Riacho de Santana weather in September

In September, Riacho de Santana sees average daytime highs of 33°C and overnight lows near 20°C, with 6 mm of rain across 1.3 wet days and about 11.9 hours of daylight. It is the 2nd-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 33°C in the first days to 34°C by the end. The sky is clear or mostly clear about 60% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 42 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Riacho de Santana's 3rd-clearest and 3rd-windiest month. For the whole year in context, see Riacho de Santana's year-round climate.

Daytime high: 33°; 2nd warmest
Overnight low: 20°; 4th coldest
Rainfall: 6 mm; 1.3 wet days
Daylight: 11 h 54 min; 5:48 AM – 5:44 PM
Cloud cover: 34%; 3rd clearest
Wind: 12 km/h; 3rd windiest
Solar energy: 6.55 kWh/m²
Travel score: 4.2; out of 10

← August Riacho de Santana 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

Highs climb over the month, from about 33°C in the first days to 34°C by the end.

A typical September day in Riacho de Santana reaches about 33°C in the afternoon and slips back to 20°C overnight — a 14°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 36°C. Set against its neighbours, September runs about 2°C warmer than August and on par with 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)	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	34	34	34	34	34	34	34	34	34	34	34	34	34	34
Avg low (°C)	19	19	19	19	19	19	19	19	19	19	19	20	20	20	20	20	20	20	20	20	20	20	21	21	21	21	21	21	21	21

	Avg high (°C)	Avg low (°C)
1	33	19
2	33	19
3	33	19
4	33	19
5	33	19
6	33	19
7	33	19
8	33	19
9	33	19
10	33	19
11	33	19
12	33	20
13	33	20
14	33	20
15	33	20
16	33	20
17	34	20
18	34	20
19	34	20
20	34	20
21	34	20
22	34	20
23	34	21
24	34	21
25	34	21
26	34	21
27	34	21
28	34	21
29	34	21
30	34	21

How September really feels in Riacho de Santana

Once humidity and wind are folded in, September averages 30 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

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Riacho de Santana weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 9th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	31° / 22°	106	11.6	12.7	4.1
Feb	32° / 22°	77	10.8	12.5	4.0
Mar	31° / 22°	96	11.7	12.1	4.1
Apr	31° / 21°	43	5.9	11.7	4.8
May	31° / 20°	8	1.6	11.4	5.5
Jun	30° / 19°	1	0.4	11.2	6.3
Jul	30° / 18°	0	0.1	11.3	6.5
Aug	31° / 18°	1	0.1	11.5	5.7
Sep	33° / 20°	6	1.3	11.9	4.2
Oct	34° / 22°	36	5.3	12.3	3.4
Nov	32° / 22°	129	12.9	12.6	3.7
Dec	31° / 22°	107	12.9	12.8	4.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 60% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 19%. 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 (%)	85	85	85	85	85	84	84	84	83	83	83	83	82	81	81	81	81	81	81	80	79	79	78	78	78	77	77	77	75	75
Cloudier (%)	15	15	15	15	15	16	16	16	17	17	17	17	18	19	19	19	19	19	19	20	21	21	22	22	22	23	23	23	25	25

	Clearer (%)	Cloudier (%)
1	85	15
2	85	15
3	85	15
4	85	15
5	85	15
6	84	16
7	84	16
8	84	16
9	83	17
10	83	17
11	83	17
12	83	17
13	82	18
14	81	19
15	81	19
16	81	19
17	81	19
18	81	19
19	81	19
20	80	20
21	79	21
22	79	21
23	78	22
24	78	22
25	78	22
26	77	23
27	77	23
28	77	23
29	75	25
30	75	25

Chance of precipitation in September

Any precipitation

Riacho de Santana gets around 6 mm of rain over 1.3 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 4% and peaks near 8% 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 (%)	1	1	1	1	1	1	1	1	1	2	2	2	2	3	3	4	4	5	6	6	6	7	7	7	7	8	8	8	8	8

