What is the weather in Potomac right now?

Current weather in Potomac is scattered 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 · 5:39 AM

Potomac Weather & Hourly Forecast

United States · Illinois · 61865

69°F

Partly cloudy night

Feels like: 69°F

💧 Humidity 91% 🌡 Pressure 30.00 inHg 💨 Wind 9 mph 👁 Visibility 12.2 mi ☁ Clouds 42% ☀️ UV index 0.0 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Potomac

Today

6:00 AM

Partly cloudy night

69° 💧 None 💨 9 mph H 91%30.00 inHg

9:00 AM

Partly cloudy

72° 💧 None 💨 9 mph H 73%30.06 inHg

12:00 PM

Mostly cloudy

79° 💧 None 💨 9 mph H 55%30.03 inHg

3:00 PM

Mostly cloudy

82° 💧 None 💨 9 mph H 44%30.00 inHg

6:00 PM

Sunny

78° 💧 None 💨 8 mph H 44%30.00 inHg

9:00 PM

Mostly clear night

70° 💧 None 💨 7 mph H 66%30.06 inHg

Tomorrow

12:00 AM

Clear night

66° 💧 None 💨 6 mph H 79%30.09 inHg

3:00 AM

Clear night

63° 💧 None 💨 6 mph H 84%30.09 inHg

6:00 AM

Clear night

61° 💧 None 💨 6 mph H 90%30.12 inHg

9:00 AM

Mostly sunny

68° 💧 None 💨 8 mph H 75%30.15 inHg

12:00 PM

Sunny

77° 💧 None 💨 10 mph H 52%30.15 inHg

3:00 PM

Partly cloudy

80° 💧 None 💨 8 mph H 47%30.09 inHg

6:00 PM

Sunny

78° 💧 None 💨 8 mph H 50%30.09 inHg

9:00 PM

Clear night

71° 💧 None 💨 6 mph H 66%30.12 inHg

Tuesday

12:00 AM

Mostly cloudy night

67° 💧 None 💨 6 mph H 75%30.15 inHg

3:00 AM

Mostly clear night

64° 💧 None 💨 5 mph H 84%30.12 inHg

Today

6:00 AM

Partly cloudy night

69° 💧 None 💨 9 mph H 91%30.00 inHg

7:00 AM

Sunny

68° 💧 None 💨 9 mph H 86%30.03 inHg

8:00 AM

Sunny

70° 💧 None 💨 9 mph H 79%30.03 inHg

9:00 AM

Partly cloudy

72° 💧 None 💨 9 mph H 73%30.06 inHg

10:00 AM

Mostly cloudy

75° 💧 None 💨 10 mph H 67%30.06 inHg

11:00 AM

Mostly cloudy

77° 💧 None 💨 9 mph H 59%30.06 inHg

12:00 PM

Mostly cloudy

79° 💧 None 💨 9 mph H 55%30.03 inHg

1:00 PM

Mostly cloudy

80° 💧 None 💨 9 mph H 53%30.03 inHg

2:00 PM

Mostly cloudy

82° 💧 None 💨 8 mph H 49%30.03 inHg

3:00 PM

Mostly cloudy

82° 💧 None 💨 9 mph H 44%30.00 inHg

4:00 PM

Sunny

82° 💧 None 💨 11 mph H 41%30.00 inHg

5:00 PM

Sunny

80° 💧 None 💨 10 mph H 38%30.00 inHg

6:00 PM

Sunny

78° 💧 None 💨 8 mph H 44%30.00 inHg

7:00 PM

Sunny

74° 💧 None 💨 6 mph H 53%30.00 inHg

8:00 PM

Clear night

71° 💧 None 💨 7 mph H 60%30.03 inHg

9:00 PM

Mostly clear night

70° 💧 None 💨 7 mph H 66%30.06 inHg

10:00 PM

Clear night

68° 💧 None 💨 6 mph H 72%30.06 inHg

11:00 PM

Clear night

67° 💧 None 💨 6 mph H 76%30.09 inHg

Tomorrow

12:00 AM

Clear night

66° 💧 None 💨 6 mph H 79%30.09 inHg

1:00 AM

Clear night

66° 💧 None 💨 6 mph H 79%30.09 inHg

2:00 AM

Clear night

65° 💧 None 💨 6 mph H 81%30.12 inHg

3:00 AM

Clear night

63° 💧 None 💨 6 mph H 84%30.09 inHg

4:00 AM

Clear night

62° 💧 None 💨 6 mph H 86%30.09 inHg

5:00 AM

Clear night

62° 💧 None 💨 6 mph H 88%30.12 inHg

6:00 AM

Clear night

61° 💧 None 💨 6 mph H 90%30.12 inHg

7:00 AM

Sunny

61° 💧 None 💨 7 mph H 89%30.15 inHg

