Genesee weather by month
What a typical year looks like in Genesee, Idaho: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Lewiston Airport, 21 km from Genesee; records cover 1881–2026.
The year at a glance
- Precipitation a year
- 12.9 in327 mm
- Snow a year
- 13 in32 cm
- Last spring freeze
- Apr 8
- First fall freeze
- Oct 25
- Heating degree days
- 4,980
- Cooling degree days
- 912
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 13°−11° (heating, 99%) and 102°39° (cooling, 1%).
Month by month
Genesee in January
Highs average 42°6° and lows 30°−1°, with 1.1 in29 mm of precipitation and 2.7 in6.9 cm of snow in a typical January.
- Record high
- 66°19° (1953)
- Record low
- −22°−30° (1950)
- Heating degree days
- 893
- Cooling degree days
- 0
Genesee in February
Highs average 47°8° and lows 32°0°, with 1 in26 mm of precipitation and 4 in10 cm of snow in a typical February.
- Record high
- 72°22° (1986)
- Record low
- −18°−28° (1884)
- Heating degree days
- 718
- Cooling degree days
- 0
Genesee in March
Highs average 55°13° and lows 36°2°, with 1.3 in33 mm of precipitation and 0.8 in2 cm of snow in a typical March.
- Record high
- 80°27° (1923)
- Record low
- 2°−17° (1955)
- Heating degree days
- 608
- Cooling degree days
- 0
Genesee in April
Highs average 62°17° and lows 41°5°, with 1.4 in37 mm of precipitation in a typical April.
- Record high
- 98°37° (1939)
- Record low
- 20°−7° (1966)
- Heating degree days
- 407
- Cooling degree days
- 2
Genesee in May
Highs average 72°22° and lows 48°9°, with 1.7 in43 mm of precipitation in a typical May.
- Record high
- 104°40° (1934)
- Record low
- 23°−5° (1954)
- Heating degree days
- 187
- Cooling degree days
- 34
Genesee in June
Highs average 79°26° and lows 54°12°, with 1.3 in32 mm of precipitation in a typical June.
- Record high
- 115°46° (2021)
- Record low
- 34°1° (1951)
- Heating degree days
- 61
- Cooling degree days
- 107
Genesee in July
Highs average 91°33° and lows 61°16°, with 0.47 in12 mm of precipitation in a typical July.
- Record high
- 117°47° (1939)
- Record low
- 41°5° (1895)
- Heating degree days
- 5
- Cooling degree days
- 341
Genesee in August
Highs average 90°32° and lows 60°16°, with 0.51 in13 mm of precipitation in a typical August.
- Record high
- 115°46° (1961)
- Record low
- 41°5° (1945)
- Heating degree days
- 6
- Cooling degree days
- 322
Genesee in September
Highs average 80°26° and lows 52°11°, with 0.6 in15 mm of precipitation in a typical September.
- Record high
- 108°42° (1944)
- Record low
- 27°−3° (1926)
- Heating degree days
- 76
- Cooling degree days
- 102
Genesee in OctoberThis month
Highs average 63°17° and lows 42°6°, with 1.1 in27 mm of precipitation in a typical October.
- Record high
- 94°34° (1943)
- Record low
- 15°−9° (2002)
- Heating degree days
- 392
- Cooling degree days
- 4
Genesee in November
Highs average 49°9° and lows 35°1°, with 1.2 in31 mm of precipitation and 1.3 in3.3 cm of snow in a typical November.
- Record high
- 77°25° (1999)
- Record low
- −3°−19° (1955)
- Heating degree days
- 702
- Cooling degree days
- 0
Genesee in December
Highs average 41°5° and lows 30°−1°, with 1.1 in29 mm of precipitation and 4 in10 cm of snow in a typical December.
- Record high
- 67°19° (1921)
- Record low
- −23°−31° (1919)
- Heating degree days
- 925
- Cooling degree days
- 0