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Weather in Hermanus for September 2025

Your guide to Hermanus weather in September - trends and predictions

    Temperatures

  • So far, September 2025 in Hermanus is slightly warmer than the historical average by 0.8 °C.

  • The forecast for the next days in Hermanus predicts temperatures to be around 17 °C, close to the historical average.

  • In general, the average temperature in Hermanus at the beginning of September is 16.4 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 16.3 °C by the end of September.

    • Rain 🌧️

  • Hermanus experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 39.9 mm.

    • More

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Average dry days
22
Dry days
Average rainy days
8
Rainy days
Average snowy days
0
Snow days
Average temperatures
15°/11°
Temperatures
Average wind speed
30 km/h
Avg max wind
Average humidity
74 %
Avg humidity

Hermanus Weather September

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

Temperatures trend during September in Hermanus

See the weather trend as well as the moving average line

September weather in Hermanus day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
 18° /11° 0 mm 6
2 Sept. Sunny
Sunny
 20° /12° 0 mm 7
3 Sept. Partly cloudy
Partly cloudy
 16° /13° 0 mm 6
4 Sept. Patchy rain possible
Patchy rain possible
 15° /12° 0.1 mm 5
5 Sept. Patchy rain possible
Patchy rain possible
 15° /11° 0.7 mm 5
6 Sept. Patchy rain possible
Patchy rain possible
 15° /10° 0.1 mm 5
7 Sept. Partly cloudy
Partly cloudy
 16° /10° 0 mm 5
8 Sept. Patchy light drizzle
Patchy light drizzle
 16° /12° 0.9 mm 5
9 Sept. Patchy rain possible
Patchy rain possible
 16° /12° 0.2 mm 5
10 Sept. Sunny
Sunny
 19° /12° 0 mm 7
11 Sept. Sunny
Sunny
 17° /13° 0.3 mm 6
12 Sept. Light drizzle
Light drizzle
 16° /12° 0.7 mm 6
13 Sept. Overcast
Overcast
 16° /13° 0.2 mm 5
14 Sept. Overcast
Overcast
 16° /11° 0.1 mm 5
15 Sept. Patchy rain possible
Patchy rain possible
 18° /13° 1.6 mm 1.3
16 Sept. Patchy rain possible
Patchy rain possible
 14° /12° 4.2 mm 1.1
17 Sept. Patchy rain possible
Patchy rain possible
 14° /11° 0.4 mm 1.4
18 Sept. Patchy rain possible
Patchy rain possible
 15° /11° 0.2 mm 1.7
19 Sept. Partly cloudy
Partly cloudy
 19° /12° 0 mm 5
20 Sept. Patchy rain possible
Patchy rain possible
 18° /14° 0 mm 5
21 Sept. Patchy rain possible
Patchy rain possible
 19° /13° 2.3 mm 5
22 Sept. Patchy rain possible
Patchy rain possible
 16° /14° 2.2 mm 4
23 Sept. Sunny
Sunny
 16° /12° 0 mm 5
24 Sept. Sunny
Sunny
 16° /11° 0 mm 5
25 Sept. Patchy rain possible
Patchy rain possible
 17° /15° 0.1 mm 5
26 Sept. Sunny
Sunny
 20° /14° 0 mm 6
27 Sept. Sunny
Sunny
 20° /15° 0 mm 6
28 Sept. Light rain shower
Light rain shower
 15° /12° 9.1 mm 5
29 Sept. Light rain shower
Light rain shower
 13° /11° 6.9 mm 4
30 Sept. Light rain shower
Light rain shower
 13° /11° 9.3 mm 4
Next
Important Notice
Our weather forecast for Hermanus 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 Hermanus forecast closer to your planned date for the most up-to-date weather information.
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Hermanus in September - FAQ

What are the expected maximum and minimum temperatures in Hermanus during September?
During September, expect a variety of temperatures with highs around 15° and lows near 11°, suitable for diverse activities and preferences.
How much rainfall should be expected in Hermanus during September?
In September, Hermanus can expect light to moderate rainfall, totaling 39.9 mm across approximately 8 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Hermanus during September?
The average wind speed in Hermanus during September is 30 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Hermanus

Explore the daily rainfall trends and prepare for Hermanuss September weather 💧

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Location coordinates Where is Hermanus?

Get accurate weather forecasts for Hermanus, located at latitude -34.419 and longitude 19.234. Stay updated with localized weather information tailored for Hermanus.

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