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October Weather in Mercer, United States

Last updated: June 24, 2025

In October, the average temperature in Mercer, United States hovers around 9°C (49°F). Expect a chilly minimum of -4°C (24°F), with a pleasant maximum reaching 25°C (78°F). Be prepared for some rain, as 129 mm (5.1 in) of precipitation is expected over 10 days, accompanied by an average humidity of 85%.

October Temperature in Mercer

In October in Mercer, the average temperature is 9°C (49°F). Maximums can reach 25°C (78°F), and minimums can drop as low as -4°C (24°F). Be prepared for a range of temperatures during your travels, and pack accordingly!

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 9°C (49°F), with highs reaching up to 25°C (78°F) and lows dropping to around -4°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec192129415464696860493424
Data source: Temperature data for Mercer generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

October Precipitation in Mercer

In Mercer in October, the precipitation amount is 129 mm (5.1 in) over a span of 10 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 129 mm (5.1 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec85847212787831218269129112116
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Mercer

In Mercer in October humidity is 85%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that seeps into your bones, making every step outside a challenge as the moisture in the air weighs heavily and lingers, transforming even simple outings into a quest for comfort.

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 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%85%84%78%72%75%74%77%85%86%85%
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.
JanFebMarAprMayJunJulAugSepOctNovDec2458910987532
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.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (19°F)85 mm (3.3 inches)91%low
February Weather-6°C (22°F)84 mm (3.3 inches)89%moderate
March Weather-2°C (29°F)72 mm (2.8 inches)85%moderate
April Weather5°C (42°F)127 mm (5.0 inches)84%very high
May Weather12°C (54°F)87 mm (3.4 inches)78%very high
June Weather18°C (64°F)83 mm (3.3 inches)72%very high
July Weather20°C (69°F)120 mm (4.7 inches)75%very high
August Weather20°C (68°F)82 mm (3.2 inches)74%very high
September Weather16°C (61°F)69 mm (2.7 inches)77%high
October Weather9°C (49°F)129 mm (5.1 inches)85%moderate
November Weather1°C (35°F)112 mm (4.4 inches)86%moderate
December Weather-5°C (24°F)116 mm (4.6 inches)85%low

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