Annual mean 20°C · wettest around January · prevailing wind NE
Warmest
27.6 °C
Coldest
20.7 °C
Wettest
66%
Windiest
2.8 m/s
Prevailing
NE
2.5 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 over the whole year is 20°C. January is the hottest month, with highs of about 28°C; July is the coldest, with lows of about 13°C. The rainy (wet) season in São Sebastião runs from October to March, peaking in January with a 62% chance of rain on a given day. The dry season is April to September; July is the driest month, at 19%. Winds in São Sebastião are highest in October, averaging 2.2 m/s (8 km/h), and lightest in June, at 1.5 m/s (5 km/h). The prevailing wind is from the NE. The clearest skies in São Sebastião come in July, when the sky is typically 47% covered; October is the cloudiest month, at 71%.
Month by month São Sebastião 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
28°C
21°C
29°C
62%
66%
1.9 m/s
29
62
9
February
27°C
20°C
29°C
58%
67%
1.9 m/s
33
65
9
March
27°C
20°C
29°C
54%
62%
1.9 m/s
34
68
9
April
25°C
18°C
26°C
37%
62%
1.8 m/s
62
54
26
May
23°C
15°C
23°C
29%
55%
1.6 m/s
76
34
48
June
22°C
14°C
22°C
29%
53%
1.5 m/s
81
24
58
July
21°C
13°C
20°C
19%
47%
1.6 m/s
78
17
65
August
22°C
14°C
21°C
20%
55%
1.9 m/s
76
26
57
September
25°C
16°C
25°C
39%
56%
2.0 m/s
64
48
34
October
25°C
18°C
26°C
42%
71%
2.2 m/s
62
50
29
November
25°C
19°C
26°C
51%
68%
2.2 m/s
62
51
28
December
27°C
20°C
28°C
43%
69%
2.1 m/s
42
63
14
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 weather by season
Year round, São Sebastião has days of about 21°C at their warmest in July, its coolest month, and 28°C in January, its warmest; the coolest hours of the day run from 13°C to 21°C through the year, and the average temperature over the year is 20°C around the clock. Rain is most likely around January 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 weather in winterJune to August
High 22°CLow 13°CRain 23%
Winter in São Sebastião has typical daily highs of about 22°C and lows of about 13°C, with a 23% chance of rain on a given day.
São Sebastião weather in springSeptember to November
High 25°CLow 18°CRain 44%
Spring in São Sebastião has typical daily highs of about 25°C and lows of about 18°C, with a 44% chance of rain on a given day.
São Sebastião weather in summerDecember to February
High 27°CLow 20°CRain 54%
Summer in São Sebastião has typical daily highs of about 27°C and lows of about 20°C, with a 54% chance of rain on a given day.
São Sebastião weather in autumnMarch to May
High 25°CLow 18°CRain 40%
Autumn in São Sebastião has typical daily highs of about 25°C and lows of about 18°C, with a 40% chance of rain on a given day.
When is the rainy season in São Sebastião?
The rainy (wet) season in São Sebastião runs from October to March, peaking in January with a 62% chance of rain on a given day. The dry season is April to September; July is the driest month, at 19%.
What time of year is São Sebastião windiest?
Winds in São Sebastião are highest in October, averaging 2.2 m/s (8 km/h), and lightest in June, at 1.5 m/s (5 km/h). The prevailing wind is from the NE.
What is the average temperature in São Sebastião year round?
The average temperature in São Sebastião over the whole year is 20°C. January is the hottest month, with highs of about 28°C; July is the coldest, with lows of about 13°C.