Annual mean 19°C · wettest around August · prevailing wind SW
Warmest
30.8 °C
Coldest
12.4 °C
Wettest
64%
Windiest
4.6 m/s
Prevailing
SW
3.8 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
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 James Island over the whole year is 19°C. July is the hottest month, with highs of about 31°C; January is the coldest, with lows of about 7°C. James Island has no sharply defined rainy season: the chance of rain on a given day runs from 60% in April, the driest month, to 63% in August, the wettest. Winds in James Island are highest in March, averaging 3.3 m/s (12 km/h), and lightest in August, at 2.6 m/s (9 km/h). The prevailing wind is from the SW. The clearest skies in James Island come in April, when the sky is typically 33% covered; December is the cloudiest month, at 48%.
Month by month James Island 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
13°C
7°C
10°C
60%
42%
2.7 m/s
24
2
56
February
17°C
10°C
14°C
60%
46%
3.0 m/s
44
5
66
March
19°C
12°C
16°C
60%
42%
3.3 m/s
54
9
67
April
23°C
15°C
21°C
60%
33%
3.3 m/s
71
26
55
May
26°C
20°C
26°C
60%
39%
3.2 m/s
52
53
24
June
29°C
23°C
31°C
62%
41%
3.0 m/s
19
56
4
July
31°C
25°C
34°C
63%
37%
2.7 m/s
4
36
0
August
30°C
25°C
33°C
63%
42%
2.6 m/s
8
42
1
September
28°C
22°C
30°C
62%
41%
2.9 m/s
25
56
9
October
24°C
17°C
24°C
60%
37%
2.7 m/s
61
42
39
November
19°C
12°C
16°C
61%
42%
2.8 m/s
51
12
66
December
15°C
9°C
12°C
62%
48%
2.7 m/s
35
3
62
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 James Island weather by season
Year round, James Island has days of about 13°C at their warmest in January, its coolest month, and 31°C in July, its warmest; the coolest hours of the day run from 7°C to 25°C through the year, and the average temperature over the year is 19°C around the clock. Rain is most likely around August and least likely around April. 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.
James Island weather in winterDecember to February
High 15°CLow 9°CRain 61%
Winter in James Island has typical daily highs of about 15°C and lows of about 9°C, with a 61% chance of rain on a given day.
James Island weather in springMarch to May
High 22°CLow 16°CRain 60%
Spring in James Island has typical daily highs of about 22°C and lows of about 16°C, with a 60% chance of rain on a given day.
James Island weather in summerJune to August
High 30°CLow 24°CRain 63%
Summer in James Island has typical daily highs of about 30°C and lows of about 24°C, with a 63% chance of rain on a given day.
James Island weather in autumnSeptember to November
High 24°CLow 17°CRain 61%
Autumn in James Island has typical daily highs of about 24°C and lows of about 17°C, with a 61% chance of rain on a given day.
When is the rainy season in James Island?
James Island has no sharply defined rainy season: the chance of rain on a given day runs from 60% in April, the driest month, to 63% in August, the wettest.
What time of year is James Island windiest?
Winds in James Island are highest in March, averaging 3.3 m/s (12 km/h), and lightest in August, at 2.6 m/s (9 km/h). The prevailing wind is from the SW.
What is the average temperature in James Island year round?
The average temperature in James Island over the whole year is 19°C. July is the hottest month, with highs of about 31°C; January is the coldest, with lows of about 7°C.