Portlaoise
September
Weather in Portlaoise for September 2026
Your guide to Portlaoise weather in September - trends and predictions
In general, the average temperature in Portlaoise at the beginning of September is 16.3 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 13.6 °C by the end of September.
Portlaoise in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 82.6 mm.
Temperatures
Rain 🌧️
13
Dry days
17
Rainy days
0
Snow days
15°/8°
Temperatures
19 km/h
Avg max wind
83 %
Avg humidity
Portlaoise Weather September
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Temperatures trend during September in Portlaoise
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September weather in Portlaoise day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 15° /9° | 3.2 mm | 4 | |
| 2 Sept. | Patchy rain possible | 18° /7° | 0 mm | 4 | |
| 3 Sept. |  Moderate rain | 14° /10° | 23.2 mm | 3 | |
| 4 Sept. | Light rain shower | 17° /8° | 1.1 mm | 4 | |
| 5 Sept. | Patchy rain possible | 17° /8° | 0 mm | 4 | |
| 6 Sept. | Patchy rain possible | 18° /10° | 0.2 mm | 4 | |
| 7 Sept. | Light rain shower | 15° /7° | 2.2 mm | 4 | |
| 8 Sept. | Patchy rain possible | 16° /6° | 0.2 mm | 4 | |
| 9 Sept. |  Overcast | 16° /9° | 2.2 mm | 4 | |
| 10 Sept. |  Moderate rain at times | 14° /9° | 2.8 mm | 4 | |
| 11 Sept. | Moderate rain at times | 12° /7° | 2.8 mm | 3 | |
| 12 Sept. | Patchy rain possible | 13° /5° | 1.7 mm | 3 | |
| 13 Sept. | Overcast | 12° /4° | 5.3 mm | 3 | |
| 14 Sept. | Moderate rain at times | 17° /8° | 3.3 mm | 4 | |
| 15 Sept. | Patchy rain possible | 15° /9° | 3.2 mm | 4 | |
| 16 Sept. |  Cloudy | 17° /8° | 1.8 mm | 4 | |
| 17 Sept. |  Sunny | 19° /9° | 2.2 mm | 5 | |
| 18 Sept. | Sunny | 18° /8° | 2.3 mm | 5 | |
| 19 Sept. | Sunny | 18° /9° | 5.6 mm | 5 | |
| 20 Sept. | Overcast | 17° /8° | 2.6 mm | 4 | |
| 21 Sept. | Cloudy | 15° /6° | 2.1 mm | 4 | |
| 22 Sept. | Patchy rain possible | 13° /7° | 0.6 mm | 3 | |
| 23 Sept. | Patchy rain possible | 15° /6° | 0.1 mm | 4 | |
| 24 Sept. | Patchy rain possible | 15° /6° | 0.2 mm | 4 | |
| 25 Sept. | Moderate or heavy rain shower | 13° /5° | 6.5 mm | 4 | |
| 26 Sept. | Moderate or heavy rain shower | 13° /6° | 8.1 mm | 4 | |
| 27 Sept. | Patchy rain possible | 13° /5° | 5.2 mm | 3 | |
| 28 Sept. | Patchy rain possible | 14° /4° | 0.7 mm | 4 | |
| 29 Sept. | Moderate or heavy rain shower | 14° /7° | 3.4 mm | 4 | |
| 30 Sept. | Light rain shower | 13° /7° | 3.5 mm | 4 | |
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Important Notice
Our weather forecast for Portlaoise 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 Portlaoise forecast closer to your planned date for the most up-to-date weather information.
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Portlaoise in September - FAQ
What are the expected maximum and minimum temperatures in Portlaoise during September?
During September, expect a variety of temperatures with highs around 15° and lows near 8°, suitable for diverse activities and preferences.
How much rainfall should be expected in Portlaoise during September?
Moderate rainfall is anticipated in Portlaoise during September, with a total of 82.6 mm spread over approximately 17 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Portlaoise during September?
The average wind speed in Portlaoise during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Portlaoise
Explore the daily rainfall trends and prepare for Portlaoises September weather 💧
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