Connacht
September
Weather in Connacht for September 2025
Your guide to Connacht weather in September - trends and predictions
In general, the average temperature in Connacht at the beginning of September is 19.3 °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 Connacht during September, with an average of 16 rainy days.
Is September a good time to visit Connacht? check out the best time to travel to Connacht page.
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14
Dry days
16
Rainy days
0
Snow days
17°/10°
Temperatures
30 km/h
Avg max wind
83 %
Avg humidity
Connacht in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  19° | 2  16° | 3 17° | 4 19° | 5 20° | 6 22° | 7 22° |
| 8 19° | 9 17° | 10 17° | 11 15° | 12  14° | 13  14° | 14 16° |
| 15 15° | 16 16° | 17  17° | 18 16° | 19 18° | 20 18° | 21 16° |
| 22 14° | 23 17° | 24  15° | 25 15° | 26 13° | 27 13° | 28 14° |
| 29 14° | 30 16° |
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Temperatures trend during September in Connacht
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 | 19° /12° | 1.8 mm | 4 | |
| 2 Sept. | Partly cloudy | 16° /11° | 0.4 mm | 4 | |
| 3 Sept. | Partly cloudy | 17° /11° | 0.3 mm | 5 | |
| 4 Sept. | Partly cloudy | 19° /11° | 0.3 mm | 5 | |
| 5 Sept. | Patchy rain possible | 20° /11° | 0.2 mm | 5 | |
| 6 Sept. | Patchy rain possible | 22° /14° | 1.1 mm | 6 | |
| 7 Sept. | Partly cloudy | 22° /14° | 0.4 mm | 6 | |
| 8 Sept. | Patchy rain possible | 19° /13° | 0.6 mm | 5 | |
| 9 Sept. | Patchy rain possible | 17° /12° | 0.3 mm | 4 | |
| 10 Sept. | Patchy rain possible | 17° /12° | 0.9 mm | 4 | |
| 11 Sept. | Light rain shower | 15° /9° | 1.2 mm | 4 | |
| 12 Sept. | Cloudy | 14° /8° | 0.2 mm | 4 | |
| 13 Sept. | Overcast | 14° /7° | 0.7 mm | 4 | |
| 14 Sept. | Overcast | 16° /10° | 0.8 mm | 4 | |
| 15 Sept. | Overcast | 15° /10° | 0.1 mm | 4 | |
| 16 Sept. | Cloudy | 16° /9° | 0 mm | 4 | |
| 17 Sept. | Light drizzle | 17° /11° | 2.2 mm | 5 | |
| 18 Sept. | Light rain shower | 16° /10° | 2.8 mm | 4 | |
| 19 Sept. | Light rain shower | 18° /10° | 11.1 mm | 5 | |
| 20 Sept. | Light rain shower | 18° /10° | 3.4 mm | 5 | |
| 21 Sept. | Light rain shower | 16° /10° | 3.2 mm | 4 | |
| 22 Sept. | Patchy rain possible | 14° /10° | 2.3 mm | 4 | |
| 23 Sept. | Patchy light drizzle | 17° /8° | 0.6 mm | 5 | |
| 24 Sept. | Moderate rain | 15° /10° | 7.1 mm | 4 | |
| 25 Sept. | Light rain shower | 15° /9° | 1.5 mm | 4 | |
| 26 Sept. | Light rain shower | 13° /8° | 12.1 mm | 4 | |
| 27 Sept. | Light rain shower | 13° /9° | 7.2 mm | 4 | |
| 28 Sept. | Light rain shower | 14° /10° | 6.7 mm | 4 | |
| 29 Sept. | Patchy rain possible | 14° /10° | 3.9 mm | 4 | |
| 30 Sept. | Light rain | 16° /10° | 3.6 mm | 4 | |
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Important Notice
Our weather forecast for Connacht 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 Connacht forecast closer to your planned date for the most up-to-date weather information.
Connacht in September - FAQ
What are the expected maximum and minimum temperatures in Connacht during September?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Connacht during September?
Significant rainfall exceeding 119.5 mm is expected in Connacht during September, occurring over more than 16 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Connacht during September?
The average wind speed in Connacht during September is 30 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Connacht in September?
As you prepare for your trip to Connacht 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 Connacht, 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
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