Llandeilo Weather & Climate: Best Time to Visit

The climate in Llandeilo is known for significant temperature differences throughout the year, making the weather dynamic. Average maximum daytime temperatures range from a pleasant 20°C (68°F) in July, the warmest time of the year, to a chilly 8°C (46°F) during cooler months like January.

At night, you can expect temperatures ranging from 12°C (54°F) in July to around 3°C (37°F) during January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Llandeilo has a notably wet climate with abundant precipitation, recording 1354 mm (53 in) of rain/snowfall per year. Year-round, Llandeilo has a balanced climate with minimal variation in precipitation. The difference between the wettest month, December, with 142 mm (5.6 in), and the driest month, April, with 90 mm (3.5 in), is minimal. For more details, please visit our Llandeilo Precipitation page.

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

The average number of days each month with precipitation

Seasonal changes in sunshine hours are quite dramatic in Llandeilo. While July receives considerable daily sunshine with up to 6.7 hours, December marks the darkest time of the year, where sunshine is scarce with only 1.6 hours of sunlight per day.

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