Portrush
September
Weather in Portrush for September 2025
Your guide to Portrush weather in September - trends and predictions
The forecast for the next days in Portrush predicts temperatures to be around 16 °C, close to the historical average.
In general, the average temperature in Portrush at the beginning of September is 15.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 11.1 °C by the end of September.
Portrush in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 98 mm.
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Temperatures
Rain 🌧️
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13
Dry days
17
Rainy days
0
Snow days
14°/10°
Temperatures
26 km/h
Avg max wind
80 %
Avg humidity
Portrush Weather September
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Temperatures trend during September in Portrush
See the weather trend as well as the moving average line
September weather in Portrush day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Overcast | 16° /12° | 4.1 mm | 4 | |
| 2 Sept. |  Moderate rain at times | 16° /11° | 2.7 mm | 4 | |
| 3 Sept. | Moderate rain at times | 14° /10° | 5.4 mm | 3 | |
| 4 Sept. | Moderate or heavy rain shower | 15° /10° | 5.4 mm | 4 | |
| 5 Sept. |  Partly cloudy | 15° /11° | 0 mm | 4 | |
| 6 Sept. |  Sunny | 18° /14° | 0 mm | 5 | |
| 7 Sept. |  Moderate rain | 17° /12° | 8.1 mm | 0.3 | |
| 8 Sept. |  Patchy rain possible | 16° /9° | 1.3 mm | 0.9 | |
| 9 Sept. | Patchy rain possible | 16° /10° | 1 mm | 0.7 | |
| 10 Sept. | Moderate rain | 15° /11° | 5.9 mm | 0.4 | |
| 11 Sept. | Patchy rain possible | 14° /10° | 4 mm | 0.6 | |
| 12 Sept. | Patchy rain possible | 14° /10° | 0.6 mm | 3 | |
| 13 Sept. | Patchy rain possible | 14° /11° | 0.7 mm | 3 | |
| 14 Sept. | Patchy rain possible | 13° /10° | 4.7 mm | 3 | |
| 15 Sept. | Patchy rain possible | 14° /12° | 0.6 mm | 3 | |
| 16 Sept. | Patchy rain possible | 15° /11° | 0.2 mm | 3 | |
| 17 Sept. | Patchy rain possible | 12° /10° | 2.3 mm | 3 | |
| 18 Sept. | Patchy rain possible | 18° /13° | 0.1 mm | 4 | |
| 19 Sept. | Partly cloudy | 19° /15° | 0 mm | 5 | |
| 20 Sept. | Partly cloudy | 20° /15° | 0 mm | 5 | |
| 21 Sept. | Partly cloudy | 16° /12° | 0 mm | 5 | |
| 22 Sept. |  Cloudy | 15° /12° | 0 mm | 4 | |
| 23 Sept. | Moderate rain at times | 12° /11° | 2.1 mm | 3 | |
| 24 Sept. | Patchy rain possible | 12° /9° | 2.1 mm | 3 | |
| 25 Sept. | Overcast | 10° /7° | 0.6 mm | 3 | |
| 26 Sept. | Moderate or heavy rain shower | 10° /8° | 11.7 mm | 3 | |
| 27 Sept. | Patchy rain possible | 11° /9° | 1.1 mm | 3 | |
| 28 Sept. | Moderate rain at times | 12° /8° | 3.9 mm | 3 | |
| 29 Sept. | Overcast | 12° /8° | 0 mm | 3 | |
| 30 Sept. | Light rain shower | 11° /9° | 10 mm | 3 | |
| Next | |||||
Important Notice
Our weather forecast for Portrush in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Portrush forecast closer to your planned date for the most up-to-date weather information.
Change Month
Portrush in September - FAQ
What are the expected maximum and minimum temperatures in Portrush during September?
During September, expect a variety of temperatures with highs around 14° and lows near 10°, suitable for diverse activities and preferences.
How much rainfall should be expected in Portrush during September?
Moderate rainfall is anticipated in Portrush during September, with a total of 98 mm spread over approximately 17 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Portrush during September?
The average wind speed in Portrush during September is 26 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Portrush
Explore the daily rainfall trends and prepare for Portrushs September weather 💧
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