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Current weather in St. Clair is broken clouds.

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

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

Now · 8:59 AM

St. Clair Weather & Hourly Forecast

United States · Michigan · 48079

51°F

Mostly cloudy

Feels like: 44°F

💧 Humidity 75% 🌡 Pressure 30.33 inHg 💨 Wind 9 mph 👁 Visibility 21.3 mi ☁ Clouds 84% ☀️ UV index 0.0 · Low 🌅 Sunrise 7:16 AM 🌇 Sunset 7:28 PM

Hourly Forecast for St. Clair

Today

9:00 AM

Mostly cloudy

51° 💧 None 💨 9 mph H 75%30.33 inHg

12:00 PM

Partly cloudy

59° 💧 None 💨 10 mph H 65%30.33 inHg

3:00 PM

Mostly cloudy

65° 💧 None 💨 12 mph H 51%30.30 inHg

6:00 PM

Mostly sunny

62° 💧 None 💨 11 mph H 59%30.30 inHg

9:00 PM

Clear night

55° 💧 None 💨 12 mph H 67%30.36 inHg

Tomorrow

12:00 AM

Mostly clear night

51° 💧 None 💨 9 mph H 73%30.39 inHg

3:00 AM

Overcast night

53° 💧 None 💨 10 mph H 71%30.39 inHg

6:00 AM

Mostly cloudy night

53° 💧 None 💨 11 mph H 78%30.39 inHg

9:00 AM

Sunny

56° 💧 None 💨 11 mph H 79%30.42 inHg

12:00 PM

Mostly sunny

64° 💧 None 💨 13 mph H 59%30.45 inHg

3:00 PM

Sunny

67° 💧 None 💨 13 mph H 42%30.39 inHg

6:00 PM

Partly cloudy

65° 💧 None 💨 10 mph H 47%30.39 inHg

9:00 PM

Clear night

57° 💧 None 💨 10 mph H 70%30.42 inHg

Thursday

12:00 AM

Clear night

54° 💧 None 💨 10 mph H 79%30.39 inHg

3:00 AM

Clear night

53° 💧 None 💨 9 mph H 80%30.39 inHg

6:00 AM

Clear night

51° 💧 None 💨 8 mph H 87%30.42 inHg

Today

9:00 AM

Mostly cloudy

51° 💧 None 💨 9 mph H 75%30.33 inHg

10:00 AM

Mostly cloudy

54° 💧 None 💨 11 mph H 71%30.33 inHg

11:00 AM

Mostly cloudy

56° 💧 None 💨 11 mph H 68%30.33 inHg

12:00 PM

Partly cloudy

59° 💧 None 💨 10 mph H 65%30.33 inHg

1:00 PM

Mostly cloudy

62° 💧 None 💨 12 mph H 58%30.33 inHg

2:00 PM

Mostly cloudy

64° 💧 None 💨 12 mph H 54%30.30 inHg

3:00 PM

Mostly cloudy

65° 💧 None 💨 12 mph H 51%30.30 inHg

4:00 PM

Partly cloudy

65° 💧 None 💨 11 mph H 53%30.30 inHg

5:00 PM

Mostly sunny

64° 💧 None 💨 11 mph H 57%30.30 inHg

6:00 PM

Mostly sunny

62° 💧 None 💨 11 mph H 59%30.30 inHg

7:00 PM

Mostly sunny

60° 💧 None 💨 9 mph H 64%30.30 inHg

8:00 PM

Clear night

57° 💧 None 💨 11 mph H 69%30.33 inHg

9:00 PM

Clear night

55° 💧 None 💨 12 mph H 67%30.36 inHg

10:00 PM

Clear night

53° 💧 None 💨 11 mph H 65%30.39 inHg

11:00 PM

Mostly clear night

52° 💧 None 💨 10 mph H 69%30.39 inHg

Tomorrow

12:00 AM

Mostly clear night

51° 💧 None 💨 9 mph H 73%30.39 inHg

1:00 AM

Overcast night

51° 💧 None 💨 9 mph H 75%30.39 inHg

2:00 AM

Overcast night

52° 💧 None 💨 9 mph H 72%30.39 inHg

3:00 AM

Overcast night

53° 💧 None 💨 10 mph H 71%30.39 inHg

4:00 AM

Overcast night

53° 💧 None 💨 10 mph H 74%30.39 inHg

5:00 AM

Overcast night

54° 💧 None 💨 11 mph H 75%30.39 inHg

6:00 AM

Mostly cloudy night

53° 💧 None 💨 11 mph H 78%30.39 inHg

7:00 AM

Clear night

52° 💧 None 💨 11 mph H 85%30.42 inHg

8:00 AM

Sunny

52° 💧 None 💨 11 mph H 88%30.42 inHg

9:00 AM

Sunny

