Frost Dates for Napoleon, OH

Elevation: 208 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 24
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. October 21

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 29
First Fall Frost October 15

Hard Freeze (28°F)

Last Spring Hard Freeze April 14
First Fall Hard Freeze November 1
41.39°N, 84.11°W © OpenStreetMap

Growing Season

180 Days April 24 to October 21

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 5b

Avg. annual minimum: −15 to −10°F

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 (32°F) Hard Frost (28°F)
Temperature table
Average monthly temperatures (°F)
Month Avg High Avg Temp Avg Low
January33°25°17°
February36°27°19°
March46°37°28°
April60°48°37°
May72°61°50°
June81°70°60°
July84°74°63°
August83°72°60°
September76°65°53°
October64°53°42°
November49°41°32°
December37°31°24°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January3.5
February3.5
March4.4
April5.1
May5.8
June5.8
July5.4
August5.4
September5.8
October5.3
November5.0
December4.2

Sunrise / Sunset

Daylight Eastern Time (ET) Longest: 14h 60m · Shortest: 9h 00m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Eastern Time (ET))
Month Sunrise Sunset Daylight
January8:06 AM5:26 PM9h 19m
February7:39 AM6:03 PM10h 24m
March7:56 AM7:36 PM11h 40m
April7:03 AM8:10 PM13h 07m
May6:23 AM8:43 PM14h 20m
June6:07 AM9:06 PM14h 59m
July6:21 AM9:03 PM14h 43m
August6:51 AM8:31 PM13h 40m
September7:23 AM7:39 PM12h 16m
October7:56 AM6:47 PM10h 51m
November7:33 AM5:10 PM9h 37m
December8:02 AM5:03 PM9h 01m

Nearby Stations

Napoleon 1sw, OH April 23 - October 24 Wauseon Wtp, OH April 29 - October 16 Defiance, OHApril 22 - October 24 Defiance Mem AP, OH April 28 - October 17 Toledo Express AP, OH April 22 - October 24 Hoytville 2 Ne, OH April 24 - October 21

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