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Weather in Blenheim for September 2025

Your guide to Blenheim weather in September - trends and predictions

    Temperatures

  • The forecast for the first days of September 2025 in Blenheim predicts temperatures to be around 14 °C, close to the historical average.

  • 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.

  • Rain 🌧️

  • The climate of Blenheim in September is notably wet, with an average of 13 rainy days, and a total of 101.9 mm of precipitation.

Average dry days
17
Dry days
Average rainy days
13
Rainy days
Average snowy days
0
Snow days
Average temperatures
13°/4°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
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

Click on a date for more information
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
15° /4° 0 mm 4
2 Sept. Sunny
Sunny
12° /3° 0 mm 4
3 Sept. Sunny
Sunny
14° /4° 0 mm 4
4 Sept. Sunny
Sunny
16° /3° 0 mm 4
5 Sept. Patchy rain possible
Patchy rain possible
13° /7° 0.1 mm 3
6 Sept. Partly cloudy
Partly cloudy
13° /3° 0 mm 4
7 Sept. Patchy rain possible
Patchy rain possible
16° /4° 7.7 mm 5
8 Sept. Sunny
Sunny
14° /3° 0 mm 4
9 Sept. Sunny
Sunny
14° /4° 3.2 mm 4
10 Sept. Light rain shower
Light rain shower
14° /5° 2 mm 5
11 Sept. Light rain shower
Light rain shower
12° /2° 14.9 mm 4
12 Sept. Overcast
Overcast
14° /2° 0 mm 4
13 Sept. Sunny
Sunny
13° /3° 2.9 mm 4
14 Sept. Overcast
Overcast
12° /3° 0.2 mm 4
15 Sept. Overcast
Overcast
13° /5° 0 mm 4
16 Sept. Partly cloudy
Partly cloudy
13° /4° 0.5 mm 4
17 Sept. Light rain shower
Light rain shower
13° /4° 3.9 mm 4
18 Sept. Partly cloudy
Partly cloudy
14° /0° 0 mm 5
19 Sept. Patchy rain possible
Patchy rain possible
13° /2° 0.6 mm 4
20 Sept. Partly cloudy
Partly cloudy
15° /4° 0.1 mm 5
21 Sept. Partly cloudy
Partly cloudy
15° /4° 0 mm 5
22 Sept. Light rain shower
Light rain shower
14° /4° 5 mm 4
23 Sept. Light rain shower
Light rain shower
14° /5° 5.7 mm 4
24 Sept. Light rain shower
Light rain shower
14° /4° 1.4 mm 4
25 Sept. Partly cloudy
Partly cloudy
12° /3° 0.1 mm 5
26 Sept. Patchy rain possible
Patchy rain possible
14° /4° 0.6 mm 4
27 Sept. Overcast
Overcast
12° /4° 0.2 mm 4
28 Sept. Patchy rain possible
Patchy rain possible
15° /2° 0.1 mm 5
29 Sept. Light rain shower
Light rain shower
14° /4° 0.6 mm 4
30 Sept. Patchy rain possible
Patchy rain possible
14° /4° 0.6 mm 4
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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.

Blenheim in September - FAQ

What are the expected maximum and minimum temperatures in Blenheim during September?
Prepare for cooler days with highs just around 13° and colder nights, dipping below 4°.
How much rainfall should be expected in Blenheim during September?
Significant rainfall exceeding 101.9 mm is expected in Blenheim during September, occurring over more than 13 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 💧

Quick links

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Location coordinates Where is Blenheim?

Get accurate weather forecasts for Blenheim, located at latitude -41.516 and longitude 173.953. Stay updated with localized weather information tailored for Blenheim.

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