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Current weather in Jefferson is clear sky.

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

Now · 12:01 PM

Jefferson Weather & Hourly Forecast

United States · Maryland · 21755

79°F

Sunny

Feels like: 79°F

💧 Humidity 54% 🌡 Pressure 30.36 inHg 💨 Wind 5 mph 👁 Visibility 22.8 mi ☁ Clouds 0% ☀️ UV index 4.5 · Moderate 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Jefferson

Today

1:00 PM

Sunny

81° 💧 None 💨 6 mph H 51%30.33 inHg

4:00 PM

Mostly cloudy

86° 💧 None 💨 7 mph H 45%30.27 inHg

7:00 PM

Sunny

82° 💧 None 💨 5 mph H 55%30.24 inHg

10:00 PM

Clear night

76° 💧 None 💨 6 mph H 62%30.27 inHg

Tomorrow

1:00 AM

Clear night

72° 💧 None 💨 4 mph H 75%30.27 inHg

4:00 AM

Clear night

69° 💧 None 💨 2 mph H 83%30.24 inHg

7:00 AM

Sunny

67° 💧 None 💨 1 mph H 88%30.24 inHg

10:00 AM

Sunny

78° 💧 None 💨 4 mph H 66%30.24 inHg

1:00 PM

Partly cloudy

88° 💧 0.004 in 💨 5 mph H 54%30.18 inHg

4:00 PM

Light thunderstorms

84° 💧 0.039 in 💨 7 mph H 70%30.12 inHg

7:00 PM

Mostly sunny

81° 💧 None 💨 5 mph H 79%30.06 inHg

10:00 PM

Partly cloudy night

78° 💧 None 💨 4 mph H 89%30.09 inHg

Friday

1:00 AM

Mostly clear night

77° 💧 None 💨 6 mph H 83%30.06 inHg

4:00 AM

Clear night

75° 💧 None 💨 7 mph H 86%30.06 inHg

7:00 AM

Mostly cloudy

73° 💧 None 💨 8 mph H 83%30.09 inHg

10:00 AM

Overcast

78° 💧 0.000 in 💨 9 mph H 64%30.12 inHg

Today

1:00 PM

Sunny

81° 💧 None 💨 6 mph H 51%30.33 inHg

2:00 PM

Sunny

84° 💧 None 💨 7 mph H 48%30.30 inHg

3:00 PM

Mostly sunny

85° 💧 None 💨 7 mph H 46%30.27 inHg

4:00 PM

Mostly cloudy

86° 💧 None 💨 7 mph H 45%30.27 inHg

5:00 PM

Partly cloudy

86° 💧 None 💨 7 mph H 45%30.24 inHg

6:00 PM

Mostly sunny

85° 💧 None 💨 6 mph H 48%30.24 inHg

7:00 PM

Sunny

82° 💧 None 💨 5 mph H 55%30.24 inHg

8:00 PM

Clear night

79° 💧 None 💨 6 mph H 59%30.24 inHg

9:00 PM

Mostly cloudy night

77° 💧 None 💨 6 mph H 60%30.27 inHg

10:00 PM

Clear night

76° 💧 None 💨 6 mph H 62%30.27 inHg

11:00 PM

Mostly clear night

74° 💧 None 💨 4 mph H 68%30.27 inHg

Tomorrow

12:00 AM

Clear night

73° 💧 None 💨 4 mph H 71%30.27 inHg

1:00 AM

Clear night

72° 💧 None 💨 4 mph H 75%30.27 inHg

2:00 AM

Clear night

70° 💧 None 💨 3 mph H 78%30.24 inHg

3:00 AM

Clear night

69° 💧 None 💨 2 mph H 81%30.24 inHg

4:00 AM

Clear night

69° 💧 None 💨 2 mph H 83%30.24 inHg

5:00 AM

Clear night

68° 💧 None 💨 2 mph H 85%30.24 inHg

6:00 AM

Clear night

68° 💧 None 💨 1 mph H 86%30.24 inHg

7:00 AM

Sunny

67° 💧 None 💨 1 mph H 88%30.24 inHg

8:00 AM

Sunny

70° 💧 None 💨 2 mph H 80%30.24 inHg

9:00 AM

Sunny

74° 💧 None 💨 2 mph H 72%30.24 inHg

10:00 AM

Sunny

78° 💧 None 💨 4 mph H 66%30.24 inHg

11:00 AM

Sunny

82° 💧 None 💨 5 mph H 61%30.24 inHg

12:00 PM

Sunny

85° 💧 None 💨 6 mph H 57%30.21 inHg

1:00 PM

Partly cloudy

88° 💧 None 💨 5 mph H 54%30.18 inHg

2:00 PM

Mostly sunny

89° 💧 0.001 in 💨 7 mph H 53%30.15 inHg

3:00 PM

Overcast

91° 💧 0.003 in 💨 7 mph H 50%30.12 inHg

4:00 PM

Light thunderstorms

84° 💧 0.035 in 💨 7 mph H 70%30.12 inHg

