Climate of South Brazil

The climate of South Brazil, which is located below the Tropic of Capricorn in a temperate zone, is influenced by the system of disturbed circulation of the South, which produces the rains, mainly in the summer. It is also influenced by the system of disturbed circulation of the West, that brings rains and storms, sometimes hail, producing winds with bursts of 60 to 90 km/h (37.3 to 55.9 mph). Regarding temperatures: the winter is cool and the summer is hot. The annual medium temperatures range from 14 to 22 °C (57.2 to 71.6 °F), and in places with altitudes above 1,100 m (3,609 ft), drops to approximately 10 °C (50 °F). Some parts of the southern region also have an oceanic climate.

Climate types of South Region.

In the summer, mainly in January, in the valleys of the rivers Paranapanema, Paraná and Ibicuí-Jacuí, the medium temperature is in excess of 24 °C (75.2 °F), and the medium temperature of the river Uruguay surpasses 26 °C (78.8 °F). The average maximum temperature stays around 24 to 27 °C (75.2 to 80.6 °F) on the elevated surfaces of the plateau and, in the lowest areas, between 30 and 32 °C (86.0 and 89.6 °F).

In the winter, mainly in July, the medium temperature stays relatively low, oscillating between 10 and 15 °C (50 and 59 °F), except for the valleys of the rivers Paranapanema and Paraná, besides the coast of Paraná and Santa Catarina, where the averages are approximately 15 to 18 °C (59.0 to 64.4 °F). The average maximum temperature is also low, around 20 to 24 °C (68.0 to 75.2 °F), in the big valleys and in the coast, and 16 to 20 °C (60.8 to 68.0 °F) in the plateau region. The average minimum temperature varies from 6 to 12 °C (42.8 to 53.6 °F) , and the thermometer frequently registers temperatures near 0 °C or below, accompanied by frost and snow, in consequence of the invasion of polar masses.

The annual medium pluviosity oscillates from 1,250 to 2,000 mm (49.2 to 78.7 in), except along the coast of Paraná and west of Santa Catarina, where the values are in excess of 2,000 mm (78.7 in), and in the north of Paraná and in a small coastal area of Santa Catarina, which have lower recordings down to 1,250 mm (49.2 in). The maximum pluviometric indexes occur in the winter and the minimum in the summer throughout almost the whole area.

Charts of selected cities

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Porto Alegre
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
99
 
 
30
20
 
 
109
 
 
30
21
 
 
104
 
 
28
19
 
 
86
 
 
25
16
 
 
94
 
 
22
13
 
 
132
 
 
19
10
 
 
122
 
 
19
10
 
 
140
 
 
20
11
 
 
140
 
 
22
13
 
 
114
 
 
24
15
 
 
104
 
 
27
17
 
 
102
 
 
29
19
Average max. and min. temperatures in °C
Precipitation totals in mm
Source: [1]
Imperial conversion
JFMAMJJASOND
 
 
3.9
 
 
86
68
 
 
4.3
 
 
86
70
 
 
4.1
 
 
82
66
 
 
3.4
 
 
77
61
 
 
3.7
 
 
72
55
 
 
5.2
 
 
66
50
 
 
4.8
 
 
66
50
 
 
5.5
 
 
68
52
 
 
5.5
 
 
72
55
 
 
4.5
 
 
75
59
 
 
4.1
 
 
81
63
 
 
4
 
 
84
66
Average max. and min. temperatures in °F
Precipitation totals in inches
Florianópolis
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
175
 
 
28
21
 
 
198
 
 
28
22
 
 
185
 
 
27
21
 
 
97
 
 
25
18
 
 
97
 
 
23
16
 
 
76
 
 
21
13
 
 
94
 
 
20
12
 
 
91
 
 
21
14
 
 
127
 
 
21
15
 
 
127
 
 
23
17
 
 
130
 
 
24
18
 
 
147
 
 
26
20
Average max. and min. temperatures in °C
Precipitation totals in mm
Source: [2]
Imperial conversion
JFMAMJJASOND
 
