Annual mean 11°C · wettest around December · prevailing wind SW
Warmest
20.2 °C
Coldest
6.3 °C
Wettest
40%
Windiest
5.7 m/s
Prevailing
SW
4.9 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 Rhondda over the whole year is 11°C. July is the hottest month, with highs of about 19°C; January is the coldest, with lows of about 5°C. Rhondda has no sharply defined rainy season: the chance of rain on a given day runs from 21% in July, the driest month, to 36% in December, the wettest. Winds in Rhondda are highest in February, averaging 4.9 m/s (18 km/h), and lightest in September, at 3.8 m/s (14 km/h). The prevailing wind is from the SW. The clearest skies in Rhondda come in May, when the sky is typically 50% covered; December is the cloudiest month, at 73%.
Month by month Rhondda 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
7°C
5°C
2°C
29%
67%
4.3 m/s
0
0
14
February
8°C
5°C
3°C
32%
68%
4.9 m/s
0
0
19
March
9°C
5°C
4°C
32%
65%
4.6 m/s
1
0
31
April
12°C
7°C
7°C
22%
55%
4.3 m/s
6
0
51
May
15°C
10°C
12°C
23%
50%
4.0 m/s
26
0
77
June
18°C
14°C
15°C
22%
57%
4.3 m/s
49
3
79
July
19°C
15°C
17°C
21%
58%
3.9 m/s
66
8
76
August
19°C
14°C
17°C
25%
60%
3.9 m/s
65
4
79
September
17°C
13°C
15°C
28%
59%
3.8 m/s
49
3
79
October
14°C
11°C
11°C
32%
63%
4.1 m/s
16
0
73
November
10°C
8°C
6°C
31%
67%
4.3 m/s
1
0
43
December
8°C
6°C
3°C
36%
73%
4.5 m/s
0
0
24
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 Rhondda weather by season
Year round, Rhondda has days of about 7°C at their warmest in January, its coolest month, and 19°C in July, its warmest; the coolest hours of the day run from 5°C to 15°C through the year, and the average temperature over the year is 11°C around the clock. Rain is most likely around December and least likely around July. 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.
Rhondda weather in winterDecember to February
High 7°CLow 5°CRain 32%
Winter in Rhondda has typical daily highs of about 7°C and lows of about 5°C, with a 32% chance of rain on a given day.
Rhondda weather in springMarch to May
High 12°CLow 8°CRain 25%
Spring in Rhondda has typical daily highs of about 12°C and lows of about 8°C, with a 25% chance of rain on a given day.
Rhondda weather in summerJune to August
High 19°CLow 14°CRain 23%
Summer in Rhondda has typical daily highs of about 19°C and lows of about 14°C, with a 23% chance of rain on a given day.
Rhondda weather in autumnSeptember to November
High 14°CLow 10°CRain 30%
Autumn in Rhondda has typical daily highs of about 14°C and lows of about 10°C, with a 30% chance of rain on a given day.
When is the rainy season in Rhondda?
Rhondda has no sharply defined rainy season: the chance of rain on a given day runs from 21% in July, the driest month, to 36% in December, the wettest.
What time of year is Rhondda windiest?
Winds in Rhondda are highest in February, averaging 4.9 m/s (18 km/h), and lightest in September, at 3.8 m/s (14 km/h). The prevailing wind is from the SW.
What is the average temperature in Rhondda year round?
The average temperature in Rhondda over the whole year is 11°C. July is the hottest month, with highs of about 19°C; January is the coldest, with lows of about 5°C.