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September Weather in Blue Mounds, United States

Last updated: June 24, 2025

In Blue Mounds, United States, the average temperature in September hovers around 18°C (65°F), with a minimum dipping to 3°C (37°F) and a maximum reaching a warm 33°C (91°F). Expect 119 mm (4.7 in) of precipitation over approximately 10 days, contributing to an average humidity of 79%. Embrace the blend of warmth and moisture characteristic of this delightful month!

September Temperature in Blue Mounds

In September in Blue Mounds, the average temperature is 18°C (65°F), with maximums reaching 33°C (91°F) and minimums falling as low as 3°C (37°F). This makes it an ideal time for travelers who enjoy mild to warm weather, but it's wise to pack for both warm days and cooler evenings.

September Weather in Blue Mounds: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Blue Mounds, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Blue Mounds, September typically has an average temperature of 18°C (65°F), with highs reaching up to 33°C (91°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec212236466071757165513629
Data source: Temperature data for Blue Mounds 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 Blue Mounds

In Blue Mounds in September, the total precipitation amount is 119 mm (4.7 in) over the span of 10 days.

September Precipitation Trends in Blue Mounds

The chart displays monthly precipitation patterns in Blue Mounds, 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 Blue Mounds, September typically receives around 119 mm (4.7 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec50565893135123871131191174344
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Blue Mounds

In Blue Mounds in September, humidity is 79%. With an average temperature of 18°C (65°F), this humidity feels like walking through a warm mist, making traveling slightly uncomfortable and sticky, but offering a refreshing escape when you find moments of shade or a breeze.

September Average Humidity in Blue Mounds

This chart illustrates the average monthly humidity levels in Blue Mounds, 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 Blue Mounds is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%85%85%78%80%78%76%79%83%88%82%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Blue Mounds

In Blue Mounds 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 Blue Mounds.

Maximum UV Index Levels in Blue Mounds for September

The chart shows the monthly maximum UV Index (UVI) for Blue Mounds 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 Blue Mounds typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34589101098532
Data source: Blue Mounds 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 Blue Mounds Compares to Other Months

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

This table compares monthly weather conditions in Blue Mounds, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (21°F)50 mm (2.0 inches)85%moderate
February Weather-5°C (23°F)56 mm (2.2 inches)85%moderate
March Weather2°C (36°F)58 mm (2.3 inches)85%moderate
April Weather8°C (46°F)93 mm (3.7 inches)85%very high
May Weather15°C (60°F)135 mm (5.3 inches)78%very high
June Weather21°C (71°F)123 mm (4.9 inches)80%very high
July Weather24°C (75°F)87 mm (3.4 inches)78%very high
August Weather22°C (71°F)113 mm (4.4 inches)76%very high
September Weather18°C (65°F)119 mm (4.7 inches)79%very high
October Weather11°C (51°F)117 mm (4.6 inches)83%moderate
November Weather2°C (37°F)43 mm (1.7 inches)88%moderate
December Weather-2°C (29°F)44 mm (1.7 inches)81%low

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