September Weather in Arcadia, United States

Last updated: June 24, 2025

In September, the average temperature in Arcadia, United States reaches a pleasant 23°C (75°F). However, temperatures can vary significantly, with a minimum of 8°C (47°F) and a maximum soaring to 35°C (96°F). Expect 138 mm (5.4 in) of precipitation spread over 8 days, contributing to an average humidity level of 75%. It's a month of delightful warmth mixed with refreshing rain!

September Temperature in Arcadia

In September in Arcadia, the average temperature is 23°C (75°F). Maximums can reach 35°C (96°F) and minimums can be as low as 8°C (47°F). Overall, it's a great time to visit for those who enjoy warm weather with pleasant evenings.

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

The chart illustrates September temperature patterns in Arcadia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arcadia, September typically has an average temperature of 23°C (75°F), with highs reaching up to 35°C (96°F) and lows dropping to around 8°C (47°F).

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

September Precipitation in Arcadia

In Arcadia in September, the precipitation amount is 138 mm (5.4 in) spread over the course of 8 days.

September Precipitation Trends in Arcadia

The chart displays monthly precipitation patterns in Arcadia, 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 Arcadia, September typically receives around 138 mm (5.4 inches) of precipitation spread over approximately 8 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 Arcadia

In Arcadia in September humidity is 75%. With an average temperature of 23°C (75°F), this humidity feels like walking through a warm, damp blanket, which can make outdoor activities a bit sluggish but also lovely for exploring shaded areas and enjoying refreshing drinks.

September Average Humidity in Arcadia

This chart illustrates the average monthly humidity levels in Arcadia, 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 Arcadia is approximately 75%, 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 Arcadia

In Arcadia 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 Arcadia.

Maximum UV Index Levels in Arcadia for September

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

Data source: Arcadia 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 Arcadia Compares to Other Months

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

This table compares monthly weather conditions in Arcadia, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (44°F)	90 mm (3.6 inches)	86%	moderate
February Weather	9°C (49°F)	127 mm (5.0 inches)	85%	high
March Weather	12°C (54°F)	96 mm (3.8 inches)	84%	very high
April Weather	16°C (62°F)	121 mm (4.8 inches)	82%	very high
May Weather	21°C (71°F)	126 mm (5.0 inches)	83%	extreme
June Weather	25°C (77°F)	77 mm (3.0 inches)	82%	extreme
July Weather	27°C (81°F)	87 mm (3.4 inches)	80%	extreme
August Weather	26°C (79°F)	106 mm (4.2 inches)	74%	very high
September Weather	23°C (75°F)	138 mm (5.4 inches)	75%	very high
October Weather	18°C (65°F)	114 mm (4.5 inches)	79%	very high
November Weather	10°C (51°F)	93 mm (3.6 inches)	87%	high
December Weather	8°C (47°F)	120 mm (4.7 inches)	87%	moderate