Observed 11:55 AM EDT at KPHN

St. Clair, MI weather

Sunny and 59°15°, 8°4° warmer than a typical Oct 24, jacket by 8 PM.

Forecasts agree

Now 59°15°

Sunny

Wind: 3 mph5 km/h; From the north-northeast. Light through 12 AM
Dew point: 41°5°; Comfortable
UV index: 2Low; Moderate 1–3 PM · peak 3
Pressure: 30.49 inHg1033 hPa; Falling slowly · −0.02 inHg−0.6 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

About the same as this time yesterday (57°14° then, 59°15° now)

Good hours for

High 64°18° today at 3 PM
Fog tonight 2–7 AM
Fog tomorrow 8–11 AM
Above 50°10° tomorrow by 10 AM
Fog tomorrow night 2–3 AM

This afternoonUp to 64°18° by 3 PM · Clear
TonightDown to 42°6° by 5 AM · Clear
Tomorrow morningUp to 58°14° by 11 AM · Partly cloudy
Tomorrow afternoonUp to 66°19° by 3 PM · Mostly cloudy
Tomorrow nightDown to 48°9° by 4 AM · Mostly cloudy
Monday morningUp to 58°14° by 11 AM · Mostly cloudy

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 12p	Sunny	58°14° (likely 55°13° to 58°14°)	58°14°	0%	2 mph3 km/h from E, gusts 5 mph8 km/h	64%	0%	2
Sat 1p	Sunny	61°16° (likely 58°14° to 61°16°)	61°16°	0%	2 mph3 km/h from ESE, gusts 6 mph10 km/h	58%	0%	3
Sat 2p	Sunny	62°17° (likely 61°16° to 63°17°)	63°17°	0%	2 mph3 km/h from SSE, gusts 6 mph10 km/h	54%	0%	3
Sat 3p	Sunny	64°18° (likely 62°17° to 64°18°)	64°18°	0%	2 mph3 km/h from SSE, gusts 5 mph9 km/h	50%	1%	2
Sat 4p	Sunny	64°18° (likely 62°17° to 64°18°)	65°18°	0%	2 mph3 km/h from SSE, gusts 5 mph8 km/h	49%	0%	1
Sat 5p	Sunny	64°18° (likely 61°16° to 64°18°)	64°18°	0%	2 mph3 km/h from S, gusts 6 mph9 km/h	50%	0%	1
Sat 6p	Sunny	62°17° (likely 57°14° to 62°17°)	62°17°	0%	2 mph3 km/h from S, gusts 5 mph8 km/h	57%	0%	0
Sat 7p	Clear	58°14° (likely 53°12° to 58°14°)	58°14°	0%	2 mph3 km/h from S, gusts 5 mph8 km/h	63%	0%	0
Sat 8p	Clear	53°12° (likely 50°10° to 53°12°)	53°12°	0%	3 mph5 km/h from SSE, gusts 6 mph10 km/h	79%	0%	0
Sat 9p	Clear	50°10° (likely 47°8° to 50°10°)	50°10°	0%	2 mph3 km/h from SSE, gusts 9 mph15 km/h	88%	0%	0
Sat 10p	Clear	49°9° (likely 45°7° to 49°9°)	49°9°	0%	2 mph3 km/h from SSE, gusts 10 mph16 km/h	91%	0%	0
Sat 11p	Partly cloudy	47°8° (likely 44°7° to 47°8°)	47°8°	0%	2 mph3 km/h from SSE, gusts 9 mph14 km/h	93%	31%	0
Sun 12a	Clear	46°8° (likely 42°6° to 47°8°)	47°8°	0%	2 mph3 km/h from SSE, gusts 8 mph12 km/h	93%	10%	0
Sun 1a	Clear	45°7° (likely 42°6° to 46°8°)	45°7°	0%	1 mph2 km/h from SSE, gusts 8 mph12 km/h	95%	17%	0
Sun 2a	Fog	44°7° (likely 41°5° to 46°8°)	44°7°	0%	1 mph2 km/h from SSE, gusts 6 mph10 km/h	97%	23%	0
Sun 3a	Fog	44°7° (likely 41°5° to 45°7°)	44°7°	0%	1 mph2 km/h from SSE, gusts 4 mph7 km/h	97%	27%	0
Sun 4a	Fog	43°6° (likely 40°4° to 45°7°)	43°6°	0%	1 mph2 km/h from SSE, gusts 4 mph6 km/h	98%	34%	0
Sun 5a	Fog	42°6° (likely 40°4° to 45°7°)	42°6°	0%	1 mph2 km/h from S, gusts 7 mph11 km/h	99%	32%	0
Sun 6a	Fog	42°6° (likely 39°4° to 46°8°)	42°6°	0%	1 mph2 km/h from S, gusts 6 mph10 km/h	97%	29%	0
Sun 7a	Clear	42°6° (likely 39°4° to 46°8°)	42°6°	0%	1 mph2 km/h from S, gusts 7 mph11 km/h	97%	24%	0
