JA Tool

WeatherDiff: Compare Weather APIs

Same location, different forecasts. Compare sources and spot differences (no storage).

What it does

Shows side-by-side forecasts for the same location from multiple sources (e.g., Open-Meteo / MET Norway)
Helps you spot differences in key items (temperature, precipitation, wind, etc.)
Provides quick links to other services for deeper verification

Open the tool 日本語ガイド

Use this when

Different weather sites disagree and you want a quick “how far apart are they?” view
You want to double-check rain/wind/temp with multiple sources
You need a fast pre-check for travel, laundry, or events

Keywords: weather API comparison, forecast differences, forecast discrepancy

How to use

Enter a location (or use your current location)
Run Compare to load forecasts from each source
Read the diff / discrepancy section

Runs locally in your browser. No server-side storage.

Notes (limits)

This is reference info. For critical decisions, verify with official sources.
Forecasts are inherently uncertain; differences do not mean one source is always correct.
External links and their content are outside the tool’s control.