Llanrumney weather

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

• Llanrumney weather averages
• Llanrumney weather by month
• Back to Cardiff Area
• Back to Wales

Llanrumney weather averages

Check the Llanrumney 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 Llanrumney, Cardiff Area, Wales.

Back to top

Llanrumney weather by month

Check the weather for Llanrumney, 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

Back to top

Llanrumney weather in January

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

• 6
  6°C max day temperature
• 2
  2 hours of sunshine per day
• 20
  20 days with some rainfall
• 1
  1°C min night temperature
• 165
  165 mm of monthly rainfall

On average 165 mm (6.5 inches) of rain normally falls in Llanrumney during January with rain falling on 20 days of the month.

Back to months

Llanrumney weather in February

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

• 7
  7°C max day temperature
• 2
  2 hours of sunshine per day
• 16
  16 days with some rainfall
• 1
  1°C min night temperature
• 120
  120 mm of monthly rainfall

On average 120 mm (4.7 inches) of rain normally falls in Llanrumney during February with rain falling on 16 days of the month.

Back to months

Llanrumney weather in March

The average maximum daytime temperature in Llanrumney in March is a cool 9°C (48°F), while the average minimum night-time temperature is a cold 2°C (36°F). You can expect on average 4 hours of sunshine a day in Llanrumney during March.

• 9
  9°C max day temperature
• 4
  4 hours of sunshine per day
• 18
  18 days with some rainfall
• 2
  2°C min night temperature
• 114
  114 mm of monthly rainfall

On average 114 mm (4.5 inches) of rain normally falls in Llanrumney during March with rain falling on 18 days of the month.

Back to months

Llanrumney weather in April

The average maximum daytime temperature in Llanrumney 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 Llanrumney during April.

• 11
  11°C max day temperature
• 5
  5 hours of sunshine per day
• 15
  15 days with some rainfall
• 4
  4°C min night temperature
• 86
  86 mm of monthly rainfall

On average 86 mm (3.4 inches) of rain normally falls in Llanrumney during April with rain falling on 15 days of the month.

Back to months

Llanrumney weather in May

The average maximum daytime temperature in Llanrumney in May is a comfortable 15°C (59°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 Llanrumney during May.

• 15
  15°C max day temperature
• 6
  6 hours of sunshine per day
• 14
  14 days with some rainfall
• 6
  6°C min night temperature
• 80
  80 mm of monthly rainfall

On average 80 mm (3.1 inches) of rain normally falls in Llanrumney during May with rain falling on 14 days of the month.

Back to months

Llanrumney weather in June

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

• 18
  18°C max day temperature
• 7
  7 hours of sunshine per day
• 14
  14 days with some rainfall
• 9
  9°C min night temperature
• 80
  80 mm of monthly rainfall

On average 80 mm (3.1 inches) of rain normally falls in Llanrumney during June with rain falling on 14 days of the month.

Back to months

Llanrumney weather in July

The average maximum daytime temperature in Llanrumney in July is a comfortable 20°C (68°F), while the average minimum night-time temperature is a cool 11°C (52°F). You can expect on average 6 hours of sunshine a day in Llanrumney during July.

• 20
  20°C max day temperature
• 6
  6 hours of sunshine per day
• 13
  13 days with some rainfall
• 11
  11°C min night temperature
• 68
  68 mm of monthly rainfall

On average 68 mm (2.7 inches) of rain normally falls in Llanrumney during July with rain falling on 13 days of the month.

Back to months

Llanrumney weather in August

The average maximum daytime temperature in Llanrumney in August is a comfortable 20°C (68°F), while the average minimum night-time temperature is a cool 11°C (52°F). You can expect on average 6 hours of sunshine a day in Llanrumney during August.

• 20
  20°C max day temperature
• 6
  6 hours of sunshine per day
• 15
  15 days with some rainfall
• 11
  11°C min night temperature
• 97
  97 mm of monthly rainfall

On average 97 mm (3.8 inches) of rain normally falls in Llanrumney during August with rain falling on 15 days of the month.

Back to months

Llanrumney weather in September

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

• 17
  17°C max day temperature
• 5
  5 hours of sunshine per day
• 15
  15 days with some rainfall
• 9
  9°C min night temperature
• 112
  112 mm of monthly rainfall

On average 112 mm (4.4 inches) of rain normally falls in Llanrumney during September with rain falling on 15 days of the month.

Back to months

Llanrumney weather in October

The average maximum daytime temperature in Llanrumney 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 Llanrumney during October.

• 13
  13°C max day temperature
• 3
  3 hours of sunshine per day
• 18
  18 days with some rainfall
• 7
  7°C min night temperature
• 138
  138 mm of monthly rainfall

On average 138 mm (5.4 inches) of rain normally falls in Llanrumney during October with rain falling on 18 days of the month.

Back to months

Llanrumney weather in November

The average maximum daytime temperature in Llanrumney 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 Llanrumney during November.

• 9
  9°C max day temperature
• 2
  2 hours of sunshine per day
• 19
  19 days with some rainfall
• 4
  4°C min night temperature
• 146
  146 mm of monthly rainfall

On average 146 mm (5.7 inches) of rain normally falls in Llanrumney during November with rain falling on 19 days of the month.

Back to months

Llanrumney weather in December

The average maximum daytime temperature in Llanrumney in December 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 Llanrumney during December.

• 7
  7°C max day temperature
• 2
  2 hours of sunshine per day
• 19
  19 days with some rainfall
• 2
  2°C min night temperature
• 168
  168 mm of monthly rainfall

On average 168 mm (6.6 inches) of rain normally falls in Llanrumney during December with rain falling on 19 days of the month.

Back to months