Rosario monthly weather forecast
Monthly weather forecast for Rosario. ℃ Average temperatures % Humidity, precipitation ️ Sunrise and sunset ️ Wind direction and speed
31 August 2026, Monday
+12°C / +21°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+14°C
12.1
82%
1010
01:00
+14°C
12.8
87%
1010
02:00
+13°C
6.3
91%
1011
03:00
+12°C
8.1
93%
1010
04:00
+12°C
9.4
94%
1009
05:00
+12°C
9.2
95%
1009
06:00
+12°C
8.8
96%
1010
07:00
+12°C
7.8
97%
1010
08:00
+12°C
10
97%
1010
09:00
+13°C
10.2
94%
1011
10:00
+16°C
9
86%
1012
11:00
+18°C
7.6
78%
1012
12:00
+19°C
2.8
74%
1012
13:00
+20°C
5.7
70%
1012
14:00
+21°C
5.9
66%
1012
15:00
+21°C
11
66%
1011
16:00
+21°C
13.4
65%
1011
17:00
+21°C
13
65%
1011
18:00
+20°C
7.5
69%
1012
19:00
+18°C
6.1
79%
1013
20:00
+17°C
7.3
83%
1014
21:00
+16°C
6.1
87%
1015
22:00
+16°C
11.6
86%
1016
23:00
+15°C
10.3
86%
1017
01 September 2026, Tuesday
+10°C / +21°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+14°C
6.3
90%
1017
01:00
+14°C
8.1
92%
1017
02:00
+13°C
7.1
93%
1017
03:00
+12°C
5.8
94%
1016
04:00
+11°C
5.9
94%
1016
05:00
+11°C
5.8
95%
1016
06:00
+11°C
6.5
95%
1016
07:00
+10°C
6.1
96%
1017
08:00
+11°C
6.1
96%
1017
09:00
+13°C
6.2
92%
1018
10:00
+15°C
6.5
83%
1018
11:00
+18°C
7.3
75%
1018
12:00
+19°C
6.3
70%
1018
13:00
+20°C
5.2
65%
1017
14:00
+21°C
5
62%
1016
15:00
+21°C
6.1
60%
1015
16:00
+21°C
7.5
61%
1015
17:00
+21°C
8.9
64%
1014
18:00
+20°C
9.4
70%
1014
19:00
+17°C
7.8
77%
1015
20:00
+16°C
6.9
81%
1015
21:00
+16°C
8
82%
1015
22:00
+15°C
8.4
84%
1016
23:00
+15°C
8.8
86%
1015
02 September 2026, Wednesday
+13°C / +23°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+14°C
9.1
87%
1015
01:00
+14°C
8.3
88%
1015
02:00
+13°C
7.9
89%
1015
03:00
+13°C
7.1
91%
1014
04:00
+13°C
7.9
93%
1013
05:00
+13°C
9.1
94%
1012
06:00
+13°C
9.4
95%
1012
07:00
+13°C
9.6
96%
1012
08:00
+13°C
11.2
96%
1012
09:00
+15°C
11
93%
1012
10:00
+17°C
12.3
85%
1012
11:00
+19°C
13.5
78%
1012
12:00
+21°C
14.8
70%
1011
13:00
+22°C
18.5
65%
1010
14:00
+23°C
17.9
62%
1008
15:00
+23°C
17.2
60%
1007
16:00
+23°C
16.2
60%
1006
17:00
+23°C
15.1
61%
1006
18:00
+22°C
11
70%
1005
19:00
+20°C
9.7
79%
1006
20:00
+19°C
8.1
84%
1006
21:00
+18°C
10
86%
1006
22:00
+17°C
6
90%
1007
23:00
+16°C
13
92%
1009
03 September 2026, Thursday
+11°C / +20°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+16°C
6
97%
1009
01:00
+15°C
13.5
97%
1010
02:00
+15°C
14.8
95%
1010
03:00
+15°C
10.1
93%
1010
04:00
+14°C
8.5
92%
1010
05:00
+14°C
6.2
91%
1010
06:00
+13°C
9
89%
1011
07:00
+12°C
8.7
90%
1012
08:00
+13°C
10.1
86%
1013
09:00
+14°C
10.4
81%
1014
10:00
+15°C
10.4
74%
1015
11:00
+16°C
12
58%
1015
12:00
+17°C
10.2
48%
1015
13:00
+18°C
9.6
46%
1015
14:00
+20°C
13.5
38%
1014
15:00
+20°C
15
34%
1013
16:00
+20°C
14.1
35%
1013
17:00
+19°C
12.4
38%
1013
18:00
+18°C
11.2
41%
1013
19:00
+16°C
11.6
44%
1014
20:00
+15°C
12.6
46%
1015
21:00
+14°C
12.7
49%
1016
22:00
+12°C
11
54%
1016
23:00
+11°C
8.3
60%
1017
04 September 2026, Friday
+7°C / +17°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+10°C
6.4
65%
1017
01:00
+9°C
6
69%
1018
02:00
+8°C
6.4
72%
1018
03:00
+8°C
6.4
75%
1018
