Regional District of Okanagan-Similkameen (Penticton)
September
Weather in Regional District of Okanagan-Similkameen for September 2025
Your guide to Regional District of Okanagan-Similkameen weather in September - trends and predictions
In general, the average temperature in Regional District of Okanagan-Similkameen at the beginning of September is 28.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.1 °C by the end of September.
Regional District of Okanagan-Similkameen experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 18.6 mm.
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Temperatures
Rain 🌧️
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23
Dry days
7
Rainy days
0
Snow days
22°/4°
Temperatures
11 km/h
Avg max wind
55 %
Avg humidity
Regional District of Okanagan-Similkameen in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  29° | 2  30° | 3 25° | 4  27° | 5 28° | 6  29° | 7 29° |
| 8 30° | 9 27° | 10 26° | 11 21° | 12 24° | 13 24° | 14 23° |
| 15 25° | 16 26° | 17 23° | 18  21° | 19 17° | 20  14° | 21 20° |
| 22 21° | 23 20° | 24 21° | 25  19° | 26 14° | 27 16° | 28  15° |
| 29 13° | 30 15° |
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Temperatures trend during September in Regional District of Okanagan-Similkameen
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September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Overcast | 29° /5° | 0 mm | 7 | |
| 2 Sept. | Partly cloudy | 30° /9° | 1.5 mm | 7 | |
| 3 Sept. | Overcast | 25° /6° | 0 mm | 6 | |
| 4 Sept. | Cloudy | 27° /3° | 0 mm | 7 | |
| 5 Sept. | Cloudy | 28° /4° | 0 mm | 7 | |
| 6 Sept. | Sunny | 29° /4° | 0 mm | 7 | |
| 7 Sept. | Sunny | 29° /4° | 0 mm | 7 | |
| 8 Sept. | Sunny | 30° /7° | 0 mm | 8 | |
| 9 Sept. | Sunny | 27° /10° | 0 mm | 7 | |
| 10 Sept. | Sunny | 26° /6° | 0 mm | 7 | |
| 11 Sept. | Overcast | 21° /4° | 2.5 mm | 5 | |
| 12 Sept. | Overcast | 24° /6° | 0 mm | 6 | |
| 13 Sept. | Overcast | 24° /0° | 0.1 mm | 6 | |
| 14 Sept. | Sunny | 23° /2° | 0.2 mm | 6 | |
| 15 Sept. | Sunny | 25° /4° | 0.3 mm | 6 | |
| 16 Sept. | Cloudy | 26° /4° | 0 mm | 6 | |
| 17 Sept. | Cloudy | 23° /8° | 0 mm | 6 | |
| 18 Sept. | Patchy rain possible | 21° /6° | 0.1 mm | 5 | |
| 19 Sept. | Overcast | 17° /4° | 0 mm | 5 | |
| 20 Sept. | Light freezing rain | 14° /-3° | 1.1 mm | 4 | |
| 21 Sept. | Sunny | 20° /1° | 0 mm | 5 | |
| 22 Sept. | Sunny | 21° /2° | 0 mm | 5 | |
| 23 Sept. | Patchy rain possible | 20° /5° | 0 mm | 5 | |
| 24 Sept. | Patchy rain possible | 21° /8° | 0 mm | 6 | |
| 25 Sept. | Light rain | 19° /3° | 3.2 mm | 5 | |
| 26 Sept. | Light freezing rain | 14° /3° | 1.4 mm | 4 | |
| 27 Sept. | Light freezing rain | 16° /3° | 2.2 mm | 4 | |
| 28 Sept. | Moderate or heavy rain with thunder | 15° /-1° | 5.8 mm | 4 | |
| 29 Sept. | Patchy rain possible | 13° /0° | 0.1 mm | 4 | |
| 30 Sept. | Patchy rain possible | 15° /-5° | 0 mm | 4 | |
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Important Notice
Our weather forecast for Regional District of Okanagan-Similkameen 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 Regional District of Okanagan-Similkameen forecast closer to your planned date for the most up-to-date weather information.
Regional District of Okanagan-Similkameen in September - FAQ
What are the expected maximum and minimum temperatures in Regional District of Okanagan-Similkameen during September?
During September, expect a variety of temperatures with highs around 22° and lows near 4°, suitable for diverse activities and preferences.
How much rainfall should be expected in Regional District of Okanagan-Similkameen during September?
Expect minimal rainfall in Regional District of Okanagan-Similkameen during September, with a total of 18.6 mm over approximately 7 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Regional District of Okanagan-Similkameen during September?
The average wind speed in Regional District of Okanagan-Similkameen during September is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Regional District of Okanagan-Similkameen
Explore the daily rainfall trends and prepare for Regional District of Okanagan-Similkameens September weather 💧
UV exposure in Regional District of Okanagan-Similkameen during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Regional District of Okanagan-Similkameen?Get accurate weather forecasts for Regional District of Okanagan-Similkameen, located at latitude 49.481 and longitude -119.586. Stay updated with localized weather information tailored for Regional District of Okanagan-Similkameen.
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