September Weather in Fort Sumner, United States

Last updated: June 24, 2025

In Fort Sumner, United States, the average temperature in September hovers around a pleasant 22°C (73°F). However, you may experience a range from a chilly 3°C (38°F) to a toasty 37°C (99°F). Throughout the month, expect about 31 mm (1.2 in) of precipitation spread over 4 days, with an average humidity level of 76%. Whether you're seeking sun or shade, this month offers a diverse climate experience!

September Temperature in Fort Sumner

In September in Fort Sumner, the average temperature is 22°C (73°F). Maximums can reach 37°C (99°F) and minimums can drop as low as 3°C (38°F). This makes it a great time for travelers to experience a mix of warm days and cooler evenings, perfect for enjoying outdoor activities and sightseeing.

September Weather in Fort Sumner: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Fort Sumner, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fort Sumner, September typically has an average temperature of 22°C (73°F), with highs reaching up to 37°C (99°F) and lows dropping to around 3°C (38°F).

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

September Precipitation in Fort Sumner

In Fort Sumner in September, the total precipitation amount is 31 mm (1.2 in) over a span of 4 days.

September Precipitation Trends in Fort Sumner

The chart displays monthly precipitation patterns in Fort Sumner, 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 Fort Sumner, September typically receives around 31 mm (1.2 inches) of precipitation spread over approximately 4 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 Fort Sumner

In Fort Sumner in September, humidity is 76%. With an average temperature of 22°C (73°F), this humidity feels like a warm embrace that envelops you, making travel both refreshing and slightly steamy, as the air clings warmly to your skin.

September Average Humidity in Fort Sumner

This chart illustrates the average monthly humidity levels in Fort Sumner, 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 Fort Sumner is approximately 76%, 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 Fort Sumner

In Fort Sumner 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 Fort Sumner.

Maximum UV Index Levels in Fort Sumner for September

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

Data source: Fort Sumner 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 Fort Sumner Compares to Other Months

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

This table compares monthly weather conditions in Fort Sumner, 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 (41°F)	11 mm (0.4 inches)	74%	moderate
February Weather	7°C (44°F)	10 mm (0.4 inches)	75%	high
March Weather	12°C (53°F)	30 mm (1.2 inches)	61%	very high
April Weather	16°C (60°F)	17 mm (0.7 inches)	61%	extreme
May Weather	21°C (70°F)	27 mm (1.1 inches)	69%	extreme
June Weather	26°C (79°F)	35 mm (1.4 inches)	74%	extreme
July Weather	27°C (81°F)	22 mm (0.9 inches)	75%	extreme
August Weather	26°C (79°F)	43 mm (1.7 inches)	78%	extreme
September Weather	22°C (73°F)	31 mm (1.2 inches)	76%	very high
October Weather	15°C (59°F)	52 mm (2.0 inches)	76%	very high
November Weather	10°C (50°F)	13 mm (0.5 inches)	80%	high
December Weather	6°C (43°F)	8 mm (0.3 inches)	77%	moderate