Trallwyn weather

The Trallwyn weather guide shows monthly weather averages (including daytime and night-time temperatures, rainfall and hours of sunshine) for holidays in Trallwyn, Swansea Area, Wales in 2026/2027.

• Trallwyn weather averages
• Trallwyn weather by month
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Trallwyn weather averages

Check the Trallwyn 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 Trallwyn, Swansea Area, Wales.

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Trallwyn weather by month

Check the weather for Trallwyn, Swansea Area, 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.

• January
• February
• March
• April
• May
• June
• July
• August
• September
• October
• November
• December

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Trallwyn weather in January

The average maximum daytime temperature in Trallwyn 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 2 hours of sunshine a day in Trallwyn during January.

• 6
  6°C max day temperature
• 2
  2 hours of sunshine per day
• 21
  21 days with some rainfall
• 2
  2°C min night temperature
• 227
  227 mm of monthly rainfall

On average 227 mm (8.9 inches) of rain normally falls in Trallwyn during January with rain falling on 21 days of the month.

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Trallwyn weather in February

The average maximum daytime temperature in Trallwyn 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 3 hours of sunshine a day in Trallwyn during February.

• 6
  6°C max day temperature
• 3
  3 hours of sunshine per day
• 17
  17 days with some rainfall
• 2
  2°C min night temperature
• 157
  157 mm of monthly rainfall

On average 157 mm (6.2 inches) of rain normally falls in Trallwyn during February with rain falling on 17 days of the month.

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Trallwyn weather in March

The average maximum daytime temperature in Trallwyn 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 4 hours of sunshine a day in Trallwyn during March.

• 8
  8°C max day temperature
• 4
  4 hours of sunshine per day
• 18
  18 days with some rainfall
• 3
  3°C min night temperature
• 162
  162 mm of monthly rainfall

On average 162 mm (6.4 inches) of rain normally falls in Trallwyn during March with rain falling on 18 days of the month.

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Trallwyn weather in April

The average maximum daytime temperature in Trallwyn 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 6 hours of sunshine a day in Trallwyn during April.

• 11
  11°C max day temperature
• 6
  6 hours of sunshine per day
• 15
  15 days with some rainfall
• 4
  4°C min night temperature
• 113
  113 mm of monthly rainfall

On average 113 mm (4.4 inches) of rain normally falls in Trallwyn during April with rain falling on 15 days of the month.

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Trallwyn weather in May

The average maximum daytime temperature in Trallwyn 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 7 hours of sunshine a day in Trallwyn during May.

• 14
  14°C max day temperature
• 7
  7 hours of sunshine per day
• 14
  14 days with some rainfall
• 7
  7°C min night temperature
• 105
  105 mm of monthly rainfall

On average 105 mm (4.1 inches) of rain normally falls in Trallwyn during May with rain falling on 14 days of the month.

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Trallwyn weather in June

The average maximum daytime temperature in Trallwyn 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 7 hours of sunshine a day in Trallwyn during June.

• 17
  17°C max day temperature
• 7
  7 hours of sunshine per day
• 15
  15 days with some rainfall
• 9
  9°C min night temperature
• 118
  118 mm of monthly rainfall

On average 118 mm (4.6 inches) of rain normally falls in Trallwyn during June with rain falling on 15 days of the month.

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Trallwyn weather in July

The average maximum daytime temperature in Trallwyn 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 6 hours of sunshine a day in Trallwyn during July.

• 19
  19°C max day temperature
• 6
  6 hours of sunshine per day
• 14
  14 days with some rainfall
• 12
  12°C min night temperature
• 104
  104 mm of monthly rainfall

On average 104 mm (4.1 inches) of rain normally falls in Trallwyn during July with rain falling on 14 days of the month.

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Trallwyn weather in August

The average maximum daytime temperature in Trallwyn 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 6 hours of sunshine a day in Trallwyn during August.

• 19
  19°C max day temperature
• 6
  6 hours of sunshine per day
• 16
  16 days with some rainfall
• 12
  12°C min night temperature
• 152
  152 mm of monthly rainfall

On average 152 mm (6 inches) of rain normally falls in Trallwyn during August with rain falling on 16 days of the month.

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Trallwyn weather in September

The average maximum daytime temperature in Trallwyn 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 5 hours of sunshine a day in Trallwyn during September.

• 16
  16°C max day temperature
• 5
  5 hours of sunshine per day
• 17
  17 days with some rainfall
• 10
  10°C min night temperature
• 165
  165 mm of monthly rainfall

On average 165 mm (6.5 inches) of rain normally falls in Trallwyn during September with rain falling on 17 days of the month.

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Trallwyn weather in October

The average maximum daytime temperature in Trallwyn 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 Trallwyn during October.

• 13
  13°C max day temperature
• 3
  3 hours of sunshine per day
• 19
  19 days with some rainfall
• 7
  7°C min night temperature
• 200
  200 mm of monthly rainfall

On average 200 mm (7.9 inches) of rain normally falls in Trallwyn during October with rain falling on 19 days of the month.

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Trallwyn weather in November

The average maximum daytime temperature in Trallwyn 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 Trallwyn during November.

• 9
  9°C max day temperature
• 2
  2 hours of sunshine per day
• 20
  20 days with some rainfall
• 4
  4°C min night temperature
• 225
  225 mm of monthly rainfall

On average 225 mm (8.9 inches) of rain normally falls in Trallwyn during November with rain falling on 20 days of the month.

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Trallwyn weather in December

The average maximum daytime temperature in Trallwyn 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 2 hours of sunshine a day in Trallwyn during December.

• 7
  7°C max day temperature
• 2
  2 hours of sunshine per day
• 21
  21 days with some rainfall
• 3
  3°C min night temperature
• 243
  243 mm of monthly rainfall

On average 243 mm (9.6 inches) of rain normally falls in Trallwyn during December with rain falling on 21 days of the month.

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