Alamo Lake weather by month
What a typical year looks like in Alamo Lake, Arizona: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Alamo Dam, 8 km from Alamo Lake; records cover 1975–2026.
The year at a glance
- Precipitation a year
- 7.8 in199 mm
- Snow a year
- Rare
- Last spring freeze
- Feb 17
- First fall freeze
- Nov 30
- Heating degree days
- 1,900
- Cooling degree days
- 3,378
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 26°−3° (heating, 99%) and 116°47° (cooling, 1%).
Month by month
Alamo Lake in January
Highs average 66°19° and lows 32°0°, with 1 in26 mm of precipitation in a typical January.
- Record high
- 84°29° (2018)
- Record low
- 19°−7° (2007)
- Heating degree days
- 504
- Cooling degree days
- 0
Alamo Lake in February
Highs average 70°21° and lows 36°2°, with 1.1 in29 mm of precipitation in a typical February.
- Record high
- 90°32° (2016)
- Record low
- 21°−6° (1990)
- Heating degree days
- 340
- Cooling degree days
- 0
Alamo Lake in March
Highs average 77°25° and lows 41°5°, with 0.77 in20 mm of precipitation in a typical March.
- Record high
- 102°39° (2004)
- Record low
- 26°−3° (2002)
- Heating degree days
- 196
- Cooling degree days
- 20
Alamo Lake in April
Highs average 85°29° and lows 48°9°, with 0.24 in6.1 mm of precipitation in a typical April.
- Record high
- 107°42° (2012)
- Record low
- 30°−1° (2023)
- Heating degree days
- 61
- Cooling degree days
- 111
Alamo Lake in May
Highs average 94°35° and lows 57°14°, with 0.08 in2 mm of precipitation in a typical May.
- Record high
- 114°46° (1983)
- Record low
- 33°1° (2011)
- Heating degree days
- 10
- Cooling degree days
- 341
Alamo Lake in June
Highs average 105°40° and lows 65°18°, with 0.06 in1.5 mm of precipitation in a typical June.
- Record high
- 123°51° (1994)
- Record low
- 43°6° (2007)
- Heating degree days
- 0
- Cooling degree days
- 597
Alamo Lake in July
Highs average 108°42° and lows 74°23°, with 0.82 in21 mm of precipitation in a typical July.
- Record high
- 124°51° (1995)
- Record low
- 58°14° (1995)
- Heating degree days
- 0
- Cooling degree days
- 800
Alamo Lake in August
Highs average 107°42° and lows 73°23°, with 1.2 in30 mm of precipitation in a typical August.
- Record high
- 121°49° (2020)
- Record low
- 59°15° (1979)
- Heating degree days
- 0
- Cooling degree days
- 764
Alamo Lake in September
Highs average 101°39° and lows 64°18°, with 0.74 in19 mm of precipitation in a typical September.
- Record high
- 118°48° (2020)
- Record low
- 37°3° (2017)
- Heating degree days
- 0
- Cooling degree days
- 536
Alamo Lake in OctoberThis month
Highs average 90°32° and lows 51°11°, with 0.55 in14 mm of precipitation in a typical October.
- Record high
- 111°44° (2024)
- Record low
- 29°−2° (2019)
- Heating degree days
- 26
- Cooling degree days
- 195
Alamo Lake in November
Highs average 76°24° and lows 40°4°, with 0.56 in14 mm of precipitation in a typical November.
- Record high
- 98°37° (2020)
- Record low
- 25°−4° (2010)
- Heating degree days
- 235
- Cooling degree days
- 14
Alamo Lake in December
Highs average 65°18° and lows 31°0°, with 0.66 in17 mm of precipitation in a typical December.
- Record high
- 84°29° (1999)
- Record low
- 19°−7° (1990)
- Heating degree days
- 528
- Cooling degree days
- 0