Knappa weather by month
What a typical year looks like in Knappa, Oregon: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Astoria Airport (port Of), 23 km from Knappa; records cover 1887–2026.
The year at a glance
- Precipitation a year
- 70.3 in1785 mm
- Snow a year
- Rare
- Last spring freeze
- Mar 27
- First fall freeze
- Nov 4
- Heating degree days
- 4,960
- Cooling degree days
- 22
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 27°−3° (heating, 99%) and 82°28° (cooling, 1%).
Month by month
Knappa in January
Highs average 49°10° and lows 38°3°, with 10.6 in269 mm of precipitation in a typical January.
- Record high
- 70°21° (1940)
- Record low
- 10°−12° (1888)
- Heating degree days
- 659
- Cooling degree days
- 0
Knappa in February
Highs average 51°11° and lows 37°3°, with 7.2 in182 mm of precipitation in a typical February.
- Record high
- 72°22° (1968)
- Record low
- 9°−13° (1989)
- Heating degree days
- 584
- Cooling degree days
- 0
Knappa in March
Highs average 53°12° and lows 39°4°, with 7.9 in201 mm of precipitation in a typical March.
- Record high
- 80°27° (1926)
- Record low
- 22°−6° (1971)
- Heating degree days
- 589
- Cooling degree days
- 0
Knappa in April
Highs average 56°13° and lows 42°5°, with 5.8 in147 mm of precipitation in a typical April.
- Record high
- 86°30° (2023)
- Record low
- 26°−3° (1927)
- Heating degree days
- 489
- Cooling degree days
- 0
Knappa in May
Highs average 61°16° and lows 46°8°, with 3.4 in86 mm of precipitation in a typical May.
- Record high
- 93°34° (2008)
- Record low
- 30°−1° (1954)
- Heating degree days
- 361
- Cooling degree days
- 2
Knappa in June
Highs average 64°18° and lows 51°10°, with 2.3 in58 mm of precipitation in a typical June.
- Record high
- 101°38° (2021)
- Record low
- 37°3° (1980)
- Heating degree days
- 233
- Cooling degree days
- 2
Knappa in July
Highs average 67°20° and lows 54°12°, with 0.83 in21 mm of precipitation in a typical July.
- Record high
- 101°38° (1942)
- Record low
- 37°3° (1930)
- Heating degree days
- 140
- Cooling degree days
- 5
Knappa in August
Highs average 69°20° and lows 54°12°, with 1.1 in28 mm of precipitation in a typical August.
- Record high
- 98°37° (2016)
- Record low
- 39°4° (1973)
- Heating degree days
- 122
- Cooling degree days
- 7
Knappa in September
Highs average 68°20° and lows 51°10°, with 2.7 in68 mm of precipitation in a typical September.
- Record high
- 95°35° (1972)
- Record low
- 33°1° (1970)
- Heating degree days
- 185
- Cooling degree days
- 6
Knappa in OctoberThis month
Highs average 61°16° and lows 45°7°, with 6.7 in171 mm of precipitation in a typical October.
- Record high
- 85°29° (1980)
- Record low
- 26°−3° (1971)
- Heating degree days
- 378
- Cooling degree days
- 0
Knappa in November
Highs average 54°12° and lows 40°5°, with 11.1 in281 mm of precipitation in a typical November.
- Record high
- 73°23° (1907)
- Record low
- 15°−9° (1955)
- Heating degree days
- 543
- Cooling degree days
- 0
Knappa in December
Highs average 49°9° and lows 38°3°, with 10.7 in271 mm of precipitation in a typical December.
- Record high
- 65°18° (2024)
- Record low
- 6°−14° (1972)
- Heating degree days
- 677
- Cooling degree days
- 0