5 to 17°C
temperature
1637 hours
sunshine per day
752 mm
rain
121 days
dry
223 days
rain
21 days
snow

Climate of Porthmadog

Porthmadog has a oceanic climate. There is rainfall during all months of the year. The average annual temperature for Porthmadog is 11° degrees and there is about 753 mm of rain in a year. It is dry for 100 days a year with an average humidity of 88% and an UV-index of 3.

Climate averages for the whole year

  • Day: the average daily temperature during the day is between 5°C and 17°C
  • Night:the average nighttime temperature is between 2°C and 10°C
  • Sea temperature: the sea temperature is between 9°C and 16°C
  • Rain: it rains 223 days and there is a total of approximately 752 mm rainfall
  • Snow: it snows an average of 21 days per year
  • Sun hours: throughout the year there are 1637 sun hours
Maximum temperature: between 5°C and 17°C
Warmest month: 17°C in July
Coldest month: 5°C in January
Night temperature: between 2°C and 10°C
Sea temperature: between 9°C and 16°C
Dry days: 121 days
Days with rain: 223 days
Days with snow: 21 days
Total rain sum: 752 mm
Hours of sunshine: 1637 hours

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Temperature graph

This graph shows the average maximum temperature (red) and minimum temperature (blue) for Porthmadog.

Precipitation graph

This graph shows the average amount of rainfall per month for Porthmadog.

Climate table of Porthmadog

In this climate table you can see at a glance what the average weather per month is for Porthmadog. The data has been collected over a 30-year period, from which an average per month has been derived. From year to year the differences may be larger or smaller, but with this climate table you have a good idea of what the weather for Porthmadog might be like in a given month.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Day temp. (°C) 5 6 8 11 14 16 17 16 15 12 9 7
Night temp. (°C) 2 2 2 4 6 9 10 10 9 7 5 3
Water temp. (°C) 10 10 9 10 12 14 16 16 16 16 14 13
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Precipitation (mm) 69 55 78 51 47 54 55 49 47 69 87 91
Days with rain 18 15 16 17 19 17 21 21 18 19 21 21
Days with snow 6 6 3 1 - - - - - - 1 4
Dry days 7 7 12 12 12 13 10 10 12 12 8 6
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Sun hours per day 3 3 5 6 6 6 6 5 5 3 3 3
Wind force (Bft) 3 3 3 3 3 2 2 3 3 3 3 3
UV-index 1 2 2 2 4 4 3 4 3 3 2 2

Best time to visit Porthmadog

The best time to visit Porthmadog in Wales is June. In this period you have a mild temperature and little precipitation. The highest average temperature in Porthmadog is 17°C in July and the lowest is 5°C in January. The water temperature is 16°C at its highest and in other months it can be 9°C.

Climate of Porthmadog by month

What is the average climate in a given month for Porthmadog? Click on a month to see all monthly averages for sunshine, maximum and minimum temperatures, percent chance of rain per day, snowfall and number of rainy days.

Porthmadog weather experiences

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