More often than not you can expect weather in Watford in May is 10. Average high degrees are usually 17 with lows around 7. The table below has some further insights:
| Month | Degrees Celsius |
|---|---|
| Temperature | 10 |
| High Temperature | 17 |
| Low Temperature | 7 |
| Sunshine Per Day | 7 |
Useful Links: Watford Weather: Average Weather & Yearly Climate