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Weather for 20830 — Olney, MD

Conditions and forecast for the exact centre of ZIP code 20830 (39.155, -77.067), not a nearby airport.

61°

Overcast

Feels like:
61°
Humidity:
98%
Wind:
11 mph
Dew point:
61°

Source updated: 11:50:48 AM · WeatherSignal checked: 11:50:48 AM

Source: Open-Meteo (national weather-service models)

Next 12 hours in 20830

12 PM

62°

0%

1 PM

64°

0%

2 PM

66°

0%

3 PM

72°

0%

4 PM

75°

0%

5 PM

78°

0%

6 PM

80°

0%

7 PM

80°

0%

8 PM

80°

0%

9 PM

79°

0%

10 PM

68°

0%

11 PM

66°

0%

7 day forecast for 20830

  • Today

    80° / 61°

    0% rain · 16 mph wind

  • Saturday, Oct 17

    64° / 49°

    0% rain · 17 mph wind

  • Sunday, Oct 18

    56° / 39°

    0% rain · 14 mph wind

  • Monday, Oct 19

    55° / 42°

    0% rain · 12 mph wind

  • Tuesday, Oct 20

    66° / 48°

    0% rain · 13 mph wind

  • Wednesday, Oct 21

    64° / 53°

    0% rain · 15 mph wind

  • Thursday, Oct 22

    60° / 52°

    0% rain · 12 mph wind

About ZIP code 20830

20830 covers Olney in Maryland. Forecasts on this page are generated for the coordinates at the centre of the ZIP code, so small differences from a nearby city forecast are expected and usually correct.

Closest cities with full forecast pages: Washington (17 mi), Alexandria (24 mi), Baltimore (26 mi), Richmond (113 mi).

Nearby ZIP codes

Severe weather warnings are issued by the National Weather Service for counties and polygons that may not line up with ZIP code boundaries. Always follow official warnings for your exact address.

Planning your week in Olney 20830, Maryland

  • The warmest afternoon ahead is today, reaching about 80°F.
  • The coldest night ahead dips to about 39°F.
  • This is a dry stretch — most days show rain chances under 20%, good for outdoor plans.
  • The breeziest day looks like tomorrow, with sustained wind near 17 mph.

Common questions about Olney 20830, Maryland weather

How accurate is the Olney 20830, Maryland forecast?
The next 48 hours are usually reliable on temperature and sky cover, with timing that can shift by an hour or two. Days three and four are dependable for the overall pattern. Beyond that, treat the numbers as a planning direction rather than a promise — we label confidence on every day so you can judge for yourself.
What is the best day this week in Olney 20830, Maryland?
No day in the current outlook has a rain chance above 40%, so conditions look favorable for outdoor plans across the week.
Where does this forecast come from?
Forecast values come from national weather model data, and official warnings come from the National Weather Service. We show the source and the last-updated time on every page, and we never invent a number the source did not publish — missing measurements are hidden, not guessed.
How often is this page updated?
The forecast refreshes whenever the source model publishes new data, typically several times a day. The freshness note near the top of the page shows exactly when the numbers you are looking at were issued.

More weather for Olney 20830, Maryland

Weather in nearby cities

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