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Current weather in Grand Blanc is overcast clouds.

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

Now · 4:28 PM

Grand Blanc Weather & Hourly Forecast

United States · Michigan · 48439

73°F

Overcast

Feels like: 67°F

💧 Humidity 51% 🌡 Pressure 29.94 inHg 💨 Wind 13 mph 👁 Visibility 26.6 mi ☁ Clouds 100% ☀️ UV index 2.7 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Grand Blanc

Today

5:00 PM

Overcast

69° 💧 0.020 in 💨 13 mph H 57%29.97 inHg

8:00 PM

Clear night

60° 💧 None 💨 10 mph H 63%30.03 inHg

11:00 PM

Clear night

56° 💧 None 💨 5 mph H 71%30.12 inHg

Tomorrow

2:00 AM

Clear night

52° 💧 None 💨 4 mph H 81%30.18 inHg

5:00 AM

Clear night

50° 💧 None 💨 4 mph H 87%30.21 inHg

8:00 AM

Sunny

50° 💧 None 💨 4 mph H 86%30.27 inHg

11:00 AM

Sunny

61° 💧 None 💨 6 mph H 60%30.27 inHg

2:00 PM

Sunny

66° 💧 None 💨 2 mph H 49%30.24 inHg

5:00 PM

Mostly sunny

67° 💧 None 💨 2 mph H 46%30.21 inHg

8:00 PM

Overcast night

61° 💧 None 💨 6 mph H 66%30.18 inHg

11:00 PM

Mostly cloudy night

58° 💧 None 💨 9 mph H 71%30.15 inHg

Tuesday

2:00 AM

Overcast night

58° 💧 None 💨 11 mph H 72%30.12 inHg

5:00 AM

Overcast night

60° 💧 None 💨 13 mph H 75%30.09 inHg

8:00 AM

Overcast

61° 💧 0.027 in 💨 17 mph H 74%30.06 inHg

11:00 AM

Light rain

65° 💧 0.012 in 💨 13 mph H 80%30.09 inHg

2:00 PM

Overcast

75° 💧 None 💨 11 mph H 63%30.06 inHg

Today

5:00 PM

Overcast

69° 💧 0.002 in 💨 13 mph H 57%29.97 inHg

6:00 PM

Light rain

65° 💧 0.018 in 💨 13 mph H 68%29.97 inHg

7:00 PM

Sunny

63° 💧 None 💨 13 mph H 59%30.00 inHg

8:00 PM

Clear night

60° 💧 None 💨 10 mph H 63%30.03 inHg

9:00 PM

Clear night

58° 💧 None 💨 7 mph H 68%30.06 inHg

10:00 PM

Clear night

58° 💧 None 💨 8 mph H 68%30.09 inHg

11:00 PM

Clear night

56° 💧 None 💨 5 mph H 71%30.12 inHg

Tomorrow

12:00 AM

Clear night

54° 💧 None 💨 5 mph H 76%30.12 inHg

1:00 AM

Clear night

53° 💧 None 💨 4 mph H 79%30.15 inHg

2:00 AM

Clear night

52° 💧 None 💨 4 mph H 81%30.18 inHg

3:00 AM

Clear night

52° 💧 None 💨 5 mph H 83%30.18 inHg

4:00 AM

Clear night

51° 💧 None 💨 4 mph H 86%30.21 inHg

5:00 AM

Clear night

50° 💧 None 💨 4 mph H 87%30.21 inHg

6:00 AM

Clear night

50° 💧 None 💨 4 mph H 87%30.21 inHg

7:00 AM

Clear night

49° 💧 None 💨 4 mph H 88%30.24 inHg

8:00 AM

Sunny

50° 💧 None 💨 4 mph H 86%30.27 inHg

9:00 AM

Sunny

55° 💧 None 💨 3 mph H 79%30.27 inHg

10:00 AM

Sunny

58° 💧 None 💨 5 mph H 68%30.27 inHg

11:00 AM

Sunny

61° 💧 None 💨 6 mph H 60%30.27 inHg

12:00 PM

Sunny

63° 💧 None 💨 4 mph H 55%30.27 inHg

1:00 PM

Mostly sunny

65° 💧 None 💨 2 mph H 51%30.27 inHg

2:00 PM

Sunny

66° 💧 None 💨 2 mph H 49%30.24 inHg

3:00 PM

Sunny

67° 💧 None 💨 0 mph H 48%30.24 inHg

4:00 PM

Sunny

67° 💧 None 💨 1 mph H 47%30.21 inHg

5:00 PM

Mostly sunny

67° 💧 None 💨 2 mph H 46%30.21 inHg

6:00 PM

Mostly cloudy

67° 💧 None 💨 3 mph H 48%30.18 inHg

7:00 PM

Overcast

64° 💧 None 💨 3 mph H 62%30.18 inHg

8:00 PM

Overcast night

61° 💧 None 💨 6 mph H 66%30.18 inHg

9:00 PM

Partly cloudy night

60° 💧 None 💨 6 mph H 66%30.18 inHg

10:00 PM

Mostly cloudy night

