September Weather in Rolla, United States

Last updated: June 24, 2025

In September, the average temperature in Rolla, United States is a pleasant 22°C (72°F). While the temperatures can dip as low as 7°C (45°F) and soar to a warm 35°C (95°F), you'll generally enjoy comfortable weather. Expect 52 mm (2.1 in) of precipitation spread over about 6 days, with an average humidity of 68%. Perfect for experiencing the charm of the season!

September Temperature in Rolla

In September in Rolla, the average temperature is 22°C (72°F). The maximum can reach 35°C (95°F), while the minimum can drop to as low as 7°C (45°F). This diverse temperature range makes it a perfect time for travelers to enjoy both warm days and cooler evenings while exploring the sights.

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

The chart illustrates September temperature patterns in Rolla, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rolla, September typically has an average temperature of 22°C (72°F), with highs reaching up to 35°C (95°F) and lows dropping to around 7°C (45°F).

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

September Precipitation in Rolla

In Rolla in September, the precipitation amount is 52 mm (2.1 in) over the course of 6 days.

September Precipitation Trends in Rolla

The chart displays monthly precipitation patterns in Rolla, 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 Rolla, September typically receives around 52 mm (2.1 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Rolla

In Rolla in September humidity is 68%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, slightly stifling but still manageable for traveling, creating an atmosphere that encourages leisurely outdoor activities while prompting occasional breaks for refreshment.

September Average Humidity in Rolla

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

In Rolla 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 Rolla.

Maximum UV Index Levels in Rolla for September

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

Data source: Rolla 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 Rolla Compares to Other Months

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

This table compares monthly weather conditions in Rolla, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (34°F)	80 mm (3.1 inches)	83%	moderate
February Weather	2°C (37°F)	90 mm (3.6 inches)	81%	moderate
March Weather	9°C (48°F)	130 mm (5.1 inches)	80%	high
April Weather	13°C (55°F)	140 mm (5.5 inches)	80%	very high
May Weather	19°C (66°F)	179 mm (7.0 inches)	83%	very high
June Weather	24°C (76°F)	85 mm (3.3 inches)	83%	extreme
July Weather	26°C (79°F)	90 mm (3.5 inches)	76%	extreme
August Weather	24°C (76°F)	102 mm (4.0 inches)	69%	very high
September Weather	22°C (72°F)	52 mm (2.1 inches)	68%	very high
October Weather	15°C (59°F)	112 mm (4.4 inches)	72%	high
November Weather	7°C (45°F)	67 mm (2.6 inches)	83%	moderate
December Weather	4°C (40°F)	56 mm (2.2 inches)	86%	moderate