Observed 3:10 AM EDT at KYIP

South Lyon, MI weather

Foggy and 45°7°.

Forecasts agree

Now 45°7°

Fog

Wind: 3 mph5 km/h; From the northeast. Up to 5 mph8 km/h through 3 PM
Dew point: 43°6°; Comfortable · up to 51°11° by 11 AM
Humidity: 93%; Air 45°7°, dew point 43°6° · fog or dew likely
UV index: 0Low; Moderate 12–5 PM · peak 4
Air quality: 79Moderate; Main pollutant: PM2.5 (fine particles)
Pressure: 30.43 inHg1030 hPa; Steady over the last 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

3°2° cooler than this time yesterday (45°7° then, 42°6° now)

Good hours for

Fog tonight 4–5 AM
Fog today 8–10 AM
Above 50°10° today by 10 AM
Below 50°10° tonight after 9 PM
Fog tomorrow 4–9 AM

TonightNear 43°6° · Partly cloudy
This morningUp to 55°13° by 11 AM · Partly cloudy
This afternoonUp to 64°18° by 3 PM · Clear
TonightDown to 41°5° by 5 AM · Clear
Tomorrow morningUp to 57°14° by 11 AM · Partly cloudy
Tomorrow afternoonUp to 68°20° by 4 PM · Mostly cloudy
Tomorrow nightDown to 48°9° by 2 AM · Partly 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 3a	Mostly clear	44°7° (likely 43°6° to 47°8°)	42°6°	0%	3 mph5 km/h from E, gusts 6 mph10 km/h	100%	25%	0
Sat 4a	Fog	42°6° (likely 42°6° to 46°8°)	41°5°	0%	3 mph5 km/h from E, gusts 6 mph10 km/h	100%	47%	0
Sat 5a	Clear	42°6° (likely 42°6° to 45°7°)	42°6°	0%	2 mph3 km/h from E, gusts 8 mph12 km/h	100%	42%	0
Sat 6a	Clear	42°6° (likely 41°5° to 44°7°)	42°6°	0%	2 mph3 km/h from E, gusts 8 mph12 km/h	99%	41%	0
Sat 7a	Clear	42°6° (likely 39°4° to 43°6°)	42°6°	0%	2 mph3 km/h from ENE, gusts 7 mph11 km/h	97%	41%	0
Sat 8a	Fog	42°6° (likely 40°4° to 43°6°)	42°6°	0%	2 mph3 km/h from E, gusts 7 mph11 km/h	96%	45%	0
Sat 9a	Fog	43°6° (likely 42°6° to 45°7°)	43°6°	0%	2 mph3 km/h from E, gusts 6 mph9 km/h	100%	51%	0
Sat 10a	Partly sunny	50°10° (likely 45°7° to 51°11°)	49°9°	0%	3 mph5 km/h from E, gusts 6 mph10 km/h	100%	39%	1
Sat 11a	Mostly sunny	55°13° (likely 54°12° to 55°13°)	55°13°	0%	3 mph5 km/h from ESE, gusts 7 mph11 km/h	88%	20%	2
Sat 12p	Sunny	58°14° (likely 58°14° to 59°15°)	58°14°	0%	3 mph5 km/h from ESE, gusts 7 mph11 km/h	76%	6%	3
Sat 1p	Sunny	62°17° (likely 60°16° to 62°17°)	62°17°	0%	3 mph5 km/h from SE, gusts 8 mph12 km/h	65%	8%	4
Sat 2p	Sunny	63°17° (likely 62°17° to 64°18°)	63°17°	0%	5 mph8 km/h from SSE, gusts 8 mph13 km/h	59%	7%	4
Sat 3p	Sunny	64°18° (likely 63°17° to 64°18°)	64°18°	0%	5 mph8 km/h from SSE, gusts 8 mph13 km/h	57%	6%	3
Sat 4p	Sunny	64°18° (likely 63°17° to 65°18°)	64°18°	0%	5 mph8 km/h from SSE, gusts 8 mph13 km/h	55%	15%	3
Sat 5p	Sunny	64°18° (likely 62°17° to 64°18°)	64°18°	0%	5 mph8 km/h from SSE, gusts 8 mph12 km/h	54%	41%	2
Sat 6p	Sunny	62°17° (likely 59°15° to 62°17°)	62°17°	0%	3 mph5 km/h from SSE, gusts 8 mph13 km/h	59%	31%	1
Sat 7p	Mostly clear	58°14° (likely 54°12° to 58°14°)	58°14°	0%	5 mph8 km/h from SSE, gusts 8 mph12 km/h	68%	10%	0
Sat 8p	Partly cloudy	52°11° (likely 51°11° to 54°12°)	52°11°	0%	5 mph8 km/h from SSE, gusts 9 mph15 km/h	85%	30%	0
Sat 9p	Mostly clear	49°9° (likely 49°9° to 51°11°)	48°9°	0%	5 mph8 km/h from SSE, gusts 10 mph16 km/h	91%	35%	0
