Frost Dates for Air Force Academy, CO
Based on data from Black Forest 6wnw weather station, 4 miles away
Elevation: 6788 ft
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.
May 11
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.
October 6
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
May 16
First Fall Frost
October 2
Hard Freeze (28°F)
Last Spring Hard Freeze
May 2
First Fall Hard Freeze
October 16
Growing Season
148 Days
May 11 to October 6
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 6a
Avg. annual minimum: −10 to −5°F
Köppen Climate
The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Dfb
Warm-Summer Continental
Warm summers and cold, snowy winters. A shorter growing season than hot-summer continental. Hardy vegetables, root crops, and cool-season greens do well. Season extension is valuable.
Temperature
10°
30°
50°
70°
90°
Avg High
Avg Temp
Avg Low
Light Frost (32°F)
Hard Frost (28°F)
Temperature table
| Month | Avg High | Avg Temp | Avg Low |
|---|---|---|---|
| January | 45° | 32° | 19° |
| February | 45° | 32° | 19° |
| March | 54° | 40° | 26° |
| April | 60° | 45° | 31° |
| May | 69° | 54° | 40° |
| June | 80° | 65° | 50° |
| July | 85° | 70° | 55° |
| August | 83° | 68° | 54° |
| September | 76° | 62° | 47° |
| October | 65° | 50° | 35° |
| November | 53° | 40° | 26° |
| December | 45° | 32° | 19° |
Precipitation
0"
2"
4"
4.7"
Precipitation table
| Month | Precipitation |
|---|---|
| January | 2.0 |
| February | 2.0 |
| March | 3.8 |
| April | 4.7 |
| May | 4.2 |
| June | 4.1 |
| July | 3.5 |
| August | 3.8 |
| September | 3.7 |
| October | 3.6 |
| November | 2.9 |
| December | 2.1 |
Sunrise / Sunset
Daylight
Mountain Time (MT)
Longest: 14h 45m · Shortest: 9h 15m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:22 AM | 4:55 PM | 9h 33m |
| February | 6:58 AM | 5:30 PM | 10h 32m |
| March | 7:18 AM | 6:60 PM | 11h 42m |
| April | 6:29 AM | 7:30 PM | 13h 02m |
| May | 5:51 AM | 7:59 PM | 14h 08m |
| June | 5:38 AM | 8:21 PM | 14h 44m |
| July | 5:50 AM | 8:19 PM | 14h 29m |
| August | 6:18 AM | 7:49 PM | 13h 32m |
| September | 6:47 AM | 7:01 PM | 12h 14m |
| October | 7:16 AM | 6:13 PM | 10h 57m |
| November | 6:50 AM | 4:39 PM | 9h 49m |
| December | 7:17 AM | 4:33 PM | 9h 16m |
Nearby Stations
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