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September Weather in Dundas, United States

Last updated: June 24, 2025

The average temperature in Dundas, United States during September is a pleasant 18°C (64°F). However, temperatures can vary significantly, with a minimum of 2°C (36°F) and a maximum reaching up to 33°C (91°F). Rainfall contributes to the climate, with an average precipitation amount of 127 mm (5.0 in) spread over 10 days. Additionally, the region experiences a high average humidity of 81%, adding to the overall atmosphere.

September Temperature in Dundas

In September in Dundas, the average temperature is 18°C (64°F). Maximums can reach 33°C (91°F), and minimums can be as low as 2°C (36°F). This makes Dundas a great destination for travelers looking to experience a range of temperatures, from warm days to cooler nights.

September Weather in Dundas: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Dundas, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dundas, September typically has an average temperature of 18°C (64°F), with highs reaching up to 33°C (91°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec171733435971747064483424
Data source: Temperature data for Dundas generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Dundas

In Dundas in September, the precipitation amount is 127 mm (5.0 in), spread over a period of 10 days.

September Precipitation Trends in Dundas

The chart displays monthly precipitation patterns in Dundas, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Dundas, September typically receives around 127 mm (5.0 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec34396388142107107127127913749
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Dundas

In Dundas in September, humidity is 81%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, making travel both refreshing and slightly stifling at the same time.

September Average Humidity in Dundas

This chart illustrates the average monthly humidity levels in Dundas, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Dundas is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%90%85%84%78%80%81%81%81%84%88%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Dundas

In Dundas in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Dundas.

Maximum UV Index Levels in Dundas for September

The chart shows the monthly maximum UV Index (UVI) for Dundas in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Dundas typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35589101098532
Data source: Dundas September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Dundas Compares to Other Months

Weather in Dundas varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Dundas, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Dundas, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (17°F)34 mm (1.3 inches)87%moderate
February Weather-8°C (17°F)39 mm (1.5 inches)90%moderate
March Weather1°C (34°F)63 mm (2.5 inches)85%moderate
April Weather6°C (44°F)88 mm (3.4 inches)84%very high
May Weather15°C (59°F)142 mm (5.6 inches)78%very high
June Weather22°C (71°F)107 mm (4.2 inches)80%very high
July Weather23°C (74°F)107 mm (4.2 inches)81%very high
August Weather21°C (71°F)127 mm (5.0 inches)81%very high
September Weather18°C (64°F)127 mm (5.0 inches)81%very high
October Weather9°C (49°F)91 mm (3.6 inches)84%moderate
November Weather1°C (34°F)37 mm (1.5 inches)88%moderate
December Weather-4°C (24°F)49 mm (1.9 inches)84%low

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