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.

Wednesday
10th Dec
27

27

7

9
Thursday
11th Dec
27

26

5

8
Friday
12th Dec
27

26

6

9
Saturday
13th Dec
27

26

4

9
Sunday
14th Dec
27

26

7

9

5-day weather forecast updated at 04:02 on Wednesday 10th December 2025 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 Wednesday 10th December 2025

Expect scattered clouds in Union Island, St Vincent & the Grenadines with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 9 (Very High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 30 kph from the east.

27
°C maximum temperature
27
°C minimum temperature
scattered clouds
7
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
L
low heat & humidity
30
kph wind from E

Union Island weather for Thursday 11th December 2025

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 8 (Very High) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 58% 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
8
UV index (Very High)
58
% chance of some rain
<5
mm of rainfall expected
L
low heat & humidity
30
kph wind from E

Union Island weather for Friday 12th December 2025

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 9 (Very High) and 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 25% chance of some rain and a fresh breeze of 29 kph from the east.

27
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
9
UV index (Very High)
25
% chance of some rain
<5
mm of rainfall expected
L
low heat & humidity
29
kph wind from E

Union Island weather for Saturday 13th December 2025

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 9 (Very High) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 42% chance of some rain and a fresh breeze of 32 kph from the east.

27
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
9
UV index (Very High)
42
% chance of some rain
<2
mm of rainfall expected
L
low heat & humidity
32
kph wind from E

Union Island weather for Sunday 14th December 2025

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 9 (Very High) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 50% chance of some rain and a fresh breeze of 32 kph from the east.