The bar chart below shows the average monthly peak daytime temperatures at Portland
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | -0.3 | 1.8 | 8.5 | 15.6 | 21.8 | 27 | 28.8 | 27.7 | 24.4 | 17.5 | 9.9 | 2.5 |
°F | 31.4 | 35.3 | 47.4 | 60 | 71.2 | 80.6 | 83.9 | 81.9 | 75.9 | 63.5 | 49.8 | 36.6 |
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 | 58 | 54 | 79 | 97 | 97 | 102 | 103 | 82 | 75 | 65 | 79 | 70 |
inches | 2.3 | 2.1 | 3.1 | 3.8 | 3.8 | 4 | 4 | 3.2 | 2.9 | 2.6 | 3.1 | 2.7 |
Rainy days | 12 | 11 | 13 | 13 | 11 | 10 | 10 | 9 | 9 | 9 | 11 | 13 |
Average annual rainfall in Portland: 914.7mm (360.1 inches)
The bar chart below shows the average daily sunshine hours in Portland
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Hrs sunshine | 5 | 5.7 | 6.6 | 8.2 | 9.8 | 11.2 | 11 | 10.2 | 8.8 | 7 | 4.4 | 3.7 |
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 | -9.5 | -8.1 | -2 | 3.4 | 9.1 | 14.3 | 16.5 | 15 | 11.3 | 4.8 | 0.1 | -6 |
Max °C | -0.1 | 2.1 | 8.8 | 15.9 | 22.1 | 27.3 | 29.2 | 28.1 | 24.7 | 17.8 | 10.1 | 2.8 |
Min °F | 14.9 | 17.5 | 28.4 | 38 | 48.4 | 57.7 | 61.6 | 58.9 | 52.3 | 40.6 | 32.2 | 21.3 |
Max °F | 23.4 | 26.6 | 38.1 | 49.3 | 60.1 | 69.4 | 73 | 70.7 | 64.4 | 52.3 | 41.2 | 29.1 |
The graph below shows the average sea temperature.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 5.3 | 4.5 | 4.6 | 6.3 | 10.2 | 16.2 | 21.9 | 23.5 | 21.3 | 16.2 | 11.2 | 7.4 |
°F | 41.6 | 40 | 40.2 | 43.3 | 50.3 | 61.2 | 71.4 | 74.3 | 70.4 | 61.2 | 52.2 | 45.3 |
The graph below shows the average wind speed.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
km/h | 19 | 19 | 20 | 19 | 16 | 15 | 13 | 13 | 13 | 15 | 18 | 19 |
mph | 12 | 12 | 12 | 12 | 10 | 9 | 8 | 8 | 8 | 9 | 11 | 12 |
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 |
---|---|---|---|---|---|---|---|---|---|---|---|
75% | 73% | 71% | 65% | 66% | 67% | 70% | 73% | 73% | 71% | 75% | 78% |
Hottest month: | July | 28.8°C 83.8°F |
---|---|---|
Driest month: | February | 54mm 2.1ins |
Sunniest month: | July | 11hrs |
Coldest month: | January | -0.3°C 31.5°F |
Wettest month: | July | 103mm 4.1ins |
Warmest sea: | August | 23.5°C 74.3°F |