As of 17:26 EDT

Weather in South Lyon, MI

65°

South Lyon, Friday, 23 October, 17:26

Clear. Feels like 63°. High 65°, low 43°.

Pressure30.33 inHg

Wind1 mph S

Humidity51%

Visibility6.2 mi

Dew point47°

See detailed hourly forecast

Sat, 2466° / 40°

66 °

South Lyon, Saturday, 24 October

Mostly clear. High 66°, low 40°.

Pressure30.47 inHg

Wind3.9 mph SE

Humidity79%

Visibility6.2 mi

Dew point51°

Sun, 2565° / 41°

65 °

South Lyon, Sunday, 25 October

Overcast. High 65°, low 41°.

Pressure30.45 inHg

Wind4.2 mph SW

Humidity65%

Visibility6.2 mi

Dew point50°

Mon, 2662° / 47°

62 °

South Lyon, Monday, 26 October

Overcast. High 62°, low 47°.

Pressure30.36 inHg

Wind4.4 mph N

Humidity71%

Visibility6.2 mi

Dew point51°

Tue, 2753° / 44°

53 °

South Lyon, Tuesday, 27 October

Overcast. High 53°, low 44°.

Pressure30.42 inHg

Wind6.3 mph E

Humidity60%

Visibility6.2 mi

Dew point37°

Wed, 2859° / 45°

0.02

59 °

South Lyon, Wednesday, 28 October

Light rain. High 59°, low 45°.

Pressure30.21 inHg

Wind9.2 mph SE

Humidity70%

Visibility—

Dew point46°

Thu, 2974° / 52°

0.02

74 °

South Lyon, Thursday, 29 October

Light rain. High 74°, low 52°.

Pressure30.12 inHg

Wind15.1 mph SW

Humidity34%

Visibility—

Dew point41°

Fri, 3061° / 51°

0.01

61 °

South Lyon, Friday, 30 October

Light rain. High 61°, low 51°.

Pressure30.15 inHg

Wind8.8 mph NW

Humidity59%

Visibility—

Dew point45°

Sat, 3154° / 47°

0.22

54 °

South Lyon, Saturday, 31 October

Rain. High 54°, low 47°.

Pressure30.24 inHg

Wind10.2 mph SE

Humidity92%

Visibility—

Dew point49°

Sun, 0159° / 53°

0.1

59 °

South Lyon, Sunday, 1 November

Light rain. High 59°, low 53°.

Pressure30.12 inHg

Wind13.1 mph S

Humidity92%

Visibility—

Dew point54°

Mon, 0259° / 52°

0.5

59 °

South Lyon, Monday, 2 November

Rain. High 59°, low 52°.

Pressure30.27 inHg

Wind14 mph SE

Humidity82%

Visibility—

Dew point53°

Tue, 0363° / 52°

1.06

63 °

South Lyon, Tuesday, 3 November

Heavy rain. High 63°, low 52°.

Pressure29.85 inHg

Wind21.5 mph SW

Humidity92%

Visibility—

Dew point57°

Wed, 0450° / 42°

0.01

50 °

South Lyon, Wednesday, 4 November

Light rain. High 50°, low 42°.

Pressure30.18 inHg

Wind18.5 mph NW

Humidity49%

Visibility—

Dew point30°

Thu, 0557° / 43°

57 °

South Lyon, Thursday, 5 November

Clear. High 57°, low 43°.

Pressure29.91 inHg

Wind18.9 mph W

Humidity43%

Visibility—

Dew point33°

Fri, 0661° / 44°

61 °

South Lyon, Friday, 6 November

Clear. High 61°, low 44°.

Pressure29.88 inHg

Wind8.6 mph W

Humidity54%

Visibility—

Dew point42°

Sat, 0757° / 45°

57 °

South Lyon, Saturday, 7 November

Partly cloudy. High 57°, low 45°.

Pressure30.12 inHg

Wind9.7 mph E

Humidity46%

Visibility—

Dew point35°

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.