Frost Dates for Aspen 1sw, CO
Elevation: 2492 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 2
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 23
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 8
First Fall Frost
September 19
Hard Freeze (28°F)
Last Spring Hard Freeze
May 18
First Fall Hard Freeze
October 1
Growing Season
113 Days
June 2 to September 23
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
0°
20°
40°
60°
80°
Avg High
Avg Temp
Avg Low
Light Frost (32°F)
Hard Frost (28°F)
Temperature table
| Month | Avg High | Avg Temp | Avg Low |
|---|---|---|---|
| January | 32° | 21° | 10° |
| February | 35° | 24° | 13° |
| March | 43° | 31° | 20° |
| April | 50° | 38° | 27° |
| May | 60° | 48° | 35° |
| June | 71° | 56° | 42° |
| July | 76° | 62° | 48° |
| August | 73° | 60° | 47° |
| September | 67° | 53° | 40° |
| October | 55° | 43° | 30° |
| November | 42° | 31° | 19° |
| December | 32° | 21° | 10° |
Precipitation
0"
2"
4"
4.4"
Precipitation table
| Month | Precipitation |
|---|---|
| January | 3.1 |
| February | 3.1 |
| March | 4.3 |
| April | 4.1 |
| May | 3.8 |
| June | 3.0 |
| July | 3.1 |
| August | 3.1 |
| September | 3.4 |
| October | 4.4 |
| November | 4.2 |
| December | 3.2 |
Sunrise / Sunset
Daylight
Mountain Time (MT)
Longest: 14h 46m · Shortest: 9h 14m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:31 AM | 5:03 PM | 9h 32m |
| February | 7:06 AM | 5:38 PM | 10h 31m |
| March | 7:26 AM | 7:08 PM | 11h 42m |
| April | 6:37 AM | 7:39 PM | 13h 02m |
| May | 5:59 AM | 8:08 PM | 14h 09m |
| June | 5:45 AM | 8:30 PM | 14h 45m |
| July | 5:58 AM | 8:28 PM | 14h 30m |
| August | 6:25 AM | 7:58 PM | 13h 32m |
| September | 6:55 AM | 7:09 PM | 12h 14m |
| October | 7:24 AM | 6:21 PM | 10h 57m |
| November | 6:58 AM | 4:47 PM | 9h 48m |
| December | 7:26 AM | 4:41 PM | 9h 15m |
Nearby Stations
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