When OpenWeather fits
An application combining current weather, forecast intervals and alerts through a documented product family.
Check before integrating
One Call and other forecast endpoints are different products. Check the version, subscription and included fields instead of assuming one key unlocks everything.
Provider endpoint reference
This is OpenWeather's documented interface. Its credentials and response format are separate from an All Them APIs account.
GET https://api.openweathermap.org/data/3.0/onecall
Authentication: API key in appid
Inputs: lat, lon, appid; optional units and exclude
Output: JSON with current, hourly, daily and alert sections according to the request and product access.| Capability | What to expect |
|---|---|
| Forecast interface | One Call current/hourly/daily bundles |
| Historical workflow | Separate historical products and One Call time-machine access |
| Location input | Latitude and longitude for One Call |
| Response shape | Nested current, hourly and daily objects |
| Production access | Select the product and plan explicitly |
| Cost driver | API product and call allowance |
Pricing model and production access
Product-specific subscriptions and usage allowances. Compare the allowance for the exact API product; a free current-weather allowance is not the price of One Call history.
For 10,000 location-day lookups, record the requested variables and hourly/daily resolution first. A plan counting calls and a plan counting returned weather records can charge different amounts for the same HTTP request count.
Migration notes
Map numeric weather condition codes and units explicitly. Do not replace a daily forecast endpoint with One Call without checking the hourly window and entitlement.
Keep provider-specific authentication and response mapping inside an adapter. Preserve source timestamps and identifiers so changing a provider does not silently change the meaning of stored records.
OpenWeather alternatives
| Alternative | When to evaluate it |
|---|---|
| OpenWeather vs WeatherAPI.com | An app accepting city names, postal codes or coordinates and needing a compact location-and-forecast response. |
| OpenWeather vs Open-Meteo | A team choosing explicit weather variables or comparing model output rather than consuming a fixed weather-card payload. |
| OpenWeather vs Tomorrow.io | A workflow connecting weather fields to operating decisions, where the required fields and forecast intervals can be specified in advance. |
| OpenWeather vs Visual Crossing | Historical weather joins, reporting and backfills that benefit from a consistent date-range interface. |
| OpenWeather vs Weatherbit | An integration with a fixed daily forecast schema that may later need air-quality, agriculture or energy data. |
A fair evaluation
- Fix ten coordinates across your actual service area. Use the same UTC issue time, units and hourly window for every provider.
- Save the forecast before the event. Compare later against an agreed observation source; a successful HTTP response does not establish forecast accuracy.
- Check missing values, elevation, timezone boundaries and precipitation accumulation periods before calculating an error statistic.
- Measure p50/p95 request latency, throttling and billed units separately from forecast error. Repeat across several weather conditions.
- Confirm caching, attribution, redistribution and commercial-use terms for the exact plan. A keyless endpoint is not automatically a commercial entitlement.
A common integration contract
POST /api/v1/weather/forecastReview the request contract and tell us the coverage you need. Access requires enablement; this endpoint does not execute or bill requests yet.
View endpoint and request accessSources and review dates
Documentation reviewed October 28, 2026. These are integration and plan comparisons, not measured speed or accuracy rankings. Availability, licensing and prices should be confirmed for the chosen plan.
Corrections: email faizank@docsalot.dev with an official source.