October Weather in Decatur, United States

Last updated: June 24, 2025

In October, the average temperature in Decatur, United States hovers around 19°C (67°F), with a range that can dip to a brisk 1°C (34°F) and peak at a warm 35°C (95°F). Expect approximately 121 mm (4.8 in) of precipitation spread over 8 days, accompanied by an average humidity level of 70%.

October Temperature in Decatur

In October, in Decatur, the average temperature is 19°C (67°F). The maximum can reach 35°C (95°F), and the minimum can be as low as 1°C (34°F). This wide temperature range makes Decatur an ideal destination for travelers seeking both warm days and cool evenings.

October Weather in Decatur: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Decatur, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Decatur, October typically has an average temperature of 19°C (67°F), with highs reaching up to 35°C (95°F) and lows dropping to around 1°C (34°F).

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

October Precipitation in Decatur

In Decatur in October, the precipitation amount is 121 mm (4.8 in) over the course of 8 days.

October Precipitation Trends in Decatur

The chart displays monthly precipitation patterns in Decatur, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Decatur, October typically receives around 121 mm (4.8 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

October Humidity in Decatur

In Decatur in October humidity is 70%. With an average temperature of 19°C (67°F), this humidity feels like a warm blanket wrapping around you, making traveling somewhat uncomfortable and sticky, as the air feels dense and every movement requires a bit more effort.

October Average Humidity in Decatur

This chart illustrates the average monthly humidity levels in Decatur, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Decatur is approximately 70%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Decatur

In Decatur in October, 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 Decatur.

Maximum UV Index Levels in Decatur for October

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

Data source: Decatur October 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 October Weather in Decatur Compares to Other Months

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

This table compares monthly weather conditions in Decatur, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (45°F)	51 mm (2.0 inches)	77%	moderate
February Weather	9°C (48°F)	78 mm (3.1 inches)	76%	high
March Weather	15°C (59°F)	85 mm (3.3 inches)	74%	very high
April Weather	18°C (64°F)	91 mm (3.6 inches)	75%	very high
May Weather	23°C (74°F)	135 mm (5.3 inches)	80%	extreme
June Weather	27°C (81°F)	86 mm (3.4 inches)	80%	extreme
July Weather	29°C (85°F)	44 mm (1.7 inches)	75%	extreme
August Weather	29°C (84°F)	82 mm (3.2 inches)	67%	extreme
September Weather	26°C (78°F)	81 mm (3.2 inches)	64%	very high
October Weather	19°C (67°F)	121 mm (4.8 inches)	70%	very high
November Weather	13°C (55°F)	50 mm (2.0 inches)	82%	high
December Weather	10°C (50°F)	49 mm (1.9 inches)	85%	moderate