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October Weather in Waterloo, United States

Last updated: June 24, 2025

In October, the average temperature in Waterloo, United States hovers around 11°C (53°F). Expect a range where minimums can dip to -7°C (20°F) while the maximums soar up to 32°C (91°F). With an average humidity of 75%, you can anticipate a bit of mugginess. During this month, expect about 115 mm (4.5 in) of precipitation spread across 9 days.

October Temperature in Waterloo

In October in Waterloo, the average temperature is 11°C (53°F). Maximums can reach 32°C (91°F) and minimums can be as low as -7°C (20°F). It's essential to pack a variety of clothing to accommodate the wide temperature range during your travels.

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

The chart illustrates October temperature patterns in Waterloo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Waterloo, October typically has an average temperature of 11°C (53°F), with highs reaching up to 32°C (91°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec252541506376787570534031
Data source: Temperature data for Waterloo 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 Waterloo

In Waterloo in October, the precipitation amount is 115 mm (4.5 in) over the course of 9 days, indicating a relatively wet period for the region.

October Precipitation Trends in Waterloo

The chart displays monthly precipitation patterns in Waterloo, 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 Waterloo, October typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec3330975414612674101831153140
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Waterloo

In Waterloo in October humidity is 75%. With an average temperature of 11°C (53°F), this humidity feels like a cool, damp embrace that can make exploring the area feel more challenging, as you constantly contend with the moisture in the air while trying to enjoy your travels.

October Average Humidity in Waterloo

This chart illustrates the average monthly humidity levels in Waterloo, 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 Waterloo is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%80%73%75%78%82%83%81%75%75%82%83%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Waterloo

In Waterloo in October, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Waterloo, you can refer to this Hourly UV Index in Waterloo.

Maximum UV Index Levels in Waterloo for October

The chart shows the monthly maximum UV Index (UVI) for Waterloo 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 Waterloo typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Waterloo 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 Waterloo Compares to Other Months

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

This table compares monthly weather conditions in Waterloo, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)32 mm (1.3 inches)76%moderate
February Weather-4°C (26°F)30 mm (1.2 inches)80%moderate
March Weather5°C (41°F)97 mm (3.8 inches)73%high
April Weather10°C (51°F)54 mm (2.1 inches)74%very high
May Weather17°C (63°F)146 mm (5.8 inches)78%very high
June Weather24°C (76°F)126 mm (5.0 inches)82%very high
July Weather26°C (78°F)74 mm (2.9 inches)83%very high
August Weather24°C (75°F)100 mm (4.0 inches)80%very high
September Weather21°C (70°F)83 mm (3.3 inches)75%very high
October Weather11°C (53°F)115 mm (4.5 inches)75%high
November Weather5°C (40°F)31 mm (1.2 inches)82%moderate
December Weather0°C (32°F)40 mm (1.6 inches)83%low

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