With a 30 per cent chance of today becoming the hottest day of the year so far, residents across the UK will be looking to enjoy the warm weather.

The weekend is set to start off warm on Friday night and throughout Saturday, before cooling down slightly on Sunday.

As residents prepare to head out into the spring sun this afternoon, here's Hertfordshire's hour-by-hour forecast for the rest of the day and The Met Office's prediction for the weekend.

Watford

Friday

3pm: 19 degrees, cloudy

4pm: 19 degrees, sunny intervals

5pm: 19 degrees, cloudy

6pm: 18 degrees, cloudy

7pm: 17 degrees, cloudy

8pm: 15 degrees, cloudy

9pm: 14 degrees, cloudy

10pm: 14 degrees, cloudy

11pm: 13 degrees, partly cloudy

Saturday

1am: 12 degrees, cloudy

4am: 11 degrees, overcast

7am: 10 degrees, overcast

11am: 14 degrees, cloudy

2pm: 17 degrees, cloudy

5pm: 17 degrees, cloudy

8pm: 13 degrees, cloudy

11pm: 10 degrees, partly cloudy

Sunday

1am: 9 degrees, cloudy

4am: 8 degrees, cloudy

7am: 7 degrees, cloudy

10am: 10 degrees, cloudy

1pm: 12 degrees, cloudy

4pm: 12 degrees, cloudy

7pm: 10 degrees, cloudy

10pm: 8 degrees, clear 

Borehamwood

Friday

3pm: 19 degrees, sunny

4pm: 19 degrees, cloudy

5pm: 19 degrees, cloudy

6pm: 18 degrees, cloudy

7pm: 16 degrees, cloudy

8pm: 15 degrees, cloudy

9pm: 14 degrees, cloudy

10pm: 14 degrees, cloudy

11pm: 13 degrees, cloudy

Saturday

1am: 12 degrees, partly cloudy

4am: 11 degrees, overcast

7am: 10 degrees, overcast

11am: 13 degrees, cloudy

2pm: 17 degrees, cloudy

5pm: 17 degrees, cloudy

8pm: 13 degrees, cloudy

11pm: 10 degrees, partly cloudy

Sunday

1am: 9 degrees, cloudy

4am: 8 degrees, cloudy

7am: 7 degrees, cloudy

10am: 10 degrees, cloudy

1pm: 12 degrees, cloudy

4pm: 12 degrees, cloudy

7pm: 11 degrees, cloudy

10pm: 8 degrees, clear

St Albans

Friday

3pm: 18 degrees, sunny intervals

4pm: 19 degrees, cloudy

5pm: 19 degrees, cloudy

6pm: 18 degrees, cloudy

7pm: 17 degrees, cloudy

8pm: 16 degrees, cloudy

9pm: 15 degrees, partly cloudy

10pm: 14 degrees, cloudy

11pm: 13 degrees, partly cloudy

Saturday

1am: 11 degrees, partly cloudy

4am: 11 degrees, overcast

7am: 10 degrees, cloudy

11am: 14 degrees, cloudy

2pm: 17 degrees, cloudy

5pm: 17 degrees, cloudy

8pm: 12 degrees, partly cloudy

11pm: 10 degrees, partly cloudy

Sunday

1am: 8 degrees, cloudy

4am: 7 degrees, cloudy

7am: 7 degrees, cloudy

10am: 9 degrees, cloudy

1pm: 12 degrees, cloudy

4pm: 12 degrees, cloudy

7pm: 10 degrees, cloudy

10pm: 8 degrees, clear

Welwyn Garden City

Friday

3pm: 18 degrees, sunny intervals

4pm: 19 degrees, cloudy

5pm: 19 degrees, cloudy

6pm: 18 degrees, cloudy

7pm: 17 degrees, cloudy

8pm: 15 degrees, cloudy

9pm: 14 degrees, cloudy

10pm: 13 degrees, cloudy

11pm: 13 degrees, cloudy

Saturday

1am: 12 degrees, partly cloudy

4am: 11 degrees, overcast

7am: 10 degrees, cloudy

11am: 14 degrees, cloudy

2pm: 17 degrees, cloudy

5pm: 17 degrees, cloudy

8pm: 13 degrees, partly cloudy

11pm: 10 degrees, partly cloudy

Sunday

1am: 9 degrees, partly cloudy

4am: 8 degrees, cloudy

7am: 7 degrees, cloudy

10am: 10 degrees, cloudy

1pm: 12 degrees, cloudy

4pm: 12 degrees, cloudy

7pm: 10 degrees, cloudy

10pm: 8 degrees, partly cloudy

Stevenage

Friday

3pm: 18 degrees, cloudy

4pm: 19 degrees, cloudy

5pm: 19 degrees, cloudy

6pm: 18 degrees, cloudy

7pm: 17 degrees, cloudy

8pm: 16 degrees, cloudy

9pm: 15 degrees, partly cloudy

10pm: 14 degrees, cloudy

11pm: 13 degrees, partly cloudy

Saturday

1am: 12 degrees, cloudy

4am: 11 degrees, cloudy

7am: 10 degrees, cloudy

11am: 14 degrees, cloudy

2pm: 17 degrees, cloudy

5pm: 17 degrees, cloudy

8pm: 13 degrees, partly cloudy

11pm: 10 degrees, partly cloudy

Sunday

1am: 9 degrees, partly cloudy

4am: 8 degrees, cloudy

7am: 7 degrees, cloudy

10am: 10 degrees, cloudy

1pm: 12 degrees, cloudy

4pm: 12 degrees, cloudy

7pm: 10 degrees, cloudy

10pm: 9 degrees, clear

Royston

Friday

3pm: 19 degrees, cloudy

4pm: 19 degrees, cloudy

5pm: 19 degrees, cloudy

6pm: 19 degrees, cloudy

7pm: 17 degrees, cloudy

8pm: 16 degrees, cloudy

9pm: 15 degrees, cloudy

10pm: 14 degrees, cloudy

11pm: 13 degrees, cloudy

Saturday

1am: 12 degrees, cloudy

4am: 11 degrees, cloudy

7am: 10 degrees, cloudy

11am: 14 degrees, cloudy

2pm: 16 degrees, cloudy

5pm: 17 degrees, cloudy

8pm: 13 degrees, partly cloudy

11pm: 10 degrees, partly cloudy

Sunday

1am: 9 degrees, cloudy

4am: 8 degrees, cloudy

7am: 7 degrees, cloudy

10am: 10 degrees, cloudy

1pm: 12 degrees, cloudy

4pm: 12 degrees, cloudy

7pm: 10 degrees, cloudy

10pm: 8 degrees, clear