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

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 50% 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 (%)	60	60	60	60	60	60	60	60	60	60	59	58	58	56	54	54	52	51	48	47	45	43	41	39	37	36	34	33	32	31
Comfortable (%)	35	35	35	35	35	35	36	36	36	36	36	37	37	38	38	38	39	39	40	40	41	41	42	43	43	44	45	45	46	46
Humid (%)	5	5	5	5	5	5	4	4	4	4	5	5	5	6	7	7	8	9	10	12	13	14	15	16	16	17	18	18	18	18
Muggy (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1	2	2	2	2	2	3	3	3	3	4	4	4

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	60	35	5	0
2	60	35	5	0
3	60	35	5	0
4	60	35	5	0
5	60	35	5	0
6	60	35	5	0
7	60	36	4	0
8	60	36	4	0
9	60	36	4	0
10	60	36	4	0
11	59	36	5	0
12	58	37	5	0
13	58	37	5	0
14	56	38	6	0
15	54	38	7	1
16	54	38	7	1
17	52	39	8	1
18	51	39	9	1
19	48	40	10	2
20	47	40	12	2
21	45	41	13	2
22	43	41	14	2
23	41	42	15	2
24	39	43	16	3
25	37	43	16	3
26	36	44	17	3
27	34	45	18	3
28	33	45	18	4
29	32	46	18	4
30	31	46	18	4

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 12 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)	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	11	11	11	11	11	11	11	11	11	11	11	11
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	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	12	light breeze
2	12	light breeze
3	12	light breeze
4	12	light breeze
5	12	light breeze
6	12	light breeze
7	12	light breeze
8	12	calm
9	12	calm
10	12	calm
11	12	calm
12	12	calm
13	12	calm
14	12	calm
15	12	calm
16	12	calm
17	12	calm
18	12	calm
19	11	calm
20	11	calm
21	11	calm
22	11	calm
23	11	calm
24	11	calm
25	11	calm
26	11	calm
27	11	calm
28	11	calm
29	11	calm
30	11	calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 42 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over September. Sunrise moves from 5:59 AM to 5:38 AM, and sunset from 5:43 PM to 5:44 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)	11.7	11.7	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.9	11.9	11.9	11.9	11.9	11.9	11.9	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.1	12.1	12.1	12.1	12.1
Sunrise (AM)	5:59	5:59	5:58	5:57	5:57	5:56	5:55	5:54	5:54	5:53	5:52	5:51	5:51	5:50	5:49	5:48	5:48	5:47	5:46	5:45	5:45	5:44	5:43	5:42	5:42	5:41	5:40	5:39	5:39	5:38
Sunset (PM)	5:43	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.7	5:59	5:43
2	11.7	5:59	5:44
3	11.8	5:58	5:44
4	11.8	5:57	5:44
5	11.8	5:57	5:44
6	11.8	5:56	5:44
7	11.8	5:55	5:44
8	11.8	5:54	5:44
9	11.8	5:54	5:44
10	11.8	5:53	5:44
11	11.9	5:52	5:44
12	11.9	5:51	5:44
13	11.9	5:51	5:44
14	11.9	5:50	5:44
15	11.9	5:49	5:44
16	11.9	5:48	5:44
17	11.9	5:48	5:44
18	12.0	5:47	5:44
19	12.0	5:46	5:44
20	12.0	5:45	5:44
21	12.0	5:45	5:44
22	12.0	5:44	5:44
23	12.0	5:43	5:44
24	12.0	5:42	5:44
25	12.0	5:42	5:44
26	12.1	5:41	5:44
27	12.1	5:40	5:44
28	12.1	5:39	5:44
29	12.1	5:39	5:44
30	12.1	5:38	5:44

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.55 kWh/m².

For context, solar energy here swings from a low near 4.78 kWh/m² to a high of 6.61 kWh/m² in October across the year — September's 6.55 kWh/m² sits near the top of that range.

