nomadseason

September Weather in Blackhawk, United States

Last updated: June 24, 2025

In Blackhawk, United States, the average temperature in September hovers around 17°C (62°F), making it a comfortable time of year. However, temperatures can swing from a chilly -2°C (28°F) at their lowest to a sweltering 38°C (101°F) at their peak. Expect about 39 mm (1.5 in) of precipitation spread across 6 days, and prepare for a 77% average humidity that may add a little stickiness to the air.

September Temperature in Blackhawk

In September in Blackhawk, the average temperature is 17°C (62°F), with maximums reaching 38°C (101°F) and minimums dropping to as low as -2°C (28°F). Travelers should be prepared for a wide range of temperatures and pack accordingly to fully enjoy their stay.

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

The chart illustrates September temperature patterns in Blackhawk, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Blackhawk, September typically has an average temperature of 17°C (62°F), with highs reaching up to 38°C (101°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec272236425367737062453730
Data source: Temperature data for Blackhawk generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Blackhawk

In Blackhawk in September, the precipitation amount is 39 mm (1.5 in), occurring over the course of 6 days.

September Precipitation Trends in Blackhawk

The chart displays monthly precipitation patterns in Blackhawk, 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 Blackhawk, September typically receives around 39 mm (1.5 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec1526406910371915139551528
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Blackhawk

In Blackhawk in September humidity is 77%. With an average temperature of 17°C (62°F), this humidity feels like a warm embrace, creating a lush, almost tropical atmosphere that can be quite stifling for traveling, making it essential to stay hydrated and take frequent breaks in the shade.

September Average Humidity in Blackhawk

This chart illustrates the average monthly humidity levels in Blackhawk, 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 Blackhawk is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%80%70%70%76%84%85%85%77%73%74%79%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Blackhawk

In Blackhawk 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 Blackhawk.

Maximum UV Index Levels in Blackhawk for September

The chart shows the monthly maximum UV Index (UVI) for Blackhawk 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 Blackhawk typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec345891110108532
Data source: Blackhawk 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 Blackhawk Compares to Other Months

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

This table compares monthly weather conditions in Blackhawk, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)15 mm (0.6 inches)77%moderate
February Weather-6°C (22°F)26 mm (1.0 inches)80%moderate
March Weather2°C (36°F)40 mm (1.6 inches)70%moderate
April Weather5°C (42°F)69 mm (2.7 inches)70%very high
May Weather12°C (54°F)103 mm (4.1 inches)76%very high
June Weather20°C (67°F)71 mm (2.8 inches)84%extreme
July Weather23°C (73°F)91 mm (3.6 inches)85%very high
August Weather21°C (70°F)51 mm (2.0 inches)84%very high
September Weather17°C (62°F)39 mm (1.5 inches)77%very high
October Weather7°C (45°F)55 mm (2.2 inches)73%moderate
November Weather3°C (37°F)14 mm (0.6 inches)74%moderate
December Weather-1°C (30°F)28 mm (1.1 inches)79%low

Compare Blackhawk's Climate with Cities Worldwide