Click on a day for an hourly weather forecast
The temperatures in St Helens in May are quite cold with temperatures between 7°C and 16°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in St Helens 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 St Helens in May 2025.
If you’re planning to visit St Helens in the near future, we highly recommend that you review the 14 day weather forecast for St Helens before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 6° / 2° | 8 | 18 | 5 | 72 mm | Awful | St Helens in January |
| February | 7° / 2° | 8 | 14 | 6 | 70 mm | Awful | St Helens in February |
| March | 10° / 3° | 6 | 23 | 2 | 61 mm | Bad | St Helens in March |
| April | 13° / 5° | 5 | 24 | 1 | 54 mm | Ok | St Helens in April |
| May | 16° / 7° | 5 | 26 | 0 | 80 mm | Good | St Helens in May |
| June | 19° / 10° | 6 | 24 | 0 | 98 mm | Good | St Helens in June |
| July | 21° / 13° | 5 | 26 | 0 | 87 mm | Good | St Helens in July |
| August | 21° / 13° | 6 | 25 | 0 | 84 mm | Good | St Helens in August |
| September | 19° / 11° | 3 | 27 | 0 | 48 mm | Good | St Helens in September |
| October | 14° / 9° | 6 | 25 | 0 | 77 mm | Good | St Helens in October |
| November | 10° / 5° | 7 | 22 | 0 | 71 mm | Bad | St Helens in November |
| December | 7° / 3° | 8 | 20 | 3 | 89 mm | Awful | St Helens in December |