Annual mean 10°C · wettest around December · prevailing wind SW
Warmest
18.8 °C
Coldest
5.9 °C
Wettest
37%
Windiest
7.0 m/s
Prevailing
SW
5.6 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Colwyn Bay over the whole year is 10°C. July is the hottest month, with highs of about 18°C; January is the coldest, with lows of about 5°C. Colwyn Bay has no sharply defined rainy season: the chance of rain on a given day runs from 18% in May, the driest month, to 35% in December, the wettest. Winds in Colwyn Bay are highest in February, averaging 6.0 m/s (22 km/h), and lightest in May, at 4.1 m/s (15 km/h). The prevailing wind is from the SW. The clearest skies in Colwyn Bay come in May, when the sky is typically 58% covered; December is the cloudiest month, at 73%.
Month by month Colwyn Bay climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
6°C
5°C
1°C
30%
71%
5.3 m/s
0
0
9
February
7°C
5°C
1°C
30%
68%
6.0 m/s
0
0
14
March
9°C
5°C
3°C
28%
67%
5.1 m/s
1
0
25
April
11°C
6°C
6°C
19%
60%
4.3 m/s
6
0
48
May
15°C
10°C
11°C
18%
58%
4.1 m/s
23
0
73
June
17°C
13°C
14°C
22%
64%
4.4 m/s
42
3
76
July
18°C
14°C
16°C
22%
67%
4.3 m/s
53
5
78
August
18°C
14°C
15°C
23%
64%
4.7 m/s
50
3
78
September
16°C
12°C
13°C
29%
66%
4.4 m/s
35
3
74
October
13°C
10°C
9°C
29%
67%
4.9 m/s
7
0
63
November
9°C
7°C
5°C
31%
71%
4.9 m/s
0
0
34
December
7°C
6°C
2°C
35%
73%
5.4 m/s
0
0
16
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Colwyn Bay weather by season
Year round, Colwyn Bay has days of about 6°C at their warmest in January, its coolest month, and 18°C in July, its warmest; the coolest hours of the day run from 5°C to 14°C through the year, and the average temperature over the year is 10°C around the clock. Rain is most likely around December and least likely around May. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Colwyn Bay weather in winterDecember to February
High 7°CLow 5°CRain 31%
Winter in Colwyn Bay has typical daily highs of about 7°C and lows of about 5°C, with a 31% chance of rain on a given day.
Colwyn Bay weather in springMarch to May
High 12°CLow 7°CRain 22%
Spring in Colwyn Bay has typical daily highs of about 12°C and lows of about 7°C, with a 22% chance of rain on a given day.
Colwyn Bay weather in summerJune to August
High 18°CLow 13°CRain 22%
Summer in Colwyn Bay has typical daily highs of about 18°C and lows of about 13°C, with a 22% chance of rain on a given day.
Colwyn Bay weather in autumnSeptember to November
High 13°CLow 10°CRain 29%
Autumn in Colwyn Bay has typical daily highs of about 13°C and lows of about 10°C, with a 29% chance of rain on a given day.
When is the rainy season in Colwyn Bay?
Colwyn Bay has no sharply defined rainy season: the chance of rain on a given day runs from 18% in May, the driest month, to 35% in December, the wettest.
What time of year is Colwyn Bay windiest?
Winds in Colwyn Bay are highest in February, averaging 6.0 m/s (22 km/h), and lightest in May, at 4.1 m/s (15 km/h). The prevailing wind is from the SW.
What is the average temperature in Colwyn Bay year round?
The average temperature in Colwyn Bay over the whole year is 10°C. July is the hottest month, with highs of about 18°C; January is the coldest, with lows of about 5°C.