Annual mean 10°C · wettest around March · prevailing wind SW
Warmest
27.2 °C
Coldest
-2.3 °C
Wettest
41%
Windiest
5.6 m/s
Prevailing
SW
4.5 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in South Lyon over the whole year is 10°C. July is the hottest month, with highs of about 27°C; January is the coldest, with lows of about -4°C. South Lyon has no sharply defined rainy season: the chance of rain on a given day runs from 28% in June, the driest month, to 36% in March, the wettest. Winds in South Lyon are highest in February, averaging 4.0 m/s (14 km/h), and lightest in September, at 2.5 m/s (9 km/h). The prevailing wind is from the SW. The clearest skies in South Lyon come in July, when the sky is typically 42% covered; January is the cloudiest month, at 75%.
Month by month South Lyon climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
-2°C
-4°C
-7°C
29%
75%
3.9 m/s
0
0
2
February
1°C
-4°C
-5°C
30%
65%
4.0 m/s
1
0
6
March
6°C
0°C
0°C
36%
60%
4.0 m/s
3
0
18
April
12°C
5°C
7°C
35%
58%
3.9 m/s
17
1
45
May
19°C
12°C
16°C
36%
53%
3.4 m/s
51
12
64
June
25°C
18°C
23°C
28%
45%
3.1 m/s
69
35
47
July
27°C
20°C
27°C
34%
42%
2.7 m/s
55
57
21
August
26°C
19°C
26°C
31%
44%
2.6 m/s
62
52
29
September
23°C
15°C
21°C
29%
47%
2.5 m/s
70
27
57
October
16°C
9°C
12°C
32%
57%
3.1 m/s
36
4
61
November
7°C
3°C
2°C
34%
61%
3.6 m/s
7
0
26
December
2°C
-1°C
-4°C
32%
73%
3.8 m/s
0
0
6
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short South Lyon weather by season
Year round, South Lyon has days of about -2°C at their warmest in January, its coolest month, and 27°C in July, its warmest; the coolest hours of the day run from -4°C to 20°C through the year, and the average temperature over the year is 10°C around the clock. Rain is most likely around March and least likely around June. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
South Lyon weather in winterDecember to February
High 0°CLow -3°CRain 30%
Winter in South Lyon has typical daily highs of about 0°C and lows of about -3°C, with a 30% chance of rain on a given day.
South Lyon weather in springMarch to May
High 12°CLow 6°CRain 36%
Spring in South Lyon has typical daily highs of about 12°C and lows of about 6°C, with a 36% chance of rain on a given day.
South Lyon weather in summerJune to August
High 26°CLow 19°CRain 31%
Summer in South Lyon has typical daily highs of about 26°C and lows of about 19°C, with a 31% chance of rain on a given day.
South Lyon weather in autumnSeptember to November
High 15°CLow 9°CRain 32%
Autumn in South Lyon has typical daily highs of about 15°C and lows of about 9°C, with a 32% chance of rain on a given day.
When is the rainy season in South Lyon?
South Lyon has no sharply defined rainy season: the chance of rain on a given day runs from 28% in June, the driest month, to 36% in March, the wettest.
What time of year is South Lyon windiest?
Winds in South Lyon are highest in February, averaging 4.0 m/s (14 km/h), and lightest in September, at 2.5 m/s (9 km/h). The prevailing wind is from the SW.
What is the average temperature in South Lyon year round?
The average temperature in South Lyon over the whole year is 10°C. July is the hottest month, with highs of about 27°C; January is the coldest, with lows of about -4°C.