Frost Dates for TROMSO, Norway

Elevation: 97 m

Frost Dates

Last Spring Frost (50%) iA 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. May 21
First Fall Frost (50%) iA 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. October 1
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30% Probability iOnly 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 26
First Fall Frost September 25

Hard Freeze (−2°C)

Last Spring Hard Freeze May 10
First Fall Hard Freeze October 14
69.65°N, 18.93°W © OpenStreetMap

Growing Season

133 Days May 21 to October 1

USDA Hardiness Zone iHardiness 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 5b

Avg. annual minimum: −26 to −23°C

Learn more

Köppen Climate iThe 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.

Köppen climate map

Temperature

-15° -5° 5° 15°
-8°
High: -6°C
Avg: -8°C
Low: -11°C
Jan
-8°
High: -6°C
Avg: -8°C
Low: -10°C
Feb
-5°
High: -3°C
Avg: -5°C
Low: -8°C
Mar
-1°
High: 2°C
Avg: -1°C
Low: -3°C
Apr
4°
High: 7°C
Avg: 4°C
Low: 1°C
May
9°
High: 11°C
Avg: 9°C
Low: 6°C
Jun
13°
High: 15°C
Avg: 13°C
Low: 10°C
Jul
12°
High: 14°C
Avg: 12°C
Low: 9°C
Aug
8°
High: 10°C
Avg: 8°C
Low: 5°C
Sep
1°
High: 3°C
Avg: 1°C
Low: -1°C
Oct
-4°
High: -2°C
Avg: -4°C
Low: -6°C
Nov
-6°
High: -4°C
Avg: -6°C
Low: -9°C
Dec
0°C
−2°C
Avg High Avg Temp Avg Low Light Frost (0°C) Hard Frost (−2°C)

Precipitation

0 mm 50 mm 100 mm
104 mm
104.1 mm
Jan
91 mm
91.4 mm
Feb
99 mm
99.1 mm
Mar
86 mm
86.4 mm
Apr
84 mm
83.8 mm
May
89 mm
88.9 mm
Jun
86 mm
86.4 mm
Jul
97 mm
96.5 mm
Aug
117 mm
116.8 mm
Sep
122 mm
121.9 mm
Oct
91 mm
91.4 mm
Nov
94 mm
94.0 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec0h6.5h11h15.5h21h24h24h17.5h13h8.5h2.5h0h
Jan: 0h (Polar Night)
Feb: 8:38 AM – 3:22 PM · 6h 43m
Mar: 6:31 AM – 5:29 PM · 10h 59m
Apr: 4:14 AM – 7:46 PM · 15h 32m
May: 1:34 AM – 10:26 PM · 20h 53m
Jun: 24h (Midnight Sun)
Jul: 24h (Midnight Sun)
Aug: 3:14 AM – 8:46 PM · 17h 31m
Sep: 5:36 AM – 6:24 PM · 12h 48m
Oct: 7:49 AM – 4:11 PM · 8h 23m
Nov: 10:38 AM – 1:22 PM · 2h 44m
Dec: 0h (Polar Night)
Daylight Longest: 24h 00m · Shortest: 0h 00m

Nearby Stations

TROMSO - LANGNES, Norway May 18 - October 5 HEKKINGEN FYR, Norway May 7 - October 23 STORSTEINNES I BALSFJORD, Norway May 20 - October 3 BARDUFOSS, Norway May 21 - September 30 TORSVAG FYR, Norway May 7 - October 21 DIVIDALEN, Norway May 26 - September 27

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