Olney, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Olney, a community in Montgomery County, Maryland.
This Afternoon
77°F
Partly Sunny
Partly sunny, with a high near 77. East wind around 8 mph.
7-day forecast for Olney
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 77°F | Partly Sunny | 8 mph E | 4% |
| Tonight | 65°F | Mostly Cloudy | 9 mph SE | 10% |
| Sunday | 82°F | Chance Showers And Thunderstorms | 8 to 13 mph S | 70% |
| Sunday Night | 60°F | Chance Showers And Thunderstorms | 3 to 9 mph NW | 70% |
| Monday | 71°F | Chance Rain Showers | 12 mph NE | 32% |
| Monday Night | 57°F | Chance Rain Showers | 10 mph NE | 48% |
| Tuesday | 65°F | Showers And Thunderstorms Likely | 9 to 14 mph NE | 59% |
| Tuesday Night | 53°F | Showers And Thunderstorms Likely | 13 mph NE | 59% |
| Wednesday | 61°F | Chance Rain Showers | 14 mph NE | 49% |
| Wednesday Night | 53°F | Chance Rain Showers | 10 to 14 mph NE | 33% |
| Thursday | 61°F | Chance Rain Showers | 10 to 14 mph NE | 27% |
| Thursday Night | 51°F | Chance Rain Showers | 7 to 10 mph N | 26% |
| Friday | 65°F | Slight Chance Rain Showers | 12 mph N | 24% |
| Friday Night | 51°F | Slight Chance Rain Showers | 7 to 10 mph N | 20% |
Forecast source: National Weather Service (api.weather.gov) for Olney (39.144, -77.071). Updated through the day.
Growing snapshot for Olney
Last spring frost
Apr 1
First fall frost
Nov 6
Growing season
219 days
Hardiness zone
7b
More local growing data for Olney: nearby ZIP 20832 weather · frost dates · planting calendar · Maryland frost dates
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Climate data from the nearest NOAA station, Rockville 1 Ne, Md (5.1 mi from Olney). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.