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The temperatures in Hertfordshire in May are quite cold with temperatures between 8°C and 17°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Hertfordshire during the month of May. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Hertfordshire in May 2025.
If you’re planning to visit Hertfordshire in the near future, we highly recommend that you review the 14 day weather forecast for Hertfordshire before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 7° / 2° | 8 | 20 | 3 | 73 mm | Awful | Hertfordshire in January |
| February | 8° / 3° | 8 | 16 | 4 | 70 mm | Awful | Hertfordshire in February |
| March | 11° / 4° | 5 | 25 | 1 | 58 mm | Ok | Hertfordshire in March |
| April | 14° / 6° | 4 | 25 | 1 | 49 mm | Good | Hertfordshire in April |
| May | 17° / 8° | 5 | 26 | 0 | 65 mm | Good | Hertfordshire in May |
| June | 20° / 11° | 5 | 25 | 0 | 93 mm | Good | Hertfordshire in June |
| July | 22° / 14° | 5 | 26 | 0 | 75 mm | Good | Hertfordshire in July |
| August | 22° / 14° | 5 | 26 | 0 | 77 mm | Good | Hertfordshire in August |
| September | 20° / 12° | 4 | 26 | 0 | 50 mm | Good | Hertfordshire in September |
| October | 15° / 9° | 6 | 25 | 0 | 77 mm | Good | Hertfordshire in October |
| November | 11° / 6° | 7 | 23 | 0 | 72 mm | Bad | Hertfordshire in November |
| December | 8° / 4° | 8 | 21 | 2 | 86 mm | Awful | Hertfordshire in December |
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