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Weather in Hornsby for September 2025

Your guide to Hornsby weather in September - trends and predictions
  • In general, the average temperature in Hornsby at the beginning of September is 21.7 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 22.1 °C by the end of September.

  • Hornsby sees moderate rainfall in September, averaging 8 rainy days.

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Average dry days
22
Dry days
Average rainy days
8
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/11°
Temperatures
Average wind speed
19 km/h
Avg max wind
Average humidity
57 %
Avg humidity

Hornsby in September average weather

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Temperatures trend during September in Hornsby

See the weather trend as well as the moving average line

September weather day by day

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Date Weather Temperatures Rain UV More
1 Sept. Light rain shower
Light rain shower
20° /10° 1 mm 7
2 Sept. Cloudy
Cloudy
20° /9° 0.1 mm 6
3 Sept. Sunny
Sunny
17° /8° 0 mm 6
4 Sept. Partly cloudy
Partly cloudy
21° /7° 0 mm 7
5 Sept. Patchy rain possible
Patchy rain possible
24° /10° 0.8 mm 7
6 Sept. Sunny
Sunny
25° /11° 0 mm 8
7 Sept. Partly cloudy
Partly cloudy
25° /12° 0.1 mm 7
8 Sept. Patchy light rain
Patchy light rain
23° /11° 2.3 mm 7
9 Sept. Sunny
Sunny
21° /9° 0 mm 6
10 Sept. Sunny
Sunny
18° /7° 0 mm 6
11 Sept. Sunny
Sunny
21° /9° 0 mm 7
12 Sept. Partly cloudy
Partly cloudy
19° /10° 2.3 mm 6
13 Sept. Sunny
Sunny
19° /9° 0.3 mm 6
14 Sept. Sunny
Sunny
22° /8° 0.1 mm 7
15 Sept. Overcast
Overcast
21° /9° 0.2 mm 6
16 Sept. Sunny
Sunny
25° /9° 0 mm 8
17 Sept. Sunny
Sunny
25° /11° 0 mm 8
18 Sept. Sunny
Sunny
28° /10° 0 mm 9
19 Sept. Sunny
Sunny
29° /14° 0 mm 8
20 Sept. Sunny
Sunny
28° /14° 0 mm 8
21 Sept. Patchy rain possible
Patchy rain possible
22° /12° 0.2 mm 7
22 Sept. Light rain shower
Light rain shower
20° /11° 0.4 mm 6
23 Sept. Patchy rain possible
Patchy rain possible
23° /10° 0 mm 7
24 Sept. Partly cloudy
Partly cloudy
23° /10° 0 mm 7
25 Sept. Sunny
Sunny
27° /12° 0.1 mm 8
26 Sept. Patchy light drizzle
Patchy light drizzle
20° /11° 12.6 mm 6
27 Sept. Light rain shower
Light rain shower
18° /13° 2 mm 6
28 Sept. Patchy rain possible
Patchy rain possible
20° /13° 1.1 mm 6
29 Sept. Sunny
Sunny
24° /13° 0.7 mm 7
30 Sept. Sunny
Sunny
23° /12° 2 mm 7
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Important Notice
Our weather forecast for Hornsby 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 Hornsby forecast closer to your planned date for the most up-to-date weather information.

Hornsby in September - FAQ

What are the expected maximum and minimum temperatures in Hornsby during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Hornsby during September?
Expect minimal rainfall in Hornsby during September, with a total of 12.6 mm over approximately 8 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Hornsby during September?
The average wind speed in Hornsby during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Hornsby

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

UV exposure in Hornsby during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Hornsby?

Get accurate weather forecasts for Hornsby, located at latitude -33.702 and longitude 151.099. Stay updated with localized weather information tailored for Hornsby.

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