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 | Humidity |
|---|---|---|---|---|---|---|
| January | 65° | 43° | 5 | 1.6 in | 8.5 h/day | 54% |
| February | 70° | 46° | 4 | 1.2 in | 9.6 h/day | 46% |
| March | 77° | 51° | 4 | 1.0 in | 10.6 h/day | 37% |
| April | 87° | 59° | 1 | 0.2 in | 12.5 h/day | 22% |
| May | 93° | 67° | 1 | 0.1 in | 12.9 h/day | 19% |
| June | 105° | 78° | 1 | 0.2 in | 13.1 h/day | 17% |
| July | 106° | 84° | 5 | 1.6 in | 12.1 h/day | 31% |
| August | 104° | 82° | 6 | 1.4 in | 12.1 h/day | 35% |
| September | 100° | 76° | 3 | 0.9 in | 11.4 h/day | 32% |
| October | 89° | 64° | 2 | 0.9 in | 10.5 h/day | 32% |
| November | 76° | 53° | 2 | 0.7 in | 9.4 h/day | 36% |
| December | 67° | 45° | 4 | 1.3 in | 8.2 h/day | 48% |
Mesa month by month
Mesa weather in January
January brings highs around 65°F (19°C), lows near 43°F (6°C), about 5 wet days - typically the coldest month and the wettest month of the year in Mesa.
Mesa weather in February
February brings highs around 70°F (21°C), lows near 46°F (8°C), about 4 wet days.
Mesa weather in March
March brings highs around 77°F (25°C), lows near 51°F (11°C), about 4 wet days.
Mesa weather in April
April brings highs around 87°F (30°C), lows near 59°F (15°C), about 1 wet days.
Mesa weather in May
May brings highs around 93°F (34°C), lows near 67°F (19°C), about 1 wet days - typically the driest month of the year in Mesa.
Mesa weather in June
June brings highs around 105°F (40°C), lows near 78°F (26°C), about 1 wet days - typically the sunniest month of the year in Mesa.
Mesa weather in July
July brings highs around 106°F (41°C), lows near 84°F (29°C), about 5 wet days - typically the hottest month of the year in Mesa.
Mesa weather in August
August brings highs around 104°F (40°C), lows near 82°F (28°C), about 6 wet days.
Mesa weather in September
September brings highs around 100°F (38°C), lows near 76°F (25°C), about 3 wet days.
Mesa weather in October
October brings highs around 89°F (32°C), lows near 64°F (18°C), about 2 wet days.
Mesa weather in November
November brings highs around 76°F (25°C), lows near 53°F (11°C), about 2 wet days.
Mesa weather in December
December brings highs around 67°F (19°C), lows near 45°F (7°C), about 4 wet days.
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.