Castries Weather & Climate: Best Time to Visit

The climate in Castries is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a very warm 30°C (86°F) in July to a moderate 12°C (54°F) in the coolest month, January.

Nights vary from 19°C (66°F) in July to around 4°C (39°F) during the colder months.

Check out our detailed temperature page for more information.

Temperature ranges by month

Generally, Castries receives mid-range precipitation levels, with 868 mm (34 in) annually. The climate in Castries shows significant variation throughout the year. Expect high rainfall in October, the wettest month, with an average of 136 mm (5.4 in) of precipitation over 9 rainy days.

In contrast, the driest month July offers drier and sunnier days, with around 23 mm (0.9 in) of rainfall over 5 rainy days. For more details, please visit our Castries 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, Castries serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 11.3 hours of sunshine daily, and embrace the darker days in December, offering only 4.6 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is high throughout the year in Castries.

The city experiences its highest humidity in October, reaching 77%. In July, the humidity drops to its lowest level at 64%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year