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Current weather in Potomac is overcast clouds.

Where can I find the hourly weather forecast for Potomac?

This page shows hourly weather forecast for Potomac, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for Potomac updated regularly?

Weather data for Potomac is updated regularly with the latest available observations and forecasts.

Now · 4:12 PM

Potomac Weather & Hourly Forecast

United States · Maryland · 20854

63°F

Overcast

Feels like: 59°F

💧 Humidity 69% 🌡 Pressure 30.33 inHg 💨 Wind 9 mph 👁 Visibility 21.4 mi ☁ Clouds 100% ☀️ UV index 1.4 · Low 🌅 Sunrise 6:56 AM 🌇 Sunset 7:05 PM

Hourly Forecast for Potomac

Today

5:00 PM

Overcast

64° 💧 None 💨 8 mph H 66%30.33 inHg

8:00 PM

Partly cloudy night

62° 💧 None 💨 8 mph H 68%30.36 inHg

11:00 PM

Mostly cloudy night

58° 💧 None 💨 9 mph H 69%30.39 inHg

Tomorrow

2:00 AM

Partly cloudy night

55° 💧 None 💨 9 mph H 74%30.36 inHg

5:00 AM

Partly cloudy night

52° 💧 None 💨 9 mph H 80%30.36 inHg

8:00 AM

Partly cloudy

53° 💧 None 💨 10 mph H 73%30.36 inHg

11:00 AM

Overcast

59° 💧 0.001 in 💨 12 mph H 67%30.36 inHg

2:00 PM

Overcast

62° 💧 0.001 in 💨 9 mph H 65%30.30 inHg

5:00 PM

Overcast

64° 💧 None 💨 9 mph H 56%30.27 inHg

8:00 PM

Overcast night

56° 💧 None 💨 5 mph H 76%30.24 inHg

11:00 PM

Overcast night

55° 💧 None 💨 6 mph H 77%30.24 inHg

Friday

2:00 AM

Overcast night

53° 💧 None 💨 8 mph H 83%30.18 inHg

5:00 AM

Partly cloudy night

52° 💧 None 💨 8 mph H 77%30.15 inHg

8:00 AM

Overcast

53° 💧 None 💨 9 mph H 73%30.15 inHg

11:00 AM

Mostly cloudy

61° 💧 None 💨 11 mph H 56%30.12 inHg

2:00 PM

Mostly sunny

68° 💧 None 💨 11 mph H 46%30.06 inHg

Today

5:00 PM

Overcast

64° 💧 None 💨 8 mph H 66%30.33 inHg

6:00 PM

Overcast

64° 💧 None 💨 9 mph H 66%30.33 inHg

7:00 PM

Mostly cloudy

63° 💧 None 💨 8 mph H 67%30.33 inHg

8:00 PM

Partly cloudy night

62° 💧 None 💨 8 mph H 68%30.36 inHg

9:00 PM

Clear night

61° 💧 None 💨 11 mph H 66%30.36 inHg

10:00 PM

Clear night

59° 💧 None 💨 10 mph H 67%30.39 inHg

11:00 PM

Mostly cloudy night

58° 💧 None 💨 9 mph H 69%30.39 inHg

Tomorrow

12:00 AM

Overcast night

57° 💧 None 💨 9 mph H 71%30.39 inHg

1:00 AM

Overcast night

56° 💧 None 💨 8 mph H 73%30.36 inHg

2:00 AM

Partly cloudy night

55° 💧 None 💨 9 mph H 74%30.36 inHg

3:00 AM

Partly cloudy night

54° 💧 None 💨 9 mph H 76%30.36 inHg

4:00 AM

Mostly clear night

53° 💧 None 💨 9 mph H 79%30.36 inHg

5:00 AM

Partly cloudy night

