San Tan Valley weather by month
Average highs run from 68°F in January to 105°F in July, and January nights average 42°F. It gets 9 inches of rain and melted snow a year, with almost no snow. Expect about 168 days a year at 90°F or hotter. The most comfortable months are January to April and November.
Best time to visit San Tan Valley
For comfortable weather, go in January to April and November. In those months the average high stays between 62°F and 86°F, nights average 42°F or warmer, and rain stays under 4.5 inches for the month.
Month by month
| Month | High | Low | Precip. | Snow | Wet days | Days 90°F+ | Nights below 32°F | Feels |
|---|---|---|---|---|---|---|---|---|
| January | 68°F | 42°F | 1.4 in | 0.0 in | 2 | 0 | 3 | mild |
| February | 71°F | 44°F | 0.9 in | 0.0 in | 3 | 0 | 1 | mild |
| March | 79°F | 49°F | 1.2 in | 0.0 in | 2 | 1 | 1 | warm |
| April | 86°F | 53°F | 0.3 in | 0.0 in | 1 | 9 | 0 | warm |
| May | 94°F | 61°F | 0.4 in | 0.0 in | 1 | 23 | 0 | hot |
| June | 103°F | 70°F | 0.0 in | 0.0 in | 0 | 29 | 0 | very hot |
| July | 105°F | 78°F | 1.2 in | 0.0 in | 2 | 31 | 0 | very hot |
| August | 103°F | 78°F | 1.1 in | 0.0 in | 3 | 30 | 0 | very hot |
| September | 99°F | 72°F | 0.3 in | 0.0 in | 1 | 28 | 0 | very hot |
| October | 89°F | 60°F | 0.5 in | 0.0 in | 1 | 16 | 0 | hot |
| November | 77°F | 48°F | 0.5 in | 0.0 in | 1 | 1 | 1 | warm |
| December | 67°F | 41°F | 1.0 in | 0.0 in | 2 | 0 | 4 | mild days, chilly nights |
| Year | 87°F avg | 58°F avg | 8.6 in | 0.0 in | 18 | 168 | 10 |
"Wet days" are days with at least 0.1 inch of precipitation. "Feels" is a plain-language label for the average high. Normals for 1991-2020 from NOAA NCEI, station Florence, AZ (USC00023027), 13.4 miles from the city center. Averages describe typical conditions, not a forecast.
Sunrise, sunset and daylight in San Tan Valley
The shortest day is December 21, with 9h 57m of daylight; the longest is June 21, with 14h 21m. The earliest sunset comes around November 28 (5:18 pm) and the latest around June 27 (7:39 pm). The sun never sets after 8 pm here.
| On the 15th of | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:29 am | 5:41 pm | 10h 12m |
| February | 7:09 am | 6:11 pm | 11h 01m |
| March | 6:36 am | 6:33 pm | 11h 57m |
| April | 5:56 am | 6:56 pm | 13h 00m |
| May | 5:26 am | 7:18 pm | 13h 52m |
| June | 5:16 am | 7:36 pm | 14h 20m |
| July | 5:28 am | 7:35 pm | 14h 07m |
| August | 5:49 am | 7:11 pm | 13h 22m |
| September | 6:09 am | 6:31 pm | 12h 22m |
| October | 6:30 am | 5:52 pm | 11h 21m |
| November | 6:57 am | 5:23 pm | 10h 26m |
| December | 7:22 am | 5:20 pm | 9h 58m |
Calculated for 2026 at the center of San Tan Valley with NOAA's solar equations, in local clock time (Mountain Standard Time, including daylight saving time where it applies). Times shift by a minute or two from year to year.
Is San Tan Valley getting warmer?
The last 10 years averaged 2.7°F warmer than the 20th century. See the climate stripes for San Tan Valley.Frequently asked questions
What is the warmest month in San Tan Valley?
July is the warmest month, with an average high of 105°F and an average low of 78°F (NOAA 1991-2020 normals).
What is the coldest month in San Tan Valley?
December is the coldest, with average lows of 41°F and highs of 67°F.
What is the rainiest month in San Tan Valley?
January gets the most precipitation, 1.4 inches on average. June is the driest at 0.0 inches.
Does it snow in San Tan Valley?
Very little. The normal yearly snowfall is under one inch.
When is the best time to visit San Tan Valley?
For comfortable weather, January to April and November. Those months average highs between 62 and 86°F with lows of 42°F or more and modest rain.
Thinking of moving to San Tan Valley?
See what homes, rent and everyday prices cost, who lives there and how it compares with nearby cities on the full San Tan Valley profile.
Compare the weather: San Tan Valley vs Queen Creek, San Tan Valley vs Gilbert, San Tan Valley vs Chandler, San Tan Valley vs Mesa.