Frost Dates for Calais, ME

Based on data from Woodland weather station, 6 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 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. October 26
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 April 26
First Fall Frost October 18

Hard Freeze (28°F)

Last Spring Hard Freeze April 10
First Fall Hard Freeze November 7
45.18°N, -67.28°W © OpenStreetMap

Growing Season

188 Days April 21 to October 26

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° 30° 50° 70°
21°
High: 28°F
Avg: 21°F
Low: 13°F
Jan
23°
High: 31°F
Avg: 23°F
Low: 14°F
Feb
32°
High: 39°F
Avg: 32°F
Low: 24°F
Mar
44°
High: 52°F
Avg: 44°F
Low: 36°F
Apr
55°
High: 64°F
Avg: 55°F
Low: 46°F
May
65°
High: 74°F
Avg: 65°F
Low: 56°F
Jun
71°
High: 80°F
Avg: 71°F
Low: 62°F
Jul
70°
High: 79°F
Avg: 70°F
Low: 61°F
Aug
61°
High: 71°F
Avg: 61°F
Low: 52°F
Sep
50°
High: 58°F
Avg: 50°F
Low: 42°F
Oct
39°
High: 46°F
Avg: 39°F
Low: 33°F
Nov
28°
High: 35°F
Avg: 28°F
Low: 22°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 3" 6" 8.2"
6.2"
6.22"
Jan
5.8"
5.79"
Feb
6.7"
6.65"
Mar
6.2"
6.16"
Apr
5.4"
5.43"
May
4.8"
4.79"
Jun
4.7"
4.65"
Jul
4.7"
4.66"
Aug
5.5"
5.47"
Sep
8.2"
8.20"
Oct
6.8"
6.75"
Nov
6.8"
6.77"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h11.5h13.5h14.5h15.5h15h14h12.5h10.5h9.5h8.5h
Jan: 7:32 AM – 4:28 PM · 8h 56m
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 25m
Jul: 4:27 AM – 7:33 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 17m
Dec: 7:43 AM – 4:17 PM · 8h 34m
Daylight Longest: 15h 27m · Shortest: 8h 33m

Nearby Stations

Robbinston, MEMay 5 - October 13 Grand Lake Stream, ME May 4 - October 10 Wesley, MEMay 2 - October 15 Topsfield 2, MEMay 6 - October 8 Eastport, MEApril 29 - October 25 Vanceboro No 2, ME May 13 - October 1

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