Lisburn and Castlereagh (Lisburn)
September
Weather in Lisburn and Castlereagh for September 2026
Your guide to Lisburn and Castlereagh weather in September - trends and predictions
In general, the average temperature in Lisburn and Castlereagh 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 and Castlereagh experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 109.4 mm.
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Temperatures
Rain 🌧️
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8
Dry days
22
Rainy days
0
Snow days
16°/8°
Temperatures
22 km/h
Avg max wind
85 %
Avg humidity
Lisburn and Castlereagh Weather September
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Temperatures trend during September in Lisburn and Castlereagh
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September weather in Lisburn and Castlereagh 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° /8° | 0.3 mm | 4 | |
| 17 Sept. |  Light rain | 17° /10° | 9.1 mm | 4 | |
| 18 Sept. | Light drizzle | 16° /8° | 4.3 mm | 4 | |
| 19 Sept. | Light rain | 17° /8° | 5.3 mm | 4 | |
| 20 Sept. | Light rain shower | 16° /8° | 1.9 mm | 4 | |
| 21 Sept. | Light rain shower | 14° /6° | 0.8 mm | 3 | |
| 22 Sept. | Light rain shower | 14° /6° | 1.1 mm | 3 | |
| 23 Sept. | Patchy rain possible | 15° /5° | 0.3 mm | 3 | |
| 24 Sept. | Light rain shower | 15° /8° | 4.8 mm | 4 | |
| 25 Sept. | Patchy rain possible | 14° /8° | 1.2 mm | 4 | |
| 26 Sept. | Light rain shower | 13° /7° | 8.2 mm | 3 | |
| 27 Sept. | Light rain shower | 13° /5° | 15.2 mm | 3 | |
| 28 Sept. | Light rain shower | 14° /6° | 1.7 mm | 3 | |
| 29 Sept. | Patchy rain possible | 14° /7° | 0.6 mm | 3 | |
| 30 Sept. | Light rain | 14° /8° | 8.5 mm | 3 | |
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Important Notice
Our weather forecast for Lisburn and Castlereagh 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 and Castlereagh forecast closer to your planned date for the most up-to-date weather information.
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Lisburn and Castlereagh in September - FAQ
What are the expected maximum and minimum temperatures in Lisburn and Castlereagh during September?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Lisburn and Castlereagh during September?
Significant rainfall exceeding 109.4 mm is expected in Lisburn and Castlereagh during September, occurring over more than 22 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Lisburn and Castlereagh during September?
The average wind speed in Lisburn and Castlereagh during September is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Lisburn and Castlereagh
Explore the daily rainfall trends and prepare for Lisburn and Castlereaghs September weather 💧
Typically, Lisburn and Castlereagh has 22 rainy days in September with a total of 109.4 mm of rainfall.
UV exposure in Lisburn and Castlereagh during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Lisburn and Castlereagh?Get accurate weather forecasts for Lisburn and Castlereagh, located at latitude 54.523 and longitude -6.035. Stay updated with localized weather information tailored for Lisburn and Castlereagh.
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