Mesa, AZ Climate & Monthly Averages
The climate of Mesa
With 11.2 inches (285 mm) of annual precipitation, Mesa is one of the drier places we cover. January is the wettest month it gets, at 1.6 inches (42 mm), and the year runs between 65°F (19°C) and 106°F (41°C) by day.
Climate quick facts
- Hottest month: July - highs near 106°F (41°C)
- Coldest month: January - highs near 65°F (19°C)
- Decade extremes (2015-2024): 118°F (48°C) high · 26°F (-4°C) low
- Wettest month: January (5 rainy days) · Sunniest: June (13.1 h sun/day)
- Climate type: semi-arid
- Annual swing: 23°C between the average warmest and coolest month · day to night: 13°C
- Months averaging 30°C or hotter: 7
- Average humidity: 34%
Temperatures through the year
January bottoms out at 65°F (19°C) in daylight, 43°F (6°C) after dark. At its warmest, in July, Mesa runs to 106°F (41°C) in the afternoon and back to 84°F (29°C) by dawn. Relative humidity averages 34% across the year, drier than almost anywhere else we cover.
Rain, sun and snow
The wettest month is January (1.6 inches (42 mm) across 5 days) and the driest May. Five of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is November through March. The gridded 2015-2024 daily record for this location tops out at 118°F (48°C) and bottoms at 26°F (-4°C) - decade extremes, not all-time station records.
How Mesa compares
- Afternoons run 13°C above the following night - a bigger day-to-night gap than 97% of the 3496 cities we track.
- Rain or snow reaches the ground on 37 days a year - fewer wet days than all but 5% of the 3496 cities we track.
- Annual precipitation is 11.2 inches (285 mm) - drier than all but 7% of the 3496 cities we track.
Ranked against every city in our dataset, each measured on the same ten-year window.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 65° | 43° | 5 | 1.6 in | 8.5 h/day | 10.2 h | 17% | 54% |
| February | 70° | 46° | 4 | 1.2 in | 9.6 h/day | 10.9 h | 13% | 46% |
| March | 77° | 51° | 4 | 1.0 in | 10.6 h/day | 11.9 h | 12% | 37% |
| April | 87° | 59° | 1 | 0.2 in | 12.5 h/day | 13.0 h | 4% | 22% |
| May | 93° | 67° | 1 | 0.1 in | 12.9 h/day | 13.9 h | 3% | 19% |
| June | 105° | 78° | 1 | 0.2 in | 13.1 h/day | 14.4 h | 3% | 17% |
| July | 106° | 84° | 5 | 1.6 in | 12.1 h/day | 14.2 h | 15% | 31% |
| August | 104° | 82° | 6 | 1.4 in | 12.1 h/day | 13.4 h | 18% | 35% |
| September | 100° | 76° | 3 | 0.9 in | 11.4 h/day | 12.3 h | 9% | 32% |
| October | 89° | 64° | 2 | 0.9 in | 10.5 h/day | 11.3 h | 8% | 32% |
| November | 76° | 53° | 2 | 0.7 in | 9.4 h/day | 10.4 h | 6% | 36% |
| December | 67° | 45° | 4 | 1.3 in | 8.2 h/day | 9.9 h | 14% | 48% |
Mesa month by month
Average high and low for each month, with the bar showing where it sits in Mesa's year (left is the coldest night, right is the warmest afternoon).
January
- Rain
- 5 days
- Sunshine
- 8.5 h
- Daylight
- 10.2 h
February
- Rain
- 4 days
- Sunshine
- 9.6 h
- Daylight
- 10.9 h
March
- Rain
- 4 days
- Sunshine
- 10.6 h
- Daylight
- 11.9 h
April
- Rain
- 1 day
- Sunshine
- 12.5 h
- Daylight
- 13.0 h
May
- Rain
- 1 day
- Sunshine
- 12.9 h
- Daylight
- 13.9 h
June
- Rain
- 1 day
- Sunshine
- 13.1 h
- Daylight
- 14.4 h
July
- Rain
- 5 days
- Sunshine
- 12.1 h
- Daylight
- 14.2 h
August
- Rain
- 6 days
- Sunshine
- 12.1 h
- Daylight
- 13.4 h
September
- Rain
- 3 days
- Sunshine
- 11.4 h
- Daylight
- 12.3 h
October
- Rain
- 2 days
- Sunshine
- 10.5 h
- Daylight
- 11.3 h
November
- Rain
- 2 days
- Sunshine
- 9.4 h
- Daylight
- 10.4 h
December
- Rain
- 4 days
- Sunshine
- 8.2 h
- Daylight
- 9.9 h
Warmer places to go, by month: January · February · March · April · May · June · July · August · September · October · November · December
Seasons in Mesa
Spring (March through May)
Spring is hot here - highs near 85°F (30°C), nights near 59°F (15°C), and precipitation is sparse, near 1.4 inches (35 mm) for the season. Daylight is generous - around 12.0 hours of sun a day.
Summer (June through August)
Through summer, Mesa turns very hot: 105°F (40°C) by day, 81°F (27°C) after dark, and rain comes on about 11 days over the three months. Daylight is generous - around 12.4 hours of sun a day.
Fall (September through November)
Fall is hot here - highs near 88°F (31°C), nights near 64°F (18°C), and precipitation is sparse, near 2.6 inches (65 mm) for the season. Daylight is generous - around 10.4 hours of sun a day.
Winter (December through February)
Winter stays on the cool side of mild here - highs near 67°F (20°C), nights near 45°F (7°C), and rain comes on about 13 days over the three months.
Climate questions, answered
How many hot months does Mesa have?
Is Mesa cold in winter?
Is Mesa a wet city?
How sunny is Mesa?
Best time to visit Mesa
The best time to visit Mesa is generally November to March, when temperatures sit either side of the peak heat rather than in it. Daytime temperatures in that window sit near 71°F (22°C), with rain on about 4 days a month. For the same question asked the other way round, see where else is warm in November.
Pack for Mesa with lightweight, breathable clothing and serious sun protection. July nights average 84°F (29°C), so evenings rarely match the afternoons.
Mesa temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need the precipitation in other units? The mm-to-inches rainfall converter handles it.