Climate in Tucson, United States

Tucson, United States has a desert climate. The annual average temperature is about 23°C, with around 3634 hours of sunshine; the national rainfall baseline is roughly 121 mm across 11 rainy days a year. The warmest month is Jul (highs near 37.3°C) and the coldest is Jan (lows near 8.8°C). These are deterministic planning estimates, not a forecast or measured station data. Temperature and sunshine follow the city's latitude; rainfall and the climate zone come from a country-level baseline that every city in the country shares (refined by region in the United States, Canada and Australia), so they do not show local differences. Check current conditions with an official meteorological service before travel.

Data year 2025; last updated 2026-05-16.

Tucson is classified as Desert. The classification combines the city’s own temperature range, which follows its latitude, with a rainfall pattern taken at country level for United States — so cities in the same country usually share a zone.

The rainfall baseline for United States is about 121 mm a year over roughly 11 rainy days, with the wettest month Jan and the driest Jul. This figure is not specific to Tucson: every city in United States carries the same baseline, so it will not show the difference between, say, a dry inland city and a wet coastal one. Use an official meteorological service for local rainfall.

Tucson sees an estimated 3634 hours of sunshine a year, concentrated in the warmer months around Jul.

By temperature and rainfall, the most comfortable months in Tucson are Jan, Feb, Dec. Conditions vary year to year — verify with a current forecast before booking.

Tucson has a climate comfort score of 57/100, a moderate year-round climate by this measure. The score weights mild temperatures most, then rainfall balance, sunshine, low seasonality, and the absence of extreme winter cold or summer heat.