What is the weather in National Harbor right now?

Current weather in National Harbor is broken clouds.

Where can I find the hourly weather forecast for National Harbor?

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

Is the weather forecast for National Harbor updated regularly?

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

Now · 5:58 AM

National Harbor Weather & Hourly Forecast

United States · Maryland · 20745

76°F

Mostly cloudy night

Feels like: 77°F

💧 Humidity 82% 🌡 Pressure 30.00 inHg 💨 Wind 2 mph 👁 Visibility 6.2 mi ☁ Clouds 69% ☀️ UV index 0.0 · Low 🌅 Sunrise 6:38 AM 🌇 Sunset 7:37 PM

Hourly Forecast for National Harbor

Today

6:00 AM

Mostly cloudy night

76° 💧 None 💨 2 mph H 82%30.00 inHg

9:00 AM

Partly cloudy

77° 💧 None 💨 4 mph H 79%30.03 inHg

12:00 PM

Light rain

85° 💧 0.10 in 💨 8 mph H 53%30.06 inHg

3:00 PM

Overcast

83° 💧 None 💨 3 mph H 80%30.06 inHg

6:00 PM

Mostly cloudy

83° 💧 None 💨 4 mph H 58%30.00 inHg

9:00 PM

Clear night

78° 💧 0.03 in 💨 5 mph H 83%30.03 inHg

Tomorrow

12:00 AM

Clear night

76° 💧 0.01 in 💨 4 mph H 95%30.00 inHg

3:00 AM

Light rain

76° 💧 0.01 in 💨 4 mph H 98%30.00 inHg

6:00 AM

Mostly cloudy night

76° 💧 None 💨 2 mph H 98%29.97 inHg

9:00 AM

Mostly sunny

79° 💧 None 💨 3 mph H 84%29.97 inHg

12:00 PM

Mostly cloudy

90° 💧 None 💨 5 mph H 46%29.97 inHg

3:00 PM

Overcast

98° 💧 None 💨 7 mph H 36%29.94 inHg

6:00 PM

Overcast

96° 💧 0.04 in 💨 1 mph H 44%29.85 inHg

9:00 PM

Light rain

73° 💧 0.02 in 💨 8 mph H 88%29.97 inHg

Friday

12:00 AM

Light rain

73° 💧 0.04 in 💨 5 mph H 91%29.94 inHg

3:00 AM

Overcast night

73° 💧 None 💨 8 mph H 91%29.94 inHg

Today

6:00 AM

Mostly cloudy night

76° 💧 None 💨 2 mph H 82%30.00 inHg

7:00 AM

Mostly cloudy

76° 💧 None 💨 2 mph H 84%30.00 inHg

8:00 AM

Mostly cloudy

76° 💧 None 💨 2 mph H 84%30.00 inHg

9:00 AM

Partly cloudy

77° 💧 None 💨 4 mph H 79%30.03 inHg

10:00 AM

Mostly cloudy

81° 💧 None 💨 3 mph H 70%30.06 inHg

11:00 AM

Mostly cloudy

85° 💧 None 💨 4 mph H 56%30.06 inHg

12:00 PM

Light rain

85° 💧 0.01 in 💨 8 mph H 53%30.06 inHg

1:00 PM

Moderate rain

83° 💧 0.09 in 💨 9 mph H 89%30.06 inHg

2:00 PM

Mostly cloudy

81° 💧 None 💨 5 mph H 76%30.03 inHg

3:00 PM

Overcast

83° 💧 None 💨 3 mph H 80%30.06 inHg

4:00 PM

Overcast

85° 💧 None 💨 4 mph H 59%30.03 inHg

5:00 PM

Mostly cloudy

85° 💧 None 💨 2 mph H 55%30.00 inHg

6:00 PM

Mostly cloudy

83° 💧 None 💨 4 mph H 58%30.00 inHg

7:00 PM

Partly cloudy

82° 💧 None 💨 6 mph H 69%30.00 inHg

8:00 PM

Partly cloudy night

80° 💧 None 💨 6 mph H 79%30.00 inHg

9:00 PM

Clear night

78° 💧 None 💨 5 mph H 83%30.03 inHg

