Frost Dates for PORVOO HARABACKA, Finland

Elevation: 16 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. April 30
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 18
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 5
First Fall Frost October 12

Hard Freeze (−2°C)

Last Spring Hard Freeze April 16
First Fall Hard Freeze November 3
60.39°N, 25.61°W © OpenStreetMap

Growing Season

171 Days April 30 to October 18

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 6a

Avg. annual minimum: −23 to −21°C

Learn more

Köppen Climate iThe Köppen climate classification system categorizes climates based on temperature and precipitation patterns.

Dfb Warm-Summer Continental

Warm summers and cold, snowy winters. A shorter growing season than hot-summer continental. Hardy vegetables, root crops, and cool-season greens do well. Season extension is valuable.

Köppen climate map

Temperature

-10° 0° 10° 20°
-4°
High: -2°C
Avg: -4°C
Low: -7°C
Jan
-5°
High: -3°C
Avg: -5°C
Low: -8°C
Feb
-2°
High: 1°C
Avg: -2°C
Low: -5°C
Mar
4°
High: 8°C
Avg: 4°C
Low: 0°C
Apr
10°
High: 15°C
Avg: 10°C
Low: 6°C
May
15°
High: 19°C
Avg: 15°C
Low: 11°C
Jun
18°
High: 22°C
Avg: 18°C
Low: 14°C
Jul
17°
High: 20°C
Avg: 17°C
Low: 13°C
Aug
12°
High: 15°C
Avg: 12°C
Low: 9°C
Sep
6°
High: 8°C
Avg: 6°C
Low: 4°C
Oct
1°
High: 3°C
Avg: 1°C
Low: 0°C
Nov
-2°
High: 0°C
Avg: -2°C
Low: -4°C
Dec
0°C
−2°C
Avg High Avg Temp Avg Low Light Frost (0°C) Hard Frost (−2°C)

Precipitation

0 mm 30 mm 60 mm 90 mm
51 mm
50.8 mm
Jan
41 mm
40.6 mm
Feb
33 mm
33.0 mm
Mar
30 mm
30.5 mm
Apr
41 mm
40.6 mm
May
84 mm
83.8 mm
Jun
84 mm
83.8 mm
Jul
79 mm
78.7 mm
Aug
58 mm
58.4 mm
Sep
61 mm
61.0 mm
Oct
69 mm
68.6 mm
Nov
64 mm
63.5 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec6h8.5h11.5h14.5h17h18.5h18h15.5h12.5h9.5h7h5.5h
Jan: 8:53 AM – 3:07 PM · 6h 14m
Feb: 7:38 AM – 4:22 PM · 8h 44m
Mar: 6:20 AM – 5:40 PM · 11h 20m
Apr: 4:52 AM – 7:08 PM · 14h 16m
May: 3:33 AM – 8:27 PM · 16h 54m
Jun: 2:43 AM – 9:17 PM · 18h 35m
Jul: 3:04 AM – 8:56 PM · 17h 51m
Aug: 4:18 AM – 7:42 PM · 15h 25m
Sep: 5:44 AM – 6:16 PM · 12h 31m
Oct: 7:09 AM – 4:51 PM · 9h 41m
Nov: 8:31 AM – 3:29 PM · 6h 59m
Dec: 9:18 AM – 2:42 PM · 5h 25m
Daylight Longest: 18h 38m · Shortest: 5h 22m

Nearby Stations

PORVOO EMASALO, Finland April 27 - October 21 HELSINKI-MALMIN LENTOASEMA, Finland April 30 - October 16 VANTAA HELSINKI-VANTAAN LENTOA, Finland May 2 - October 15 HELSINKI KUMPULA, Finland April 28 - October 18 HELSINKI ISOSAARI, Finland April 24 - October 24 HELSINKI ILMALA, Finland April 28 - October 19

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