WIARTON A

Overview
Located on the southern end of the Bruce Peninsula in Lake Huron, Wiarton, Ontario sits on the western shores of the Georgian Bay. Lake effects moderate the temperature, with normal summertime maximum temperatures below 25°C. Minimum temperatures during the winter are also moderated, with Haliburton, Ontario 6°C colder on average at similar latitude.
Precipitation is normally highest in the fall to early winter, with the February through April period the driest. Lake-effects lead to more than 400 cm of snowfall in the winter, more than 100 cm higher than Haliburton, Ontario. However, Wiarton receives around 25 cm less of total precipitation per year comparatively.

State/ Province ID: ON

Station ID: CA006119500

Directory Name: WIARTON_A__ON_006119500

Elevation: 222.00m

The resources presented here were developed in cooperation with the Office of the Michigan State Climatologist using data from the National Centers for Environmental Information. For more information regarding our data sources, quality control, and methodology, please see our Historical Climatologies: Quality Control reference guide.

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Recent Climate Summary, 1991-2020


Average Temperature	44.0°F6.7°C
Average Low Temperature	35.6°F2.0°C
Average High Temperature	52.3°11.3°C
Days/Year that exceed 90°F	0.4
Days/Year that fall below 32°F	145.5
Lowest Annual Average Temperature	41.7°F5.4°C
Highest Annual Average Temperature	47.2°F8.5°C
Average Annual Total Precipitation	41.3 in105.0 cm
Lowest Annual Precipitation Total	33.8 in85.8 cm
Highest Annual Precipitation Total	55.6 in141.3 cm
Days/Year that exceed 1.25" of Precipitation	2.6

Temperature

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Monthly Average Temperature
How Temperatures are Changing
- Changes in Average Temperature – Includes a summary table of the average annual and seasonal temperature changes, and time series graphs of how the annual low, average, and high temperatures compare to the long term average plotted for every year on record.
- Cold Temperatures – View time series plots of the number of days per year below 32°F and the number of heating degree days per year to see how cold days are changing.
- Hot Temperatures – View time series plots of the number of days per year above 90°F and the number of cooling degree days per year to see how hot days are changing.
- Growing Season Changes – View a time series of the annual number of days in the freeze-free period.

Monthly Average Temperature

Changes in Average Temperature, 1951-2014.


	°F°C
Annual average temperature	2.01.1
Winter average temperature	2.01.1
Spring average temperature	2.51.4
Summer average temperature	1.00.5
Fall average temperature	0.40.2

Annual High and Low Temperature Departure

Cold Temperatures

¹Heating Degree Days (HDDs) are indexed units, not actual days, that roughly describe the demand to heat a building. HDDs accumulate on days colder than 65°F when heating is required. Every degree below 65°F is added to the annual total for an annual HDD value, which is plotted in the figure.

Hot Temperatures

²Cooling Degree Days (CDDs) are indexed units, not actual days, that roughly describe the demand to cool a building. CDDs accumulate on days warmer than 65°F when cooling is required. Every degree above 65°F is added to the annual total for an annual CDD value, which is plotted in the figure.

Growing Season Changes

Precipitation