5:00 PM

Light rain

83° 💧 0.004 in 💨 4 mph H 71%30.09 inHg

6:00 PM

Mostly cloudy

83° 💧 None 💨 5 mph H 71%30.06 inHg

7:00 PM

Mostly sunny

81° 💧 None 💨 5 mph H 79%30.06 inHg

8:00 PM

Partly cloudy night

79° 💧 None 💨 4 mph H 87%30.09 inHg

9:00 PM

Mostly cloudy night

78° 💧 None 💨 2 mph H 89%30.09 inHg

10:00 PM

Partly cloudy night

78° 💧 None 💨 4 mph H 89%30.09 inHg

11:00 PM

Mostly cloudy night

78° 💧 None 💨 5 mph H 86%30.09 inHg

Friday

12:00 AM

Overcast night

78° 💧 None 💨 6 mph H 83%30.06 inHg

1:00 AM

Mostly clear night

77° 💧 None 💨 6 mph H 83%30.06 inHg

2:00 AM

Clear night

77° 💧 None 💨 8 mph H 84%30.06 inHg

3:00 AM

Clear night

76° 💧 None 💨 7 mph H 84%30.06 inHg

4:00 AM

Clear night

75° 💧 None 💨 7 mph H 86%30.06 inHg

5:00 AM

Partly cloudy night

74° 💧 None 💨 7 mph H 86%30.06 inHg

6:00 AM

Mostly cloudy night

74° 💧 None 💨 7 mph H 86%30.06 inHg

7:00 AM

Mostly cloudy

73° 💧 None 💨 8 mph H 83%30.09 inHg

8:00 AM

Mostly cloudy

74° 💧 None 💨 8 mph H 79%30.09 inHg

9:00 AM

Partly cloudy

76° 💧 None 💨 9 mph H 72%30.09 inHg

10:00 AM

Overcast

78° 💧 0.000 in 💨 9 mph H 64%30.12 inHg

11:00 AM

Overcast

79° 💧 None 💨 9 mph H 60%30.12 inHg

12:00 PM

Mostly cloudy

80° 💧 None 💨 9 mph H 56%30.12 inHg

1:00 PM

Mostly cloudy

82° 💧 None 💨 7 mph H 50%30.09 inHg

2:00 PM

Mostly cloudy

83° 💧 None 💨 7 mph H 46%30.09 inHg

3:00 PM

Mostly cloudy

84° 💧 None 💨 8 mph H 44%30.06 inHg

4:00 PM

Partly cloudy

83° 💧 None 💨 8 mph H 43%30.06 inHg

5:00 PM

Partly cloudy

83° 💧 None 💨 9 mph H 38%30.06 inHg

6:00 PM

Mostly cloudy

81° 💧 None 💨 8 mph H 37%30.06 inHg

7:00 PM

Mostly cloudy

78° 💧 None 💨 7 mph H 43%30.06 inHg

8:00 PM

Mostly clear night

74° 💧 None 💨 6 mph H 51%30.09 inHg

Saturday

5:00 AM

Partly cloudy night

62° 💧 None 💨 9 mph H 75%30.15 inHg

8:00 AM

Mostly sunny

60° 💧 None 💨 6 mph H 74%30.18 inHg

11:00 AM

Mostly sunny

70° 💧 None 💨 4 mph H 59%30.15 inHg

2:00 PM

Overcast

78° 💧 None 💨 3 mph H 47%30.09 inHg

5:00 PM

Mostly sunny

79° 💧 None 💨 5 mph H 46%30.00 inHg

8:00 PM

Mostly clear night

74° 💧 None 💨 10 mph H 57%30.00 inHg

11:00 PM

Mostly clear night

71° 💧 None 💨 10 mph H 71%30.03 inHg

Sunday

2:00 AM

Mostly clear night

70° 💧 None 💨 11 mph H 82%30.00 inHg

5:00 AM

Mostly clear night

70° 💧 None 💨 10 mph H 85%29.94 inHg

8:00 AM

Mostly cloudy

71° 💧 None 💨 11 mph H 82%29.94 inHg

11:00 AM

Mostly cloudy

79° 💧 None 💨 8 mph H 70%29.91 inHg

2:00 PM

Partly cloudy

85° 💧 None 💨 6 mph H 59%29.85 inHg

5:00 PM

Light thunderstorms

78° 💧 None 💨 4 mph H 89%29.83 inHg

8:00 PM

Light rain

73° 💧 None 💨 3 mph H 98%29.88 inHg

11:00 PM

Overcast night

70° 💧 None 💨 9 mph H 97%29.94 inHg

Monday

2:00 AM

Moderate rain

65° 💧 None 💨 9 mph H 96%29.97 inHg

5:00 AM

Overcast night

64° 💧 None 💨 8 mph H 97%30.00 inHg

8:00 AM

Overcast

65° 💧 None 💨 7 mph H 94%30.06 inHg

11:00 AM

Overcast

66° 💧 None 💨 7 mph H 83%30.09 inHg

2:00 PM

Overcast

69° 💧 None 💨 6 mph H 72%30.09 inHg

5:00 PM

Overcast

69° 💧 None 💨 7 mph H 72%30.03 inHg