	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)	6.3	6.3	6.3	6.4	6.4	6.4	6.4	6.5	6.5	6.5	6.5	6.5	6.5	6.6	6.6	6.6	6.6	6.6	6.6	6.6	6.6	6.6	6.6	6.6	6.7	6.7	6.7	6.7	6.7	6.7
Level	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	6.3	Intense
2	6.3	Intense
3	6.3	Intense
4	6.4	Intense
5	6.4	Intense
6	6.4	Intense
7	6.4	Intense
8	6.5	Intense
9	6.5	Intense
10	6.5	Intense
11	6.5	Intense
12	6.5	Intense
13	6.5	Intense
14	6.6	Intense
15	6.6	Intense
16	6.6	Intense
17	6.6	Intense
18	6.6	Intense
19	6.6	Intense
20	6.6	Intense
21	6.6	Intense
22	6.6	Intense
23	6.6	Intense
24	6.6	Intense
25	6.7	Intense
26	6.7	Intense
27	6.7	Intense
28	6.7	Intense
29	6.7	Intense
30	6.7	Intense

Planning a trip in September

Hazard calendar for Riacho de Santana

In seasonPeak

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

Riacho de Santana's rainy season runs November–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 Riacho de Santana?

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

4.2

Sightseeing

6th-best month of the year

7.7

Beach & pool

5th-best month of the year

September is a reasonable time to visit Riacho de Santana for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Riacho de Santana in September

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

In September, Riacho de Santana sees daytime highs around 33°C and nights near 20°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Riacho de Santana in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Riacho de Santana peaks around February 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 9 (very 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)	14	16	15	12	10	9	9	10	12	13	14	13
Level	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Very high	Very high	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	14	Extreme
Feb	16	Extreme
Mar	15	Extreme
Apr	12	Extreme
May	10	Very high
Jun	9	Very high
Jul	9	Very high
Aug	10	Very high
Sep	12	Extreme
Oct	13	Extreme
Nov	14	Extreme
Dec	13	Extreme

Location & terrain

Where is Riacho de Santana?

Riacho de Santana sits at 13.6°S, 42.9°W, 626 m above sea level, in Brazil. The nearest listed city is Igaporã, 30 km away.

Topography around Riacho de Santana

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Riacho de Santana.

Within 3 km, the terrain around Riacho de Santana has only modest variations in elevation — a maximum elevation change of 247 m around an average of 637 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 710 m; within 80 km, large variations in elevation — a maximum elevation change of 813 m.

The land around Riacho de Santana is covered by shrubs (31%), trees (29%) and grassland (26%) within 3 km, shrubs (40%), trees (32%) and grassland (20%) within 16 km, and shrubs (47%) and trees (21%) within 80 km.

3 km

247 m

shrubs 31%

16 km

710 m

shrubs 40%

80 km

813 m

shrubs 47%

treesshrubsgrasslandcroplandartificial surfaces

← August Riacho de Santana year-round climate October →Best places to visit in September

September weather nearby: Igaporã 30 km · Tanque Novo 49 km · Bom Jesus da Lapa 65 km · Serra do Ramalho 70 km · Guanambi 70 km · Macaúbas 71 km · Caetité 72 km · Palmas de Monte Alto 77 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 Riacho de Santana (-13.6092°, -42.9389°, elevation 626 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	33	19
2	33	19
3	33	19
4	33	19
5	33	19
6	33	19
7	33	19
8	33	19
9	33	19
10	33	19
11	33	19
12	33	20
13	33	20
14	33	20
15	33	20
16	33	20
17	34	20
18	34	20
19	34	20
20	34	20
21	34	20
22	34	20
23	34	21
24	34	21
25	34	21
26	34	21
27	34	21
28	34	21
29	34	21
30	34	21

	Clearer (%)	Cloudier (%)
1	85	15
2	85	15
3	85	15
4	85	15
5	85	15
6	84	16
7	84	16
8	84	16
9	83	17
10	83	17
11	83	17
12	83	17
13	82	18
14	81	19
15	81	19
16	81	19
17	81	19
18	81	19
19	81	19
20	80	20
21	79	21
22	79	21
23	78	22
24	78	22
25	78	22
26	77	23
27	77	23
28	77	23
29	75	25
30	75	25

