Ribeirão Branco weather in September

In September, Ribeirão Branco sees average daytime highs of 23°C and overnight lows near 13°C, with 118 mm of rain across 11 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 30% of the time in September, and the air most often feels comfortable.

Daylight stretches from about 11 h 30 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Ribeirão Branco's 6th-clearest and 3rd-windiest month. For the whole year in context, see Ribeirão Branco's year-round climate.

Daytime high: 23°; 8th warmest
Overnight low: 13°; 5th coldest
Rainfall: 118 mm; 11 wet days
Daylight: 11 h 54 min; 7:14 AM – 7:05 PM
Cloud cover: 64%; 6th clearest
Wind: 10 km/h; 3rd windiest
Solar energy: 4.39 kWh/m²
Travel score: 6.5; out of 10

Ribeirão Branco is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← August Ribeirão Branco 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 23°C through the month.

A typical September day in Ribeirão Branco reaches about 23°C in the afternoon and slips back to 13°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 30°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°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)	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23
Avg low (°C)	12	12	12	12	12	12	12	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	14

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

Ribeirão Branco weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 7th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	27° / 18°	280	25.3	13.3	4.2
Feb	27° / 18°	212	22.3	12.8	4.2
Mar	26° / 18°	163	21.3	12.2	4.9
Apr	24° / 16°	75	11.4	11.5	6.5
May	21° / 13°	83	10.1	10.8	6.5
Jun	21° / 12°	79	7.5	10.5	6.8
Jul	20° / 11°	78	6.6	10.7	6.9
Aug	22° / 11°	56	6.9	11.2	7.2
Sep	23° / 13°	118	11	11.8	6.5
Oct	24° / 15°	136	15.5	12.6	5.8
Nov	25° / 16°	145	17.6	13.2	5.4
Dec	26° / 17°	198	21.3	13.5	4.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 10% of September, with mostly cloudy or overcast conditions the remaining 60%. Skies tend to cloud over as the month goes on.

	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 (%)	55	54	53	51	50	49	47	46	45	43	42	42	41	41	40	39	38	38	37	36	35	33	32	32	31	30	29	28	27	27
Cloudier (%)	45	46	47	49	50	51	53	54	55	57	58	58	59	59	60	61	62	62	63	64	65	67	68	68	69	70	71	72	73	73

	Clearer (%)	Cloudier (%)
1	55	45
2	54	46
3	53	47
4	51	49
5	50	50
6	49	51
7	47	53
8	46	54
9	45	55
10	43	57
11	42	58
12	42	58
13	41	59
14	41	59
15	40	60
16	39	61
17	38	62
18	38	62
19	37	63
20	36	64
21	35	65
22	33	67
23	32	68
24	32	68
25	31	69
26	30	70
27	29	71
28	28	72
29	27	73
30	27	73

Chance of precipitation in September

Any precipitation

Ribeirão Branco gets around 118 mm of rain over 11 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 36% and peaks near 46% on the wettest days. The odds climb toward the end of the month.

	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 (%)	26	27	27	28	28	29	30	30	31	31	31	32	33	33	34	35	36	37	38	40	41	42	42	43	44	45	45	46	46	46

	Rain chance (%)
1	26
2	27
3	27
4	28
5	28
6	29
7	30
8	30
9	31
10	31
11	31
12	32
13	33
14	33
15	34
16	35
17	36
18	37
19	38
20	40
21	41
22	42
23	42
24	43
25	44
26	45
27	45
28	46
29	46
30	46

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 44% of days. It rarely turns muggy — the humid and sticky bands barely register.

