Mormon Lake weather by month
What a typical year looks like in Mormon Lake, Arizona: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Happy Jack Ranger Station, 19 km from Mormon Lake; records cover 1969–2026.
The year at a glance
- Precipitation a year
- 24 in611 mm
- Snow a year
- Rare
- Last spring freeze
- Jun 6
- First fall freeze
- Sep 30
- Heating degree days
- 7,062
- Cooling degree days
- 80
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 0°−18° (heating, 99%) and 87°31° (cooling, 1%).
Month by month
Mormon Lake in January
Highs average 40°5° and lows 19°−7°, with 3 in75 mm of precipitation in a typical January.
- Record high
- 65°18° (2003)
- Record low
- −35°−37° (1979)
- Heating degree days
- 1096
- Cooling degree days
- 0
Mormon Lake in February
Highs average 42°6° and lows 20°−6°, with 2.9 in74 mm of precipitation in a typical February.
- Record high
- 76°24° (1991)
- Record low
- −16°−27° (1985)
- Heating degree days
- 944
- Cooling degree days
- 0
Mormon Lake in March
Highs average 49°9° and lows 25°−4°, with 2.5 in64 mm of precipitation in a typical March.
- Record high
- 81°27° (2026)
- Record low
- −12°−24° (1971)
- Heating degree days
- 874
- Cooling degree days
- 0
Mormon Lake in April
Highs average 56°13° and lows 29°−1°, with 1 in25 mm of precipitation in a typical April.
- Record high
- 76°24° (1996)
- Record low
- −2°−19° (1975)
- Heating degree days
- 675
- Cooling degree days
- 0
Mormon Lake in May
Highs average 65°18° and lows 36°2°, with 0.81 in21 mm of precipitation in a typical May.
- Record high
- 87°31° (2002)
- Record low
- 12°−11° (1975)
- Heating degree days
- 455
- Cooling degree days
- 0
Mormon Lake in June
Highs average 75°24° and lows 43°6°, with 0.34 in8.6 mm of precipitation in a typical June.
- Record high
- 97°36° (1994)
- Record low
- 22°−6° (1993)
- Heating degree days
- 182
- Cooling degree days
- 11
Mormon Lake in July
Highs average 78°26° and lows 51°11°, with 2.6 in65 mm of precipitation in a typical July.
- Record high
- 94°34° (2003)
- Record low
- 12°−11° (2026)
- Heating degree days
- 48
- Cooling degree days
- 44
Mormon Lake in August
Highs average 75°24° and lows 51°11°, with 3.2 in80 mm of precipitation in a typical August.
- Record high
- 92°33° (2020)
- Record low
- 30°−1° (2002)
- Heating degree days
- 79
- Cooling degree days
- 23
Mormon Lake in September
Highs average 71°21° and lows 44°7°, with 2 in51 mm of precipitation in a typical September.
- Record high
- 88°31° (2020)
- Record low
- 23°−5° (2017)
- Heating degree days
- 238
- Cooling degree days
- 2
Mormon Lake in OctoberThis month
Highs average 61°16° and lows 34°1°, with 1.5 in38 mm of precipitation in a typical October.
- Record high
- 80°27° (2003)
- Record low
- 0°−18° (1971)
- Heating degree days
- 550
- Cooling degree days
- 0
Mormon Lake in November
Highs average 50°10° and lows 25°−4°, with 1.7 in43 mm of precipitation in a typical November.
- Record high
- 71°22° (2009)
- Record low
- −5°−21° (1985)
- Heating degree days
- 828
- Cooling degree days
- 0
Mormon Lake in December
Highs average 41°5° and lows 19°−7°, with 2.6 in66 mm of precipitation in a typical December.
- Record high
- 70°21° (2003)
- Record low
- −27°−33° (1988)
- Heating degree days
- 1093
- Cooling degree days
- 0