Annual mean 18°C · wettest around February · prevailing wind SE
Warmest
28.7 °C
Coldest
14.7 °C
Wettest
74%
Windiest
4.0 m/s
Prevailing
SE
3.4 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 Arroio Grande over the whole year is 18°C. January is the hottest month, with highs of about 28°C; July is the coldest, with lows of about 10°C. The rainy (wet) season in Arroio Grande runs from February, peaking in February with a 65% chance of rain on a given day. The dry season is March to July; July is the driest month, at 36%. Winds in Arroio Grande are highest in October, averaging 3.2 m/s (12 km/h), and lightest in May, at 2.4 m/s (9 km/h). The prevailing wind is from the SE. The clearest skies in Arroio Grande come in December, when the sky is typically 51% covered; September is the cloudiest month, at 65%.
Month by month Arroio Grande 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
49%
56%
2.9 m/s
42
58
13
February
28°C
20°C
29°C
65%
52%
2.7 m/s
39
56
14
March
26°C
19°C
27°C
42%
55%
2.5 m/s
54
51
24
April
23°C
16°C
22°C
50%
60%
2.6 m/s
75
31
50
May
19°C
13°C
18°C
48%
62%
2.4 m/s
66
10
72
June
16°C
10°C
15°C
42%
60%
2.4 m/s
46
5
73
July
15°C
10°C
13°C
36%
62%
2.6 m/s
36
5
70
August
17°C
11°C
15°C
52%
63%
2.8 m/s
45
6
73
September
18°C
13°C
17°C
49%
65%
3.1 m/s
59
7
75
October
21°C
15°C
19°C
56%
60%
3.2 m/s
72
14
67
November
24°C
17°C
23°C
55%
54%
3.2 m/s
70
33
46
December
26°C
19°C
26°C
46%
51%
3.2 m/s
58
46
30
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 Arroio Grande weather by season
Year round, Arroio Grande has days of about 15°C at their warmest in July, its coolest month, and 28°C in January, its warmest; the coolest hours of the day run from 10°C to 21°C through the year, and the average temperature over the year is 18°C around the clock. Rain is most likely around February 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.
Arroio Grande weather in winterJune to August
High 16°CLow 10°CRain 43%
Winter in Arroio Grande has typical daily highs of about 16°C and lows of about 10°C, with a 43% chance of rain on a given day.
Arroio Grande weather in springSeptember to November
High 21°CLow 15°CRain 53%
Spring in Arroio Grande has typical daily highs of about 21°C and lows of about 15°C, with a 53% chance of rain on a given day.
Arroio Grande weather in summerDecember to February
High 27°CLow 20°CRain 53%
Summer in Arroio Grande has typical daily highs of about 27°C and lows of about 20°C, with a 53% chance of rain on a given day.
Arroio Grande weather in autumnMarch to May
High 23°CLow 16°CRain 47%
Autumn in Arroio Grande has typical daily highs of about 23°C and lows of about 16°C, with a 47% chance of rain on a given day.
When is the rainy season in Arroio Grande?
The rainy (wet) season in Arroio Grande runs from February, peaking in February with a 65% chance of rain on a given day. The dry season is March to July; July is the driest month, at 36%.
What time of year is Arroio Grande windiest?
Winds in Arroio Grande are highest in October, averaging 3.2 m/s (12 km/h), and lightest in May, at 2.4 m/s (9 km/h). The prevailing wind is from the SE.
What is the average temperature in Arroio Grande year round?
The average temperature in Arroio Grande over the whole year is 18°C. January is the hottest month, with highs of about 28°C; July is the coldest, with lows of about 10°C.