	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 (%)	50	49	48	47	46	45	44	43	42	41	40	39	38	37	36	36	35	35	34	34	33	33	32	31	31	30	29	29	28	28
Comfortable (%)	41	41	42	42	43	43	44	44	45	45	46	47	47	47	47	47	47	47	47	47	46	46	45	44	44	43	42	41	40	39
Humid (%)	9	9	10	11	11	12	12	13	13	13	14	14	15	15	16	16	17	17	18	19	20	21	22	23	24	26	27	29	30	31
Muggy (%)	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1	1	1	1	1	1	1	1	1	1	2	2	2	2	2

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	50	41	9	0
2	49	41	9	0
3	48	42	10	0
4	47	42	11	0
5	46	43	11	0
6	45	43	12	0
7	44	44	12	0
8	43	44	13	0
9	42	45	13	0
10	41	45	13	0
11	40	46	14	0
12	39	47	14	0
13	38	47	15	1
14	37	47	15	1
15	36	47	16	1
16	36	47	16	1
17	35	47	17	1
18	35	47	17	1
19	34	47	18	1
20	34	47	19	1
21	33	46	20	1
22	33	46	21	1
23	32	45	22	1
24	31	44	23	1
25	31	44	24	1
26	30	43	26	2
27	29	42	27	2
28	29	41	29	2
29	28	40	30	2
30	28	39	31	2

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 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)	9	9	9	9	9	9	9	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 30 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over September. Sunrise moves from 7:30 AM to 6:58 AM, and sunset from 7:00 PM to 7:10 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)	11.5	11.5	11.6	11.6	11.6	11.6	11.6	11.7	11.7	11.7	11.7	11.8	11.8	11.8	11.8	11.9	11.9	11.9	11.9	12.0	12.0	12.0	12.0	12.1	12.1	12.1	12.1	12.2	12.2	12.2
Sunrise (AM)	7:30	7:29	7:28	7:27	7:25	7:24	7:23	7:22	7:21	7:20	7:19	7:18	7:17	7:16	7:15	7:14	7:12	7:11	7:10	7:09	7:08	7:07	7:06	7:05	7:04	7:03	7:02	7:01	6:59	6:58
Sunset (PM)	7:00	7:00	7:01	7:01	7:01	7:02	7:02	7:02	7:03	7:03	7:03	7:04	7:04	7:05	7:05	7:05	7:06	7:06	7:06	7:07	7:07	7:07	7:08	7:08	7:08	7:09	7:09	7:10	7:10	7:10

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.5	7:30	7:00
2	11.5	7:29	7:00
3	11.6	7:28	7:01
4	11.6	7:27	7:01
5	11.6	7:25	7:01
6	11.6	7:24	7:02
7	11.6	7:23	7:02
8	11.7	7:22	7:02
9	11.7	7:21	7:03
10	11.7	7:20	7:03
11	11.7	7:19	7:03
12	11.8	7:18	7:04
13	11.8	7:17	7:04
14	11.8	7:16	7:05
15	11.8	7:15	7:05
16	11.9	7:14	7:05
17	11.9	7:12	7:06
18	11.9	7:11	7:06
19	11.9	7:10	7:06
20	12.0	7:09	7:07
21	12.0	7:08	7:07
22	12.0	7:07	7:07
23	12.0	7:06	7:08
24	12.1	7:05	7:08
25	12.1	7:04	7:08
26	12.1	7:03	7:09
27	12.1	7:02	7:09
28	12.2	7:01	7:10
29	12.2	6:59	7:10
30	12.2	6:58	7:10

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.39 kWh/m².

For context, solar energy here swings from a low near 3.03 kWh/m² to a high of 5.48 kWh/m² in December across the year — September's 4.39 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)	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.5
Level	Bright	Bright	Bright	Bright	Bright	Bright	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	4.4	Bright
2	4.4	Bright
3	4.4	Bright
4	4.4	Bright
5	4.4	Bright
6	4.4	Bright
7	4.4	Bright
8	4.4	Bright
9	4.4	Bright
10	4.4	Bright
11	4.4	Bright
12	4.4	Bright
13	4.4	Bright
14	4.4	Bright
15	4.4	Bright
16	4.4	Bright
17	4.4	Bright
18	4.4	Bright
19	4.4	Bright
20	4.4	Bright
21	4.4	Bright
22	4.4	Bright
23	4.4	Bright
24	4.4	Bright
25	4.4	Bright
26	4.4	Bright
27	4.4	Bright
28	4.4	Bright
29	4.4	Bright
30	4.5	Bright

Planning a trip in September

Hazard calendar for Ribeirão Branco

In seasonPeak

None of Ribeirão Branco's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Ribeirão Branco's rainy season runs October–March, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Ribeirão Branco?

