Frost Dates for Countryside, VA

Based on data from Wfo Sterling 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 13
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 19
First Fall Frost October 20

Hard Freeze (28°F)

Last Spring Hard Freeze March 31
First Fall Hard Freeze November 4
39.04°N, -77.41°W © OpenStreetMap

Growing Season

196 Days April 13 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 7a

Avg. annual minimum: 0 to 5°F (−18 to −15°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°
33°
High: 42°F
Avg: 33°F
Low: 25°F
Jan
36°
High: 45°F
Avg: 36°F
Low: 26°F
Feb
44°
High: 54°F
Avg: 44°F
Low: 33°F
Mar
55°
High: 66°F
Avg: 55°F
Low: 43°F
Apr
64°
High: 74°F
Avg: 64°F
Low: 53°F
May
73°
High: 83°F
Avg: 73°F
Low: 63°F
Jun
77°
High: 87°F
Avg: 77°F
Low: 67°F
Jul
76°
High: 86°F
Avg: 76°F
Low: 66°F
Aug
69°
High: 79°F
Avg: 69°F
Low: 58°F
Sep
57°
High: 68°F
Avg: 57°F
Low: 45°F
Oct
46°
High: 56°F
Avg: 46°F
Low: 35°F
Nov
37°
High: 46°F
Avg: 37°F
Low: 29°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" 6.1"
4.1"
4.13"
Jan
3.4"
3.42"
Feb
4.5"
4.51"
Mar
4.6"
4.60"
Apr
6.1"
6.09"
May
5.8"
5.84"
Jun
4.5"
4.51"
Jul
5.5"
5.45"
Aug
5.4"
5.43"
Sep
6.0"
5.99"
Oct
5.8"
5.83"
Nov
5.6"
5.63"
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: 4:38 AM – 7:22 PM · 14h 43m
Jul: 4:46 AM – 7:14 PM · 14h 29m
Aug: 5:14 AM – 6:46 PM · 13h 32m
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 49m
Dec: 7:22 AM – 4:38 PM · 9h 17m
Daylight Longest: 14h 44m · Shortest: 9h 16m

Nearby Stations

Washington Dc Dulles AP, VA April 15 - October 24 Vienna, VAApril 14 - October 29 Purcellville, VA April 16 - October 25 Manassas, VAApril 12 - October 27 Rockville 1 Ne, MD April 1 - November 6 Dalecarlia Rsvr, MD April 9 - October 31

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