Frost Dates for Merrimac, VA

Based on data from Blacksburg Nwso weather station, 1 miles away

Elevation: 1985 ft

Frost Dates

Last Spring Frost (50%) A 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. April 24
First Fall Frost (50%) A 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. October 19

30% Probability

Only 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 1
First Fall Frost October 14

Hard Freeze (28°F)

Last Spring Hard Freeze April 11
First Fall Hard Freeze October 29
37.19°N, 80.43°W © OpenStreetMap

Growing Season

178 Days April 24 to October 19

USDA Hardiness Zone

Hardiness 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

Learn more

Köppen Climate

The 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

Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)
Temperature table
Average monthly temperatures (°F)
Month Avg High Avg Temp Avg Low
January42°32°22°
February45°35°24°
March53°42°30°
April64°51°39°
May72°60°48°
June79°68°57°
July82°72°61°
August81°70°60°
September76°64°53°
October66°53°41°
November55°43°31°
December45°35°25°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January4.1
February4.3
March5.3
April4.9
May5.4
June4.6
July4.5
August4.2
September3.9
October4.8
November4.4
December4.1

Sunrise / Sunset

Daylight Eastern Time (ET) Longest: 14h 34m · Shortest: 9h 26m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Eastern Time (ET))
Month Sunrise Sunset Daylight
January7:40 AM5:22 PM9h 42m
February7:18 AM5:55 PM10h 37m
March7:40 AM7:23 PM11h 43m
April6:53 AM7:51 PM12h 58m
May6:18 AM8:18 PM13h 60m
June6:05 AM8:38 PM14h 33m
July6:18 AM8:37 PM14h 19m
August6:43 AM8:09 PM13h 26m
September7:09 AM7:23 PM12h 13m
October7:36 AM6:37 PM11h 01m
November7:08 AM5:06 PM9h 58m
December7:34 AM5:01 PM9h 27m

Nearby Stations

Christiansburg, VA April 19 - October 23 Radford 3 N, VA April 26 - October 18 Pearisburg 4 Sse, VA April 27 - October 17 Copper Hill, VA April 21 - October 25 Floyd 2 Ne, VA April 30 - October 10 Pulaski 2 E, VA April 25 - October 17

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