Frost Dates for Grant, CO

Elevation: 2644 m

Frost Dates

Last Spring Frost (50%) June 15

First Fall Frost (50%) September 9

30% Probability

Last Spring Frost June 20

First Fall Frost September 3

Hard Freeze (28°F)

Last Spring Hard Freeze May 30

First Fall Hard Freeze September 22

39.46°N, 105.68°W © OpenStreetMap

Growing Season

86 Days June 15 to September 9

USDA Hardiness Zone

Zone 5b

Avg. annual minimum: −15 to −10°F

Learn more

Köppen Climate

Dfc Subarctic

Short, cool summers and long, very cold winters. Growing seasons of 3–4 months require fast-maturing varieties. Root vegetables, potatoes, and cold-hardy greens are the most reliable.

Köppen climate map

Temperature

0° 20° 40° 60° 80°

22°

Jan

23°

Feb

30°

Mar

36°

Apr

44°

May

54°

Jun

59°

Jul

57°

Aug

50°

Sep

40°

Oct

29°

Nov

21°

Dec

32°F

28°F

Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Temperature table

Average monthly temperatures (°F)
Month	Avg High	Avg Temp	Avg Low
January	34°	22°	9°
February	36°	23°	9°
March	43°	30°	16°
April	49°	36°	22°
May	59°	44°	30°
June	70°	54°	38°
July	75°	59°	43°
August	72°	57°	42°
September	66°	50°	35°
October	54°	40°	25°
November	42°	29°	17°
December	33°	21°	9°

Precipitation

0" 1" 2" 3" 3.1"

1.6"

Jan

1.8"

Feb

2.4"

Mar

2.7"

Apr

2.7"

May

2.7"

Jun

3.1"

Jul

2.8"

Aug

2.3"

Sep

2.5"

Oct

2.1"

Nov

1.6"

Dec

Precipitation table

Average monthly precipitation (inches)
Month	Precipitation
January	1.6
February	1.8
March	2.4
April	2.7
May	2.7
June	2.7
July	3.1
August	2.8
September	2.3
October	2.5
November	2.1
December	1.6

Sunrise / Sunset

Jan: 7:15 AM – 4:45 PM · 9h 30m

Feb: 6:45 AM – 5:15 PM · 10h 30m

Mar: 6:09 AM – 5:51 PM · 11h 41m

Apr: 5:29 AM – 6:31 PM · 13h 03m

May: 4:55 AM – 7:05 PM · 14h 10m

Jun: 4:37 AM – 7:23 PM · 14h 46m

Jul: 4:44 AM – 7:16 PM · 14h 32m

Aug: 5:13 AM – 6:47 PM · 13h 33m

Sep: 5:53 AM – 6:07 PM · 12h 15m

Oct: 6:32 AM – 5:28 PM · 10h 56m

Nov: 7:06 AM – 4:54 PM · 9h 47m

Dec: 7:23 AM – 4:37 PM · 9h 14m

Daylight Longest: 14h 47m · Shortest: 9h 13m

Sunrise and sunset table

Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month	Sunrise	Sunset	Daylight
January	7:15 AM	4:45 PM	9h 30m
February	6:45 AM	5:15 PM	10h 30m
March	6:09 AM	5:51 PM	11h 41m
April	5:29 AM	6:31 PM	13h 03m
May	4:55 AM	7:05 PM	14h 10m
June	4:37 AM	7:23 PM	14h 46m
July	4:44 AM	7:16 PM	14h 32m
August	5:13 AM	6:47 PM	13h 33m
September	5:53 AM	6:07 PM	12h 15m
October	6:32 AM	5:28 PM	10h 56m
November	7:06 AM	4:54 PM	9h 47m
December	7:23 AM	4:37 PM	9h 14m

Nearby Stations

Bailey, COJune 16 - September 8 Cabin Creek, CO June 6 - September 19 Georgetown, CO May 30 - September 19 Dillon 1 E, CO Evergreen, CO May 23 - September 22 Fairplay S Park Rd, CO June 16 - September 9

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!