Frost Dates for North Bay, ON

Based on data from North Bay A weather station, 4 miles away

Elevation: 206 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. May 15
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. September 29

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 May 21
First Fall Frost September 24

Hard Freeze (−2°C)

Last Spring Hard Freeze April 30
First Fall Hard Freeze October 14
46.32°N, 79.47°W © OpenStreetMap

Growing Season

137 Days May 15 to September 29

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 4a

Avg. annual minimum: −34 to −32°C

Learn more

Köppen Climate

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

Warm summers and cold, snowy winters. A shorter growing season than hot-summer continental. Hardy vegetables, root crops, and cool-season greens do well. Season extension is valuable.

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-8°-12°-17°
February-5°-10°-15°
March1°-4°-9°
April9°4°-1°
May17°12°6°
June22°17°12°
July24°19°14°
August23°18°13°
September18°13°9°
October11°7°2°
November3°0°-4°
December-4°-8°-12°

Precipitation

Precipitation table
Average monthly precipitation (millimeters)
MonthPrecipitation
January76
February66
March58
April71
May94
June107
July109
August91
September119
October104
November102
December81

Sunrise / Sunset

Daylight Eastern Time (ET) Longest: 15h 37m · Shortest: 8h 24m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Eastern Time (ET))
Month Sunrise Sunset Daylight
January8:03 AM4:51 PM8h 47m
February7:30 AM5:35 PM10h 05m
March7:39 AM7:15 PM11h 36m
April6:38 AM7:58 PM13h 20m
May5:50 AM8:38 PM14h 47m
June5:30 AM9:05 PM15h 35m
July5:46 AM9:01 PM15h 15m
August6:22 AM8:21 PM13h 59m
September7:03 AM7:21 PM12h 19m
October7:44 AM6:22 PM10h 38m
November7:28 AM4:37 PM9h 09m
December8:01 AM4:26 PM8h 25m

Nearby Stations

Powassan, ONMay 26 - September 18 Barrage Temiscamingue, QC May 16 - October 10 Monetville, ON May 21 - September 23 Dunchurch, ON May 28 - September 18 Sudbury A, ONMay 16 - October 1 Haliburton 3, ON May 28 - September 18

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