Fossil weather by month
What a typical year looks like in Fossil, Oregon: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Fossil, 0 km from Fossil; records cover 1945–2026.
The year at a glance
- Precipitation a year
- 15.1 in382 mm
- Snow a year
- Rare
- Last spring freeze
- May 19
- First fall freeze
- Oct 1
- Heating degree days
- 6,565
- Cooling degree days
- 174
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 7°−14° (heating, 99%) and 98°37° (cooling, 1%).
Month by month
Fossil in January
Highs average 42°6° and lows 26°−3°, with 1.4 in36 mm of precipitation in a typical January.
- Record high
- 70°21° (2015)
- Record low
- −26°−32° (1957)
- Heating degree days
- 961
- Cooling degree days
- 0
Fossil in February
Highs average 46°8° and lows 26°−4°, with 1.2 in30 mm of precipitation in a typical February.
- Record high
- 76°24° (1995)
- Record low
- −22°−30° (1950)
- Heating degree days
- 818
- Cooling degree days
- 0
Fossil in March
Highs average 52°11° and lows 28°−2°, with 1.5 in38 mm of precipitation in a typical March.
- Record high
- 78°26° (1972)
- Record low
- 2°−17° (1955)
- Heating degree days
- 775
- Cooling degree days
- 0
Fossil in April
Highs average 58°14° and lows 31°0°, with 1.4 in34 mm of precipitation in a typical April.
- Record high
- 87°31° (1946)
- Record low
- 12°−11° (1966)
- Heating degree days
- 612
- Cooling degree days
- 0
Fossil in May
Highs average 66°19° and lows 37°3°, with 2.1 in54 mm of precipitation in a typical May.
- Record high
- 100°38° (2006)
- Record low
- 15°−9° (1964)
- Heating degree days
- 412
- Cooling degree days
- 3
Fossil in June
Highs average 73°23° and lows 42°5°, with 1.3 in34 mm of precipitation in a typical June.
- Record high
- 108°42° (2021)
- Record low
- 25°−4° (1976)
- Heating degree days
- 242
- Cooling degree days
- 15
Fossil in July
Highs average 85°29° and lows 46°8°, with 0.44 in11 mm of precipitation in a typical July.
- Record high
- 111°44° (2003)
- Record low
- 25°−4° (1971)
- Heating degree days
- 80
- Cooling degree days
- 80
Fossil in August
Highs average 84°29° and lows 45°7°, with 0.58 in15 mm of precipitation in a typical August.
- Record high
- 106°41° (1998)
- Record low
- 28°−2° (1957)
- Heating degree days
- 83
- Cooling degree days
- 66
Fossil in September
Highs average 74°24° and lows 40°4°, with 0.55 in14 mm of precipitation in a typical September.
- Record high
- 100°38° (2003)
- Record low
- 18°−8° (1965)
- Heating degree days
- 247
- Cooling degree days
- 10
Fossil in OctoberThis month
Highs average 63°17° and lows 33°1°, with 1.5 in37 mm of precipitation in a typical October.
- Record high
- 98°37° (1975)
- Record low
- 3°−16° (1991)
- Heating degree days
- 524
- Cooling degree days
- 0
Fossil in November
Highs average 48°9° and lows 28°−2°, with 1.4 in35 mm of precipitation in a typical November.
- Record high
- 75°24° (1965)
- Record low
- −16°−27° (1985)
- Heating degree days
- 802
- Cooling degree days
- 0
Fossil in December
Highs average 41°5° and lows 24°−4°, with 1.8 in45 mm of precipitation in a typical December.
- Record high
- 70°21° (2021)
- Record low
- −24°−31° (1990)
- Heating degree days
- 1009
- Cooling degree days
- 0