Climate averages 1991–2020
Tempe weather
in January.
A mild, fairly dry 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 Tempe: daytime highs average 18.6°C and nights cool to about 4.4°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 32 mm of rain on roughly 4 days, which makes January a fairly dry 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 Mesa (8 km away). In January its highs average 18.5°C, about as warm as Tempe, with 40 mm of rain.
Among the 498 cities listed in the United States, Tempe ranks joint 49th of 498 for the warmest January highs and joint 62nd of 498 for the driest January (rainfall, lowest first). The mean January high of those 498 cities is 9.5°C; Tempe is 9.1°C warmer than that mean.
From January to February, average highs rise by 1.8°C to 20.4°C, and monthly rainfall rises from 32 mm to 38 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
Tempe climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 18.6°C4.4°C | 4.4°C | 32 | 3.7 | 10.210 h |
| February | 20.4°C6.1°C | 6.1°C | 38 | 4.1 | 11.011 h |
| March | 24.5°C9.0°C | 9.0°C | 26 | 2.8 | 12.012 h |
| April | 29.0°C13.0°C | 13.0°C | 8.0 | 1.3 | 13.013 h |
| May | 34.1°C18.3°C | 18.3°C | 4.1 | 0.6 | 13.914 h |
| June | 39.6°C23.7°C | 23.7°C | 1.8 | 0.4 | 14.314 h |
| July | 40.5°C27.8°C | 27.8°C | 19 | 3.5 | 14.114 h |
| August | 39.5°C27.3°C | 27.3°C | 29 | 4.4 | 13.413 h |
| September | 36.8°C23.2°C | 23.2°C | 24 | 3.1 | 12.412 h |
| October | 30.7°C15.8°C | 15.8°C | 20 | 2.2 | 11.411 h |
| November | 23.7°C9.1°C | 9.1°C | 18 | 2.2 | 10.510 h |
| December | 17.8°C4.3°C | 4.3°C | 28 | 3.6 | 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
- Mesa in JanuaryUnited States · 8 kmHigh 18.5°C · Low 4.3°C · 40 mm rain
- Scottsdale in JanuaryUnited States · 11 kmHigh 18.4°C · Low 4.7°C · 32 mm rain
- Chandler in JanuaryUnited States · 14 kmHigh 18.8°C · Low 4.6°C · 32 mm rain
- Phoenix in JanuaryUnited States · 16 kmHigh 18.6°C · Low 4.6°C · 32 mm rain
- Glendale (Arizona), United States in JanuaryUnited States · 29 kmHigh 18.5°C · Low 4.9°C · 28 mm rain
- Peoria (Arizona), United States in JanuaryUnited States · 36 kmHigh 18.4°C · Low 5.1°C · 28 mm rain
- Avondale in JanuaryUnited States · 41 kmHigh 19.0°C · Low 5.0°C · 28 mm rain
- Goodyear in JanuaryUnited States · 42 kmHigh 19.0°C · Low 5.1°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 Tempe) is explained once on the Tempe year overview and on the Sources, method and limits page.
Phoenix and Scottsdale lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.