Treforest weather
The Treforest weather guide shows monthly weather averages (including daytime and night-time temperatures, rainfall and hours of sunshine) for holidays in Treforest, Rhondda Cynon Tall, Wales in 2026/2027.
Treforest weather averages
Check the Treforest 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 Treforest, Rhondda Cynon Tall, Wales.
Treforest weather by month
Check the weather for Treforest, 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.
Treforest weather in January
The average maximum daytime temperature in Treforest in January is a cold 6°C (43°F), while the average minimum night-time temperature is a cold 1°C (34°F). You can expect on average 2 hours of sunshine a day in Treforest during January.
- 6°C max day temperature
6 - 2 hours of sunshine per day
2 - 20 days with some rainfall
20 - 1°C min night temperature
1 - 165 mm of monthly rainfall
165
On average 165 mm (6.5 inches) of rain normally falls in Treforest during January with rain falling on 20 days of the month.
Treforest weather in February
The average maximum daytime temperature in Treforest in February is a cold 7°C (45°F), while the average minimum night-time temperature is a cold 1°C (34°F). You can expect on average 2 hours of sunshine a day in Treforest during February.
- 7°C max day temperature7
- 2 hours of sunshine per day2
- 16 days with some rainfall
16 - 1°C min night temperature1
- 120 mm of monthly rainfall
120
On average 120 mm (4.7 inches) of rain normally falls in Treforest during February with rain falling on 16 days of the month.
Treforest weather in March
The average maximum daytime temperature in Treforest in March is a cool 9°C (48°F), while the average minimum night-time temperature is a cold 2°C (36°F). You can expect on average 4 hours of sunshine a day in Treforest during March.
- 9°C max day temperature
9 - 4 hours of sunshine per day
4 - 18 days with some rainfall18
- 2°C min night temperature2
- 114 mm of monthly rainfall114
On average 114 mm (4.5 inches) of rain normally falls in Treforest during March with rain falling on 18 days of the month.
Treforest weather in April
The average maximum daytime temperature in Treforest 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 Treforest 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
- 86 mm of monthly rainfall
86
On average 86 mm (3.4 inches) of rain normally falls in Treforest during April with rain falling on 15 days of the month.
Treforest weather in May
The average maximum daytime temperature in Treforest in May is a comfortable 15°C (59°F), while the average minimum night-time temperature is a cold 6°C (43°F). You can expect on average 6 hours of sunshine a day in Treforest during May.
- 15°C max day temperature
15 - 6 hours of sunshine per day
6 - 14 days with some rainfall14
- 6°C min night temperature6
- 80 mm of monthly rainfall
80
On average 80 mm (3.1 inches) of rain normally falls in Treforest during May with rain falling on 14 days of the month.
Treforest weather in June
The average maximum daytime temperature in Treforest in June is a comfortable 18°C (64°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 Treforest during June.
- 18°C max day temperature
18 - 6 hours of sunshine per day6
- 14 days with some rainfall14
- 9°C min night temperature9
- 80 mm of monthly rainfall80
On average 80 mm (3.1 inches) of rain normally falls in Treforest during June with rain falling on 14 days of the month.
Treforest weather in July
The average maximum daytime temperature in Treforest in July is a comfortable 20°C (68°F), while the average minimum night-time temperature is a cool 11°C (52°F). You can expect on average 6 hours of sunshine a day in Treforest during July.
- 20°C max day temperature20
- 6 hours of sunshine per day6
- 13 days with some rainfall13
- 11°C min night temperature11
- 68 mm of monthly rainfall68
On average 68 mm (2.7 inches) of rain normally falls in Treforest during July with rain falling on 13 days of the month.
Treforest weather in August
The average maximum daytime temperature in Treforest in August is a comfortable 20°C (68°F), while the average minimum night-time temperature is a cool 11°C (52°F). You can expect on average 6 hours of sunshine a day in Treforest during August.
- 20°C max day temperature20
- 6 hours of sunshine per day6
- 15 days with some rainfall15
- 11°C min night temperature11
- 97 mm of monthly rainfall97
On average 97 mm (3.8 inches) of rain normally falls in Treforest during August with rain falling on 15 days of the month.
Treforest weather in September
The average maximum daytime temperature in Treforest in September 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 4 hours of sunshine a day in Treforest during September.
- 17°C max day temperature17
- 4 hours of sunshine per day4
- 15 days with some rainfall15
- 9°C min night temperature9
- 112 mm of monthly rainfall112
On average 112 mm (4.4 inches) of rain normally falls in Treforest during September with rain falling on 15 days of the month.
Treforest weather in October
The average maximum daytime temperature in Treforest 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 Treforest during October.
- 13°C max day temperature
13 - 3 hours of sunshine per day
3 - 18 days with some rainfall18
- 7°C min night temperature7
- 138 mm of monthly rainfall
138
On average 138 mm (5.4 inches) of rain normally falls in Treforest during October with rain falling on 18 days of the month.
Treforest weather in November
The average maximum daytime temperature in Treforest 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 Treforest during November.
- 9°C max day temperature9
- 2 hours of sunshine per day2
- 19 days with some rainfall19
- 4°C min night temperature4
- 146 mm of monthly rainfall
146
On average 146 mm (5.7 inches) of rain normally falls in Treforest during November with rain falling on 19 days of the month.
Treforest weather in December
The average maximum daytime temperature in Treforest in December is a cold 7°C (45°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 Treforest during December.
- 7°C max day temperature7
- 1 hour of sunshine per day
1 - 19 days with some rainfall19
- 2°C min night temperature2
- 168 mm of monthly rainfall168
On average 168 mm (6.6 inches) of rain normally falls in Treforest during December with rain falling on 19 days of the month.