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September Weather in Cascade Valley, United States

Last updated: June 24, 2025

In September, the average temperature in Cascade Valley, United States is a pleasant 19°C (67°F). Temperatures can vary significantly, dipping to a minimum of 4°C (39°F) and soaring to a maximum of 38°C (100°F). With an average humidity of 60% and a precipitation amount of 13 mm (0.5 in) over just two days, be prepared for a balanced mix of sunny and rainy moments!

September Temperature in Cascade Valley

In September in Cascade Valley, the average temperature is 19°C (67°F), with maximums reaching up to 38°C (100°F) and minimums dropping as low as 4°C (39°F). This diverse temperature range makes Cascade Valley an ideal destination for travelers seeking both warmth and cooler respite during their visit.

September Weather in Cascade Valley: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Cascade Valley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cascade Valley, September typically has an average temperature of 19°C (67°F), with highs reaching up to 38°C (100°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec323344536472797867514133
Data source: Temperature data for Cascade Valley 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 Cascade Valley

In Cascade Valley in September, the precipitation amount is 13 mm (0.5 in) over a span of 2 days.

September Precipitation Trends in Cascade Valley

The chart displays monthly precipitation patterns in Cascade Valley, 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 Cascade Valley, September typically receives around 13 mm (0.5 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec433427261371313313834
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Cascade Valley

In Cascade Valley in September humidity is 60%. With an average temperature of 19°C (67°F), this humidity feels like a gentle embrace, making for a comfortable and pleasant experience while traveling.

September Average Humidity in Cascade Valley

This chart illustrates the average monthly humidity levels in Cascade Valley, 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 Cascade Valley is approximately 60%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%86%82%77%79%77%62%60%80%87%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Cascade Valley

In Cascade Valley 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 Cascade Valley.

Maximum UV Index Levels in Cascade Valley for September

The chart shows the monthly maximum UV Index (UVI) for Cascade Valley 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 Cascade Valley typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2356891097532
Data source: Cascade Valley 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 Cascade Valley Compares to Other Months

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

This table compares monthly weather conditions in Cascade Valley, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)43 mm (1.7 inches)85%low
February Weather1°C (33°F)34 mm (1.3 inches)86%moderate
March Weather7°C (44°F)27 mm (1.1 inches)86%moderate
April Weather12°C (53°F)26 mm (1.0 inches)82%high
May Weather18°C (65°F)13 mm (0.5 inches)77%very high
June Weather22°C (72°F)7 mm (0.3 inches)79%very high
July Weather26°C (79°F)1 mm (0.0 inches)77%very high
August Weather26°C (78°F)3 mm (0.1 inches)62%very high
September Weather19°C (67°F)13 mm (0.5 inches)60%high
October Weather11°C (52°F)31 mm (1.2 inches)80%moderate
November Weather5°C (41°F)38 mm (1.5 inches)87%moderate
December Weather1°C (33°F)34 mm (1.4 inches)86%low

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