Grangetown weather

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

• Grangetown weather averages
• Grangetown weather by month
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Grangetown weather averages

Check the Grangetown 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 Grangetown, Cardiff Area, Wales.

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Grangetown weather by month

Check the weather for Grangetown, Cardiff 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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Grangetown weather in January

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

• 8
  8°C max day temperature
• 2
  2 hours of sunshine per day
• 19
  19 days with some rainfall
• 2
  2°C min night temperature
• 105
  105 mm of monthly rainfall

On average 105 mm (4.1 inches) of rain normally falls in Grangetown during January with rain falling on 19 days of the month.

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Grangetown weather in February

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

• 8
  8°C max day temperature
• 3
  3 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 Grangetown during February with rain falling on 15 days of the month.

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Grangetown weather in March

The average maximum daytime temperature in Grangetown in March is a cool 10°C (50°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 Grangetown during March.

• 10
  10°C max day temperature
• 4
  4 hours of sunshine per day
• 17
  17 days with some rainfall
• 3
  3°C min night temperature
• 76
  76 mm of monthly rainfall

On average 76 mm (3 inches) of rain normally falls in Grangetown during March with rain falling on 17 days of the month.

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Grangetown weather in April

The average maximum daytime temperature in Grangetown in April is a cool 12°C (54°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 Grangetown during April.

• 12
  12°C max day temperature
• 5
  5 hours of sunshine per day
• 14
  14 days with some rainfall
• 4
  4°C min night temperature
• 60
  60 mm of monthly rainfall

On average 60 mm (2.4 inches) of rain normally falls in Grangetown during April with rain falling on 14 days of the month.

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Grangetown weather in May

The average maximum daytime temperature in Grangetown in May 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 Grangetown during May.

• 16
  16°C max day temperature
• 6
  6 hours of sunshine per day
• 13
  13 days with some rainfall
• 7
  7°C min night temperature
• 61
  61 mm of monthly rainfall

On average 61 mm (2.4 inches) of rain normally falls in Grangetown during May with rain falling on 13 days of the month.

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Grangetown weather in June

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

• 18
  18°C max day temperature
• 7
  7 hours of sunshine per day
• 13
  13 days with some rainfall
• 10
  10°C min night temperature
• 61
  61 mm of monthly rainfall

On average 61 mm (2.4 inches) of rain normally falls in Grangetown during June with rain falling on 13 days of the month.

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Grangetown weather in July

The average maximum daytime temperature in Grangetown in July is a comfortable 21°C (70°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 Grangetown during July.

• 21
  21°C max day temperature
• 6
  6 hours of sunshine per day
• 12
  12 days with some rainfall
• 12
  12°C min night temperature
• 54
  54 mm of monthly rainfall

On average 54 mm (2.1 inches) of rain normally falls in Grangetown during July with rain falling on 12 days of the month.

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Grangetown weather in August

The average maximum daytime temperature in Grangetown in August is a comfortable 21°C (70°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 Grangetown during August.

• 21
  21°C max day temperature
• 6
  6 hours of sunshine per day
• 14
  14 days with some rainfall
• 12
  12°C min night temperature
• 77
  77 mm of monthly rainfall

On average 77 mm (3 inches) of rain normally falls in Grangetown during August with rain falling on 14 days of the month.

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Grangetown weather in September

The average maximum daytime temperature in Grangetown in September 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 Grangetown during September.

• 18
  18°C max day temperature
• 5
  5 hours of sunshine per day
• 14
  14 days with some rainfall
• 10
  10°C min night temperature
• 82
  82 mm of monthly rainfall

On average 82 mm (3.2 inches) of rain normally falls in Grangetown during September with rain falling on 14 days of the month.

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Grangetown weather in October

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

• 14
  14°C max day temperature
• 3
  3 hours of sunshine per day
• 17
  17 days with some rainfall
• 8
  8°C min night temperature
• 99
  99 mm of monthly rainfall

On average 99 mm (3.9 inches) of rain normally falls in Grangetown during October with rain falling on 17 days of the month.

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Grangetown weather in November

The average maximum daytime temperature in Grangetown in November is a cool 10°C (50°F), while the average minimum night-time temperature is a cold 5°C (41°F). You can expect on average 2 hours of sunshine a day in Grangetown during November.

• 10
  10°C max day temperature
• 2
  2 hours of sunshine per day
• 18
  18 days with some rainfall
• 5
  5°C min night temperature
• 101
  101 mm of monthly rainfall

On average 101 mm (4 inches) of rain normally falls in Grangetown during November with rain falling on 18 days of the month.

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Grangetown weather in December

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

• 8
  8°C max day temperature
• 2
  2 hours of sunshine per day
• 19
  19 days with some rainfall
• 3
  3°C min night temperature
• 110
  110 mm of monthly rainfall

On average 110 mm (4.3 inches) of rain normally falls in Grangetown during December with rain falling on 19 days of the month.

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