Dublin City (Dublin)
September
Weather in Dublin City for September 2025
Your guide to Dublin City weather in September - trends and predictions
In general, the average temperature in Dublin City at the beginning of September is 17.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.3 °C by the end of September.
Expect significant rainfall in Dublin City during September, with an average of 20 rainy days.
Is September a good time to visit Dublin City? check out the best time to travel to Dublin City page.
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10
Dry days
20
Rainy days
0
Snow days
17°/12°
Temperatures
24 km/h
Avg max wind
84 %
Avg humidity
Dublin City in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  17° | 2  17° | 3  18° | 4  17° | 5  17° | 6  19° | 7 19° |
| 8  19° | 9 18° | 10 16° | 11  15° | 12 14° | 13 15° | 14 17° |
| 15 14° | 16 16° | 17 16° | 18  15° | 19 16° | 20 16° | 21 15° |
| 22 14° | 23 15° | 24 15° | 25 14° | 26 14° | 27 14° | 28 15° |
| 29 14° | 30 14° |
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Temperatures trend during September in Dublin City
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Light rain shower | 17° /13° | 0.4 mm | 4 | |
| 2 Sept. | Cloudy | 17° /12° | 3.1 mm | 4 | |
| 3 Sept. | Overcast | 18° /11° | 0.3 mm | 4 | |
| 4 Sept. | Sunny | 17° /10° | 1.2 mm | 5 | |
| 5 Sept. | Mist | 17° /12° | 4.3 mm | 4 | |
| 6 Sept. | Partly cloudy | 19° /15° | 0 mm | 5 | |
| 7 Sept. | Light rain shower | 19° /14° | 4.1 mm | 5 | |
| 8 Sept. | Moderate or heavy rain shower | 19° /13° | 11 mm | 5 | |
| 9 Sept. | Patchy rain possible | 18° /12° | 1.1 mm | 5 | |
| 10 Sept. | Light rain shower | 16° /12° | 8.1 mm | 4 | |
| 11 Sept. | Moderate rain | 15° /11° | 8.2 mm | 4 | |
| 12 Sept. | Partly cloudy | 14° /7° | 0.2 mm | 4 | |
| 13 Sept. | Overcast | 15° /7° | 0.2 mm | 4 | |
| 14 Sept. | Overcast | 17° /10° | 3.6 mm | 5 | |
| 15 Sept. | Moderate rain | 14° /11° | 18.9 mm | 4 | |
| 16 Sept. | Light rain shower | 16° /10° | 3.3 mm | 4 | |
| 17 Sept. | Light rain shower | 16° /13° | 6.2 mm | 5 | |
| 18 Sept. | Light drizzle | 15° /11° | 0.2 mm | 4 | |
| 19 Sept. | Light rain shower | 16° /12° | 2.2 mm | 5 | |
| 20 Sept. | Patchy rain possible | 16° /11° | 1.2 mm | 4 | |
| 21 Sept. | Patchy rain possible | 15° /11° | 0.7 mm | 4 | |
| 22 Sept. | Light rain shower | 14° /10° | 3.3 mm | 3 | |
| 23 Sept. | Patchy rain possible | 15° /9° | 2.9 mm | 4 | |
| 24 Sept. | Light rain | 15° /11° | 3.8 mm | 4 | |
| 25 Sept. | Overcast | 14° /10° | 0 mm | 4 | |
| 26 Sept. | Light rain shower | 14° /10° | 4.6 mm | 4 | |
| 27 Sept. | Light rain shower | 14° /8° | 11.2 mm | 4 | |
| 28 Sept. | Light drizzle | 15° /9° | 1.4 mm | 4 | |
| 29 Sept. | Patchy rain possible | 14° /10° | 9.2 mm | 4 | |
| 30 Sept. | Moderate rain | 14° /9° | 10.6 mm | 4 | |
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Important Notice
Our weather forecast for Dublin City 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 Dublin City forecast closer to your planned date for the most up-to-date weather information.
Dublin City in September - FAQ
What are the expected maximum and minimum temperatures in Dublin City during September?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Dublin City during September?
Significant rainfall exceeding 179.8 mm is expected in Dublin City during September, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Dublin City during September?
The average wind speed in Dublin City during September is 24 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Dublin City in September?
As you prepare for your trip to Dublin City in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Dublin City, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Dublin City
Explore the daily rainfall trends and prepare for Dublin Citys September weather 💧
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