Frost Dates for Platteville, WI

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 30
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 13
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 May 4
First Fall Frost October 7

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze April 17
First Fall Hard Freeze October 22
42.75°N, -90.47°W © OpenStreetMap

Growing Season

166 Days April 30 to October 13

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 5a

Learn more

Temperature

0° 30° 60° 90°
18°
High: 26°
Avg: 18°
Low: 10°
Jan
22°
High: 31°
Avg: 22°
Low: 14°
Feb
34°
High: 43°
Avg: 34°
Low: 25°
Mar
46°
High: 57°
Avg: 46°
Low: 35°
Apr
58°
High: 69°
Avg: 58°
Low: 47°
May
68°
High: 78°
Avg: 68°
Low: 58°
Jun
72°
High: 82°
Avg: 72°
Low: 62°
Jul
70°
High: 80°
Avg: 70°
Low: 60°
Aug
62°
High: 73°
Avg: 62°
Low: 51°
Sep
50°
High: 60°
Avg: 50°
Low: 39°
Oct
36°
High: 45°
Avg: 36°
Low: 28°
Nov
24°
High: 32°
Avg: 24°
Low: 17°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 6" 6.5"
2.3"
2.29"
Jan
3.1"
3.12"
Feb
4.1"
4.09"
Mar
5.8"
5.82"
Apr
6.0"
6.00"
May
6.1"
6.06"
Jun
6.0"
6.05"
Jul
6.0"
5.97"
Aug
6.5"
6.50"
Sep
4.3"
4.25"
Oct
3.6"
3.57"
Nov
3.1"
3.14"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h14h15h15h14h12h11h10h9h
Jan: 7:24 AM – 4:36 PM · 9h 11m
Feb: 6:50 AM – 5:10 PM · 10h 19m
Mar: 6:10 AM – 5:50 PM · 11h 39m
Apr: 5:25 AM – 6:35 PM · 13h 11m
May: 4:47 AM – 7:13 PM · 14h 27m
Jun: 4:26 AM – 7:34 PM · 15h 08m
Jul: 4:35 AM – 7:25 PM · 14h 51m
Aug: 5:08 AM – 6:52 PM · 13h 45m
Sep: 5:52 AM – 6:08 PM · 12h 16m
Oct: 6:36 AM – 5:24 PM · 10h 48m
Nov: 7:15 AM – 4:45 PM · 9h 30m
Dec: 7:34 AM – 4:26 PM · 8h 52m
Daylight Longest: 15h 09m · Shortest: 8h 51m

Nearby Stations

Dubuque L&D 11, IA April 19 - October 21 Lancaster 4 Wsw, WI April 27 - October 11 Darlington Wwtp, WI May 3 - October 4 Dodgeville Wwtp, WI May 3 - October 7 Galena, ILApril 26 - October 15 Dubuque Rgnl AP, IA April 28 - October 11

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