8:00 AM

Mostly sunny

65° 💧 None 💨 7 mph H 82%30.15 inHg

9:00 AM

Mostly sunny

68° 💧 None 💨 8 mph H 75%30.15 inHg

10:00 AM

Mostly sunny

72° 💧 None 💨 8 mph H 67%30.15 inHg

11:00 AM

Sunny

75° 💧 None 💨 10 mph H 57%30.15 inHg

12:00 PM

Sunny

77° 💧 None 💨 10 mph H 52%30.15 inHg

1:00 PM

Mostly sunny

78° 💧 None 💨 9 mph H 48%30.12 inHg

2:00 PM

Sunny

79° 💧 None 💨 9 mph H 47%30.12 inHg

3:00 PM

Partly cloudy

80° 💧 None 💨 8 mph H 47%30.09 inHg

4:00 PM

Sunny

80° 💧 None 💨 8 mph H 47%30.09 inHg

5:00 PM

Sunny

79° 💧 None 💨 8 mph H 47%30.06 inHg

6:00 PM

Sunny

78° 💧 None 💨 8 mph H 50%30.09 inHg

7:00 PM

Mostly sunny

74° 💧 None 💨 6 mph H 59%30.09 inHg

8:00 PM

Clear night

72° 💧 None 💨 6 mph H 64%30.09 inHg

9:00 PM

Clear night

71° 💧 None 💨 6 mph H 66%30.12 inHg

10:00 PM

Mostly clear night

70° 💧 None 💨 7 mph H 69%30.12 inHg

11:00 PM

Overcast night

68° 💧 None 💨 7 mph H 72%30.12 inHg

Tuesday

12:00 AM

Mostly cloudy night

67° 💧 None 💨 6 mph H 75%30.15 inHg

1:00 AM

Clear night

66° 💧 None 💨 6 mph H 78%30.12 inHg

2:00 AM

Clear night

65° 💧 None 💨 6 mph H 80%30.12 inHg

3:00 AM

Mostly clear night

64° 💧 None 💨 5 mph H 84%30.12 inHg

4:00 AM

Partly cloudy night

63° 💧 None 💨 4 mph H 88%30.12 inHg

5:00 AM

Mostly clear night

62° 💧 None 💨 4 mph H 90%30.12 inHg

6:00 AM

Partly cloudy night

62° 💧 None 💨 5 mph H 91%30.12 inHg

7:00 AM

Partly cloudy

63° 💧 None 💨 5 mph H 90%30.12 inHg

8:00 AM

Partly cloudy

67° 💧 None 💨 3 mph H 83%30.15 inHg

9:00 AM

Partly cloudy

72° 💧 None 💨 3 mph H 74%30.15 inHg

10:00 AM

Mostly cloudy

76° 💧 None 💨 3 mph H 67%30.15 inHg

11:00 AM

Mostly cloudy

80° 💧 None 💨 4 mph H 58%30.15 inHg

12:00 PM

Overcast

83° 💧 None 💨 5 mph H 45%30.12 inHg

1:00 PM

Overcast

85° 💧 None 💨 6 mph H 40%30.09 inHg

2:00 PM

Mostly cloudy

86° 💧 None 💨 7 mph H 37%30.06 inHg

3:00 PM

Mostly sunny

87° 💧 None 💨 7 mph H 36%30.06 inHg

4:00 PM

Sunny

88° 💧 None 💨 7 mph H 35%30.06 inHg

5:00 PM

Sunny

87° 💧 None 💨 6 mph H 35%30.03 inHg

6:00 PM

Sunny

85° 💧 None 💨 4 mph H 41%30.03 inHg

7:00 PM

Sunny

80° 💧 None 💨 4 mph H 47%30.03 inHg

10:00 PM

Clear night

75° 💧 None 💨 5 mph H 56%30.06 inHg

Wednesday

1:00 AM

Partly cloudy night

73° 💧 None 💨 7 mph H 60%30.03 inHg

4:00 AM

Mostly clear night

73° 💧 None 💨 9 mph H 59%30.00 inHg

7:00 AM

Partly cloudy

74° 💧 None 💨 11 mph H 58%30.03 inHg

10:00 AM

Mostly sunny

84° 💧 None 💨 9 mph H 46%30.06 inHg

1:00 PM

Mostly cloudy

89° 💧 None 💨 8 mph H 45%30.03 inHg

4:00 PM

Mostly sunny

88° 💧 None 💨 8 mph H 53%29.97 inHg

7:00 PM

Mostly cloudy

83° 💧 None 💨 9 mph H 69%29.97 inHg

10:00 PM

Overcast night

77° 💧 None 💨 3 mph H 84%29.97 inHg

Thursday

1:00 AM

Light rain

73° 💧 None 💨 5 mph H 97%29.97 inHg

4:00 AM

Overcast night

71° 💧 None 💨 3 mph H 97%29.97 inHg

7:00 AM

Overcast

69° 💧 None 💨 6 mph H 97%29.97 inHg

10:00 AM

Overcast

74° 💧 None 💨 6 mph H 73%30.00 inHg

