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Current weather in Charlestown is clear sky.

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Is the weather forecast for Charlestown updated regularly?

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

Now · 7:58 PM

Charlestown Weather & Hourly Forecast

United States · Maryland · 21901

74°F

Sunny

Feels like: 72°F

💧 Humidity 46% 🌡 Pressure 29.97 inHg 💨 Wind 6 mph 👁 Visibility 25.1 mi ☁ Clouds 7% ☀️ UV index 0.0 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Charlestown

Today

8:00 PM

Clear night

74° 💧 None 💨 6 mph H 46%29.97 inHg

11:00 PM

Mostly clear night

68° 💧 0.000 in 💨 2 mph H 74%30.06 inHg

Tomorrow

2:00 AM

Clear night

64° 💧 0.002 in 💨 3 mph H 79%30.09 inHg

5:00 AM

Clear night

62° 💧 None 💨 4 mph H 93%30.09 inHg

8:00 AM

Sunny

65° 💧 None 💨 5 mph H 84%30.15 inHg

11:00 AM

Mostly sunny

76° 💧 None 💨 4 mph H 49%30.18 inHg

2:00 PM

Sunny

81° 💧 None 💨 3 mph H 31%30.15 inHg

5:00 PM

Sunny

81° 💧 None 💨 2 mph H 27%30.12 inHg

8:00 PM

Clear night

72° 💧 None 💨 1 mph H 43%30.18 inHg

11:00 PM

Mostly clear night

68° 💧 None 💨 1 mph H 57%30.24 inHg

Tuesday

2:00 AM

Clear night

64° 💧 None 💨 3 mph H 69%30.24 inHg

5:00 AM

Mostly cloudy night

63° 💧 None 💨 1 mph H 73%30.24 inHg

8:00 AM

Mostly sunny

66° 💧 None 💨 4 mph H 64%30.30 inHg

11:00 AM

Mostly sunny

78° 💧 None 💨 5 mph H 42%30.30 inHg

2:00 PM

Mostly cloudy

83° 💧 None 💨 6 mph H 36%30.24 inHg

5:00 PM

Partly cloudy

82° 💧 None 💨 9 mph H 43%30.21 inHg

Today

8:00 PM

Clear night

74° 💧 None 💨 6 mph H 46%29.97 inHg

9:00 PM

Clear night

73° 💧 None 💨 6 mph H 49%30.00 inHg

10:00 PM

Clear night

70° 💧 None 💨 3 mph H 59%30.03 inHg

11:00 PM

Mostly clear night

68° 💧 None 💨 2 mph H 74%30.06 inHg

Tomorrow

12:00 AM

Clear night

67° 💧 None 💨 0 mph H 78%30.06 inHg

1:00 AM

Clear night

66° 💧 0.000 in 💨 1 mph H 80%30.06 inHg

2:00 AM

Clear night

64° 💧 0.002 in 💨 3 mph H 79%30.09 inHg

3:00 AM

Clear night

63° 💧 None 💨 3 mph H 82%30.09 inHg

4:00 AM

Clear night

62° 💧 None 💨 3 mph H 88%30.09 inHg

5:00 AM

Clear night

62° 💧 None 💨 4 mph H 93%30.09 inHg

6:00 AM

Clear night

61° 💧 None 💨 4 mph H 94%30.12 inHg

7:00 AM

Sunny

61° 💧 None 💨 5 mph H 93%30.12 inHg

8:00 AM

Sunny

65° 💧 None 💨 5 mph H 84%30.15 inHg

9:00 AM

Sunny

70° 💧 None 💨 5 mph H 71%30.15 inHg

10:00 AM

Sunny

73° 💧 None 💨 4 mph H 58%30.18 inHg

11:00 AM

Mostly sunny

76° 💧 None 💨 4 mph H 49%30.18 inHg

12:00 PM

Mostly sunny

78° 💧 None 💨 3 mph H 42%30.18 inHg

1:00 PM

Sunny

79° 💧 None 💨 3 mph H 36%30.15 inHg

2:00 PM

Sunny

81° 💧 None 💨 3 mph H 31%30.15 inHg

3:00 PM

Sunny

81° 💧 None 💨 2 mph H 28%30.15 inHg

4:00 PM

Sunny

82° 💧 None 💨 2 mph H 27%30.12 inHg

5:00 PM

Sunny

81° 💧 None 💨 2 mph H 27%30.12 inHg

6:00 PM

Sunny

80° 💧 None 💨 2 mph H 28%30.15 inHg

7:00 PM

Sunny

76° 💧 None 💨 2 mph H 39%30.15 inHg

8:00 PM

Clear night

72° 💧 None 💨 1 mph H 43%30.18 inHg

9:00 PM

Clear night

70° 💧 None 💨 2 mph H 48%30.21 inHg

10:00 PM

Clear night

69° 💧 None 💨 2 mph H 55%30.21 inHg

11:00 PM

Mostly clear night

