As of 04:48 EDT

Weather in South Lyon, MI

53°

South Lyon, Thursday, 29 October, 04:48

Clear. Feels like 52°. High 72°, low 53°.

Pressure30.09 inHg

Wind8.3 mph SW

Humidity80%

Visibility6.2 mi

Dew point47°

See detailed hourly forecast

Fri, 3059° / 44°

59 °

South Lyon, Friday, 30 October

Overcast. High 59°, low 44°.

Pressure30.36 inHg

Wind6.7 mph NW

Humidity62%

Visibility6.2 mi

Dew point39°

Sat, 3156° / 45°

56 °

South Lyon, Saturday, 31 October

Overcast. High 56°, low 45°.

Pressure30.45 inHg

Wind8 mph SE

Humidity72%

Visibility6.2 mi

Dew point46°

Sun, 0165° / 47°

65 °

South Lyon, Sunday, 1 November

Clear. High 65°, low 47°.

Pressure30.36 inHg

Wind2.9 mph S

Humidity58%

Visibility6.2 mi

Dew point45°

Mon, 0266° / 49°

66 °

South Lyon, Monday, 2 November

Light rain. High 66°, low 49°.

Pressure30.15 inHg

Wind12.8 mph S

Humidity62%

Visibility—

Dew point50°

Tue, 0360° / 55°

0.88

60 °

South Lyon, Tuesday, 3 November

Rain. High 60°, low 55°.

Pressure29.85 inHg

Wind17 mph SW

Humidity97%

Visibility—

Dew point58°

Wed, 0462° / 55°

0.4

62 °

South Lyon, Wednesday, 4 November

Rain. High 62°, low 55°.

Pressure29.94 inHg

Wind13.9 mph SE

Humidity81%

Visibility—

Dew point55°

Thu, 0563° / 59°

0.29

63 °

South Lyon, Thursday, 5 November

Rain. High 63°, low 59°.

Pressure29.65 inHg

Wind12.6 mph SE

Humidity87%

Visibility—

Dew point59°

Fri, 0659° / 43°

2.49

59 °

South Lyon, Friday, 6 November

Heavy rain. High 59°, low 43°.

Pressure29.59 inHg

Wind15.6 mph N

Humidity91%

Visibility—

Dew point55°

Sat, 0746° / 39°

46 °

South Lyon, Saturday, 7 November

Overcast. High 46°, low 39°.

Pressure30.15 inHg

Wind16.9 mph N

Humidity57%

Visibility—

Dew point30°

Sun, 0845° / 34°

45 °

South Lyon, Sunday, 8 November

Clear. High 45°, low 34°.

Pressure30.15 inHg

Wind10.3 mph N

Humidity57%

Visibility—

Dew point29°

Mon, 0948° / 32°

48 °

South Lyon, Monday, 9 November

Partly cloudy. High 48°, low 32°.

Pressure29.97 inHg

Wind7.4 mph NW

Humidity43%

Visibility—

Dew point24°

Tue, 1041° / 38°

0.45

41 °

South Lyon, Tuesday, 10 November

Rain. High 41°, low 38°.

Pressure29.44 inHg

Wind10.7 mph W

Humidity95%

Visibility—

Dew point39°

Wed, 1141° / 37°

0.19

41 °

South Lyon, Wednesday, 11 November

Light rain. High 41°, low 37°.

Pressure29.56 inHg

Wind14.4 mph SW

Humidity96%

Visibility—

Dew point38°

Thu, 1244° / 40°

0.07

44 °

South Lyon, Thursday, 12 November

Light rain. High 44°, low 40°.

Pressure29.71 inHg

Wind15.8 mph SW

Humidity73%

Visibility—

Dew point35°

Fri, 1344° / 42°

44 °

South Lyon, Friday, 13 November

Light rain. High 44°, low 42°.

Pressure29.88 inHg

Wind10.8 mph W

Humidity77%

Visibility—

Dew point37°

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.