September Weather in Morrison, United States

Last updated: June 24, 2025

In September, the average temperature in Morrison, United States hovers around 20°C (69°F). Be prepared for a temperature range that can dip to a cool 4°C (39°F) at night, or soar to a warm 34°C (94°F) during the day. Expect 112 mm (4.4 in) of precipitation spread across about 9 days, and enjoy the lush ambiance created by an average humidity of 78%.

September Temperature in Morrison

In September in Morrison, the average temperature is 20°C (69°F). Maximum temperatures can reach 34°C (94°F), while the minimum can drop to as low as 4°C (39°F). This range makes it an ideal time to explore outdoor activities while being prepared for some cooler evenings.

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

The chart illustrates September temperature patterns in Morrison, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Morrison, September typically has an average temperature of 20°C (69°F), with highs reaching up to 34°C (94°F) and lows dropping to around 4°C (39°F).

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

September Precipitation in Morrison

In Morrison in September, the total precipitation amount is 112 mm (4.4 in), occurring over a span of 9 days.

September Precipitation Trends in Morrison

The chart displays monthly precipitation patterns in Morrison, 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 Morrison, September typically receives around 112 mm (4.4 inches) of precipitation spread over approximately 9 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 Morrison

In Morrison in September, humidity is 78%. With an average temperature of 20°C (69°F), this humidity feels like a warm, enveloping blanket, making travel somewhat uncomfortable as sweat clings to your skin and the air feels thick and heavy, urging you to seek out shaded areas and refreshing drinks.

September Average Humidity in Morrison

This chart illustrates the average monthly humidity levels in Morrison, 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 Morrison is approximately 78%, 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 Morrison

In Morrison in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Morrison.

Maximum UV Index Levels in Morrison for September

The chart shows the monthly maximum UV Index (UVI) for Morrison 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 Morrison typically reaches 8, which falls under the very high exposure category.

Data source: Morrison 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 Morrison Compares to Other Months

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

This table compares monthly weather conditions in Morrison, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (24°F)	57 mm (2.3 inches)	81%	moderate
February Weather	-3°C (26°F)	57 mm (2.3 inches)	81%	moderate
March Weather	4°C (40°F)	88 mm (3.5 inches)	81%	high
April Weather	9°C (49°F)	106 mm (4.2 inches)	82%	very high
May Weather	17°C (62°F)	146 mm (5.7 inches)	78%	very high
June Weather	23°C (73°F)	145 mm (5.7 inches)	81%	very high
July Weather	25°C (76°F)	93 mm (3.7 inches)	79%	very high
August Weather	23°C (74°F)	78 mm (3.1 inches)	77%	very high
September Weather	20°C (69°F)	112 mm (4.4 inches)	78%	very high
October Weather	12°C (54°F)	113 mm (4.4 inches)	78%	high
November Weather	4°C (39°F)	50 mm (2.0 inches)	87%	moderate
December Weather	0°C (32°F)	49 mm (1.9 inches)	84%	low