68° 💧 None 💨 1 mph H 57%30.24 inHg

Tuesday

12:00 AM

Mostly clear night

68° 💧 None 💨 0 mph H 59%30.24 inHg

1:00 AM

Mostly clear night

66° 💧 None 💨 2 mph H 65%30.24 inHg

2:00 AM

Clear night

64° 💧 None 💨 3 mph H 69%30.24 inHg

3:00 AM

Mostly cloudy night

63° 💧 None 💨 2 mph H 70%30.21 inHg

4:00 AM

Partly cloudy night

63° 💧 None 💨 1 mph H 72%30.21 inHg

5:00 AM

Mostly cloudy night

63° 💧 None 💨 1 mph H 73%30.24 inHg

6:00 AM

Mostly cloudy night

62° 💧 None 💨 2 mph H 78%30.24 inHg

7:00 AM

Partly cloudy

61° 💧 None 💨 3 mph H 76%30.27 inHg

8:00 AM

Mostly sunny

66° 💧 None 💨 4 mph H 64%30.30 inHg

9:00 AM

Sunny

72° 💧 None 💨 2 mph H 50%30.30 inHg

10:00 AM

Mostly sunny

76° 💧 None 💨 2 mph H 45%30.30 inHg

11:00 AM

Mostly sunny

78° 💧 None 💨 5 mph H 42%30.30 inHg

12:00 PM

Mostly sunny

80° 💧 None 💨 5 mph H 39%30.30 inHg

1:00 PM

Partly cloudy

82° 💧 None 💨 5 mph H 36%30.27 inHg

2:00 PM

Mostly cloudy

83° 💧 None 💨 6 mph H 36%30.24 inHg

3:00 PM

Sunny

83° 💧 None 💨 6 mph H 37%30.24 inHg

4:00 PM

Mostly sunny

83° 💧 None 💨 7 mph H 40%30.21 inHg

5:00 PM

Partly cloudy

82° 💧 None 💨 9 mph H 43%30.21 inHg

6:00 PM

Mostly sunny

81° 💧 None 💨 8 mph H 45%30.21 inHg

7:00 PM

Mostly sunny

79° 💧 None 💨 5 mph H 49%30.21 inHg

8:00 PM

Clear night

76° 💧 None 💨 4 mph H 58%30.24 inHg

9:00 PM

Clear night

74° 💧 None 💨 5 mph H 64%30.24 inHg

10:00 PM

Clear night

73° 💧 None 💨 5 mph H 66%30.24 inHg

11:00 PM

Clear night

72° 💧 None 💨 7 mph H 68%30.24 inHg

Wednesday

12:00 AM

Mostly clear night

71° 💧 None 💨 7 mph H 71%30.24 inHg

1:00 AM

Mostly clear night

71° 💧 None 💨 6 mph H 76%30.24 inHg

2:00 AM

Mostly clear night

70° 💧 None 💨 5 mph H 82%30.24 inHg

3:00 AM

Clear night

69° 💧 None 💨 5 mph H 81%30.24 inHg

4:00 AM

Partly cloudy night

69° 💧 None 💨 6 mph H 77%30.24 inHg

5:00 AM

Mostly cloudy night

68° 💧 None 💨 6 mph H 74%30.21 inHg

6:00 AM

Mostly cloudy night

68° 💧 None 💨 6 mph H 75%30.24 inHg

7:00 AM

Partly cloudy

68° 💧 None 💨 6 mph H 76%30.24 inHg

8:00 AM

Mostly sunny

71° 💧 None 💨 7 mph H 70%30.24 inHg

11:00 AM

Mostly sunny

79° 💧 None 💨 11 mph H 59%30.21 inHg

2:00 PM

Mostly sunny

84° 💧 None 💨 13 mph H 52%30.15 inHg

5:00 PM

Mostly sunny

85° 💧 None 💨 13 mph H 53%30.06 inHg

8:00 PM

Mostly clear night

80° 💧 None 💨 14 mph H 68%30.00 inHg

11:00 PM

Partly cloudy night

78° 💧 None 💨 11 mph H 78%30.00 inHg

Thursday

2:00 AM

Clear night

78° 💧 None 💨 13 mph H 80%29.97 inHg

5:00 AM

Clear night

78° 💧 None 💨 11 mph H 80%29.94 inHg

8:00 AM

Sunny

78° 💧 None 💨 11 mph H 77%29.94 inHg

11:00 AM

Sunny

85° 💧 None 💨 11 mph H 62%29.91 inHg

2:00 PM

Mostly sunny

89° 💧 None 💨 12 mph H 51%29.80 inHg

5:00 PM

Mostly sunny

89° 💧 None 💨 12 mph H 52%29.74 inHg

8:00 PM

Moderate rain

74° 💧 None 💨 13 mph H 94%29.80 inHg

11:00 PM

Mostly clear night

75° 💧 None 💨 2 mph H 92%29.77 inHg

Friday

2:00 AM

Overcast night

74° 💧 None 💨 4 mph H 93%29.80 inHg

5:00 AM

Overcast night

73° 💧 None 💨 9 mph H 94%29.80 inHg

8:00 AM

Sunny

71° 💧 None 💨 9 mph H 90%29.88 inHg

11:00 AM

Sunny

77° 💧 None 💨 9 mph H 63%29.91 inHg

