Frost Dates for Beauharnois, Canada

Based on data from Ste Martine weather station, 7 miles away

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 6
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 September 30

Hard Freeze (−2°C)

Last Spring Hard Freeze April 15
First Fall Hard Freeze October 18
45.31°N, -73.87°W © OpenStreetMap

Growing Season

159 Days April 30 to October 6

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 5a

Avg. annual minimum: −20 to −15°F (−29 to −26°C)

Learn more

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

Dfa Hot-Summer Continental

Hot summers and cold winters with year-round precipitation. Moderate growing season supports warm-season crops like tomatoes, peppers, and corn. Winter protection extends the harvest.

Köppen climate map

Temperature

-15° 0° 15° 30°
-9°
High: -5°C
Avg: -9°C
Low: -14°C
Jan
-8°
High: -3°C
Avg: -8°C
Low: -13°C
Feb
-2°
High: 3°C
Avg: -2°C
Low: -6°C
Mar
6°
High: 11°C
Avg: 6°C
Low: 1°C
Apr
14°
High: 19°C
Avg: 14°C
Low: 8°C
May
19°
High: 25°C
Avg: 19°C
Low: 14°C
Jun
21°
High: 27°C
Avg: 21°C
Low: 16°C
Jul
20°
High: 26°C
Avg: 20°C
Low: 15°C
Aug
16°
High: 21°C
Avg: 16°C
Low: 10°C
Sep
9°
High: 14°C
Avg: 9°C
Low: 5°C
Oct
2°
High: 6°C
Avg: 2°C
Low: -1°C
Nov
-4°
High: -1°C
Avg: -4°C
Low: -8°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
81 mm
81.3 mm
Jan
58 mm
58.4 mm
Feb
56 mm
55.9 mm
Mar
79 mm
78.7 mm
Apr
102 mm
101.6 mm
May
97 mm
96.5 mm
Jun
97 mm
96.5 mm
Jul
89 mm
88.9 mm
Aug
94 mm
94.0 mm
Sep
107 mm
106.7 mm
Oct
81 mm
81.3 mm
Nov
84 mm
83.8 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h11.5h13.5h14.5h15.5h15h14h12.5h10.5h9.5h8.5h
Jan: 7:32 AM – 4:28 PM · 8h 55m
Feb: 6:55 AM – 5:05 PM · 10h 10m
Mar: 6:11 AM – 5:49 PM · 11h 37m
Apr: 5:22 AM – 6:38 PM · 13h 17m
May: 4:40 AM – 7:20 PM · 14h 40m
Jun: 4:17 AM – 7:43 PM · 15h 26m
Jul: 4:26 AM – 7:34 PM · 15h 07m
Aug: 5:03 AM – 6:57 PM · 13h 54m
Sep: 5:51 AM – 6:09 PM · 12h 18m
Oct: 6:39 AM – 5:21 PM · 10h 42m
Nov: 7:22 AM – 4:38 PM · 9h 16m
Dec: 7:43 AM – 4:17 PM · 8h 34m
Daylight Longest: 15h 27m · Shortest: 8h 33m

Nearby Stations

Ste-Clothilde, QC May 9 - October 1 Les Cedres, QCMay 2 - October 10 Ormstown, QCMay 6 - October 6 Hemmingford Four Winds, QC May 15 - September 27 Valleyfield, QC April 29 - October 9 Ste-Anne-De-Bellevue 1, QC April 26 - October 16

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