Weather in Grenada in January

How January compares

January is the 12th warmest month of the year in Grenada and ranks 28th of 134 destinations we compare for January - see where else is hot in January. Against London's average high of 7.4°C in January, Grenada is 19.2°C warmer by day and 22.5°C warmer at night.

Daytime and night-time in January

The typical January day in Grenada peaks at 26.6°C, but that is an average: the warmest 10% of days reach 27.3°C or more. About 100% of days top 25°C. Nights average 24.7°C; one night in ten drops to 23.9°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest January day here reached 28.8°C (2019-01-30) and the coldest night 21.9°C (2017-01-14).

Rain in January

Wet (more than 8 rainy days): about 13 days with 1 mm or more, 49 mm in total. Year to year it varies a lot - the wettest January was 2005 with 194 mm, the driest 2001 with 14 mm. Humidity averages 78%.

Sea temperature in January

The sea averages 27.1°C - warm enough to swim (22°c+). Depending on the year it ranges from 26.7°C to 27.4°C. For the warmest sea here, come in September (29.2°C).

Sunshine and daylight

Around 7.2 hours of sunshine a day (estimated from cloud cover), 11.4 hours of daylight: the sun rises about 06:31 and sets about 18:01 local time in mid-January. Average cloud cover is 37%.

Is January a good time to visit Grenada?

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

Warm days, with little cooling after dark

January is Grenada's coolest month, but that is relative: the average daytime high is 26.6°C and the night-time low is 24.7°C. Pack mainly light, breathable clothes rather than expecting cool evenings. Humidity averages 78%, so the warmth can feel more tiring than the temperature alone suggests, especially when walking around at midday. Shade breaks and accommodation with air conditioning are sensible priorities if you struggle with muggy conditions. Days consistently reach 25°C, while 30°C days are not typical of January. That makes it a reasonable choice if you want tropical warmth without choosing the island's hottest month, although nights offer little relief.

Good swimming weather, but leave room for rain

The sea averages 27.1°C, making swimming a strong reason to choose January. It is close to the daytime air temperature, so this is warm-water swimming rather than a bracing dip. Sunshine averages about 7.2 hours within 11.4 hours of daylight, giving you a useful amount of bright weather without promising clear skies throughout the day. The catch is rain: about 12 days have measurable rainfall. Keep outdoor plans flexible and bring a light waterproof, rather than treating January as reliably dry. The monthly figures do not tell you when rain will arrive or how long it will last, so avoid building your plans around an assumed daily shower pattern.