Frost Dates for Toledo 3n, IA

Elevation: 285 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 30
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 9

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 4
First Fall Frost October 3

Hard Freeze (28°F)

Last Spring Hard Freeze April 19
First Fall Hard Freeze October 20
42.04°N, 92.58°W © OpenStreetMap

Growing Season

162 Days April 30 to October 9

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 5a

Avg. annual minimum: −20 to −15°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
January27°18°9°
February32°22°13°
March45°35°25°
April59°48°36°
May70°59°48°
June80°69°59°
July83°73°62°
August81°70°59°
September75°63°51°
October62°51°39°
November46°36°27°
December33°24°16°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January2.4
February2.4
March3.9
April5.7
May7.2
June8.0
July7.3
August6.5
September7.4
October5.5
November4.1
December3.1

Sunrise / Sunset

Daylight Central Time (CT) Longest: 15h 04m · Shortest: 8h 56m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Central Time (CT))
Month Sunrise Sunset Daylight
January7:42 AM4:57 PM9h 16m
February7:14 AM5:36 PM10h 22m
March7:30 AM7:10 PM11h 40m
April6:36 AM7:45 PM13h 09m
May5:55 AM8:18 PM14h 23m
June5:39 AM8:42 PM15h 03m
July5:53 AM8:39 PM14h 47m
August6:23 AM8:06 PM13h 42m
September6:57 AM7:13 PM12h 16m
October7:31 AM6:20 PM10h 50m
November7:08 AM4:42 PM9h 34m
December7:38 AM4:35 PM8h 57m

Nearby Stations

Marshalltown, IA April 28 - October 7 Marshalltown Muni AP, IA April 30 - October 6 Belle Plaine, IA April 28 - October 10 Grinnell 3 Sw, IA May 3 - October 6 Grundy Ctr, IA April 29 - October 9 Vinton, IAMay 3 - October 3

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