Weather for 21057 — Glen Arm, MD
Conditions and forecast for the exact centre of ZIP code 21057 (39.458, -76.515), not a nearby airport.
64°
Light rain
- Feels like:
- 64°
- Humidity:
- 96%
- Wind:
- 10 mph
- Dew point:
- 63°
Source updated: 1:47:21 PM · WeatherSignal checked: 1:47:21 PM
Next 12 hours in 21057
2 PM
66°
0%
3 PM
69°
0%
4 PM
73°
0%
5 PM
76°
0%
6 PM
78°
0%
7 PM
79°
0%
8 PM
78°
0%
9 PM
77°
0%
10 PM
69°
0%
11 PM
64°
0%
12 AM
64°
0%
1 AM
64°
0%
7 day forecast for 21057
Today
79° / 64°
0% rain · 15 mph wind
Saturday, Oct 17
64° / 48°
0% rain · 16 mph wind
Sunday, Oct 18
57° / 40°
0% rain · 14 mph wind
Monday, Oct 19
55° / 42°
0% rain · 11 mph wind
Tuesday, Oct 20
66° / 49°
0% rain · 13 mph wind
Wednesday, Oct 21
63° / 53°
0% rain · 15 mph wind
Thursday, Oct 22
60° / 52°
0% rain · 12 mph wind
About ZIP code 21057
21057 covers Glen Arm 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: Baltimore (13 mi), Washington (47 mi), Alexandria (53 mi), Philadelphia (79 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 Glen Arm 21057, Maryland
- The warmest afternoon ahead is today, reaching about 79°F.
- The coldest night ahead dips to about 40°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 16 mph.
Common questions about Glen Arm 21057, Maryland weather
- How accurate is the Glen Arm 21057, 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 Glen Arm 21057, 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 Glen Arm 21057, Maryland
- Current weather in Glen Arm 21057, Maryland
- Glen Arm 21057, Maryland hourly forecast
- Glen Arm 21057, Maryland weather tomorrow
- Glen Arm 21057, Maryland weekend weather
- Glen Arm 21057, Maryland weather radar
- Glen Arm 21057, Maryland severe weather alerts
- Best time to go outside in Glen Arm 21057, Maryland
- What happened overnight in Glen Arm 21057, Maryland
- How accurate is the Glen Arm 21057, Maryland forecast?
- Glen Arm 21057, Maryland monthly weather averages
Weather in nearby cities
- Baltimore, MD weather · about 13 miles away
- Washington, DC weather · about 47 miles away
- Alexandria, VA weather · about 53 miles away
- Philadelphia, PA weather · about 79 miles away
- Allentown, PA weather · about 96 miles away
- Richmond, VA weather · about 141 miles away