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WeatherLive › Maryland › Potomac

Potomac, MD Weather (20854)

Today Hourly 10-Day Weekend Monthly Radar Air Quality Climate
Current WeatherPotomac · 5:00 AM EDT
30° | 20°
21°C
Feels like 23°
Heavy rain
WindNW 3 mph · Gusts 3 mph
Precip85% · 12.20 in
Humidity93% · Dew point 20°
UV index7 High
Air Quality76 Moderate
Pressure29.97 inHg
Visibility1 mi
Sunrise / Sunset6:34 AM · 7:45 PM · 13h 11m

Weather map — Potomac

Full radar →
Now
21°
0.94 in
1 mph
06:00
20°
0.94 in
1 mph
07:00
20°
0.94 in
2 mph
08:00
21°
0.94 in
2 mph
09:00
23°
0.94 in
2 mph
10:00
24°
0.94 in
4 mph
11:00
28°
0.94 in
4 mph
12:00
28°
0.94 in
5 mph
13:00
29°
12%
5 mph
14:00
30°
11%
4 mph
15:00
30°
11%
3 mph
16:00
30°
10%
2 mph
17:00
29°
12%
2 mph
18:00
28°
13%
4 mph
19:00
27°
15%
0 mph
20:00
25°
30%
6 mph
21:00
23°
29%
4 mph
22:00
23°
29%
2 mph
23:00
23°
28%
3 mph
00:00
23°
58%
1 mph
01:00
23°
28%
4 mph
02:00
22°
51%
5 mph
03:00
21°
49%
4 mph
04:00
21°
43%
5 mph

Today · Fri 8/28

High 30°
85% / 12.20 in

Mostly cloudy. Winds NW at 6 mph.

Overnight · Fri 8/28

Low 20°
— / –

Mostly cloudy.

Tomorrow · Sat 8/29

30° | 20°
57% / 0.05 in

Mostly cloudy. Winds SE at 8 mph.

7-day trend

Potomac · temperature + precipitation

10-day forecast

Updated 5:00 AM

Details & indices

Wind
3 mph NW
Gusts 3 mph
Humidity
93%
Dew point 20°
Pressure
29.97 inHg
Rising
UV index
7 — High
High today
Air Quality
Moderate
AQI 76 · US EPA
Allergy
Low
Mugwort
Visibility
1 mi
Reduced
Allergy — Potomac

🌿 Conditions right now

View all →
Birch
None
Grass
Low
Oak
None
Alder
None
Hazel
None
Mugwort
Low
Ragweed
Low

Sun & moon

Sunrise6:34 AM
Sunset7:45 PM
Length of day13h 11m
Moonrise7:59 PM
Moonset6:55 AM
Moon phase🌕 Full Moon · 100%
Next full moonSep 26 Harvest Moon
Latitude39.0182°N
Longitude-77.2086°E

Water temps nearby

View all →
No beaches within 50 miles
🌤️No rain expected in the next 90 minutes
Now+30+60+90 min
Minute-by-minute precip · HRRR nowcast

Daily planner

computed from today's forecast
Laundry day
Poor
Line-drying weather
Grilling
Fair
Fire up the grill
Running
Poor
Lace up outside
Patio
Fair
Dinner outdoors
Nearby places in {{REGION}}
Baltimore
Light rain
22°
Data sources · Friday, August 28
Where the Potomac forecast comes from
This page blends NOAA/NWS model guidance with global ensembles for the 10-day outlook, air quality and alerts. Data refreshes every hour, current conditions every 15 minutes. Coordinates: 39.0182°N, -77.2086°.
NBM + global weather models
Updated: 5:00 AM
Weather in Potomac
Over the next 10 days Potomac tops out around 38° (Thursday) and dips to 17° on the coolest night (Sunday). About 12.8 in of precipitation is expected in total; the most likely wet day is Sunday (90% chance). Wind is the one to watch: gusts to 25 mph around Thursday. No watches or warnings are active for the area right now. Right now Potomac is running about 49° warmer than Philadelphia. Longer view: variable mid-latitude weather in every season.
Potomac, MD · Elev 361 ft · 39.02°N, 77.21°W · Maryland · Forecast computed for these exact coordinates
Powered by NWS/NOAA guidance, multi-model forecasts and official environmental feeds · NOAA/NWS · EPA AirNow · MET Norway · global models
Updated: 5:00 AM