Williston, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Williston, a community in Caroline County, Maryland.
This Afternoon
85°F
Mostly Sunny
Mostly sunny, with a high near 85. North wind 5 to 10 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Williston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 85°F | Mostly Sunny | 5 to 10 mph N | 10% |
| Tonight | 64°F | Mostly Cloudy | 5 mph N | 4% |
| Saturday | 78°F | Mostly Sunny | 5 to 10 mph NE | 10% |
| Saturday Night | 66°F | Patchy Fog | 5 to 10 mph E | 1% |
| Sunday | 82°F | Patchy Fog then Slight Chance Rain Showers | 5 to 10 mph S | 15% |
| Sunday Night | 67°F | Showers And Thunderstorms Likely | 5 to 10 mph W | 65% |
| Monday | 74°F | Chance Showers And Thunderstorms | 5 to 10 mph N | 47% |
| Monday Night | 63°F | Chance Rain Showers | 5 to 10 mph NE | 43% |
| Tuesday | 70°F | Chance Rain Showers | 10 to 15 mph NE | 48% |
| Tuesday Night | 59°F | Chance Rain Showers | 10 to 15 mph NE | 48% |
| Wednesday | 66°F | Chance Rain Showers | 10 to 15 mph NE | 42% |
| Wednesday Night | 58°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 42% |
| Thursday | 67°F | Chance Showers And Thunderstorms | 10 mph NE | 34% |
| Thursday Night | 56°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 34% |
Forecast source: National Weather Service (api.weather.gov) for Williston (38.830, -75.851). Updated through the day.
Growing snapshot for Williston
Last spring frost
Apr 11
First fall frost
Oct 30
Growing season
200 days
Hardiness zone
7b
More local growing data for Williston: nearby ZIP 21629 weather · frost dates · planting calendar · Maryland frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Greenwood 2Ne, De (13.7 mi from Williston). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.