September Weather in Prospect, United States

Last updated: June 24, 2025

In September, the average temperature in Prospect, United States hovers around 24°C (76°F). Daily highs can soar to a sizzling 36°C (96°F), while the cooler nights might drop to a brisk 10°C (50°F). This month also sees 157 mm (6.2 in) of rainfall spread over 9 days, contributing to the relatively high average humidity of 79%.

September Temperature in Prospect

In September in Prospect, the average temperature is 24°C (76°F), with maximums reaching 36°C (96°F) and minimums dropping to as low as 10°C (50°F). This climate makes Prospect an ideal destination for travelers seeking warm weather while allowing for comfortable evenings.

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

The chart illustrates September temperature patterns in Prospect, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Prospect, September typically has an average temperature of 24°C (76°F), with highs reaching up to 36°C (96°F) and lows dropping to around 10°C (50°F).

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

September Precipitation in Prospect

In Prospect in September, the total precipitation amount is 157 mm (6.2 in) spread over 9 days.

September Precipitation Trends in Prospect

The chart displays monthly precipitation patterns in Prospect, 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 Prospect, September typically receives around 157 mm (6.2 inches) of precipitation spread over approximately 9 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 Prospect

In Prospect in September, humidity is 79%. With an average temperature of 24°C (76°F), this humidity feels like a thick blanket wrapped around you, making traveling somewhat uncomfortable and sticky, as you navigate through the warmth while constantly seeking shade and hydration.

September Average Humidity in Prospect

This chart illustrates the average monthly humidity levels in Prospect, 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 Prospect is approximately 79%, 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 Prospect

In Prospect 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 Prospect.

Maximum UV Index Levels in Prospect for September

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

Data source: Prospect 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 Prospect Compares to Other Months

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

This table compares monthly weather conditions in Prospect, 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 (46°F)	88 mm (3.5 inches)	85%	moderate
February Weather	11°C (52°F)	96 mm (3.8 inches)	82%	high
March Weather	13°C (56°F)	73 mm (2.9 inches)	81%	very high
April Weather	18°C (64°F)	99 mm (3.9 inches)	80%	very high
May Weather	23°C (73°F)	112 mm (4.4 inches)	81%	extreme
June Weather	25°C (78°F)	126 mm (5.0 inches)	81%	extreme
July Weather	27°C (81°F)	124 mm (4.9 inches)	81%	extreme
August Weather	27°C (80°F)	148 mm (5.8 inches)	80%	very high
September Weather	24°C (76°F)	157 mm (6.2 inches)	79%	very high
October Weather	20°C (68°F)	60 mm (2.3 inches)	80%	very high
November Weather	12°C (54°F)	79 mm (3.1 inches)	85%	high
December Weather	10°C (49°F)	120 mm (4.7 inches)	86%	moderate