The bar chart below shows the average monthly peak daytime temperatures at Chehalis
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 7 | 9.7 | 12.1 | 14.8 | 18.5 | 21.8 | 24.4 | 24.7 | 21.7 | 16.1 | 10.2 | 7.1 |
°F | 44.6 | 49.5 | 53.8 | 58.7 | 65.2 | 71.2 | 76 | 76.5 | 71 | 61 | 50.4 | 44.7 |
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.
The graph below shows the average rainfall and number of rainy days per month.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
mm | 192 | 140 | 131 | 91 | 61 | 53 | 23 | 36 | 58 | 113 | 189 | 198 |
inches | 7.6 | 5.5 | 5.1 | 3.6 | 2.4 | 2.1 | 0.9 | 1.4 | 2.3 | 4.4 | 7.4 | 7.8 |
Rainy days | 19 | 17 | 18 | 15 | 12 | 9 | 5 | 6 | 9 | 13 | 20 | 21 |
Average annual rainfall in Chehalis: 1206.766mm (475.1 inches)
The bar chart below shows the average daily sunshine hours in Chehalis
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Hrs sunshine | 2.8 | 4.3 | 6.1 | 7.4 | 8.8 | 9.5 | 10.8 | 9.7 | 8 | 5.1 | 2.8 | 2.2 |
The graph below shows the daily range of temperatures for each month.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Min °C | 0.5 | 1.3 | 2.1 | 3.5 | 6.3 | 9.1 | 10.9 | 11 | 8.6 | 5.4 | 3 | 1 |
Max °C | 7.2 | 9.9 | 12.4 | 15.1 | 18.8 | 22.1 | 24.8 | 25.1 | 22 | 16.4 | 10.4 | 7.2 |
Min °F | 32.8 | 34.3 | 35.7 | 38.3 | 43.3 | 48.4 | 51.5 | 51.7 | 47.5 | 41.7 | 37.4 | 33.8 |
Max °F | 38.8 | 42.1 | 45 | 48.7 | 54.5 | 60.1 | 64 | 64.4 | 59.5 | 51.6 | 44.1 | 39.4 |
The graph below shows the average sea temperature.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 8.6 | 8.5 | 8.7 | 9.2 | 10.3 | 11.7 | 12.9 | 13.4 | 13 | 11.6 | 10.2 | 9.1 |
°F | 47.5 | 47.3 | 47.7 | 48.6 | 50.6 | 53 | 55.2 | 56.2 | 55.5 | 53 | 50.4 | 48.4 |
The graph below shows the average wind speed.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
km/h | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 12 | 11 | 11 | 14 | 14 |
mph | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 7 | 7 | 7 | 9 | 9 |
A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.
The graph below shows the average relative humidity.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
---|---|---|---|---|---|---|---|---|---|---|---|
85% | 82% | 78% | 75% | 72% | 71% | 70% | 71% | 76% | 82% | 85% | 86% |
Hottest month: | August | 24.7°C 76.5°F |
---|---|---|
Driest month: | July | 23mm 0.9ins |
Sunniest month: | July | 10.8hrs |
Coldest month: | January | 7°C 44.6°F |
Wettest month: | December | 198mm 7.8ins |
Warmest sea: | August | 13.4°C 56.1°F |