04:00
+7°C
5.6
77%
1018
05:00
+7°C
4.7
79%
1018
06:00
+7°C
4.2
79%
1018
07:00
+8°C
4.5
77%
1019
08:00
+9°C
5.6
74%
1020
09:00
+10°C
6.9
68%
1020
10:00
+12°C
7.3
59%
1020
11:00
+14°C
7.6
49%
1020
12:00
+16°C
7.7
43%
1020
13:00
+16°C
8.1
40%
1019
14:00
+17°C
9
38%
1018
15:00
+17°C
9.4
38%
1018
16:00
+17°C
8.9
39%
1017
17:00
+16°C
7.5
42%
1017
18:00
+15°C
6.4
45%
1017
19:00
+14°C
6.6
48%
1018
20:00
+12°C
7.2
52%
1018
21:00
+11°C
7.1
57%
1019
22:00
+10°C
5.4
62%
1019
23:00
+9°C
4.5
68%
1020
05 September 2026, Saturday
+7°C / +14°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+8°C
5.6
71%
1020
01:00
+8°C
7.4
69%
1020
02:00
+8°C
9.5
65%
1020
03:00
+8°C
10.9
62%
1020
04:00
+8°C
10.6
63%
1020
05:00
+7°C
10.3
67%
1021
06:00
+7°C
10.9
68%
1021
07:00
+8°C
11.9
66%
1022
08:00
+9°C
12.6
63%
1024
09:00
+10°C
13.9
58%
1025
10:00
+11°C
16.3
51%
1025
11:00
+12°C
19.2
44%
1026
12:00
+12°C
21.3
39%
1026
13:00
+13°C
21.7
37%
1026
14:00
+13°C
21.3
36%
1026
15:00
+13°C
20.4
36%
1025
16:00
+14°C
19.4
35%
1025
17:00
+13°C
18
35%
1025
18:00
+13°C
16.4
36%
1025
19:00
+11°C
12.7
48%
1027
20:00
+10°C
11
53%
1028
21:00
+9°C
9.9
57%
1028
22:00
+8°C
9.2
61%
1028
23:00
+7°C
8.4
65%
1029
06 September 2026, Sunday
+5°C / +12°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+7°C
7.7
69%
1029
01:00
+6°C
7.1
73%
1029
02:00
+5°C
6.7
76%
1029
03:00
+5°C
6.4
79%
1029
04:00
+5°C
6.3
80%
1030
05:00
+5°C
6.5
82%
1030
06:00
+5°C
7.4
82%
1030
07:00
+6°C
8.4
81%
1030
08:00
+6°C
9.4
79%
1030
09:00
+7°C
10.2
76%
1030
10:00
+8°C
10.5
71%
1030
11:00
+9°C
10.4
64%
1029
12:00
+10°C
10.5
56%
1029
13:00
+11°C
10.3
50%
1028
14:00
+12°C
10.3
46%
1027
15:00
+12°C
10.2
44%
1027
16:00
+12°C
10.3
45%
1026
17:00
+12°C
10.3
47%
1026
18:00
+11°C
10.2
51%
1026
19:00
+10°C
10.1
55%
1026
20:00
+9°C
9.9
60%
1026
21:00
+8°C
9.7
64%
1025
22:00
+8°C
9.3
67%
1025
23:00
+7°C
8.8
71%
1025
07 September 2026, Monday
+6°C / +16°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+7°C
8.1
74%
1025
01:00
+7°C
7.7
77%
1025
02:00
+6°C
7.3
79%
1025
03:00
+6°C
7.2
81%
1024
04:00
+6°C
7.3
81%
1024
05:00
+6°C
7.6
81%
1024
06:00
+7°C
8.1
80%
1024
07:00
+7°C
8.5
78%
1024
08:00
+8°C
9
76%
1024
09:00
+8°C
9.5
73%
1023
10:00
+10°C
10.1
69%
1023
11:00
+11°C
10.9
63%
1022
12:00
+13°C
11.7
57%
1021
13:00
+14°C
12.7
53%
1020
14:00
+15°C
13.2
50%
1020
15:00
+16°C
13.5
48%
1019
16:00
+16°C
13.3
49%
1019
17:00
+15°C
12.7
52%
1019
18:00
+15°C
12.1
56%
1019
19:00
+14°C
11.4
62%
1019
20:00
+13°C
10.7
67%
1018
21:00
+12°C
10.2
71%
1018
22:00
+11°C
9.6
75%
1018
23:00
+10°C
8.9
78%
1018
08 September 2026, Tuesday
+9°C / +20°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+10°C
7.8
81%
1018
01:00
+9°C
7.1
84%
1017
02:00
+9°C
6.6
85%
1017
03:00
+9°C
6.2
87%
1017
04:00
+9°C
6.2
88%
1017
05:00
+9°C
6.4
89%
1017
06:00
+9°C
6.9
89%
1017
07:00
+10°C
7.3
89%
1017
08:00
+11°C
7.7
87%
1017
09:00
+11°C
7.8
83%
1017
10:00
+13°C
7.9
78%
1016
11:00
+14°C
7.9
70%
1016
12:00
+16°C
8.1
63%
1015
13:00
+18°C
8.4
57%
1014
14:00
+19°C
8.5
53%
1014
15:00
+20°C
8.2
51%
1014
16:00
+20°C
7.5
52%
1013
17:00
+19°C
6.4
55%
1013
18:00
+18°C
5.3
60%
1013
19:00
