San Tan Valley, AZ weather in October
October in San Tan Valley: hot and dry. Highs 91°F, lows 56°F, about 2 days with rain.
- Normal high
- 91°F
- Normal low
- 56°F
- Wet days
- 2
- 0.5 in total
- Muggy days
- 0
- dew point 65°F+
How October changes from start to finish
| October 1 | October 31 | |
|---|---|---|
| Normal high | 96°F | 85°F |
| Normal low | 63°F | 50°F |
| Chance of a wet day | 7% | 7% |
| Sunrise / sunset | 6:20 am / 6:11 pm | 6:43 am / 5:35 pm |
| Daylight | 11.8 h | 10.9 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 October day
- 6 am67°Fdew point 42°F
- 9 am74°Fdew point 41°F
- Noon83°Fdew point 40°F
- 3 pm88°Fdew point 38°F
- 6 pm85°Fdew point 37°F
- 9 pm78°Fdew point 41°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°F3 of 31
- Hot dayshigh 90°F or more19 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow2 of 31
- Notable rainat least 0.10 in1 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per October, counted from daily records for each year 1991-2020.
Rain in October
Normal precipitation is 0.5 in; a dry October brings about 0.0 in and a wet one about 0.7 in (25th and 75th percentiles). Days with half an inch or more are rare.
How October varies from year to year
- Warmest October, 1991-20201995: average high 97°F
- Coolest October2018: average high 85°F
- Wettest October2000: 2.3 in
- Driest October1995: no measurable precipitation
- Highest reading108°F (October 2, 1997)
- Lowest reading32°F (October 29, 1996)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
October compared with September and November
| September | October | November | |
|---|---|---|---|
| Normal high | 101°F | 91°F | 78°F |
| Normal low | 70°F | 56°F | 44°F |
| Wet days | 3 | 2 | 2 |
| Comfortable days | 0 | 3 | 16 |
| Daylight | 12.4 h | 11.3 h | 10.5 h |
Highs change by -10°F from September and -13°F into November.
Nearby alternatives in October
- Cooler: Sedona, AZ117 mi · high 79°F · 3 wet days
How San Tan Valley ranks in October
- Normal high3rd warmest of 378 cities; 1st of 13 in Arizona
- Wet days25th driest of 378
- Comfortable days309th most of 340
What to pack for San Tan Valley in October
- Light, breathable clothing – highs near 91°F
- Layers – afternoons near 91°F but nights near 56°F
Heating and cooling
October has 18 heating degree days and 278 cooling degree days (base 65°F), 6% of the year's total heating and cooling demand.
Questions
How hot is San Tan Valley in October?
The normal high is 91°F and the normal low is 56°F. From 1991 to 2020 the hottest October reading was 108°F (October 2, 1997).
Does it rain a lot in San Tan Valley in October?
About 2 days in October have at least 0.01 in of precipitation, and the normal total is 0.5 in. The wettest October in 1991-2020 was in 2000 (2.3 in); the driest was in 1995, with no measurable precipitation.
Is October a good time to visit San Tan Valley?
October ranks 8th of 12 months on our comfort score for San Tan Valley (42 out of 100). It has about 3 comfortable days and about 19 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).