September Weather in Nipomo, United States

Last updated: June 24, 2025

In September, the average temperature in Nipomo, United States is a pleasant 18°C (64°F). You can expect a range from a refreshing minimum of 11°C (52°F) to a warm maximum of 32°C (90°F). With only 1 mm (0.1 in) of precipitation over 0 days, it's a great time to enjoy outdoor activities. The air will feel comfortably humid, with an average humidity level of 70%.

September Temperature in Nipomo

In September in Nipomo, the average temperature is 18°C (64°F), with maximums reaching 32°C (90°F) and minimums dropping to as low as 11°C (52°F). This pleasant weather makes it an ideal time for travelers to explore and enjoy outdoor activities.

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

The chart illustrates September temperature patterns in Nipomo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nipomo, September typically has an average temperature of 18°C (64°F), with highs reaching up to 32°C (90°F) and lows dropping to around 11°C (52°F).

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

September Precipitation in Nipomo

In Nipomo in September, the precipitation amount is 1 mm (0.1 in) during 0 days, indicating a very dry period.

September Precipitation Trends in Nipomo

The chart displays monthly precipitation patterns in Nipomo, 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 Nipomo, September typically receives around 1 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 Nipomo

In Nipomo in September humidity is 70%. With an average temperature of 18°C (64°F), this humidity feels like a sticky embrace, making outdoor excursions a bit more cumbersome and requiring frequent breaks to stay refreshed and hydrated.

September Average Humidity in Nipomo

This chart illustrates the average monthly humidity levels in Nipomo, 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 Nipomo is approximately 70%, 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 Nipomo

In Nipomo in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Nipomo.

Maximum UV Index Levels in Nipomo for September

The chart shows the monthly maximum UV Index (UVI) for Nipomo 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 Nipomo typically reaches 10, which falls under the very high exposure category.

Data source: Nipomo 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 Nipomo Compares to Other Months

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

This table compares monthly weather conditions in Nipomo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	100 mm (3.9 inches)	80%	moderate
February Weather	12°C (53°F)	81 mm (3.2 inches)	83%	high
March Weather	12°C (54°F)	88 mm (3.5 inches)	80%	very high
April Weather	13°C (57°F)	24 mm (1.0 inches)	76%	very high
May Weather	14°C (58°F)	12 mm (0.5 inches)	75%	extreme
June Weather	16°C (61°F)	2 mm (0.1 inches)	74%	extreme
July Weather	18°C (64°F)	1 mm (0.0 inches)	75%	extreme
August Weather	18°C (65°F)	1 mm (0.0 inches)	72%	extreme
September Weather	18°C (64°F)	1 mm (0.1 inches)	70%	very high
October Weather	17°C (63°F)	10 mm (0.4 inches)	70%	high
November Weather	14°C (58°F)	33 mm (1.3 inches)	74%	moderate
December Weather	12°C (54°F)	72 mm (2.8 inches)	76%	moderate