Normally the average daily weather in London right through September is 15 with a normal high in the month being 19 with low temperatures being around 12. We have put some more information below:
| Month | Degrees Celsius |
|---|---|
| Temperature | 15 |
| High Temperature | 19 |
| Low Temperature | 12 |
| Sunshine Per Day | 6 |
Useful Links: London Weather: Average Weather & Yearly Climate