Average weather in Hemel Hempstead during the time of April is 9. You can expect a high of 15 and low around 6 celsius. The table below includes more detail:
| Month | Degrees Celsius |
|---|---|
| Temperature | 9 |
| High Temperature | 15 |
| Low Temperature | 6 |
Useful Links: Hemel Hempstead Weather: Average Weather & Yearly Climate