Frost Dates for Port Rowan, ON

Based on data from Delhi Cs weather station, 18 miles away

Elevation: 184 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. May 9
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 15
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 14
First Fall Frost October 10

Hard Freeze (−2°C)

Last Spring Hard Freeze April 28
First Fall Hard Freeze October 23
42.62°N, -80.47°W © OpenStreetMap

Growing Season

159 Days May 9 to October 15

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 5b

Avg. annual minimum: −15 to −10°F (−26 to −23°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°
-5°
High: -1°C
Avg: -5°C
Low: -9°C
Jan
-4°
High: 0°C
Avg: -4°C
Low: -9°C
Feb
0°
High: 5°C
Avg: 0°C
Low: -4°C
Mar
7°
High: 13°C
Avg: 7°C
Low: 1°C
Apr
14°
High: 20°C
Avg: 14°C
Low: 7°C
May
19°
High: 25°C
Avg: 19°C
Low: 13°C
Jun
21°
High: 28°C
Avg: 21°C
Low: 15°C
Jul
20°
High: 26°C
Avg: 20°C
Low: 14°C
Aug
17°
High: 23°C
Avg: 17°C
Low: 10°C
Sep
10°
High: 15°C
Avg: 10°C
Low: 5°C
Oct
4°
High: 8°C
Avg: 4°C
Low: 0°C
Nov
-2°
High: 2°C
Avg: -2°C
Low: -5°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
81 mm
81.3 mm
Jan
71 mm
71.1 mm
Feb
71 mm
71.1 mm
Mar
81 mm
81.3 mm
Apr
84 mm
83.8 mm
May
79 mm
78.7 mm
Jun
86 mm
86.4 mm
Jul
81 mm
81.3 mm
Aug
84 mm
83.8 mm
Sep
84 mm
83.8 mm
Oct
69 mm
68.6 mm
Nov
76 mm
76.2 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10.5h11.5h13h14.5h15h15h14h12.5h11h9.5h9h
Jan: 7:56 AM – 5:07 PM · 9h 11m
Feb: 7:27 AM – 5:46 PM · 10h 19m
Mar: 7:42 AM – 7:21 PM · 11h 39m
Apr: 6:47 AM – 7:58 PM · 13h 11m
May: 6:05 AM – 8:32 PM · 14h 27m
Jun: 5:48 AM – 8:57 PM · 15h 09m
Jul: 6:02 AM – 8:54 PM · 14h 52m
Aug: 6:34 AM – 8:19 PM · 13h 45m
Sep: 7:08 AM – 7:25 PM · 12h 16m
Oct: 7:43 AM – 6:31 PM · 10h 48m
Nov: 7:23 AM – 4:52 PM · 9h 30m
Dec: 7:52 AM – 4:44 PM · 8h 51m
Daylight Eastern Time (ET) Longest: 15h 10m · Shortest: 8h 50m

Nearby Stations

Tillsonburg North, ON May 8 - October 11 Foldens, ONMay 2 - October 15 Woodstock, ONMay 8 - October 7 Long Point (Aut), ON April 9 - November 19 Roseville, ONMay 9 - October 9 St Thomas Wpcp, ON May 7 - October 13

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