Frost Dates for New Berlin, WI

Based on data from Hales Corners/Whitnall Park/Bo weather station, 5 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. May 3
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 May 9
First Fall Frost October 8

Hard Freeze (28°F)

Last Spring Hard Freeze April 21
First Fall Hard Freeze October 24
42.98°N, -88.11°W © OpenStreetMap

Growing Season

164 Days May 3 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°
21°
High: 30°F
Avg: 21°F
Low: 12°F
Jan
24°
High: 33°F
Avg: 24°F
Low: 15°F
Feb
34°
High: 44°F
Avg: 34°F
Low: 24°F
Mar
45°
High: 56°F
Avg: 45°F
Low: 35°F
Apr
57°
High: 68°F
Avg: 57°F
Low: 46°F
May
67°
High: 78°F
Avg: 67°F
Low: 56°F
Jun
72°
High: 83°F
Avg: 72°F
Low: 61°F
Jul
70°
High: 81°F
Avg: 70°F
Low: 59°F
Aug
63°
High: 74°F
Avg: 63°F
Low: 51°F
Sep
51°
High: 62°F
Avg: 51°F
Low: 40°F
Oct
38°
High: 47°F
Avg: 38°F
Low: 29°F
Nov
27°
High: 35°F
Avg: 27°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" 6" 7.1"
3.1"
3.09"
Jan
3.4"
3.43"
Feb
4.9"
4.90"
Mar
5.3"
5.26"
Apr
5.3"
5.25"
May
5.9"
5.89"
Jun
7.1"
7.08"
Jul
6.4"
6.40"
Aug
5.9"
5.92"
Sep
4.2"
4.18"
Oct
3.8"
3.84"
Nov
4.1"
4.12"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10.5h11.5h13h14.5h15h15h14h12.5h11h9.5h9h
Jan: 7:25 AM – 4:35 PM · 9h 10m
Feb: 6:51 AM – 5:09 PM · 10h 18m
Mar: 6:11 AM – 5:49 PM · 11h 39m
Apr: 5:24 AM – 6:36 PM · 13h 11m
May: 4:46 AM – 7:14 PM · 14h 28m
Jun: 4:25 AM – 7:35 PM · 15h 09m
Jul: 4:34 AM – 7:26 PM · 14h 52m
Aug: 5:07 AM – 6:53 PM · 13h 46m
Sep: 5:52 AM – 6:08 PM · 12h 17m
Oct: 6:36 AM – 5:24 PM · 10h 48m
Nov: 7:15 AM – 4:45 PM · 9h 29m
Dec: 7:35 AM – 4:25 PM · 8h 51m
Daylight Longest: 15h 10m · Shortest: 8h 50m

Nearby Stations

West Allis, WI April 26 - October 22 Milwaukee Mitchell AP, WI April 19 - October 29 Mt Mary College, WI April 26 - October 18 South Milwaukee Wwtp, WI April 22 - October 26 Brookfield Wwtp, WI April 30 - October 14 Waukesha Wwtp, WI May 1 - October 13

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