59° 💧 None 💨 9 mph H 69%30.15 inHg

11:00 PM

Mostly cloudy night

58° 💧 None 💨 9 mph H 71%30.15 inHg

Tuesday

12:00 AM

Overcast night

57° 💧 None 💨 9 mph H 73%30.18 inHg

1:00 AM

Overcast night

58° 💧 None 💨 10 mph H 72%30.18 inHg

2:00 AM

Overcast night

58° 💧 None 💨 11 mph H 72%30.12 inHg

3:00 AM

Overcast night

58° 💧 None 💨 11 mph H 71%30.12 inHg

4:00 AM

Overcast night

59° 💧 None 💨 12 mph H 74%30.12 inHg

5:00 AM

Overcast night

60° 💧 None 💨 13 mph H 75%30.09 inHg

6:00 AM

Overcast night

60° 💧 None 💨 15 mph H 75%30.06 inHg

7:00 AM

Mostly cloudy night

60° 💧 None 💨 16 mph H 75%30.06 inHg

8:00 AM

Overcast

61° 💧 None 💨 17 mph H 74%30.06 inHg

9:00 AM

Mostly cloudy

63° 💧 None 💨 13 mph H 73%30.06 inHg

10:00 AM

Light rain

64° 💧 0.027 in 💨 12 mph H 78%30.09 inHg

11:00 AM

Light rain

65° 💧 0.012 in 💨 13 mph H 80%30.09 inHg

12:00 PM

Overcast

70° 💧 None 💨 12 mph H 69%30.09 inHg

1:00 PM

Overcast

74° 💧 None 💨 13 mph H 63%30.06 inHg

2:00 PM

Overcast

75° 💧 None 💨 11 mph H 63%30.06 inHg

3:00 PM

Overcast

78° 💧 None 💨 12 mph H 62%30.03 inHg

4:00 PM

Overcast

79° 💧 None 💨 10 mph H 63%30.03 inHg

5:00 PM

Overcast

78° 💧 None 💨 10 mph H 68%30.03 inHg

6:00 PM

Overcast

77° 💧 0.003 in 💨 8 mph H 74%30.06 inHg

7:00 PM

Light rain

74° 💧 0.011 in 💨 7 mph H 84%30.09 inHg

8:00 PM

Mostly cloudy night

72° 💧 0.002 in 💨 5 mph H 88%30.09 inHg

9:00 PM

Mostly cloudy night

70° 💧 0.001 in 💨 4 mph H 93%30.12 inHg

10:00 PM

Mostly cloudy night

69° 💧 0.003 in 💨 4 mph H 95%30.15 inHg

11:00 PM

Partly cloudy night

69° 💧 None 💨 4 mph H 96%30.15 inHg

Wednesday

12:00 AM

Mostly cloudy night

67° 💧 None 💨 4 mph H 97%30.18 inHg

1:00 AM

Mostly clear night

66° 💧 None 💨 3 mph H 99%30.18 inHg

2:00 AM

Mist at night

65° 💧 None 💨 3 mph H 100%30.21 inHg

3:00 AM

Mist at night

64° 💧 None 💨 4 mph H 100%30.21 inHg

4:00 AM

Fog at night

64° 💧 None 💨 5 mph H 100%30.21 inHg

5:00 AM

Partly cloudy night

63° 💧 None 💨 6 mph H 99%30.27 inHg

6:00 AM

Clear night

61° 💧 None 💨 8 mph H 98%30.30 inHg

7:00 AM

Partly cloudy night

59° 💧 None 💨 8 mph H 97%30.33 inHg

8:00 AM

Mostly cloudy

58° 💧 None 💨 8 mph H 96%30.36 inHg

11:00 AM

Overcast

67° 💧 None 💨 8 mph H 67%30.36 inHg

2:00 PM

Partly cloudy

74° 💧 None 💨 7 mph H 54%30.36 inHg

5:00 PM

Overcast

73° 💧 None 💨 8 mph H 55%30.30 inHg

8:00 PM

Mostly clear night

65° 💧 None 💨 7 mph H 72%30.30 inHg

11:00 PM

Overcast night

60° 💧 None 💨 6 mph H 78%30.30 inHg

Thursday

2:00 AM

Moderate rain

59° 💧 None 💨 7 mph H 89%30.24 inHg

5:00 AM

Moderate rain

60° 💧 None 💨 7 mph H 98%30.18 inHg

8:00 AM

Moderate rain

62° 💧 None 💨 5 mph H 98%30.18 inHg

11:00 AM

Overcast

64° 💧 None 💨 4 mph H 96%30.18 inHg

2:00 PM

Overcast

71° 💧 None 💨 4 mph H 80%30.15 inHg

5:00 PM

Overcast

72° 💧 None 💨 6 mph H 74%30.12 inHg

8:00 PM

Mostly clear night

67° 💧 None 💨 5 mph H 86%30.18 inHg

11:00 PM

Clear night

62° 💧 None 💨 4 mph H 93%30.21 inHg

Friday

2:00 AM

Clear night

57° 💧 None 💨 3 mph H 96%30.21 inHg

5:00 AM

Clear night

56° 💧 None 💨 3 mph H 92%30.21 inHg

8:00 AM

Sunny

57° 💧 None 💨 4 mph H 90%30.27 inHg