 
6.9
 
 
82
70
 
 
7.8
 
 
82
72
 
 
7.3
 
 
81
70
 
 
3.8
 
 
77
64
 
 
3.8
 
 
73
61
 
 
3
 
 
70
55
 
 
3.7
 
 
68
54
 
 
3.6
 
 
70
57
 
 
5
 
 
70
59
 
 
5
 
 
73
63
 
 
5.1
 
 
75
64
 
 
5.8
 
 
79
68
Average max. and min. temperatures in °F
Precipitation totals in inches
Curitiba
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
165
 
 
26
16
 
 
142
 
 
26
16
 
 
127
 
 
24
15
 
 
89
 
 
22
13
 
 
99
 
 
21
10
 
 
99
 
 
18
8
 
 
89
 
 
19
8
 
 
74
 
 
21
9
 
 
114
 
 
21
11
 
 
135
 
 
22
12
 
 
124
 
 
24
14
 
 
150
 
 
25
15
Average max. and min. temperatures in °C
Precipitation totals in mm
Source: [3]
Imperial conversion
JFMAMJJASOND
 
 
6.5
 
 
79
61
 
 
5.6
 
 
79
61
 
 
5
 
 
75
59
 
 
3.5
 
 
72
55
 
 
3.9
 
 
70
50
 
 
3.9
 
 
64
46
 
 
3.5
 
 
66
46
 
 
2.9
 
 
70
48
 
 
4.5
 
 
70
52
 
 
5.3
 
 
72
54
 
 
4.9
 
 
75
57
 
 
5.9
 
 
77
59
Average max. and min. temperatures in °F
Precipitation totals in inches
São Joaquim
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
168
 
 
23
13
 
 
160
 
 
23
13
 
 
132
 
 
22
12
 
 
107
 
 
18
9
 
 
112
 
 
16
7
 
 
119
 
 
14
6
 
 
140
 
 
14
6
 
 
170
 
 
16
6
 
 
170
 
 
17
7
 
 
152
 
 
19
8
 
 
135
 
 
21
10
 
 
130
 
 
22
12
Average max. and min. temperatures in °C
Precipitation totals in mm
Source: [4]
Imperial conversion
JFMAMJJASOND
 
 
6.6
 
 
73
55
 
 
6.3
 
 
73
55
 
 
5.2
 
 
72
54
 
 
4.2
 
 
64
48
 
 
4.4
 
 
61
45
 
 
4.7
 
 
57
43
 
 
5.5
 
 
57
43
 
 
6.7
 
 
61
43
 
 
6.7
 
 
63
45
 
 
6
 
 
66
46
 
 
5.3
 
 
70
50
 
 
5.1
 
 
72
54
Average max. and min. temperatures in °F
Precipitation totals in inches
Caxias do Sul
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
145
 
 
26
17
 
 
152
 
 
26
17
 
 
206
 
 
24
16
 
 
132
 
 
22
12
 
 
109
 
 
19
11
 
 
152
 
 
17
8
 
 
155
 
 
17
8
 
 
178
 
 
18
9
 
 
203
 
 
19
10
 
 
173
 
 
21
12
 
 
140
 
 
23
13
 
 
170
 
 
26
15
Average max. and min. temperatures in °C
Precipitation totals in mm
Source: [5]
Imperial conversion
JFMAMJJASOND
 
 
5.7
 
 
79
63
 
 
6
 
 
79
63
 
 
8.1
 
 
75
61
 
 
5.2
 
 
72
54
 
 
4.3
 
 
66
52
 
 
6
 
 
63
46
 
 
6.1
 
 
63
46
 
 
7
 
 
64
48
 
 
8
 
 
66
50
 
 
6.8
 
 
70
54
 
 
5.5
 
 
73
55
 
 
6.7
 
 
79
59
Average max. and min. temperatures in °F
Precipitation totals in inches
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