1:00 PM

Sunny

81° 💧 None 💨 6 mph H 48%29.97 inHg

4:00 PM

Sunny

82° 💧 None 💨 8 mph H 42%29.91 inHg

7:00 PM

Sunny

74° 💧 None 💨 6 mph H 54%29.91 inHg

10:00 PM

Clear night

67° 💧 None 💨 6 mph H 61%29.94 inHg

Friday

1:00 AM

Clear night

62° 💧 None 💨 5 mph H 72%29.97 inHg

4:00 AM

Clear night

59° 💧 None 💨 4 mph H 75%29.94 inHg

7:00 AM

Partly cloudy

59° 💧 None 💨 5 mph H 81%29.94 inHg

10:00 AM

Sunny

72° 💧 None 💨 4 mph H 54%29.94 inHg

1:00 PM

Sunny

79° 💧 None 💨 5 mph H 47%29.88 inHg

4:00 PM

Overcast

81° 💧 None 💨 6 mph H 48%29.83 inHg

7:00 PM

Partly cloudy

75° 💧 None 💨 5 mph H 67%29.83 inHg

Saturday

1:00 AM

Mostly cloudy night

70° 💧 None 💨 8 mph H 77%29.83 inHg

7:00 AM

Light rain

67° 💧 None 💨 11 mph H 95%29.85 inHg

1:00 PM

Light rain

84° 💧 None 💨 12 mph H 67%29.83 inHg

7:00 PM

Mostly cloudy

80° 💧 None 💨 3 mph H 82%29.85 inHg

Sunday

1:00 AM

Mostly cloudy night

76° 💧 None 💨 4 mph H 91%29.91 inHg

7:00 AM

Sunny

74° 💧 None 💨 7 mph H 97%29.94 inHg

1:00 PM

Sunny

91° 💧 None 💨 14 mph H 58%29.91 inHg

7:00 PM

Sunny

86° 💧 None 💨 10 mph H 69%29.88 inHg

Monday

1:00 AM

Clear night

81° 💧 None 💨 8 mph H 78%29.94 inHg

7:00 AM

Sunny

78° 💧 None 💨 9 mph H 81%29.97 inHg

1:00 PM

Mostly sunny

92° 💧 None 💨 11 mph H 53%29.94 inHg

7:00 PM

Sunny

86° 💧 None 💨 9 mph H 65%29.88 inHg

Tuesday

1:00 AM

Partly cloudy night

76° 💧 None 💨 8 mph H 90%29.94 inHg

7:00 AM

Overcast

70° 💧 None 💨 11 mph H 83%30.03 inHg

1:00 PM

Mostly cloudy

75° 💧 None 💨 8 mph H 54%30.09 inHg

7:00 PM

Sunny

69° 💧 None 💨 10 mph H 54%30.12 inHg

Wednesday

1:00 AM

Mostly cloudy night

61° 💧 None 💨 6 mph H 72%30.21 inHg

7:00 AM

Sunny

57° 💧 None 💨 5 mph H 84%30.24 inHg

1:00 PM

Mostly cloudy

73° 💧 None 💨 7 mph H 46%30.24 inHg

7:00 PM

Mostly clear night

69° 💧 None 💨 5 mph H 52%30.18 inHg

Thursday

1:00 AM

Clear night

61° 💧 None 💨 5 mph H 71%30.18 inHg

7:00 AM

Sunny

57° 💧 None 💨 7 mph H 78%30.18 inHg

1:00 PM

Sunny

77° 💧 None 💨 5 mph H 46%30.12 inHg

7:00 PM

Clear night

71° 💧 None 💨 4 mph H 60%30.03 inHg

Friday

1:00 AM

Mostly clear night

64° 💧 None 💨 3 mph H 78%30.03 inHg

7:00 AM

Partly cloudy

61° 💧 None 💨 6 mph H 89%29.94 inHg

1:00 PM

Overcast

74° 💧 None 💨 10 mph H 62%29.88 inHg

7:00 PM

Partly cloudy night

75° 💧 None 💨 4 mph H 67%29.83 inHg

Saturday

1:00 AM

Light rain

69° 💧 None 💨 7 mph H 90%29.88 inHg

7:00 AM

Sunny

57° 💧 None 💨 10 mph H 76%30.00 inHg

1:00 PM

Sunny

69° 💧 None 💨 8 mph H 35%30.06 inHg

7:00 PM

Clear night

64° 💧 None 💨 7 mph H 47%30.06 inHg

Sunday

1:00 AM

Partly cloudy night

59° 💧 None 💨 7 mph H 60%30.15 inHg

7:00 AM

Sunny

52° 💧 None 💨 8 mph H 76%30.21 inHg

1:00 PM

Sunny

65° 💧 None 💨 11 mph H 37%30.27 inHg

7:00 PM

Clear night

58° 💧 None 💨 5 mph H 48%30.27 inHg

