Climate and monthly weather forecast
Waterloo, Canada

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The climate of Waterloo

Waterloo, sitting within the province of Ontario, portrays a Humid continental climate, commonly classified as Dfb under the Köppen climate classification. Throughout the year, weather patterns demonstrate substantial seasonal variations, with temperatures ranging from a low of -9.2°C in February to a high of 24.8°C in July.

Analyzing the monthly humidity data reveals consistent values from 75% to 89%, highlighting a generally humid environment. Rainfall shows a somewhat even distribution over the year, with more than 37mm each month, having the highest volume in October at 71mm. Snowfall, on the other hand, predominantly focuses within the colder months from November through March, hitting its peak in February at 164mm.

Weather patterns also indicate an increasing daylight duration from 9 hours in January to a high of 15.4 hours in June. In contrast, sunshine hours grow from 2.5 hours in January to a maximum of 9.9 hours in July. Notably, the relative cloud coverage dips during the summer months, moving from a high of 75% in January to 34% in July and August.

The best time to visit Waterloo

Visitors keen on exploring Waterloo under the sun should consider visiting between May and August when sunshine hours range from 8.7 to 9.9. This period also sees the warmest temperature, with average highs ranging from 18°C to 24°C, offering a comfortable outdoor condition.

Furthermore, the month of August provides the least rainy days in comparison to the rest of the year, averaging only 14.3 days of rainfall. Coupled with the least snowfall, it provides a conducive environment for various outdoor activities.

The worst time to visit Waterloo

The period from December to March might be the least appealing to visitors given the harsh weather conditions. In this span, average low temperatures can go down to -9.3°C in January and -9.2°C in February and coupled with substantial snowfall between 108mm and 164mm.

Moreover, these colder months experience fewer daylight hours, where it reaches the lowest at 9 hours in December and January. Even the number of days with sunshine sinks to a yearly minimum of 6.7 days in February, further deeming this period less suitable for a visit.

Spring weather in Waterloo

The arrival of spring constitutes a vital change in Waterloo's weather, with a significant increase in temperature from a low of -4.1°C in March to a high of 18°C in May. Rainfall during this time ranges from 53mm to 69mm per month, while snowfall reduces dramatically from 108mm in March to 3mm in May.

Summer weather in Waterloo

Summer in Waterloo comes with the warmest temperatures, reaching between 21.8°C to 24.8°C from June to August. This period also holds the maximum daylight and sunshine hours, making it the most sunlit period of the year. Rainfall scales down from 52mm in June to 37mm in September, providing dry conditions for tourists.

Autumn weather in Waterloo

Autumn in Waterloo exhibits a gradual temperature decline from an average high of 20.8°C in September to 5.8°C in November. Rainfall exhibits an upward trend, reaching its yearly peak in October with 71mm. The daylight duration shrinks from 12.5 hours to 9.7 hours, while sunshine hours decrease from 8.3 hours in September to 4.1 hours in November.

Winter weather in Waterloo

Winter in Waterloo is characterized by its cold weather, with average high temperatures staying below freezing point from -3.7°C in December to -0.2°C in February. The temperature can drop as low as -9.3°C in January, making it the coldest month of the year. Snowfall reaches its zenith from December to February with an average snowfall between 122mm and 164mm. The number of sunshine days is also at its lowest during this period.

Weather in January

Snow is a definitive characteristic of Waterloo's weather in January. With an average snowfall measurement of 137mm that occurs over 18.3 days, it is the month with the third-highest snowfall. The typically brisk winds, averaging at a speed of 18.1km/h, accentuate the frigid feel. Weather in January »

Weather in February

Although February in Waterloo maintains the wintery theme of January, it experiences more snowfall by a total of 164mm. This snowfall occurs over fewer days compared to January. The decrease in humidity, combined with the increased snowfall, often results in a "powdery" type of snow popular with winter sport enthusiasts. Weather in February »

Weather in March

The advent of March brings about a notable shift in Waterloo’s weather compared to February. The city experiences fewer snowfall of 108mm, occurring over 10.8 days. An increase in daylight hours marks the beginning of a transition from winter to spring. Weather in March »

Weather in April

April in Waterloo presents clearer signs of spring. A significant drop in snowfall occurs with only 37mm accumulated over 4.6 days. This noticeable reduction in snowfall indicates the end of the city's snowy period. Consequently, rainfall takes precedence as the main form of precipitation for the rest of the year. Weather in April »

Weather in May

As spring deepens in May, Waterloo city witnesses further warming. Rainfall becomes more prevalent, suggesting a shift to a warmer, more humid climate. May serves as a transitional phase between the moderate climate of spring to the warmer summer months. Weather in May »

Weather in June

June marks the start of summer in Waterloo. Humidity increases, demonstrated by an 80% average relative humidity level. This humidity, combined with increased temperatures, makes the air feel warmer. Traditionally, this month kicks off the peak tourism season in the city. Weather in June »

Weather in July

July, considered the hottest month in Waterloo, experiences the highest average maximum temperature of 24.8°C. The escalation of temperatures combines with a relatively high humidity level to make this month distinctly warm. Amidst these warm conditions, the city basks in the most prolonged daylight hours of the year. Weather in July »

Weather in August

August in Waterloo sustains July's warmth, with temperatures marginally dipping from the July peak. By this time, the summer's heat has thoroughly seeped into the city, maintaining a warm atmosphere. Visitors and locals continue to enjoy a vibrant outdoor experience. Weather in August »

