September Weather in Barnwell, United States

Last updated: June 24, 2025

In Barnwell, United States, the average temperature in September hovers at a comfortable 26°C (78°F). Prepare for a range of temperatures, with a minimum of 11°C (52°F) and a peak reaching up to 38°C (100°F). Expect 88 mm (3.4 in) of precipitation over about 8 days, contributing to an average humidity of 83%. Stay hydrated and enjoy the warmth!

September Temperature in Barnwell

In September in Barnwell, the average temperature is 26°C (78°F). Maximums can reach 38°C (100°F), while minimums can drop to as low as 11°C (52°F). This range makes it an ideal destination for travelers seeking warm weather during the day and cooler evenings.

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

The chart illustrates September temperature patterns in Barnwell, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Barnwell, September typically has an average temperature of 26°C (78°F), with highs reaching up to 38°C (100°F) and lows dropping to around 11°C (52°F).

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

September Precipitation in Barnwell

In Barnwell in September, the total precipitation amount reaches 88 mm (3.4 in) over the course of 8 days.

September Precipitation Trends in Barnwell

The chart displays monthly precipitation patterns in Barnwell, 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 Barnwell, September typically receives around 88 mm (3.4 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 Barnwell

In Barnwell in September, humidity is 83%. With an average temperature of 26°C (78°F), this humidity feels like a heavy blanket wrapping around you, making travel a sticky affair as sweat lingers on your skin and every step requires extra effort.

September Average Humidity in Barnwell

This chart illustrates the average monthly humidity levels in Barnwell, 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 Barnwell is approximately 83%, 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 Barnwell

In Barnwell 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 Barnwell.

Maximum UV Index Levels in Barnwell for September

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

Data source: Barnwell 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 Barnwell Compares to Other Months

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

This table compares monthly weather conditions in Barnwell, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (50°F)	85 mm (3.3 inches)	86%	moderate
February Weather	13°C (55°F)	106 mm (4.2 inches)	81%	high
March Weather	15°C (60°F)	76 mm (3.0 inches)	81%	very high
April Weather	19°C (66°F)	110 mm (4.3 inches)	79%	very high
May Weather	23°C (74°F)	99 mm (3.9 inches)	75%	extreme
June Weather	26°C (79°F)	126 mm (4.9 inches)	75%	extreme
July Weather	28°C (82°F)	143 mm (5.6 inches)	80%	extreme
August Weather	27°C (81°F)	137 mm (5.4 inches)	81%	extreme
September Weather	26°C (78°F)	88 mm (3.4 inches)	83%	very high
October Weather	21°C (70°F)	72 mm (2.8 inches)	78%	very high
November Weather	13°C (56°F)	61 mm (2.4 inches)	85%	high
December Weather	11°C (52°F)	128 mm (5.1 inches)	87%	moderate