Frost Dates for Rustic 9wsw, CO
Elevation: 2347 m
Frost Dates
Last Spring Frost (50%) A 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide.
June 5
First Fall Frost (50%) A 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date.
September 16
30% Probability
Only 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
June 11
First Fall Frost
September 11
Hard Freeze (28°F)
Last Spring Hard Freeze
May 22
First Fall Hard Freeze
September 26
Growing Season
103 Days
June 5 to September 16
USDA Hardiness Zone
Hardiness 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 5b
Avg. annual minimum: −15 to −10°F
Köppen Climate
The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
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.
Temperature
10°
30°
50°
70°
Avg High
Avg Temp
Avg Low
Light Frost (32°F)
Hard Frost (28°F)
Temperature table
| Month | Avg High | Avg Temp | Avg Low |
|---|---|---|---|
| January | 36° | 26° | 15° |
| February | 36° | 26° | 15° |
| March | 44° | 32° | 20° |
| April | 49° | 37° | 25° |
| May | 59° | 46° | 32° |
| June | 72° | 56° | 40° |
| July | 78° | 63° | 48° |
| August | 76° | 61° | 46° |
| September | 69° | 54° | 38° |
| October | 56° | 43° | 29° |
| November | 44° | 33° | 21° |
| December | 36° | 25° | 15° |
Precipitation
0"
2"
4"
4.0"
Precipitation table
| Month | Precipitation |
|---|---|
| January | 2.1 |
| February | 2.1 |
| March | 2.8 |
| April | 3.5 |
| May | 4.0 |
| June | 3.6 |
| July | 3.4 |
| August | 3.1 |
| September | 2.9 |
| October | 3.7 |
| November | 2.6 |
| December | 2.0 |
Sunrise / Sunset
Daylight
Longest: 14h 55m · Shortest: 9h 05m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:18 AM | 4:42 PM | 9h 23m |
| February | 6:47 AM | 5:13 PM | 10h 26m |
| March | 6:10 AM | 5:50 PM | 11h 41m |
| April | 5:27 AM | 6:33 PM | 13h 06m |
| May | 4:52 AM | 7:08 PM | 14h 16m |
| June | 4:33 AM | 7:27 PM | 14h 54m |
| July | 4:41 AM | 7:19 PM | 14h 39m |
| August | 5:11 AM | 6:49 PM | 13h 37m |
| September | 5:52 AM | 6:08 PM | 12h 15m |
| October | 6:33 AM | 5:27 PM | 10h 53m |
| November | 7:10 AM | 4:50 PM | 9h 41m |
| December | 7:27 AM | 4:33 PM | 9h 06m |
Nearby Stations
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 FreeAvailable everywhere: iOS, Android, web, and more!
