Frost Dates for Heart Butte Dam, ND

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 14
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 29
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 20
First Fall Frost September 24

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 5
First Fall Hard Freeze October 6
46.59°N, -101.81°W © OpenStreetMap

Growing Season

138 Days May 14 to September 29

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 4a

Learn more

Temperature

0° 30° 60° 90°
14°
High: 25°
Avg: 14°
Low: 3°
Jan
18°
High: 29°
Avg: 18°
Low: 6°
Feb
29°
High: 41°
Avg: 29°
Low: 17°
Mar
42°
High: 55°
Avg: 42°
Low: 29°
Apr
54°
High: 66°
Avg: 54°
Low: 41°
May
64°
High: 76°
Avg: 64°
Low: 52°
Jun
70°
High: 84°
Avg: 70°
Low: 57°
Jul
69°
High: 83°
Avg: 69°
Low: 55°
Aug
59°
High: 73°
Avg: 59°
Low: 45°
Sep
44°
High: 57°
Avg: 44°
Low: 32°
Oct
30°
High: 41°
Avg: 30°
Low: 19°
Nov
19°
High: 30°
Avg: 19°
Low: 9°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 1" 2" 3" 3.9"
1.3"
1.31"
Jan
1.1"
1.12"
Feb
1.8"
1.77"
Mar
3.0"
2.98"
Apr
3.4"
3.35"
May
3.6"
3.58"
Jun
3.9"
3.90"
Jul
3.3"
3.25"
Aug
3.0"
3.00"
Sep
2.7"
2.70"
Oct
1.9"
1.86"
Nov
1.3"
1.25"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h15h16h15h14h12h11h9h8h
Jan: 7:37 AM – 4:23 PM · 8h 46m
Feb: 6:58 AM – 5:02 PM · 10h 04m
Mar: 6:12 AM – 5:48 PM · 11h 36m
Apr: 5:20 AM – 6:40 PM · 13h 21m
May: 4:36 AM – 7:24 PM · 14h 49m
Jun: 4:12 AM – 7:48 PM · 15h 37m
Jul: 4:21 AM – 7:39 PM · 15h 17m
Aug: 4:60 AM – 7:00 PM · 14h 00m
Sep: 5:51 AM – 6:09 PM · 12h 19m
Oct: 6:41 AM – 5:19 PM · 10h 38m
Nov: 7:26 AM – 4:34 PM · 9h 08m
Dec: 7:49 AM – 4:11 PM · 8h 23m
Daylight Longest: 15h 38m · Shortest: 8h 22m

Nearby Stations

Carson, NDMay 19 - September 25 Almont, NDMay 17 - September 21 Hebron, NDMay 19 - September 21 New Salem 5nw, ND May 18 - September 24 Mott, NDMay 16 - September 25 Pretty Rock, ND May 20 - September 23

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