As of 04:45 EDT

Weather in South Lyon, MI

47°

South Lyon, Tuesday, 27 October, 04:45

Overcast. Feels like 47°. High 66°, low 43°.

Pressure30.36 inHg

Wind1 mph E

Humidity84%

Visibility6.2 mi

Dew point42°

See detailed hourly forecast

Wed, 2873° / 44°

0.01

73 °

South Lyon, Wednesday, 28 October

Light rain. High 73°, low 44°.

Pressure30.24 inHg

Wind4.9 mph S

Humidity70%

Visibility6.2 mi

Dew point53°

Thu, 2969° / 53°

0.01

69 °

South Lyon, Thursday, 29 October

Light rain. High 69°, low 53°.

Pressure30.03 inHg

Wind10.5 mph SW

Humidity61%

Visibility6.2 mi

Dew point52°

Fri, 3058° / 43°

58 °

South Lyon, Friday, 30 October

Overcast. High 58°, low 43°.

Pressure30.33 inHg

Wind5.5 mph NW

Humidity64%

Visibility6.2 mi

Dew point42°

Sat, 3159° / 50°

59 °

South Lyon, Saturday, 31 October

Overcast. High 59°, low 50°.

Pressure30.33 inHg

Wind6.3 mph SE

Humidity65%

Visibility—

Dew point46°

Sun, 0164° / 46°

0.11

64 °

South Lyon, Sunday, 1 November

Light rain. High 64°, low 46°.

Pressure30.24 inHg

Wind6 mph E

Humidity52%

Visibility—

Dew point44°

Mon, 0257° / 52°

0.56

57 °

South Lyon, Monday, 2 November

Rain. High 57°, low 52°.

Pressure29.83 inHg

Wind14.6 mph NE

Humidity97%

Visibility—

Dew point55°

Tue, 0352° / 44°

0.01

52 °

South Lyon, Tuesday, 3 November

Light rain. High 52°, low 44°.

Pressure30.24 inHg

Wind14.4 mph NE

Humidity73%

Visibility—

Dew point43°

Wed, 0452° / 39°

52 °

South Lyon, Wednesday, 4 November

Overcast. High 52°, low 39°.

Pressure30.12 inHg

Wind9.2 mph E

Humidity66%

Visibility—

Dew point39°

Thu, 0552° / 50°

0.59

52 °

South Lyon, Thursday, 5 November

Rain. High 52°, low 50°.

Pressure29.77 inHg

Wind10.5 mph N

Humidity96%

Visibility—

Dew point51°

Fri, 0644° / 36°

44 °

South Lyon, Friday, 6 November

Overcast. High 44°, low 36°.

Pressure30.03 inHg

Wind14.6 mph N

Humidity57%

Visibility—

Dew point28°

Sat, 0746° / 31°

46 °

South Lyon, Saturday, 7 November

Clear. High 46°, low 31°.

Pressure30.24 inHg

Wind5.9 mph N

Humidity46%

Visibility—

Dew point24°

Sun, 0853° / 37°

53 °

South Lyon, Sunday, 8 November

Mostly clear. High 53°, low 37°.

Pressure30.18 inHg

Wind8.9 mph SW

Humidity39%

Visibility—

Dew point26°

Mon, 0956° / 42°

56 °

South Lyon, Monday, 9 November

Overcast. High 56°, low 42°.

Pressure30.24 inHg

Wind10.5 mph S

Humidity46%

Visibility—

Dew point33°

Tue, 1055° / 52°

0.32

55 °

South Lyon, Tuesday, 10 November

Rain. High 55°, low 52°.

Pressure29.97 inHg

Wind11.5 mph SW

Humidity90%

Visibility—

Dew point51°

Wed, 1157° / 50°

0.31

57 °

South Lyon, Wednesday, 11 November

Rain. High 57°, low 50°.

Pressure29.65 inHg

Wind18.2 mph SW

Humidity81%

Visibility—

Dew point50°

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.