Frost Dates for Columbus Junction, IA

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 26
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 10
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 2
First Fall Frost October 3

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze April 15
First Fall Hard Freeze October 21
41.28°N, -91.36°W © OpenStreetMap

Growing Season

167 Days April 26 to October 10

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

Learn more

Temperature

10° 30° 50° 70° 90°
20°
High: 30°
Avg: 20°
Low: 11°
Jan
24°
High: 34°
Avg: 24°
Low: 14°
Feb
37°
High: 48°
Avg: 37°
Low: 26°
Mar
50°
High: 62°
Avg: 50°
Low: 38°
Apr
61°
High: 72°
Avg: 61°
Low: 50°
May
70°
High: 80°
Avg: 70°
Low: 59°
Jun
73°
High: 84°
Avg: 73°
Low: 63°
Jul
72°
High: 82°
Avg: 72°
Low: 61°
Aug
64°
High: 76°
Avg: 64°
Low: 52°
Sep
51°
High: 63°
Avg: 51°
Low: 40°
Oct
38°
High: 48°
Avg: 38°
Low: 27°
Nov
26°
High: 35°
Avg: 26°
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" 6.8"
2.3"
2.25"
Jan
2.7"
2.69"
Feb
3.8"
3.83"
Mar
5.4"
5.37"
Apr
5.8"
5.82"
May
6.3"
6.27"
Jun
6.3"
6.29"
Jul
6.8"
6.80"
Aug
6.5"
6.55"
Sep
5.1"
5.06"
Oct
3.7"
3.72"
Nov
3.2"
3.21"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h14h15h15h14h12h11h10h9h
Jan: 7:20 AM – 4:40 PM · 9h 20m
Feb: 6:48 AM – 5:12 PM · 10h 24m
Mar: 6:10 AM – 5:50 PM · 11h 40m
Apr: 5:27 AM – 6:33 PM · 13h 07m
May: 4:50 AM – 7:10 PM · 14h 19m
Jun: 4:31 AM – 7:29 PM · 14h 58m
Jul: 4:39 AM – 7:21 PM · 14h 42m
Aug: 5:10 AM – 6:50 PM · 13h 39m
Sep: 5:52 AM – 6:08 PM · 12h 16m
Oct: 6:34 AM – 5:26 PM · 10h 52m
Nov: 7:11 AM – 4:49 PM · 9h 38m
Dec: 7:29 AM – 4:31 PM · 9h 02m
Daylight Longest: 14h 59m · Shortest: 9h 01m

Nearby Stations

New Boston Dam 17, IL April 14 - October 24 Muscatine, IA April 24 - October 14 Washington, IA April 28 - October 11 Illinois City Dam 16, IL April 18 - October 24 Muscatine 2n, IA April 18 - October 22 Iowa City, IAApril 29 - October 9

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