Hertfordshire weather live forecast

Today's maximum temperature in Hertfordshire is expected to be 27°C. Select a day from the live weather forecast for Hertfordshire (Watford), UK for more weather parameters.

Sunday
16th Aug
27

18

2

5
Monday
17th Aug
26

18

1

5
Tuesday
18th Aug
26

17

1

3
Wednesday
19th Aug
25

15

10

4
Thursday
20th Aug
23

14

5

4

5-day weather forecast updated at 04:03 on Sunday 16th August 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 16th August 2026

Expect broken clouds in Hertfordshire with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the north-west.

27
°C maximum temperature
18
°C minimum temperature
broken clouds
2
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
9
kph wind from NW

Hertfordshire weather for Monday 17th August 2026

Expect broken clouds in Hertfordshire with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the west.

26
°C maximum temperature
18
°C minimum temperature
broken clouds
1
hour of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
10
kph wind from W

Hertfordshire weather for Tuesday 18th August 2026

Expect mostly cloudy with light rain in Hertfordshire with a maximum temperature of 26°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 0-2 mm of rainfall expected with 36% chance of some rain and a moderate breeze of 22 kph from the west.

26
°C maximum temperature
17
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
3
UV index (Moderate)
36
% chance of some rain
<2
mm of rainfall expected
26
°C wind chill
22
kph wind from W

Hertfordshire weather for Wednesday 19th August 2026

Expect sunshine and showers in Hertfordshire with a maximum temperature of 25°C, maximum UV of 4 (Moderate) and 10 hours of bright sunshine. There are 0-2 mm of rainfall expected with 24% chance of some rain and a gentle breeze of 19 kph from the west.

25
°C maximum temperature
15
°C minimum temperature
sunshine and showers
10
hours of sunshine
4
UV index (Moderate)
24
% chance of some rain
<2
mm of rainfall expected
25
°C wind chill
19
kph wind from W

Hertfordshire weather for Thursday 20th August 2026

Expect mostly cloudy with light rain in Hertfordshire with a maximum temperature of 23°C, maximum UV of 4 (Moderate) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 48% chance of some rain and a light breeze of 12 kph from the south-west.