56° 💧 None 💨 11 mph H 79%30.42 inHg

10:00 AM

Partly cloudy

59° 💧 None 💨 11 mph H 73%30.42 inHg

11:00 AM

Mostly sunny

62° 💧 None 💨 12 mph H 67%30.45 inHg

12:00 PM

Mostly sunny

64° 💧 None 💨 13 mph H 59%30.45 inHg

1:00 PM

Mostly sunny

66° 💧 None 💨 14 mph H 54%30.42 inHg

2:00 PM

Sunny

66° 💧 None 💨 13 mph H 50%30.39 inHg

3:00 PM

Sunny

67° 💧 None 💨 13 mph H 42%30.39 inHg

4:00 PM

Mostly sunny

67° 💧 None 💨 12 mph H 40%30.39 inHg

5:00 PM

Partly cloudy

67° 💧 None 💨 12 mph H 41%30.39 inHg

6:00 PM

Partly cloudy

65° 💧 None 💨 10 mph H 47%30.39 inHg

7:00 PM

Sunny

62° 💧 None 💨 8 mph H 59%30.39 inHg

8:00 PM

Clear night

60° 💧 None 💨 12 mph H 68%30.39 inHg

9:00 PM

Clear night

57° 💧 None 💨 10 mph H 70%30.42 inHg

10:00 PM

Clear night

55° 💧 None 💨 11 mph H 71%30.42 inHg

11:00 PM

Clear night

54° 💧 None 💨 10 mph H 74%30.42 inHg

Thursday

12:00 AM

Clear night

54° 💧 None 💨 10 mph H 79%30.39 inHg

1:00 AM

Clear night

54° 💧 None 💨 9 mph H 80%30.39 inHg

2:00 AM

Clear night

54° 💧 None 💨 9 mph H 80%30.39 inHg

3:00 AM

Clear night

53° 💧 None 💨 9 mph H 80%30.39 inHg

4:00 AM

Clear night

52° 💧 None 💨 8 mph H 83%30.42 inHg

5:00 AM

Clear night

52° 💧 None 💨 8 mph H 85%30.42 inHg

6:00 AM

Clear night

51° 💧 None 💨 8 mph H 87%30.42 inHg

7:00 AM

Clear night

51° 💧 None 💨 8 mph H 89%30.42 inHg

8:00 AM

Sunny

51° 💧 None 💨 8 mph H 89%30.42 inHg

9:00 AM

Sunny

55° 💧 None 💨 8 mph H 83%30.45 inHg

10:00 AM

Sunny

59° 💧 None 💨 9 mph H 76%30.42 inHg

11:00 AM

Sunny

62° 💧 None 💨 10 mph H 67%30.42 inHg

12:00 PM

Sunny

64° 💧 None 💨 10 mph H 60%30.42 inHg

1:00 PM

Sunny

65° 💧 None 💨 10 mph H 52%30.39 inHg

2:00 PM

Sunny

66° 💧 None 💨 10 mph H 45%30.39 inHg

3:00 PM

Sunny

66° 💧 None 💨 9 mph H 41%30.36 inHg

4:00 PM

Sunny

66° 💧 None 💨 9 mph H 39%30.36 inHg

5:00 PM

Sunny

66° 💧 None 💨 9 mph H 39%30.33 inHg

6:00 PM

Sunny

64° 💧 None 💨 6 mph H 44%30.33 inHg

7:00 PM

Sunny

60° 💧 None 💨 4 mph H 58%30.36 inHg

8:00 PM

Clear night

56° 💧 None 💨 4 mph H 67%30.36 inHg

Friday

5:00 AM

Clear night

47° 💧 None 💨 5 mph H 87%30.36 inHg

8:00 AM

Partly cloudy

46° 💧 None 💨 6 mph H 92%30.39 inHg

11:00 AM

Mostly cloudy

60° 💧 None 💨 7 mph H 63%30.39 inHg

2:00 PM

Partly cloudy

66° 💧 None 💨 6 mph H 47%30.36 inHg

5:00 PM

Sunny

65° 💧 None 💨 7 mph H 54%30.30 inHg

8:00 PM

Clear night

57° 💧 None 💨 5 mph H 81%30.30 inHg

11:00 PM

Clear night

54° 💧 None 💨 4 mph H 90%30.30 inHg

Saturday

2:00 AM

Clear night

52° 💧 None 💨 4 mph H 93%30.30 inHg

5:00 AM

Clear night

49° 💧 None 💨 4 mph H 91%30.27 inHg

8:00 AM

Mostly sunny

48° 💧 None 💨 3 mph H 93%30.27 inHg

11:00 AM

Sunny

64° 💧 None 💨 3 mph H 60%30.27 inHg

2:00 PM

Sunny

70° 💧 None 💨 3 mph H 47%30.24 inHg

5:00 PM

Sunny

69° 💧 None 💨 6 mph H 51%30.18 inHg

8:00 PM

Clear night

59° 💧 None 💨 5 mph H 75%30.18 inHg

11:00 PM

Clear night

54° 💧 None 💨 4 mph H 87%30.18 inHg

Sunday

2:00 AM

Clear night

53° 💧 None 💨 3 mph H 92%30.15 inHg

5:00 AM

Mostly clear night

50° 💧 None 💨 3 mph H 98%30.12 inHg

