Forest Grove (OR) monthly weather averages

Contents

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Forest Grove

Forest Grove average temperature chart (Celsius) Forest Grove average temperature chart (Fahrenheit)
Average monthly temperatures in Forest Grove (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 7.3 10 12.4 14.9 18.3 21.7 24.7 25.1 22.4 16.9 10.9 7.3
°F 45.1 50 54.2 58.8 64.9 71.1 76.5 77.3 72.3 62.4 51.5 45.2

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.

Forest Grove monthly rainfall chart (mm) Forest Grove monthly rainfall chart (inches)
Average monthly rainfall in Forest Grove (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 192 135 124 73 49 37 14 22 40 93 174 207
inches 7.5 5.3 4.9 2.9 1.9 1.5 0.5 0.9 1.6 3.6 6.9 8.1
Rainy days 19 17 18 15 13 9 5 6 9 13 19 20

Average annual rainfall in Forest Grove: 1082mm (426 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Forest Grove

Forest Grove average daily sunshine chart
Average daily sunshine Forest Grove
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 3.1 4.5 6.4 7.6 9.1 10 11.1 10 8.3 5.3 2.9 2.3

Day / night temperatures

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

Forest Grove average minimum / maximum temperatures (Celsius) Forest Grove average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Forest Grove (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 0.4 1.6 2.4 3.7 6.2 9 10.6 10.7 8.5 5.2 3 0.9
Max °C 7.5 10.2 12.6 15.2 18.6 22.1 25.1 25.5 22.8 17.2 11.1 7.5
Min °F 32.6 34.9 36.3 38.6 43.2 48.1 51 51.3 47.2 41.4 37.3 33.6
Max °F 39 42.6 45.5 48.9 54.3 59.9 64 64.6 60.1 52.2 44.6 39.6

Sea temperature

The graph below shows the average sea temperature.

Forest Grove average sea temperature chart (Celsius) Forest Grove average sea temperature chart (Fahrenheit)
Average sea temperature around Forest Grove in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 9.6 9.4 9.7 10.3 11.7 13.3 14.5 14.8 14.6 13.1 11.6 10.2
°F 49.3 49 49.4 50.5 53 55.9 58 58.7 58.3 55.6 52.9 50.4

Wind speed

The graph below shows the average wind speed.

Forest Grove average winspeed by month (km/h) Forest Grove average winspeed by month (mph)
Average wind speed in Forest Grove (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 15 15 14 13 13 13 13 12 12 11 14 15
mph 9 9 9 8 8 8 8 8 7 7 9 9

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.

Forest Grove relative humidity averages
Average relative humidity in Forest Grove
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
82% 80% 77% 75% 72% 70% 67% 69% 72% 80% 84% 84%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Forest Grove weather stats

Forest Grove weather statistics
Hottest month: August 25.1°C 77.2°F
Driest month: July 14mm 0.6ins
Sunniest month: July 11.1hrs
Coldest month: January 7.3°C 45.1°F
Wettest month: December 207mm 8.1ins
Warmest sea: August 14.8°C 58.6°F
Map showing location of Forest Grove (45.51984, -123.11066) Forest Grove map pin © Google

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