September Weather in Clear Lake Riviera, United States

Last updated: June 24, 2025

In Clear Lake Riviera, United States, the average temperature in September hovers around 21°C (71°F), offering a pleasant climate. However, be prepared for fluctuations; temperatures can dip to a cool 6°C (42°F) or soar up to a scorching 40°C (105°F). Rainfall is minimal, with only 4 mm (0.1 in) expected over the course of just 1 day, while the air maintains an average humidity level of 68%.

September Temperature in Clear Lake Riviera

In September in Clear Lake Riviera, the average temperature is 21°C (71°F). Maximum temperatures can reach 40°C (105°F), while minimums can drop to as low as 6°C (42°F). It's essential to be prepared for a wide range of temperatures when traveling during this time.

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

The chart illustrates September temperature patterns in Clear Lake Riviera, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Clear Lake Riviera, September typically has an average temperature of 21°C (71°F), with highs reaching up to 40°C (105°F) and lows dropping to around 6°C (42°F).

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

September Precipitation in Clear Lake Riviera

In Clear Lake Riviera in September, the precipitation amount is 4 mm (0.1 in) over the course of 1 day.

September Precipitation Trends in Clear Lake Riviera

The chart displays monthly precipitation patterns in Clear Lake Riviera, 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 Clear Lake Riviera, September typically receives around 4 mm (0.1 inches) of precipitation spread over approximately 1 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 Clear Lake Riviera

In Clear Lake Riviera in September, humidity is 68%. With an average temperature of 21°C (71°F), this humidity feels like a warm embrace, making traveling a bit sticky but also inviting for leisurely strolls and outdoor adventures.

September Average Humidity in Clear Lake Riviera

This chart illustrates the average monthly humidity levels in Clear Lake Riviera, 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 Clear Lake Riviera 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 Clear Lake Riviera

In Clear Lake Riviera 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 Clear Lake Riviera.

Maximum UV Index Levels in Clear Lake Riviera for September

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

Data source: Clear Lake Riviera 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 Clear Lake Riviera Compares to Other Months

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

This table compares monthly weather conditions in Clear Lake Riviera, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (46°F)	144 mm (5.7 inches)	86%	moderate
February Weather	8°C (48°F)	157 mm (6.2 inches)	84%	moderate
March Weather	9°C (49°F)	104 mm (4.1 inches)	83%	high
April Weather	13°C (56°F)	50 mm (2.0 inches)	80%	very high
May Weather	16°C (62°F)	38 mm (1.5 inches)	80%	extreme
June Weather	22°C (71°F)	3 mm (0.1 inches)	76%	extreme
July Weather	25°C (78°F)	0 mm (0.0 inches)	70%	extreme
August Weather	25°C (77°F)	1 mm (0.0 inches)	66%	extreme
September Weather	21°C (71°F)	4 mm (0.1 inches)	68%	very high
October Weather	16°C (62°F)	42 mm (1.6 inches)	72%	high
November Weather	11°C (52°F)	57 mm (2.3 inches)	84%	moderate
December Weather	8°C (46°F)	94 mm (3.7 inches)	84%	moderate