Coos Bay (OR) monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Coos Bay

Coos Bay average temperature chart (Celsius) Coos Bay average temperature chart (Fahrenheit)
Average monthly temperatures in Coos Bay (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 10.9 12.5 13.1 14.6 16.9 19.6 21.6 21.9 20.8 17.3 13.1 10.8
°F 51.6 54.4 55.6 58.2 62.4 67.3 70.9 71.4 69.5 63.2 55.6 51.4

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Coos Bay monthly rainfall chart (mm) Coos Bay monthly rainfall chart (inches)
Average monthly rainfall in Coos Bay (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 250 200 201 119 75 41 12 24 46 117 262 274
inches 9.8 7.9 7.9 4.7 2.9 1.6 0.5 1 1.8 4.6 10.3 10.8
Rainy days 17 15 17 14 10 7 4 5 6 11 18 18

Average annual rainfall in Coos Bay: 1539.267mm (606 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Coos Bay

Coos Bay average daily sunshine chart
Average daily sunshine Coos Bay
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 3.4 4.6 6.4 8 9.6 10.8 11.5 10.4 9.2 6 3.3 2.9

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Coos Bay average minimum / maximum temperatures (Celsius) Coos Bay average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Coos Bay (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 3.8 4.4 4.5 5 7.1 9.6 10.8 11.1 9.7 7.7 6.1 4.1
Max °C 11.1 12.7 13.4 14.8 17.1 19.9 21.9 22.2 21.1 17.6 13.3 11
Min °F 38.8 39.8 40 41 44.8 49.2 51.4 51.9 49.5 45.8 43 39.3
Max °F 45.3 47.3 48 49.8 53.8 58.5 61.3 61.9 59.7 54.7 49.5 45.5

Sea temperature

The graph below shows the average sea temperature.

Coos Bay average sea temperature chart (Celsius) Coos Bay average sea temperature chart (Fahrenheit)
Average sea temperature around Coos Bay in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 10.3 10.2 10.3 10.7 11.9 13.3 14.3 14.6 14.4 13.2 12 10.9
°F 50.6 50.4 50.6 51.3 53.4 56 57.7 58.2 57.9 55.8 53.6 51.6

Wind speed

The graph below shows the average wind speed.

Coos Bay average winspeed by month (km/h) Coos Bay average winspeed by month (mph)
Average wind speed in Coos Bay (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 13 13 14 13 13 13 13 12 12 11 12 13
mph 8 8 9 8 8 8 8 8 7 7 8 8

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Coos Bay relative humidity averages
Average relative humidity in Coos Bay
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
87% 84% 80% 77% 75% 72% 67% 69% 72% 80% 87% 88%