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Northern Ireland, temperatures in September
September in Northern Ireland is on average a mild month, with a minimum temperature of 9.6 °C, a maximum of 16.5 °C, and therefore a daily average of 13.1 °C.
The minimum temperature is normally recorded before dawn, the maximum in the early afternoon.
Map with average temperatures.
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Table with the average temperatures
Northern Ireland - Average temperatures in September|
| City | Min | Max | Mean |
|---|
| Ballypatrick Forest | 9.5 | 15.3 | 12.4 |
|---|
| Belfast | 9.9 | 16.6 | 13.2 |
|---|
| Castlederg | 8.7 | 16.8 | 12.8 |
|---|
| Derry | 10 | 16.9 | 13.5 |
|---|
| Glenanne | 9.4 | 16.1 | 12.8 |
|---|
| Helens Bay | 10.2 | 17.3 | 13.8 |
|---|
| Lisnaskea | 9.1 | 17.2 | 13.2 |
|---|
Lough Fea
(225 m.) | 8.8 | 15.2 | 12 |
|---|
| Portglenone | 9.5 | 16.5 | 13 |
|---|
| Portrush | 11.1 | 16.8 | 13.9 |
|---|
Average
Northern Ireland | 9.6 | 16.5 | 13.1 |
|---|
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