As of 07:42 EDT

Weather in South Lyon, MI

42°

South Lyon, Friday, 30 October, 07:42

Clear. Feels like 37°. High 59°, low 42°.

Pressure30.30 inHg

Wind7.2 mph NW

Humidity93%

Visibility6.2 mi

Dew point40°

See detailed hourly forecast

Sat, 3158° / 41°

58 °

South Lyon, Saturday, 31 October

Overcast. High 58°, low 41°.

Pressure30.45 inHg

Wind5.4 mph SE

Humidity68%

Visibility6.2 mi

Dew point43°

Sun, 0166° / 48°

66 °

South Lyon, Sunday, 1 November

Overcast. High 66°, low 48°.

Pressure30.39 inHg

Wind2.1 mph S

Humidity57%

Visibility6.2 mi

Dew point44°

Mon, 0266° / 52°

66 °

South Lyon, Monday, 2 November

Overcast. High 66°, low 52°.

Pressure30.24 inHg

Wind5.6 mph S

Humidity57%

Visibility6.2 mi

Dew point49°

Tue, 0371° / 59°

71 °

South Lyon, Tuesday, 3 November

Overcast. High 71°, low 59°.

Pressure29.94 inHg

Wind13.3 mph S

Humidity61%

Visibility—

Dew point54°

Wed, 0466° / 60°

0.06

66 °

South Lyon, Wednesday, 4 November

Light rain. High 66°, low 60°.

Pressure29.80 inHg

Wind11.7 mph S

Humidity65%

Visibility—

Dew point53°

Thu, 0561° / 51°

0.5

61 °

South Lyon, Thursday, 5 November

Rain. High 61°, low 51°.

Pressure29.53 inHg

Wind17.1 mph N

Humidity97%

Visibility—

Dew point57°

Fri, 0651° / 40°

0.02

51 °

South Lyon, Friday, 6 November

Light rain. High 51°, low 40°.

Pressure29.97 inHg

Wind17.8 mph N

Humidity50%

Visibility—

Dew point33°

Sat, 0749° / 35°

49 °

South Lyon, Saturday, 7 November

Overcast. High 49°, low 35°.

Pressure30.36 inHg

Wind6.8 mph S

Humidity49%

Visibility—

Dew point28°

Sun, 0845° / 41°

0.72

45 °

South Lyon, Sunday, 8 November

Rain. High 45°, low 41°.

Pressure30.12 inHg

Wind9.1 mph S

Humidity96%

Visibility—

Dew point41°

Mon, 0958° / 43°

58 °

South Lyon, Monday, 9 November

Mostly clear. High 58°, low 43°.

Pressure30.03 inHg

Wind14.3 mph NW

Humidity53%

Visibility—

Dew point39°

Tue, 1055° / 42°

55 °

South Lyon, Tuesday, 10 November

Clear. High 55°, low 42°.

Pressure30.06 inHg

Wind6.9 mph S

Humidity60%

Visibility—

Dew point40°

Wed, 1159° / 46°

59 °

South Lyon, Wednesday, 11 November

Overcast. High 59°, low 46°.

Pressure29.83 inHg

Wind11.3 mph S

Humidity51%

Visibility—

Dew point39°

Thu, 1264° / 50°

0.1

64 °

South Lyon, Thursday, 12 November

Light rain. High 64°, low 50°.

Pressure29.56 inHg

Wind13.2 mph SW

Humidity66%

Visibility—

Dew point50°

Fri, 1361° / 49°

0.02

61 °

South Lyon, Friday, 13 November

Light rain. High 61°, low 49°.

Pressure30.00 inHg

Wind6.8 mph SW

Humidity45%

Visibility—

Dew point38°

Sat, 1466° / 55°

0.06

66 °

South Lyon, Saturday, 14 November

Light rain. High 66°, low 55°.

Pressure30.06 inHg

Wind11 mph E

Humidity80%

Visibility—

Dew point58°

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.