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September Weather in Tonka Bay, United States

Last updated: June 24, 2025

In Tonka Bay, United States, the average temperature in September hovers around 18°C (64°F), with a minimum dipping to 2°C (35°F) and a maximum reaching 33°C (91°F). Expect about 115 mm (4.5 in) of precipitation spread over 10 days, accompanied by an average humidity of 81%. Whether you’re exploring the outdoors or lounging indoors, be prepared for a diverse climate experience!

September Temperature in Tonka Bay

In September in Tonka Bay, the average temperature is 18°C (64°F). Maximums can reach 33°C (91°F), and minimums can be as low as 2°C (35°F). It's advisable to pack layers to accommodate the warm days and cooler nights when traveling during this time.

September Weather in Tonka Bay: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Tonka Bay, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tonka Bay, 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 (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec161733435972757164483323
Data source: Temperature data for Tonka Bay 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 Tonka Bay

In Tonka Bay in September, the precipitation amount is 115 mm (4.5 in) over a span of 10 days.

September Precipitation Trends in Tonka Bay

The chart displays monthly precipitation patterns in Tonka Bay, 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 Tonka Bay, September typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec2631568612084101146115973447
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Tonka Bay

In Tonka Bay 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 Tonka Bay

This chart illustrates the average monthly humidity levels in Tonka Bay, 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 Tonka Bay 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 Tonka Bay

In Tonka Bay in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Tonka Bay.

Maximum UV Index Levels in Tonka Bay for September

The chart shows the monthly maximum UV Index (UVI) for Tonka Bay 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 Tonka Bay typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910997532
Data source: Tonka Bay 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 Tonka Bay Compares to Other Months

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

This table compares monthly weather conditions in Tonka Bay, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (17°F)26 mm (1.0 inches)87%low
February Weather-9°C (17°F)31 mm (1.2 inches)90%moderate
March Weather0°C (33°F)56 mm (2.2 inches)85%moderate
April Weather6°C (43°F)86 mm (3.4 inches)84%high
May Weather15°C (59°F)120 mm (4.7 inches)78%very high
June Weather22°C (72°F)84 mm (3.3 inches)80%very high
July Weather24°C (75°F)101 mm (4.0 inches)81%very high
August Weather22°C (71°F)146 mm (5.7 inches)81%very high
September Weather18°C (64°F)115 mm (4.5 inches)81%high
October Weather9°C (48°F)97 mm (3.8 inches)84%moderate
November Weather1°C (33°F)34 mm (1.4 inches)88%moderate
December Weather-5°C (23°F)47 mm (1.9 inches)84%low

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