The best times to visit St Catharines for ideal weather are
May 21st to October 14th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
St Catharines Travel Guide
Other St Catharines Travel Info
Weather in St Catharines
Average temperatures in St Catharines vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a fair chance of precipitation about half of the year. The area is less temperate than some — in the 38th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit St Catharines, the hottest months are July, August, and then September. See average monthly temperatures below. The warmest time of year is generally early August where highs are regularly around 81.7°F (27.6°C) with temperatures rarely dropping below 66.5°F (19.2°C) at night.
St Catharines Temperatures (Fahrenheit)
St Catharines Temperatures (Celsius)
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
St Catharines Perceived Temperature (F)
St Catharines Perceived Temperature (C)
Average St Catharines Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in St Catharines are March, February, and then November. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid November. For example, on the week of November 12th there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in early to mid August with an average of 2 days of significant precipitation the week of August 6th.
When can you find snow in St Catharines? Weather stations report a good amount of seasonal snow likely to be deepest around February, especially close to early February. The best time to ski (if at all) in St Catharines is often around around February 12th when fresh powder is deepest. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
Chance of Precipitation
The graph below shows the % chance of rainy and snowy days in St Catharines.
Snow on the Ground
The graph below shows the average snow on the ground in St Catharines (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
St Catharines has some humid months, and above average humidity throughout the year. The least humid month is March (63.2% relative humidity), and the most humid month is December (69.1%).
Wind in St Catharines is usually moderate. The windiest month is February, followed by January and December. February’s average wind speed of around 11.2 knots (12.9 MPH or 20.8 KPH) is considered “a moderate breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in mid February where average top sustained speeds reach 20.6 knots, which is considered a fresh breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in St Catharines.
The graph below shows wind speed (max and average) in knots.
Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.
|Month||Avg. Wind||Avg. Wind Feel||Sustained High Wind||High Wind Feel|
|Jan||10.9||Gentle breeze||19.4||Strong breeze|
|Feb||11.2||Significant breeze||19.7||Strong breeze|
|Mar||10.2||Gentle breeze||18||Strong breeze|
|Apr||9.5||Gentle breeze||17.6||Strong breeze|
|May||6.6||Light breeze||13.5||Strong breeze|
|Jun||6.3||Light breeze||13.3||Significant breeze|
|Jul||5.6||Light breeze||12.1||Strong breeze|
|Aug||6.3||Light breeze||13.4||Significant breeze|
|Sep||7.3||Gentle breeze||14.7||Strong breeze|
|Oct||9.1||Gentle breeze||17.1||Strong breeze|
|Nov||10||Gentle breeze||17.6||Strong breeze|
|Dec||10.5||Gentle breeze||18.4||Strong breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to St Catharines?
Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for Canada; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Oct 07, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in St Catharines, ON, Canada is July, followed by August and June. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit St Catharines in November. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
Overall St Catharines Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderately cold. Highs range from 72.8°F (22.7°C) and 34°F (1.1°C) with far warmer temperatures in the later months. Rain is somewhat common with 5 to 7 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.
Summer (June through August)
The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the most precipitation with 6 to 8 days of precipitation per month. June – August is the busiest season for tourism in St Catharines, so lodging and other accommodations may cost more than usual.
Fall (September through November)
Fall daily highs range from 77.7°F (25.4°C) and 45.5°F (7.5°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 5 to 7 days per month. Tourism is fairly slow during these months due to the weather, so hotels may be lower priced.
Winter (December through February)
Weather is far too cold this time of year in St Catharines to be enjoyable for warm weather travelers. The average high during this season is between 41.8°F (5.4°C) and 30.1°F (-1.1°C). On average, it rains or snows a fair amount: 4 to 5 times per month. These times of year are the slowest with tourists.