Selfoss monthly weather averages
Average daytime temperature
The bar chart below shows the average monthly peak daytime temperatures at Selfoss
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 1.1 | 1.8 | 2.4 | 5.1 | 8.9 | 11.6 | 13.4 | 12.8 | 9.6 | 6 | 2.4 | 1.3 |
| °F | 33.9 | 35.3 | 36.3 | 41.2 | 48 | 52.8 | 56.1 | 55 | 49.3 | 42.9 | 36.4 | 34.3 |
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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mm | 103 | 100 | 101 | 84 | 67 | 82 | 80 | 99 | 100 | 120 | 106 | 106 |
| inches | 4 | 3.9 | 4 | 3.3 | 2.6 | 3.2 | 3.2 | 3.9 | 3.9 | 4.7 | 4.2 | 4.2 |
| Rainy days | 18 | 17 | 19 | 17 | 15 | 17 | 17 | 18 | 18 | 19 | 16 | 19 |
Average annual rainfall in Selfoss: 1190.1mm (468.5 inches)
Average daily sunshine
The bar chart below shows the average daily sunshine hours in Selfoss
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hrs sunshine | 0.6 | 1.4 | 3 | 4.7 | 3 | 0 | 3.2 | 5.6 | 4.1 | 2.6 | 1.4 | 0.5 |
Day / night temperatures
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 | -4 | -3 | -2.9 | -0.5 | 2.8 | 5.9 | 7.5 | 6.9 | 4.1 | 1.3 | -2.4 | -4 |
| Max °C | 1.2 | 2 | 2.5 | 5.3 | 9.1 | 11.7 | 13.6 | 12.9 | 9.8 | 6.2 | 2.6 | 1.4 |
| Min °F | 24.8 | 26.7 | 26.8 | 31.2 | 37 | 42.6 | 45.4 | 44.4 | 39.3 | 34.3 | 27.8 | 24.8 |
| Max °F | 29.5 | 31.1 | 31.6 | 36.3 | 42.6 | 47.8 | 50.9 | 49.8 | 44.4 | 38.7 | 32.2 | 29.7 |
Sea temperature
The graph below shows the average sea temperature.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 7.3 | 7.1 | 7 | 7.1 | 8 | 9.7 | 11.4 | 12 | 11 | 9.5 | 8.3 | 7.6 |
| °F | 45.1 | 44.8 | 44.6 | 44.8 | 46.4 | 49.5 | 52.4 | 53.6 | 51.8 | 49.1 | 46.9 | 45.7 |
Wind speed
The graph below shows the average wind speed.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| km/h | 26 | 26 | 25 | 23 | 20 | 19 | 18 | 19 | 21 | 22 | 23 | 25 |
| mph | 16 | 16 | 16 | 14 | 13 | 12 | 11 | 12 | 13 | 14 | 14 | 16 |
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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 82% | 82% | 80% | 81% | 80% | 83% | 84% | 85% | 83% | 83% | 82% | 82% |
Other monthly averages
Selfoss weather stats
| Hottest month: | July | 13.4°C 56.1°F |
|---|---|---|
| Driest month: | May | 67mm 2.6ins |
| Sunniest month: | May | 3hrs |
| Coldest month: | January | 1.1°C 34°F |
| Wettest month: | October | 120mm 4.7ins |
| Warmest sea: | August | 12°C 53.6°F |
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