+16°C
4.5
66%
1014
20:00
+15°C
4.1
73%
1014
21:00
+14°C
4
78%
1014
22:00
+14°C
3.6
81%
1014
23:00
+13°C
3.1
84%
1014
09 September 2026, Wednesday
+12°C / +20°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+13°C
2.6
86%
1013
01:00
+12°C
2
88%
1013
02:00
+12°C
1.7
89%
1013
03:00
+12°C
1.2
91%
1013
04:00
+12°C
1
92%
1013
05:00
+12°C
2
93%
1014
06:00
+12°C
3.8
94%
1014
07:00
+12°C
5.6
93%
1014
08:00
+12°C
7.2
92%
1014
09:00
+12°C
8.2
90%
1014
10:00
+13°C
8.6
85%
1014
11:00
+15°C
8.4
79%
1014
12:00
+16°C
7.9
73%
1013
13:00
+18°C
7.5
67%
1013
14:00
+19°C
6.9
63%
1013
15:00
+20°C
6.7
62%
1012
16:00
+20°C
6.5
63%
1012
17:00
+19°C
6.7
67%
1013
18:00
+18°C
7
73%
1013
19:00
+16°C
7.4
80%
1013
20:00
+15°C
7.7
86%
1013
21:00
+14°C
7.8
91%
1014
22:00
+13°C
7.7
93%
1014
23:00
+13°C
7.4
95%
1014
10 September 2026, Thursday
+11°C / +24°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+12°C
6.8
95%
1014
01:00
+11°C
6.5
96%
1014
02:00
+11°C
6
95%
1014
03:00
+11°C
5.7
95%
1014
04:00
+11°C
5.6
96%
1015
05:00
+11°C
5.7
97%
1015
06:00
+11°C
5.9
97%
1015
07:00
+11°C
6.2
96%
1016
08:00
+12°C
6.6
94%
1016
09:00
+13°C
6.9
89%
1016
10:00
+14°C
7.4
81%
1016
11:00
+17°C
8.1
70%
1016
12:00
+19°C
9
60%
1016
13:00
+21°C
9.9
52%
1015
14:00
+23°C
10.9
46%
1015
15:00
+24°C
11.6
43%
1015
16:00
+24°C
11.9
42%
1016
17:00
+23°C
11.8
43%
1016
18:00
+21°C
11.5
45%
1017
19:00
+19°C
11.2
49%
1017
20:00
+17°C
10.8
52%
1018
21:00
+16°C
10.7
54%
1018
22:00
+15°C
10.7
56%
1019
23:00
+14°C
10.7
58%
1019
11 September 2026, Friday
+11°C / +19°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+13°C
10.9
60%
1019
01:00
+13°C
11
62%
1020
02:00
+12°C
10.9
64%
1020
03:00
+12°C
10.7
66%
1021
04:00
+12°C
10.4
68%
1022
05:00
+11°C
10.1
70%
1022
06:00
+12°C
10
73%
1023
07:00
+12°C
9.9
74%
1024
08:00
+12°C
10.2
75%
1025
09:00
+13°C
10.6
74%
1025
10:00
+14°C
10.8
70%
1025
11:00
+15°C
10.9
64%
1025
12:00
+16°C
10.9
58%
1025
13:00
+18°C
10.9
52%
1025
14:00
+19°C
10.8
48%
1024
15:00
+19°C
10.7
47%
1024
16:00
+19°C
10.7
48%
1024
17:00
+18°C
10.4
50%
1024
18:00
+17°C
10
54%
1024
19:00
+16°C
9.8
60%
1024
20:00
+15°C
9.5
64%
1024
21:00
+14°C
9.4
68%
1024
22:00
+13°C
9.4
71%
1024
23:00
+12°C
9.6
73%
1024
12 September 2026, Saturday
+10°C / +21°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+12°C
9.8
74%
1024
01:00
+11°C
10.1
75%
1024
02:00
+11°C
10.3
75%
1024
03:00
+11°C
10.6
76%
1024
04:00
+10°C
10.9
76%
1024
05:00
+10°C
11.2
77%
1024
06:00
+10°C
11.5
77%
1025
07:00
+11°C
11.8
76%
1025
08:00
+11°C
12
75%
1025
09:00
+12°C
12.4
73%
1025
10:00
+13°C
12.7
69%
1025
11:00
+15°C
13.1
63%
1024
12:00
+17°C
13.6
57%
1023
13:00
+19°C
14.1
52%
1022
14:00
+20°C
14.5
49%
1022
15:00
+21°C
14.7
48%
1021
16:00
+21°C
14.8
49%
1021
17:00
+21°C
15
51%
1021
18:00
+20°C
15
55%
1021
19:00
+18°C
15
60%
1021
20:00
+17°C
14.8
65%
1021
21:00
+16°C
14.6
69%
1021
22:00
+16°C
14
72%
1021
23:00
+15°C
13.1
75%
1021
13 September 2026, Sunday
+12°C / +23°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+14°C
11.9
77%
1021
01:00
+13°C
10.9
80%
1021
02:00
+13°C
10.5
81%
1021
03:00
+13°C
10
81%
1021
04:00
+12°C
10.1
81%
1021
