Frost Dates for St. Thomas, Canada

Based on data from St Thomas Wpcp weather station, 1 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. May 7
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 13
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 13
First Fall Frost October 7

Hard Freeze (−2°C)

Last Spring Hard Freeze April 19
First Fall Hard Freeze October 31
42.77°N, -81.18°W © OpenStreetMap

Growing Season

159 Days May 7 to October 13

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: −10 to −5°F (−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° 30°
-4°
High: -1°C
Avg: -4°C
Low: -8°C
Jan
-3°
High: 1°C
Avg: -3°C
Low: -8°C
Feb
1°
High: 5°C
Avg: 1°C
Low: -4°C
Mar
7°
High: 13°C
Avg: 7°C
Low: 2°C
Apr
14°
High: 20°C
Avg: 14°C
Low: 8°C
May
19°
High: 25°C
Avg: 19°C
Low: 13°C
Jun
21°
High: 27°C
Avg: 21°C
Low: 16°C
Jul
21°
High: 26°C
Avg: 21°C
Low: 15°C
Aug
17°
High: 22°C
Avg: 17°C
Low: 11°C
Sep
11°
High: 15°C
Avg: 11°C
Low: 5°C
Oct
4°
High: 8°C
Avg: 4°C
Low: 1°C
Nov
-1°
High: 3°C
Avg: -1°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
79 mm
78.7 mm
Jan
64 mm
63.5 mm
Feb
69 mm
68.6 mm
Mar
89 mm
88.9 mm
Apr
81 mm
81.3 mm
May
79 mm
78.7 mm
Jun
76 mm
76.2 mm
Jul
61 mm
61.0 mm
Aug
97 mm
96.5 mm
Sep
94 mm
94.0 mm
Oct
84 mm
83.8 mm
Nov
71 mm
71.1 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10.5h11.5h13h14.5h15h15h13.5h12.5h11h9.5h9h
Jan: 7:24 AM – 4:36 PM · 9h 11m
Feb: 6:50 AM – 5:10 PM · 10h 19m
Mar: 6:10 AM – 5:50 PM · 11h 39m
Apr: 5:25 AM – 6:35 PM · 13h 11m
May: 4:47 AM – 7:13 PM · 14h 27m
Jun: 4:26 AM – 7:34 PM · 15h 08m
Jul: 4:34 AM – 7:26 PM · 14h 51m
Aug: 5:08 AM – 6:52 PM · 13h 45m
Sep: 5:52 AM – 6:08 PM · 12h 16m
Oct: 6:36 AM – 5:24 PM · 10h 48m
Nov: 7:15 AM – 4:45 PM · 9h 30m
Dec: 7:34 AM – 4:26 PM · 8h 52m
Daylight Longest: 15h 09m · Shortest: 8h 51m

Nearby Stations

Tillsonburg North, Canada May 8 - October 11 Strathroy-Mullifarry, Canada May 9 - October 14 Foldens, CanadaMay 2 - October 15 New Glasgow, Canada May 4 - October 16 Woodstock, Canada May 8 - October 7 Delhi Cs, Canada May 9 - October 15

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