Sat 10p	Mostly clear	48°9° (likely 48°9° to 50°10°)	47°8°	0%	3 mph5 km/h from SSE, gusts 9 mph14 km/h	95%	49%	0
Sat 11p	Clear	46°8° (likely 46°8° to 49°9°)	45°7°	0%	3 mph5 km/h from SSE, gusts 9 mph14 km/h	98%	13%	0
Sun 12a	Clear	45°7° (likely 45°7° to 49°9°)	44°7°	0%	3 mph5 km/h from SSE, gusts 9 mph14 km/h	100%	5%	0
Sun 1a	Clear	45°7° (likely 45°7° to 48°9°)	45°7°	0%	2 mph3 km/h from SSE, gusts 8 mph13 km/h	100%	3%	0
Sun 2a	Clear	44°7° (likely 44°7° to 48°9°)	44°7°	0%	2 mph3 km/h from SSE, gusts 9 mph14 km/h	100%	2%	0
Sun 3a	Clear	43°6° (likely 43°6° to 47°8°)	43°6°	0%	2 mph3 km/h from SSE, gusts 8 mph13 km/h	100%	4%	0
Sun 4a	Fog	42°6° (likely 42°6° to 46°8°)	43°6°	0%	2 mph3 km/h from S, gusts 8 mph14 km/h	100%	49%	0
Sun 5a	Fog	41°5° (likely 41°5° to 46°8°)	41°5°	0%	2 mph3 km/h from S, gusts 9 mph14 km/h	100%	31%	0
Sun 6a	Fog	42°6° (likely 42°6° to 45°7°)	42°6°	0%	2 mph3 km/h from S, gusts 9 mph14 km/h	100%	55%	0
Sun 7a	Fog	41°5° (likely 41°5° to 44°7°)	41°5°	0%	2 mph3 km/h from S, gusts 7 mph12 km/h	100%	57%	0
Sun 8a	Fog	41°5° (likely 41°5° to 45°7°)	41°5°	0%	2 mph3 km/h from S, gusts 8 mph13 km/h	100%	37%	0
Sun 9a	Mostly sunny	44°7° (likely 44°7° to 47°8°)	42°6°	0%	3 mph5 km/h from S, gusts 9 mph14 km/h	99%	53%	0
Sun 10a	Partly sunny	51°11° (likely 50°10° to 53°12°)	51°11°	0%	5 mph8 km/h from S, gusts 9 mph14 km/h	88%	77%	1
Sun 11a	Cloudy	57°14° (likely 56°13° to 59°15°)	57°14°	0%	5 mph8 km/h from SSW, gusts 10 mph17 km/h	76%	65%	2
Sun 12p	Cloudy	61°16° (likely 60°16° to 64°18°)	61°16°	0%	6 mph10 km/h from SSW, gusts 11 mph18 km/h	65%	68%	3
Sun 1p	Cloudy	65°18° (likely 63°17° to 67°19°)	65°18°	0%	7 mph11 km/h from SSW, gusts 11 mph17 km/h	56%	74%	4
Sun 2p	Cloudy	67°19° (likely 65°18° to 68°20°)	67°19°	0%	7 mph11 km/h from SSW, gusts 11 mph17 km/h	52%	72%	4
Sun 3p	Cloudy	67°19° (likely 66°19° to 68°20°)	67°19°	0%	7 mph11 km/h from SSW, gusts 12 mph19 km/h	51%	92%	3
Sun 4p	Cloudy	68°20° (likely 66°19° to 68°20°)	68°20°	0%	7 mph11 km/h from S, gusts 12 mph19 km/h	50%	80%	2
Sun 5p	Sunny	67°19° (likely 65°18° to 67°19°)	67°19°	0%	7 mph11 km/h from SSW, gusts 11 mph18 km/h	51%	45%	2
Sun 6p	Mostly cloudy	65°18° (likely 62°17° to 65°18°)	65°18°	0%	6 mph10 km/h from S, gusts 10 mph16 km/h	54%	66%	1
Sun 7p	Clear	61°16° (likely 58°14° to 61°16°)	61°16°	0%	5 mph8 km/h from S, gusts 8 mph12 km/h	61%	34%	0
Sun 8p	Partly cloudy	56°13° (likely 55°13° to 58°14°)	56°13°	0%	5 mph8 km/h from S, gusts 7 mph12 km/h	73%	61%	0
Sun 9p	Mostly clear	53°12° (likely 53°12° to 57°14°)	53°12°	0%	3 mph5 km/h from S, gusts 6 mph9 km/h	78%	57%	0
Sun 10p	Partly cloudy	51°11° (likely 51°11° to 57°14°)	51°11°	0%	3 mph5 km/h from SSW, gusts 5 mph9 km/h	82%	51%	0
Sun 11p	Partly cloudy	50°10° (likely 49°9° to 56°13°)	50°10°	0%	3 mph5 km/h from SSW, gusts 5 mph8 km/h	84%	55%	0
Mon 12a	Partly cloudy	50°10° (likely 48°9° to 55°13°)	49°9°	0%	3 mph5 km/h from SW, gusts 5 mph8 km/h	85%	52%	0
Mon 1a	Partly cloudy	49°9° (likely 47°8° to 55°13°)	49°9°	0%	2 mph3 km/h from SW, gusts 4 mph7 km/h	86%	37%	0
Mon 2a	Fog	48°9° (likely 46°8° to 54°12°)	48°9°	0%	2 mph3 km/h from SW, gusts 4 mph7 km/h	87%	48%	0

