September Weather in Lower Lake, United States

Last updated: June 24, 2025

In Lower Lake, United States, the average temperature in September hovers around 23°C (74°F). Expect a range between a pleasant 6°C (43°F) and a scorching 42°C (109°F). With a mere 3 mm (0.1 in) of precipitation over 0 days, the humidity averages at a comfortable 68%, making it an ideal time to enjoy the great outdoors!

September Temperature in Lower Lake

In September in Lower Lake, the average temperature is 23°C (74°F). Maximums can reach 42°C (109°F), while minimums can drop as low as 6°C (43°F). Be prepared for a wide range of temperatures when traveling to Lower Lake during this time.

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

The chart illustrates September temperature patterns in Lower Lake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lower Lake, September typically has an average temperature of 23°C (74°F), with highs reaching up to 42°C (109°F) and lows dropping to around 6°C (43°F).

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

September Precipitation in Lower Lake

In Lower Lake in September, the precipitation amount is 3 mm (0.1 in) during a total of 0 days.

September Precipitation Trends in Lower Lake

The chart displays monthly precipitation patterns in Lower 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 Lower Lake, September typically receives around 3 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 Lower Lake

In Lower Lake in September, humidity is 68%. With an average temperature of 23°C (74°F), this humidity feels like a warm embrace, making traveling quite uncomfortable if you're not prepared. The air is thick and muggy, leaving you yearning for a cool breeze and frequent breaks in the shade.

September Average Humidity in Lower Lake

This chart illustrates the average monthly humidity levels in Lower 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 Lower 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 Lower Lake

In Lower 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 Lower Lake.

Maximum UV Index Levels in Lower Lake for September

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

Data source: Lower 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 Lower Lake Compares to Other Months

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

This table compares monthly weather conditions in Lower Lake, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	125 mm (4.9 inches)	86%	moderate
February Weather	10°C (50°F)	132 mm (5.2 inches)	84%	moderate
March Weather	11°C (51°F)	87 mm (3.4 inches)	83%	high
April Weather	14°C (58°F)	37 mm (1.5 inches)	80%	very high
May Weather	18°C (65°F)	30 mm (1.2 inches)	80%	extreme
June Weather	24°C (75°F)	4 mm (0.1 inches)	76%	extreme
July Weather	27°C (81°F)	0 mm (0.0 inches)	70%	extreme
August Weather	27°C (80°F)	1 mm (0.0 inches)	66%	very high
September Weather	23°C (74°F)	3 mm (0.1 inches)	68%	very high
October Weather	18°C (64°F)	33 mm (1.3 inches)	72%	high
November Weather	12°C (54°F)	44 mm (1.7 inches)	84%	moderate
December Weather	8°C (47°F)	85 mm (3.3 inches)	84%	moderate