Frost Dates for Rio Grande Rsvr, CO
Elevation: 2893 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 15
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 11
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 21
First Fall Frost
September 5
Hard Freeze (28°F)
Last Spring Hard Freeze
May 31
First Fall Hard Freeze
September 23
Growing Season
88 Days
June 15 to September 11
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 4a
Avg. annual minimum: −30 to −25°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°
20°
50°
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 | 34° | 15° | -4° |
| February | 37° | 17° | -2° |
| March | 43° | 26° | 9° |
| April | 50° | 35° | 20° |
| May | 60° | 45° | 30° |
| June | 71° | 54° | 36° |
| July | 76° | 59° | 42° |
| August | 73° | 57° | 41° |
| September | 68° | 51° | 35° |
| October | 58° | 42° | 25° |
| November | 44° | 28° | 12° |
| December | 34° | 16° | -3° |
Precipitation
0"
2"
4"
6"
7.7"
Precipitation table
| Month | Precipitation |
|---|---|
| January | 6.0 |
| February | 5.1 |
| March | 5.1 |
| April | 4.4 |
| May | 3.6 |
| June | 4.1 |
| July | 4.2 |
| August | 4.7 |
| September | 5.8 |
| October | 7.7 |
| November | 5.9 |
| December | 5.5 |
Sunrise / Sunset
Daylight
Longest: 14h 37m · Shortest: 9h 23m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:10 AM | 4:50 PM | 9h 40m |
| February | 6:42 AM | 5:18 PM | 10h 36m |
| March | 6:09 AM | 5:51 PM | 11h 43m |
| April | 5:31 AM | 6:29 PM | 12h 59m |
| May | 4:59 AM | 7:01 PM | 14h 02m |
| June | 4:42 AM | 7:18 PM | 14h 36m |
| July | 4:49 AM | 7:11 PM | 14h 22m |
| August | 5:16 AM | 6:44 PM | 13h 28m |
| September | 5:53 AM | 6:07 PM | 12h 14m |
| October | 6:30 AM | 5:30 PM | 10h 60m |
| November | 7:02 AM | 4:58 PM | 9h 55m |
| December | 7:18 AM | 4:42 PM | 9h 24m |
Nearby Stations
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