Climate averages 1991–2020
Flagstaff weather
in July.
A warm, wet month: the warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a warm month in Flagstaff: daytime highs average 27.9°C and nights cool to about 15.9°C. By daytime temperature it is the warmest month of the year.
Expect about 115 mm of rain on roughly 15 days, which makes July a wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 17 min on an average July day.
The nearest other city in this atlas is Surprise (185 km away). In July its highs average 40.4°C, 12.5°C warmer than Flagstaff, with 17 mm of rain.
Among the 498 cities listed in the United States, Flagstaff ranks joint 363rd of 498 for the warmest July highs and joint 448th of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Flagstaff is 2.4°C cooler than that mean.
From July to August, average highs fall by 1.7°C to 26.2°C, and monthly rainfall rises from 115 mm to 126 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
Flagstaff climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.7°C-3.8°C | -3.8°C | 47 | 6.3 | 10.110 h |
| February | 7.0°C-3.0°C | -3.0°C | 50 | 6.9 | 10.911 h |
| March | 10.7°C-0.3°C | -0.3°C | 49 | 7.3 | 11.912 h |
| April | 15.0°C2.8°C | 2.8°C | 31 | 5.6 | 13.113 h |
| May | 20.5°C7.7°C | 7.7°C | 32 | 5.7 | 14.014 h |
| June | 26.8°C13.2°C | 13.2°C | 11 | 3.0 | 14.514 h |
| July, selected | 27.9°C15.9°C | 15.9°C | 115 | 14.7 | 14.314 h |
| August | 26.2°C15.2°C | 15.2°C | 126 | 16.3 | 13.513 h |
| September | 23.3°C12.4°C | 12.4°C | 57 | 8.8 | 12.412 h |
| October | 17.7°C6.9°C | 6.9°C | 33 | 5.2 | 11.311 h |
| November | 11.2°C1.0°C | 1.0°C | 32 | 4.1 | 10.410 h |
| December | 5.7°C-3.6°C | -3.6°C | 41 | 5.8 | 9.810 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
- Surprise in JulyUnited States · 185 kmHigh 40.4°C · Low 28.1°C · 17 mm rain
- Peoria (Arizona), United States in JulyUnited States · 188 kmHigh 40.4°C · Low 28.0°C · 18 mm rain
- Scottsdale in JulyUnited States · 189 kmHigh 40.3°C · Low 27.7°C · 19 mm rain
- Glendale (Arizona), United States in JulyUnited States · 191 kmHigh 40.6°C · Low 28.1°C · 18 mm rain
- Mesa in JulyUnited States · 198 kmHigh 40.3°C · Low 27.3°C · 18 mm rain
- Phoenix in JulyUnited States · 198 kmHigh 40.6°C · Low 27.9°C · 19 mm rain
- Tempe in JulyUnited States · 200 kmHigh 40.5°C · Low 27.8°C · 19 mm rain
- Avondale in JulyUnited States · 206 kmHigh 41.1°C · Low 28.3°C · 18 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 Flagstaff) is explained once on the Flagstaff year overview and on the Sources, method and limits page.