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

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	60	35	5	0
2	60	35	5	0
3	60	35	5	0
4	60	35	5	0
5	60	35	5	0
6	60	35	5	0
7	60	36	4	0
8	60	36	4	0
9	60	36	4	0
10	60	36	4	0
11	59	36	5	0
12	58	37	5	0
13	58	37	5	0
14	56	38	6	0
15	54	38	7	1
16	54	38	7	1
17	52	39	8	1
18	51	39	9	1
19	48	40	10	2
20	47	40	12	2
21	45	41	13	2
22	43	41	14	2
23	41	42	15	2
24	39	43	16	3
25	37	43	16	3
26	36	44	17	3
27	34	45	18	3
28	33	45	18	4
29	32	46	18	4
30	31	46	18	4

	Avg high (°C)	Avg low (°C)
1	33	19
2	33	19
3	33	19
4	33	19
5	33	19
6	33	19
7	33	19
8	33	19
9	33	19
10	33	19
11	33	19
12	33	20
13	33	20
14	33	20
15	33	20
16	33	20
17	34	20
18	34	20
19	34	20
20	34	20
21	34	20
22	34	20
23	34	21
24	34	21
25	34	21
26	34	21
27	34	21
28	34	21
29	34	21
30	34	21

	Clearer (%)	Cloudier (%)
1	85	15
2	85	15
3	85	15
4	85	15
5	85	15
6	84	16
7	84	16
8	84	16
9	83	17
10	83	17
11	83	17
12	83	17
13	82	18
14	81	19
15	81	19
16	81	19
17	81	19
18	81	19
19	81	19
20	80	20
21	79	21
22	79	21
23	78	22
24	78	22
25	78	22
26	77	23
27	77	23
28	77	23
29	75	25
30	75	25

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

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	60	35	5	0
2	60	35	5	0
3	60	35	5	0
4	60	35	5	0
5	60	35	5	0
6	60	35	5	0
7	60	36	4	0
8	60	36	4	0
9	60	36	4	0
10	60	36	4	0
11	59	36	5	0
12	58	37	5	0
13	58	37	5	0
14	56	38	6	0
15	54	38	7	1
16	54	38	7	1
17	52	39	8	1
18	51	39	9	1
19	48	40	10	2
20	47	40	12	2
21	45	41	13	2
22	43	41	14	2
23	41	42	15	2
24	39	43	16	3
25	37	43	16	3
26	36	44	17	3
27	34	45	18	3
28	33	45	18	4
29	32	46	18	4
30	31	46	18	4

	Avg high (°C)	Avg low (°C)
1	33	19
2	33	19
3	33	19
4	33	19
5	33	19
6	33	19
7	33	19
8	33	19
9	33	19
10	33	19
11	33	19
12	33	20
13	33	20
14	33	20
15	33	20
16	33	20
17	34	20
18	34	20
19	34	20
20	34	20
21	34	20
22	34	20
23	34	21
24	34	21
25	34	21
26	34	21
27	34	21
28	34	21
29	34	21
30	34	21

	Clearer (%)	Cloudier (%)
1	85	15
2	85	15
3	85	15
4	85	15
5	85	15
6	84	16
7	84	16
8	84	16
9	83	17
10	83	17
11	83	17
12	83	17
13	82	18
14	81	19
15	81	19
16	81	19
17	81	19
18	81	19
19	81	19
20	80	20
21	79	21
22	79	21
23	78	22
24	78	22
25	78	22
26	77	23
27	77	23
28	77	23
29	75	25
30	75	25

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

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	60	35	5	0
2	60	35	5	0
3	60	35	5	0
4	60	35	5	0
5	60	35	5	0
6	60	35	5	0
7	60	36	4	0
8	60	36	4	0
9	60	36	4	0
10	60	36	4	0
11	59	36	5	0
12	58	37	5	0
13	58	37	5	0
14	56	38	6	0
15	54	38	7	1
16	54	38	7	1
17	52	39	8	1
18	51	39	9	1
19	48	40	10	2
20	47	40	12	2
21	45	41	13	2
22	43	41	14	2
23	41	42	15	2
24	39	43	16	3
25	37	43	16	3
26	36	44	17	3
27	34	45	18	3
28	33	45	18	4
29	32	46	18	4
30	31	46	18	4