September Weather in Occidental, United States

Last updated: June 24, 2025

In September, the average temperature in Occidental, United States hovers around 19°C (67°F). Visitors can expect minimums of 8°C (47°F) and maximums reaching up to 40°C (103°F). Precipitation is quite sparse, with only 2 mm (0.1 in) expected over 0 days. Additionally, the average humidity sits comfortably at 68%, making for a pleasant climate overall.

September Temperature in Occidental

In September in Occidental, the average temperature is 19°C (67°F). Maximums can reach 40°C (103°F), while minimums can drop to as low as 8°C (47°F). Be prepared for a wide range of temperatures to ensure a comfortable and enjoyable trip.

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

The chart illustrates September temperature patterns in Occidental, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Occidental, September typically has an average temperature of 19°C (67°F), with highs reaching up to 40°C (103°F) and lows dropping to around 8°C (47°F).

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

September Precipitation in Occidental

In Occidental in September, the precipitation amount is 2 mm (0.1 in) during a span of 0 days.

September Precipitation Trends in Occidental

The chart displays monthly precipitation patterns in Occidental, 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 Occidental, September typically receives around 2 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 Occidental

In Occidental in September, humidity is 68%. With an average temperature of 19°C (67°F), this humidity feels like a warm, enveloping blanket, making travel pleasant yet slightly muggy, which can be refreshing while exploring but may require occasional breaks to stay comfortable.

September Average Humidity in Occidental

This chart illustrates the average monthly humidity levels in Occidental, 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 Occidental 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 Occidental

In Occidental 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 Occidental.

Maximum UV Index Levels in Occidental for September

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

Data source: Occidental 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 Occidental Compares to Other Months

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

This table compares monthly weather conditions in Occidental, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (50°F)	140 mm (5.5 inches)	86%	moderate
February Weather	10°C (51°F)	157 mm (6.2 inches)	84%	moderate
March Weather	11°C (52°F)	96 mm (3.8 inches)	83%	high
April Weather	13°C (57°F)	47 mm (1.9 inches)	80%	very high
May Weather	16°C (60°F)	30 mm (1.2 inches)	80%	very high
June Weather	19°C (67°F)	2 mm (0.1 inches)	76%	extreme
July Weather	20°C (68°F)	0 mm (0.0 inches)	70%	extreme
August Weather	20°C (68°F)	0 mm (0.0 inches)	66%	very high
September Weather	19°C (67°F)	2 mm (0.1 inches)	68%	very high
October Weather	16°C (62°F)	43 mm (1.7 inches)	72%	high
November Weather	12°C (54°F)	61 mm (2.4 inches)	84%	moderate
December Weather	9°C (49°F)	102 mm (4.0 inches)	84%	moderate