Climate averages 1991–2020
Mesa weather
in May.
A hot, very dry month: the 5th warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Mesa: daytime highs average 33.9°C and nights cool to about 17.7°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 4.3 mm of rain on fewer than one day, which makes May a very dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 52 min on an average May day.
The nearest other city in this atlas is Tempe (8 km away). In May its highs average 34.1°C, about as warm as Mesa, with 4.1 mm of rain.
Among the 498 cities listed in the United States, Mesa ranks 8th of 498 for the warmest May highs and 19th of 498 for the driest May (rainfall, lowest first). The mean May high of those 498 cities is 23.8°C; Mesa is 10.1°C warmer than that mean.
From May to June, average highs rise by 5.5°C to 39.4°C, and monthly rainfall falls from 4.3 mm to 1.6 mm.
The annual picture
May 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
Mesa climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 18.5°C4.3°C | 4.3°C | 40 | 3.9 | 10.210 h |
| February | 20.2°C5.8°C | 5.8°C | 44 | 4.5 | 11.011 h |
| March | 24.3°C8.6°C | 8.6°C | 29 | 3.2 | 12.012 h |
| April | 28.8°C12.5°C | 12.5°C | 9.4 | 1.4 | 13.013 h |
| May, selected | 33.9°C17.7°C | 17.7°C | 4.3 | 0.8 | 13.914 h |
| June | 39.4°C23.1°C | 23.1°C | 1.6 | 0.4 | 14.314 h |
| July | 40.3°C27.3°C | 27.3°C | 18 | 3.2 | 14.114 h |
| August | 39.3°C26.9°C | 26.9°C | 25 | 4.0 | 13.413 h |
| September | 36.6°C22.8°C | 22.8°C | 26 | 3.0 | 12.412 h |
| October | 30.6°C15.6°C | 15.6°C | 20 | 2.2 | 11.411 h |
| November | 23.7°C9.0°C | 9.0°C | 20 | 2.4 | 10.510 h |
| December | 17.8°C4.2°C | 4.2°C | 33 | 4.1 | 10.010 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
May in nearby cities
- Tempe in MayUnited States · 8 kmHigh 34.1°C · Low 18.3°C · 4.1 mm rain
- Scottsdale in MayUnited States · 12 kmHigh 33.8°C · Low 18.2°C · 4.1 mm rain
- Chandler in MayUnited States · 13 kmHigh 34.3°C · Low 17.8°C · 3.5 mm rain
- Phoenix in MayUnited States · 24 kmHigh 34.2°C · Low 18.8°C · 4.1 mm rain
- Glendale (Arizona), United States in MayUnited States · 36 kmHigh 34.0°C · Low 19.0°C · 3.3 mm rain
- San Tan Valley in MayUnited States · 38 kmHigh 33.2°C · Low 17.4°C · 4.1 mm rain
- Peoria (Arizona), United States in MayUnited States · 42 kmHigh 33.7°C · Low 18.9°C · 3.3 mm rain
- Avondale in MayUnited States · 49 kmHigh 34.5°C · Low 19.6°C · 3.3 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 Mesa) is explained once on the Mesa year overview and on the Sources, method and limits page.