Rupert weather by month
What a typical year looks like in Rupert, Idaho: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Burley Municipal Airport, 11 km from Rupert; records cover 1917–2026.
The year at a glance
- Precipitation a year
- 10.3 in262 mm
- Snow a year
- Rare
- Last spring freeze
- May 2
- First fall freeze
- Oct 5
- Heating degree days
- 6,285
- Cooling degree days
- 492
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 98°37° (cooling, 1%).
Month by month
Rupert in January
Highs average 37°3° and lows 21°−6°, with 1.1 in27 mm of precipitation in a typical January.
- Record high
- 64°18° (2003)
- Record low
- −35°−37° (1922)
- Heating degree days
- 1110
- Cooling degree days
- 0
Rupert in February
Highs average 43°6° and lows 24°−5°, with 0.69 in18 mm of precipitation in a typical February.
- Record high
- 72°22° (1995)
- Record low
- −29°−34° (1933)
- Heating degree days
- 888
- Cooling degree days
- 0
Rupert in March
Highs average 53°12° and lows 30°−1°, with 1 in26 mm of precipitation in a typical March.
- Record high
- 80°27° (2026)
- Record low
- −5°−21° (1922)
- Heating degree days
- 730
- Cooling degree days
- 0
Rupert in April
Highs average 60°15° and lows 35°2°, with 1.1 in28 mm of precipitation in a typical April.
- Record high
- 89°32° (1994)
- Record low
- 9°−13° (1936)
- Heating degree days
- 536
- Cooling degree days
- 0
Rupert in May
Highs average 69°21° and lows 43°6°, with 1.7 in43 mm of precipitation in a typical May.
- Record high
- 97°36° (1954)
- Record low
- 18°−8° (1946)
- Heating degree days
- 294
- Cooling degree days
- 11
Rupert in June
Highs average 78°26° and lows 49°9°, with 0.78 in20 mm of precipitation in a typical June.
- Record high
- 102°39° (1990)
- Record low
- 27°−3° (1920)
- Heating degree days
- 108
- Cooling degree days
- 60
Rupert in July
Highs average 88°31° and lows 55°13°, with 0.26 in6.6 mm of precipitation in a typical July.
- Record high
- 107°42° (1934)
- Record low
- 33°1° (1981)
- Heating degree days
- 10
- Cooling degree days
- 212
Rupert in August
Highs average 87°30° and lows 53°12°, with 0.4 in10 mm of precipitation in a typical August.
- Record high
- 105°41° (1990)
- Record low
- 31°−1° (1965)
- Heating degree days
- 22
- Cooling degree days
- 174
Rupert in September
Highs average 77°25° and lows 45°7°, with 0.66 in17 mm of precipitation in a typical September.
- Record high
- 101°38° (2022)
- Record low
- 11°−12° (1926)
- Heating degree days
- 160
- Cooling degree days
- 34
Rupert in OctoberThis month
Highs average 63°17° and lows 36°2°, with 0.8 in20 mm of precipitation in a typical October.
- Record high
- 91°33° (1992)
- Record low
- 6°−14° (2019)
- Heating degree days
- 492
- Cooling degree days
- 1
Rupert in November
Highs average 48°9° and lows 27°−3°, with 0.8 in20 mm of precipitation in a typical November.
- Record high
- 79°26° (1962)
- Record low
- −14°−26° (1955)
- Heating degree days
- 824
- Cooling degree days
- 0
Rupert in December
Highs average 37°3° and lows 21°−6°, with 1.1 in27 mm of precipitation in a typical December.
- Record high
- 68°20° (1939)
- Record low
- −28°−33° (1924)
- Heating degree days
- 1111
- Cooling degree days
- 0