Frost Dates for Ridgetown, ON

Based on data from Erieau (Aut) weather station, 13 miles away

Elevation: 213 m

Frost Dates

Last Spring Frost (50%) A 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. April 13
First Fall Frost (50%) A 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. November 11

30% Probability

Only a 30% chance of frost remaining by this date. Use these dates for a safer planting window, especially for tender plants sensitive to cold.
Last Spring Frost April 18
First Fall Frost November 3

Hard Freeze (−2°C)

Last Spring Hard Freeze April 1
First Fall Hard Freeze November 23
42.44°N, 81.89°W © OpenStreetMap

Growing Season

212 Days April 13 to November 11

USDA Hardiness Zone

Hardiness zones indicate which perennial plants can survive winter in your area. For annual vegetables, frost dates and growing season length matter more than hardiness zone.
Zone 7a

Avg. annual minimum: −18 to −15°C

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Dfa Hot-Summer Continental

Hot summers and cold winters with year-round precipitation. Moderate growing season supports warm-season crops like tomatoes, peppers, and corn. Winter protection extends the harvest.

Köppen climate map

Temperature

Avg High Avg Temp Avg Low Light Frost (0°C) Hard Frost (−2°C)
Temperature table
Average monthly temperatures (°C)
Month Avg High Avg Temp Avg Low
January-1°-4°-6°
February0°-3°-6°
March3°0°-2°
April9°6°3°
May15°12°9°
June21°18°16°
July24°21°19°
August24°22°19°
September21°18°15°
October15°12°9°
November8°6°3°
December2°0°-3°

Precipitation

Precipitation table
Average monthly precipitation (millimeters)
MonthPrecipitation
January0
February0
March0
April0
May58
June81
July79
August48
September79
October0
November0
December0

Sunrise / Sunset

Daylight Eastern Time (ET) Longest: 15h 06m · Shortest: 8h 54m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Eastern Time (ET))
Month Sunrise Sunset Daylight
January7:60 AM5:14 PM9h 14m
February7:32 AM5:53 PM10h 21m
March7:48 AM7:27 PM11h 39m
April6:53 AM8:02 PM13h 09m
May6:12 AM8:36 PM14h 24m
June5:56 AM8:60 PM15h 04m
July6:09 AM8:57 PM14h 48m
August6:40 AM8:23 PM13h 43m
September7:14 AM7:30 PM12h 16m
October7:48 AM6:37 PM10h 49m
November7:26 AM4:59 PM9h 33m
December7:56 AM4:51 PM8h 55m

Nearby Stations

New Glasgow, ONMay 4 - October 16 Algonac Wwtp, MI May 3 - October 18 Kingsville Moe, ON April 20 - October 29 Painesville 4 Nw, OH April 15 - November 9 St Thomas Wpcp, ON May 7 - October 13 Grosse Pointe Farms, MI April 29 - October 22

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