Trefriw weather

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

• Trefriw weather averages
• Trefriw weather by month
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Trefriw weather averages

Check the Trefriw 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 Trefriw, Aberconwy and Colwyn, Wales.

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Trefriw weather by month

Check the weather for Trefriw, Aberconwy and Colwyn, 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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Trefriw weather in January

The average maximum daytime temperature in Trefriw in January 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 Trefriw during January.

• 7
  7°C max day temperature
• 1
  1 hour of sunshine per day
• 21
  21 days with some rainfall
• 2
  2°C min night temperature
• 148
  148 mm of monthly rainfall

On average 148 mm (5.8 inches) of rain normally falls in Trefriw during January with rain falling on 21 days of the month.

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Trefriw weather in February

The average maximum daytime temperature in Trefriw in February 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 2 hours of sunshine a day in Trefriw during February.

• 7
  7°C max day temperature
• 2
  2 hours of sunshine per day
• 18
  18 days with some rainfall
• 2
  2°C min night temperature
• 109
  109 mm of monthly rainfall

On average 109 mm (4.3 inches) of rain normally falls in Trefriw during February with rain falling on 18 days of the month.

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Trefriw weather in March

The average maximum daytime temperature in Trefriw 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 Trefriw during March.

• 8
  8°C max day temperature
• 3
  3 hours of sunshine per day
• 19
  19 days with some rainfall
• 3
  3°C min night temperature
• 119
  119 mm of monthly rainfall

On average 119 mm (4.7 inches) of rain normally falls in Trefriw during March with rain falling on 19 days of the month.

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Trefriw weather in April

The average maximum daytime temperature in Trefriw 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 Trefriw during April.

• 11
  11°C max day temperature
• 5
  5 hours of sunshine per day
• 16
  16 days with some rainfall
• 4
  4°C min night temperature
• 80
  80 mm of monthly rainfall

On average 80 mm (3.1 inches) of rain normally falls in Trefriw during April with rain falling on 16 days of the month.

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Trefriw weather in May

The average maximum daytime temperature in Trefriw in May is a comfortable 14°C (57°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 Trefriw during May.

• 14
  14°C max day temperature
• 6
  6 hours of sunshine per day
• 15
  15 days with some rainfall
• 6
  6°C min night temperature
• 75
  75 mm of monthly rainfall

On average 75 mm (3 inches) of rain normally falls in Trefriw during May with rain falling on 15 days of the month.

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Trefriw weather in June

The average maximum daytime temperature in Trefriw in June is a comfortable 16°C (61°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 Trefriw during June.

• 16
  16°C max day temperature
• 6
  6 hours of sunshine per day
• 15
  15 days with some rainfall
• 9
  9°C min night temperature
• 76
  76 mm of monthly rainfall

On average 76 mm (3 inches) of rain normally falls in Trefriw during June with rain falling on 15 days of the month.

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Trefriw weather in July

The average maximum daytime temperature in Trefriw in July is a comfortable 18°C (64°F), while the average minimum night-time temperature is a cool 11°C (52°F). You can expect on average 5 hours of sunshine a day in Trefriw during July.

• 18
  18°C max day temperature
• 5
  5 hours of sunshine per day
• 14
  14 days with some rainfall
• 11
  11°C min night temperature
• 67
  67 mm of monthly rainfall

On average 67 mm (2.6 inches) of rain normally falls in Trefriw during July with rain falling on 14 days of the month.

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Trefriw weather in August

The average maximum daytime temperature in Trefriw in August is a comfortable 18°C (64°F), while the average minimum night-time temperature is a cool 11°C (52°F). You can expect on average 5 hours of sunshine a day in Trefriw during August.

• 18
  18°C max day temperature
• 5
  5 hours of sunshine per day
• 16
  16 days with some rainfall
• 11
  11°C min night temperature
• 88
  88 mm of monthly rainfall

On average 88 mm (3.5 inches) of rain normally falls in Trefriw during August with rain falling on 16 days of the month.

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Trefriw weather in September

The average maximum daytime temperature in Trefriw in September is a comfortable 16°C (61°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 Trefriw during September.

• 16
  16°C max day temperature
• 4
  4 hours of sunshine per day
• 16
  16 days with some rainfall
• 9
  9°C min night temperature
• 123
  123 mm of monthly rainfall

On average 123 mm (4.8 inches) of rain normally falls in Trefriw during September with rain falling on 16 days of the month.

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Trefriw weather in October

The average maximum daytime temperature in Trefriw 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 Trefriw during October.

• 13
  13°C max day temperature
• 3
  3 hours of sunshine per day
• 20
  20 days with some rainfall
• 7
  7°C min night temperature
• 145
  145 mm of monthly rainfall

On average 145 mm (5.7 inches) of rain normally falls in Trefriw during October with rain falling on 20 days of the month.

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Trefriw weather in November

The average maximum daytime temperature in Trefriw 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 Trefriw during November.

• 9
  9°C max day temperature
• 2
  2 hours of sunshine per day
• 21
  21 days with some rainfall
• 4
  4°C min night temperature
• 162
  162 mm of monthly rainfall

On average 162 mm (6.4 inches) of rain normally falls in Trefriw during November with rain falling on 21 days of the month.

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Trefriw weather in December

The average maximum daytime temperature in Trefriw in December 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 1 hours of sunshine a day in Trefriw during December.

• 8
  8°C max day temperature
• 1
  1 hour of sunshine per day
• 21
  21 days with some rainfall
• 3
  3°C min night temperature
• 160
  160 mm of monthly rainfall

On average 160 mm (6.3 inches) of rain normally falls in Trefriw during December with rain falling on 21 days of the month.

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