11:00 AM

Sunny

67° 💧 None 💨 5 mph H 73%30.27 inHg

2:00 PM

Sunny

72° 💧 None 💨 4 mph H 59%30.24 inHg

5:00 PM

Mostly sunny

72° 💧 None 💨 5 mph H 56%30.18 inHg

8:00 PM

Partly cloudy night

64° 💧 None 💨 6 mph H 76%30.21 inHg

11:00 PM

Partly cloudy night

61° 💧 None 💨 6 mph H 87%30.18 inHg

Saturday

2:00 AM

Overcast night

59° 💧 None 💨 5 mph H 89%30.15 inHg

5:00 AM

Overcast night

59° 💧 None 💨 6 mph H 91%30.15 inHg

8:00 AM

Moderate rain

59° 💧 None 💨 7 mph H 95%30.12 inHg

2:00 PM

Moderate rain

60° 💧 None 💨 8 mph H 98%30.09 inHg

8:00 PM

Overcast night

62° 💧 None 💨 10 mph H 97%30.00 inHg

Sunday

2:00 AM

Overcast night

59° 💧 None 💨 11 mph H 92%30.00 inHg

8:00 AM

Overcast

59° 💧 None 💨 9 mph H 86%30.03 inHg

2:00 PM

Mostly cloudy

72° 💧 None 💨 9 mph H 69%30.00 inHg

8:00 PM

Mostly clear night

67° 💧 None 💨 6 mph H 85%30.00 inHg

Monday

2:00 AM

Overcast night

62° 💧 None 💨 6 mph H 96%30.00 inHg

8:00 AM

Sunny

63° 💧 None 💨 9 mph H 94%29.97 inHg

2:00 PM

Sunny

83° 💧 None 💨 11 mph H 70%29.91 inHg

8:00 PM

Mostly clear night

78° 💧 None 💨 10 mph H 81%29.94 inHg

Tuesday

2:00 AM

Mostly cloudy night

67° 💧 None 💨 6 mph H 96%30.06 inHg

8:00 AM

Mostly cloudy

64° 💧 None 💨 3 mph H 98%30.12 inHg

2:00 PM

Light rain

71° 💧 None 💨 8 mph H 81%30.15 inHg

8:00 PM

Mostly clear night

68° 💧 None 💨 5 mph H 84%30.15 inHg

Wednesday

2:00 AM

Mostly cloudy night

58° 💧 None 💨 6 mph H 94%30.21 inHg

8:00 AM

Sunny

57° 💧 None 💨 5 mph H 97%30.27 inHg

2:00 PM

Mostly sunny

69° 💧 None 💨 9 mph H 57%30.33 inHg

8:00 PM

Clear night

59° 💧 None 💨 10 mph H 77%30.33 inHg

Thursday

2:00 AM

Clear night

53° 💧 None 💨 7 mph H 93%30.36 inHg

8:00 AM

Sunny

50° 💧 None 💨 7 mph H 88%30.45 inHg

2:00 PM

Mostly sunny

65° 💧 None 💨 8 mph H 61%30.42 inHg

8:00 PM

Clear night

58° 💧 None 💨 6 mph H 82%30.36 inHg

Friday

2:00 AM

Clear night

51° 💧 None 💨 5 mph H 94%30.39 inHg

8:00 AM

Sunny

49° 💧 None 💨 7 mph H 96%30.42 inHg

2:00 PM

Sunny

68° 💧 None 💨 6 mph H 56%30.36 inHg

8:00 PM

Clear night

59° 💧 None 💨 5 mph H 83%30.30 inHg

Saturday

2:00 AM

Clear night

51° 💧 None 💨 4 mph H 87%30.30 inHg

8:00 AM

Sunny

52° 💧 None 💨 4 mph H 94%30.30 inHg

2:00 PM

Mostly cloudy

73° 💧 None 💨 7 mph H 57%30.21 inHg

8:00 PM

Overcast night

65° 💧 None 💨 8 mph H 76%30.12 inHg

Sunday

2:00 AM

Overcast night

62° 💧 None 💨 12 mph H 75%30.03 inHg

8:00 AM

Moderate rain

61° 💧 None 💨 13 mph H 85%29.88 inHg

2:00 PM

Light rain

67° 💧 None 💨 10 mph H 91%29.80 inHg

8:00 PM

Mostly clear night

66° 💧 None 💨 6 mph H 86%29.74 inHg

Monday

2:00 AM

Mostly clear night

60° 💧 None 💨 6 mph H 97%29.74 inHg

8:00 AM

Sunny

56° 💧 None 💨 6 mph H 97%29.77 inHg

In Grand Blanc and, more broadly, across the state of Michigan: As the afternoon progresses into the evening, the sky will feature a mix of sun and clouds, with temperatures ranging from 53 to 68 degrees Fahrenheit. There is a possibility of light rain, with an accumulation of around 0.03 inches, especially if conditions become more unsettled. Winds will be coming from the northwest at around 14 mph, with gusts reaching up to 24 mph, which could bring a breezy feel to the evening. Overall, expect mild temperatures and variable skies, with a chance of brief rain showers. It’s a good idea to keep an umbrella handy if you plan to be outdoors later. The weather remains relatively stable, but the breeze and light rain could affect outdoor plans for the rest of the evening.

