San Tan Valley, AZ weather in March
Expect mild, mostly dry weather in San Tan Valley in March, with highs near 78°F and lows near 45°F. Rain falls on about 3 days. Good for outdoor plans.
- Normal high
- 78°F
- Normal low
- 45°F
- Wet days
- 3
- 0.9 in total
- Muggy days
- 0
- dew point 65°F+
How March changes from start to finish
| March 1 | March 31 | |
|---|---|---|
| Normal high | 74°F | 83°F |
| Normal low | 43°F | 47°F |
| Chance of a wet day | 13% | 8% |
| Sunrise / sunset | 6:54 am / 6:22 pm | 6:15 am / 6:45 pm |
| Daylight | 11.5 h | 12.5 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Arizona time (no daylight saving)).
A typical March day
- 6 am56°Fdew point 36°F
- 9 am62°Fdew point 35°F
- Noon71°Fdew point 32°F
- 3 pm76°Fdew point 30°F
- 6 pm75°Fdew point 30°F
- 9 pm69°Fdew point 33°F
NOAA hourly normals (local standard time) from Phoenix Sky Harbor Intl Airport (32 mi away); average wind 6 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F15 of 31
- Hot dayshigh 90°F or more3 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow3 of 31
- Notable rainat least 0.10 in2 of 31
- Freezing nightslow 32°F or below1 of 31
Average days per March, counted from daily records for each year 1991-2020.
Rain in March
Normal precipitation is 0.9 in; a dry March brings about 0.2 in and a wet one about 1.5 in (25th and 75th percentiles). About 1 day brings half an inch or more.
How March varies from year to year
- Warmest March, 1991-20201997: average high 86°F
- Coolest March1991: average high 69°F
- Wettest March1992: 3.0 in
- Driest March2009: no measurable precipitation
- Highest reading99°F (March 18, 2007)
- Lowest reading24°F (March 3, 2002)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
March compared with February and April
| February | March | April | |
|---|---|---|---|
| Normal high | 71°F | 78°F | 86°F |
| Normal low | 40°F | 45°F | 51°F |
| Wet days | 4 | 3 | 1 |
| Comfortable days | 18 | 15 | 7 |
| Daylight | 11.0 h | 12.0 h | 13.0 h |
Highs change by +7°F from February and +8°F into April.
Nearby alternatives in March
- Cooler: Sedona, AZ117 mi · high 68°F · 6 wet days
How San Tan Valley ranks in March
- Normal high25th warmest of 378 cities; 2nd of 13 in Arizona
- Wet days12th driest of 378
- Comfortable days95th most of 339
What to pack for San Tan Valley in March
- Layers – afternoons near 78°F but nights near 45°F
Heating and cooling
March has 143 heating degree days and 41 cooling degree days (base 65°F), 4% of the year's total heating and cooling demand.
Questions
How hot is San Tan Valley in March?
The normal high is 78°F and the normal low is 45°F. From 1991 to 2020 the hottest March reading was 99°F (most recently on March 18, 2007).
Does it rain a lot in San Tan Valley in March?
About 3 days in March have at least 0.01 in of precipitation, and the normal total is 0.9 in. The wettest March in 1991-2020 was in 1992 (3.0 in); the driest was in 2009, with no measurable precipitation.
Is March a good time to visit San Tan Valley?
March ranks 4th of 12 months on our comfort score for San Tan Valley (68 out of 100). It has about 15 comfortable days and about 3 days at 90°F or hotter. The best months are January, February and December.
Where the numbers come from
- Temperature, rain, snowfall and snow depth: Casa Grande Nm (USC00021314), 14 mi S of the city center, 1,419 ft (103 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Frost dates: Chandler Heights (USC00021514), 9.0 mi W of the city center, 1,425 ft (97 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Phoenix Sky Harbor Intl Airport (USW00023183), 32 mi WNW of the city center, 1,107 ft (415 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Phoenix Sky Harbor Intl Airport (722780-23183), 32 mi WNW of the city center, 1,113 ft (409 ft lower than the city). Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).