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

6.5

Sightseeing

4th-best month of the year

5.0

Beach & pool

2nd-best month of the year

September is a reasonable time to visit Ribeirão Branco for sightseeing.

What to pack for Ribeirão Branco in September

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

In September, Ribeirão Branco sees daytime highs around 23°C and nights near 13°C. Worth packing: light clothes and rain gear. About 11 days see rain.

light clothesrain gear

UV index in Ribeirão Branco in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ribeirão Branco peaks around January 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 5 (high).

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)	15	15	12	9	7	6	5	7	8	11	13	14
Level	Extreme	Extreme	Extreme	Very high	High	High	High	Very high	Very high	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	15	Extreme
Feb	15	Extreme
Mar	12	Extreme
Apr	9	Very high
May	7	High
Jun	6	High
Jul	5	High
Aug	7	Very high
Sep	8	Very high
Oct	11	Extreme
Nov	13	Extreme
Dec	14	Extreme

Location & terrain

Where is Ribeirão Branco?

Ribeirão Branco sits at 24.2°S, 48.8°W, 873 m above sea level, in Brazil. The nearest listed city is Guapiara, 24 km away.

Topography around Ribeirão Branco

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ribeirão Branco.

Within 3 km, the terrain around Ribeirão Branco has only modest variations in elevation — a maximum elevation change of 153 m around an average of 855 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 437 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,316 m.

The land around Ribeirão Branco is covered by trees (52%) and grassland (30%) within 3 km, trees (73%) within 16 km, and trees (71%) within 80 km.

3 km

153 m

trees 52%

16 km

437 m

trees 73%

80 km

1,316 m

trees 71%

treesgrasslandcroplandartificial surfaces

← August Ribeirão Branco year-round climate October →Best places to visit in September

September weather nearby: Guapiara 24 km · Itapeva 29 km · Apiaí 33 km · Capão Bonito 49 km · Buri 50 km · Itaberá 55 km · Itararé 59 km · Sengés 72 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 Ribeirão Branco (-24.2208°, -48.7656°, elevation 873 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	23	12
2	23	12
3	23	12
4	23	12
5	23	12
6	23	12
7	23	12
8	23	13
9	23	13
10	23	13
11	23	13
12	23	13
13	23	13
14	23	13
15	23	13
16	23	13
17	23	13
18	23	13
19	23	13
20	23	13
21	23	13
22	23	13
23	23	13
24	23	13
25	23	13
26	23	13
27	23	13
28	23	13
29	23	13
30	23	14

	Clearer (%)	Cloudier (%)
1	55	45
2	54	46
3	53	47
4	51	49
5	50	50
6	49	51
7	47	53
8	46	54
9	45	55
10	43	57
11	42	58
12	42	58
13	41	59
14	41	59
15	40	60
16	39	61
17	38	62
18	38	62
19	37	63
20	36	64
21	35	65
22	33	67
23	32	68
24	32	68
25	31	69
26	30	70
27	29	71
28	28	72
29	27	73
30	27	73

	Rain chance (%)
1	26
2	27
3	27
4	28
5	28
6	29
7	30
8	30
9	31
10	31
11	31
12	32
13	33
14	33
15	34
16	35
17	36
18	37
19	38
20	40
21	41
22	42
23	42
24	43
25	44
26	45
27	45
28	46
29	46
30	46

