September Weather in Emerson, United States

Last updated: June 24, 2025

In September, the average temperature in Emerson, United States hovers around 20°C (68°F). However, be prepared for fluctuations, with minimums dipping to 4°C (40°F) and maximums soaring to 34°C (94°F). Expect 86 mm (3.4 in) of precipitation spread over 9 days, creating a moderately humid atmosphere with an average humidity level of 75%.

September Temperature in Emerson

In September in Emerson, the average temperature is 20°C (68°F). Maximum temperatures can reach 34°C (94°F), while minimums can drop to as low as 4°C (40°F). This diverse temperature range makes Emerson an ideal destination for travelers who enjoy a mix of warm and cool weather experiences.

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

The chart illustrates September temperature patterns in Emerson, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Emerson, September typically has an average temperature of 20°C (68°F), with highs reaching up to 34°C (94°F) and lows dropping to around 4°C (40°F).

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

September Precipitation in Emerson

In Emerson in September, the precipitation amount is 86 mm (3.4 in), falling over the course of 9 days.

September Precipitation Trends in Emerson

The chart displays monthly precipitation patterns in Emerson, 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 Emerson, September typically receives around 86 mm (3.4 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 Emerson

In Emerson in September, humidity is 75%. With an average temperature of 20°C (68°F), this humidity feels like a warm, muggy embrace that can leave travelers feeling sticky and exhausted.

September Average Humidity in Emerson

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

In Emerson 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 Emerson.

Maximum UV Index Levels in Emerson for September

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

Data source: Emerson 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 Emerson Compares to Other Months

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

This table compares monthly weather conditions in Emerson, 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 (23°F)	29 mm (1.2 inches)	80%	moderate
February Weather	-5°C (23°F)	28 mm (1.1 inches)	84%	moderate
March Weather	4°C (39°F)	83 mm (3.3 inches)	75%	high
April Weather	9°C (48°F)	72 mm (2.8 inches)	79%	very high
May Weather	16°C (61°F)	143 mm (5.6 inches)	74%	very high
June Weather	23°C (74°F)	105 mm (4.1 inches)	81%	extreme
July Weather	25°C (77°F)	67 mm (2.6 inches)	82%	very high
August Weather	23°C (73°F)	112 mm (4.4 inches)	80%	very high
September Weather	20°C (68°F)	86 mm (3.4 inches)	75%	very high
October Weather	10°C (51°F)	77 mm (3.0 inches)	77%	high
November Weather	3°C (38°F)	26 mm (1.0 inches)	85%	moderate
December Weather	-2°C (29°F)	43 mm (1.7 inches)	83%	low