Weather in September

September ushers in autumn in Waterloo, bringing with it a reduction in temperature to an average high of 20.8°C. This climatic change is matched by alterations in the city's flora, with greenery slowly giving way to shades of yellow, orange, and red. Weather in September »

Weather in October

October in Waterloo can be described as a truly autumn month. The transition from the warmth of September to the chillier winter months becomes more apparent as the temperatures continue to drop. A steady reduction in sunlight hours signals shorter days ahead. Weather in October »

Weather in November

November in Waterloo typically experiences among the first snowfalls of the season, with an 84mm accumulation on average. The overall weather is characterized by a blend of lingering autumn remnants mixed with the emerging winter chill. Weather in November »

Weather in December

December signals the onset of winter in Waterloo, with a measured snowfall of 122mm on average. The drop in temperatures, combined with increased snowfall, announces the full arrival of the winter season. The city is adorned in a stunning winter spectacle of snow, making December a visually appealing month despite the cold. Weather in December »
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FAQ

What part of the year is the coldest in Waterloo?

January is the month when Waterloo experiences its coldest temperatures, averaging a high of -3.7°C and a low of -9.3°C.

What are the most humid months in Waterloo?

The months with the highest humidity in Waterloo, Canada, are January and February, with an average relative humidity of 89%.

How many days does it rain in Waterloo?

Throughout the year, in Waterloo, there are 157.6 rainfall days, and 681mm of precipitation is accumulated.

When does it snow in Waterloo?

January through May, October through December are months with snowfall in Waterloo.

How much does it snow in Waterloo?

Throughout the year, there are 80.1 snowfall days, and 666mm of snow is accumulated.

What is the month with the least sunshine in Waterloo?

January has the least sunshine of the year, with an average of 2.5h of sunshine.

When is the lowest UV index in Waterloo?

The months with the lowest UV index in Waterloo, Canada, are January, February and December, with an average maximum UV index of 1.

When does it snow the most in Waterloo?

February is the month with the most snowfall. Snow falls for 17.6 days and accumulates 164mm of snow.

When is Daylight Saving Time (DST) in Waterloo?

On Sunday, 12. March 2023, at 2:00 am, Daylight Saving Time starts in Waterloo, Canada, and the time zone changes from EST to EDT. Daylight Saving Time ends on Sunday, 05. November 2023, at 2:00 am, and the time zone reverts from EDT to EST.

What is the least humid month in Waterloo?

April is the least humid month, with an average relative humidity of 75%.

What are the months with the highest UV index in Waterloo?

May through August, with an average maximum UV index of 5, are months with the highest UV index in Waterloo, Canada.

When it does not snow in Waterloo?

In Waterloo, Canada, snow does not fall in June through September.

When are the longest days in Waterloo?

June has the longest days of the year, with an average of 15h and 24min of daylight.

What is the hottest time of year in Waterloo?

July, characterized by an average high temperature of 24.8°C and a low temperature of 15°C, is generally the warmest month in Waterloo.

What month has the most sunshine in Waterloo?

July has the most sunshine of the year, with an average of 9.9h of sunshine.

What is the driest month in Waterloo?

September is the month with the least rainfall in Waterloo, Canada. Rain falls for 13.2 days and accumulates 37mm of precipitation.

What is the rainiest month in Waterloo?

October is the month with the most rainfall. Rain falls for 17 days and accumulates 71mm of precipitation.

What is the month with the shortest days in Waterloo?

With an average of 9h and 0min of daylight, December has the shortest days of the year in Waterloo.

Average pressure
Waterloo, Canada

Average pressure - Waterloo, Canada

The month with the highest atmospheric pressure is March (1018.5mbar).
The month with the lowest atmospheric pressure is June (1013.3mbar).

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Average wind speed
Waterloo, Canada

Average wind speed - Waterloo, Canada

The windiest month (with the highest average wind speed) is January (18.1km/h).
The calmest month (with the lowest average wind speed) is July (11km/h).

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Average humidity
Waterloo, Canada

Average humidity - Waterloo, Canada

The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is April (75%).

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Average rainfall
Waterloo, Canada

Average rainfall - Waterloo, Canada

The wettest month (with the highest rainfall) is October (71mm).
The driest month (with the least rainfall) is September (37mm).

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Average rainfall days
Waterloo, Canada

Average rainfall days - Waterloo, Canada

The month with the highest number of rainy days is July (19 days).
The month with the least rainy days is February (6.4 days).

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Average snowfall
Waterloo, Canada

Average snowfall - Waterloo, Canada

The month with the highest snowfall is February (164mm).
The months with the least snowfall are June, July, August and September (0mm).

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Average snowfall days
Waterloo, Canada

Average snowfall days - Waterloo, Canada

The month with the highest number of snowfall days is January (18.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Waterloo, Canada

Average daylight / Average sunshine - Waterloo, Canada

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).

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Average sunshine days
Waterloo, Canada

Average sunshine days - Waterloo, Canada

The month with the most sunshine days is September (13.9 days).
The month with the least sunshine days is February (6.7 days).

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Average UV index
Waterloo, Canada

Average UV index - Waterloo, Canada

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).

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Average visibility
Waterloo, Canada

Average visibility - Waterloo, Canada

The months with the highest visibility are April, May, June, July and October (9km).
The month with the lowest visibility is January (7km).

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Waterloo, Canada

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