Frost Dates for Brookport Dam 52, IL

Elevation: 101 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 6
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 27

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 12
First Fall Frost October 23

Hard Freeze (28°F)

Last Spring Hard Freeze March 27
First Fall Hard Freeze November 5
37.13°N, 88.65°W © OpenStreetMap

Growing Season

204 Days April 6 to October 27

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 7a

Avg. annual minimum: 0 to 5°F

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Cfa Humid Subtropical

Hot, humid summers and mild winters with rain year-round. Long growing seasons support a wide variety of vegetables, fruits, and ornamentals. The most common climate in the eastern US.

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
January43°34°25°
February48°38°28°
March58°47°36°
April69°58°46°
May77°67°56°
June85°75°65°
July89°78°68°
August88°77°66°
September82°70°59°
October71°59°47°
November57°47°36°
December47°38°29°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January6.5
February6.9
March6.5
April7.1
May7.9
June8.6
July7.7
August8.8
September7.7
October8.5
November8.0
December8.1

Sunrise / Sunset

Daylight Central Time (CT) Longest: 14h 33m · Shortest: 9h 27m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Central Time (CT))
Month Sunrise Sunset Daylight
January7:13 AM4:55 PM9h 43m
February6:50 AM5:28 PM10h 38m
March7:13 AM6:56 PM11h 43m
April6:26 AM7:24 PM12h 58m
May5:51 AM7:51 PM13h 59m
June5:39 AM8:11 PM14h 32m
July5:51 AM8:10 PM14h 19m
August6:16 AM7:42 PM13h 26m
September6:42 AM6:56 PM12h 13m
October7:09 AM6:10 PM11h 01m
November6:41 AM4:39 PM9h 58m
December7:07 AM4:34 PM9h 28m

Nearby Stations

Paducah, KYApril 5 - October 28 W Paducah 2w, KY April 3 - October 27 Smithland L&D, IL April 3 - October 30 Dixon Springs Agric Ctr, IL April 14 - October 21 Grand Chain Dam 53, IL April 3 - November 5 Bardwell 2 E, KY April 6 - October 30

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