8:00 PM

Light rain

67° 💧 None 💨 4 mph H 83%30.09 inHg

11:00 PM

Light rain

66° 💧 None 💨 5 mph H 92%30.12 inHg

Tuesday

2:00 AM

Light rain

65° 💧 None 💨 6 mph H 98%30.12 inHg

8:00 AM

Mostly cloudy

66° 💧 None 💨 4 mph H 94%30.03 inHg

2:00 PM

Mostly cloudy

67° 💧 None 💨 6 mph H 88%30.09 inHg

8:00 PM

Overcast night

72° 💧 None 💨 10 mph H 75%30.15 inHg

Wednesday

2:00 AM

Overcast night

66° 💧 None 💨 10 mph H 79%30.21 inHg

8:00 AM

Overcast

62° 💧 None 💨 9 mph H 87%30.30 inHg

2:00 PM

Overcast

61° 💧 None 💨 9 mph H 86%30.36 inHg

8:00 PM

Overcast night

70° 💧 None 💨 9 mph H 64%30.36 inHg

Thursday

2:00 AM

Mostly cloudy night

66° 💧 None 💨 7 mph H 70%30.39 inHg

8:00 AM

Sunny

56° 💧 None 💨 5 mph H 84%30.45 inHg

2:00 PM

Mostly sunny

54° 💧 None 💨 7 mph H 91%30.45 inHg

8:00 PM

Mostly cloudy night

71° 💧 None 💨 7 mph H 53%30.39 inHg

Friday

2:00 AM

Clear night

63° 💧 None 💨 7 mph H 69%30.36 inHg

8:00 AM

Mostly sunny

56° 💧 None 💨 4 mph H 92%30.36 inHg

2:00 PM

Sunny

54° 💧 None 💨 4 mph H 92%30.39 inHg

8:00 PM

Mostly cloudy night

73° 💧 None 💨 4 mph H 51%30.30 inHg

Saturday

2:00 AM

Overcast night

65° 💧 None 💨 4 mph H 70%30.21 inHg

8:00 AM

Overcast

60° 💧 None 💨 5 mph H 92%30.18 inHg

2:00 PM

Partly cloudy

61° 💧 None 💨 5 mph H 97%30.18 inHg

8:00 PM

Mostly cloudy night

78° 💧 None 💨 8 mph H 49%30.06 inHg

Sunday

2:00 AM

Overcast night

73° 💧 None 💨 4 mph H 60%30.03 inHg

8:00 AM

Mostly sunny

64° 💧 None 💨 3 mph H 87%30.03 inHg

2:00 PM

Sunny

62° 💧 None 💨 3 mph H 94%30.03 inHg

8:00 PM

Light rain

81° 💧 None 💨 2 mph H 53%29.97 inHg

Monday

2:00 AM

Clear night

73° 💧 None 💨 3 mph H 73%29.94 inHg

8:00 AM

Mostly sunny

66° 💧 None 💨 2 mph H 89%29.97 inHg

2:00 PM

Sunny

64° 💧 None 💨 6 mph H 91%30.03 inHg

8:00 PM

Mostly clear night

78° 💧 None 💨 6 mph H 57%30.00 inHg

Tuesday

2:00 AM

Clear night

71° 💧 None 💨 5 mph H 63%30.00 inHg

8:00 AM

Mostly cloudy

62° 💧 None 💨 4 mph H 80%30.06 inHg

2:00 PM

Partly cloudy

61° 💧 None 💨 6 mph H 85%30.09 inHg

8:00 PM

Overcast night

79° 💧 None 💨 3 mph H 52%30.03 inHg

Wednesday

2:00 AM

Overcast night

73° 💧 None 💨 8 mph H 57%30.00 inHg

8:00 AM

Overcast

67° 💧 None 💨 4 mph H 84%30.03 inHg

2:00 PM

Overcast

65° 💧 None 💨 4 mph H 89%30.06 inHg

8:00 PM

Mostly cloudy night

79° 💧 None 💨 7 mph H 46%30.03 inHg

Thursday

2:00 AM

Overcast night

70° 💧 None 💨 4 mph H 63%30.00 inHg

In Jefferson and, more broadly, across the state of Maryland: The morning will start with mostly sunny skies and only a few clouds, bringing mild temperatures around 59 degrees. As the day progresses, temperatures will warm up to a comfortable 85 degrees, with light south winds at around 8 mph. Gusts could reach up to 17 mph, but overall, the wind will remain gentle. No precipitation is expected throughout the day, so outdoor activities should be enjoyable. Expect the weather to stay pleasant with plenty of sunshine and minimal cloud cover into the afternoon.

15-Day Weather Outlook for Jefferson

TomorrowTomorrow

