Frost Dates for Concord, WI

Based on data from Oconomowoc Wwtp weather station, 5 miles away

Elevation: 856 ft

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 12
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 6
First Fall Frost October 6

Hard Freeze (28°F)

Last Spring Hard Freeze April 19
First Fall Hard Freeze October 24
43.07°N, -88.60°W © OpenStreetMap

Growing Season

165 Days April 30 to October 12

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°
20°
High: 28°F
Avg: 20°F
Low: 11°F
Jan
23°
High: 32°F
Avg: 23°F
Low: 14°F
Feb
34°
High: 44°F
Avg: 34°F
Low: 25°F
Mar
46°
High: 56°F
Avg: 46°F
Low: 36°F
Apr
58°
High: 69°F
Avg: 58°F
Low: 47°F
May
68°
High: 78°F
Avg: 68°F
Low: 57°F
Jun
72°
High: 82°F
Avg: 72°F
Low: 61°F
Jul
70°
High: 81°F
Avg: 70°F
Low: 60°F
Aug
63°
High: 74°F
Avg: 63°F
Low: 52°F
Sep
50°
High: 61°F
Avg: 50°F
Low: 40°F
Oct
37°
High: 46°F
Avg: 37°F
Low: 29°F
Nov
26°
High: 34°F
Avg: 26°F
Low: 18°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 5.8"
2.2"
2.17"
Jan
2.1"
2.07"
Feb
3.1"
3.15"
Mar
4.2"
4.20"
Apr
4.9"
4.94"
May
5.2"
5.17"
Jun
5.5"
5.51"
Jul
5.8"
5.82"
Aug
5.3"
5.26"
Sep
3.9"
3.90"
Oct
3.0"
3.02"
Nov
2.5"
2.52"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10.5h11.5h13h14.5h15h15h14h12.5h11h9.5h9h
Jan: 7:29 AM – 4:38 PM · 9h 09m
Feb: 6:60 AM – 5:18 PM · 10h 18m
Mar: 7:14 AM – 6:53 PM · 11h 39m
Apr: 6:19 AM – 7:30 PM · 13h 11m
May: 5:36 AM – 8:05 PM · 14h 29m
Jun: 5:19 AM – 8:29 PM · 15h 10m
Jul: 5:33 AM – 8:26 PM · 14h 53m
Aug: 6:05 AM – 7:51 PM · 13h 46m
Sep: 6:40 AM – 6:57 PM · 12h 17m
Oct: 7:16 AM – 6:03 PM · 10h 47m
Nov: 6:55 AM – 4:23 PM · 9h 28m
Dec: 7:25 AM – 4:15 PM · 8h 50m
Daylight Central Time (CT) Longest: 15h 12m · Shortest: 8h 48m

Nearby Stations

Sullivan 3se, WIMay 3 - October 9 Watertown Wwtp, WI April 28 - October 12 Waukesha Wwtp, WI May 1 - October 13 Hartford Wwtp, WI May 8 - October 3 Richfield 3 Ssw, WI April 30 - October 16 Brookfield Wwtp, WI April 30 - October 14

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