The bar chart below shows the average monthly peak daytime temperatures at Porthmadog
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 6.5 | 6.5 | 8.2 | 10.7 | 14 | 16.6 | 18 | 17.9 | 15.9 | 13.3 | 9.3 | 7.6 |
°F | 43.8 | 43.6 | 46.7 | 51.3 | 57.1 | 61.8 | 64.5 | 64.3 | 60.6 | 55.9 | 48.8 | 45.6 |
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 | 180 | 122 | 141 | 99 | 96 | 98 | 101 | 135 | 151 | 184 | 198 | 202 |
inches | 7.1 | 4.8 | 5.6 | 3.9 | 3.8 | 3.9 | 4 | 5.3 | 5.9 | 7.2 | 7.8 | 8 |
Rainy days | 21 | 16 | 19 | 15 | 16 | 15 | 14 | 16 | 17 | 20 | 21 | 21 |
Average annual rainfall in Porthmadog: 1756.134mm (691.4 inches)
The bar chart below shows the average daily sunshine hours in Porthmadog
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Hrs sunshine | 1.5 | 2.8 | 3.6 | 5.4 | 6.7 | 6.6 | 5.9 | 5.6 | 4.5 | 3.2 | 2 | 1.3 |
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 | 1.6 | 1.2 | 2.3 | 3.7 | 6.3 | 9.1 | 11 | 10.9 | 9.4 | 7.4 | 4 | 2.5 |
Max °C | 6.7 | 6.6 | 8.3 | 10.9 | 14.2 | 16.8 | 18.2 | 18.1 | 16.1 | 13.5 | 9.5 | 7.7 |
Min °F | 34.8 | 34.2 | 36.1 | 38.7 | 43.3 | 48.3 | 51.8 | 51.6 | 48.8 | 45.2 | 39.1 | 36.5 |
Max °F | 39.4 | 39 | 41.5 | 45.1 | 50.4 | 55.2 | 58.3 | 58.1 | 54.9 | 50.7 | 44.1 | 41.2 |
The graph below shows the average sea temperature.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 8.9 | 8 | 7.9 | 8.8 | 10.7 | 13 | 15 | 15.9 | 15.6 | 14.3 | 12.5 | 10.5 |
°F | 48 | 46.4 | 46.1 | 47.8 | 51.2 | 55.4 | 59 | 60.6 | 60.1 | 57.8 | 54.4 | 50.9 |
The graph below shows the average wind speed.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
km/h | 23 | 21 | 21 | 18 | 17 | 16 | 16 | 17 | 19 | 21 | 22 | 23 |
mph | 14 | 13 | 13 | 11 | 11 | 10 | 10 | 10 | 12 | 13 | 14 | 14 |
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 |
---|---|---|---|---|---|---|---|---|---|---|---|
88% | 87% | 86% | 83% | 81% | 83% | 85% | 86% | 87% | 88% | 89% | 90% |
Hottest month: | July | 18°C 64.4°F |
---|---|---|
Driest month: | May | 96mm 3.8ins |
Sunniest month: | May | 6.7hrs |
Coldest month: | February | 6.5°C 43.7°F |
Wettest month: | December | 202mm 8ins |
Warmest sea: | August | 15.9°C 60.6°F |