Philomath weather by month
What a typical year looks like in Philomath, Oregon: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Corvallis Water Bureau, 9 km from Philomath; records cover 1963–2025.
The year at a glance
- Precipitation a year
- 68.8 in1746 mm
- Snow a year
- 5 in13 cm
- Last spring freeze
- Apr 29
- First fall freeze
- Oct 26
- Heating degree days
- 5,665
- Cooling degree days
- 139
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 19°−7° (heating, 99%) and 95°35° (cooling, 1%).
Month by month
Philomath in January
Highs average 47°8° and lows 28°−2°, with 11.3 in286 mm of precipitation and 2 in5.1 cm of snow in a typical January.
- Record high
- 64°18° (2024)
- Record low
- 4°−16° (1979)
- Heating degree days
- 854
- Cooling degree days
- 0
Philomath in February
Highs average 51°11° and lows 28°−2°, with 8.4 in213 mm of precipitation and 1.7 in4.3 cm of snow in a typical February.
- Record high
- 72°22° (1968)
- Record low
- 2°−17° (1989)
- Heating degree days
- 708
- Cooling degree days
- 0
Philomath in March
Highs average 56°13° and lows 31°−1°, with 8.1 in206 mm of precipitation and 0.5 in1.3 cm of snow in a typical March.
- Record high
- 78°26° (2005)
- Record low
- 15°−9° (2019)
- Heating degree days
- 671
- Cooling degree days
- 0
Philomath in April
Highs average 61°16° and lows 33°1°, with 5.4 in138 mm of precipitation in a typical April.
- Record high
- 88°31° (2016)
- Record low
- 24°−4° (2009)
- Heating degree days
- 534
- Cooling degree days
- 0
Philomath in May
Highs average 69°21° and lows 39°4°, with 2.8 in71 mm of precipitation in a typical May.
- Record high
- 95°35° (2008)
- Record low
- 27°−3° (2017)
- Heating degree days
- 352
- Cooling degree days
- 4
Philomath in June
Highs average 74°23° and lows 43°6°, with 1.5 in38 mm of precipitation in a typical June.
- Record high
- 110°43° (2021)
- Record low
- 31°−1° (2020)
- Heating degree days
- 215
- Cooling degree days
- 13
Philomath in July
Highs average 82°28° and lows 46°8°, with 0.32 in8.1 mm of precipitation in a typical July.
- Record high
- 106°41° (2015)
- Record low
- 37°3° (2017)
- Heating degree days
- 82
- Cooling degree days
- 53
Philomath in August
Highs average 83°28° and lows 46°8°, with 0.42 in11 mm of precipitation in a typical August.
- Record high
- 107°42° (1972)
- Record low
- 35°2° (1973)
- Heating degree days
- 72
- Cooling degree days
- 52
Philomath in September
Highs average 77°25° and lows 42°6°, with 1.8 in44 mm of precipitation in a typical September.
- Record high
- 101°38° (2017)
- Record low
- 27°−3° (2019)
- Heating degree days
- 171
- Cooling degree days
- 17
Philomath in OctoberThis month
Highs average 65°18° and lows 36°2°, with 5 in127 mm of precipitation in a typical October.
- Record high
- 89°32° (2014)
- Record low
- 15°−9° (2019)
- Heating degree days
- 445
- Cooling degree days
- 0
Philomath in November
Highs average 53°12° and lows 31°−1°, with 10.4 in264 mm of precipitation and 0.2 in0.5 cm of snow in a typical November.
- Record high
- 70°21° (1969)
- Record low
- 11°−12° (1985)
- Heating degree days
- 699
- Cooling degree days
- 0
Philomath in December
Highs average 46°8° and lows 28°−2°, with 13.4 in341 mm of precipitation and 0.9 in2.3 cm of snow in a typical December.
- Record high
- 61°16° (2007)
- Record low
- 2°−17° (1972)
- Heating degree days
- 862
- Cooling degree days
- 0