Bloomington weather by month
What a typical year looks like in Bloomington, Idaho: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Lifton Pumping Station, 11 km from Bloomington; records cover 1919–2026.
The year at a glance
- Precipitation a year
- 11.3 in287 mm
- Snow a year
- 37 in95 cm
- Last spring freeze
- May 19
- First fall freeze
- Sep 13
- Heating degree days
- 8,857
- Cooling degree days
- 133
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −12°−24° (heating, 99%) and 90°32° (cooling, 1%).
Month by month
Bloomington in January
Highs average 29°−2° and lows 8°−14°, with 0.8 in20 mm of precipitation and 9 in23 cm of snow in a typical January.
- Record high
- 52°11° (1990)
- Record low
- −40° (1949)
- Heating degree days
- 1454
- Cooling degree days
- 0
Bloomington in February
Highs average 31°0° and lows 8°−13°, with 0.82 in21 mm of precipitation and 9 in22 cm of snow in a typical February.
- Record high
- 55°13° (1991)
- Record low
- −41° (1985)
- Heating degree days
- 1271
- Cooling degree days
- 0
Bloomington in March
Highs average 40°5° and lows 18°−8°, with 0.83 in21 mm of precipitation and 4 in10 cm of snow in a typical March.
- Record high
- 72°22° (2026)
- Record low
- −29°−34° (1922)
- Heating degree days
- 1113
- Cooling degree days
- 0
Bloomington in April
Highs average 50°10° and lows 29°−2°, with 1.1 in28 mm of precipitation and 2.7 in6.9 cm of snow in a typical April.
- Record high
- 77°25° (2007)
- Record low
- −11°−24° (1936)
- Heating degree days
- 765
- Cooling degree days
- 0
Bloomington in May
Highs average 61°16° and lows 38°3°, with 1.8 in46 mm of precipitation and 0.2 in0.5 cm of snow in a typical May.
- Record high
- 90°32° (2003)
- Record low
- 19°−7° (1965)
- Heating degree days
- 492
- Cooling degree days
- 1
Bloomington in June
Highs average 71°22° and lows 45°7°, with 0.92 in23 mm of precipitation in a typical June.
- Record high
- 94°34° (1988)
- Record low
- 26°−3° (1920)
- Heating degree days
- 218
- Cooling degree days
- 11
Bloomington in July
Highs average 81°27° and lows 51°11°, with 0.57 in14 mm of precipitation in a typical July.
- Record high
- 99°37° (1931)
- Record low
- 29°−2° (1987)
- Heating degree days
- 46
- Cooling degree days
- 76
Bloomington in August
Highs average 80°27° and lows 48°9°, with 0.76 in19 mm of precipitation in a typical August.
- Record high
- 96°36° (2000)
- Record low
- 30°−1° (1964)
- Heating degree days
- 76
- Cooling degree days
- 43
Bloomington in September
Highs average 70°21° and lows 39°4°, with 1.1 in28 mm of precipitation and 0.1 in0.3 cm of snow in a typical September.
- Record high
- 91°33° (2022)
- Record low
- 14°−10° (1926)
- Heating degree days
- 314
- Cooling degree days
- 2
Bloomington in OctoberThis month
Highs average 56°13° and lows 30°−1°, with 1.1 in28 mm of precipitation and 1.1 in2.8 cm of snow in a typical October.
- Record high
- 81°27° (1992)
- Record low
- −5°−21° (2019)
- Heating degree days
- 690
- Cooling degree days
- 0
Bloomington in November
Highs average 41°5° and lows 20°−7°, with 0.76 in19 mm of precipitation and 4 in10 cm of snow in a typical November.
- Record high
- 66°19° (2008)
- Record low
- −18°−28° (1955)
- Heating degree days
- 1036
- Cooling degree days
- 0
Bloomington in December
Highs average 30°−1° and lows 10°−12°, with 0.75 in19 mm of precipitation and 7 in18 cm of snow in a typical December.
- Record high
- 60°16° (1939)
- Record low
- −33°−36° (1978)
- Heating degree days
- 1382
- Cooling degree days
- 0