Frost Dates for PORVOO KALBADAGRUND, Finland

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 28
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 21
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 4
First Fall Frost October 11

Hard Freeze (−2°C)

Last Spring Hard Freeze April 14
First Fall Hard Freeze October 31
59.98°N, 25.60°W © OpenStreetMap

Growing Season

176 Days April 28 to October 21

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 6b

Avg. annual minimum: −21 to −18°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: -6°C
Jan
-4°
High: -2°C
Avg: -4°C
Low: -7°C
Feb
-1°
High: 1°C
Avg: -1°C
Low: -4°C
Mar
4°
High: 7°C
Avg: 4°C
Low: 1°C
Apr
10°
High: 13°C
Avg: 10°C
Low: 5°C
May
14°
High: 18°C
Avg: 14°C
Low: 10°C
Jun
18°
High: 21°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
7°
High: 9°C
Avg: 7°C
Low: 4°C
Oct
2°
High: 4°C
Avg: 2°C
Low: 1°C
Nov
-1°
High: 1°C
Avg: -1°C
Low: -3°C
Dec
0°C
−2°C
Avg High Avg Temp Avg Low Light Frost (0°C) Hard Frost (−2°C)

Precipitation

0 mm 20 mm 40 mm 60 mm 80 mm
51 mm
50.8 mm
Jan
43 mm
43.2 mm
Feb
25 mm
25.4 mm
Mar
28 mm
27.9 mm
Apr
36 mm
35.6 mm
May
53 mm
53.3 mm
Jun
61 mm
61.0 mm
Jul
71 mm
71.1 mm
Aug
64 mm
63.5 mm
Sep
71 mm
71.1 mm
Oct
69 mm
68.6 mm
Nov
69 mm
68.6 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec6.5h9h11.5h14h17h18.5h17.5h15.5h12.5h9.5h7h5.5h
Jan: 8:49 AM – 3:11 PM · 6h 21m
Feb: 7:37 AM – 4:23 PM · 8h 47m
Mar: 6:20 AM – 5:40 PM · 11h 21m
Apr: 4:53 AM – 7:07 PM · 14h 13m
May: 3:36 AM – 8:24 PM · 16h 49m
Jun: 2:47 AM – 9:13 PM · 18h 26m
Jul: 3:08 AM – 8:52 PM · 17h 44m
Aug: 4:19 AM – 7:41 PM · 15h 21m
Sep: 5:45 AM – 6:15 PM · 12h 31m
Oct: 7:08 AM – 4:52 PM · 9h 44m
Nov: 8:28 AM – 3:32 PM · 7h 04m
Dec: 9:13 AM – 2:47 PM · 5h 34m
Daylight Longest: 18h 29m · Shortest: 5h 31m

Nearby Stations

PORVOO EMASALO, Finland April 27 - October 21 HELSINKI ISOSAARI, Finland April 24 - October 24 HELSINKI HARMAJA, Finland April 27 - October 19 HELSINKI HELSINGIN MAJAKKA, Finland April 17 - November 13 HELSINKI KAISANIEMI AWS, Finland April 28 - October 19 HELSINKI RAUTATIENTORI, Finland April 27 - October 20

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