Frost Dates for Scalloway, United Kingdom
Based on data from Lerwick weather station, 3 miles away
Elevation: 62 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.
April 18
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.
November 17
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 28
First Fall Frost
November 8
Hard Freeze (−2°C)
Last Spring Hard Freeze
March 10
First Fall Hard Freeze
December 12
Growing Season
213 Days
April 18 to November 17
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 9a
Avg. annual minimum: −7 to −4°C
Köppen Climate
The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Cfb
Oceanic (Marine West Coast)
Mild year-round with cool summers and wet winters. Excellent for cool-season crops like brassicas, peas, and root vegetables. Extended harvest seasons but summer heat-loving crops may struggle.
Temperature
0°
5°
10°
15°
Avg High
Avg Temp
Avg Low
Temperature table
| Month | Avg High | Avg Temp | Avg Low |
|---|---|---|---|
| January | 6° | 4° | 2° |
| February | 6° | 4° | 2° |
| March | 7° | 5° | 2° |
| April | 8° | 6° | 4° |
| May | 11° | 8° | 6° |
| June | 13° | 10° | 8° |
| July | 14° | 12° | 10° |
| August | 15° | 13° | 11° |
| September | 13° | 11° | 9° |
| October | 10° | 8° | 7° |
| November | 8° | 6° | 4° |
| December | 7° | 5° | 3° |
Precipitation
0 mm
50 mm
100 mm
150 mm
Precipitation table
| Month | Precipitation |
|---|---|
| January | 157 |
| February | 122 |
| March | 104 |
| April | 69 |
| May | 64 |
| June | 69 |
| July | 76 |
| August | 94 |
| September | 102 |
| October | 135 |
| November | 147 |
| December | 157 |
Sunrise / Sunset
Daylight
Greenwich Mean Time (GMT)
Longest: 18h 32m · Shortest: 5h 28m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 9:05 AM | 3:23 PM | 6h 19m |
| February | 7:56 AM | 4:42 PM | 8h 46m |
| March | 6:34 AM | 5:55 PM | 11h 21m |
| April | 5:58 AM | 8:12 PM | 14h 14m |
| May | 4:36 AM | 9:26 PM | 16h 51m |
| June | 3:50 AM | 10:19 PM | 18h 29m |
| July | 4:17 AM | 10:04 PM | 17h 47m |
| August | 5:28 AM | 8:50 PM | 15h 22m |
| September | 6:44 AM | 7:15 PM | 12h 31m |
| October | 7:58 AM | 5:41 PM | 9h 43m |
| November | 8:19 AM | 3:21 PM | 7h 02m |
| December | 9:15 AM | 2:46 PM | 5h 30m |
Plan Your Garden with Planter
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