Coos Bay weather by month
What a typical year looks like in Coos Bay, Oregon: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at NORTH BEND SOUTHWEST OREGON REGIONAL AP, 4 km from Coos Bay; records cover 1902–2026.
The year at a glance
- Precipitation a year
- 59.1 in1502 mm
- Snow a year
- 0.2 in0.5 cm
- Last spring freeze
- Feb 27
- First fall freeze
- Nov 26
- Heating degree days
- 4,371
- Cooling degree days
- 7
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 30°−1° (heating, 99%) and 76°24° (cooling, 1%).
Month by month
Coos Bay in January
Highs average 54°12° and lows 41°5°, with 9.4 in240 mm of precipitation in a typical January.
- Record high
- 74°23° (1940)
- Record low
- 16°−9° (1930)
- Heating degree days
- 550
- Cooling degree days
- 0
Coos Bay in February
Highs average 54°12° and lows 41°5°, with 7 in178 mm of precipitation in a typical February.
- Record high
- 82°28° (1992)
- Record low
- 14°−10° (1989)
- Heating degree days
- 489
- Cooling degree days
- 0
Coos Bay in March
Highs average 55°13° and lows 42°5°, with 7.5 in190 mm of precipitation in a typical March.
- Record high
- 86°30° (1905)
- Record low
- 18°−8° (1908)
- Heating degree days
- 512
- Cooling degree days
- 0
Coos Bay in April
Highs average 57°14° and lows 44°7°, with 5.4 in137 mm of precipitation in a typical April.
- Record high
- 88°31° (1935)
- Record low
- 27°−3° (1908)
- Heating degree days
- 440
- Cooling degree days
- 0
Coos Bay in May
Highs average 61°16° and lows 48°9°, with 3 in75 mm of precipitation in a typical May.
- Record high
- 94°34° (1939)
- Record low
- 26°−3° (1912)
- Heating degree days
- 334
- Cooling degree days
- 0
Coos Bay in June
Highs average 64°18° and lows 51°11°, with 1.6 in39 mm of precipitation in a typical June.
- Record high
- 100°38° (1925)
- Record low
- 33°1° (2008)
- Heating degree days
- 230
- Cooling degree days
- 0
Coos Bay in July
Highs average 66°19° and lows 54°12°, with 0.35 in8.9 mm of precipitation in a typical July.
- Record high
- 98°37° (1905)
- Record low
- 35°2° (1920)
- Heating degree days
- 161
- Cooling degree days
- 1
Coos Bay in August
Highs average 67°20° and lows 54°12°, with 0.42 in11 mm of precipitation in a typical August.
- Record high
- 96°36° (1918)
- Record low
- 35°2° (1904)
- Heating degree days
- 143
- Cooling degree days
- 2
Coos Bay in September
Highs average 67°19° and lows 51°11°, with 1.6 in39 mm of precipitation in a typical September.
- Record high
- 94°34° (1919)
- Record low
- 30°−1° (1908)
- Heating degree days
- 183
- Cooling degree days
- 3
Coos Bay in OctoberThis month
Highs average 63°17° and lows 47°8°, with 4.2 in108 mm of precipitation in a typical October.
- Record high
- 95°35° (1991)
- Record low
- 26°−3° (1930)
- Heating degree days
- 314
- Cooling degree days
- 1
Coos Bay in November
Highs average 57°14° and lows 44°6°, with 8.3 in211 mm of precipitation in a typical November.
- Record high
- 78°26° (1923)
- Record low
- 20°−7° (1955)
- Heating degree days
- 446
- Cooling degree days
- 0
Coos Bay in December
Highs average 53°12° and lows 40°5°, with 10.5 in266 mm of precipitation and 0.2 in0.5 cm of snow in a typical December.
- Record high
- 70°21° (1980)
- Record low
- 13°−11° (1990)
- Heating degree days
- 569
- Cooling degree days
- 0