Frost Dates for Stone Park, IL

Based on data from Chicago Ohare Intl AP weather station, 7 miles away

Frost Dates

Last Spring Frost (50%) iA 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. April 16
First Fall Frost (50%) iA 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. October 28
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30% Probability iOnly 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 22
First Fall Frost October 24

Hard Freeze (28°F)

Last Spring Hard Freeze April 5
First Fall Hard Freeze November 7
41.91°N, -87.88°W © OpenStreetMap

Growing Season

195 Days April 16 to October 28

USDA Hardiness Zone iHardiness 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 6a

Avg. annual minimum: −10 to −5°F (−23 to −21°C)

Learn more

Köppen Climate iThe 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

10° 30° 50° 70° 90°
25°
High: 32°F
Avg: 25°F
Low: 19°F
Jan
29°
High: 36°F
Avg: 29°F
Low: 22°F
Feb
39°
High: 47°F
Avg: 39°F
Low: 31°F
Mar
50°
High: 59°F
Avg: 50°F
Low: 40°F
Apr
61°
High: 71°F
Avg: 61°F
Low: 51°F
May
71°
High: 80°F
Avg: 71°F
Low: 61°F
Jun
75°
High: 85°F
Avg: 75°F
Low: 66°F
Jul
74°
High: 83°F
Avg: 74°F
Low: 65°F
Aug
66°
High: 76°F
Avg: 66°F
Low: 57°F
Sep
54°
High: 63°F
Avg: 54°F
Low: 45°F
Oct
41°
High: 48°F
Avg: 41°F
Low: 34°F
Nov
31°
High: 37°F
Avg: 31°F
Low: 24°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 6" 6.7"
2.6"
2.57"
Jan
2.7"
2.66"
Feb
3.5"
3.47"
Mar
4.2"
4.19"
Apr
5.2"
5.20"
May
5.4"
5.39"
Jun
5.2"
5.17"
Jul
6.7"
6.68"
Aug
5.7"
5.73"
Sep
4.2"
4.20"
Oct
3.4"
3.42"
Nov
2.8"
2.82"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9.5h10.5h11.5h13h14.5h15h15h13.5h12.5h11h9.5h9h
Jan: 7:22 AM – 4:38 PM · 9h 16m
Feb: 6:49 AM – 5:11 PM · 10h 22m
Mar: 6:10 AM – 5:50 PM · 11h 40m
Apr: 5:26 AM – 6:34 PM · 13h 09m
May: 4:49 AM – 7:11 PM · 14h 23m
Jun: 4:29 AM – 7:31 PM · 15h 03m
Jul: 4:37 AM – 7:23 PM · 14h 46m
Aug: 5:09 AM – 6:51 PM · 13h 42m
Sep: 5:52 AM – 6:08 PM · 12h 16m
Oct: 6:35 AM – 5:25 PM · 10h 50m
Nov: 7:13 AM – 4:47 PM · 9h 34m
Dec: 7:31 AM – 4:29 PM · 8h 57m
Daylight Longest: 15h 04m · Shortest: 8h 56m

Nearby Stations

Chicago Palwaukee AP, IL April 19 - October 26 Chicago Botanic Garden, IL April 26 - October 21 Streamwood, IL April 30 - October 13 Barrington 3sw, IL April 25 - October 19 Lisle-Morton Arboretum, IL April 28 - October 16 Wheaton 3 Se, IL April 27 - October 17

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