52° 💧 None 💨 9 mph H 80%30.36 inHg

6:00 AM

Overcast night

52° 💧 None 💨 9 mph H 78%30.33 inHg

7:00 AM

Overcast

52° 💧 None 💨 10 mph H 75%30.36 inHg

8:00 AM

Partly cloudy

53° 💧 None 💨 10 mph H 73%30.36 inHg

9:00 AM

Mostly cloudy

55° 💧 None 💨 10 mph H 70%30.36 inHg

10:00 AM

Overcast

57° 💧 None 💨 11 mph H 68%30.36 inHg

11:00 AM

Overcast

59° 💧 None 💨 12 mph H 67%30.36 inHg

12:00 PM

Overcast

61° 💧 None 💨 11 mph H 65%30.36 inHg

1:00 PM

Overcast

62° 💧 0.001 in 💨 11 mph H 63%30.33 inHg

2:00 PM

Overcast

62° 💧 0.001 in 💨 9 mph H 65%30.30 inHg

3:00 PM

Overcast

63° 💧 0.001 in 💨 10 mph H 61%30.30 inHg

4:00 PM

Overcast

64° 💧 None 💨 9 mph H 57%30.27 inHg

5:00 PM

Overcast

64° 💧 None 💨 9 mph H 56%30.27 inHg

6:00 PM

Overcast

62° 💧 None 💨 6 mph H 60%30.27 inHg

7:00 PM

Mostly cloudy

60° 💧 None 💨 5 mph H 66%30.24 inHg

8:00 PM

Overcast night

56° 💧 None 💨 5 mph H 76%30.24 inHg

9:00 PM

Overcast night

56° 💧 None 💨 5 mph H 77%30.24 inHg

10:00 PM

Overcast night

55° 💧 None 💨 6 mph H 79%30.27 inHg

11:00 PM

Overcast night

55° 💧 None 💨 6 mph H 77%30.24 inHg

Friday

12:00 AM

Mostly cloudy night

55° 💧 None 💨 7 mph H 77%30.21 inHg

1:00 AM

Overcast night

53° 💧 None 💨 7 mph H 81%30.21 inHg

2:00 AM

Overcast night

53° 💧 None 💨 8 mph H 83%30.18 inHg

3:00 AM

Mostly cloudy night

53° 💧 None 💨 7 mph H 80%30.18 inHg

4:00 AM

Partly cloudy night

52° 💧 None 💨 8 mph H 80%30.15 inHg

5:00 AM

Partly cloudy night

52° 💧 None 💨 8 mph H 77%30.15 inHg

6:00 AM

Partly cloudy night

51° 💧 None 💨 8 mph H 76%30.15 inHg

7:00 AM

Partly cloudy

50° 💧 None 💨 8 mph H 77%30.15 inHg

8:00 AM

Overcast

53° 💧 None 💨 9 mph H 73%30.15 inHg

9:00 AM

Overcast

55° 💧 None 💨 8 mph H 71%30.15 inHg

10:00 AM

Mostly cloudy

58° 💧 None 💨 10 mph H 65%30.15 inHg

11:00 AM

Mostly cloudy

61° 💧 None 💨 11 mph H 56%30.12 inHg

12:00 PM

Partly cloudy

64° 💧 None 💨 12 mph H 51%30.12 inHg

1:00 PM

Mostly sunny

66° 💧 None 💨 11 mph H 47%30.09 inHg

2:00 PM

Mostly sunny

68° 💧 None 💨 11 mph H 46%30.06 inHg

3:00 PM

Mostly sunny

69° 💧 None 💨 11 mph H 45%30.03 inHg

4:00 PM

Sunny

70° 💧 None 💨 11 mph H 45%30.03 inHg

5:00 PM

Mostly cloudy

69° 💧 None 💨 11 mph H 47%30.03 inHg

6:00 PM

Mostly cloudy

68° 💧 None 💨 9 mph H 55%30.03 inHg

7:00 PM

Mostly cloudy

65° 💧 None 💨 8 mph H 62%30.03 inHg

8:00 PM

Partly cloudy night

63° 💧 None 💨 9 mph H 64%30.00 inHg

9:00 PM

Mostly clear night

63° 💧 None 💨 9 mph H 64%30.03 inHg

10:00 PM

Partly cloudy night