Sun 8a	Fog	42°6° (likely 38°3° to 46°8°)	42°6°	0%	2 mph3 km/h from S, gusts 7 mph12 km/h	100%	62%	0
Sun 9a	Fog	47°8° (likely 39°4° to 48°9°)	46°8°	0%	3 mph5 km/h from S, gusts 6 mph9 km/h	93%	64%	0
Sun 10a	Fog	53°12° (likely 44°7° to 54°12°)	53°12°	0%	3 mph5 km/h from S, gusts 8 mph13 km/h	85%	65%	1
Sun 11a	Partly sunny	58°14° (likely 52°11° to 58°14°)	58°14°	0%	5 mph8 km/h from SSW, gusts 13 mph20 km/h	75%	62%	2
Sun 12p	Cloudy	61°16° (likely 58°14° to 61°16°)	61°16°	0%	6 mph10 km/h from SSW, gusts 14 mph23 km/h	66%	66%	3
Sun 1p	Partly sunny	64°18° (likely 62°17° to 64°18°)	64°18°	0%	7 mph11 km/h from SSW, gusts 13 mph21 km/h	59%	57%	4
Sun 2p	Cloudy	65°18° (likely 64°18° to 65°18°)	65°18°	0%	7 mph11 km/h from SSW, gusts 13 mph20 km/h	55%	64%	4
Sun 3p	Partly sunny	66°19° (likely 64°18° to 66°19°)	66°19°	0%	7 mph11 km/h from SSW, gusts 13 mph21 km/h	51%	81%	3
Sun 4p	Mostly sunny	66°19° (likely 63°17° to 67°19°)	66°19°	0%	7 mph11 km/h from SSW, gusts 13 mph20 km/h	49%	58%	2
Sun 5p	Mostly cloudy	66°19° (likely 62°17° to 66°19°)	66°19°	0%	7 mph11 km/h from SSW, gusts 12 mph19 km/h	51%	48%	1
Sun 6p	Sunny	64°18° (likely 59°15° to 64°18°)	64°18°	0%	6 mph10 km/h from S, gusts 10 mph16 km/h	55%	42%	1
Sun 7p	Clear	61°16° (likely 56°13° to 61°16°)	61°16°	0%	5 mph8 km/h from S, gusts 10 mph17 km/h	58%	39%	0
Sun 8p	Cloudy	57°14° (likely 54°12° to 57°14°)	57°14°	0%	5 mph8 km/h from S, gusts 11 mph17 km/h	71%	69%	0
Sun 9p	Partly cloudy	55°13° (likely 53°12° to 55°13°)	55°13°	0%	3 mph5 km/h from S, gusts 11 mph18 km/h	77%	62%	0
Sun 10p	Partly cloudy	54°12° (likely 51°11° to 54°12°)	54°12°	0%	3 mph5 km/h from SSW, gusts 11 mph17 km/h	80%	67%	0
Sun 11p	Partly cloudy	53°12° (likely 51°11° to 53°12°)	53°12°	0%	3 mph5 km/h from SSW, gusts 10 mph16 km/h	82%	72%	0
Mon 12a	Mostly clear	52°11° (likely 49°9° to 52°11°)	52°11°	0%	3 mph5 km/h from SSW, gusts 9 mph15 km/h	84%	60%	0
Mon 1a	Mostly clear	51°11° (likely 48°9° to 51°11°)	51°11°	0%	2 mph3 km/h from SW, gusts 9 mph15 km/h	85%	58%	0
Mon 2a	Fog	50°10° (likely 47°8° to 51°11°)	50°10°	0%	2 mph3 km/h from SW, gusts 9 mph15 km/h	86%	48%	0
Mon 3a	Cloudy	49°9° (likely 47°8° to 50°10°)	49°9°	0%	2 mph3 km/h from SW, gusts 10 mph16 km/h	87%	80%	0
Mon 4a	Cloudy	48°9° (likely 46°8° to 49°9°)	48°9°	0%	2 mph3 km/h from WSW, gusts 10 mph16 km/h	88%	82%	0
Mon 5a	Cloudy	48°9° (likely 45°7° to 48°9°)	48°9°	0%	2 mph3 km/h from W, gusts 9 mph14 km/h	88%	79%	0
Mon 6a	Cloudy	47°8° (likely 46°8° to 47°8°)	47°8°	0%	2 mph3 km/h from W, gusts 8 mph13 km/h	90%	72%	0
Mon 7a	Cloudy	46°8° (likely 45°7° to 49°9°)	47°8°	0%	2 mph3 km/h from WNW, gusts 8 mph12 km/h	91%	64%	0
Mon 8a	Cloudy	48°9° (likely 45°7° to 49°9°)	48°9°	0%	2 mph3 km/h from NW, gusts 7 mph11 km/h	89%	61%	0
Mon 9a	Mostly cloudy	51°11° (likely 46°8° to 53°12°)	50°10°	0%	3 mph5 km/h from NW, gusts 7 mph11 km/h	83%	53%	0
Mon 10a	Partly sunny	55°13° (likely 51°11° to 55°13°)	55°13°	0%	5 mph8 km/h from N, gusts 8 mph13 km/h	75%	56%	1
Mon 11a	Partly sunny	58°14° (likely 57°14° to 59°15°)	58°14°	0%	6 mph10 km/h from N, gusts 10 mph16 km/h	69%	64%	2

