October Weather in Waterloo Canada

Daily high temperatures decrease by 12°F, from 59°F to 47°F, rarely falling below 36°F or exceeding 70°F.

Daily low temperatures decrease by 10°F, from 43°F to 33°F, rarely falling below 23°F or exceeding 53°F.

For reference, on July 19, the hottest day of the year, temperatures in Waterloo typically range from 58°F to 75°F, while on January 29, the coldest day of the year, they range from 5°F to 23°F.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on October. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Utashinai, Japan (5,947 miles away) is the far-away foreign place with temperatures most similar to Waterloo (view comparison).

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The month of October in Waterloo experiences increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 46% to 57%.

The clearest day of the month is October 1, with clear, mostly clear, or partly cloudy conditions 54% of the time.

For reference, on January 5, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 72%, while on August 28, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 62%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Waterloo, the chance of a wet day over the course of October is essentially constant, remaining around 35% throughout.

For reference, the year's highest daily chance of a wet day is 45% on July 7, and its lowest chance is 22% on February 4.

Over the course of October in Waterloo, the chance of a day with only rain decreases from 34% to 28%, the chance of a day with mixed snow and rain increases from 0% to 4%, and the chance of a day with only snow remains an essentially constant 1% throughout.

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during October in Waterloo is decreasing, starting the month at 3.4 inches, when it rarely exceeds 5.7 inches or falls below 1.6 inches, and ending the month at 2.8 inches, when it rarely exceeds 4.8 inches or falls below 1.3 inches.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day snowfall during October in Waterloo is increasing, starting the month at 0.1 inches, when it rarely exceeds 0.3 inches or falls below -0.0 inches, and ending the month at 2.4 inches, when it rarely exceeds 5.7 inches.

Over the course of October in Waterloo, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 31 minutes, implying an average daily decrease of 3 minutes, 2 seconds, and weekly decrease of 21 minutes, 14 seconds.

The shortest day of the month is October 31, with 10 hours, 9 minutes of daylight and the longest day is October 1, with 11 hours, 40 minutes of daylight.

The earliest sunrise of the month in Waterloo is 6:48 AM on October 1 and the latest sunrise is 40 minutes later at 7:28 AM on October 31.

The latest sunset is 6:29 PM on October 1 and the earliest sunset is 51 minutes earlier at 5:38 PM on October 31.

Daylight saving time is observed in Waterloo during 2024, but it neither starts nor ends during October, so the entire month is in standard time.

For reference, on June 20, the longest day of the year, the Sun rises at 5:01 AM and sets 15 hours, 40 minutes later, at 8:41 PM, while on December 21, the shortest day of the year, it rises at 7:26 AM and sets 8 hours, 43 minutes later, at 4:10 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for October 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Waterloo is essentially constant during October, remaining within 1% of 1% throughout.

For reference, on July 22, the muggiest day of the year, there are muggy conditions 18% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Waterloo is gradually increasing during October, increasing from 5.0 miles per hour to 5.6 miles per hour over the course of the month.

For reference, on February 6, the windiest day of the year, the daily average wind speed is 8.0 miles per hour, while on August 7, the calmest day of the year, the daily average wind speed is 4.0 miles per hour.

The wind direction in Waterloo during October is predominantly out of the south from October 1 to October 13 and the west from October 13 to October 31.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Waterloo typically lasts for 4.9 months (150 days), from around May 7 to around October 4, rarely starting before April 21 or after May 26, and rarely ending before September 16 or after October 22.

During October in Waterloo, the chance that a given day is within the growing season is very rapidly decreasing falling from 59% to 2% over the course of the month.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Waterloo are gradually increasing during October, increasing by 67°F, from 1,789°F to 1,856°F, over the course of the month.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Waterloo is decreasing during October, falling by 1.4 kWh, from 3.5 kWh to 2.1 kWh, over the course of the month.

For the purposes of this report, the geographical coordinates of Waterloo are 45.350 deg latitude, -72.516 deg longitude, and 676 ft elevation.

The topography within 2 miles of Waterloo contains only modest variations in elevation, with a maximum elevation change of 312 feet and an average elevation above sea level of 769 feet. Within 10 miles contains only modest variations in elevation (1,873 feet). Within 50 miles contains very significant variations in elevation (3,753 feet).

The area within 2 miles of Waterloo is covered by trees (76%), within 10 miles by trees (78%) and cropland (11%), and within 50 miles by trees (54%) and cropland (34%).