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October Weather in Harriston, United States

Last updated: June 24, 2025

In Harriston, United States, the average temperature in October hovers around 15°C (60°F). However, be prepared for a range of conditions, as temperatures can dip to a chilly -2°C (28°F) or soar to a warm 34°C (93°F). Expect some rain as well, with an average precipitation of 106 mm (4.2 in) over 9 days, and a high humidity level of 80%.

October Temperature in Harriston

In October in Harriston, the average temperature is 15°C (60°F), with maximums reaching up to 34°C (93°F) and minimums dropping as low as -2°C (28°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates October temperature patterns in Harriston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Harriston, October typically has an average temperature of 15°C (60°F), with highs reaching up to 34°C (93°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec354045556472777469594439
Data source: Temperature data for Harriston 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 Harriston

In Harriston in October, the total precipitation amount is 106 mm (4.2 in), spread over the course of 9 days.

October Precipitation Trends in Harriston

The chart displays monthly precipitation patterns in Harriston, 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 Harriston, October typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec60876710811089591081021067684
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Harriston

In Harriston in October humidity is 80%. With an average temperature of 15°C (60°F), this humidity feels like a warm, sticky embrace that can make even the simplest stroll feel like a workout, leaving travelers yearning for a refreshing breeze or shade to escape the weight of the air.

October Average Humidity in Harriston

This chart illustrates the average monthly humidity levels in Harriston, 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 Harriston is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%84%78%79%70%59%68%80%87%85%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Harriston

In Harriston in October, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Harriston.

Maximum UV Index Levels in Harriston for October

The chart shows the monthly maximum UV Index (UVI) for Harriston 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 Harriston typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579111010109753
Data source: Harriston 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 Harriston Compares to Other Months

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

This table compares monthly weather conditions in Harriston, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)60 mm (2.4 inches)86%moderate
February Weather5°C (40°F)87 mm (3.4 inches)86%moderate
March Weather7°C (46°F)67 mm (2.6 inches)86%high
April Weather13°C (55°F)108 mm (4.2 inches)84%very high
May Weather18°C (65°F)110 mm (4.3 inches)78%extreme
June Weather22°C (72°F)89 mm (3.5 inches)79%very high
July Weather25°C (77°F)59 mm (2.3 inches)70%very high
August Weather24°C (75°F)108 mm (4.2 inches)59%very high
September Weather21°C (69°F)102 mm (4.0 inches)68%very high
October Weather15°C (60°F)106 mm (4.2 inches)80%high
November Weather7°C (44°F)76 mm (3.0 inches)86%moderate
December Weather4°C (39°F)84 mm (3.3 inches)85%moderate

Compare Harriston's Climate with Cities Worldwide