South Tucson weather by month
What a typical year looks like in South Tucson, Arizona: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Tucson 17 NW, 22 km from South Tucson; records cover 1982–2026.
The year at a glance
- Precipitation a year
- 11.1 in281 mm
- Snow a year
- Rare
- Last spring freeze
- Feb 6
- First fall freeze
- Dec 5
- Heating degree days
- 1,446
- Cooling degree days
- 3,316
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 29°−2° (heating, 99%) and 109°43° (cooling, 1%).
Month by month
South Tucson in January
Highs average 67°19° and lows 39°4°, with 1 in26 mm of precipitation in a typical January.
- Record high
- 87°31° (2000)
- Record low
- 15°−9° (2013)
- Heating degree days
- 372
- Cooling degree days
- 2
South Tucson in February
Highs average 70°21° and lows 41°5°, with 0.97 in25 mm of precipitation in a typical February.
- Record high
- 90°32° (2009)
- Record low
- 19°−7° (2008)
- Heating degree days
- 273
- Cooling degree days
- 5
South Tucson in March
Highs average 76°24° and lows 46°8°, with 0.74 in19 mm of precipitation in a typical March.
- Record high
- 102°39° (2026)
- Record low
- 26°−3° (1984)
- Heating degree days
- 163
- Cooling degree days
- 38
South Tucson in April
Highs average 84°29° and lows 51°11°, with 0.25 in6.4 mm of precipitation in a typical April.
- Record high
- 104°40° (1989)
- Record low
- 27°−3° (1984)
- Heating degree days
- 55
- Cooling degree days
- 133
South Tucson in May
Highs average 93°34° and lows 59°15°, with 0.2 in5.1 mm of precipitation in a typical May.
- Record high
- 108°42° (1983)
- Record low
- 33°1° (2014)
- Heating degree days
- 7
- Cooling degree days
- 346
South Tucson in June
Highs average 102°39° and lows 69°21°, with 0.27 in6.9 mm of precipitation in a typical June.
- Record high
- 116°47° (2017)
- Record low
- 40°4° (2007)
- Heating degree days
- 0
- Cooling degree days
- 618
South Tucson in July
Highs average 102°39° and lows 74°23°, with 2.1 in53 mm of precipitation in a typical July.
- Record high
- 114°46° (1995)
- Record low
- 50°10° (2007)
- Heating degree days
- 0
- Cooling degree days
- 710
South Tucson in August
Highs average 100°38° and lows 73°23°, with 2 in51 mm of precipitation in a typical August.
- Record high
- 113°45° (2012)
- Record low
- 48°9° (2013)
- Heating degree days
- 0
- Cooling degree days
- 657
South Tucson in September
Highs average 97°36° and lows 68°20°, with 1.3 in33 mm of precipitation in a typical September.
- Record high
- 109°43° (2011)
- Record low
- 45°7° (2016)
- Heating degree days
- 0
- Cooling degree days
- 515
South Tucson in OctoberThis month
Highs average 87°31° and lows 57°14°, with 0.71 in18 mm of precipitation in a typical October.
- Record high
- 106°41° (2010)
- Record low
- 35°2° (2009)
- Heating degree days
- 22
- Cooling degree days
- 244
South Tucson in November
Highs average 76°24° and lows 47°8°, with 0.54 in14 mm of precipitation in a typical November.
- Record high
- 95°35° (1999)
- Record low
- 26°−3° (2004)
- Heating degree days
- 162
- Cooling degree days
- 46
South Tucson in December
Highs average 66°19° and lows 39°4°, with 1 in25 mm of precipitation in a typical December.
- Record high
- 88°31° (1999)
- Record low
- 21°−6° (2011)
- Heating degree days
- 392
- Cooling degree days
- 2