Frost Dates for Custer Co AP, SD

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 23
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. September 24
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 30
First Fall Frost September 19

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 10
First Fall Hard Freeze October 5
43.73°N, -103.61°W © OpenStreetMap

Growing Season

124 Days May 23 to September 24

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

Learn more

Temperature

10° 30° 50° 70°
25°
High: 35°
Avg: 25°
Low: 15°
Jan
25°
High: 35°
Avg: 25°
Low: 15°
Feb
33°
High: 44°
Avg: 33°
Low: 22°
Mar
39°
High: 50°
Avg: 39°
Low: 29°
Apr
49°
High: 60°
Avg: 49°
Low: 38°
May
59°
High: 71°
Avg: 59°
Low: 47°
Jun
67°
High: 79°
Avg: 67°
Low: 54°
Jul
65°
High: 78°
Avg: 65°
Low: 52°
Aug
56°
High: 69°
Avg: 56°
Low: 43°
Sep
43°
High: 54°
Avg: 43°
Low: 32°
Oct
33°
High: 43°
Avg: 33°
Low: 22°
Nov
25°
High: 35°
Avg: 25°
Low: 16°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 1" 2" 3" 4.0"
1.6"
1.55"
Jan
1.4"
1.40"
Feb
2.1"
2.08"
Mar
3.1"
3.14"
Apr
3.4"
3.37"
May
3.7"
3.66"
Jun
4.0"
3.96"
Jul
3.0"
2.96"
Aug
2.6"
2.64"
Sep
1.8"
1.80"
Oct
1.5"
1.48"
Nov
1.3"
1.31"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h15h15h15h14h12h11h9h9h
Jan: 7:27 AM – 4:33 PM · 9h 05m
Feb: 6:52 AM – 5:08 PM · 10h 16m
Mar: 6:11 AM – 5:49 PM · 11h 38m
Apr: 5:23 AM – 6:37 PM · 13h 13m
May: 4:44 AM – 7:16 PM · 14h 32m
Jun: 4:23 AM – 7:37 PM · 15h 15m
Jul: 4:31 AM – 7:29 PM · 14h 57m
Aug: 5:06 AM – 6:54 PM · 13h 49m
Sep: 5:52 AM – 6:08 PM · 12h 17m
Oct: 6:37 AM – 5:23 PM · 10h 46m
Nov: 7:18 AM – 4:42 PM · 9h 25m
Dec: 7:38 AM – 4:22 PM · 8h 45m
Daylight Longest: 15h 16m · Shortest: 8h 44m

Nearby Stations

Custer, SDMay 18 - September 28 Mt Rushmore Nmem, SD May 15 - October 1 Wind Cave, SD May 15 - September 29 Hill City, SD June 1 - September 10 Edgemont 23 Nnw, SD May 18 - September 27 Hot Springs, SD May 16 - September 27

Plan Your Garden with Planter

Now that you know your frost dates, use Planter to plan your veggie garden! Planter is an easy drag-and-drop garden planner with personalized planting schedules.

Try Planter For Free

Available everywhere: iOS, Android, web, and more!

Planter app garden planner preview