Hertfordshire weather live forecast

Today's maximum temperature in Hertfordshire is expected to be 17°C. Select a day from the live weather forecast for Hertfordshire (Watford), UK for more weather parameters.

Tuesday
19th May
17

10

3

UV4
Wednesday
20th May
19

11

6

UV5
Thursday
21st May
22

10

5

UV5
Friday
22nd May
27

12

9

UV6
Saturday
23rd May
24

15

4

UV5

5-day weather forecast updated at 04:03 on Tuesday 19th May 2026 GMT

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The 5-day weather forecast for Hertfordshire (Watford) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

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Hertfordshire weather forecast by day

Below are the detailed weather forecasts for Hertfordshire for the next 5 days. The forecasts shown are for Watford and may not represent the whole of Hertfordshire. Browse more destinations in Hertfordshire to view more weather forecasts.

Hertfordshire weather for Tuesday 19th May 2026

Expect mostly cloudy with rain in Hertfordshire with a maximum temperature of 17°C, maximum UV of 4 (Moderate) and 3 hours of bright sunshine. There are 5-10 mm of rainfall expected with 51% chance of some rain and a gentle breeze of 19 kph from the south-west.

17
°C maximum temperature
10
°C minimum temperature
mostly cloudy with rain
3
hours of sunshine
UV4
UV index (Moderate)
51
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
19
kph wind from SW

Hertfordshire weather for Wednesday 20th May 2026

Expect mostly cloudy with light rain in Hertfordshire with a maximum temperature of 19°C, maximum UV of 5 (Moderate) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 29% chance of some rain and a moderate breeze of 23 kph from the west.

19
°C maximum temperature
11
°C minimum temperature
mostly cloudy with light rain
6
hours of sunshine
UV5
UV index (Moderate)
29
% chance of some rain
<2
mm of rainfall expected
19
°C wind chill
23
kph wind from W

Hertfordshire weather for Thursday 21st May 2026

Expect broken clouds in Hertfordshire with a maximum temperature of 22°C, maximum UV of 5 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the south-west.

22
°C maximum temperature
10
°C minimum temperature
broken clouds
5
hours of sunshine
UV5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
14
kph wind from SW

Hertfordshire weather for Friday 22nd May 2026

Expect broken clouds in Hertfordshire with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 6 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the south.

27
°C maximum temperature
12
°C minimum temperature
broken clouds
9
hours of sunshine
UV6
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
15
kph wind from S

Hertfordshire weather for Saturday 23rd May 2026

Expect isolated thunderstorms in Hertfordshire with a maximum temperature of 24°C, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 27% chance of some rain and a light breeze of 11 kph from the north.