September Weather in Sibley, United States

Last updated: June 24, 2025

In Sibley, United States, the average temperature in September hovers around 18°C (65°F). Expect a range with minimums dipping to 3°C (38°F) and maximums soaring to 32°C (91°F). With an average precipitation total of 106 mm (4.2 in) spread across 9 rainy days, the humidity level remains relatively high at 75%, making for a humid climate. Prepare accordingly!

September Temperature in Sibley

In September in Sibley, the average temperature is 18°C (65°F). Maximums can reach 32°C (91°F) and minimums can be as low as 3°C (38°F). It's a great time for travelers to enjoy a mix of warm days and cooler nights, making it ideal for outdoor activities and sightseeing.

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

The chart illustrates September temperature patterns in Sibley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sibley, September typically has an average temperature of 18°C (65°F), with highs reaching up to 32°C (91°F) and lows dropping to around 3°C (38°F).

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

September Precipitation in Sibley

In Sibley in September, the total precipitation amount is 106 mm (4.2 in), spread over the course of 9 days.

September Precipitation Trends in Sibley

The chart displays monthly precipitation patterns in Sibley, 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 Sibley, September typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 9 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 Sibley

In Sibley in September, humidity is 75%. With an average temperature of 18°C (65°F), this humidity feels like a warm, enveloping blanket that can make outdoor exploration feel a bit stifling, potentially leading to discomfort during travel activities.

September Average Humidity in Sibley

This chart illustrates the average monthly humidity levels in Sibley, 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 Sibley is approximately 75%, 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 Sibley

In Sibley 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 Sibley.

Maximum UV Index Levels in Sibley for September

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

Data source: Sibley 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 Sibley Compares to Other Months

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

This table compares monthly weather conditions in Sibley, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (19°F)	27 mm (1.1 inches)	80%	moderate
February Weather	-8°C (18°F)	30 mm (1.2 inches)	84%	moderate
March Weather	1°C (35°F)	66 mm (2.6 inches)	75%	high
April Weather	7°C (44°F)	89 mm (3.5 inches)	79%	very high
May Weather	15°C (59°F)	126 mm (5.0 inches)	74%	very high
June Weather	22°C (72°F)	119 mm (4.7 inches)	81%	extreme
July Weather	23°C (74°F)	85 mm (3.4 inches)	82%	very high
August Weather	21°C (71°F)	106 mm (4.2 inches)	80%	very high
September Weather	18°C (65°F)	106 mm (4.2 inches)	75%	very high
October Weather	9°C (48°F)	89 mm (3.5 inches)	77%	moderate
November Weather	1°C (34°F)	28 mm (1.1 inches)	85%	moderate
December Weather	-3°C (26°F)	40 mm (1.6 inches)	83%	moderate