Rosário do Sul weather in September

In September, Rosário do Sul sees average daytime highs of 22°C and overnight lows near 12°C, with 155 mm of rain across 9.9 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 35% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 24 min at the start of September to 12 h 18 min by month's end. Set against the rest of the year, September is Rosário do Sul's 9th-clearest and 1st-windiest month. For the whole year in context, see Rosário do Sul's year-round climate.

Daytime high: 22°; 8th warmest
Overnight low: 12°; 4th coldest
Rainfall: 155 mm; 9.9 wet days
Daylight: 11 h 48 min; 7:39 AM – 7:29 PM
Cloud cover: 57%; 9th clearest
Wind: 15 km/h; 1st windiest
Solar energy: 4.33 kWh/m²
Travel score: 6.7; out of 10

← August Rosário do Sul year-round climate October →Best places to visit in September

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 22°C through the month.

A typical September day in Rosário do Sul reaches about 22°C in the afternoon and slips back to 12°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 28°C. Set against its neighbours, September runs about 1°C warmer than August and about 3°C cooler than October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	23	23	23	23	23	23
Avg low (°C)	11	11	11	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	13	13	13	13

	Avg high (°C)	Avg low (°C)
1	22	11
2	22	11
3	22	11
4	22	12
5	22	12
6	22	12
7	22	12
8	22	12
9	22	12
10	22	12
11	22	12
12	22	12
13	22	12
14	22	12
15	22	12
16	22	12
17	22	12
18	22	12
19	22	12
20	22	12
21	22	12
22	22	12
23	22	12
24	22	12
25	23	12
26	23	12
27	23	13
28	23	13
29	23	13
30	23	13

How September really feels in Rosário do Sul

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Rosário do Sul weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 2nd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	31° / 20°	134	11.5	13.7	4.5
Feb	30° / 20°	129	10.3	13.1	4.9
Mar	29° / 18°	122	9	12.2	5.9
Apr	25° / 15°	151	9.3	11.3	7.0
May	21° / 12°	114	8.7	10.5	6.7
Jun	19° / 10°	130	9.4	10.1	6.1
Jul	18° / 9°	129	9.4	10.2	6.2
Aug	21° / 10°	116	8.6	10.9	6.8
Sep	22° / 12°	155	9.9	11.8	6.7
Oct	25° / 14°	189	11	12.7	6.7
Nov	28° / 16°	129	8.5	13.5	6.5
Dec	30° / 19°	132	9.2	13.9	5.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 53%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	51	50	50	48	48	48	46	46	46	46	46	46	48	48	48	48	48	48	48	49	49	49	49	48	48	47	45	44	44	43
Cloudier (%)	49	50	50	52	52	52	54	54	54	54	54	54	52	52	52	52	52	52	52	51	51	51	51	52	52	53	55	56	56	57

	Clearer (%)	Cloudier (%)
1	51	49
2	50	50
3	50	50
4	48	52
5	48	52
6	48	52
7	46	54
8	46	54
9	46	54
10	46	54
11	46	54
12	46	54
13	48	52
14	48	52
15	48	52
16	48	52
17	48	52
18	48	52
19	48	52
20	49	51
21	49	51
22	49	51
23	49	51
24	48	52
25	48	52
26	47	53
27	45	55
28	44	56
29	44	56
30	43	57

Chance of precipitation in September

Any precipitation

Rosário do Sul gets around 155 mm of rain over 9.9 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 33% and peaks near 35% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	34	34	34	35	35	35	35	35	35	34	34	34	34	33	33	33	32	32	32	31	31	31	31	31	31	32	32	32	33	33

	Rain chance (%)
1	34
2	34
3	34
4	35
5	35
6	35
7	35
8	35
9	35
10	34
11	34
12	34
13	34
14	33
15	33
16	33
17	32
18	32
19	32
20	31
21	31
22	31
23	31
24	31
25	31
26	32
27	32
28	32
29	33
30	33

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the dry band about 54% of days. Sticky, muggy-or-worse air turns up on roughly 5% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Dry (%)	56	55	54	54	54	55	55	55	55	55	56	55	55	55	55	55	55	56	56	56	56	56	55	54	52	52	51	50	50	49
Comfortable (%)	21	21	21	21	21	21	21	21	22	22	22	23	23	24	24	24	24	23	23	23	23	23	23	23	24	24	24	24	24	24
Humid (%)	19	20	20	20	20	19	19	19	18	18	17	17	17	16	16	16	16	16	16	16	16	16	17	17	18	18	19	19	19	19
Muggy (%)	4	4	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	6	6	6	6	7	7	7

