September Weather in Hollis, United States

Last updated: June 24, 2025

In Hollis, United States, the average temperature in September is a pleasant 19°C (66°F), with minimum temperatures dipping to 3°C (37°F) and soaring to a maximum of 34°C (94°F). During this time, expect around 77 mm (3.0 in) of precipitation spread over 8 days, contributing to an average humidity of 71%. Enjoy the balance of warmth and refreshing rain!

September Temperature in Hollis

In September in Hollis, the average temperature is 19°C (66°F). Maximum temperatures can reach up to 34°C (94°F), while minimums can drop as low as 3°C (37°F). It's a great time to visit for a mix of warm days and cool evenings.

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

The chart illustrates September temperature patterns in Hollis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hollis, September typically has an average temperature of 19°C (66°F), with highs reaching up to 34°C (94°F) and lows dropping to around 3°C (37°F).

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

September Precipitation in Hollis

In Hollis in September, the precipitation amount is 77 mm (3.0 in) distributed over 8 days.

September Precipitation Trends in Hollis

The chart displays monthly precipitation patterns in Hollis, 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 Hollis, September typically receives around 77 mm (3.0 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 Hollis

In Hollis in September humidity is 71%. With an average temperature of 19°C (66°F), this humidity feels like a warm, balmy embrace that enhances the tropical atmosphere, making it a perfect backdrop for leisurely strolls and outdoor adventures, though it may also lead to a slightly sticky feeling as you explore.

September Average Humidity in Hollis

This chart illustrates the average monthly humidity levels in Hollis, 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 Hollis is approximately 71%, 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 Hollis

In Hollis in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Hollis.

Maximum UV Index Levels in Hollis for September

The chart shows the monthly maximum UV Index (UVI) for Hollis 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 Hollis typically reaches 7, which falls under the high exposure category.

Data source: Hollis 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 Hollis Compares to Other Months

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

This table compares monthly weather conditions in Hollis, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (29°F)	71 mm (2.8 inches)	86%	moderate
February Weather	-1°C (31°F)	84 mm (3.3 inches)	84%	moderate
March Weather	2°C (37°F)	82 mm (3.2 inches)	82%	moderate
April Weather	9°C (48°F)	126 mm (5.0 inches)	80%	very high
May Weather	15°C (59°F)	81 mm (3.2 inches)	72%	very high
June Weather	20°C (69°F)	85 mm (3.3 inches)	72%	very high
July Weather	23°C (74°F)	136 mm (5.4 inches)	67%	very high
August Weather	23°C (73°F)	85 mm (3.4 inches)	66%	very high
September Weather	19°C (66°F)	77 mm (3.0 inches)	71%	high
October Weather	12°C (55°F)	128 mm (5.0 inches)	78%	high
November Weather	5°C (41°F)	98 mm (3.9 inches)	84%	moderate
December Weather	0°C (32°F)	120 mm (4.7 inches)	81%	low