15-Day Weather Outlook for Grand Blanc

TomorrowTomorrow

Mostly sunny 67°/49° 💧 None 💨 9 mph

Tuesday, Sep 15Tue Sep 15

Overcast 79°/57° 💧 None 💨 17 mph

Wednesday, Sep 16Wed Sep 16

Mostly cloudy 74°/58° 💧 0.057 in 💨 8 mph

Thursday, Sep 17Thu Sep 17

Moderate rain 72°/59° 💧 1.010 in 💨 7 mph

Friday, Sep 18Fri Sep 18

Mostly sunny 72°/56° 💧 None 💨 6 mph

Saturday, Sep 19Sat Sep 19

Moderate rain 62°/59° 💧 0.756 in 💨 10 mph

Sunday, Sep 20Sun Sep 20

Overcast 72°/59° 💧 0.025 in 💨 11 mph

Monday, Sep 21Mon Sep 21

Overcast 83°/62° 💧 0.014 in 💨 11 mph

Tuesday, Sep 22Tue Sep 22

Light rain 71°/64° 💧 0.050 in 💨 8 mph

Wednesday, Sep 23Wed Sep 23

Mostly cloudy 69°/57° 💧 None 💨 10 mph

Thursday, Sep 24Thu Sep 24

Mostly sunny 65°/50° 💧 None 💨 8 mph

Friday, Sep 25Fri Sep 25

Sunny 68°/49° 💧 0.001 in 💨 7 mph

Saturday, Sep 26Sat Sep 26

Mostly cloudy 73°/51° 💧 None 💨 8 mph

Sunday, Sep 27Sun Sep 27

Moderate rain 67°/61° 💧 0.360 in 💨 13 mph

Monday, Sep 28Mon Sep 28

Mostly sunny 60°/56° 💧 0.013 in 💨 6 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Grand Blanc

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Grand Blanc

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 5:00 PM

PM2.5 Fine particles Good 1,6µg/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 1,7µg/m³

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

O₃ Ozone Fair 78,2µg/m³

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

NO₂ Nitrogen dioxide Good 1,1µg/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 Grand Blanc

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 4,5Moderate 🙂Fair

Tomorrow UV 5,7Moderate 🙂Fair

Tuesday UV 2,7Low 🙂Fair

Wednesday UV 2,6Low 🙂Fair

Thursday UV 6,0High 🙂Fair

Friday UV 5,0Moderate —Unavailable

Saturday UV 5,0Moderate —Unavailable

Hourly UV index today

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

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

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

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 Grand Blanc

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · GRAND BLANC, MICHIGAN

Tonight's Stargazing & Shooting Stars

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

100/100Best-hour score

BEST TIME TONIGHT 4:00 AM–5:00 AM Astronomical darkness: 9:25 PM–5:36 AM

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

☾ Moonlight 7% Waxing Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 76° 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 min80%

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 Grand Blanc were last refreshed today at 4:28 PM. The current forecast period extends through 15/09/2026 at 2:00 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.