2:00 PM

Sunny

81° 💧 None 💨 8 mph H 45%29.91 inHg

5:00 PM

Sunny

81° 💧 None 💨 8 mph H 40%29.88 inHg

8:00 PM

Clear night

75° 💧 None 💨 7 mph H 50%29.94 inHg

11:00 PM

Clear night

70° 💧 None 💨 7 mph H 66%30.00 inHg

Saturday

2:00 AM

Clear night

67° 💧 None 💨 7 mph H 75%30.00 inHg

5:00 AM

Clear night

65° 💧 None 💨 7 mph H 77%30.03 inHg

8:00 AM

Overcast

65° 💧 None 💨 6 mph H 73%30.06 inHg

2:00 PM

Overcast

80° 💧 None 💨 4 mph H 49%30.03 inHg

8:00 PM

Overcast night

74° 💧 None 💨 10 mph H 74%30.03 inHg

Sunday

2:00 AM

Partly cloudy night

70° 💧 None 💨 5 mph H 81%30.06 inHg

8:00 AM

Mostly sunny

70° 💧 None 💨 3 mph H 80%30.09 inHg

2:00 PM

Mostly sunny

83° 💧 None 💨 5 mph H 53%30.06 inHg

8:00 PM

Mostly clear night

81° 💧 None 💨 4 mph H 64%30.03 inHg

Monday

2:00 AM

Clear night

74° 💧 None 💨 6 mph H 80%30.09 inHg

8:00 AM

Mostly cloudy

75° 💧 None 💨 4 mph H 71%30.12 inHg

2:00 PM

Partly cloudy

88° 💧 None 💨 3 mph H 47%30.06 inHg

8:00 PM

Mostly clear night

83° 💧 None 💨 4 mph H 58%30.06 inHg

Tuesday

2:00 AM

Mostly clear night

75° 💧 None 💨 6 mph H 81%30.12 inHg

8:00 AM

Partly cloudy

74° 💧 None 💨 6 mph H 81%30.18 inHg

2:00 PM

Sunny

87° 💧 None 💨 12 mph H 54%30.18 inHg

8:00 PM

Clear night

82° 💧 None 💨 9 mph H 56%30.15 inHg

Wednesday

2:00 AM

Clear night

76° 💧 None 💨 10 mph H 85%30.18 inHg

8:00 AM

Sunny

77° 💧 None 💨 8 mph H 83%30.18 inHg

2:00 PM

Mostly sunny

88° 💧 None 💨 5 mph H 55%30.15 inHg

8:00 PM

Overcast night

83° 💧 None 💨 3 mph H 69%30.15 inHg

Thursday

2:00 AM

Mostly clear night

74° 💧 None 💨 10 mph H 58%30.21 inHg

8:00 AM

Partly cloudy

70° 💧 None 💨 10 mph H 64%30.27 inHg

2:00 PM

Partly cloudy

79° 💧 None 💨 4 mph H 49%30.21 inHg

8:00 PM

Light rain

75° 💧 None 💨 10 mph H 73%30.15 inHg

Friday

2:00 AM

Clear night

67° 💧 None 💨 5 mph H 86%30.09 inHg

8:00 AM

Mostly sunny

66° 💧 None 💨 6 mph H 86%30.03 inHg

2:00 PM

Partly cloudy

76° 💧 None 💨 2 mph H 48%29.94 inHg

8:00 PM

Mostly clear night

70° 💧 None 💨 5 mph H 78%29.88 inHg

Saturday

2:00 AM

Clear night

64° 💧 None 💨 18 mph H 75%29.88 inHg

8:00 AM

Overcast

58° 💧 None 💨 17 mph H 72%29.94 inHg

2:00 PM

Light rain

61° 💧 None 💨 19 mph H 66%30.00 inHg

8:00 PM

Partly cloudy night

57° 💧 None 💨 17 mph H 80%30.09 inHg

Sunday

2:00 AM

Clear night

56° 💧 None 💨 15 mph H 65%30.15 inHg

8:00 AM

Sunny

56° 💧 None 💨 13 mph H 56%30.24 inHg

2:00 PM

Sunny

67° 💧 None 💨 11 mph H 36%30.24 inHg

8:00 PM

Clear night

63° 💧 None 💨 7 mph H 51%30.27 inHg

Monday

2:00 AM

Clear night

56° 💧 None 💨 4 mph H 75%30.33 inHg

8:00 AM

Sunny

56° 💧 None 💨 6 mph H 65%30.39 inHg

In Charlestown and, more broadly, across the state of Maryland: The evening will feature a mix of sun and clouds, with temperatures remaining mild to warm, ranging from 69 to 76 degrees Fahrenheit. Winds will be light, coming from the north at around 6 mph, with occasional gusts reaching up to 14 mph. No precipitation is expected during the next few hours, making for a relatively calm and pleasant evening. Temperatures are likely to stay steady as the night progresses, creating comfortable conditions for outdoor activities. Overall, weather conditions will be mild with gentle breezes and no significant weather changes anticipated tonight.

