Frost Dates for Grandview, IL

Based on data from Springfield #2 weather station, 3 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 15
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 22
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 20
First Fall Frost October 17

Hard Freeze (28°F)

Last Spring Hard Freeze April 5
First Fall Hard Freeze November 1
39.82°N, -89.62°W © OpenStreetMap

Growing Season

190 Days April 15 to October 22

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°
27°
High: 36°F
Avg: 27°F
Low: 19°F
Jan
31°
High: 41°F
Avg: 31°F
Low: 22°F
Feb
42°
High: 52°F
Avg: 42°F
Low: 31°F
Mar
53°
High: 65°F
Avg: 53°F
Low: 41°F
Apr
63°
High: 74°F
Avg: 63°F
Low: 53°F
May
73°
High: 83°F
Avg: 73°F
Low: 63°F
Jun
76°
High: 86°F
Avg: 76°F
Low: 66°F
Jul
74°
High: 84°F
Avg: 74°F
Low: 64°F
Aug
67°
High: 78°F
Avg: 67°F
Low: 56°F
Sep
55°
High: 66°F
Avg: 55°F
Low: 44°F
Oct
43°
High: 53°F
Avg: 43°F
Low: 33°F
Nov
33°
High: 41°F
Avg: 33°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" 7.6"
3.5"
3.52"
Jan
2.9"
2.94"
Feb
5.0"
5.02"
Mar
6.9"
6.93"
Apr
7.6"
7.61"
May
7.3"
7.33"
Jun
6.3"
6.34"
Jul
5.5"
5.48"
Aug
5.0"
5.00"
Sep
4.6"
4.58"
Oct
5.0"
5.05"
Nov
4.3"
4.30"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9.5h10.5h11.5h13h14h15h14.5h13.5h12h11h10h9h
Jan: 7:16 AM – 4:44 PM · 9h 29m
Feb: 6:45 AM – 5:15 PM · 10h 29m
Mar: 6:09 AM – 5:51 PM · 11h 41m
Apr: 5:28 AM – 6:32 PM · 13h 04m
May: 4:54 AM – 7:06 PM · 14h 12m
Jun: 4:36 AM – 7:24 PM · 14h 48m
Jul: 4:43 AM – 7:17 PM · 14h 33m
Aug: 5:13 AM – 6:47 PM · 13h 34m
Sep: 5:53 AM – 6:07 PM · 12h 15m
Oct: 6:32 AM – 5:28 PM · 10h 55m
Nov: 7:07 AM – 4:53 PM · 9h 45m
Dec: 7:24 AM – 4:36 PM · 9h 12m
Daylight Longest: 14h 49m · Shortest: 9h 11m

Nearby Stations

Springfield Capital AP, IL April 14 - October 20 Athens 4sw, IL April 19 - October 19 Petersburg 1e, IL April 13 - October 21 Virden, ILApril 7 - October 29 Mason City 4se, IL April 17 - October 18 Jacksonville 2e, IL April 19 - October 17

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