September Weather in Spencer, United States

Last updated: June 24, 2025

In Spencer, United States, the average temperature for September hovers around 21°C (70°F), with a comfortable humidity level of 73%. Expect temperature variations, with lows of 5°C (41°F) and possible highs reaching 35°C (96°F). Be prepared for some rain, as precipitation totals 105 mm (4.1 in) over approximately 8 days throughout the month.

September Temperature in Spencer

In September in Spencer, the average temperature is 21°C (70°F). Maximums can reach 35°C (96°F), while minimums can drop to as low as 5°C (41°F). This diverse range of temperatures makes it a great time to explore outdoor activities while being prepared for varying weather conditions.

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

The chart illustrates September temperature patterns in Spencer, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Spencer, September typically has an average temperature of 21°C (70°F), with highs reaching up to 35°C (96°F) and lows dropping to around 5°C (41°F).

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

September Precipitation in Spencer

In Spencer in September, the precipitation amount is 105 mm (4.1 in) over the course of 8 days.

September Precipitation Trends in Spencer

The chart displays monthly precipitation patterns in Spencer, 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 Spencer, September typically receives around 105 mm (4.1 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 Spencer

In Spencer in September, humidity is 73%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace that can make outdoor activities feel sweltering, so it's essential to stay hydrated and take breaks in the shade while exploring.

September Average Humidity in Spencer

This chart illustrates the average monthly humidity levels in Spencer, 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 Spencer is approximately 73%, 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 Spencer

In Spencer 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 Spencer.

Maximum UV Index Levels in Spencer for September

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

Data source: Spencer 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 Spencer Compares to Other Months

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

This table compares monthly weather conditions in Spencer, 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 (36°F)	102 mm (4.0 inches)	88%	moderate
February Weather	5°C (41°F)	148 mm (5.8 inches)	88%	moderate
March Weather	8°C (47°F)	117 mm (4.6 inches)	88%	high
April Weather	13°C (55°F)	139 mm (5.5 inches)	86%	very high
May Weather	18°C (65°F)	162 mm (6.4 inches)	82%	very high
June Weather	22°C (72°F)	170 mm (6.7 inches)	84%	very high
July Weather	24°C (76°F)	135 mm (5.3 inches)	82%	very high
August Weather	23°C (74°F)	126 mm (5.0 inches)	73%	very high
September Weather	21°C (70°F)	105 mm (4.1 inches)	73%	very high
October Weather	15°C (60°F)	119 mm (4.7 inches)	81%	high
November Weather	7°C (45°F)	82 mm (3.2 inches)	89%	moderate
December Weather	4°C (40°F)	124 mm (4.9 inches)	86%	moderate