Days ahead

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

Today, Oct 24. Fog. High 65°18°, low 41°5°. Typical 58°14° / 38°3°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Fog, 42°6°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 41°5°
  Dry
Official NWS forecast
Today: Patchy fog before 9am. Mostly sunny, with a high near 65. East southeast wind around 5 mph.
Tonight: Patchy fog. Mostly clear, with a low around 41. East wind around 3 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
63°17°–65°18°
Low, likely
39°4°–43°6°
Typical high / low
58°14° / 38°3°
Wind
7 mph11 km/h, gusts 13 mph22 km/h
UV peak
4
Tomorrow, Oct 25. Fog. High 68°20°, low 44°7°. Typical 58°14° / 38°3°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Mostly sunny, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 48°9°
  Dry
Official NWS forecast
Day: Patchy fog before 9am. Partly sunny, with a high near 68. South southwest wind 2 to 7 mph.
Night: Patchy fog after 2am. Partly cloudy, with a low around 44. Southwest wind 2 to 6 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
66°19°–68°20°
Low, likely
42°6°–44°7°
Typical high / low
58°14° / 38°3°
Wind
8 mph14 km/h, gusts 15 mph23 km/h
UV peak
4
Monday, Oct 26. Cloudy. High 64°18°, low 39°4°. Typical 58°14° / 37°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 47°8°
  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
  Cloudy, 45°7°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Patchy fog before 9am. Mostly sunny, with a high near 64.
Night: Mostly cloudy, with a low around 39.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–68°20°
Low, likely
39°4°–49°9°
Typical high / low
58°14° / 37°3°
Wind
11 mph18 km/h, gusts 19 mph31 km/h
UV peak
4
Tuesday, Oct 27. Mostly cloudy. High 58°14°, low 41°5°. Typical 57°14° / 37°3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 58°15°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly cloudy, with a high near 58.
Night: Mostly cloudy, with a low around 41.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
54°12°–63°17°
Low, likely
41°5°–45°7°
Typical high / low
57°14° / 37°3°
Wind
11 mph17 km/h, gusts 18 mph29 km/h
UV peak
3
Wednesday, Oct 28. Cloudy. High 65°18°, low 48°9°. Typical 57°14° / 37°3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 53°12°
  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 48.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
64°18°–70°21°
Low, likely
45°7°–50°10°
Typical high / low
57°14° / 37°3°
Wind
11 mph18 km/h, gusts 22 mph35 km/h
UV peak
3
Thursday, Oct 29. Rain. High 68°20°, low 42°6°. Typical 56°13° / 36°2°. Rain 0.01 in0.3 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 69°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 48°9°
  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 68.
Night: Partly cloudy, with a low around 42.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
68°20°–73°23°
Low, likely
42°6°–54°12°
Typical high / low
56°13° / 36°2°
Wind
12 mph20 km/h, gusts 31 mph50 km/h
UV peak
3
Friday, Oct 30. Partly sunny. High 65°18°, low 47°8°. Typical 56°13° / 36°2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 65.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
61°16°–74°23°
Low, likely
38°3°–53°12°
Typical high / low
56°13° / 36°2°
Wind
9 mph15 km/h, gusts 30 mph48 km/h
Saturday, Oct 31. Drizzle. High 67°19°, low 51°11°. Typical 55°13° / 36°2°. Rain 0.04 in1 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 59°15°
  20% chance
4. Overnight
  midnight–6 AM
  Showers, 54°12°
  30% chance · 0.1 in2.4 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
59°15°–72°22°
Low, likely
48°9°–56°13°
Typical high / low
55°13° / 36°2°
Wind
11 mph18 km/h, gusts 22 mph36 km/h
UV peak
1
Sunday, Nov 1. Showers. High 66°19°, low 54°12°. Typical 55°13° / 35°2°. Rain 0.35 in8.9 mm, 50% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 54°12°
  40% chance · 0.05 in1.4 mm
2. Afternoon
  noon–6 PM
  Drizzle, 66°19°
  50% chance · 0.04 in0.9 mm
3. Evening
  6 PM–midnight
  Drizzle, 60°16°
  40% chance · 0.21 in5.2 mm
4. Overnight
  midnight–6 AM
  Cloudy, 58°14°
  40% chance · 0.16 in4.1 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
59°15°–72°22°
Low, likely
50°10°–58°14°
Typical high / low
55°13° / 35°2°
Wind
21 mph33 km/h, gusts 34 mph55 km/h
UV peak
1
Monday, Nov 2. Cloudy. High 60°16°, low 47°8°. Typical 54°12° / 35°2°. Rain 0.38 in9.7 mm, 40% chance. Mostly agree.
1. Morning
  6 AM–noon
  Drizzle, 57°14°
  40% chance · 0.06 in1.6 mm
2. Afternoon
  noon–6 PM
  Drizzle, 58°14°
  30% chance · 0.14 in3.5 mm
3. Evening
  6 PM–midnight
  Cloudy, 47°8°
  30% chance · 0.08 in2 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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
58°14°–61°16°
Low, likely
40°4°–50°10°
Typical high / low
54°12° / 35°2°
Wind
18 mph30 km/h, gusts 39 mph63 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 65°, low 41°.
Tomorrow
Dry, high 68°, low 44°, warming up.
Monday
Dry, high 64°, low 39°, cooling off.
Rest of week
Highs 58–68°; chance of precipitation on Sunday.

