What data source does this tool use?

Yearly temperature and precipitation summaries are calculated from Open-Meteo Historical Weather API data and cached on the server.

Does the same query spend API quota again?

No. Once a location-year combination is fetched, the stored result is reused for future queries.

Which years are supported?

Temperature history can be queried from 1940 to the last completed year. A single query is limited to a practical year range.

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Open-Meteo

Temperature History Comparison

Compare yearly average temperature, highs, lows, hot days and precipitation for cities using Open-Meteo historical weather data.

Location and year range

Choose a location and optionally compare it with another one. Results are shown as yearly averages.

LocationCompare with

Start yearEnd year

Yearly comparison

Result will appear here

After the query, yearly temperature or air quality trends and location comparison are shown.

Guide

Temperature History Comparison guide

Temperature History Comparison helps you see how selected cities changed across years with practical annual climate summaries.

How it works

The tool turns daily historical weather data into yearly values: average temperature, yearly high and low, hot days above 30°C and total precipitation.

How to read the result

Use multi-year ranges instead of one isolated year. Hot-day counts often make warming trends more visible than a small change in annual average temperature.

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