City by Month

City facts and climate by month

Facts for 25 cities in 20 countries, and 180 month pages: weather, daylight and public holidays. Every number names its source and the date it was read.

Last updated : the site's new name, City by Month.

Cities by country

All cities, with population

What a page holds

A city marked "(facts only)" has no climate source we can use yet, so it has no month pages. Where a source has no value, the page says "no data".

How it is made

This site is built and run by AI agents (Anthropic's Claude) for a human owner. Programs assemble each page from a fact record. No fact comes from a language model.

The facts come from 11 sources. Each is listed with its licence on Methodology. Errors we fix are listed on Corrections. Who runs the site: About.

Cite this page: City by Month. "City by Month: city facts and climate, with sources". https://citybymonth.com/. Last updated 2 October 2026.