October Weather in Mercer, United States

Last updated: June 24, 2025

In Mercer, United States, the average temperature in October is a cool 7°C (44°F), with extremes ranging from a chilly -9°C (16°F) to a warm 26°C (79°F). Expect about 118 mm (4.7 in) of precipitation spread over 15 days, contributing to an average humidity of 81%. Be prepared for a blend of crisp days and potential showers!

October Temperature in Mercer

In October in Mercer, the average temperature is 7°C (44°F). Maximums can reach 26°C (79°F) and minimums can be as low as -9°C (16°F). This variability in temperature makes it essential for travelers to pack layers for their visit.

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

The chart illustrates October temperature patterns in Mercer, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mercer, October typically has an average temperature of 7°C (44°F), with highs reaching up to 26°C (79°F) and lows dropping to around -9°C (16°F).

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

October Precipitation in Mercer

In Mercer in October, the total precipitation amount is 118 mm (4.7 in) spread over 15 days.

October Precipitation Trends in Mercer

The chart displays monthly precipitation patterns in Mercer, 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 Mercer, October typically receives around 118 mm (4.7 inches) of precipitation spread over approximately 15 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 Mercer

In Mercer in October humidity is 81%. With an average temperature of 7°C (44°F), this humidity feels like a damp chill that seeps into your bones, making it essential to dress warmly while exploring.

October Average Humidity in Mercer

This chart illustrates the average monthly humidity levels in Mercer, 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 Mercer is approximately 81%, 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 Mercer

In Mercer in October, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Mercer.

Maximum UV Index Levels in Mercer for October

The chart shows the monthly maximum UV Index (UVI) for Mercer 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 Mercer typically reaches 5, which falls under the moderate exposure category.

Data source: Mercer 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 Mercer Compares to Other Months

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

This table compares monthly weather conditions in Mercer, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-10°C (14°F)	36 mm (1.4 inches)	93%	low
February Weather	-10°C (14°F)	51 mm (2.0 inches)	93%	moderate
March Weather	-3°C (27°F)	53 mm (2.1 inches)	89%	moderate
April Weather	3°C (37°F)	92 mm (3.6 inches)	85%	high
May Weather	12°C (54°F)	100 mm (3.9 inches)	76%	very high
June Weather	18°C (65°F)	121 mm (4.8 inches)	71%	very high
July Weather	20°C (69°F)	110 mm (4.3 inches)	70%	very high
August Weather	18°C (65°F)	126 mm (5.0 inches)	71%	very high
September Weather	14°C (58°F)	98 mm (3.9 inches)	73%	high
October Weather	7°C (44°F)	118 mm (4.7 inches)	81%	moderate
November Weather	-2°C (29°F)	58 mm (2.3 inches)	87%	moderate
December Weather	-7°C (20°F)	70 mm (2.8 inches)	91%	low