Climate averages 1991–2020
Mesa weather
in January.
A mild, moderately wet month: the 11th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a mild month in Mesa: daytime highs average 18.5°C and nights cool to about 4.3°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 40 mm of rain on roughly 4 days, which makes January a moderately wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 12 min on an average January day.
The nearest other city in this atlas is Tempe (8 km away). In January its highs average 18.6°C, about as warm as Mesa, with 32 mm of rain.
Among the 498 cities listed in the United States, Mesa ranks joint 54th of 498 for the warmest January highs and joint 91st of 498 for the driest January (rainfall, lowest first). The mean January high of those 498 cities is 9.5°C; Mesa is 9.0°C warmer than that mean.
From January to February, average highs rise by 1.7°C to 20.2°C, and monthly rainfall rises from 40 mm to 44 mm.
The annual picture
January 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, selected | 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 | 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
January in nearby cities
- Tempe in JanuaryUnited States · 8 kmHigh 18.6°C · Low 4.4°C · 32 mm rain
- Scottsdale in JanuaryUnited States · 12 kmHigh 18.4°C · Low 4.7°C · 32 mm rain
- Chandler in JanuaryUnited States · 13 kmHigh 18.8°C · Low 4.6°C · 32 mm rain
- Phoenix in JanuaryUnited States · 24 kmHigh 18.6°C · Low 4.6°C · 32 mm rain
- Glendale (Arizona), United States in JanuaryUnited States · 36 kmHigh 18.5°C · Low 4.9°C · 28 mm rain
- San Tan Valley in JanuaryUnited States · 38 kmHigh 18.2°C · Low 4.9°C · 38 mm rain
- Peoria (Arizona), United States in JanuaryUnited States · 42 kmHigh 18.4°C · Low 5.1°C · 28 mm rain
- Avondale in JanuaryUnited States · 49 kmHigh 19.0°C · Low 5.0°C · 28 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.