61° 💧 None 💨 9 mph H 66%30.03 inHg

11:00 PM

Partly cloudy night

61° 💧 None 💨 9 mph H 69%30.00 inHg

Saturday

12:00 AM

Mostly clear night

60° 💧 None 💨 9 mph H 71%30.00 inHg

1:00 AM

Mostly clear night

59° 💧 None 💨 10 mph H 73%29.97 inHg

2:00 AM

Mostly clear night

58° 💧 None 💨 11 mph H 72%29.97 inHg

3:00 AM

Partly cloudy night

59° 💧 None 💨 11 mph H 70%29.94 inHg

4:00 AM

Overcast night

59° 💧 None 💨 10 mph H 70%29.94 inHg

5:00 AM

Overcast night

59° 💧 None 💨 11 mph H 71%29.91 inHg

6:00 AM

Mostly cloudy night

59° 💧 None 💨 12 mph H 69%29.91 inHg

7:00 AM

Overcast

60° 💧 None 💨 13 mph H 67%29.91 inHg

8:00 AM

Overcast

61° 💧 None 💨 13 mph H 63%29.91 inHg

11:00 AM

Overcast

65° 💧 None 💨 13 mph H 58%29.91 inHg

2:00 PM

Light rain

58° 💧 None 💨 14 mph H 89%29.88 inHg

5:00 PM

Light rain

61° 💧 None 💨 14 mph H 71%29.85 inHg

8:00 PM

Overcast night

61° 💧 None 💨 13 mph H 66%29.85 inHg

11:00 PM

Light rain

59° 💧 None 💨 11 mph H 71%29.85 inHg

Sunday

2:00 AM

Overcast night

58° 💧 None 💨 10 mph H 77%29.83 inHg

5:00 AM

Overcast night

60° 💧 None 💨 10 mph H 71%29.77 inHg

8:00 AM

Mostly sunny

59° 💧 None 💨 10 mph H 70%29.77 inHg

11:00 AM

Partly cloudy

66° 💧 None 💨 13 mph H 60%29.77 inHg

2:00 PM

Overcast

72° 💧 None 💨 13 mph H 56%29.74 inHg

5:00 PM

Light rain

64° 💧 None 💨 10 mph H 82%29.77 inHg

8:00 PM

Overcast night

62° 💧 None 💨 7 mph H 94%29.77 inHg

11:00 PM

Overcast night

62° 💧 None 💨 8 mph H 86%29.80 inHg

Monday

2:00 AM

Overcast night

60° 💧 None 💨 7 mph H 85%29.80 inHg

5:00 AM

Overcast night

60° 💧 None 💨 7 mph H 84%29.83 inHg

8:00 AM

Overcast

61° 💧 None 💨 7 mph H 83%29.85 inHg

11:00 AM

Overcast

65° 💧 None 💨 9 mph H 71%29.88 inHg

2:00 PM

Overcast

69° 💧 None 💨 9 mph H 63%29.85 inHg

5:00 PM

Partly cloudy

70° 💧 None 💨 6 mph H 61%29.85 inHg

8:00 PM

Clear night

64° 💧 None 💨 4 mph H 79%29.91 inHg

11:00 PM

Clear night

61° 💧 None 💨 4 mph H 87%29.94 inHg

Tuesday

2:00 AM

Mostly cloudy night

59° 💧 None 💨 3 mph H 92%29.94 inHg

5:00 AM

Overcast night

60° 💧 None 💨 3 mph H 88%29.94 inHg

8:00 AM

Mostly cloudy

61° 💧 None 💨 4 mph H 87%29.97 inHg

2:00 PM

Overcast

72° 💧 None 💨 5 mph H 59%29.97 inHg

8:00 PM

Mostly clear night

66° 💧 None 💨 1 mph H 80%29.97 inHg

Wednesday

2:00 AM

Mostly clear night

61° 💧 None 💨 0 mph H 91%30.00 inHg

8:00 AM

Partly cloudy

60° 💧 None 💨 3 mph H 92%30.06 inHg

2:00 PM

Sunny

78° 💧 None 💨 4 mph H 54%30.03 inHg

8:00 PM

Mostly clear night

