Generally the typical temperate in Dover right-through May is 9. You can expect a high of 13 and low being 8. We have provided a clearer breakdown here:
| Month | Degrees Celsius |
|---|---|
| Temperature | 9 |
| High Temperature | 13 |
| Low Temperature | 8 |
| Sunshine Per Day | 9 |
Useful Links: Dover Weather: Average Weather & Yearly Climate