Hertfordshire weather live forecast

Today's maximum temperature in Hertfordshire is expected to be 18°C. Select a day from the live weather forecast for Hertfordshire (Watford), UK for more weather parameters.

Wednesday
20th May
18

11

5

UV3
Thursday
21st May
22

10

6

UV5
Friday
22nd May
27

13

13

UV6
Saturday
23rd May
27

16

7

UV5
Sunday
24th May
27

14

11

UV7

5-day weather forecast updated at 04:03 on Wednesday 20th May 2026 GMT

More about Hertfordshire

Hertfordshire by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Hertfordshire

Spabreaks.com promo code: 8% off bookings & vouchers

Exclusive

Save 8% on spa breaks, spa days & gift vouchers
Check out latest offers on over 550 spas across the UK
A guaranteed experience to suit your budget & occasion

Show discount code

******SB8

Redeem Spabreaks.com discount code >>

Expires at 23:59 on Thursday 31st Dec 2026 · View all Spabreaks.com offers

Spa break finder

Destination

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

Top Hertfordshire destinations

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 Wednesday 20th May 2026

Expect broken clouds in Hertfordshire with a maximum temperature of 18°C, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 21 kph from the west.

18
°C maximum temperature
11
°C minimum temperature
broken clouds
5
hours of sunshine
UV3
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
21
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 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south-west.

22
°C maximum temperature
10
°C minimum temperature
broken clouds
6
hours of sunshine
UV5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
12
kph wind from SW

Hertfordshire weather for Friday 22nd May 2026

Expect scattered clouds in Hertfordshire with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 6 (High) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the south.

27
°C maximum temperature
13
°C minimum temperature
scattered clouds
13
hours of sunshine
UV6
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
20
kph wind from S

Hertfordshire weather for Saturday 23rd May 2026

Expect broken clouds in Hertfordshire with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the west.

27
°C maximum temperature
16
°C minimum temperature
broken clouds
7
hours of sunshine
UV5
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
9
kph wind from W

Hertfordshire weather for Sunday 24th May 2026

Expect scattered clouds in Hertfordshire with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 7 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the east.