Annual mean 18°C · wettest around October · prevailing wind W
Warmest
27.2 °C
Coldest
15.3 °C
Wettest
80%
Windiest
3.6 m/s
Prevailing
W
3.2 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 São Sebastião do Caí over the whole year is 18°C. January is the hottest month, with highs of about 27°C; July is the coldest, with lows of about 11°C. São Sebastião do Caí has no sharply defined rainy season: the chance of rain on a given day runs from 39% in July, the driest month, to 57% in October, the wettest. Winds in São Sebastião do Caí are highest in January, averaging 3.1 m/s (11 km/h), and lightest in May, at 2.4 m/s (9 km/h). The prevailing wind is from the W. The clearest skies in São Sebastião do Caí come in February, when the sky is typically 50% covered; September is the cloudiest month, at 66%.
Month by month São Sebastião do Caí 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
27°C
20°C
28°C
53%
53%
3.1 m/s
46
54
17
February
27°C
19°C
27°C
41%
50%
2.8 m/s
47
55
20
March
25°C
19°C
26°C
44%
57%
2.7 m/s
58
48
29
April
22°C
16°C
22°C
39%
57%
2.6 m/s
73
29
53
May
18°C
13°C
17°C
50%
58%
2.4 m/s
63
10
72
June
16°C
11°C
15°C
48%
61%
2.6 m/s
47
6
71
July
16°C
11°C
14°C
39%
56%
2.6 m/s
46
5
70
August
18°C
12°C
16°C
50%
55%
2.7 m/s
54
9
70
September
20°C
14°C
18°C
54%
66%
3.0 m/s
66
13
69
October
21°C
15°C
20°C
57%
62%
3.1 m/s
72
18
63
November
24°C
17°C
23°C
44%
54%
3.1 m/s
71
34
46
December
26°C
19°C
26°C
44%
54%
3.1 m/s
55
48
29
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 São Sebastião do Caí weather by season
Year round, São Sebastião do Caí has days of about 16°C at their warmest in July, its coolest month, and 27°C in January, its warmest; the coolest hours of the day run from 11°C to 20°C through the year, and the average temperature over the year is 18°C around the clock. Rain is most likely around October and least likely around July. 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.
São Sebastião do Caí weather in winterJune to August
High 17°CLow 11°CRain 45%
Winter in São Sebastião do Caí has typical daily highs of about 17°C and lows of about 11°C, with a 45% chance of rain on a given day.
São Sebastião do Caí weather in springSeptember to November
High 21°CLow 15°CRain 52%
Spring in São Sebastião do Caí has typical daily highs of about 21°C and lows of about 15°C, with a 52% chance of rain on a given day.
São Sebastião do Caí weather in summerDecember to February
High 27°CLow 19°CRain 46%
Summer in São Sebastião do Caí has typical daily highs of about 27°C and lows of about 19°C, with a 46% chance of rain on a given day.
São Sebastião do Caí weather in autumnMarch to May
High 22°CLow 16°CRain 44%
Autumn in São Sebastião do Caí has typical daily highs of about 22°C and lows of about 16°C, with a 44% chance of rain on a given day.
When is the rainy season in São Sebastião do Caí?
São Sebastião do Caí has no sharply defined rainy season: the chance of rain on a given day runs from 39% in July, the driest month, to 57% in October, the wettest.
What time of year is São Sebastião do Caí windiest?
Winds in São Sebastião do Caí are highest in January, averaging 3.1 m/s (11 km/h), and lightest in May, at 2.4 m/s (9 km/h). The prevailing wind is from the W.
What is the average temperature in São Sebastião do Caí year round?
The average temperature in São Sebastião do Caí over the whole year is 18°C. January is the hottest month, with highs of about 27°C; July is the coldest, with lows of about 11°C.