Frost Dates for Saint John A, Canada

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 21
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 23
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 27
First Fall Frost September 15

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 6
First Fall Hard Freeze October 17
45.32°N, -65.88°W © OpenStreetMap

Growing Season

125 Days May 21 to September 23

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

Learn more

Temperature

0° 20° 40° 60° 80°
17°
High: 27°
Avg: 17°
Low: 8°
Jan
20°
High: 29°
Avg: 20°
Low: 10°
Feb
28°
High: 37°
Avg: 28°
Low: 19°
Mar
39°
High: 48°
Avg: 39°
Low: 29°
Apr
49°
High: 59°
Avg: 49°
Low: 39°
May
58°
High: 68°
Avg: 58°
Low: 47°
Jun
63°
High: 73°
Avg: 63°
Low: 53°
Jul
62°
High: 73°
Avg: 62°
Low: 52°
Aug
56°
High: 66°
Avg: 56°
Low: 46°
Sep
46°
High: 55°
Avg: 46°
Low: 37°
Oct
37°
High: 45°
Avg: 37°
Low: 29°
Nov
25°
High: 34°
Avg: 25°
Low: 17°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 5.4"
4.3"
4.30"
Jan
4.0"
4.00"
Feb
4.6"
4.60"
Mar
3.8"
3.80"
Apr
3.7"
3.70"
May
2.7"
2.70"
Jun
3.7"
3.70"
Jul
2.8"
2.80"
Aug
4.3"
4.30"
Sep
5.4"
5.40"
Oct
5.2"
5.20"
Nov
4.8"
4.80"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h15h15h15h14h12h11h9h9h
Jan: 7:33 AM – 4:27 PM · 8h 55m
Feb: 6:55 AM – 5:05 PM · 10h 09m
Mar: 6:11 AM – 5:49 PM · 11h 37m
Apr: 5:21 AM – 6:39 PM · 13h 17m
May: 4:40 AM – 7:20 PM · 14h 41m
Jun: 4:17 AM – 7:43 PM · 15h 27m
Jul: 4:26 AM – 7:34 PM · 15h 08m
Aug: 5:03 AM – 6:57 PM · 13h 55m
Sep: 5:51 AM – 6:09 PM · 12h 18m
Oct: 6:39 AM – 5:21 PM · 10h 41m
Nov: 7:22 AM – 4:38 PM · 9h 16m
Dec: 7:43 AM – 4:17 PM · 8h 33m
Daylight Longest: 15h 28m · Shortest: 8h 32m

Nearby Stations

Point Lepreau Cs, Canada May 5 - October 16 Gagetown 2, Canada May 7 - October 8 Gagetown Awos A, Canada May 20 - September 26 Fundy Park (Alma) Cs, Canada May 8 - October 14 Fredericton A, Canada May 14 - September 27 Acadia Forest Exp St, Canada May 31 - September 12

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