Altamont weather by month
What a typical year looks like in Altamont, Oregon: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Klamath Falls Ag Sta, 5 km from Altamont; records cover 1948–2026.
The year at a glance
- Precipitation a year
- 11.1 in283 mm
- Snow a year
- Rare
- Last spring freeze
- Jun 10
- First fall freeze
- Sep 18
- Heating degree days
- 6,709
- Cooling degree days
- 216
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 4°−16° (heating, 99%) and 95°35° (cooling, 1%).
Month by month
Altamont in January
Highs average 42°5° and lows 22°−6°, with 1.5 in38 mm of precipitation in a typical January.
- Record high
- 67°19° (2024)
- Record low
- −25°−32° (1962)
- Heating degree days
- 1038
- Cooling degree days
- 0
Altamont in February
Highs average 46°8° and lows 24°−5°, with 1.1 in28 mm of precipitation in a typical February.
- Record high
- 67°19° (1986)
- Record low
- −14°−26° (2025)
- Heating degree days
- 843
- Cooling degree days
- 0
Altamont in March
Highs average 52°11° and lows 27°−3°, with 1 in26 mm of precipitation in a typical March.
- Record high
- 77°25° (2026)
- Record low
- 2°−17° (2012)
- Heating degree days
- 794
- Cooling degree days
- 0
Altamont in April
Highs average 58°14° and lows 29°−2°, with 1.1 in27 mm of precipitation in a typical April.
- Record high
- 85°29° (1987)
- Record low
- 11°−12° (1982)
- Heating degree days
- 646
- Cooling degree days
- 0
Altamont in May
Highs average 67°20° and lows 36°2°, with 1 in26 mm of precipitation in a typical May.
- Record high
- 94°34° (1986)
- Record low
- 17°−8° (2008)
- Heating degree days
- 415
- Cooling degree days
- 3
Altamont in June
Highs average 76°25° and lows 41°5°, with 0.66 in17 mm of precipitation in a typical June.
- Record high
- 103°39° (2021)
- Record low
- 23°−5° (2001)
- Heating degree days
- 207
- Cooling degree days
- 21
Altamont in July
Highs average 86°30° and lows 48°9°, with 0.22 in5.6 mm of precipitation in a typical July.
- Record high
- 103°39° (2022)
- Record low
- 30°−1° (1966)
- Heating degree days
- 41
- Cooling degree days
- 104
Altamont in August
Highs average 85°29° and lows 47°8°, with 0.28 in7.1 mm of precipitation in a typical August.
- Record high
- 102°39° (1981)
- Record low
- 30°−1° (1960)
- Heating degree days
- 54
- Cooling degree days
- 74
Altamont in September
Highs average 78°25° and lows 39°4°, with 0.3 in7.6 mm of precipitation in a typical September.
- Record high
- 100°38° (1998)
- Record low
- 20°−7° (1950)
- Heating degree days
- 216
- Cooling degree days
- 14
Altamont in OctoberThis month
Highs average 64°18° and lows 31°−1°, with 0.74 in19 mm of precipitation in a typical October.
- Record high
- 89°32° (1996)
- Record low
- 8°−13° (2002)
- Heating degree days
- 544
- Cooling degree days
- 0
Altamont in November
Highs average 49°10° and lows 25°−4°, with 1.4 in35 mm of precipitation in a typical November.
- Record high
- 73°23° (1996)
- Record low
- −7°−22° (1955)
- Heating degree days
- 840
- Cooling degree days
- 0
Altamont in December
Highs average 40°5° and lows 21°−6°, with 1.8 in46 mm of precipitation in a typical December.
- Record high
- 62°17° (1950)
- Record low
- −20°−29° (2013)
- Heating degree days
- 1071
- Cooling degree days
- 0