Annual mean 11°C · wettest around January · prevailing wind NW
Warmest
19.9 °C
Coldest
9.0 °C
Wettest
30%
Windiest
5.2 m/s
Prevailing
NW
3.7 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Coos Bay over the whole year is 11°C. August is the hottest month, with highs of about 20°C; February is the coldest, with lows of about 5°C. The rainy (wet) season in Coos Bay runs from October to April, peaking in January with a 30% chance of rain on a given day. The dry season is May to September; July is the driest month, at 4%. Winds in Coos Bay are highest in July, averaging 3.4 m/s (12 km/h), and lightest in October, at 2.3 m/s (8 km/h). The prevailing wind is from the NW. The clearest skies in Coos Bay come in August, when the sky is typically 45% covered; February is the cloudiest month, at 64%.
Month by month Coos Bay climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
10°C
6°C
6°C
30%
62%
2.6 m/s
2
0
48
February
9°C
5°C
6°C
29%
64%
2.7 m/s
3
0
43
March
11°C
5°C
7°C
29%
64%
2.8 m/s
4
0
49
April
13°C
7°C
9°C
22%
58%
3.0 m/s
11
0
62
May
15°C
9°C
11°C
13%
58%
3.2 m/s
19
2
79
June
17°C
12°C
14°C
8%
49%
3.3 m/s
37
5
80
July
19°C
13°C
16°C
4%
45%
3.4 m/s
52
11
77
August
20°C
13°C
18°C
4%
45%
2.9 m/s
68
12
79
September
19°C
12°C
17°C
8%
46%
2.5 m/s
65
6
83
October
16°C
9°C
13°C
18%
52%
2.3 m/s
41
1
85
November
12°C
7°C
9°C
25%
60%
2.3 m/s
13
0
67
December
10°C
6°C
6°C
29%
60%
2.5 m/s
1
0
46
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Coos Bay weather by season
Year round, Coos Bay has days of about 9°C at their warmest in February, its coolest month, and 20°C in August, its warmest; the coolest hours of the day run from 5°C to 13°C through the year, and the average temperature over the year is 11°C around the clock. Rain is most likely around January and least likely around July. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Coos Bay weather in winterDecember to February
High 10°CLow 6°CRain 29%
Winter in Coos Bay has typical daily highs of about 10°C and lows of about 6°C, with a 29% chance of rain on a given day.
Coos Bay weather in springMarch to May
High 13°CLow 7°CRain 21%
Spring in Coos Bay has typical daily highs of about 13°C and lows of about 7°C, with a 21% chance of rain on a given day.
Coos Bay weather in summerJune to August
High 18°CLow 13°CRain 5%
Summer in Coos Bay has typical daily highs of about 18°C and lows of about 13°C, with a 5% chance of rain on a given day.
Coos Bay weather in autumnSeptember to November
High 15°CLow 9°CRain 17%
Autumn in Coos Bay has typical daily highs of about 15°C and lows of about 9°C, with a 17% chance of rain on a given day.
When is the rainy season in Coos Bay?
The rainy (wet) season in Coos Bay runs from October to April, peaking in January with a 30% chance of rain on a given day. The dry season is May to September; July is the driest month, at 4%.
What time of year is Coos Bay windiest?
Winds in Coos Bay are highest in July, averaging 3.4 m/s (12 km/h), and lightest in October, at 2.3 m/s (8 km/h). The prevailing wind is from the NW.
What is the average temperature in Coos Bay year round?
The average temperature in Coos Bay over the whole year is 11°C. August is the hottest month, with highs of about 20°C; February is the coldest, with lows of about 5°C.