Frost Dates for Warson Woods, MO

Based on data from St Louis Sci Ctr weather station, 6 miles away

Elevation: 535 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. April 1
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. November 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 April 7
First Fall Frost October 31

Hard Freeze (28°F)

Last Spring Hard Freeze March 22
First Fall Hard Freeze November 15
38.61°N, 90.38°W © OpenStreetMap

Growing Season

217 Days April 1 to November 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 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.
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
January41°33°25°
February46°37°28°
March56°47°38°
April68°58°48°
May77°68°59°
June86°77°67°
July90°81°72°
August89°79°70°
September82°72°62°
October70°60°50°
November56°48°39°
December45°37°30°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January4.3
February4.1
March5.9
April5.7
May5.7
June6.3
July9.3
August8.3
September7.0
October6.5
November7.4
December5.1

Sunrise / Sunset

Daylight Central Time (CT) Longest: 14h 42m · Shortest: 9h 18m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Central Time (CT))
Month Sunrise Sunset Daylight
January7:23 AM4:58 PM9h 35m
February6:59 AM5:32 PM10h 33m
March7:20 AM7:02 PM11h 42m
April6:31 AM7:32 PM13h 01m
May5:54 AM8:00 PM14h 06m
June5:41 AM8:22 PM14h 41m
July5:53 AM8:20 PM14h 27m
August6:20 AM7:50 PM13h 30m
September6:48 AM7:03 PM12h 14m
October7:17 AM6:15 PM10h 58m
November6:51 AM4:42 PM9h 51m
December7:18 AM4:36 PM9h 19m

Nearby Stations

Cahokia, ILApril 6 - October 27 Cahokia St Louis AP, IL April 8 - October 26 St Louis Lambert Intl AP, MO April 2 - November 4 St Charles 7 Ssw, MO April 4 - October 29 Alton - Melvin Price L&D, IL April 4 - November 5 St Charles Elm Pt, MO April 8 - October 29

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