Generally the typical temperate in Egham during the month of September is 14. Through the month the highs are about 20 and typical average low being around 12 degrees celsius. We have put some more detail below here:
| Month | Degrees Celsius |
|---|---|
| Temperature | 14 |
| High Temperature | 20 |
| Low Temperature | 12 |
Useful Links: Egham Weather: Average Weather & Yearly Climate