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September Weather in Knob Noster, United States

Last updated: June 24, 2025

In September, the average temperature in Knob Noster, United States hovers around 22°C (73°F), offering a pleasant climate for exploration. Expect varied temperatures, with a minimum of 5°C (41°F) and a maximum reaching up to 34°C (93°F). During this time, you can anticipate approximately 69 mm (2.7 in) of precipitation spread over 6 days, resulting in an average humidity of 72%.

September Temperature in Knob Noster

In September in Knob Noster, the average temperature is 22°C (73°F). Maximums can reach 34°C (93°F), while minimums can drop to as low as 5°C (41°F). This makes Knob Noster an ideal destination for travelers seeking a mix of warm and cool weather experiences.

September Weather in Knob Noster: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Knob Noster, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Knob Noster, September typically has an average temperature of 22°C (73°F), with highs reaching up to 34°C (93°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec323447556677807772584539
Data source: Temperature data for Knob Noster 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 Knob Noster

In Knob Noster in September, the precipitation amount is 69 mm (2.7 in) over a period of 6 days.

September Precipitation Trends in Knob Noster

The chart displays monthly precipitation patterns in Knob Noster, 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 Knob Noster, September typically receives around 69 mm (2.7 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec6356112104195108133100691014935
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Knob Noster

In Knob Noster in September, humidity is 72%. With an average temperature of 22°C (73°F), this humidity feels like a warm embrace, making it ideal for leisurely strolls but potentially uncomfortable for prolonged outdoor activities.

September Average Humidity in Knob Noster

This chart illustrates the average monthly humidity levels in Knob Noster, 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 Knob Noster is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%78%75%77%82%83%81%78%72%72%84%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Knob Noster

In Knob Noster 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 Knob Noster.

Maximum UV Index Levels in Knob Noster for September

The chart shows the monthly maximum UV Index (UVI) for Knob Noster 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 Knob Noster typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35610101111109643
Data source: Knob Noster 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 Knob Noster Compares to Other Months

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

This table compares monthly weather conditions in Knob Noster, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)63 mm (2.5 inches)80%moderate
February Weather1°C (34°F)56 mm (2.2 inches)78%moderate
March Weather8°C (47°F)112 mm (4.4 inches)75%high
April Weather13°C (55°F)103 mm (4.1 inches)77%very high
May Weather19°C (67°F)195 mm (7.7 inches)82%very high
June Weather25°C (77°F)108 mm (4.3 inches)83%extreme
July Weather27°C (80°F)133 mm (5.2 inches)81%extreme
August Weather25°C (77°F)100 mm (3.9 inches)78%very high
September Weather22°C (73°F)69 mm (2.7 inches)72%very high
October Weather14°C (58°F)101 mm (4.0 inches)72%high
November Weather7°C (45°F)49 mm (1.9 inches)84%moderate
December Weather4°C (39°F)35 mm (1.4 inches)86%moderate

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