Glenns Ferry weather by month
What a typical year looks like in Glenns Ferry, Idaho: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Glenns Ferry, 2 km from Glenns Ferry; records cover 1905–2026.
The year at a glance
- Precipitation a year
- 10.6 in269 mm
- Snow a year
- Rare
- Last spring freeze
- May 4
- First fall freeze
- Oct 2
- Heating degree days
- 4,935
- Cooling degree days
- 1,173
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 6°−14° (heating, 99%) and 107°42° (cooling, 1%).
Month by month
Glenns Ferry in January
Highs average 44°7° and lows 25°−4°, with 1.5 in38 mm of precipitation in a typical January.
- Record high
- 85°29° (1905)
- Record low
- −23°−31° (1922)
- Heating degree days
- 952
- Cooling degree days
- 0
Glenns Ferry in February
Highs average 50°10° and lows 27°−3°, with 0.82 in21 mm of precipitation in a typical February.
- Record high
- 73°23° (1992)
- Record low
- −16°−27° (1933)
- Heating degree days
- 745
- Cooling degree days
- 0
Glenns Ferry in March
Highs average 60°16° and lows 32°0°, with 1 in26 mm of precipitation in a typical March.
- Record high
- 90°32° (1919)
- Record low
- 4°−16° (1989)
- Heating degree days
- 583
- Cooling degree days
- 0
Glenns Ferry in April
Highs average 68°20° and lows 38°3°, with 0.89 in23 mm of precipitation in a typical April.
- Record high
- 97°36° (1910)
- Record low
- 14°−10° (1936)
- Heating degree days
- 374
- Cooling degree days
- 6
Glenns Ferry in May
Highs average 79°26° and lows 46°8°, with 1.1 in27 mm of precipitation in a typical May.
- Record high
- 108°42° (2003)
- Record low
- 19°−7° (1909)
- Heating degree days
- 155
- Cooling degree days
- 62
Glenns Ferry in June
Highs average 88°31° and lows 53°11°, with 0.71 in18 mm of precipitation in a typical June.
- Record high
- 114°46° (2015)
- Record low
- 26°−3° (1914)
- Heating degree days
- 38
- Cooling degree days
- 196
Glenns Ferry in July
Highs average 99°37° and lows 59°15°, with 0.23 in5.8 mm of precipitation in a typical July.
- Record high
- 115°46° (1925)
- Record low
- 33°1° (1913)
- Heating degree days
- 2
- Cooling degree days
- 431
Glenns Ferry in August
Highs average 97°36° and lows 56°13°, with 0.28 in7.1 mm of precipitation in a typical August.
- Record high
- 112°44° (1905)
- Record low
- 31°−1° (1927)
- Heating degree days
- 6
- Cooling degree days
- 361
Glenns Ferry in September
Highs average 86°30° and lows 46°8°, with 0.44 in11 mm of precipitation in a typical September.
- Record high
- 109°43° (2022)
- Record low
- 15°−9° (1926)
- Heating degree days
- 74
- Cooling degree days
- 110
Glenns Ferry in OctoberThis month
Highs average 71°22° and lows 36°2°, with 0.98 in25 mm of precipitation in a typical October.
- Record high
- 96°36° (2010)
- Record low
- 8°−13° (2002)
- Heating degree days
- 359
- Cooling degree days
- 7
Glenns Ferry in November
Highs average 55°13° and lows 29°−2°, with 1.1 in28 mm of precipitation in a typical November.
- Record high
- 84°29° (1905)
- Record low
- −9°−23° (1985)
- Heating degree days
- 692
- Cooling degree days
- 0
Glenns Ferry in December
Highs average 44°7° and lows 25°−4°, with 1.6 in40 mm of precipitation in a typical December.
- Record high
- 75°24° (1933)
- Record low
- −28°−33° (1924)
- Heating degree days
- 955
- Cooling degree days
- 0