69° 💧 None 💨 7 mph H 78%30.00 inHg

Thursday

2:00 AM

Clear night

64° 💧 None 💨 4 mph H 93%30.00 inHg

8:00 AM

Sunny

66° 💧 None 💨 7 mph H 95%30.00 inHg

2:00 PM

Mostly sunny

83° 💧 None 💨 12 mph H 62%29.91 inHg

8:00 PM

Clear night

78° 💧 None 💨 12 mph H 72%29.83 inHg

Friday

2:00 AM

Mostly clear night

75° 💧 None 💨 12 mph H 77%29.80 inHg

8:00 AM

Light rain

70° 💧 None 💨 9 mph H 97%29.83 inHg

2:00 PM

Mostly sunny

81° 💧 None 💨 8 mph H 55%29.83 inHg

8:00 PM

Clear night

71° 💧 None 💨 6 mph H 66%29.88 inHg

Saturday

2:00 AM

Clear night

63° 💧 None 💨 7 mph H 81%29.94 inHg

8:00 AM

Sunny

59° 💧 None 💨 5 mph H 89%30.00 inHg

2:00 PM

Partly cloudy

74° 💧 None 💨 4 mph H 50%29.97 inHg

8:00 PM

Mostly cloudy night

66° 💧 None 💨 2 mph H 70%30.00 inHg

Sunday

2:00 AM

Mostly cloudy night

61° 💧 None 💨 3 mph H 89%30.03 inHg

8:00 AM

Sunny

60° 💧 None 💨 5 mph H 96%30.03 inHg

2:00 PM

Mostly cloudy

73° 💧 None 💨 10 mph H 60%29.97 inHg

8:00 PM

Overcast night

67° 💧 None 💨 12 mph H 83%29.94 inHg

Monday

2:00 AM

Moderate rain

63° 💧 None 💨 8 mph H 99%29.83 inHg

8:00 AM

Moderate rain

64° 💧 None 💨 6 mph H 99%29.80 inHg

2:00 PM

Sunny

69° 💧 None 💨 14 mph H 47%29.85 inHg

8:00 PM

Clear night

61° 💧 None 💨 10 mph H 57%29.94 inHg

Tuesday

2:00 AM

Clear night

54° 💧 None 💨 7 mph H 73%30.03 inHg

8:00 AM

Partly cloudy

52° 💧 None 💨 5 mph H 76%30.12 inHg

2:00 PM

Sunny

67° 💧 None 💨 6 mph H 49%30.09 inHg

8:00 PM

Mostly cloudy night

61° 💧 None 💨 2 mph H 70%30.06 inHg

Wednesday

2:00 AM

Mostly clear night

54° 💧 None 💨 3 mph H 86%30.03 inHg

8:00 AM

Mostly cloudy

54° 💧 None 💨 2 mph H 88%30.03 inHg

2:00 PM

Overcast

72° 💧 None 💨 6 mph H 48%29.94 inHg

8:00 PM

Clear night

64° 💧 None 💨 6 mph H 70%29.85 inHg

Thursday

2:00 AM

Clear night

57° 💧 None 💨 5 mph H 84%29.80 inHg

8:00 AM

Sunny

56° 💧 None 💨 4 mph H 88%29.77 inHg

In Potomac and, more broadly, across the state of Maryland: The morning will start with mostly cloudy skies and mild temperatures around 65 to 74 degrees Fahrenheit. Light northeast winds are expected, reaching up to 9 mph with gusts up to 17 mph. As the day progresses, there's a high likelihood of rain, with an expected accumulation of about 0.18 inches. The rain could develop at any time, so it’s a good idea to have an umbrella handy. Temperatures are expected to remain steady through the afternoon, maintaining the mild conditions. Overall, expect a cloudy day with periods of light rainfall and gentle breezes.