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Sunny. High 65°18°, low 42°6°. Typical 57°14° / 43°6°. Dry. Forecasts agree. Best day outdoors this week.
1. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
2. Evening
  6 PM–midnight
  Clear, 53°12°
  Dry
3. Overnight
  midnight–6 AM
  Fog, 42°6°
  Dry
Official NWS forecast
Today: Sunny, with a high near 65. Southeast wind around 2 mph.
Tonight: Patchy fog after 2am. Partly cloudy, with a low around 42. South southeast wind around 3 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
Best day outdoors this week: the one dry, mild day the forecasts agree on (high 65°18°).
High, likely
62°17°–65°18°
Low, likely
34°1°–42°6°
Typical high / low
57°14° / 43°6°
Wind
9 mph14 km/h
UV peak
4
Tomorrow, Oct 25. Fog. High 67°19°, low 46°8°. Typical 56°13° / 43°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Fog, 42°6°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 48°9°
  Dry
Official NWS forecast
Day: Patchy fog before 9am. Partly sunny, with a high near 67. South southwest wind 1 to 7 mph.
Night: Patchy fog after 2am. Mostly cloudy, with a low around 46. Southwest wind 2 to 6 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
64°18°–67°19°
Low, likely
38°3°–46°8°
Typical high / low
56°13° / 43°6°
Wind
9 mph14 km/h, gusts 16 mph25 km/h
UV peak
4
Monday, Oct 26. Cloudy. High 62°17°, low 39°4°. Typical 56°13° / 42°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Mostly cloudy, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 44°7°
  Dry
Official NWS forecast
Day: Patchy fog before 9am. Partly sunny, with a high near 62. North northwest wind 2 to 9 mph.
Night: Mostly cloudy, with a low around 39.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
60°16°–62°17°
Low, likely
39°4°–47°8°
Typical high / low
56°13° / 42°6°
Wind
12 mph20 km/h, gusts 20 mph32 km/h
UV peak
4
Tuesday, Oct 27. Cloudy. High 57°14°, low 39°4°. Typical 56°13° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 57°14°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 46°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly cloudy, with a high near 57.
Night: Mostly cloudy, with a low around 39.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
56°13°–59°15°
Low, likely
38°3°–44°7°
Typical high / low
56°13° / 42°6°
Wind
9 mph14 km/h, gusts 18 mph29 km/h
UV peak
3
Wednesday, Oct 28. Cloudy. High 65°18°, low 49°9°. Typical 55°13° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 52°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 65.
Night: A slight chance of rain after 2am. Partly cloudy, with a low around 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–68°20°
Low, likely
42°6°–49°9°
Typical high / low
55°13° / 42°6°
Wind
11 mph18 km/h, gusts 20 mph32 km/h
UV peak
3
Thursday, Oct 29. Cloudy. High 69°21°, low 44°7°. Typical 55°13° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 69°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 53°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain before 8am. Mostly sunny, with a high near 69.
Night: Partly cloudy, with a low around 44.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
68°20°–70°21°
Low, likely
44°7°–53°12°
Typical high / low
55°13° / 41°5°
Wind
14 mph23 km/h, gusts 26 mph42 km/h
UV peak
3
Friday, Oct 30. Cloudy. High 64°18°, low 44°7°. Typical 54°12° / 41°5°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 51°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 64.
Night: A slight chance of rain after 2am. Partly cloudy, with a low around 44.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
63°17°–72°22°
Low, likely
44°7°–52°11°
Typical high / low
54°12° / 41°5°
Wind
14 mph22 km/h, gusts 22 mph35 km/h
UV peak
3
Saturday, Oct 31. Cloudy. High 65°18°, low 49°9°. Typical 54°12° / 41°5°. Rain 0.01 in0.3 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 51°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 58°14°
  20% chance
4. Overnight
  midnight–6 AM
  Cloudy, 53°12°
  40% chance
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
55°13°–70°21°
Low, likely
37°3°–56°13°
Typical high / low
54°12° / 41°5°
Wind
10 mph17 km/h, gusts 18 mph29 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 66°19°, low 53°12°. Typical 53°12° / 40°4°. Rain 0.15 in3.8 mm, 50% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 53°12°
  40% chance
2. Afternoon
  noon–6 PM
  Cloudy, 66°19°
  50% chance · 0.01 in0.3 mm
3. Evening
  6 PM–midnight
  Drizzle, 61°16°
  40% chance · 0.24 in6.1 mm
4. Overnight
  midnight–6 AM
  Drizzle, 59°15°
  40% chance · 0.16 in4.2 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
58°14°–71°22°
Low, likely
44°7°–59°15°
Typical high / low
53°12° / 40°4°
Wind
22 mph35 km/h, gusts 36 mph58 km/h
Monday, Nov 2. Rain. High 61°16°, low 54°12°. Typical 53°12° / 40°4°. Rain 0.6 in15 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 60°15°
  40% chance · 0.07 in1.7 mm
2. Afternoon
  noon–6 PM
  Drizzle, 62°17°
  40% chance · 0.18 in4.5 mm
3. Evening
  6 PM–midnight
  Rain, 56°13°
  30% chance · 0.25 in6.3 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
58°14°–66°19°
Low, likely
51°11°–59°15°
Typical high / low
53°12° / 40°4°
Wind
17 mph28 km/h, gusts 34 mph55 km/h

