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Tempe Junction, Arizona climate
BWh Hot desert
Tempe Junction has a seasonal warm-temperate climate (Hot desert, Köppen BWh). The hottest month is July with an average daily high near 106°F, while the coldest is December averaging around 38°F at night. Precipitation totals about 9 inches a year and is strongly seasonal — August alone averages 1.3 inches while June barely receives 0.06 inches.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsTempe Junction climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 71 | 74 | 80 | 87 | 95 | 104 | 106 | 105 | 101 | 91 | 79 | 69 |
| Avg temp (°F) | 55 | 57 | 63 | 69 | 77 | 85 | 91 | 90 | 85 | 74 | 62 | 54 |
| Avg low (°F) | 39 | 41 | 46 | 51 | 59 | 67 | 76 | 75 | 69 | 56 | 45 | 38 |
| Precipitation (in) | 1.0 | 1.1 | 1.0 | 0.2 | 0.2 | 0.1 | 1.0 | 1.3 | 0.7 | 0.6 | 0.7 | 1.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 71 | 74 | 80 | 87 | 95 | 104 |
| Avg temp (°F) | 55 | 57 | 63 | 69 | 77 | 85 |
| Avg low (°F) | 39 | 41 | 46 | 51 | 59 | 67 |
| Precipitation (in) | 1.0 | 1.1 | 1.0 | 0.2 | 0.2 | 0.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 106 | 105 | 101 | 91 | 79 | 69 |
| Avg temp (°F) | 91 | 90 | 85 | 74 | 62 | 54 |
| Avg low (°F) | 76 | 75 | 69 | 56 | 45 | 38 |
| Precipitation (in) | 1.0 | 1.3 | 0.7 | 0.6 | 0.7 | 1.0 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 4 | 4 | 3 | 1 | 1 | 0.6 | 4 | 4 | 3 | 2 | 2 | 4 |
| Days with high ≥ 90°F (days) | — | 0.0 | 2 | 10 | 22 | 27 | 29 | 29 | 27 | 17 | 2 | — |
| Days with low ≤ 32°F (days) | 3 | 2 | 0.1 | 0.0 | — | — | — | — | — | — | 0.5 | 4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 4 | 4 | 3 | 1 | 1 | 0.6 |
| Days with high ≥ 90°F (days) | — | 0.0 | 2 | 10 | 22 | 27 |
| Days with low ≤ 32°F (days) | 3 | 2 | 0.1 | 0.0 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 4 | 4 | 3 | 2 | 2 | 4 |
| Days with high ≥ 90°F (days) | 29 | 29 | 27 | 17 | 2 | — |
| Days with low ≤ 32°F (days) | — | — | — | — | 0.5 | 4 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 42 | 44 | 38 | 30 | 25 | 20 | 46 | 45 | 29 | 27 | 32 | 42 |
| Clear days (≤ 30% cloud) | 14 | 12 | 15 | 18 | 21 | 23 | 10 | 11 | 18 | 20 | 17 | 14 |
| Partly cloudy days (30–70%) | 9 | 8 | 9 | 8 | 8 | 5 | 14 | 14 | 8 | 6 | 7 | 8 |
| Cloudy days (≥ 70%) | 8 | 8 | 7 | 4 | 3 | 2 | 8 | 7 | 4 | 5 | 5 | 8 |
| Relative humidity (%) | 47 | 45 | 40 | 31 | 23 | 16 | 29 | 35 | 32 | 30 | 35 | 45 |
| Wind speed (mph) | 4.3 | 4.3 | 4.4 | 4.9 | 4.9 | 5.0 | 4.5 | 4.0 | 4.3 | 4.4 | 4.4 | 4.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 42 | 44 | 38 | 30 | 25 | 20 |
| Clear days (≤ 30% cloud) | 14 | 12 | 15 | 18 | 21 | 23 |
| Partly cloudy days (30–70%) | 9 | 8 | 9 | 8 | 8 | 5 |
| Cloudy days (≥ 70%) | 8 | 8 | 7 | 4 | 3 | 2 |
| Relative humidity (%) | 47 | 45 | 40 | 31 | 23 | 16 |
| Wind speed (mph) | 4.3 | 4.3 | 4.4 | 4.9 | 4.9 | 5.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 46 | 45 | 29 | 27 | 32 | 42 |
| Clear days (≤ 30% cloud) | 10 | 11 | 18 | 20 | 17 | 14 |
| Partly cloudy days (30–70%) | 14 | 14 | 8 | 6 | 7 | 8 |
| Cloudy days (≥ 70%) | 8 | 7 | 4 | 5 | 5 | 8 |
| Relative humidity (%) | 29 | 35 | 32 | 30 | 35 | 45 |
| Wind speed (mph) | 4.5 | 4.0 | 4.3 | 4.4 | 4.4 | 4.2 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Tempe Asu (NOAA GHCN station USC00028499), about 2 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.