Tempe is at its most pleasant from March to early May, and again from late October to early December. For sun, aim for late April to early June; for walking, go from mid November to March.
When to go five ratings · thirty-six ten-day sections · click a cell to read it
The sun season here runs from late April to early June, with a second spell from late September to October. It peaks in late May, at 73. The weakest stretch is from late November to early March, when it drops to 0, mostly because it is too cool. The clearest skies come in June, when the sky is typically 18% covered at midday (mostly clear).
For being outside, go from March to early May, with a second spell from late October to early December. It peaks in mid November, at 84. Avoid late June to mid September for this: it falls to 0, mostly because it is too hot.
The walking season here runs from mid November to March. It peaks in mid January, at 92. The weakest stretch is from June to September, when it drops to 0, mostly because it is too warm.
The year, measured
The average temperature in Tempe over the whole year is 24°C. July is the hottest month, with highs of about 40°C; January is the coldest, with lows of about 8°C. Tempe has no sharply defined rainy season: the chance of rain on a given day runs from 4% in May, the driest month, to 14% in December, the wettest. Winds in Tempe are highest in July, averaging 3.4 m/s (12 km/h), and lightest in December, at 2.0 m/s (7 km/h). The prevailing wind is from the S. The clearest skies in Tempe come in June, when the sky is typically 17% covered; March is the cloudiest month, at 32%.
Month by month Tempe climate by month: average temperatures year round · click a month to read it
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | 17°C | 8°C | 13°C | 14% | 32% | 2.1 m/s | 43 | 0 | 89 |
| February | 19°C | 9°C | 15°C | 12% | 29% | 2.5 m/s | 58 | 2 | 84 |
| March | 22°C | 12°C | 18°C | 13% | 32% | 2.8 m/s | 73 | 11 | 78 |
| April | 28°C | 17°C | 23°C | 10% | 22% | 3.1 m/s | 75 | 44 | 45 |
| May | 32°C | 22°C | 27°C | 4% | 18% | 3.2 m/s | 50 | 68 | 20 |
| June | 38°C | 28°C | 34°C | 7% | 17% | 3.1 m/s | 6 | 44 | 1 |
| July | 40°C | 31°C | 38°C | 10% | 30% | 3.4 m/s | 1 | 10 | 0 |
| August | 38°C | 30°C | 37°C | 11% | 30% | 3.0 m/s | 0 | 11 | 0 |
| September | 36°C | 26°C | 34°C | 10% | 23% | 2.7 m/s | 9 | 41 | 2 |
| October | 30°C | 19°C | 27°C | 8% | 18% | 2.4 m/s | 48 | 63 | 23 |
| November | 23°C | 12°C | 20°C | 11% | 24% | 2.1 m/s | 81 | 19 | 71 |
| December | 18°C | 8°C | 14°C | 14% | 31% | 2.0 m/s | 54 | 1 | 89 |
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Tempe weather by season
Year round, Tempe has days of about 17°C at their warmest in January, its coolest month, and 40°C in July, its warmest; the coolest hours of the day run from 8°C to 31°C through the year, and the average temperature over the year is 24°C around the clock. Rain is most likely around December and least likely around May. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Tempe weather in winterDecember to February
Winter in Tempe has typical daily highs of about 18°C and lows of about 8°C, with a 13% chance of rain on a given day.
Tempe weather in springMarch to May
Spring in Tempe has typical daily highs of about 27°C and lows of about 17°C, with a 9% chance of rain on a given day.
Tempe weather in summerJune to August
Summer in Tempe has typical daily highs of about 39°C and lows of about 29°C, with a 9% chance of rain on a given day.
Tempe weather in autumnSeptember to November
Autumn in Tempe has typical daily highs of about 30°C and lows of about 19°C, with a 10% chance of rain on a given day.
When is the rainy season in Tempe?
Tempe has no sharply defined rainy season: the chance of rain on a given day runs from 4% in May, the driest month, to 14% in December, the wettest.
What time of year is Tempe windiest?
Winds in Tempe are highest in July, averaging 3.4 m/s (12 km/h), and lightest in December, at 2.0 m/s (7 km/h). The prevailing wind is from the S.
What is the average temperature in Tempe year round?
The average temperature in Tempe over the whole year is 24°C. July is the hottest month, with highs of about 40°C; January is the coldest, with lows of about 8°C.
Where to go instead in early July, the weakest time here for being outside
How this is worked out
Every figure is a decade of weather-station observations blended into one typical year, in ten-day sections. The ratings, the chart and the feels-like column are read at midday local solar time. Being outside is the Easy outdoors rating, Sun is Sunbathing and Walking is Active outdoors, each out of 100: Good from 55, Ideal from 80. They describe what a time of year is usually like here, not a forecast. The dotted links open the map at that time of year; set its time of day to midday to see these numbers.