15-Day Weather Outlook for Potomac

TomorrowTomorrow

Overcast 64°/52° 💧 None 💨 12 mph

Friday, Sep 25Fri Sep 25

Mostly cloudy 70°/50° 💧 None 💨 12 mph

Saturday, Sep 26Sat Sep 26

Light rain 65°/58° 💧 0.258 in 💨 14 mph

Sunday, Sep 27Sun Sep 27

Light rain 72°/58° 💧 0.077 in 💨 13 mph

Monday, Sep 28Mon Sep 28

Overcast 70°/60° 💧 0.001 in 💨 9 mph

Tuesday, Sep 29Tue Sep 29

Overcast 72°/59° 💧 0.003 in 💨 5 mph

Wednesday, Sep 30Wed Sep 30

Mostly sunny 78°/60° 💧 None 💨 7 mph

Thursday, Oct 1Thu Oct 1

Mostly sunny 83°/64° 💧 0.011 in 💨 12 mph

Friday, Oct 2Fri Oct 2

Light rain 81°/70° 💧 0.163 in 💨 12 mph

Saturday, Oct 3Sat Oct 3

Partly cloudy 74°/59° 💧 None 💨 7 mph

Sunday, Oct 4Sun Oct 4

Overcast 73°/60° 💧 0.001 in 💨 12 mph

Monday, Oct 5Mon Oct 5

Moderate rain 69°/61° 💧 1.116 in 💨 14 mph

Tuesday, Oct 6Tue Oct 6

Partly cloudy 67°/52° 💧 None 💨 7 mph

Wednesday, Oct 7Wed Oct 7

Mostly sunny 72°/54° 💧 None 💨 6 mph

Thursday, Oct 8Thu Oct 8

Sunny 57°/56° 💧 None 💨 5 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Potomac

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Potomac

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 5:00 PM

PM2.5 Fine particles Good 2,5µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 4,9µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Good 54,1µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 6,0µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is favorable for outdoor activities.

UV & HEALTH

UV, Sun & Health Outlook in Potomac

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 4,9Moderate 😊Good

Tomorrow UV 4,0Moderate 🙂Fair

Friday UV 5,6Moderate 😐Moderate

Saturday UV 5,5Moderate 😐Moderate

Sunday UV 6,0High 🙂Fair

Monday UV 6,0High —Unavailable

Tuesday UV 6,0High —Unavailable

Hourly UV index today

5:00 PMUV 0,9 6:00 PMUV 0,3 7:00 PMUV 0,0

Today's weather health advice Open today's recommendations.

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

Good air quality

Air quality is good and outdoor activities can be enjoyed normally.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Potomac

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · POTOMAC, MARYLAND

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 9:00 PM–10:00 PM.

88/100Best-hour score

BEST TIME TONIGHT 9:00 PM–10:00 PM Astronomical darkness: 8:33 PM–5:29 AM

☁ Cloud cover 5% Real hourly forecast for the best viewing hour.

☾ Moonlight 93% Waxing Gibbous · Moon about 32° above the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant -6° high at the best hour.

✦ Estimated visible meteors 0–1/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min5%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

ACTIVE NOW

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

NOV 6–NOV 30

LeonidsStart NOV 6 · Peak NOV 17 · End NOV 30 · ZHR 15 · 52% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

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Forecast data for Potomac were last refreshed today at 4:12 PM. The current forecast period extends through 25/09/2026 at 2:00 PM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.