Thornhill weather

The Thornhill weather guide shows monthly weather averages (including daytime and night-time temperatures, rainfall and hours of sunshine) for holidays in Thornhill, Dumfries and Galloway, Scotland in 2026/2027.

• Thornhill weather averages
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Thornhill weather averages

Check the Thornhill 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 Thornhill, Dumfries and Galloway, Scotland.

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Thornhill weather by month

Check the weather for Thornhill, Dumfries and Galloway, Scotland 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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Thornhill weather in January

The average maximum daytime temperature in Thornhill 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 Thornhill 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
• 176
  176 mm of monthly rainfall

On average 176 mm (6.9 inches) of rain normally falls in Thornhill during January with rain falling on 21 days of the month.

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Thornhill weather in February

The average maximum daytime temperature in Thornhill 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 Thornhill 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
• 121
  121 mm of monthly rainfall

On average 121 mm (4.8 inches) of rain normally falls in Thornhill during February with rain falling on 18 days of the month.

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Thornhill weather in March

The average maximum daytime temperature in Thornhill in March is a cool 8°C (46°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 Thornhill during March.

• 8
  8°C max day temperature
• 3
  3 hours of sunshine per day
• 20
  20 days with some rainfall
• 1
  1°C min night temperature
• 129
  129 mm of monthly rainfall

On average 129 mm (5.1 inches) of rain normally falls in Thornhill during March with rain falling on 20 days of the month.

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Thornhill weather in April

The average maximum daytime temperature in Thornhill 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 Thornhill during April.

• 10
  10°C max day temperature
• 5
  5 hours of sunshine per day
• 15
  15 days with some rainfall
• 2
  2°C min night temperature
• 79
  79 mm of monthly rainfall

On average 79 mm (3.1 inches) of rain normally falls in Thornhill during April with rain falling on 15 days of the month.

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Thornhill weather in May

The average maximum daytime temperature in Thornhill 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 Thornhill during May.

• 14
  14°C max day temperature
• 6
  6 hours of sunshine per day
• 16
  16 days with some rainfall
• 5
  5°C min night temperature
• 82
  82 mm of monthly rainfall

On average 82 mm (3.2 inches) of rain normally falls in Thornhill during May with rain falling on 16 days of the month.

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Thornhill weather in June

The average maximum daytime temperature in Thornhill in June is a comfortable 16°C (61°F), while the average minimum night-time temperature is a cool 8°C (46°F). You can expect on average 6 hours of sunshine a day in Thornhill during June.

• 16
  16°C max day temperature
• 6
  6 hours of sunshine per day
• 16
  16 days with some rainfall
• 8
  8°C min night temperature
• 80
  80 mm of monthly rainfall

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

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Thornhill weather in July

The average maximum daytime temperature in Thornhill 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 Thornhill during July.

• 18
  18°C max day temperature
• 5
  5 hours of sunshine per day
• 16
  16 days with some rainfall
• 10
  10°C min night temperature
• 88
  88 mm of monthly rainfall

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

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Thornhill weather in August

The average maximum daytime temperature in Thornhill in August 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 5 hours of sunshine a day in Thornhill during August.

• 18
  18°C max day temperature
• 5
  5 hours of sunshine per day
• 17
  17 days with some rainfall
• 9
  9°C min night temperature
• 107
  107 mm of monthly rainfall

On average 107 mm (4.2 inches) of rain normally falls in Thornhill during August with rain falling on 17 days of the month.

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Thornhill weather in September

The average maximum daytime temperature in Thornhill 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 3 hours of sunshine a day in Thornhill during September.

• 15
  15°C max day temperature
• 3
  3 hours of sunshine per day
• 18
  18 days with some rainfall
• 8
  8°C min night temperature
• 133
  133 mm of monthly rainfall

On average 133 mm (5.2 inches) of rain normally falls in Thornhill during September with rain falling on 18 days of the month.

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Thornhill weather in October

The average maximum daytime temperature in Thornhill 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 Thornhill during October.

• 12
  12°C max day temperature
• 3
  3 hours of sunshine per day
• 20
  20 days with some rainfall
• 5
  5°C min night temperature
• 163
  163 mm of monthly rainfall

On average 163 mm (6.4 inches) of rain normally falls in Thornhill during October with rain falling on 20 days of the month.

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Thornhill weather in November

The average maximum daytime temperature in Thornhill in November is a cool 8°C (46°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 Thornhill during November.

• 8
  8°C max day temperature
• 2
  2 hours of sunshine per day
• 21
  21 days with some rainfall
• 2
  2°C min night temperature
• 154
  154 mm of monthly rainfall

On average 154 mm (6.1 inches) of rain normally falls in Thornhill during November with rain falling on 21 days of the month.

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Thornhill weather in December

The average maximum daytime temperature in Thornhill 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 Thornhill during December.

• 6
  6°C max day temperature
• 1
  1 hour of sunshine per day
• 21
  21 days with some rainfall
• 1
  1°C min night temperature
• 169
  169 mm of monthly rainfall

On average 169 mm (6.7 inches) of rain normally falls in Thornhill during December with rain falling on 21 days of the month.

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