Trawsfynydd weather

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

• Trawsfynydd weather averages
• Trawsfynydd weather by month
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Trawsfynydd weather averages

Check the Trawsfynydd 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 Trawsfynydd, Gwynedd, Wales.

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Trawsfynydd weather by month

Check the weather for Trawsfynydd, Gwynedd, 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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Trawsfynydd weather in January

The average maximum daytime temperature in Trawsfynydd in January is a cold 5°C (41°F), while the average minimum night-time temperature is a cold 0°C (32°F). You can expect on average 1 hours of sunshine a day in Trawsfynydd during January.

• 5
  5°C max day temperature
• 1
  1 hour of sunshine per day
• 21
  21 days with some rainfall
• 0
  0°C min night temperature
• 230
  230 mm of monthly rainfall

On average 230 mm (9.1 inches) of rain normally falls in Trawsfynydd during January with rain falling on 21 days of the month.

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Trawsfynydd weather in February

The average maximum daytime temperature in Trawsfynydd in February is a cold 6°C (43°F), while the average minimum night-time temperature is a cold 0°C (32°F). You can expect on average 2 hours of sunshine a day in Trawsfynydd during February.

• 6
  6°C max day temperature
• 2
  2 hours of sunshine per day
• 18
  18 days with some rainfall
• 0
  0°C min night temperature
• 174
  174 mm of monthly rainfall

On average 174 mm (6.9 inches) of rain normally falls in Trawsfynydd during February with rain falling on 18 days of the month.

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Trawsfynydd weather in March

The average maximum daytime temperature in Trawsfynydd in March 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 3 hours of sunshine a day in Trawsfynydd during March.

• 7
  7°C max day temperature
• 3
  3 hours of sunshine per day
• 19
  19 days with some rainfall
• 1
  1°C min night temperature
• 178
  178 mm of monthly rainfall

On average 178 mm (7 inches) of rain normally falls in Trawsfynydd during March with rain falling on 19 days of the month.

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Trawsfynydd weather in April

The average maximum daytime temperature in Trawsfynydd in April is a cool 10°C (50°F), while the average minimum night-time temperature is a cold 2°C (36°F). You can expect on average 5 hours of sunshine a day in Trawsfynydd during April.

• 10
  10°C max day temperature
• 5
  5 hours of sunshine per day
• 16
  16 days with some rainfall
• 2
  2°C min night temperature
• 119
  119 mm of monthly rainfall

On average 119 mm (4.7 inches) of rain normally falls in Trawsfynydd during April with rain falling on 16 days of the month.

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Trawsfynydd weather in May

The average maximum daytime temperature in Trawsfynydd in May is a comfortable 14°C (57°F), while the average minimum night-time temperature is a cold 5°C (41°F). You can expect on average 6 hours of sunshine a day in Trawsfynydd during May.

• 14
  14°C max day temperature
• 6
  6 hours of sunshine per day
• 15
  15 days with some rainfall
• 5
  5°C min night temperature
• 104
  104 mm of monthly rainfall

On average 104 mm (4.1 inches) of rain normally falls in Trawsfynydd during May with rain falling on 15 days of the month.

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Trawsfynydd weather in June

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

• 16
  16°C max day temperature
• 6
  6 hours of sunshine per day
• 15
  15 days with some rainfall
• 7
  7°C min night temperature
• 108
  108 mm of monthly rainfall

On average 108 mm (4.3 inches) of rain normally falls in Trawsfynydd during June with rain falling on 15 days of the month.

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Trawsfynydd weather in July

The average maximum daytime temperature in Trawsfynydd in July is a comfortable 18°C (64°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 Trawsfynydd during July.

• 18
  18°C max day temperature
• 5
  5 hours of sunshine per day
• 15
  15 days with some rainfall
• 10
  10°C min night temperature
• 101
  101 mm of monthly rainfall

On average 101 mm (4 inches) of rain normally falls in Trawsfynydd during July with rain falling on 15 days of the month.

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Trawsfynydd weather in August

The average maximum daytime temperature in Trawsfynydd in August is a comfortable 18°C (64°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 Trawsfynydd during August.

• 18
  18°C max day temperature
• 5
  5 hours of sunshine per day
• 17
  17 days with some rainfall
• 10
  10°C min night temperature
• 132
  132 mm of monthly rainfall

On average 132 mm (5.2 inches) of rain normally falls in Trawsfynydd during August with rain falling on 17 days of the month.

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Trawsfynydd weather in September

The average maximum daytime temperature in Trawsfynydd in September is a comfortable 15°C (59°F), while the average minimum night-time temperature is a cool 8°C (46°F). You can expect on average 4 hours of sunshine a day in Trawsfynydd during September.

• 15
  15°C max day temperature
• 4
  4 hours of sunshine per day
• 17
  17 days with some rainfall
• 8
  8°C min night temperature
• 176
  176 mm of monthly rainfall

On average 176 mm (6.9 inches) of rain normally falls in Trawsfynydd during September with rain falling on 17 days of the month.

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Trawsfynydd weather in October

The average maximum daytime temperature in Trawsfynydd in October is a cool 12°C (54°F), while the average minimum night-time temperature is a cold 5°C (41°F). You can expect on average 3 hours of sunshine a day in Trawsfynydd during October.

• 12
  12°C max day temperature
• 3
  3 hours of sunshine per day
• 19
  19 days with some rainfall
• 5
  5°C min night temperature
• 205
  205 mm of monthly rainfall

On average 205 mm (8.1 inches) of rain normally falls in Trawsfynydd during October with rain falling on 19 days of the month.

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Trawsfynydd weather in November

The average maximum daytime temperature in Trawsfynydd in November 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 2 hours of sunshine a day in Trawsfynydd during November.

• 8
  8°C max day temperature
• 2
  2 hours of sunshine per day
• 21
  21 days with some rainfall
• 3
  3°C min night temperature
• 233
  233 mm of monthly rainfall

On average 233 mm (9.2 inches) of rain normally falls in Trawsfynydd during November with rain falling on 21 days of the month.

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Trawsfynydd weather in December

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

• 6
  6°C max day temperature
• 1
  1 hour of sunshine per day
• 22
  22 days with some rainfall
• 1
  1°C min night temperature
• 243
  243 mm of monthly rainfall

On average 243 mm (9.6 inches) of rain normally falls in Trawsfynydd during December with rain falling on 22 days of the month.

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