8:00 AM

Overcast

49° 💧 None 💨 5 mph H 100%30.12 inHg

11:00 AM

Mostly sunny

63° 💧 None 💨 4 mph H 80%30.12 inHg

2:00 PM

Sunny

70° 💧 None 💨 7 mph H 52%30.09 inHg

5:00 PM

Sunny

69° 💧 None 💨 7 mph H 48%30.03 inHg

8:00 PM

Clear night

59° 💧 None 💨 5 mph H 80%30.03 inHg

11:00 PM

Clear night

56° 💧 None 💨 5 mph H 88%30.03 inHg

Monday

2:00 AM

Clear night

54° 💧 None 💨 5 mph H 94%30.00 inHg

8:00 AM

Mostly sunny

55° 💧 None 💨 7 mph H 92%29.97 inHg

2:00 PM

Sunny

54° 💧 None 💨 7 mph H 97%29.97 inHg

8:00 PM

Clear night

71° 💧 None 💨 10 mph H 51%29.94 inHg

Tuesday

2:00 AM

Clear night

60° 💧 None 💨 6 mph H 87%29.94 inHg

8:00 AM

Sunny

57° 💧 None 💨 5 mph H 96%29.94 inHg

2:00 PM

Sunny

55° 💧 None 💨 6 mph H 97%30.00 inHg

8:00 PM

Clear night

73° 💧 None 💨 3 mph H 56%30.00 inHg

Wednesday

2:00 AM

Clear night

62° 💧 None 💨 4 mph H 73%30.00 inHg

8:00 AM

Sunny

57° 💧 None 💨 3 mph H 94%30.06 inHg

2:00 PM

Overcast

52° 💧 None 💨 4 mph H 100%30.12 inHg

8:00 PM

Mostly clear night

75° 💧 None 💨 1 mph H 51%30.12 inHg

Thursday

2:00 AM

Overcast night

65° 💧 None 💨 5 mph H 71%30.12 inHg

8:00 AM

Overcast

58° 💧 None 💨 3 mph H 81%30.18 inHg

2:00 PM

Mostly cloudy

56° 💧 None 💨 3 mph H 87%30.21 inHg

8:00 PM

Overcast night

78° 💧 None 💨 2 mph H 52%30.21 inHg

Friday

2:00 AM

Overcast night

68° 💧 None 💨 4 mph H 81%30.21 inHg

8:00 AM

Overcast

62° 💧 None 💨 4 mph H 92%30.24 inHg

2:00 PM

Overcast

62° 💧 None 💨 4 mph H 97%30.24 inHg

8:00 PM

Overcast night

78° 💧 None 💨 5 mph H 59%30.21 inHg

Saturday

2:00 AM

Mostly cloudy night

70° 💧 None 💨 7 mph H 80%30.15 inHg

8:00 AM

Mostly cloudy

65° 💧 None 💨 3 mph H 92%30.12 inHg

2:00 PM

Sunny

63° 💧 None 💨 4 mph H 99%30.15 inHg

8:00 PM

Clear night

81° 💧 None 💨 7 mph H 56%30.09 inHg

Sunday

2:00 AM

Clear night

71° 💧 None 💨 6 mph H 76%30.06 inHg

8:00 AM

Mostly sunny

69° 💧 None 💨 6 mph H 90%30.00 inHg

2:00 PM

Overcast

68° 💧 None 💨 8 mph H 86%29.97 inHg

8:00 PM

Light rain

68° 💧 None 💨 10 mph H 91%29.91 inHg

Monday

2:00 AM

Overcast night

69° 💧 None 💨 10 mph H 91%29.85 inHg

8:00 AM

Overcast

56° 💧 None 💨 13 mph H 74%30.03 inHg

2:00 PM

Partly cloudy

51° 💧 None 💨 10 mph H 79%30.15 inHg

8:00 PM

Mostly clear night

63° 💧 None 💨 10 mph H 52%30.18 inHg

Tuesday

2:00 AM

Mostly cloudy night

55° 💧 None 💨 5 mph H 74%30.18 inHg

8:00 AM

Mostly sunny

48° 💧 None 💨 4 mph H 88%30.21 inHg

2:00 PM

Overcast

48° 💧 None 💨 7 mph H 81%30.18 inHg

8:00 PM

Overcast night

61° 💧 None 💨 7 mph H 58%30.06 inHg

Wednesday

2:00 AM

Overcast night

55° 💧 None 💨 7 mph H 85%30.03 inHg

In St. Clair and, more broadly, across the state of Michigan: This morning, the sky will be mostly cloudy with cool temperatures ranging from 51 to 58 degrees Fahrenheit. Expect moderate northeast winds, reaching up to 14 mph, with gusts as high as 28 mph. Conditions will remain relatively stable throughout the morning, with no precipitation expected. As the day progresses into the afternoon, the cloud cover will persist, keeping temperatures steady in the same cool range. Winds will continue from the northeast, maintaining speeds around 10 to 14 mph with occasional gusts. Overall, it will be a breezy, overcast day with no rain forecasted, so outdoor plans can proceed without concern for wet conditions.

