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New Zealand weather

Weather in Blenheim for September 2026

Your guide to Blenheim weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Blenheim at the beginning of September is 13.7 °C. As the month progressed, temperatures tended to remain steady, reaching an average of 13.7 °C by the end of September.

    • Rain 🌧️

  • The climate of Blenheim in September is notably wet, with an average of 15 rainy days, and a total of 86.7 mm of precipitation.

Average dry days
15
Dry days
Average rainy days
15
Rainy days
Average snowy days
0
Snow days
Average temperatures
13°/5°
Temperatures
Average wind speed
25 km/h
Avg max wind
Average humidity
76 %
Avg humidity

Blenheim Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Partly cloudy
14°
2
Sunny
14°
3
Overcast
14°
4
Partly cloudy
13°
5
Heavy rain
13°
6
Moderate or heavy rain shower
14°
7
Patchy rain possible
14°
8
Patchy rain possible
13°
9
Sunny
13°
10
Light rain shower
14°
11
Light rain shower
12°
12
Overcast
13°
13
Sunny
13°
14
Overcast
12°
15
Patchy rain possible
14°
16
Partly cloudy
14°
17
Light rain shower
13°
18
Partly cloudy
14°
19
Patchy rain possible
12°
20
Partly cloudy
14°
21
Partly cloudy
14°
22
Light rain shower
14°
23
Light rain shower
14°
24
Patchy rain possible
14°
25
Partly cloudy
13°
26
Patchy rain possible
14°
27
Overcast
13°
28
Patchy rain possible
15°
29
Light rain shower
14°
30
Patchy rain possible
13°

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
August October
Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
 14° /4° 0.6 mm 5
2 Sept. Sunny
Sunny
 14° /4° 0 mm 4
3 Sept. Overcast
Overcast
 14° /5° 0.8 mm 4
4 Sept. Partly cloudy
Partly cloudy
 13° /6° 4 mm 4
5 Sept. Heavy rain
Heavy rain
 13° /6° 19.7 mm 4
6 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 14° /5° 14.8 mm 4
7 Sept. Patchy rain possible
Patchy rain possible
 14° /5° 5.4 mm 4
8 Sept. Patchy rain possible
Patchy rain possible
 13° /4° 0.3 mm 4
9 Sept. Sunny
Sunny
 13° /5° 2.2 mm 4
10 Sept. Light rain shower
Light rain shower
 14° /6° 2.3 mm 4
11 Sept. Light rain shower
Light rain shower
 12° /4° 10.1 mm 4
12 Sept. Overcast
Overcast
 13° /4° 0.1 mm 4
13 Sept. Sunny
Sunny
 13° /4° 2 mm 4
14 Sept. Overcast
Overcast
 12° /4° 1.2 mm 4
15 Sept. Patchy rain possible
Patchy rain possible
 14° /6° 0 mm 4
16 Sept. Partly cloudy
Partly cloudy
 14° /6° 0.3 mm 5
17 Sept. Light rain shower
Light rain shower
 13° /7° 2.9 mm 4
18 Sept. Partly cloudy
Partly cloudy
 14° /3° 0.7 mm 4
19 Sept. Patchy rain possible
Patchy rain possible
 12° /3° 0.5 mm 3
20 Sept. Partly cloudy
Partly cloudy
 14° /4° 0 mm 4
21 Sept. Partly cloudy
Partly cloudy
 14° /6° 0.6 mm 5
22 Sept. Light rain shower
Light rain shower
 14° /6° 8 mm 4
23 Sept. Light rain shower
Light rain shower
 14° /7° 5.5 mm 4
24 Sept. Patchy rain possible
Patchy rain possible
 14° /6° 0.9 mm 4
25 Sept. Partly cloudy
Partly cloudy
 13° /5° 1 mm 4
26 Sept. Patchy rain possible
Patchy rain possible
 14° /6° 1.3 mm 4
27 Sept. Overcast
Overcast
 13° /6° 0.3 mm 4
28 Sept. Patchy rain possible
Patchy rain possible
 15° /5° 0.1 mm 5
29 Sept. Light rain shower
Light rain shower
 14° /6° 0.5 mm 4
30 Sept. Patchy rain possible
Patchy rain possible
 13° /5° 0.4 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.
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Blenheim in September - FAQ

What are the expected maximum and minimum temperatures in Blenheim during September?

During September, expect a variety of temperatures with highs around 13° and lows near 5°, suitable for diverse activities and preferences.

How much rainfall should be expected in Blenheim during September?

Moderate rainfall is anticipated in Blenheim during September, with a total of 86.7 mm spread over approximately 15 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in Blenheim during September?

The average wind speed in Blenheim during September is 25 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 💧
Typically, Blenheim has 15 rainy days in September with a total of 86.7 mm of rainfall.

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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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