15-Day Weather Outlook for Charlestown

Tuesday, Sep 8Tue Sep 8

Mostly sunny 83°/61° 💧 None 💨 9 mph

Wednesday, Sep 9Wed Sep 9

Mostly sunny 85°/68° 💧 0.005 in 💨 13 mph

Thursday, Sep 10Thu Sep 10

Mostly sunny 89°/78° 💧 0.029 in 💨 14 mph

Friday, Sep 11Fri Sep 11

Moderate rain 81°/71° 💧 0.087 in 💨 13 mph

Saturday, Sep 12Sat Sep 12

Overcast 80°/65° 💧 None 💨 7 mph

Sunday, Sep 13Sun Sep 13

Overcast 83°/70° 💧 0.000 in 💨 10 mph

Monday, Sep 14Mon Sep 14

Mostly sunny 88°/74° 💧 0.000 in 💨 6 mph

Tuesday, Sep 15Tue Sep 15

Mostly sunny 87°/74° 💧 None 💨 12 mph

Wednesday, Sep 16Wed Sep 16

Mostly sunny 88°/76° 💧 0.001 in 💨 10 mph

Thursday, Sep 17Thu Sep 17

Overcast 83°/70° 💧 0.065 in 💨 10 mph

Friday, Sep 18Fri Sep 18

Light rain 76°/66° 💧 0.012 in 💨 10 mph

Saturday, Sep 19Sat Sep 19

Light rain 70°/58° 💧 0.045 in 💨 19 mph

Sunday, Sep 20Sun Sep 20

Partly cloudy 67°/56° 💧 0.055 in 💨 17 mph

Monday, Sep 21Mon Sep 21

Sunny 63°/56° 💧 None 💨 7 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Charlestown

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Charlestown

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 8:00 PM

PM2.5 Fine particles Good 3,7µg/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 5,2µg/m³

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

O₃ Ozone Good 42,6µg/m³

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

NO₂ Nitrogen dioxide Good 4,1µg/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 Charlestown

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 7,2High 😊Good

Tomorrow UV 6,8High 😐Moderate

Tuesday UV 6,3High 😐Moderate

Wednesday UV 6,9High 🙂Fair

Thursday UV 3,9Moderate 🙂Fair

Friday UV 6,0High —Unavailable

Saturday UV 7,0High —Unavailable

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 Charlestown

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · CHARLESTOWN, MARYLAND

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 3:00 AM–4:00 AM.

99/100Best-hour score

BEST TIME TONIGHT 3:00 AM–4:00 AM Astronomical darkness: 9:00 PM–5:05 AM

☁ Cloud cover 0% Real hourly forecast for the best viewing hour.

☾ Moonlight 22% Waning Crescent · Moon about 6° above the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 65° high at the best hour.

✦ Estimated visible meteors 1–4/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min73%

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

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

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

UPCOMING

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

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.

DISCOVER WEATHER NEARBY Weather in other cities

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Forecast data for Charlestown were last refreshed today at 7:58 PM. The current forecast period extends through 08/09/2026 at 5:00 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.