Frost Dates for BJOERNOEYA, Norway
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 4
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 28
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 9
First Fall Frost
September 20
Hard Freeze (−2°C)
Last Spring Hard Freeze
May 18
First Fall Hard Freeze
October 17
Growing Season
116 Days
June 4 to September 28
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 6b
Avg. annual minimum: −21 to −18°C
Köppen Climate
The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
ET
Tundra
No true summer — the warmest month averages below 10°C (50°F). Growing is limited to hardy greens, root crops, and cold-frames during the brief warm period. Permafrost restricts root depth.
Temperature
-10°
-5°
0°
5°
10°
Avg High
Avg Temp
Avg Low
Light Frost (0°C)
Hard Frost (−2°C)
Temperature table
| Month | Avg High | Avg Temp | Avg Low |
|---|---|---|---|
| January | -2° | -4° | -6° |
| February | -3° | -5° | -7° |
| March | -3° | -5° | -7° |
| April | -1° | -3° | -5° |
| May | 1° | 0° | -1° |
| June | 4° | 3° | 2° |
| July | 6° | 5° | 5° |
| August | 6° | 6° | 5° |
| September | 5° | 4° | 3° |
| October | 2° | 1° | 0° |
| November | 0° | -1° | -3° |
| December | -1° | -3° | -5° |
Precipitation
0 mm
20 mm
40 mm
60 mm
Precipitation table
| Month | Precipitation |
|---|---|
| January | 58 |
| February | 56 |
| March | 36 |
| April | 25 |
| May | 10 |
| June | 3 |
| July | 15 |
| August | 18 |
| September | 46 |
| October | 41 |
| November | 69 |
| December | 69 |
Sunrise / Sunset
Daylight
Longest: 24h 00m · Shortest: 0h 00m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | – | – | 0h (polar night) |
| February | 9:54 AM | 2:06 PM | 4h 12m |
| March | 6:41 AM | 5:19 PM | 10h 38m |
| April | 3:33 AM | 8:27 PM | 16h 54m |
| May | – | – | 24h (midnight sun) |
| June | – | – | 24h (midnight sun) |
| July | – | – | 24h (midnight sun) |
| August | 1:51 AM | 10:09 PM | 20h 19m |
| September | 5:28 AM | 6:32 PM | 13h 04m |
| October | 8:31 AM | 3:29 PM | 6h 59m |
| November | – | – | 0h (polar night) |
| December | – | – | 0h (polar night) |
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