10:00 PM

Light rain

77° 💧 0.03 in 💨 5 mph H 92%30.03 inHg

11:00 PM

Clear night

76° 💧 None 💨 4 mph H 93%30.03 inHg

Tomorrow

12:00 AM

Clear night

76° 💧 None 💨 4 mph H 95%30.00 inHg

1:00 AM

Clear night

76° 💧 None 💨 2 mph H 97%30.00 inHg

2:00 AM

Light rain

76° 💧 0.01 in 💨 4 mph H 98%30.00 inHg

3:00 AM

Light rain

76° 💧 0.01 in 💨 4 mph H 98%30.00 inHg

4:00 AM

Mostly cloudy night

76° 💧 None 💨 3 mph H 99%29.97 inHg

5:00 AM

Mostly cloudy night

76° 💧 None 💨 4 mph H 99%29.97 inHg

6:00 AM

Mostly cloudy night

76° 💧 None 💨 2 mph H 98%29.97 inHg

7:00 AM

Partly cloudy

76° 💧 None 💨 3 mph H 98%29.97 inHg

8:00 AM

Partly cloudy

78° 💧 None 💨 3 mph H 93%29.97 inHg

9:00 AM

Mostly sunny

79° 💧 None 💨 3 mph H 84%29.97 inHg

10:00 AM

Mostly cloudy

83° 💧 None 💨 3 mph H 72%29.97 inHg

11:00 AM

Mostly cloudy

87° 💧 None 💨 4 mph H 57%29.97 inHg

12:00 PM

Mostly cloudy

90° 💧 None 💨 5 mph H 46%29.97 inHg

1:00 PM

Mostly cloudy

92° 💧 None 💨 6 mph H 41%29.94 inHg

2:00 PM

Mostly cloudy

92° 💧 None 💨 7 mph H 38%29.94 inHg

3:00 PM

Overcast

98° 💧 None 💨 7 mph H 36%29.94 inHg

4:00 PM

Overcast

98° 💧 None 💨 4 mph H 35%29.91 inHg

5:00 PM

Overcast

98° 💧 None 💨 2 mph H 36%29.88 inHg

6:00 PM

Overcast

96° 💧 None 💨 1 mph H 44%29.85 inHg

7:00 PM

Overcast

90° 💧 None 💨 7 mph H 50%29.88 inHg

8:00 PM

Light rain

75° 💧 0.04 in 💨 10 mph H 85%29.91 inHg

9:00 PM

Light rain

73° 💧 0.01 in 💨 8 mph H 88%29.97 inHg

10:00 PM

Light rain

73° 💧 0.01 in 💨 6 mph H 91%29.97 inHg

11:00 PM

Light rain

73° 💧 0.00 in 💨 5 mph H 92%29.94 inHg

Friday

12:00 AM

Light rain

73° 💧 0.01 in 💨 5 mph H 91%29.94 inHg

1:00 AM

Light rain

72° 💧 0.03 in 💨 7 mph H 94%29.97 inHg

2:00 AM

Light rain

72° 💧 0.01 in 💨 10 mph H 94%29.94 inHg

3:00 AM

Overcast night

73° 💧 None 💨 8 mph H 91%29.94 inHg

4:00 AM

Overcast night

72° 💧 None 💨 6 mph H 92%29.91 inHg

5:00 AM

Mostly cloudy night

72° 💧 None 💨 5 mph H 93%29.91 inHg

6:00 AM

Mostly cloudy night

72° 💧 None 💨 4 mph H 92%29.88 inHg

7:00 AM

Mostly cloudy

73° 💧 None 💨 4 mph H 90%29.91 inHg

8:00 AM

Partly cloudy

77° 💧 None 💨 3 mph H 83%29.91 inHg

9:00 AM

Sunny

82° 💧 None 💨 5 mph H 71%29.88 inHg

10:00 AM

Sunny

87° 💧 None 💨 5 mph H 57%29.88 inHg

11:00 AM

Mostly sunny

91° 💧 None 💨 6 mph H 48%29.88 inHg

12:00 PM

Mostly sunny

94° 💧 None 💨 8 mph H 44%29.88 inHg

1:00 PM

Partly cloudy

95° 💧 None 💨 9 mph H 41%29.85 inHg

2:00 PM

Partly cloudy

97° 💧 None 💨 8 mph H 36%29.85 inHg

3:00 PM

Partly cloudy

99° 💧 None 💨 9 mph H 32%29.83 inHg

4:00 PM

Mostly cloudy

98° 💧 None 💨 7 mph H 34%29.80 inHg

5:00 PM

