Union Island weather live forecast

Today's maximum temperature in Union Island is expected to be 27°C. Select a day from the live weather forecast for Union Island, St Vincent & the Grenadines for more weather parameters.

Sunday
5th Apr
27

26

5

11
Monday
6th Apr
26

26

4

11
Tuesday
7th Apr
27

26

6

11
Wednesday
8th Apr
26

26

5

11
Thursday
9th Apr
26

26

6

11

5-day weather forecast updated at 04:01 on Sunday 5th April 2026 GMT

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The 5-day weather forecast for St Vincent & the Grenadines (Union Island) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Union Island weather forecast by day

Below are the detailed weather forecasts for Union Island for the next 5 days.

Union Island weather for Sunday 5th April 2026

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 11+ (Extreme) and 5 hours of bright sunshine. There are 10-20 mm of rainfall expected with 76% chance of some rain and a fresh breeze of 30 kph from the east.

27
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
11
UV index (Extreme)
76
% chance of some rain
<20
mm of rainfall expected
L
low heat & humidity
30
kph wind from E

Union Island weather for Monday 6th April 2026

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 11 (Extreme) and 4 hours of bright sunshine. There are 20-30 mm of rainfall expected with 60% chance of some rain and a fresh breeze of 30 kph from the east.

26
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
11
UV index (Extreme)
60
% chance of some rain
<30
mm of rainfall expected
L
low heat & humidity
30
kph wind from E

Union Island weather for Tuesday 7th April 2026

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 11+ (Extreme) and 6 hours of bright sunshine. There are 30-40 mm of rainfall expected with 35% chance of some rain and a fresh breeze of 31 kph from the east.

27
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
11
UV index (Extreme)
35
% chance of some rain
<40
mm of rainfall expected
L
low heat & humidity
31
kph wind from E

Union Island weather for Wednesday 8th April 2026

Expect broken clouds in Union Island, St Vincent & the Grenadines with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 11+ (Extreme) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 29 kph from the east.

26
°C maximum temperature
26
°C minimum temperature
broken clouds
5
hours of sunshine
11
UV index (Extreme)
0
mm of rainfall expected
L
low heat & humidity
29
kph wind from E

Union Island weather for Thursday 9th April 2026

Expect broken clouds in Union Island, St Vincent & the Grenadines with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 11+ (Extreme) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 26 kph from the east.