Cathlamet (WA) monthly weather averages

Contents

Average daytime temperature

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

Cathlamet average temperature chart (Celsius) Cathlamet average temperature chart (Fahrenheit)
Average monthly temperatures in Cathlamet (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 7.6 9.8 11.7 13.8 17 19.7 22.1 22.7 20.9 16.1 10.8 7.7
°F 45.6 49.7 53.1 56.9 62.6 67.5 71.7 72.8 69.6 61 51.4 45.8

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.

Cathlamet monthly rainfall chart (mm) Cathlamet monthly rainfall chart (inches)
Average monthly rainfall in Cathlamet (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 244 185 170 116 74 61 28 37 67 138 235 254
inches 9.6 7.3 6.7 4.6 2.9 2.4 1.1 1.5 2.6 5.4 9.2 10
Rainy days 20 18 19 17 14 11 6 7 10 14 20 21

Average annual rainfall in Cathlamet: 1532.433mm (603.3 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Cathlamet

Cathlamet average daily sunshine chart
Average daily sunshine Cathlamet
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 2.9 4.2 6 7.3 8.7 9.4 10.5 9.4 7.9 5.1 2.8 2.3

Day / night temperatures

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

Cathlamet average minimum / maximum temperatures (Celsius) Cathlamet average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Cathlamet (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 0.7 1.6 2.1 3.3 6 8.6 10.3 10.5 8.2 5.2 2.9 1.2
Max °C 7.8 10.1 12 14.1 17.3 20 22.4 23 21.2 16.4 11 7.9
Min °F 33.2 34.8 35.7 37.9 42.7 47.5 50.5 50.8 46.8 41.4 37.1 34.1
Max °F 39.6 42.4 44.6 47.7 52.9 57.7 61.3 62.1 58.5 51.4 44.4 40.1

Sea temperature

The graph below shows the average sea temperature.

Cathlamet average sea temperature chart (Celsius) Cathlamet average sea temperature chart (Fahrenheit)
Average sea temperature around Cathlamet in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 9.1 9 9.3 10 11.6 13.2 14.4 14.7 14.4 12.8 11.2 9.8
°F 48.4 48.2 48.7 50.1 52.8 55.8 57.9 58.5 57.9 55 52.1 49.6

Wind speed

The graph below shows the average wind speed.

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

Cathlamet relative humidity averages
Average relative humidity in Cathlamet
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
84% 82% 80% 77% 76% 75% 74% 76% 78% 83% 84% 85%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Cathlamet weather stats

Cathlamet weather statistics
Hottest month: August 22.7°C 72.9°F
Driest month: July 28mm 1.1ins
Sunniest month: July 10.5hrs
Coldest month: January 7.6°C 45.7°F
Wettest month: December 254mm 10ins
Warmest sea: August 14.7°C 58.5°F
Map showing location of Cathlamet (46.20317, -123.38318) Cathlamet map pin © Google

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