Climate averages 1991–2020
Tucson weather
in July.
A very hot, fairly dry month: the 2nd warmest and one of the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a very hot month in Tucson: daytime highs average 36.8°C and nights cool to about 25.1°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 33 mm of rain on roughly 8 days, which makes July a fairly dry month (one of the wettest months of the year). Daylight, from sunrise to sunset, lasts about 14 h 02 min on an average July day.
The nearest other city in this atlas is Nogales (102 km away). In July its highs average 32.6°C, 4.2°C cooler than Tucson, with 94 mm of rain.
Among the 498 cities listed in the United States, Tucson ranks joint 20th of 498 for the warmest July highs and joint 162nd of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Tucson is 6.5°C warmer than that mean.
From July to August, average highs fall by 0.8°C to 36.0°C, and monthly rainfall stays at 33 mm.
The annual picture
July in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Tucson climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 17.6°C4.0°C | 4.0°C | 29 | 4.0 | 10.310 h |
| February | 19.3°C5.4°C | 5.4°C | 28 | 3.8 | 11.011 h |
| March | 23.3°C8.5°C | 8.5°C | 17 | 3.0 | 12.012 h |
| April | 27.6°C12.3°C | 12.3°C | 6.0 | 1.4 | 12.913 h |
| May | 32.4°C17.2°C | 17.2°C | 2.7 | 0.8 | 13.814 h |
| June | 37.5°C22.6°C | 22.6°C | 4.6 | 1.2 | 14.214 h |
| July, selected | 36.8°C25.1°C | 25.1°C | 33 | 7.8 | 14.014 h |
| August | 36.0°C24.4°C | 24.4°C | 33 | 7.5 | 13.313 h |
| September | 34.1°C21.3°C | 21.3°C | 25 | 3.7 | 12.412 h |
| October | 29.2°C14.9°C | 14.9°C | 14 | 2.3 | 11.411 h |
| November | 22.6°C8.5°C | 8.5°C | 17 | 2.5 | 10.511 h |
| December | 17.1°C3.8°C | 3.8°C | 31 | 4.3 | 10.110 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Nogales in JulyMexico · 102 kmHigh 32.6°C · Low 20.4°C · 94 mm rain
- San Tan Valley in JulyUnited States · 122 kmHigh 39.3°C · Low 26.5°C · 21 mm rain
- Chandler in JulyUnited States · 148 kmHigh 40.7°C · Low 27.2°C · 19 mm rain
- Mesa in JulyUnited States · 158 kmHigh 40.3°C · Low 27.3°C · 18 mm rain
- Tempe in JulyUnited States · 161 kmHigh 40.5°C · Low 27.8°C · 19 mm rain
- Agua Prieta in JulyMexico · 165 kmHigh 33.8°C · Low 21.5°C · 50 mm rain
- Scottsdale in JulyUnited States · 170 kmHigh 40.3°C · Low 27.7°C · 19 mm rain
- Phoenix in JulyUnited States · 173 kmHigh 40.6°C · Low 27.9°C · 19 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Tucson) is explained once on the Tucson year overview and on the Sources, method and limits page.