Frost Dates for Colmar Manor, MD

Based on data from Natl Arboretum Dc weather station, 2 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. March 29
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. November 8
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 3
First Fall Frost November 2

Hard Freeze (28°F)

Last Spring Hard Freeze March 17
First Fall Hard Freeze November 20
38.93°N, -76.95°W © OpenStreetMap

Growing Season

224 Days March 29 to November 8

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 7b

Avg. annual minimum: 5 to 10°F (−15 to −12°C)

Learn more

Köppen Climate iThe Köppen climate classification system categorizes climates based on temperature and precipitation patterns.

Cfa Humid Subtropical

Hot, humid summers and mild winters with rain year-round. Long growing seasons support a wide variety of vegetables, fruits, and ornamentals. The most common climate in the eastern US.

Köppen climate map

Temperature

20° 40° 60° 80°
36°
High: 45°F
Avg: 36°F
Low: 28°F
Jan
39°
High: 48°F
Avg: 39°F
Low: 30°F
Feb
46°
High: 56°F
Avg: 46°F
Low: 37°F
Mar
57°
High: 68°F
Avg: 57°F
Low: 46°F
Apr
67°
High: 77°F
Avg: 67°F
Low: 57°F
May
76°
High: 85°F
Avg: 76°F
Low: 66°F
Jun
80°
High: 90°F
Avg: 80°F
Low: 71°F
Jul
79°
High: 88°F
Avg: 79°F
Low: 69°F
Aug
72°
High: 82°F
Avg: 72°F
Low: 62°F
Sep
59°
High: 70°F
Avg: 59°F
Low: 49°F
Oct
49°
High: 58°F
Avg: 49°F
Low: 39°F
Nov
41°
High: 49°F
Avg: 41°F
Low: 32°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 6" 6.7"
5.7"
5.68"
Jan
4.5"
4.53"
Feb
5.5"
5.53"
Mar
4.8"
4.76"
Apr
5.5"
5.49"
May
6.2"
6.22"
Jun
6.0"
5.99"
Jul
5.9"
5.87"
Aug
5.1"
5.10"
Sep
4.9"
4.88"
Oct
5.1"
5.06"
Nov
6.7"
6.67"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9.5h10.5h11.5h13h14h14.5h14.5h13.5h12h11h10h9.5h
Jan: 7:13 AM – 4:47 PM · 9h 33m
Feb: 6:44 AM – 5:16 PM · 10h 32m
Mar: 6:09 AM – 5:51 PM · 11h 42m
Apr: 5:29 AM – 6:31 PM · 13h 02m
May: 4:56 AM – 7:04 PM · 14h 08m
Jun: 4:39 AM – 7:21 PM · 14h 43m
Jul: 4:46 AM – 7:14 PM · 14h 28m
Aug: 5:14 AM – 6:46 PM · 13h 31m
Sep: 5:53 AM – 6:07 PM · 12h 14m
Oct: 6:31 AM – 5:29 PM · 10h 57m
Nov: 7:05 AM – 4:55 PM · 9h 50m
Dec: 7:22 AM – 4:38 PM · 9h 17m
Daylight Longest: 14h 44m · Shortest: 9h 16m

Nearby Stations

Washington Reagan AP, VA March 24 - November 18 Dalecarlia Rsvr, MD April 9 - October 31 Oxon Hill, MDApril 3 - November 8 Beltsville, MD April 10 - November 1 Glenn Dale Bell Stn, MD April 22 - October 22 Upper Marlboro 3 Nnw, MD April 9 - October 29

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