Frost Dates for Danbury, CT

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 20
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 20
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 14

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze April 7
First Fall Hard Freeze November 1
41.40°N, -73.42°W © OpenStreetMap

Growing Season

183 Days April 20 to October 20

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 6b

Learn more

Temperature

20° 40° 60° 80°
28°
High: 36°
Avg: 28°
Low: 21°
Jan
30°
High: 39°
Avg: 30°
Low: 22°
Feb
38°
High: 48°
Avg: 38°
Low: 29°
Mar
50°
High: 61°
Avg: 50°
Low: 39°
Apr
60°
High: 72°
Avg: 60°
Low: 49°
May
69°
High: 80°
Avg: 69°
Low: 59°
Jun
75°
High: 85°
Avg: 75°
Low: 64°
Jul
72°
High: 82°
Avg: 72°
Low: 63°
Aug
65°
High: 75°
Avg: 65°
Low: 55°
Sep
53°
High: 63°
Avg: 53°
Low: 43°
Oct
42°
High: 50°
Avg: 42°
Low: 34°
Nov
33°
High: 40°
Avg: 33°
Low: 26°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 6" 7.4"
4.7"
4.69"
Jan
4.6"
4.63"
Feb
5.5"
5.45"
Mar
5.0"
4.95"
Apr
5.0"
5.05"
May
5.4"
5.43"
Jun
6.0"
5.97"
Jul
7.4"
7.41"
Aug
6.2"
6.20"
Sep
6.4"
6.39"
Oct
6.1"
6.07"
Nov
6.0"
5.99"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h14h15h15h14h12h11h10h9h
Jan: 7:20 AM – 4:40 PM · 9h 19m
Feb: 6:48 AM – 5:12 PM · 10h 24m
Mar: 6:10 AM – 5:50 PM · 11h 40m
Apr: 5:26 AM – 6:34 PM · 13h 07m
May: 4:50 AM – 7:10 PM · 14h 20m
Jun: 4:31 AM – 7:29 PM · 14h 59m
Jul: 4:39 AM – 7:21 PM · 14h 43m
Aug: 5:10 AM – 6:50 PM · 13h 40m
Sep: 5:52 AM – 6:08 PM · 12h 16m
Oct: 6:34 AM – 5:26 PM · 10h 51m
Nov: 7:11 AM – 4:49 PM · 9h 37m
Dec: 7:29 AM – 4:31 PM · 9h 01m
Daylight Longest: 14h 60m · Shortest: 9h 00m

Nearby Stations

Danbury Muni AP, CT May 1 - October 14 Carmel 4n, NY April 28 - October 16 Ansonia 1 Ne, CT April 25 - October 17 Stormville, NY April 21 - October 25 Stamford 5 N, CT April 17 - October 23 Yorktown Hts 1w, NY April 25 - October 19

Plan Your Garden with Planter

Now that you know your frost dates, use Planter to plan your veggie garden! Planter is an easy drag-and-drop garden planner with personalized planting schedules.

Try Planter For Free

Available everywhere: iOS, Android, web, and more!

Planter app garden planner preview