September Weather in Clearwater, United States

Last updated: June 24, 2025

In Clearwater, United States, the average temperature in September is a pleasant 23°C (74°F), creating an inviting atmosphere. However, be prepared for a temperature range that can dip to a chilly 6°C (43°F) at night and soar to a scorching 36°C (98°F) during the day. Precipitation is moderate, with around 76 mm (3.0 in) expected over 7 days, while the average humidity hovers around 67%. Enjoy the diverse weather of this vibrant locale!

September Temperature in Clearwater

In September in Clearwater, the average temperature is 23°C (74°F). The maximum can reach 36°C (98°F), while the minimum can drop to as low as 6°C (43°F). This diverse range of temperatures makes it an ideal destination for travelers who enjoy both warm days and cooler evenings.

September Weather in Clearwater: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Clearwater, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Clearwater, September typically has an average temperature of 23°C (74°F), with highs reaching up to 36°C (98°F) and lows dropping to around 6°C (43°F).

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

September Precipitation in Clearwater

In Clearwater in September, the precipitation amount is 76 mm (3.0 in) over a period of 7 days.

September Precipitation Trends in Clearwater

The chart displays monthly precipitation patterns in Clearwater, 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 Clearwater, September typically receives around 76 mm (3.0 inches) of precipitation spread over approximately 7 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Clearwater

In Clearwater in September humidity is 67%. With an average temperature of 23°C (74°F), this humidity feels like a warm embrace, making outdoor exploration pleasant yet slightly sticky, perfect for leisurely strolls but requiring occasional breaks for hydration.

September Average Humidity in Clearwater

This chart illustrates the average monthly humidity levels in Clearwater, 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 Clearwater is approximately 67%, 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 Clearwater

In Clearwater 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 Clearwater.

Maximum UV Index Levels in Clearwater for September

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

Data source: Clearwater 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 Clearwater Compares to Other Months

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

This table compares monthly weather conditions in Clearwater, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (35°F)	36 mm (1.4 inches)	75%	moderate
February Weather	2°C (35°F)	29 mm (1.2 inches)	76%	high
March Weather	10°C (49°F)	81 mm (3.2 inches)	67%	high
April Weather	13°C (56°F)	76 mm (3.0 inches)	70%	very high
May Weather	19°C (67°F)	160 mm (6.3 inches)	82%	very high
June Weather	26°C (78°F)	102 mm (4.0 inches)	82%	extreme
July Weather	27°C (81°F)	63 mm (2.5 inches)	81%	extreme
August Weather	26°C (79°F)	80 mm (3.1 inches)	76%	very high
September Weather	23°C (74°F)	76 mm (3.0 inches)	67%	very high
October Weather	15°C (59°F)	117 mm (4.6 inches)	72%	high
November Weather	8°C (46°F)	26 mm (1.0 inches)	80%	moderate
December Weather	4°C (40°F)	31 mm (1.2 inches)	83%	moderate