In Potomac and, more broadly, across the state of Illinois: This evening will feature a mix of sun and clouds with temperatures remaining quite warm, ranging from 83 to 88 degrees Fahrenheit. Winds will be moderate, coming from the northeast at speeds up to 12 mph, with occasional gusts reaching 25 mph. No rain is expected during the next few hours, so conditions will remain dry. It will be a warm and breezy evening, with the temperature gradually cooling as the night progresses. Overall, you can expect comfortable but warm weather conditions tonight, with no significant weather disturbances.

15-Day Weather Outlook for Potomac

TomorrowTomorrow

Mostly sunny 80°/61° 💧 None 💨 10 mph

Tuesday, Sep 8Tue Sep 8

Mostly sunny 88°/62° 💧 None 💨 7 mph

Wednesday, Sep 9Wed Sep 9

Mostly cloudy 89°/73° 💧 None 💨 11 mph

Thursday, Sep 10Thu Sep 10

Light rain 83°/69° 💧 0.151 in 💨 9 mph

Friday, Sep 11Fri Sep 11

Partly cloudy 81°/59° 💧 None 💨 6 mph

Saturday, Sep 12Sat Sep 12

Light rain 84°/67° 💧 0.362 in 💨 12 mph

Sunday, Sep 13Sun Sep 13

Mostly cloudy 91°/74° 💧 0.008 in 💨 14 mph

Monday, Sep 14Mon Sep 14

Mostly sunny 92°/78° 💧 None 💨 11 mph

Tuesday, Sep 15Tue Sep 15

Overcast 86°/70° 💧 0.044 in 💨 11 mph

Wednesday, Sep 16Wed Sep 16

Mostly cloudy 73°/57° 💧 None 💨 10 mph

Thursday, Sep 17Thu Sep 17

Mostly sunny 77°/57° 💧 None 💨 7 mph

Friday, Sep 18Fri Sep 18

Mostly sunny 74°/61° 💧 0.034 in 💨 10 mph

Saturday, Sep 19Sat Sep 19

Light rain 75°/57° 💧 0.166 in 💨 10 mph

Sunday, Sep 20Sun Sep 20

Partly cloudy 65°/52° 💧 None 💨 11 mph

Monday, Sep 21Mon Sep 21

Sunny 58°/58° 💧 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

Fair

Nearest forecast value 6:00 AM

PM2.5 Fine particles Fair 11,9µg/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 12,2µg/m³

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

O₃ Ozone Good 51,0µg/m³

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

NO₂ Nitrogen dioxide Good 2,2µg/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 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 7,6High 🙂Fair

Tomorrow UV 7,5High 🙂Fair

Tuesday UV 7,4High 😐Moderate

Wednesday UV 7,0High 😐Moderate

Thursday UV 7,0High 😊Good

Friday UV 6,0High —Unavailable

Saturday UV 7,0High —Unavailable

Hourly UV index today

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

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.

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, ILLINOIS

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 2:00 AM–3:00 AM.

100/100Best-hour score

BEST TIME TONIGHT 2:00 AM–3:00 AM Astronomical darkness: 8:49 PM–4:50 AM

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

☾ Moonlight 22% Waning Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 56° 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 min75%

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 Potomac were last refreshed today at 5:39 AM. The current forecast period extends through 08/09/2026 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.