05:00
+12°C
10.3
81%
1021
06:00
+12°C
10.9
80%
1021
07:00
+13°C
11.4
78%
1021
08:00
+13°C
11.8
76%
1021
09:00
+14°C
12.3
72%
1021
10:00
+15°C
12.8
67%
1020
11:00
+17°C
13.3
60%
1019
12:00
+19°C
13.9
53%
1018
13:00
+21°C
14.4
48%
1018
14:00
+22°C
14.7
44%
1017
15:00
+23°C
15.1
42%
1016
16:00
+23°C
15.1
43%
1015
17:00
+22°C
15.1
46%
1015
18:00
+21°C
15
51%
1015
19:00
+20°C
14.8
56%
1014
20:00
+18°C
14.9
61%
1014
21:00
+17°C
14.9
65%
1014
22:00
+17°C
14.8
68%
1013
23:00
+16°C
14.7
69%
1013
Climate Characteristics of Rosario
General Overview
Rosario features a humid subtropical climate. The city enjoys moderate temperatures throughout much of the year but is known for hot, very humid summers and relatively short, mild winters. Its location on the banks of the Paraná River contributes to high humidity and frequent mists, especially during autumn and winter.
Summer and Rainy Season (November to March)
Summer in Rosario is very hot and often oppressive due to high humidity. Daytime temperatures range between 30°C and 32°C (86-90°F), though heatwaves can easily push them above 35°C (95°F). This is the wettest season, with most rainfall occurring as intense and sudden afternoon or evening thunderstorms.
Winter Season (June to August)
Winter in Rosario is mild and quite pleasant. Daytime temperatures range from 16°C to 18°C (61-64°F), while nighttime lows drop to 7°C (45°F) on average. Snow is an extremely rare event in Rosario, but frost may occur in the early mornings at the peak of the season. Sunny and clear days are very common in winter.
Transition Seasons (April-May and September-October)
Autumn and spring are considered the most beautiful times to visit the city. The weather is balanced and very comfortable for activities along the river (around 22°C to 24°C / 72-75°F). In spring, nature blooms and the air is fresh, while autumn brings clear skies and pleasant evenings.
Weather in Rosario by Month
January
Peak of summer. Very hot and humid. 32°C (90°F) daytime and 20°C (68°F) at night. Sudden thunderstorms are common.
February
Still hot and humid (30°C/86°F daytime). Many sunny days allowing for river beach activities.
March
Start of autumn. Warm and pleasant (28°C/82°F daytime). Humidity begins to decrease gradually.
April
One of the best months. Clear days and a comfortable temperature of 24°C (75°F) daytime.
May
Cool and pleasant autumn (20°C/68°F daytime). Nights become significantly cooler (10°C/50°F).
June
Start of winter. Mild and cool (16°C/61°F daytime and 8°C/46°F at night). Morning mists common near the river.
July
The coldest month. 16°C (61°F) daytime and 7°C (45°F) at night. Mostly sunny days.
August
Slight warming (19°C/66°F daytime). Mostly dry and clear weather.
September
Start of spring. 21°C (70°F) daytime. Renewal and blooming throughout the city.
October
A wonderful month. 25°C (77°F) daytime. Ideal weather for tours and outdoor activities.
November
Warm and wetter spring (28°C/82°F daytime). Humidity rises toward summer.
December
Start of summer. Hot (30°C/86°F daytime). Vibrant city atmosphere leading up to the holidays.