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	56	21	19	4
2	55	21	20	4
3	54	21	20	5
4	54	21	20	5
5	54	21	20	5
6	55	21	19	5
7	55	21	19	5
8	55	21	19	5
9	55	22	18	5
10	55	22	18	5
11	56	22	17	5
12	55	23	17	5
13	55	23	17	5
14	55	24	16	5
15	55	24	16	5
16	55	24	16	5
17	55	24	16	5
18	56	23	16	5
19	56	23	16	5
20	56	23	16	5
21	56	23	16	5
22	56	23	16	5
23	55	23	17	5
24	54	23	17	6
25	52	24	18	6
26	52	24	18	6
27	51	24	19	6
28	50	24	19	7
29	50	24	19	7
30	49	24	19	7

Wind in September

Winds average 15 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	14	14	14	14	14	14	14	14	14	14	14	14	14	14	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	14	light breeze
2	14	light breeze
3	14	light breeze
4	14	light breeze
5	14	light breeze
6	14	light breeze
7	14	light breeze
8	14	light breeze
9	14	light breeze
10	14	light breeze
11	14	light breeze
12	14	light breeze
13	14	light breeze
14	14	light breeze
15	15	light breeze
16	15	light breeze
17	15	light breeze
18	15	light breeze
19	15	light breeze
20	15	light breeze
21	15	light breeze
22	15	light breeze
23	15	light breeze
24	15	light breeze
25	15	light breeze
26	15	light breeze
27	15	light breeze
28	15	light breeze
29	15	light breeze
30	15	light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 24 min at the start of September to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over September. Sunrise moves from 7:59 AM to 7:21 AM, and sunset from 7:20 PM to 7:37 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	11.4	11.4	11.4	11.4	11.5	11.5	11.5	11.6	11.6	11.6	11.7	11.7	11.7	11.8	11.8	11.8	11.9	11.9	11.9	11.9	12.0	12.0	12.0	12.1	12.1	12.1	12.2	12.2	12.2	12.3
Sunrise (AM)	7:59	7:57	7:56	7:55	7:54	7:52	7:51	7:50	7:49	7:47	7:46	7:45	7:43	7:42	7:41	7:39	7:38	7:37	7:35	7:34	7:33	7:32	7:30	7:29	7:28	7:26	7:25	7:24	7:22	7:21
Sunset (PM)	7:20	7:21	7:21	7:22	7:22	7:23	7:23	7:24	7:25	7:25	7:26	7:26	7:27	7:27	7:28	7:29	7:29	7:30	7:30	7:31	7:31	7:32	7:33	7:33	7:34	7:34	7:35	7:36	7:36	7:37

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.4	7:59	7:20
2	11.4	7:57	7:21
3	11.4	7:56	7:21
4	11.4	7:55	7:22
5	11.5	7:54	7:22
6	11.5	7:52	7:23
7	11.5	7:51	7:23
8	11.6	7:50	7:24
9	11.6	7:49	7:25
10	11.6	7:47	7:25
11	11.7	7:46	7:26
12	11.7	7:45	7:26
13	11.7	7:43	7:27
14	11.8	7:42	7:27
15	11.8	7:41	7:28
16	11.8	7:39	7:29
17	11.9	7:38	7:29
18	11.9	7:37	7:30
19	11.9	7:35	7:30
20	11.9	7:34	7:31
21	12.0	7:33	7:31
22	12.0	7:32	7:32
23	12.0	7:30	7:33
24	12.1	7:29	7:33
25	12.1	7:28	7:34
26	12.1	7:26	7:34
27	12.2	7:25	7:35
28	12.2	7:24	7:36
29	12.2	7:22	7:36
30	12.3	7:21	7:37

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.33 kWh/m².

For context, solar energy here swings from a low near 2.42 kWh/m² to a high of 6.95 kWh/m² in December across the year — September's 4.33 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	3.9	3.9	3.9	3.9	4.0	4.0	4.0	4.0	4.1	4.1	4.1	4.2	4.2	4.3	4.3	4.3	4.4	4.4	4.5	4.5	4.5	4.6	4.6	4.6	4.7	4.7	4.7	4.7	4.8	4.8
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	3.9	Moderate
2	3.9	Moderate
3	3.9	Moderate
4	3.9	Moderate
5	4.0	Moderate
6	4.0	Moderate
7	4.0	Bright
8	4.0	Bright
9	4.1	Bright
10	4.1	Bright
11	4.1	Bright
12	4.2	Bright
13	4.2	Bright
14	4.3	Bright
15	4.3	Bright
16	4.3	Bright
17	4.4	Bright
18	4.4	Bright
19	4.5	Bright
20	4.5	Bright
21	4.5	Bright
22	4.6	Bright
23	4.6	Bright
24	4.6	Bright
25	4.7	Bright
26	4.7	Bright
27	4.7	Bright
28	4.7	Bright
29	4.8	Bright
30	4.8	Bright

Planning a trip in September

Is September a good time to visit Rosário do Sul?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.7

Sightseeing

3rd-best month of the year

4.7

Beach & pool

8th-best month of the year

September is a reasonable time to visit Rosário do Sul for sightseeing.

