Frost Dates for Keene 3s, 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 20
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 20
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 25
First Fall Frost September 14

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 10
First Fall Hard Freeze September 28
47.90°N, -102.92°W © OpenStreetMap

Growing Season

123 Days May 20 to September 20

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°
13°
High: 22°
Avg: 13°
Low: 4°
Jan
18°
High: 27°
Avg: 18°
Low: 8°
Feb
29°
High: 40°
Avg: 29°
Low: 19°
Mar
43°
High: 56°
Avg: 43°
Low: 30°
Apr
54°
High: 67°
Avg: 54°
Low: 41°
May
63°
High: 76°
Avg: 63°
Low: 50°
Jun
69°
High: 83°
Avg: 69°
Low: 55°
Jul
69°
High: 83°
Avg: 69°
Low: 54°
Aug
59°
High: 73°
Avg: 59°
Low: 45°
Sep
44°
High: 56°
Avg: 44°
Low: 32°
Oct
29°
High: 39°
Avg: 29°
Low: 20°
Nov
17°
High: 26°
Avg: 17°
Low: 8°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 5.0"
2.7"
2.73"
Jan
2.3"
2.25"
Feb
3.5"
3.55"
Mar
3.9"
3.93"
Apr
5.0"
4.98"
May
5.0"
5.05"
Jun
4.8"
4.82"
Jul
4.3"
4.29"
Aug
4.2"
4.16"
Sep
3.6"
3.57"
Oct
3.0"
3.00"
Nov
2.9"
2.88"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h15h16h15h14h12h11h9h8h
Jan: 7:42 AM – 4:18 PM · 8h 36m
Feb: 7:01 AM – 4:59 PM · 9h 59m
Mar: 6:12 AM – 5:48 PM · 11h 35m
Apr: 5:18 AM – 6:42 PM · 13h 25m
May: 4:32 AM – 7:28 PM · 14h 57m
Jun: 4:06 AM – 7:54 PM · 15h 48m
Jul: 4:17 AM – 7:43 PM · 15h 27m
Aug: 4:57 AM – 7:03 PM · 14h 06m
Sep: 5:50 AM – 6:10 PM · 12h 20m
Oct: 6:43 AM – 5:17 PM · 10h 34m
Nov: 7:30 AM – 4:30 PM · 8h 59m
Dec: 7:54 AM – 4:06 PM · 8h 12m
Daylight Longest: 15h 49m · Shortest: 8h 11m

Nearby Stations

Watford City, ND May 9 - September 27 Watford City 14s, ND May 22 - September 17 Tioga 1e, NDMay 11 - September 26 Grassy Butte 2ene, ND May 18 - September 23 Killdeer, NDMay 21 - September 23 Williston Sloulin Intl AP, ND May 21 - September 21

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