Frost Dates for Elroy, WI

Based on data from Hillsboro weather station, 7 miles away

Elevation: 978 ft

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 5
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 4

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 11
First Fall Frost September 30

Hard Freeze (28°F)

Last Spring Hard Freeze April 23
First Fall Hard Freeze October 17
43.74°N, 90.27°W © OpenStreetMap

Growing Season

152 Days May 5 to October 4

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 4b

Avg. annual minimum: −25 to −20°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°17°7°
February32°21°10°
March44°33°23°
April58°46°34°
May69°57°46°
June79°67°56°
July83°71°60°
August81°69°58°
September74°61°49°
October60°49°37°
November46°36°27°
December33°24°15°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January2.2
February2.2
March3.6
April4.7
May5.0
June6.6
July5.8
August4.7
September4.6
October3.4
November2.9
December2.3

Sunrise / Sunset

Daylight Central Time (CT) Longest: 15h 16m · Shortest: 8h 44m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Central Time (CT))
Month Sunrise Sunset Daylight
January7:38 AM4:43 PM9h 06m
February7:08 AM5:24 PM10h 16m
March7:22 AM7:00 PM11h 38m
April6:25 AM7:38 PM13h 13m
May5:42 AM8:13 PM14h 32m
June5:24 AM8:39 PM15h 14m
July5:39 AM8:35 PM14h 57m
August6:11 AM7:60 PM13h 48m
September6:47 AM7:04 PM12h 17m
October7:24 AM6:09 PM10h 46m
November7:04 AM4:29 PM9h 25m
December7:34 AM4:20 PM8h 46m

Nearby Stations

Hillsboro 2sw, WI May 12 - September 29 Mauston 1 Se, WIMay 2 - October 7 Reedsburg, WIMay 2 - October 7 Richland Ctr, WIMay 5 - October 6 Cashton, WIApril 27 - October 14 Rock Springs 3 Sw, WI April 24 - October 20

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