Llanelli weather

The Llanelli weather guide shows monthly weather averages (including daytime and night-time temperatures, rainfall and hours of sunshine) for holidays in Llanelli, Carmarthenshire, Wales in 2022/2023.

Llanelli weather averages

Check the Llanelli 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 Llanelli, Carmarthenshire, Wales.

Max Day Temperature (°C)

Hours of Sunshine (daily)

  • Jan
  • Feb
  • Mar
  • Apr
  • May
  • Jun
  • Jul
  • Aug
  • Sep
  • Oct
  • Nov
  • Dec

Days with some Rainfall

Min Night Temperature (°C)

Monthly Rainfall (mm)

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Llanelli weather by month

Check the weather for Llanelli, Carmarthenshire, 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.

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Llanelli weather in January

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

  • 7°C maximum daytime temperature in January in Llanelli7
    7°C max day temperature
  • 2 hours of sunshine per day in January in Llanelli2
    2 hours of sunshine per day
  • 20 days with some rainfall in January in Llanelli20
    20 days with some rainfall
  • 2°C minimum night-time temperature in January in Llanelli2
    2°C min night temperature
  • 161 mm monthly rainfall in January in Llanelli161
    161 mm of monthly rainfall

On average 161 mm (6.3 inches) of rain normally falls in Llanelli during January with rain falling on 20 days of the month.

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Llanelli weather in February

The average maximum daytime temperature in Llanelli 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 Llanelli during February.

  • 8°C maximum daytime temperature in February in Llanelli8
    8°C max day temperature
  • 3 hours of sunshine per day in February in Llanelli3
    3 hours of sunshine per day
  • 16 days with some rainfall in February in Llanelli16
    16 days with some rainfall
  • 2°C minimum night-time temperature in February in Llanelli2
    2°C min night temperature
  • 112 mm monthly rainfall in February in Llanelli112
    112 mm of monthly rainfall

On average 112 mm (4.4 inches) of rain normally falls in Llanelli during February with rain falling on 16 days of the month.

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Llanelli weather in March

The average maximum daytime temperature in Llanelli in March is a cool 9°C (48°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 Llanelli during March.

  • 9°C maximum daytime temperature in March in Llanelli9
    9°C max day temperature
  • 4 hours of sunshine per day in March in Llanelli4
    4 hours of sunshine per day
  • 17 days with some rainfall in March in Llanelli17
    17 days with some rainfall
  • 3°C minimum night-time temperature in March in Llanelli3
    3°C min night temperature
  • 114 mm monthly rainfall in March in Llanelli114
    114 mm of monthly rainfall

On average 114 mm (4.5 inches) of rain normally falls in Llanelli during March with rain falling on 17 days of the month.

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Llanelli weather in April

The average maximum daytime temperature in Llanelli 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 Llanelli during April.

  • 12°C maximum daytime temperature in April in Llanelli12
    12°C max day temperature
  • 5 hours of sunshine per day in April in Llanelli5
    5 hours of sunshine per day
  • 14 days with some rainfall in April in Llanelli14
    14 days with some rainfall
  • 4°C minimum night-time temperature in April in Llanelli4
    4°C min night temperature
  • 84 mm monthly rainfall in April in Llanelli84
    84 mm of monthly rainfall

On average 84 mm (3.3 inches) of rain normally falls in Llanelli during April with rain falling on 14 days of the month.

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Llanelli weather in May

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

  • 15°C maximum daytime temperature in May in Llanelli15
    15°C max day temperature
  • 6 hours of sunshine per day in May in Llanelli6
    6 hours of sunshine per day
  • 13 days with some rainfall in May in Llanelli13
    13 days with some rainfall
  • 7°C minimum night-time temperature in May in Llanelli7
    7°C min night temperature
  • 79 mm monthly rainfall in May in Llanelli79
    79 mm of monthly rainfall

On average 79 mm (3.1 inches) of rain normally falls in Llanelli during May with rain falling on 13 days of the month.

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Llanelli weather in June

The average maximum daytime temperature in Llanelli in June is a comfortable 17°C (63°F), while the average minimum night-time temperature is a cool 10°C (50°F). You can expect on average 6 hours of sunshine a day in Llanelli during June.

