Frost Dates for Wyoming, IL

Based on data from Princeville weather station, 9 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 22
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 14
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 29
First Fall Frost October 8

Hard Freeze (28°F)

Last Spring Hard Freeze April 12
First Fall Hard Freeze October 26
41.06°N, -89.77°W © OpenStreetMap

Growing Season

175 Days April 22 to October 14

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 5b

Avg. annual minimum: −15 to −10°F (−26 to −23°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°
24°
High: 33°F
Avg: 24°F
Low: 15°F
Jan
28°
High: 37°F
Avg: 28°F
Low: 18°F
Feb
39°
High: 50°F
Avg: 39°F
Low: 28°F
Mar
51°
High: 64°F
Avg: 51°F
Low: 39°F
Apr
63°
High: 75°F
Avg: 63°F
Low: 51°F
May
72°
High: 83°F
Avg: 72°F
Low: 61°F
Jun
74°
High: 86°F
Avg: 74°F
Low: 63°F
Jul
72°
High: 84°F
Avg: 72°F
Low: 61°F
Aug
65°
High: 78°F
Avg: 65°F
Low: 52°F
Sep
53°
High: 65°F
Avg: 53°F
Low: 41°F
Oct
40°
High: 51°F
Avg: 40°F
Low: 30°F
Nov
29°
High: 37°F
Avg: 29°F
Low: 20°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" 7.9"
3.7"
3.72"
Jan
4.0"
4.01"
Feb
5.4"
5.39"
Mar
5.9"
5.89"
Apr
6.2"
6.20"
May
6.4"
6.37"
Jun
7.4"
7.39"
Jul
7.9"
7.87"
Aug
7.4"
7.36"
Sep
5.2"
5.22"
Oct
4.5"
4.50"
Nov
4.5"
4.50"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9.5h10.5h11.5h13h14.5h15h14.5h13.5h12.5h11h9.5h9h
Jan: 7:19 AM – 4:41 PM · 9h 22m
Feb: 6:47 AM – 5:13 PM · 10h 25m
Mar: 6:10 AM – 5:50 PM · 11h 40m
Apr: 5:27 AM – 6:33 PM · 13h 06m
May: 4:51 AM – 7:09 PM · 14h 17m
Jun: 4:32 AM – 7:28 PM · 14h 56m
Jul: 4:40 AM – 7:20 PM · 14h 40m
Aug: 5:11 AM – 6:49 PM · 13h 38m
Sep: 5:52 AM – 6:08 PM · 12h 15m
Oct: 6:34 AM – 5:26 PM · 10h 53m
Nov: 7:10 AM – 4:50 PM · 9h 40m
Dec: 7:28 AM – 4:32 PM · 9h 04m
Daylight Longest: 14h 57m · Shortest: 9h 03m

Nearby Stations

Peoria Gtr Peoria AP, IL April 16 - October 23 Lacon, ILApril 20 - October 17 Galva, ILApril 26 - October 12 Kewanee 1 E, IL April 24 - October 17 Altona, ILApril 28 - October 12 Knoxville, IL April 21 - October 20

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