Alton weather by month
What a typical year looks like in Alton, Utah: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Alton, 3 km from Alton; records cover 1915–2026.
The year at a glance
- Precipitation a year
- 17.3 in439 mm
- Snow a year
- 78 in197 cm
- Last spring freeze
- Jun 1
- First fall freeze
- Sep 24
- Heating degree days
- 6,662
- Cooling degree days
- 237
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 2°−17° (heating, 99%) and 92°33° (cooling, 1%).
Month by month
Alton in January
Highs average 41°5° and lows 18°−8°, with 2 in52 mm of precipitation and 18 in45 cm of snow in a typical January.
- Record high
- 64°18° (1920)
- Record low
- −20°−29° (1979)
- Heating degree days
- 1097
- Cooling degree days
- 0
Alton in February
Highs average 43°6° and lows 19°−7°, with 2.1 in53 mm of precipitation and 19 in47 cm of snow in a typical February.
- Record high
- 68°20° (1986)
- Record low
- −17°−27° (1933)
- Heating degree days
- 941
- Cooling degree days
- 0
Alton in March
Highs average 52°11° and lows 24°−4°, with 1.5 in38 mm of precipitation and 13 in32 cm of snow in a typical March.
- Record high
- 81°27° (2026)
- Record low
- −7°−22° (1962)
- Heating degree days
- 839
- Cooling degree days
- 0
Alton in April
Highs average 60°16° and lows 29°−2°, with 0.82 in21 mm of precipitation and 5 in13 cm of snow in a typical April.
- Record high
- 81°27° (1981)
- Record low
- −2°−19° (1920)
- Heating degree days
- 615
- Cooling degree days
- 0
Alton in May
Highs average 69°21° and lows 35°2°, with 0.87 in22 mm of precipitation and 0.3 in0.8 cm of snow in a typical May.
- Record high
- 90°32° (2002)
- Record low
- 5°−15° (1915)
- Heating degree days
- 395
- Cooling degree days
- 2
Alton in June
Highs average 81°27° and lows 43°6°, with 0.41 in10 mm of precipitation and 0.4 in1 cm of snow in a typical June.
- Record high
- 96°36° (2013)
- Record low
- 23°−5° (1955)
- Heating degree days
- 129
- Cooling degree days
- 31
Alton in July
Highs average 85°30° and lows 51°11°, with 1.2 in30 mm of precipitation in a typical July.
- Record high
- 101°38° (2021)
- Record low
- 32°0° (1928)
- Heating degree days
- 18
- Cooling degree days
- 119
Alton in August
Highs average 83°28° and lows 50°10°, with 1.9 in47 mm of precipitation in a typical August.
- Record high
- 97°36° (2020)
- Record low
- 32°0° (1942)
- Heating degree days
- 28
- Cooling degree days
- 77
Alton in September
Highs average 76°24° and lows 43°6°, with 1.7 in43 mm of precipitation in a typical September.
- Record high
- 93°34° (2020)
- Record low
- 20°−7° (1965)
- Heating degree days
- 176
- Cooling degree days
- 8
Alton in OctoberThis month
Highs average 64°18° and lows 34°1°, with 1.8 in46 mm of precipitation and 2 in5.1 cm of snow in a typical October.
- Record high
- 85°29° (2020)
- Record low
- −2°−19° (1971)
- Heating degree days
- 502
- Cooling degree days
- 0
Alton in November
Highs average 51°11° and lows 24°−4°, with 1.2 in31 mm of precipitation and 6 in16 cm of snow in a typical November.
- Record high
- 77°25° (2015)
- Record low
- −5°−21° (1931)
- Heating degree days
- 818
- Cooling degree days
- 0
Alton in December
Highs average 41°5° and lows 18°−8°, with 1.8 in46 mm of precipitation and 14 in36 cm of snow in a typical December.
- Record high
- 67°19° (1962)
- Record low
- −24°−31° (1990)
- Heating degree days
- 1104
- Cooling degree days
- 0