  • 17°C maximum daytime temperature in June in Llanelli17
    17°C max day temperature
  • 6 hours of sunshine per day in June in Llanelli6
    6 hours of sunshine per day
  • 14 days with some rainfall in June in Llanelli14
    14 days with some rainfall
  • 10°C minimum night-time temperature in June in Llanelli10
    10°C min night temperature
  • 97 mm monthly rainfall in June in Llanelli97
    97 mm of monthly rainfall

On average 97 mm (3.8 inches) of rain normally falls in Llanelli during June with rain falling on 14 days of the month.

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Llanelli weather in July

The average maximum daytime temperature in Llanelli in July is a comfortable 20°C (68°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 Llanelli during July.

  • 20°C maximum daytime temperature in July in Llanelli20
    20°C max day temperature
  • 6 hours of sunshine per day in July in Llanelli6
    6 hours of sunshine per day
  • 13 days with some rainfall in July in Llanelli13
    13 days with some rainfall
  • 12°C minimum night-time temperature in July in Llanelli12
    12°C min night temperature
  • 86 mm monthly rainfall in July in Llanelli86
    86 mm of monthly rainfall

On average 86 mm (3.4 inches) of rain normally falls in Llanelli during July with rain falling on 13 days of the month.

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Llanelli weather in August

The average maximum daytime temperature in Llanelli in August is a comfortable 19°C (66°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 Llanelli during August.

  • 19°C maximum daytime temperature in August in Llanelli19
    19°C max day temperature
  • 6 hours of sunshine per day in August in Llanelli6
    6 hours of sunshine per day
  • 15 days with some rainfall in August in Llanelli15
    15 days with some rainfall
  • 12°C minimum night-time temperature in August in Llanelli12
    12°C min night temperature
  • 124 mm monthly rainfall in August in Llanelli124
    124 mm of monthly rainfall

On average 124 mm (4.9 inches) of rain normally falls in Llanelli during August with rain falling on 15 days of the month.

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Llanelli weather in September

The average maximum daytime temperature in Llanelli in September is a comfortable 17°C (63°F), while the average minimum night-time temperature is a cool 10°C (50°F). You can expect on average 4 hours of sunshine a day in Llanelli during September.

  • 17°C maximum daytime temperature in September in Llanelli17
    17°C max day temperature
  • 4 hours of sunshine per day in September in Llanelli4
    4 hours of sunshine per day
  • 16 days with some rainfall in September in Llanelli16
    16 days with some rainfall
  • 10°C minimum night-time temperature in September in Llanelli10
    10°C min night temperature
  • 131 mm monthly rainfall in September in Llanelli131
    131 mm of monthly rainfall

On average 131 mm (5.2 inches) of rain normally falls in Llanelli during September with rain falling on 16 days of the month.

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Llanelli weather in October

The average maximum daytime temperature in Llanelli 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 Llanelli during October.

  • 14°C maximum daytime temperature in October in Llanelli14
    14°C max day temperature
  • 3 hours of sunshine per day in October in Llanelli3
    3 hours of sunshine per day
  • 19 days with some rainfall in October in Llanelli19
    19 days with some rainfall
  • 8°C minimum night-time temperature in October in Llanelli8
    8°C min night temperature
  • 157 mm monthly rainfall in October in Llanelli157
    157 mm of monthly rainfall

On average 157 mm (6.2 inches) of rain normally falls in Llanelli during October with rain falling on 19 days of the month.

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Llanelli weather in November

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

  • 10°C maximum daytime temperature in November in Llanelli10
    10°C max day temperature
  • 2 hours of sunshine per day in November in Llanelli2
    2 hours of sunshine per day
  • 20 days with some rainfall in November in Llanelli20
    20 days with some rainfall
  • 4°C minimum night-time temperature in November in Llanelli4
    4°C min night temperature
  • 167 mm monthly rainfall in November in Llanelli167
    167 mm of monthly rainfall

On average 167 mm (6.6 inches) of rain normally falls in Llanelli during November with rain falling on 20 days of the month.

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Llanelli weather in December

The average maximum daytime temperature in Llanelli 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 Llanelli during December.

  • 8°C maximum daytime temperature in December in Llanelli8
    8°C max day temperature
  • 2 hours of sunshine per day in December in Llanelli2
    2 hours of sunshine per day
  • 20 days with some rainfall in December in Llanelli20
    20 days with some rainfall
  • 3°C minimum night-time temperature in December in Llanelli3
    3°C min night temperature
  • 169 mm monthly rainfall in December in Llanelli169
    169 mm of monthly rainfall

On average 169 mm (6.7 inches) of rain normally falls in Llanelli during December with rain falling on 20 days of the month.

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