Hirwaun weather
The Hirwaun weather guide shows monthly weather averages (including daytime and night-time temperatures, rainfall and hours of sunshine) for holidays in Hirwaun, Rhondda Cynon Tall, Wales in 2026/2027.
Hirwaun weather averages
Check the Hirwaun weather averages for each month of the year including maximum daytime and minimum night-time temperatures, monthly rainfall, number of days with rain and average daily hours of sunshine for Hirwaun, Rhondda Cynon Tall, Wales.
Hirwaun weather by month
Check the weather for Hirwaun, Rhondda Cynon Tall, Wales for a particular month by selecting from the list below. This gives the best indication of what to expect from the weather months in advance.
Hirwaun weather in January
The average maximum daytime temperature in Hirwaun in January is a cold 6°C (43°F), while the average minimum night-time temperature is a cold 2°C (36°F). You can expect on average 1 hours of sunshine a day in Hirwaun during January.
- 6°C max day temperature
6 - 1 hour of sunshine per day
1 - 21 days with some rainfall
21 - 2°C min night temperature
2 - 227 mm of monthly rainfall
227
On average 227 mm (8.9 inches) of rain normally falls in Hirwaun during January with rain falling on 21 days of the month.
Hirwaun weather in February
The average maximum daytime temperature in Hirwaun in February is a cold 6°C (43°F), while the average minimum night-time temperature is a cold 2°C (36°F). You can expect on average 2 hours of sunshine a day in Hirwaun during February.
- 6°C max day temperature6
- 2 hours of sunshine per day
2 - 17 days with some rainfall
17 - 2°C min night temperature2
- 157 mm of monthly rainfall
157
On average 157 mm (6.2 inches) of rain normally falls in Hirwaun during February with rain falling on 17 days of the month.
Hirwaun weather in March
The average maximum daytime temperature in Hirwaun in March is a cool 8°C (46°F), while the average minimum night-time temperature is a cold 3°C (37°F). You can expect on average 3 hours of sunshine a day in Hirwaun during March.
- 8°C max day temperature
8 - 3 hours of sunshine per day
3 - 18 days with some rainfall18
- 3°C min night temperature3
- 162 mm of monthly rainfall
162
On average 162 mm (6.4 inches) of rain normally falls in Hirwaun during March with rain falling on 18 days of the month.
Hirwaun weather in April
The average maximum daytime temperature in Hirwaun in April is a cool 11°C (52°F), while the average minimum night-time temperature is a cold 4°C (39°F). You can expect on average 5 hours of sunshine a day in Hirwaun during April.
- 11°C max day temperature11
- 5 hours of sunshine per day
5 - 15 days with some rainfall
15 - 4°C min night temperature4
- 113 mm of monthly rainfall
113
On average 113 mm (4.4 inches) of rain normally falls in Hirwaun during April with rain falling on 15 days of the month.
Hirwaun weather in May
The average maximum daytime temperature in Hirwaun in May is a comfortable 14°C (57°F), while the average minimum night-time temperature is a cold 7°C (45°F). You can expect on average 6 hours of sunshine a day in Hirwaun during May.
- 14°C max day temperature
14 - 6 hours of sunshine per day
6 - 14 days with some rainfall14
- 7°C min night temperature7
- 105 mm of monthly rainfall105
On average 105 mm (4.1 inches) of rain normally falls in Hirwaun during May with rain falling on 14 days of the month.
Hirwaun weather in June
The average maximum daytime temperature in Hirwaun in June is a comfortable 17°C (63°F), while the average minimum night-time temperature is a cool 9°C (48°F). You can expect on average 6 hours of sunshine a day in Hirwaun during June.
- 17°C max day temperature
17 - 6 hours of sunshine per day6
- 15 days with some rainfall15
- 9°C min night temperature9
- 118 mm of monthly rainfall118
On average 118 mm (4.6 inches) of rain normally falls in Hirwaun during June with rain falling on 15 days of the month.
Hirwaun weather in July
The average maximum daytime temperature in Hirwaun in July is a comfortable 19°C (66°F), while the average minimum night-time temperature is a cool 12°C (54°F). You can expect on average 5 hours of sunshine a day in Hirwaun during July.
- 19°C max day temperature
19 - 5 hours of sunshine per day5
- 14 days with some rainfall14
- 12°C min night temperature12
- 104 mm of monthly rainfall104
On average 104 mm (4.1 inches) of rain normally falls in Hirwaun during July with rain falling on 14 days of the month.
Hirwaun weather in August
The average maximum daytime temperature in Hirwaun in August is a comfortable 19°C (66°F), while the average minimum night-time temperature is a cool 12°C (54°F). You can expect on average 5 hours of sunshine a day in Hirwaun during August.
- 19°C max day temperature19
- 5 hours of sunshine per day5
- 16 days with some rainfall16
- 12°C min night temperature12
- 152 mm of monthly rainfall152
On average 152 mm (6 inches) of rain normally falls in Hirwaun during August with rain falling on 16 days of the month.
Hirwaun weather in September
The average maximum daytime temperature in Hirwaun in September is a comfortable 16°C (61°F), while the average minimum night-time temperature is a cool 10°C (50°F). You can expect on average 4 hours of sunshine a day in Hirwaun during September.
- 16°C max day temperature16
- 4 hours of sunshine per day
4 - 17 days with some rainfall17
- 10°C min night temperature10
- 165 mm of monthly rainfall165
On average 165 mm (6.5 inches) of rain normally falls in Hirwaun during September with rain falling on 17 days of the month.
Hirwaun weather in October
The average maximum daytime temperature in Hirwaun in October is a cool 13°C (55°F), while the average minimum night-time temperature is a cold 7°C (45°F). You can expect on average 3 hours of sunshine a day in Hirwaun during October.
- 13°C max day temperature13
- 3 hours of sunshine per day3
- 19 days with some rainfall19
- 7°C min night temperature7
- 200 mm of monthly rainfall
200
On average 200 mm (7.9 inches) of rain normally falls in Hirwaun during October with rain falling on 19 days of the month.
Hirwaun weather in November
The average maximum daytime temperature in Hirwaun in November is a cool 9°C (48°F), while the average minimum night-time temperature is a cold 4°C (39°F). You can expect on average 2 hours of sunshine a day in Hirwaun during November.
- 9°C max day temperature9
- 2 hours of sunshine per day2
- 20 days with some rainfall20
- 4°C min night temperature4
- 225 mm of monthly rainfall225
On average 225 mm (8.9 inches) of rain normally falls in Hirwaun during November with rain falling on 20 days of the month.
Hirwaun weather in December
The average maximum daytime temperature in Hirwaun in December is a cold 7°C (45°F), while the average minimum night-time temperature is a cold 3°C (37°F). You can expect on average 1 hours of sunshine a day in Hirwaun during December.
- 7°C max day temperature7
- 1 hour of sunshine per day1
- 21 days with some rainfall21
- 3°C min night temperature3
- 243 mm of monthly rainfall
243
On average 243 mm (9.6 inches) of rain normally falls in Hirwaun during December with rain falling on 21 days of the month.