Frost Dates for Gilbert, IA

Based on data from Ames Muni AP weather station, 8 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 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 8
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 2

Hard Freeze (28°F)

Last Spring Hard Freeze April 14
First Fall Hard Freeze October 19
42.11°N, -93.65°W © OpenStreetMap

Growing Season

165 Days April 26 to October 8

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

Avg. annual minimum: −20 to −15°F (−29 to −26°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: 29°F
Avg: 20°F
Low: 11°F
Jan
24°
High: 33°F
Avg: 24°F
Low: 15°F
Feb
37°
High: 47°F
Avg: 37°F
Low: 27°F
Mar
49°
High: 61°F
Avg: 49°F
Low: 38°F
Apr
61°
High: 72°F
Avg: 61°F
Low: 50°F
May
71°
High: 81°F
Avg: 71°F
Low: 60°F
Jun
73°
High: 84°F
Avg: 73°F
Low: 63°F
Jul
71°
High: 82°F
Avg: 71°F
Low: 60°F
Aug
63°
High: 76°F
Avg: 63°F
Low: 51°F
Sep
51°
High: 63°F
Avg: 51°F
Low: 39°F
Oct
37°
High: 47°F
Avg: 37°F
Low: 27°F
Nov
25°
High: 34°F
Avg: 25°F
Low: 17°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 5.7"
1.4"
1.42"
Jan
1.8"
1.82"
Feb
3.1"
3.15"
Mar
4.7"
4.65"
Apr
5.7"
5.72"
May
5.0"
5.00"
Jun
4.9"
4.89"
Jul
4.4"
4.44"
Aug
4.2"
4.22"
Sep
3.9"
3.90"
Oct
3.2"
3.18"
Nov
2.4"
2.37"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9.5h10.5h11.5h13h14.5h15h15h13.5h12.5h11h9.5h9h
Jan: 7:22 AM – 4:38 PM · 9h 16m
Feb: 6:49 AM – 5:11 PM · 10h 22m
Mar: 6:10 AM – 5:50 PM · 11h 40m
Apr: 5:26 AM – 6:34 PM · 13h 09m
May: 4:49 AM – 7:11 PM · 14h 23m
Jun: 4:29 AM – 7:31 PM · 15h 03m
Jul: 4:37 AM – 7:23 PM · 14h 46m
Aug: 5:09 AM – 6:51 PM · 13h 42m
Sep: 5:52 AM – 6:08 PM · 12h 16m
Oct: 6:35 AM – 5:25 PM · 10h 50m
Nov: 7:13 AM – 4:47 PM · 9h 34m
Dec: 7:31 AM – 4:29 PM · 8h 57m
Daylight Longest: 15h 04m · Shortest: 8h 56m

Nearby Stations

Ames 5 Se, IA April 26 - October 12 Ames 8 Wsw, IA April 23 - October 14 Boone, IAApril 28 - October 12 Colo, IAApril 24 - October 12 Ankeny, IAApril 23 - October 15 Des Moines Wsfo-Johnston, IA April 19 - October 18

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