Frost Dates for Kalona, IA

Based on data from Iowa City Muni AP weather station, 13 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 21
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 18
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 28
First Fall Frost October 13

Hard Freeze (28°F)

Last Spring Hard Freeze April 9
First Fall Hard Freeze October 28
41.48°N, -91.71°W © OpenStreetMap

Growing Season

180 Days April 21 to October 18

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°
23°
High: 31°F
Avg: 23°F
Low: 15°F
Jan
27°
High: 36°F
Avg: 27°F
Low: 19°F
Feb
40°
High: 50°F
Avg: 40°F
Low: 30°F
Mar
51°
High: 63°F
Avg: 51°F
Low: 40°F
Apr
63°
High: 73°F
Avg: 63°F
Low: 52°F
May
72°
High: 83°F
Avg: 72°F
Low: 62°F
Jun
76°
High: 86°F
Avg: 76°F
Low: 66°F
Jul
74°
High: 84°F
Avg: 74°F
Low: 63°F
Aug
66°
High: 78°F
Avg: 66°F
Low: 54°F
Sep
53°
High: 64°F
Avg: 53°F
Low: 42°F
Oct
40°
High: 49°F
Avg: 40°F
Low: 30°F
Nov
28°
High: 36°F
Avg: 28°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" 6.0"
2.0"
2.00"
Jan
2.2"
2.16"
Feb
3.4"
3.35"
Mar
4.5"
4.50"
Apr
5.4"
5.40"
May
6.0"
6.05"
Jun
5.3"
5.33"
Jul
4.3"
4.34"
Aug
4.0"
3.98"
Sep
3.9"
3.92"
Oct
2.7"
2.66"
Nov
2.0"
1.99"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9.5h10.5h11.5h13h14.5h15h14.5h13.5h12.5h11h9.5h9h
Jan: 7:21 AM – 4:39 PM · 9h 18m
Feb: 6:48 AM – 5:12 PM · 10h 23m
Mar: 6:10 AM – 5:50 PM · 11h 40m
Apr: 5:26 AM – 6:34 PM · 13h 08m
May: 4:50 AM – 7:10 PM · 14h 21m
Jun: 4:30 AM – 7:30 PM · 15h 00m
Jul: 4:38 AM – 7:22 PM · 14h 44m
Aug: 5:10 AM – 6:50 PM · 13h 41m
Sep: 5:52 AM – 6:08 PM · 12h 16m
Oct: 6:35 AM – 5:25 PM · 10h 51m
Nov: 7:12 AM – 4:48 PM · 9h 36m
Dec: 7:30 AM – 4:30 PM · 8h 60m
Daylight Longest: 15h 01m · Shortest: 8h 59m

Nearby Stations

Iowa City, IAApril 29 - October 9 Cedar Rapids Muni AP, IA April 27 - October 11 Williamsburg 1e, IA April 28 - October 9 Tipton, IAApril 21 - October 15 Washington, IA April 28 - October 11 Columbus Junction, IA April 26 - October 10

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