Hertfordshire weather live forecast

Today's maximum temperature in Hertfordshire is expected to be 15°C. Select a day from the live weather forecast for Hertfordshire (Watford), UK for more weather parameters.

Sunday
17th May
15

8

2

4
Monday
18th May
13

7

2

3
Tuesday
19th May
16

9

2

4
Wednesday
20th May
18

11

4

5
Thursday
21st May
20

10

1

4

5-day weather forecast updated at 04:03 on Sunday 17th 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 Sunday 17th May 2026

Expect mostly cloudy with light rain in Hertfordshire with a maximum temperature of 15°C, maximum UV of 4 (Moderate) and 2 hours of bright sunshine. There are 0-2 mm of rainfall expected with 16% chance of some rain and a light breeze of 12 kph from the west.

15
°C maximum temperature
8
°C minimum temperature
mostly cloudy with light rain
2
hours of sunshine
4
UV index (Moderate)
16
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
12
kph wind from W

Hertfordshire weather for Monday 18th May 2026

Expect mostly cloudy with light rain in Hertfordshire with a maximum temperature of 13°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 2-5 mm of rainfall expected with 58% chance of some rain and a light breeze of 12 kph from the south-west.

13
°C maximum temperature
7
°C minimum temperature
mostly cloudy with light rain
2
hours of sunshine
3
UV index (Moderate)
58
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
12
kph wind from SW

Hertfordshire weather for Tuesday 19th May 2026

Expect mostly cloudy with rain in Hertfordshire with a maximum temperature of 16°C, maximum UV of 4 (Moderate) and 2 hours of bright sunshine. There are 5-10 mm of rainfall expected with 65% chance of some rain and a moderate breeze of 22 kph from the south-west.

16
°C maximum temperature
9
°C minimum temperature
mostly cloudy with rain
2
hours of sunshine
4
UV index (Moderate)
65
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
22
kph wind from SW

Hertfordshire weather for Wednesday 20th May 2026

Expect mostly cloudy with light rain in Hertfordshire with a maximum temperature of 18°C, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 44% chance of some rain and a moderate breeze of 24 kph from the south-west.

18
°C maximum temperature
11
°C minimum temperature
mostly cloudy with light rain
4
hours of sunshine
5
UV index (Moderate)
44
% chance of some rain
<2
mm of rainfall expected
18
°C wind chill
24
kph wind from SW

Hertfordshire weather for Thursday 21st May 2026

Expect broken clouds in Hertfordshire with a maximum temperature of 20°C, maximum UV of 4 (Moderate) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the south-west.