September Weather in Congress, United States

Last updated: June 24, 2025

In Congress, United States, the average temperature in September reaches a pleasant 26°C (79°F). However, be prepared for a temperature range that can dip to a cool 8°C (47°F) and soar up to a sizzling 40°C (103°F). Expect 27 mm (1.0 in) of precipitation spread over 3 days, accompanied by an average humidity level of 48%.

September Temperature in Congress

In September in Congress, the average temperature is a warm 26°C (79°F). Maximum temperatures can reach a scorching 40°C (103°F), while minimums can drop to a cool 8°C (47°F). Be prepared for a mix of warm days and cooler nights when traveling to Congress during this month.

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

The chart illustrates September temperature patterns in Congress, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Congress, September typically has an average temperature of 26°C (79°F), with highs reaching up to 40°C (103°F) and lows dropping to around 8°C (47°F).

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

September Precipitation in Congress

In Congress in September, the precipitation amount is 27 mm (1.0 in) over the course of 3 days.

September Precipitation Trends in Congress

The chart displays monthly precipitation patterns in Congress, 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 Congress, September typically receives around 27 mm (1.0 inches) of precipitation spread over approximately 3 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 Congress

In Congress in September humidity is 48%. With average temperature 26°C (79°F), this humidity feels like a warm, pleasant embrace that enhances the tropical atmosphere, making it a perfect setting for leisurely strolls and outdoor explorations.

September Average Humidity in Congress

This chart illustrates the average monthly humidity levels in Congress, 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 Congress is approximately 48%, 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 Congress

In Congress in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Congress.

Maximum UV Index Levels in Congress for September

The chart shows the monthly maximum UV Index (UVI) for Congress 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 Congress typically reaches 10, which falls under the very high exposure category.

Data source: Congress 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 Congress Compares to Other Months

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

This table compares monthly weather conditions in Congress, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	46 mm (1.8 inches)	77%	moderate
February Weather	9°C (48°F)	47 mm (1.8 inches)	80%	high
March Weather	12°C (55°F)	46 mm (1.8 inches)	68%	very high
April Weather	18°C (64°F)	5 mm (0.2 inches)	58%	extreme
May Weather	22°C (71°F)	8 mm (0.3 inches)	45%	extreme
June Weather	28°C (82°F)	5 mm (0.2 inches)	31%	extreme
July Weather	29°C (85°F)	70 mm (2.8 inches)	27%	extreme
August Weather	29°C (84°F)	34 mm (1.3 inches)	30%	extreme
September Weather	26°C (79°F)	27 mm (1.0 inches)	48%	very high
October Weather	19°C (66°F)	23 mm (0.9 inches)	59%	very high
November Weather	14°C (57°F)	28 mm (1.1 inches)	70%	high
December Weather	9°C (48°F)	31 mm (1.2 inches)	77%	moderate