Frost Dates for Orofino, ID
Based on data from Dworshak Fish Hatchery weather station, 4 miles away
Elevation: 1030 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.
April 20
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 20
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
April 27
First Fall Frost
October 12
Hard Freeze (28°F)
Last Spring Hard Freeze
March 28
First Fall Hard Freeze
November 2
Growing Season
183 Days
April 20 to October 20
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 7b
Avg. annual minimum: 5 to 10°F
Köppen Climate
The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Dsb
Warm-Summer Continental (Dry Summer)
Warm, dry summers and cold, snowy winters. Common in mountain regions. Moderate growing season with irrigation needs in summer.
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 | 40° | 34° | 28° |
| February | 46° | 37° | 29° |
| March | 55° | 44° | 33° |
| April | 63° | 50° | 38° |
| May | 72° | 58° | 45° |
| June | 78° | 64° | 51° |
| July | 90° | 72° | 55° |
| August | 90° | 72° | 54° |
| September | 80° | 64° | 48° |
| October | 63° | 51° | 39° |
| November | 48° | 40° | 33° |
| December | 39° | 33° | 28° |
Precipitation
0"
2"
4"
4.0"
Precipitation table
| Month | Precipitation |
|---|---|
| January | 3.6 |
| February | 2.9 |
| March | 3.7 |
| April | 3.9 |
| May | 3.7 |
| June | 3.3 |
| July | 2.9 |
| August | 2.3 |
| September | 2.6 |
| October | 2.9 |
| November | 3.7 |
| December | 4.0 |
Sunrise / Sunset
Daylight
Pacific Time (PT)
Longest: 15h 38m · Shortest: 8h 22m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:32 AM | 4:18 PM | 8h 46m |
| February | 6:58 AM | 5:02 PM | 10h 05m |
| March | 7:07 AM | 6:43 PM | 11h 36m |
| April | 6:05 AM | 7:26 PM | 13h 21m |
| May | 5:17 AM | 8:06 PM | 14h 48m |
| June | 4:57 AM | 8:34 PM | 15h 36m |
| July | 5:13 AM | 8:29 PM | 15h 16m |
| August | 5:50 AM | 7:49 PM | 13h 60m |
| September | 6:30 AM | 6:49 PM | 12h 19m |
| October | 7:11 AM | 5:49 PM | 10h 38m |
| November | 6:56 AM | 4:05 PM | 9h 08m |
| December | 7:29 AM | 3:53 PM | 8h 24m |
Nearby Stations
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