15-Day Weather Outlook for St. Clair

TomorrowTomorrow

Mostly sunny 67°/51° 💧 None 💨 14 mph

Thursday, Sep 24Thu Sep 24

Sunny 66°/51° 💧 None 💨 10 mph

Friday, Sep 25Fri Sep 25

Mostly cloudy 66°/46° 💧 None 💨 7 mph

Saturday, Sep 26Sat Sep 26

Sunny 69°/49° 💧 None 💨 8 mph

Sunday, Sep 27Sun Sep 27

Mostly sunny 69°/54° 💧 None 💨 11 mph

Monday, Sep 28Mon Sep 28

Mostly sunny 71°/54° 💧 None 💨 10 mph

Tuesday, Sep 29Tue Sep 29

Sunny 73°/55° 💧 None 💨 6 mph

Wednesday, Sep 30Wed Sep 30

Overcast 75°/52° 💧 None 💨 5 mph

Thursday, Oct 1Thu Oct 1

Overcast 78°/56° 💧 None 💨 4 mph

Friday, Oct 2Fri Oct 2

Overcast 78°/62° 💧 None 💨 7 mph

Saturday, Oct 3Sat Oct 3

Mostly cloudy 81°/63° 💧 None 💨 7 mph

Sunday, Oct 4Sun Oct 4

Light rain 69°/68° 💧 0.248 in 💨 10 mph

Monday, Oct 5Mon Oct 5

Overcast 63°/51° 💧 0.084 in 💨 13 mph

Tuesday, Oct 6Tue Oct 6

Overcast 61°/48° 💧 0.023 in 💨 7 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in St. Clair

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for St. Clair

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 9:00 AM

PM2.5 Fine particles Good 1,2µg/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 2,1µg/m³

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

O₃ Ozone Good 55,2µg/m³

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

NO₂ Nitrogen dioxide Good 8,0µg/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 St. Clair

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 5,3Moderate 😊Good

Tomorrow UV 4,5Moderate 🙂Fair

Thursday UV 4,9Moderate 🙂Fair

Friday UV 5,0Moderate 😐Moderate

Saturday UV 5,0Moderate 🙂Fair

Sunday UV 5,0Moderate —Unavailable

Monday UV 6,0High —Unavailable

Hourly UV index today

9:00 AMUV 0,5 10:00 AMUV 1,6 11:00 AMUV 3,0 12:00 PMUV 4,4 1:00 PMUV 5,3 2:00 PMUV 5,3 3:00 PMUV 4,5 4:00 PMUV 3,0 5:00 PMUV 1,5 6:00 PMUV 0,5 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 St. Clair

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · ST. CLAIR, MICHIGAN

Tonight's Stargazing & Shooting Stars

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

91/100Best-hour score

BEST TIME TONIGHT 9:00 PM–10:00 PM Astronomical darkness: 9:02 PM–5:43 AM

☁ Cloud cover 3% Real hourly forecast for the best viewing hour.

☾ Moonlight 86% Waxing Gibbous · Moon about 26° above the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant -9° 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.

DISCOVER WEATHER NEARBY Weather in other cities

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Forecast data for St. Clair were last refreshed today at 8:59 AM. The current forecast period extends through 24/09/2026 at 6:00 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.