Frost Dates for St Sebastien, QC

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 27
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. September 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 June 1
First Fall Frost September 14

Hard Freeze (−2°C)

Last Spring Hard Freeze May 10
First Fall Hard Freeze October 7
45.77°N, -70.95°W © OpenStreetMap

Growing Season

117 Days May 27 to September 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 4b

Avg. annual minimum: −25 to −20°F (−32 to −29°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

-20° -5° 10° 25°
-11°
High: -6°C
Avg: -11°C
Low: -17°C
Jan
-10°
High: -5°C
Avg: -10°C
Low: -16°C
Feb
-4°
High: 1°C
Avg: -4°C
Low: -9°C
Mar
3°
High: 8°C
Avg: 3°C
Low: -2°C
Apr
10°
High: 16°C
Avg: 10°C
Low: 4°C
May
16°
High: 21°C
Avg: 16°C
Low: 10°C
Jun
18°
High: 23°C
Avg: 18°C
Low: 13°C
Jul
17°
High: 23°C
Avg: 17°C
Low: 12°C
Aug
13°
High: 18°C
Avg: 13°C
Low: 8°C
Sep
6°
High: 11°C
Avg: 6°C
Low: 1°C
Oct
0°
High: 4°C
Avg: 0°C
Low: -4°C
Nov
-7°
High: -3°C
Avg: -7°C
Low: -12°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 150 mm
86 mm
86.4 mm
Jan
91 mm
91.4 mm
Feb
84 mm
83.8 mm
Mar
94 mm
94.0 mm
Apr
107 mm
106.7 mm
May
127 mm
127.0 mm
Jun
127 mm
127.0 mm
Jul
117 mm
116.8 mm
Aug
109 mm
109.2 mm
Sep
114 mm
114.3 mm
Oct
94 mm
94.0 mm
Nov
107 mm
106.7 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h11.5h13.5h14.5h15.5h15h14h12.5h10.5h9h8.5h
Jan: 7:34 AM – 4:26 PM · 8h 51m
Feb: 6:56 AM – 5:04 PM · 10h 08m
Mar: 6:12 AM – 5:48 PM · 11h 37m
Apr: 5:21 AM – 6:39 PM · 13h 18m
May: 4:38 AM – 7:22 PM · 14h 44m
Jun: 4:15 AM – 7:45 PM · 15h 30m
Jul: 4:24 AM – 7:36 PM · 15h 11m
Aug: 5:02 AM – 6:58 PM · 13h 57m
Sep: 5:51 AM – 6:09 PM · 12h 18m
Oct: 6:40 AM – 5:20 PM · 10h 40m
Nov: 7:24 AM – 4:36 PM · 9h 13m
Dec: 7:45 AM – 4:15 PM · 8h 30m
Daylight Longest: 15h 32m · Shortest: 8h 28m

Nearby Stations

Lac Megantic 2, QC May 24 - September 26 St Ludger, QC May 24 - September 19 Milan, QCMay 25 - September 15 St Ephrem, QC May 23 - September 16 Lingwick, QCMay 30 - September 14 Notre Dame Des Bois, QC May 20 - September 27

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