Annual mean 23°C · wettest around January · prevailing wind SW
Warmest
38.6 °C
Coldest
15.2 °C
Wettest
61%
Windiest
3.9 m/s
Prevailing
SW
3.1 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in San Tan Valley over the whole year is 23°C. July is the hottest month, with highs of about 39°C; January is the coldest, with lows of about 7°C. The rainy (wet) season in San Tan Valley runs from July to April, peaking in January with a 56% chance of rain on a given day. The dry season is May to June; May is the driest month, at 15%. Winds in San Tan Valley are highest in May, averaging 3.3 m/s (12 km/h), and lightest in December, at 2.2 m/s (8 km/h). The prevailing wind is from the SW. The clearest skies in San Tan Valley come in June, when the sky is typically 7% covered; January is the cloudiest month, at 17%.
Month by month San Tan Valley 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
16°C
7°C
12°C
56%
17%
2.4 m/s
35
0
81
February
19°C
8°C
14°C
49%
15%
2.7 m/s
53
1
78
March
22°C
11°C
17°C
53%
17%
3.0 m/s
66
8
75
April
27°C
15°C
23°C
40%
10%
3.2 m/s
75
38
47
May
31°C
21°C
27°C
15%
8%
3.3 m/s
54
65
22
June
38°C
27°C
33°C
34%
7%
3.2 m/s
7
49
1
July
39°C
30°C
37°C
47%
14%
3.3 m/s
1
13
0
August
37°C
28°C
37°C
53%
14%
3.0 m/s
0
17
0
September
35°C
25°C
33°C
48%
12%
2.8 m/s
9
47
2
October
30°C
18°C
26°C
44%
9%
2.7 m/s
49
59
24
November
23°C
11°C
19°C
48%
11%
2.5 m/s
76
15
71
December
18°C
8°C
14°C
53%
17%
2.2 m/s
49
0
84
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 San Tan Valley weather by season
Year round, San Tan Valley has days of about 16°C at their warmest in January, its coolest month, and 39°C in July, its warmest; the coolest hours of the day run from 7°C to 30°C through the year, and the average temperature over the year is 23°C around the clock. Rain is most likely around January 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.
San Tan Valley weather in winterDecember to February
High 17°CLow 7°CRain 53%
Winter in San Tan Valley has typical daily highs of about 17°C and lows of about 7°C, with a 53% chance of rain on a given day.
San Tan Valley weather in springMarch to May
High 27°CLow 15°CRain 36%
Spring in San Tan Valley has typical daily highs of about 27°C and lows of about 15°C, with a 36% chance of rain on a given day.
San Tan Valley weather in summerJune to August
High 38°CLow 28°CRain 45%
Summer in San Tan Valley has typical daily highs of about 38°C and lows of about 28°C, with a 45% chance of rain on a given day.
San Tan Valley weather in autumnSeptember to November
High 29°CLow 18°CRain 47%
Autumn in San Tan Valley has typical daily highs of about 29°C and lows of about 18°C, with a 47% chance of rain on a given day.
When is the rainy season in San Tan Valley?
The rainy (wet) season in San Tan Valley runs from July to April, peaking in January with a 56% chance of rain on a given day. The dry season is May to June; May is the driest month, at 15%.
What time of year is San Tan Valley windiest?
Winds in San Tan Valley are highest in May, averaging 3.3 m/s (12 km/h), and lightest in December, at 2.2 m/s (8 km/h). The prevailing wind is from the SW.
What is the average temperature in San Tan Valley year round?
The average temperature in San Tan Valley over the whole year is 23°C. July is the hottest month, with highs of about 39°C; January is the coldest, with lows of about 7°C.