Normally the average weather in Alnmouth in September is 10 with highs being 16 and lows around 7. See our table below for a full breakdown:
| Month | Degrees Celsius |
|---|---|
| Temperature | 10 |
| High Temperature | 16 |
| Low Temperature | 7 |
| Sunshine Per Day | 6 |
Useful Links: Alnmouth Weather: Average Weather & Yearly Climate