10 days15 days30 days

The outlook

Today
Dry, high 65°, low 42°.
Tomorrow
Dry, high 67°, low 46°.
Monday
Dry, high 62°, low 39°, cooling off.
Rest of week
Highs 57–69°; chance of precipitation on Monday.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (DTX) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

St Clair River at St Clair State Police Tidal Gage

1.1 mi

Below flood stage

Level: 576 ft

Reading from Sat 11:36 AM · NWS gauge page

Lake Huron at Fort Gratiot Tidal Gauge

13 mi

Below flood stage

Level: 579 ft

Reading from Sat 11:24 AM · NWS gauge page

St Clair River at Algonac

15 mi

Below flood stage

Level: 575 ft

Reading from Sat 11:24 AM · NWS gauge page

Mill Creek near Avoca

20 mi

Below flood stage

Level: 0.9 ft
Flow: 11 cfs

Reading from Sat 11 AM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 80% less heating than a typical week.

This week 23Typical 114

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 13
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at. About 4 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 41°F).

Open the windows?

Today, 1:00 PM–6:00 PM

Good stretch to open the windows (air quality forecast not available for part of this window).

Is this typical?

PORT HURON · official normals 1991–2020 · records 1931–2026

Oct 24, today vs a typical year

Today’s expected high is 8°4° warmer than typical.

Last 7 days vs normal

On average 4°2° colder than normal (daily mean temperature).

−3°−2°SunOct 18
—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23
—SatOct 24

St. Clair weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 39 min; Losing 2 min 44 s a day; shortest Dec 21, 1 h 38 min less
Golden hour: 5:53–6:51 PM; Morning 7:36–8:33 AM
Blue hour: 6:51–7:02 PM; Morning 7:25–7:36 AM; first light 7:25 AM

Stars tonight? Fair

Mostly clear 7:02–11 PM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 6:05 AM · rises 5:31 PM
Full moon: Oct 26
New moon: Nov 9

Looking west from St. Clair. A level horizon.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

St. Clair, MI weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

St Clair River at St Clair State Police Tidal Gage

Lake Huron at Fort Gratiot Tidal Gauge

St Clair River at Algonac

Mill Creek near Avoca

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Fair

Moon