Lisburn
September
Weather in Lisburn for September 2025
Your guide to Lisburn weather in September - trends and predictions
Until now, September 2025 in Lisburn is slightly cooler than the historical average by -1.9 °C.
Expect cooler weather in the next days in Lisburn with the forecast suggesting a temperature of 14.3 °C, lower than the historical average.
In general, the average temperature in Lisburn at the beginning of September is 18.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.9 °C by the end of September.
Lisburn in September brings notable rainfall, with an average of 20 rainy days and a total precipitation of 100.2 mm.
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Temperatures
Rain 🌧️
More
10
Dry days
20
Rainy days
0
Snow days
16°/9°
Temperatures
22 km/h
Avg max wind
84 %
Avg humidity
Lisburn Weather September
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Temperatures trend during September in Lisburn
See the weather trend as well as the moving average line
September weather in Lisburn day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 16° /10° | 1.4 mm | 4 | |
| 2 Sept. | Light rain shower | 18° /9° | 3.7 mm | 4 | |
| 3 Sept. |  Partly cloudy | 16° /9° | 6.5 mm | 4 | |
| 4 Sept. |  Sunny | 18° /8° | 1.6 mm | 4 | |
| 5 Sept. | Partly cloudy | 19° /9° | 0 mm | 5 | |
| 6 Sept. | Patchy rain possible | 21° /12° | 0 mm | 5 | |
| 7 Sept. | Patchy rain possible | 20° /12° | 2.1 mm | 5 | |
| 8 Sept. |  Cloudy | 19° /10° | 0.8 mm | 4 | |
| 9 Sept. | Patchy rain possible | 18° /10° | 0.9 mm | 4 | |
| 10 Sept. |  Moderate or heavy rain shower | 17° /9° | 9.9 mm | 4 | |
| 11 Sept. | Light rain shower | 14° /8° | 3 mm | 3 | |
| 12 Sept. | Cloudy | 14° /6° | 1 mm | 3 | |
| 13 Sept. |  Mist | 14° /4° | 2.8 mm | 3 | |
| 14 Sept. |  Overcast | 16° /8° | 3 mm | 4 | |
| 15 Sept. |  Moderate rain | 13° /9° | 9.2 mm | 3 | |
| 16 Sept. | Patchy rain possible | 16° /10° | 1.2 mm | 0.8 | |
| 17 Sept. | Moderate rain | 17° /10° | 14 mm | 0.7 | |
| 18 Sept. | Moderate rain | 19° /9° | 9 mm | 0.2 | |
| 19 Sept. | Patchy rain possible | 15° /10° | 0.5 mm | 0.4 | |
| 20 Sept. | Patchy rain possible | 13° /8° | 2.9 mm | 0.2 | |
| 21 Sept. | Patchy rain possible | 11° /6° | 0.4 mm | 2 | |
| 22 Sept. | Partly cloudy | 12° /4° | 0 mm | 3 | |
| 23 Sept. | Patchy rain possible | 13° /4° | 0.5 mm | 2 | |
| 24 Sept. | Patchy rain possible | 16° /9° | 0.2 mm | 3 | |
| 25 Sept. | Partly cloudy | 15° /9° | 0.1 mm | 4 | |
| 26 Sept. | Moderate rain | 11° /9° | 8.6 mm | 3 | |
| 27 Sept. | Patchy rain possible | 14° /8° | 1.4 mm | 3 | |
| 28 Sept. | Sunny | 13° /8° | 0 mm | 3 | |
| 29 Sept. | Partly cloudy | 15° /7° | 0 mm | 4 | |
| 30 Sept. |  Light rain | 13° /8° | 10.3 mm | 3 | |
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Important Notice
Our weather forecast for Lisburn 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 Lisburn forecast closer to your planned date for the most up-to-date weather information.
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Lisburn in September - FAQ
What are the expected maximum and minimum temperatures in Lisburn during September?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 9°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Lisburn during September?
Significant rainfall exceeding 100.2 mm is expected in Lisburn during September, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Lisburn during September?
The average wind speed in Lisburn during September is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Lisburn
Explore the daily rainfall trends and prepare for Lisburns September weather 💧
UV exposure in Lisburn during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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