Typically the weather in Kelso throughout the duration of September is 25. Throughout the month you should see a high of 32 and typical average low being around 21. Our table below has the full details:
| Month | Degrees Celsius |
|---|---|
| Temperature | 25 |
| High Temperature | 32 |
| Low Temperature | 21 |
Useful Links: Kelso Weather: Average Weather & Yearly Climate