This page presents a long range weather forecast for Porthmadog in May as well as other months. You can quickly get a brief overview of the weather to expect in May on a daily basis.
The Porthmadog extended forecast data provided is based on the average values of previous years.
Long range weather forecast
Select a month and click on a day for more information:
Wednesday
May 1
11° / 4°
Thursday
May 2
12° / 5°
Friday
May 3
10° / 5°
Saturday
May 4
12° / 5°
Sunday
May 5
12° / 5°
Monday
May 6
11° / 5°
Tuesday
May 7
13° / 6°
Wednesday
May 8
13° / 7°
Thursday
May 9
14° / 8°
Friday
May 10
11° / 7°
Saturday
May 11
12° / 5°
Sunday
May 12
12° / 6°
Monday
May 13
12° / 6°
Tuesday
May 14
16° / 11°
Wednesday
May 15
17° / 11°
Thursday
May 16
17° / 10°
Friday
May 17
16° / 11°
Saturday
May 18
17° / 11°
Sunday
May 19
13° / 9°
Monday
May 20
15° / 12°
Tuesday
May 21
13° / 12°
Wednesday
May 22
12° / 11°
Thursday
May 23
12° / 8°
Friday
May 24
14° / 8°
Saturday
May 25
15° / 9°
Sunday
May 26
16° / 9°
Monday
May 27
13° / 10°
Tuesday
May 28
16° / 8°
Wednesday
May 29
16° / 7°
Thursday
May 30
17° / 8°
Friday
May 31
18° / 7°
Porthmadog 30 days weather forecast
Check out our estimated 30 days weather forecast for Porthmadog, this data is based on the average weather in Porthmadog in the last few years.
For a more accurate and detailed forecast, check out the 14 day weather for Porthmadog next to the desired date.