As of 18:50 EDT

Weather in South Lyon, MI

50°

South Lyon, Friday, 30 October, 18:50

Clear. Feels like 50°. High 56°, low 42°.

Pressure30.39 inHg

Wind3.2 mph N

Humidity69%

Visibility6.2 mi

Dew point40°

See detailed hourly forecast

Sat, 3162° / 42°

62 °

South Lyon, Saturday, 31 October

Overcast. High 62°, low 42°.

Pressure30.45 inHg

Wind6.8 mph SE

Humidity61%

Visibility6.2 mi

Dew point41°

Sun, 0165° / 51°

65 °

South Lyon, Sunday, 1 November

Overcast. High 65°, low 51°.

Pressure30.39 inHg

Wind3.6 mph S

Humidity56%

Visibility6.2 mi

Dew point44°

Mon, 0257° / 48°

0.03

57 °

South Lyon, Monday, 2 November

Light rain. High 57°, low 48°.

Pressure30.30 inHg

Wind6.7 mph S

Humidity95%

Visibility3.9 mi

Dew point52°

Tue, 0367° / 54°

67 °

South Lyon, Tuesday, 3 November

Partly cloudy. High 67°, low 54°.

Pressure30.09 inHg

Wind7.6 mph S

Humidity57%

Visibility6.2 mi

Dew point47°

Wed, 0465° / 57°

0.27

65 °

South Lyon, Wednesday, 4 November

Light rain. High 65°, low 57°.

Pressure29.88 inHg

Wind12.3 mph SE

Humidity78%

Visibility—

Dew point57°

Thu, 0565° / 53°

0.11

65 °

South Lyon, Thursday, 5 November

Light rain. High 65°, low 53°.

Pressure29.94 inHg

Wind11.2 mph S

Humidity57%

Visibility—

Dew point48°

Fri, 0664° / 50°

64 °

South Lyon, Friday, 6 November

Overcast. High 64°, low 50°.

Pressure30.06 inHg

Wind7 mph S

Humidity47%

Visibility—

Dew point41°

Sat, 0766° / 51°

66 °

South Lyon, Saturday, 7 November

Overcast. High 66°, low 51°.

Pressure30.06 inHg

Wind6.8 mph SW

Humidity58%

Visibility—

Dew point49°

Sun, 0866° / 53°

66 °

South Lyon, Sunday, 8 November

Overcast. High 66°, low 53°.

Pressure30.24 inHg

Wind5.6 mph E

Humidity56%

Visibility—

Dew point48°

Mon, 0963° / 51°

63 °

South Lyon, Monday, 9 November

Overcast. High 63°, low 51°.

Pressure30.33 inHg

Wind5.6 mph E

Humidity55%

Visibility—

Dew point45°

Tue, 1063° / 51°

63 °

South Lyon, Tuesday, 10 November

Overcast. High 63°, low 51°.

Pressure30.18 inHg

Wind8.6 mph SE

Humidity44%

Visibility—

Dew point39°

Wed, 1162° / 55°

0.47

62 °

South Lyon, Wednesday, 11 November

Rain. High 62°, low 55°.

Pressure29.91 inHg

Wind6.3 mph W

Humidity79%

Visibility—

Dew point55°

Thu, 1265° / 51°

65 °

South Lyon, Thursday, 12 November

Overcast. High 65°, low 51°.

Pressure29.85 inHg

Wind8.7 mph S

Humidity65%

Visibility—

Dew point51°

Fri, 1362° / 57°

0.19

62 °

South Lyon, Friday, 13 November

Light rain. High 62°, low 57°.

Pressure29.68 inHg

Wind16.4 mph S

Humidity90%

Visibility—

Dew point58°

Sat, 1460° / 49°

0.13

60 °

South Lyon, Saturday, 14 November

Light rain. High 60°, low 49°.

Pressure29.56 inHg

Wind16.2 mph SW

Humidity68%

Visibility—

Dew point44°

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.