Blenheim
September
Weather in Blenheim for September 2025
Your guide to Blenheim weather in September - trends and predictions
In general, the average temperature in Blenheim at the beginning of September is 14.1 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 13.6 °C by the end of September.
With an average of 5 rainy days, Blenheim experiences minimal rainfall in September.
Temperatures
Rain 🌧️
25
Dry days
5
Rainy days
0
Snow days
15°/2°
Temperatures
16 km/h
Avg max wind
77 %
Avg humidity
Blenheim Weather September
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Temperatures trend during September in Blenheim
See the weather trend as well as the moving average line
September weather in Blenheim day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Partly cloudy | 14° /2° | 0.8 mm | 5 | |
| 2 Sept. |  Sunny | 14° /2° | 0 mm | 5 | |
| 3 Sept. |  Overcast | 15° /4° | 1.2 mm | 4 | |
| 4 Sept. | Partly cloudy | 13° /4° | 5.9 mm | 4 | |
| 5 Sept. |  Heavy rain | 12° /3° | 24 mm | 4 | |
| 6 Sept. |  Moderate or heavy rain shower | 15° /5° | 19.5 mm | 5 | |
| 7 Sept. |  Patchy rain possible | 16° /4° | 7.7 mm | 5 | |
| 8 Sept. | Sunny | 14° /3° | 0 mm | 4 | |
| 9 Sept. | Sunny | 14° /4° | 3.2 mm | 4 | |
| 10 Sept. | Light rain shower | 14° /5° | 2 mm | 5 | |
| 11 Sept. | Light rain shower | 12° /2° | 14.9 mm | 4 | |
| 12 Sept. | Overcast | 14° /2° | 0 mm | 4 | |
| 13 Sept. | Sunny | 13° /3° | 2.9 mm | 4 | |
| 14 Sept. | Overcast | 12° /3° | 0.2 mm | 4 | |
| 15 Sept. | Overcast | 13° /5° | 0 mm | 4 | |
| 16 Sept. | Partly cloudy | 13° /4° | 0.5 mm | 4 | |
| 17 Sept. | Light rain shower | 13° /4° | 3.9 mm | 4 | |
| 18 Sept. | Partly cloudy | 14° /0° | 0 mm | 5 | |
| 19 Sept. | Patchy rain possible | 13° /2° | 0.6 mm | 4 | |
| 20 Sept. | Partly cloudy | 15° /4° | 0.1 mm | 5 | |
| 21 Sept. | Partly cloudy | 15° /4° | 0 mm | 5 | |
| 22 Sept. | Light rain shower | 14° /4° | 5 mm | 4 | |
| 23 Sept. | Light rain shower | 14° /5° | 5.7 mm | 4 | |
| 24 Sept. | Light rain shower | 14° /4° | 1.4 mm | 4 | |
| 25 Sept. | Partly cloudy | 12° /3° | 0.1 mm | 5 | |
| 26 Sept. | Patchy rain possible | 14° /4° | 0.6 mm | 4 | |
| 27 Sept. | Overcast | 12° /4° | 0.2 mm | 4 | |
| 28 Sept. | Patchy rain possible | 15° /2° | 0.1 mm | 5 | |
| 29 Sept. | Light rain shower | 14° /4° | 0.6 mm | 4 | |
| 30 Sept. | Patchy rain possible | 14° /4° | 0.6 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Blenheim 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 Blenheim forecast closer to your planned date for the most up-to-date weather information.
Change Month
Blenheim in September - FAQ
What are the expected maximum and minimum temperatures in Blenheim during September?
Prepare for cooler days with highs just around 15° and colder nights, dipping below 2°.
How much rainfall should be expected in Blenheim during September?
Significant rainfall exceeding 203.8 mm is expected in Blenheim during September, occurring over more than 5 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Blenheim during September?
The average wind speed in Blenheim during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Blenheim
Explore the daily rainfall trends and prepare for Blenheims September weather 💧
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