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September Weather in Hayden, United States

Last updated: June 24, 2025

In Hayden, United States, the average temperature in September hovers around 15°C (60°F). While it can dip to a chilly -3°C (27°F), temperatures can also soar to a warm 33°C (91°F). Expect an average precipitation of 23 mm (0.9 in) over about 4 days, accompanied by a relative humidity of 63%.

September Temperature in Hayden

In September in Hayden, the average temperature is 15°C (60°F). Maximum temperatures can reach 33°C (91°F), while minimums can drop as low as -3°C (27°F). Be prepared for a wide range of temperatures when planning your trip to Hayden during this month.

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

The chart illustrates September temperature patterns in Hayden, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hayden, September typically has an average temperature of 15°C (60°F), with highs reaching up to 33°C (91°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec212432384962696759413222
Data source: Temperature data for Hayden 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 Hayden

In Hayden in September, the total precipitation amount is 23 mm (0.9 in) over a span of 4 days.

September Precipitation Trends in Hayden

The chart displays monthly precipitation patterns in Hayden, 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 Hayden, September typically receives around 23 mm (0.9 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec536957525920101423544459
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hayden

In Hayden in September humidity is 63%. With an average temperature of 15°C (60°F), this humidity feels like a mild chill in the air, making it pleasant for traveling but possibly damp enough to warrant a light jacket as you explore the sights.

September Average Humidity in Hayden

This chart illustrates the average monthly humidity levels in Hayden, 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 Hayden is approximately 63%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%86%75%67%67%68%62%63%63%72%80%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Hayden

In Hayden in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Hayden.

Maximum UV Index Levels in Hayden for September

The chart shows the monthly maximum UV Index (UVI) for Hayden 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 Hayden typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469111213121110753
Data source: Hayden 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 Hayden Compares to Other Months

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

This table compares monthly weather conditions in Hayden, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)53 mm (2.1 inches)84%moderate
February Weather-5°C (24°F)69 mm (2.7 inches)85%high
March Weather0°C (33°F)57 mm (2.2 inches)75%very high
April Weather3°C (38°F)52 mm (2.0 inches)67%extreme
May Weather9°C (49°F)59 mm (2.3 inches)67%extreme
June Weather17°C (62°F)20 mm (0.8 inches)68%extreme
July Weather21°C (70°F)10 mm (0.4 inches)62%extreme
August Weather20°C (68°F)14 mm (0.5 inches)63%extreme
September Weather15°C (60°F)23 mm (0.9 inches)63%very high
October Weather5°C (42°F)54 mm (2.1 inches)72%high
November Weather0°C (32°F)44 mm (1.7 inches)79%moderate
December Weather-6°C (22°F)59 mm (2.3 inches)85%moderate

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