Koosharem weather by month
What a typical year looks like in Koosharem, Utah: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Loa, 24 km from Koosharem; records cover 1893–2026.
The year at a glance
- Precipitation a year
- 8.4 in214 mm
- Snow a year
- 19 in49 cm
- Last spring freeze
- May 31
- First fall freeze
- Sep 15
- Heating degree days
- 7,604
- Cooling degree days
- 151
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −8°−22° (heating, 99%) and 90°32° (cooling, 1%).
Month by month
Koosharem in January
Highs average 40°4° and lows 10°−12°, with 0.39 in9.9 mm of precipitation and 4 in10 cm of snow in a typical January.
- Record high
- 65°18° (1971)
- Record low
- −33°−36° (1937)
- Heating degree days
- 1254
- Cooling degree days
- 0
Koosharem in February
Highs average 43°6° and lows 14°−10°, with 0.45 in11 mm of precipitation and 5 in14 cm of snow in a typical February.
- Record high
- 70°21° (1904)
- Record low
- −37°−38° (1929)
- Heating degree days
- 1032
- Cooling degree days
- 0
Koosharem in March
Highs average 51°11° and lows 20°−6°, with 0.51 in13 mm of precipitation and 2.2 in5.6 cm of snow in a typical March.
- Record high
- 85°29° (2026)
- Record low
- −15°−26° (1903)
- Heating degree days
- 905
- Cooling degree days
- 0
Koosharem in April
Highs average 58°14° and lows 26°−3°, with 0.5 in13 mm of precipitation and 0.7 in1.8 cm of snow in a typical April.
- Record high
- 81°27° (2025)
- Record low
- −3°−19° (1956)
- Heating degree days
- 687
- Cooling degree days
- 0
Koosharem in May
Highs average 67°20° and lows 35°2°, with 0.75 in19 mm of precipitation and 0.5 in1.3 cm of snow in a typical May.
- Record high
- 92°33° (1896)
- Record low
- 10°−12° (1902)
- Heating degree days
- 433
- Cooling degree days
- 1
Koosharem in June
Highs average 78°26° and lows 43°6°, with 0.57 in14 mm of precipitation in a typical June.
- Record high
- 98°37° (1903)
- Record low
- 19°−7° (1901)
- Heating degree days
- 156
- Cooling degree days
- 21
Koosharem in July
Highs average 84°29° and lows 50°10°, with 1.3 in34 mm of precipitation in a typical July.
- Record high
- 101°38° (1903)
- Record low
- 19°−7° (1902)
- Heating degree days
- 27
- Cooling degree days
- 84
Koosharem in August
Highs average 81°27° and lows 48°9°, with 1.4 in35 mm of precipitation in a typical August.
- Record high
- 100°38° (1903)
- Record low
- 23°−5° (1902)
- Heating degree days
- 50
- Cooling degree days
- 42
Koosharem in September
Highs average 75°24° and lows 39°4°, with 0.98 in25 mm of precipitation in a typical September.
- Record high
- 93°34° (2020)
- Record low
- 10°−12° (1900)
- Heating degree days
- 251
- Cooling degree days
- 3
Koosharem in OctoberThis month
Highs average 63°17° and lows 27°−3°, with 0.84 in21 mm of precipitation and 0.4 in1 cm of snow in a typical October.
- Record high
- 84°29° (1926)
- Record low
- −9°−23° (1971)
- Heating degree days
- 622
- Cooling degree days
- 0
Koosharem in November
Highs average 50°10° and lows 18°−8°, with 0.29 in7.4 mm of precipitation and 1.5 in3.8 cm of snow in a typical November.
- Record high
- 75°24° (1980)
- Record low
- −18°−28° (1896)
- Heating degree days
- 932
- Cooling degree days
- 0
Koosharem in December
Highs average 40°4° and lows 9°−13°, with 0.42 in11 mm of precipitation and 5 in12 cm of snow in a typical December.
- Record high
- 67°19° (1921)
- Record low
- −28°−33° (1924)
- Heating degree days
- 1255
- Cooling degree days
- 0