Light rain

89° 💧 0.02 in 💨 17 mph H 51%29.80 inHg

6:00 PM

Light rain

82° 💧 0.01 in 💨 7 mph H 70%29.77 inHg

7:00 PM

Mostly cloudy

81° 💧 None 💨 7 mph H 70%29.77 inHg

8:00 PM

Mostly cloudy night

81° 💧 None 💨 7 mph H 68%29.83 inHg

9:00 PM

Overcast night

80° 💧 None 💨 7 mph H 71%29.83 inHg

10:00 PM

Overcast night

80° 💧 None 💨 9 mph H 68%29.85 inHg

11:00 PM

Overcast night

79° 💧 None 💨 11 mph H 68%29.85 inHg

Saturday

12:00 AM

Mostly cloudy night

76° 💧 None 💨 10 mph H 76%29.88 inHg

1:00 AM

Mostly cloudy night

74° 💧 None 💨 7 mph H 78%29.88 inHg

2:00 AM

Mostly cloudy night

73° 💧 None 💨 8 mph H 75%29.85 inHg

3:00 AM

Clear night

72° 💧 None 💨 8 mph H 74%29.85 inHg

4:00 AM

Clear night

71° 💧 None 💨 8 mph H 73%29.85 inHg

5:00 AM

Clear night

70° 💧 None 💨 7 mph H 74%29.85 inHg

6:00 AM

Clear night

68° 💧 None 💨 7 mph H 75%29.88 inHg

7:00 AM

Sunny

68° 💧 None 💨 6 mph H 75%29.88 inHg

8:00 AM

Sunny

69° 💧 None 💨 7 mph H 68%29.91 inHg

9:00 AM

Mostly sunny

73° 💧 None 💨 8 mph H 57%29.91 inHg

10:00 AM

Sunny

76° 💧 None 💨 9 mph H 49%29.91 inHg

11:00 AM

Sunny

78° 💧 None 💨 10 mph H 46%29.91 inHg

12:00 PM

Sunny

81° 💧 None 💨 10 mph H 41%29.91 inHg

1:00 PM

Sunny

83° 💧 None 💨 10 mph H 35%29.88 inHg

2:00 PM

Sunny

83° 💧 None 💨 11 mph H 33%29.88 inHg

3:00 PM

Sunny

84° 💧 None 💨 11 mph H 34%29.88 inHg

4:00 PM

Sunny

83° 💧 None 💨 10 mph H 35%29.88 inHg

5:00 PM

Sunny

82° 💧 None 💨 10 mph H 36%29.88 inHg

6:00 PM

Sunny

80° 💧 None 💨 9 mph H 40%29.88 inHg

7:00 PM

Sunny

77° 💧 None 💨 7 mph H 45%29.88 inHg

8:00 PM

Clear night

74° 💧 None 💨 6 mph H 49%29.88 inHg

9:00 PM

Clear night

72° 💧 None 💨 6 mph H 55%29.91 inHg

10:00 PM

Clear night

71° 💧 None 💨 6 mph H 59%29.94 inHg

11:00 PM

Clear night

71° 💧 None 💨 8 mph H 61%29.94 inHg

Sunday

12:00 AM

Clear night

69° 💧 None 💨 7 mph H 67%29.97 inHg

1:00 AM

Clear night

68° 💧 None 💨 6 mph H 68%29.97 inHg

2:00 AM

Clear night

66° 💧 None 💨 5 mph H 68%30.00 inHg

3:00 AM

Clear night

65° 💧 None 💨 6 mph H 68%30.00 inHg

4:00 AM

Clear night

64° 💧 None 💨 6 mph H 71%30.00 inHg

5:00 AM

Clear night

63° 💧 None 💨 7 mph H 73%30.00 inHg

In National Harbor and, more broadly, across the state of Maryland: The evening will feature a mix of sun and clouds, with temperatures remaining hot between 84 and 90 degrees Fahrenheit. A slight chance of rain exists, with some areas possibly seeing around 0.03 inches of precipitation, and the highest probability of rain reaching 93%. Winds will be light, coming from the northwest at around 4 mph, with gusts up to 10 mph. Overall, expect warm and partly cloudy conditions through the night, with only a minimal chance of light rain.