What to pack for Rosário do Sul in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Rosário do Sul sees daytime highs around 22°C and nights near 12°C. Worth packing: light clothes and rain gear. About 10 days see rain.

light clothesrain gear

UV index in Rosário do Sul in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rosário do Sul peaks around January 18 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	13	13	10	7	4	3	4	5	7	7	11	12
Level	Extreme	Extreme	Very high	Very high	Moderate	Moderate	Moderate	Moderate	Very high	Very high	Extreme	Extreme

	UV index (midday)	Level
Jan	13	Extreme
Feb	13	Extreme
Mar	10	Very high
Apr	7	Very high
May	4	Moderate
Jun	3	Moderate
Jul	4	Moderate
Aug	5	Moderate
Sep	7	Very high
Oct	7	Very high
Nov	11	Extreme
Dec	12	Extreme

Location & terrain

Where is Rosário do Sul?

Rosário do Sul sits at 30.3°S, 54.9°W, 123 m above sea level, in Brazil. The nearest listed city is São Gabriel, 58 km away.

Topography around Rosário do Sul

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Rosário do Sul.

Within 3 km, the terrain around Rosário do Sul has only modest variations in elevation — a maximum elevation change of 76 m around an average of 102 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 119 m; within 80 km, significant variations in elevation — a maximum elevation change of 306 m.

The land around Rosário do Sul is covered by trees (35%), grassland (25%) and artificial surfaces (20%) within 3 km, grassland (43%) and cropland (38%) within 16 km, and grassland (55%) and cropland (31%) within 80 km.

3 km

76 m

trees 35%

16 km

119 m

grassland 43%

80 km

306 m

grassland 55%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland

← August Rosário do Sul year-round climate October →Best places to visit in September

September weather nearby: São Gabriel 58 km · São Francisco de Assis 81 km · Dom Pedrito 84 km · Sant'Ana do Livramento 92 km · Rivera 94 km · Alegrete 100 km · São Pedro do Sul 100 km · Santiago 119 km

Brazil travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / N; 127 / 220 V · 60 Hz
Prices: ≈ 46% of US; price level, 2025
GDP per capita: $10,713; 2025
Happiness: 6.6 / 10; World Happiness, 2025
Safe drinking water: 89%; of population, 2024
Homicide rate: 19.3; per 100k, 2023
Road deaths: 16; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Low; EF EPI 482
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Rosário do Sul (-30.2583°, -54.9142°, elevation 123 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	22	11
2	22	11
3	22	11
4	22	12
5	22	12
6	22	12
7	22	12
8	22	12
9	22	12
10	22	12
11	22	12
12	22	12
13	22	12
14	22	12
15	22	12
16	22	12
17	22	12
18	22	12
19	22	12
20	22	12
21	22	12
22	22	12
23	22	12
24	22	12
25	23	12
26	23	12
27	23	13
28	23	13
29	23	13
30	23	13

	Clearer (%)	Cloudier (%)
1	51	49
2	50	50
3	50	50
4	48	52
5	48	52
6	48	52
7	46	54
8	46	54
9	46	54
10	46	54
11	46	54
12	46	54
13	48	52
14	48	52
15	48	52
16	48	52
17	48	52
18	48	52
19	48	52
20	49	51
21	49	51
22	49	51
23	49	51
24	48	52
25	48	52
26	47	53
27	45	55
28	44	56
29	44	56
30	43	57

	Rain chance (%)
1	34
2	34
3	34
4	35
5	35
6	35
7	35
8	35
9	35
10	34
11	34
12	34
13	34
14	33
15	33
16	33
17	32
18	32
19	32
20	31
21	31
22	31
23	31
24	31
25	31
26	32
27	32
28	32
29	33
30	33