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	50	41	9	0
2	49	41	9	0
3	48	42	10	0
4	47	42	11	0
5	46	43	11	0
6	45	43	12	0
7	44	44	12	0
8	43	44	13	0
9	42	45	13	0
10	41	45	13	0
11	40	46	14	0
12	39	47	14	0
13	38	47	15	1
14	37	47	15	1
15	36	47	16	1
16	36	47	16	1
17	35	47	17	1
18	35	47	17	1
19	34	47	18	1
20	34	47	19	1
21	33	46	20	1
22	33	46	21	1
23	32	45	22	1
24	31	44	23	1
25	31	44	24	1
26	30	43	26	2
27	29	42	27	2
28	29	41	29	2
29	28	40	30	2
30	28	39	31	2

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

	Clearer (%)	Cloudier (%)
1	55	45
2	54	46
3	53	47
4	51	49
5	50	50
6	49	51
7	47	53
8	46	54
9	45	55
10	43	57
11	42	58
12	42	58
13	41	59
14	41	59
15	40	60
16	39	61
17	38	62
18	38	62
19	37	63
20	36	64
21	35	65
22	33	67
23	32	68
24	32	68
25	31	69
26	30	70
27	29	71
28	28	72
29	27	73
30	27	73

	Rain chance (%)
1	26
2	27
3	27
4	28
5	28
6	29
7	30
8	30
9	31
10	31
11	31
12	32
13	33
14	33
15	34
16	35
17	36
18	37
19	38
20	40
21	41
22	42
23	42
24	43
25	44
26	45
27	45
28	46
29	46
30	46

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	50	41	9	0
2	49	41	9	0
3	48	42	10	0
4	47	42	11	0
5	46	43	11	0
6	45	43	12	0
7	44	44	12	0
8	43	44	13	0
9	42	45	13	0
10	41	45	13	0
11	40	46	14	0
12	39	47	14	0
13	38	47	15	1
14	37	47	15	1
15	36	47	16	1
16	36	47	16	1
17	35	47	17	1
18	35	47	17	1
19	34	47	18	1
20	34	47	19	1
21	33	46	20	1
22	33	46	21	1
23	32	45	22	1
24	31	44	23	1
25	31	44	24	1
26	30	43	26	2
27	29	42	27	2
28	29	41	29	2
29	28	40	30	2
30	28	39	31	2

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

	Clearer (%)	Cloudier (%)
1	55	45
2	54	46
3	53	47
4	51	49
5	50	50
6	49	51
7	47	53
8	46	54
9	45	55
10	43	57
11	42	58
12	42	58
13	41	59
14	41	59
15	40	60
16	39	61
17	38	62
18	38	62
19	37	63
20	36	64
21	35	65
22	33	67
23	32	68
24	32	68
25	31	69
26	30	70
27	29	71
28	28	72
29	27	73
30	27	73

	Rain chance (%)
1	26
2	27
3	27
4	28
5	28
6	29
7	30
8	30
9	31
10	31
11	31
12	32
13	33
14	33
15	34
16	35
17	36
18	37
19	38
20	40
21	41
22	42
23	42
24	43
25	44
26	45
27	45
28	46
29	46
30	46

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	50	41	9	0
2	49	41	9	0
3	48	42	10	0
4	47	42	11	0
5	46	43	11	0
6	45	43	12	0
7	44	44	12	0
8	43	44	13	0
9	42	45	13	0
10	41	45	13	0
11	40	46	14	0
12	39	47	14	0
13	38	47	15	1
14	37	47	15	1
15	36	47	16	1
16	36	47	16	1
17	35	47	17	1
18	35	47	17	1
19	34	47	18	1
20	34	47	19	1
21	33	46	20	1
22	33	46	21	1
23	32	45	22	1
24	31	44	23	1
25	31	44	24	1
26	30	43	26	2
27	29	42	27	2
28	29	41	29	2
29	28	40	30	2
30	28	39	31	2