September Weather in Deltana, United States

Last updated: June 24, 2025

In September, the average temperature in Deltana, United States hovers around 5°C (41°F), with extremes ranging from a chilling -18°C (0°F) to a mild 18°C (64°F). Expect a total precipitation of 62 mm (2.4 in) over approximately 14 days, contributing to an average humidity level of 94%, making the atmosphere quite damp and cool.

September Temperature in Deltana

In September in Deltana, the average temperature is 5°C (41°F). Maximum temperatures can reach 18°C (64°F), while minimums can drop to as low as -18°C (0°F). Pack accordingly to enjoy your travel, considering both warm days and chilly nights.

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

The chart illustrates September temperature patterns in Deltana, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Deltana, September typically has an average temperature of 5°C (41°F), with highs reaching up to 18°C (64°F) and lows dropping to around -18°C (0°F).

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

September Precipitation in Deltana

In Deltana in September, the precipitation amount is 62 mm (2.4 in) over a span of 14 days.

September Precipitation Trends in Deltana

The chart displays monthly precipitation patterns in Deltana, 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 Deltana, September typically receives around 62 mm (2.4 inches) of precipitation spread over approximately 14 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 Deltana

In Deltana in September, humidity is 94%. With an average temperature of 5°C (41°F), this humidity feels like a chilling dampness that seeps into your bones, making outdoor activities uncomfortable and travel challenging as the heavy air clings to you, leaving little room for warmth or comfort.

September Average Humidity in Deltana

This chart illustrates the average monthly humidity levels in Deltana, 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 Deltana is approximately 94%, 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 Deltana

In Deltana in September, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Deltana for better planning.

Maximum UV Index Levels in Deltana for September

The chart shows the monthly maximum UV Index (UVI) for Deltana 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 Deltana typically reaches 4, which falls under the moderate exposure category.

Data source: Deltana 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 Deltana Compares to Other Months

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

This table compares monthly weather conditions in Deltana, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-18°C (0°F)	20 mm (0.8 inches)	95%	low
February Weather	-17°C (3°F)	24 mm (0.9 inches)	93%	low
March Weather	-12°C (10°F)	27 mm (1.1 inches)	93%	moderate
April Weather	-3°C (27°F)	29 mm (1.1 inches)	91%	moderate
May Weather	6°C (42°F)	64 mm (2.5 inches)	87%	high
June Weather	11°C (53°F)	105 mm (4.1 inches)	86%	high
July Weather	13°C (56°F)	85 mm (3.4 inches)	93%	high
August Weather	10°C (51°F)	125 mm (4.9 inches)	94%	high
September Weather	5°C (41°F)	62 mm (2.4 inches)	94%	moderate
October Weather	-4°C (26°F)	61 mm (2.4 inches)	97%	low
November Weather	-14°C (7°F)	42 mm (1.7 inches)	99%	low
December Weather	-14°C (7°F)	42 mm (1.6 inches)	96%	low