Frost Dates for Hidden Spring, ID
Based on data from Boise 7 N weather station, 3 miles away
Elevation: 2867 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 17
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 12
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 28
First Fall Frost
October 5
Hard Freeze (28°F)
Last Spring Hard Freeze
April 27
First Fall Hard Freeze
October 24
Growing Season
148 Days
May 17 to October 12
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 7a
Avg. annual minimum: 0 to 5°F
Köppen Climate
The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Dsa
Hot-Summer Continental (Dry Summer)
Hot, dry summers and cold, wet winters. A continental version of Mediterranean climate. Summer irrigation is essential; cold-hardy crops grow well in the wet season.
Temperature
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 | 37° | 30° | 24° |
| February | 43° | 35° | 27° |
| March | 51° | 42° | 32° |
| April | 58° | 47° | 36° |
| May | 68° | 55° | 43° |
| June | 77° | 63° | 49° |
| July | 88° | 73° | 58° |
| August | 86° | 72° | 58° |
| September | 76° | 63° | 50° |
| October | 61° | 51° | 40° |
| November | 46° | 38° | 30° |
| December | 37° | 30° | 23° |
Precipitation
0"
1"
2"
2.8"
Precipitation table
| Month | Precipitation |
|---|---|
| January | 2.8 |
| February | 2.3 |
| March | 2.8 |
| April | 2.7 |
| May | 2.7 |
| June | 1.9 |
| July | 0.9 |
| August | 0.3 |
| September | 1.4 |
| October | 2.1 |
| November | 2.8 |
| December | 2.8 |
Sunrise / Sunset
Daylight
Mountain Time (MT)
Longest: 15h 16m · Shortest: 8h 44m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 8:22 AM | 5:27 PM | 9h 05m |
| February | 7:52 AM | 6:07 PM | 10h 16m |
| March | 8:05 AM | 7:44 PM | 11h 38m |
| April | 7:09 AM | 8:22 PM | 13h 13m |
| May | 6:25 AM | 8:57 PM | 14h 32m |
| June | 6:08 AM | 9:22 PM | 15h 15m |
| July | 6:22 AM | 9:19 PM | 14h 57m |
| August | 6:55 AM | 8:43 PM | 13h 49m |
| September | 7:31 AM | 7:48 PM | 12h 17m |
| October | 8:07 AM | 6:53 PM | 10h 45m |
| November | 7:48 AM | 5:12 PM | 9h 25m |
| December | 8:18 AM | 5:03 PM | 8h 45m |
Nearby Stations
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