Frost Dates for Lake Delton, WI

Based on data from Wisconsin Dells weather station, 1 miles away

Elevation: 915 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 8
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 3

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 14
First Fall Frost September 29

Hard Freeze (28°F)

Last Spring Hard Freeze April 28
First Fall Hard Freeze October 14
43.60°N, 89.79°W © OpenStreetMap

Growing Season

148 Days May 8 to October 3

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
January26°17°8°
February31°21°11°
March43°33°22°
April57°45°33°
May69°57°45°
June79°67°56°
July83°71°60°
August81°69°57°
September73°61°49°
October60°48°37°
November44°35°26°
December32°24°15°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January3.1
February3.1
March5.1
April6.0
May6.2
June7.1
July6.9
August5.5
September5.8
October4.3
November3.0
December2.9

Sunrise / Sunset

Daylight Central Time (CT) Longest: 15h 15m · Shortest: 8h 45m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Central Time (CT))
Month Sunrise Sunset Daylight
January7:35 AM4:41 PM9h 06m
February7:06 AM5:22 PM10h 16m
March7:19 AM6:58 PM11h 38m
April6:23 AM7:36 PM13h 13m
May5:40 AM8:11 PM14h 31m
June5:22 AM8:36 PM15h 14m
July5:36 AM8:33 PM14h 56m
August6:09 AM7:57 PM13h 48m
September6:45 AM7:02 PM12h 17m
October7:21 AM6:07 PM10h 46m
November7:01 AM4:27 PM9h 25m
December7:32 AM4:18 PM8h 46m

Nearby Stations

Baraboo, WIMay 5 - October 5 Reedsburg, WIMay 2 - October 7 Rock Springs 3 Sw, WI April 24 - October 20 Portage Wwtp, WI April 28 - October 10 Mauston 1 Se, WIMay 2 - October 7 Lodi, WIMay 1 - October 10

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