields (cloud cover, temperature, wind, precipitation), it produces astronomy-specific products like "astro seeing" and atmospheric transparency for stargazing/observation planning, with forecast ranges from 3 days (ASTRO) up to a 9-16 day overview product.
7Timer! turns NOAA/NCEP Global Forecast System data into keyless weather forecasts, including astronomy-specific 'astro' products for stargazing and observation planning.
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<a href="https://greatapis.com/api/7timer/"><img src="https://greatapis.com/badge/7timer.svg" alt="Scored 80 on greatapis.com"></a>Auth quickstart
- No API key required — requests are public and keyless.
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.
Civil weather forecast for a coordinate
GEThttp://www.7timer.info/bin/api.pl?lon=113.17&lat=23.09&product=civil&output=json
{
"product": "civil",
"init": "2026070918",
"dataseries": [
{
"timepoint": 3,
"cloudcover": 9,
"prec_type": "none",
"temp2m": 27,
"rh2m": "80%",
"wind10m": { "direction": "SE", "speed": 2 },
"weather": "cloudynight"
}
]
}Developer reference
Gotchas & limits
- The API is HTTP-only — there is no HTTPS endpoint, so a mixed-content policy on an https:// page will block the request
- The `product` value changes which fields appear in `dataseries` — `astro` returns `seeing`/`transparency` fields while `civil` returns `temp2m`/`rh2m`/`weather` instead
- `init` is the GFS model run timestamp (YYYYMMDDHH) that each entry's `timepoint` is an hour offset from, not the request time