September Weather in Hidden Valley Lake, United States

Last updated: June 24, 2025

In September, the average temperature in Hidden Valley Lake, United States hovers around 23°C (73°F), making it a pleasant time to visit. However, temperatures can vary widely, with a minimum of 7°C (45°F) and a scorching maximum of 43°C (110°F). Expect minimal rainfall, with only 2 mm (0.1 in) over 0 days, and enjoy the comfortable average humidity of 68%.

September Temperature in Hidden Valley Lake

In September in Hidden Valley Lake, the average temperature is 23°C (73°F). Maximum temperatures can reach 43°C (110°F), while minimums can drop to as low as 7°C (45°F). Travelers should prepare for a wide range of temperatures and pack accordingly for both warm days and cooler nights.

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

The chart illustrates September temperature patterns in Hidden Valley Lake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hidden Valley Lake, September typically has an average temperature of 23°C (73°F), with highs reaching up to 43°C (110°F) and lows dropping to around 7°C (45°F).

Data source: Temperature data for Hidden Valley Lake generated using information from the Copernicus Climate Change Service.

September Precipitation in Hidden Valley Lake

In Hidden Valley Lake in September, the precipitation amount is 2 mm (0.1 in) during a span of 0 days.

September Precipitation Trends in Hidden Valley Lake

The chart displays monthly precipitation patterns in Hidden Valley Lake, 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 Hidden Valley Lake, September typically receives around 2 mm (0.1 inches) of precipitation spread over approximately 0 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Hidden Valley Lake

In Hidden Valley Lake in September humidity is 68%. With an average temperature of 23°C (73°F), this humidity feels like a soft blanket wrapping around you, making every step outside feel a bit heavier, but offering a warm embrace that encourages leisurely exploration and a relaxed pace for travel.

September Average Humidity in Hidden Valley Lake

This chart illustrates the average monthly humidity levels in Hidden Valley Lake, 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 Hidden Valley Lake is approximately 68%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Hidden Valley Lake

In Hidden Valley Lake 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 Hidden Valley Lake.

Maximum UV Index Levels in Hidden Valley Lake for September

The chart shows the monthly maximum UV Index (UVI) for Hidden Valley Lake 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 Hidden Valley Lake typically reaches 9, which falls under the very high exposure category.

Data source: Hidden Valley Lake 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 Hidden Valley Lake Compares to Other Months

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

This table compares monthly weather conditions in Hidden Valley Lake, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (49°F)	132 mm (5.2 inches)	86%	moderate
February Weather	10°C (51°F)	140 mm (5.5 inches)	84%	moderate
March Weather	11°C (53°F)	90 mm (3.5 inches)	83%	high
April Weather	15°C (59°F)	36 mm (1.4 inches)	80%	very high
May Weather	19°C (66°F)	24 mm (0.9 inches)	80%	extreme
June Weather	24°C (75°F)	3 mm (0.1 inches)	76%	extreme
July Weather	26°C (79°F)	0 mm (0.0 inches)	70%	extreme
August Weather	25°C (78°F)	1 mm (0.0 inches)	66%	very high
September Weather	23°C (73°F)	2 mm (0.1 inches)	68%	very high
October Weather	18°C (65°F)	36 mm (1.4 inches)	72%	high
November Weather	12°C (55°F)	46 mm (1.8 inches)	84%	moderate
December Weather	9°C (48°F)	91 mm (3.6 inches)	84%	moderate