As of 17:54 EDT

Weather in South Lyon, MI

63°

South Lyon, Saturday, 24 October, 17:54

Partly cloudy. Feels like 62°. High 64°, low 40°.

Pressure30.42 inHg

Wind3 mph E

Humidity65%

Visibility6.2 mi

Dew point51°

See detailed hourly forecast

Sun, 2569° / 41°

69 °

South Lyon, Sunday, 25 October

Overcast. High 69°, low 41°.

Pressure30.45 inHg

Wind4.5 mph S

Humidity69%

Visibility6.2 mi

Dew point51°

Mon, 2664° / 44°

64 °

South Lyon, Monday, 26 October

Partly cloudy. High 64°, low 44°.

Pressure30.36 inHg

Wind3.6 mph N

Humidity72%

Visibility6.2 mi

Dew point51°

Tue, 2755° / 46°

55 °

South Lyon, Tuesday, 27 October

Overcast. High 55°, low 46°.

Pressure30.39 inHg

Wind6 mph E

Humidity55%

Visibility6.2 mi

Dew point37°

Wed, 2866° / 47°

66 °

South Lyon, Wednesday, 28 October

Clear. High 66°, low 47°.

Pressure30.27 inHg

Wind7.9 mph S

Humidity75%

Visibility6.2 mi

Dew point51°

Thu, 2964° / 50°

0.07

64 °

South Lyon, Thursday, 29 October

Light rain. High 64°, low 50°.

Pressure30.12 inHg

Wind10.2 mph W

Humidity74%

Visibility—

Dew point54°

Fri, 3064° / 46°

64 °

South Lyon, Friday, 30 October

Overcast. High 64°, low 46°.

Pressure30.24 inHg

Wind7.2 mph NW

Humidity68%

Visibility—

Dew point51°

Sat, 3174° / 56°

74 °

South Lyon, Saturday, 31 October

Overcast. High 74°, low 56°.

Pressure30.12 inHg

Wind11.1 mph S

Humidity39%

Visibility—

Dew point44°

Sun, 0169° / 59°

0.06

69 °

South Lyon, Sunday, 1 November

Light rain. High 69°, low 59°.

Pressure29.83 inHg

Wind19.3 mph S

Humidity50%

Visibility—

Dew point48°

Mon, 0261° / 46°

1.05

61 °

South Lyon, Monday, 2 November

Rain. High 61°, low 46°.

Pressure29.44 inHg

Wind15.4 mph S

Humidity85%

Visibility—

Dew point51°

Tue, 0347° / 41°

0.96

47 °

South Lyon, Tuesday, 3 November

Rain. High 47°, low 41°.

Pressure29.50 inHg

Wind11.4 mph NW

Humidity86%

Visibility—

Dew point40°

Wed, 0449° / 40°

0.44

49 °

South Lyon, Wednesday, 4 November

Rain. High 49°, low 40°.

Pressure29.68 inHg

Wind15.3 mph SE

Humidity74%

Visibility—

Dew point38°

Thu, 0554° / 40°

54 °

South Lyon, Thursday, 5 November

Clear. High 54°, low 40°.

Pressure30.00 inHg

Wind8.1 mph NW

Humidity59%

Visibility—

Dew point37°

Fri, 0655° / 48°

55 °

South Lyon, Friday, 6 November

Overcast. High 55°, low 48°.

Pressure30.18 inHg

Wind3.5 mph NW

Humidity65%

Visibility—

Dew point42°

Sat, 0753° / 49°

0.03

53 °

South Lyon, Saturday, 7 November

Light rain. High 53°, low 49°.

Pressure30.21 inHg

Wind6.7 mph N

Humidity78%

Visibility—

Dew point46°

Sun, 0858° / 43°

58 °

South Lyon, Sunday, 8 November

Overcast. High 58°, low 43°.

Pressure30.12 inHg

Wind11.6 mph W

Humidity58%

Visibility—

Dew point41°

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for South Lyon, MI are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in South Lyon, MI since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.