Frost Dates for Riva, MD

Based on data from Annapolis Police Brks weather station, 5 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 27
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 13
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 March 31
First Fall Frost November 7

Hard Freeze (28°F)

Last Spring Hard Freeze March 14
First Fall Hard Freeze November 28
38.95°N, -76.58°W © OpenStreetMap

Growing Season

231 Days March 27 to November 13

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°
37°
High: 44°F
Avg: 37°F
Low: 29°F
Jan
39°
High: 48°F
Avg: 39°F
Low: 31°F
Feb
47°
High: 55°F
Avg: 47°F
Low: 38°F
Mar
58°
High: 68°F
Avg: 58°F
Low: 48°F
Apr
67°
High: 77°F
Avg: 67°F
Low: 57°F
May
76°
High: 85°F
Avg: 76°F
Low: 67°F
Jun
80°
High: 89°F
Avg: 80°F
Low: 71°F
Jul
78°
High: 86°F
Avg: 78°F
Low: 70°F
Aug
72°
High: 80°F
Avg: 72°F
Low: 65°F
Sep
60°
High: 69°F
Avg: 60°F
Low: 52°F
Oct
49°
High: 58°F
Avg: 49°F
Low: 41°F
Nov
41°
High: 48°F
Avg: 41°F
Low: 34°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" 6.5"
4.5"
4.54"
Jan
4.5"
4.46"
Feb
5.0"
5.00"
Mar
4.0"
3.99"
Apr
5.1"
5.09"
May
5.0"
4.99"
Jun
6.1"
6.09"
Jul
6.5"
6.51"
Aug
5.4"
5.42"
Sep
5.6"
5.61"
Oct
5.5"
5.48"
Nov
5.4"
5.38"
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 16m
Daylight Longest: 14h 44m · Shortest: 9h 16m

Nearby Stations

Annapolis Naf, MD March 23 - November 20 Stevensville 2sw, MD March 29 - November 12 Baltimore Wash Intl AP, MD April 10 - October 31 Glenn Dale Bell Stn, MD April 22 - October 22 Upper Marlboro 3 Nnw, MD April 9 - October 29 Md Sci Ctr Baltimore, MD March 24 - November 21

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