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

Huron River at Hamburg

7.5 mi

Below flood stage

Level: 4.1 ft
Flow: 4 cfs

Reading from Sat 2 AM · NWS gauge page

Huron River at Ann Arbor

13 mi

Below flood stage

Level: 12.0 ft
Flow: 170 cfs

Reading from Sat 1:45 AM · NWS gauge page

Mill Creek near Dexter

17 mi

Below flood stage

Level: 6.0 ft
Flow: 50 cfs

Reading from Sat 1:45 AM · NWS gauge page

Rouge River at Southfield

18 mi

Below flood stage

Level: 4.1 ft
Flow: 32 cfs

Reading from Sat 1:30 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 25Typical 126

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 17
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 10 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 43°F).

Open the windows?

Today, 1:00 PM–6:00 PM

Good stretch to open the windows.

Is this typical?

ANN ARBOR U OF MICH · official normals 1991–2020 · records 1881–2026

Oct 24, today vs a typical year

Today’s expected high is 7°4° warmer than typical.

Last 7 days vs normal

On average 1°0° colder than normal (daily mean temperature).

−5°−3°SunOct 18
−2°−1°MonOct 19
+1°TueOct 20
+1°±0°WedOct 21
+3°+2°ThuOct 22
—FriOct 23
—SatOct 24

South Lyon weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 40 min; Losing 2 min 39 s a day; shortest Dec 21, 1 h 36 min less
Golden hour: 5:59–6:56 PM; Morning 7:40–8:37 AM
Blue hour: 6:56–7:07 PM; Morning 7:29–7:40 AM; first light 7:29 AM

Stars tonight? Poor

Clouds most of the night (about 39% cover).

Moon

Waxing gibbous

96% lit · growing

Today: sets 6:09 AM · rises 5:36 PM
Full moon: Oct 26
New moon: Nov 9

Looking southwest from South Lyon. The highest point on the skyline is about 2,700 ft, 11 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

South Lyon, MI weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Huron River at Hamburg

Huron River at Ann Arbor

Mill Creek near Dexter

Rouge River at Southfield

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? Poor

Moon