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 in September brings notable rainfall, with an average of 16 rainy days and a total precipitation of 77 mm.
Temperatures
Rain 🌧️
14
Dry days
16
Rainy days
0
Snow days
16°/11°
Temperatures
26 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 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Connacht during September?
Moderate rainfall is anticipated in Connacht during September, with a total of 77 mm spread over approximately 16 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Connacht during September?
The average wind speed in Connacht during September is 26 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 💧
UV exposure in Connacht during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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