City of Belfast (Belfast)
September
Weather in City of Belfast for September 2027
Your guide to City of Belfast weather in September - trends and predictions
In general, the average temperature in City of Belfast at the beginning of September is 17.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.9 °C by the end of September.
City of Belfast in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 109.5 mm.
Is September a good time to visit City of Belfast? check out the best time to travel to City of Belfast page.
✨ Is September a good time to visit City of Belfast? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
13
Dry days
17
Rainy days
0
Snow days
16°/9°
Temperatures
23 km/h
Avg max wind
84 %
Avg humidity
City of Belfast Weather September
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Temperatures trend during September in City of Belfast
See the weather trend as well as the moving average line
September weather in City of Belfast day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain | 16° /11° | 2.8 mm | 3 | |
| 2 Sept. | Light rain | 18° /10° | 3.1 mm | 3 | |
| 3 Sept. | Light rain | 16° /10° | 4.9 mm | 4 | |
| 4 Sept. |  Patchy rain possible | 17° /9° | 1.6 mm | 4 | |
| 5 Sept. |  Overcast | 18° /9° | 0 mm | 4 | |
| 6 Sept. |  Partly cloudy | 20° /12° | 0.3 mm | 4 | |
| 7 Sept. | Patchy rain possible | 19° /11° | 2.4 mm | 4 | |
| 8 Sept. | Partly cloudy | 18° /9° | 0.7 mm | 4 | |
| 9 Sept. | Overcast | 17° /10° | 0.6 mm | 4 | |
| 10 Sept. |  Moderate or heavy rain shower | 16° /10° | 7.3 mm | 3 | |
| 11 Sept. | Light rain | 15° /9° | 2.6 mm | 3 | |
| 12 Sept. | Light rain | 15° /8° | 3.9 mm | 3 | |
| 13 Sept. | Patchy rain possible | 14° /7° | 1.2 mm | 3 | |
| 14 Sept. | Light rain | 16° /10° | 3.4 mm | 3 | |
| 15 Sept. |  Moderate rain | 14° /9° | 7.8 mm | 3 | |
| 16 Sept. |  Cloudy | 16° /8° | 0.4 mm | 3 | |
| 17 Sept. | Light rain | 16° /10° | 8.5 mm | 3 | |
| 18 Sept. | Light rain | 16° /10° | 4.3 mm | 3 | |
| 19 Sept. | Light rain | 16° /10° | 3.9 mm | 3 | |
| 20 Sept. | Light rain shower | 15° /9° | 1.3 mm | 3 | |
| 21 Sept. | Light rain shower | 16° /8° | 0.6 mm | 3 | |
| 22 Sept. | Patchy rain possible | 15° /8° | 1.3 mm | 3 | |
| 23 Sept. | Light rain | 14° /7° | 2.6 mm | 3 | |
| 24 Sept. | Light rain | 15° /8° | 4.3 mm | 3 | |
| 25 Sept. | Patchy rain possible | 14° /9° | 1.6 mm | 3 | |
| 26 Sept. | Light rain | 14° /8° | 7.3 mm | 2.9 | |
| 27 Sept. | Moderate rain | 13° /7° | 16.9 mm | 2 | |
| 28 Sept. | Light rain shower | 14° /6° | 1.2 mm | 2.8 | |
| 29 Sept. | Patchy rain possible | 15° /8° | 1.4 mm | 2.7 | |
| 30 Sept. | Moderate rain | 14° /9° | 11.6 mm | 2.6 | |
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Important Notice
Our weather forecast for City of Belfast 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 City of Belfast forecast closer to your planned date for the most up-to-date weather information.
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City of Belfast in September - FAQ
What are the expected maximum and minimum temperatures in City of Belfast 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 City of Belfast during September?
Significant rainfall exceeding 109.5 mm is expected in City of Belfast during September, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in City of Belfast during September?
The average wind speed in City of Belfast during September is 23 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in City of Belfast
Explore the daily rainfall trends and prepare for City of Belfasts September weather 💧
Typically, City of Belfast has 17 rainy days in September with a total of 109.5 mm of rainfall.
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