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September Weather in Bonny Doon, United States

Last updated: June 24, 2025

In Bonny Doon, United States, the average temperature for September hovers around 16°C (61°F). Expect a minimum of 12°C (54°F) and a comfortable maximum of 26°C (79°F). With only 2 mm (0.1 in) of precipitation over 0 days, the weather promises to be dry and pleasant. Plus, with an average humidity of 55%, it’s an ideal time to enjoy the outdoors!

September Temperature in Bonny Doon

In September in Bonny Doon, the average temperature is 16°C (61°F). The maximum can reach 26°C (79°F) and the minimum can be as low as 12°C (54°F). This pleasant weather makes Bonny Doon an ideal destination for travelers seeking comfortable temperatures and a chance to explore outdoor activities.

September Weather in Bonny Doon: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Bonny Doon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bonny Doon, September typically has an average temperature of 16°C (61°F), with highs reaching up to 26°C (79°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec535252535457575961595654
Data source: Temperature data for Bonny Doon 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 Bonny Doon

In Bonny Doon in September, the precipitation amount is 2 mm (0.1 in) during a span of 0 days.

September Precipitation Trends in Bonny Doon

The chart displays monthly precipitation patterns in Bonny Doon, 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 Bonny Doon, September typically receives around 2 mm (0.1 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec13313091372232232954122
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bonny Doon

In Bonny Doon in September, humidity is 55%. With an average temperature of 16°C (61°F), this humidity feels like a refreshing breeze enveloping you, making it a pleasant time for traveling as long as you dress in layers to adapt to the mild conditions.

September Average Humidity in Bonny Doon

This chart illustrates the average monthly humidity levels in Bonny Doon, 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 Bonny Doon is approximately 55%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%82%78%71%64%59%54%55%62%78%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bonny Doon

In Bonny Doon in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Bonny Doon.

Maximum UV Index Levels in Bonny Doon for September

The chart shows the monthly maximum UV Index (UVI) for Bonny Doon 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 Bonny Doon typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec4589101111109753
Data source: Bonny Doon 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 Bonny Doon Compares to Other Months

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

This table compares monthly weather conditions in Bonny Doon, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (53°F)133 mm (5.2 inches)82%moderate
February Weather11°C (53°F)130 mm (5.1 inches)84%moderate
March Weather11°C (52°F)91 mm (3.6 inches)82%very high
April Weather12°C (54°F)37 mm (1.5 inches)78%very high
May Weather12°C (54°F)22 mm (0.8 inches)71%very high
June Weather14°C (57°F)3 mm (0.1 inches)64%extreme
July Weather14°C (58°F)2 mm (0.1 inches)58%extreme
August Weather15°C (60°F)2 mm (0.1 inches)54%very high
September Weather16°C (61°F)2 mm (0.1 inches)55%very high
October Weather15°C (60°F)29 mm (1.1 inches)62%high
November Weather14°C (57°F)54 mm (2.1 inches)78%moderate
December Weather12°C (54°F)122 mm (4.8 inches)80%moderate

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