15-Day Weather Outlook for National Harbor

TomorrowTomorrow

Light rain 98°/73° 💧 0.08 in 💨 10 mph

Friday, Sep 4Fri Sep 4

Light rain 99°/72° 💧 0.07 in 💨 17 mph

Saturday, Sep 5Sat Sep 5

Sunny 83°/69° 💧 None 💨 11 mph

Sunday, Sep 6Sun Sep 6

Sunny 81°/63° 💧 None 💨 8 mph

Monday, Sep 7Mon Sep 7

Mostly sunny 83°/61° 💧 None 💨 8 mph

Tuesday, Sep 8Tue Sep 8

Light rain 88°/64° 💧 0.01 in 💨 9 mph

Wednesday, Sep 9Wed Sep 9

Light rain 78°/70° 💧 0.09 in 💨 8 mph

Thursday, Sep 10Thu Sep 10

Light rain 90°/70° 💧 0.04 in 💨 13 mph

Friday, Sep 11Fri Sep 11

Overcast 75°/67° 💧 None 💨 10 mph

Saturday, Sep 12Sat Sep 12

Light rain 76°/61° 💧 0.18 in 💨 7 mph

Sunday, Sep 13Sun Sep 13

Light rain 80°/65° 💧 0.01 in 💨 9 mph

Monday, Sep 14Mon Sep 14

Mostly cloudy 79°/62° 💧 None 💨 5 mph

Tuesday, Sep 15Tue Sep 15

Partly cloudy 86°/62° 💧 None 💨 11 mph

Wednesday, Sep 16Wed Sep 16

Sunny 84°/60° 💧 None 💨 6 mph

Thursday, Sep 17Thu Sep 17

Sunny 89°/64° 💧 None 💨 8 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in National Harbor

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for National Harbor

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 6:00 AM

PM2.5 Fine particles Good 4,8µg/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 6,0µg/m³

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

O₃ Ozone Good 20,5µg/m³

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

NO₂ Nitrogen dioxide Good 3,4µg/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 National Harbor

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 7,6High 😊Good

Tomorrow UV 8,0Very high 😐Moderate

Friday UV 7,8High 🙂Fair

Saturday UV 7,2High 🙂Fair

Sunday UV 7,0High 😊Good

Monday UV 7,0High —Unavailable

Tuesday UV 6,0High —Unavailable

Hourly UV index today

7:00 AMUV 0,0 8:00 AMUV 0,5 9:00 AMUV 1,3 10:00 AMUV 3,1 11:00 AMUV 5,2 12:00 PMUV 6,8 1:00 PMUV 7,6 2:00 PMUV 7,2 3:00 PMUV 5,8 4:00 PMUV 3,5 5:00 PMUV 1,4 6:00 PMUV 0,7

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

Strong UV exposure

Protect exposed skin with SPF 30+ sunscreen, wear sunglasses, and try to limit direct midday sun.

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 National Harbor

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

Internal PR simulation: 3.77 Population: 4,454

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Forecast data for National Harbor were last refreshed today at 5:58 AM. The current forecast period extends through 04/09/2026 at 3:00 AM. 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.