Llanelli Weather & Climate: Best Time to Visit

In Llanelli, seasonal changes bring about a moderate variation in temperatures. Typically, average maximum daytime temperatures range from a pleasant 19°C (66°F) in August to a chilly 9°C (48°F) in the coolest month, February.

Nights vary from 14°C (57°F) in August to around 4°C (39°F) during the colder months.

Check out our detailed temperature page for more information.

Temperature ranges by month

Llanelli is known for its substantial rainfall, with annual precipitation reaching 1377 mm (54 in). Llanelli offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between the wettest month October (152 mm (6 in)) and the driest month April (83 mm (3.3 in)) is not too significant. For more details, please visit our Llanelli Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

For those who appreciate different seasons, Llanelli serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 6.7 hours of sunshine daily, and embrace the darker days in December, offering only 1.6 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The city experiences its highest humidity in January, reaching 89%. In June, the humidity drops to its lowest level at 73%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year