Light thunderstorms 91°/67° 💧 None 💨 7 mph

Friday, Sep 18Fri Sep 18

Overcast 84°/73° 💧 None 💨 9 mph

Saturday, Sep 19Sat Sep 19

Partly cloudy 79°/60° 💧 0.209 in 💨 10 mph

Sunday, Sep 20Sun Sep 20

Light thunderstorms 85°/70° 💧 0.313 in 💨 11 mph

Monday, Sep 21Mon Sep 21

Moderate rain 69°/64° 💧 0.355 in 💨 9 mph

Tuesday, Sep 22Tue Sep 22

Light rain 72°/65° 💧 0.047 in 💨 10 mph

Wednesday, Sep 23Wed Sep 23

Overcast 70°/61° 💧 0.045 in 💨 10 mph

Thursday, Sep 24Thu Sep 24

Mostly cloudy 71°/54° 💧 None 💨 7 mph

Friday, Sep 25Fri Sep 25

Mostly sunny 73°/54° 💧 None 💨 7 mph

Saturday, Sep 26Sat Sep 26

Overcast 78°/60° 💧 None 💨 8 mph

Sunday, Sep 27Sun Sep 27

Light rain 81°/62° 💧 0.005 in 💨 4 mph

Monday, Sep 28Mon Sep 28

Mostly sunny 78°/64° 💧 0.008 in 💨 6 mph

Tuesday, Sep 29Tue Sep 29

Mostly cloudy 79°/61° 💧 None 💨 6 mph

Wednesday, Sep 30Wed Sep 30

Overcast 79°/65° 💧 None 💨 8 mph

Thursday, Oct 1Thu Oct 1

Overcast 70°/70° 💧 None 💨 4 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Jefferson

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Jefferson

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 1:00 PM

PM2.5 Fine particles Good 8,0µg/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 10,5µg/m³

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

O₃ Ozone Fair 97,9µg/m³

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

NO₂ Nitrogen dioxide Good 0,8µg/m³

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

Air quality is acceptable for most people.

UV & HEALTH

UV, Sun & Health Outlook in Jefferson

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 6,8High 🙂Fair

Tomorrow UV 7,2High 😐Moderate

Friday UV 5,9Moderate 🙂Fair

Saturday UV 4,0Moderate 😐Moderate

Sunday UV 7,0High 🙂Fair

Monday UV 5,0Moderate —Unavailable

Tuesday UV 5,0Moderate —Unavailable

Hourly UV index today

1:00 PMUV 6,8 2:00 PMUV 6,4 3:00 PMUV 5,1 4:00 PMUV 3,3 5:00 PMUV 1,6 6:00 PMUV 0,5 7:00 PMUV 0,0

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.

Acceptable air quality

Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.

Stay hydrated

Drink water regularly, especially during physical activity or prolonged sun exposure.

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 Jefferson

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · JEFFERSON, MARYLAND

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 4:00 AM–5:00 AM.

99/100Best-hour score

BEST TIME TONIGHT 4:00 AM–5:00 AM Astronomical darkness: 8:48 PM–5:22 AM

☁ Cloud cover 2% Real hourly forecast for the best viewing hour.

☾ Moonlight 30% Waxing Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 83° high at the best hour.

✦ Estimated visible meteors 2–5/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min81%

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.

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Forecast data for Jefferson were last refreshed today at 12:01 PM. The current forecast period extends through 18/09/2026 at 10:00 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.