Connacht (Galway)
September
Weather in Connacht for September 2026
Your guide to Connacht weather in September - trends and predictions
In general, the average temperature in Connacht at the beginning of September is 18.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.6 °C by the end of September.
Connacht experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 104.6 mm.
Temperatures
Rain 🌧️
4
Dry days
26
Rainy days
0
Snow days
16°/10°
Temperatures
28 km/h
Avg max wind
81 %
Avg humidity
Connacht Weather September
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What’s the Weather Like in Connacht This September?
Discover the average temperatures and weather trends across Connacht’s cities this September.
Temperatures trend during September in Connacht
See the weather trend as well as the moving average line
September weather in Connacht day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 18° /12° | 3.3 mm | 4 | |
| 2 Sept. | Patchy rain possible | 16° /11° | 0.5 mm | 4 | |
| 3 Sept. |  Partly cloudy | 16° /11° | 6.4 mm | 4 | |
| 4 Sept. | Partly cloudy | 18° /11° | 0.7 mm | 4 | |
| 5 Sept. | Patchy rain possible | 19° /11° | 0.2 mm | 5 | |
| 6 Sept. | Patchy rain possible | 21° /13° | 1.8 mm | 5 | |
| 7 Sept. | Partly cloudy | 20° /13° | 3.8 mm | 5 | |
| 8 Sept. | Patchy rain possible | 18° /12° | 1.3 mm | 4 | |
| 9 Sept. | Patchy rain possible | 17° /12° | 1.3 mm | 4 | |
| 10 Sept. | Light rain shower | 16° /12° | 4 mm | 4 | |
| 11 Sept. | Light rain shower | 14° /10° | 4.5 mm | 3 | |
| 12 Sept. |  Cloudy | 14° /8° | 5.9 mm | 3 | |
| 13 Sept. |  Overcast | 14° /8° | 3.6 mm | 3 | |
| 14 Sept. | Overcast | 16° /9° | 3.9 mm | 4 | |
| 15 Sept. | Overcast | 15° /11° | 3.9 mm | 3 | |
| 16 Sept. | Patchy rain possible | 16° /10° | 2.3 mm | 4 | |
| 17 Sept. |  Light drizzle | 17° /11° | 3.4 mm | 4 | |
| 18 Sept. | Light rain shower | 17° /10° | 5.9 mm | 4 | |
| 19 Sept. | Light rain shower | 17° /10° | 7.5 mm | 5 | |
| 20 Sept. | Light rain shower | 17° /10° | 3.4 mm | 4 | |
| 21 Sept. | Patchy rain possible | 15° /8° | 2.3 mm | 3 | |
| 22 Sept. | Patchy rain possible | 14° /8° | 1.5 mm | 4 | |
| 23 Sept. | Patchy light drizzle | 16° /7° | 0.4 mm | 4 | |
| 24 Sept. |  Moderate rain | 15° /9° | 4.7 mm | 4 | |
| 25 Sept. | Patchy rain possible | 15° /9° | 1 mm | 4 | |
| 26 Sept. | Light rain shower | 14° /8° | 8.1 mm | 4 | |
| 27 Sept. | Light rain shower | 14° /9° | 5.4 mm | 3 | |
| 28 Sept. | Patchy rain possible | 14° /10° | 5.3 mm | 3 | |
| 29 Sept. | Patchy rain possible | 14° /10° | 2.8 mm | 4 | |
| 30 Sept. | Light rain | 16° /11° | 5.5 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.
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Connacht in September - FAQ
What are the expected maximum and minimum temperatures in Connacht during September?
Enjoy moderate daytime temperatures of up to 16° 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 104.6 mm is expected in Connacht during September, occurring over more than 26 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 28 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Connacht
Explore the daily rainfall trends and prepare for Connachts September weather 💧
Typically, Connacht has 26 rainy days in September with a total of 104.6 mm of rainfall.
UV exposure in Connacht during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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