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	56	21	19	4
2	55	21	20	4
3	54	21	20	5
4	54	21	20	5
5	54	21	20	5
6	55	21	19	5
7	55	21	19	5
8	55	21	19	5
9	55	22	18	5
10	55	22	18	5
11	56	22	17	5
12	55	23	17	5
13	55	23	17	5
14	55	24	16	5
15	55	24	16	5
16	55	24	16	5
17	55	24	16	5
18	56	23	16	5
19	56	23	16	5
20	56	23	16	5
21	56	23	16	5
22	56	23	16	5
23	55	23	17	5
24	54	23	17	6
25	52	24	18	6
26	52	24	18	6
27	51	24	19	6
28	50	24	19	7
29	50	24	19	7
30	49	24	19	7

	Avg high (°C)	Avg low (°C)
1	22	11
2	22	11
3	22	11
4	22	12
5	22	12
6	22	12
7	22	12
8	22	12
9	22	12
10	22	12
11	22	12
12	22	12
13	22	12
14	22	12
15	22	12
16	22	12
17	22	12
18	22	12
19	22	12
20	22	12
21	22	12
22	22	12
23	22	12
24	22	12
25	23	12
26	23	12
27	23	13
28	23	13
29	23	13
30	23	13

	Clearer (%)	Cloudier (%)
1	51	49
2	50	50
3	50	50
4	48	52
5	48	52
6	48	52
7	46	54
8	46	54
9	46	54
10	46	54
11	46	54
12	46	54
13	48	52
14	48	52
15	48	52
16	48	52
17	48	52
18	48	52
19	48	52
20	49	51
21	49	51
22	49	51
23	49	51
24	48	52
25	48	52
26	47	53
27	45	55
28	44	56
29	44	56
30	43	57

	Rain chance (%)
1	34
2	34
3	34
4	35
5	35
6	35
7	35
8	35
9	35
10	34
11	34
12	34
13	34
14	33
15	33
16	33
17	32
18	32
19	32
20	31
21	31
22	31
23	31
24	31
25	31
26	32
27	32
28	32
29	33
30	33

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	56	21	19	4
2	55	21	20	4
3	54	21	20	5
4	54	21	20	5
5	54	21	20	5
6	55	21	19	5
7	55	21	19	5
8	55	21	19	5
9	55	22	18	5
10	55	22	18	5
11	56	22	17	5
12	55	23	17	5
13	55	23	17	5
14	55	24	16	5
15	55	24	16	5
16	55	24	16	5
17	55	24	16	5
18	56	23	16	5
19	56	23	16	5
20	56	23	16	5
21	56	23	16	5
22	56	23	16	5
23	55	23	17	5
24	54	23	17	6
25	52	24	18	6
26	52	24	18	6
27	51	24	19	6
28	50	24	19	7
29	50	24	19	7
30	49	24	19	7

	Avg high (°C)	Avg low (°C)
1	22	11
2	22	11
3	22	11
4	22	12
5	22	12
6	22	12
7	22	12
8	22	12
9	22	12
10	22	12
11	22	12
12	22	12
13	22	12
14	22	12
15	22	12
16	22	12
17	22	12
18	22	12
19	22	12
20	22	12
21	22	12
22	22	12
23	22	12
24	22	12
25	23	12
26	23	12
27	23	13
28	23	13
29	23	13
30	23	13

	Clearer (%)	Cloudier (%)
1	51	49
2	50	50
3	50	50
4	48	52
5	48	52
6	48	52
7	46	54
8	46	54
9	46	54
10	46	54
11	46	54
12	46	54
13	48	52
14	48	52
15	48	52
16	48	52
17	48	52
18	48	52
19	48	52
20	49	51
21	49	51
22	49	51
23	49	51
24	48	52
25	48	52
26	47	53
27	45	55
28	44	56
29	44	56
30	43	57

	Rain chance (%)
1	34
2	34
3	34
4	35
5	35
6	35
7	35
8	35
9	35
10	34
11	34
12	34
13	34
14	33
15	33
16	33
17	32
18	32
19	32
20	31
21	31
22	31
23	31
24	31
25	31
26	32
27	32
28	32
29	33
30	33

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	56	21	19	4
2	55	21	20	4
3	54	21	20	5
4	54	21	20	5
5	54	21	20	5
6	55	21	19	5
7	55	21	19	5
8	55	21	19	5
9	55	22	18	5
10	55	22	18	5
11	56	22	17	5
12	55	23	17	5
13	55	23	17	5
14	55	24	16	5
15	55	24	16	5
16	55	24	16	5
17	55	24	16	5
18	56	23	16	5
19	56	23	16	5
20	56	23	16	5
21	56	23	16	5
22	56	23	16	5
23	55	23	17	5
24	54	23	17	6
25	52	24	18	6
26	52	24	18	6
27	51	24	19	6
28	50	24	19	7
29	50	24	19	7
30	49	24	19	7