Weather in St Lucia in June

How June compares

June is the 3rd warmest month of the year in St Lucia and ranks 35th of 134 destinations we compare for June - see where else is hot in June. Against London's average high of 19.6°C in June, St Lucia is 9.4°C warmer by day and 13.7°C warmer at night.

Daytime and night-time in June

The typical June day in St Lucia peaks at 29.0°C, but that is an average: the warmest 10% of days reach 29.9°C or more. About 100% of days top 25°C and 1 in 13 pass 30°C. Nights average 25.0°C; one night in ten drops to 24.2°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest June day here reached 30.9°C (2020-06-01) and the coldest night 22.7°C (2018-06-09).

Rain in June

Wet (more than 8 rainy days): about 16 days with 1 mm or more, 68 mm in total. Year to year it varies a lot - the wettest June was 2005 with 276 mm, the driest 2002 with 22 mm. Humidity averages 76%, which makes the heat feel heavier than the thermometer suggests.

Sea temperature in June

The sea averages 27.8°C - warm enough to swim (22°c+). Depending on the year it ranges from 27.3°C to 28.3°C. For the warmest sea here, come in September (29.0°C).

Sunshine and daylight

Around 4.8 hours of sunshine a day (estimated from cloud cover), 12.8 hours of daylight: the sun rises about 05:36 and sets about 18:33 local time in mid-June. Average cloud cover is 63%.

Is June a good time to visit St Lucia?

It is a reasonable choice: hot days but expect showers. The best months for St Lucia on our scoring are February, March, January; months averaging 25°C or more: Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec.

Hot days, warm nights and comfortable swimming

The heat is consistent rather than regularly extreme: days reach 25°C throughout June, while only 8% reach 30°C. Humidity of 76% makes breathable clothing and a relaxed pace sensible, especially around midday. Plan strenuous outdoor activity for a cooler part of the day, and keep shade breaks in mind. Nights averaging 25°C offer little cooling, so air conditioning is a useful accommodation feature to prioritise. The sea averages 27.8°C, making swimming a strong reason to choose June if you dislike a chilly dip. Pack light clothing for evenings as well as daytime, rather than expecting the temperature to drop sharply after sunset.

Leave room for rain and cloudy skies

Rain is the main catch, with about 16 days receiving measurable rainfall. That does not mean each of those days is a washout, but it does make a rigid outdoor schedule less appealing. Keep plans flexible and carry lightweight rain protection that will not feel too heavy in humid weather. Sunshine averages about 4.8 hours within 12.8 hours of daylight, so long days should not be confused with uninterrupted sun. June suits travellers who value warmth and swimming more than consistently clear skies. If rain would spoil the holiday for you, February, March and January are better months to consider overall.