São Gabriel da Cachoeira weather in September

In September, São Gabriel da Cachoeira sees average daytime highs of 31°C and overnight lows near 23°C, with 173 mm of rain across 26 wet days and about 12 hours of daylight. It is the 2nd-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 7% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 hours at the start of September to 12 hours by month's end. Set against the rest of the year, September is São Gabriel da Cachoeira's 2nd-clearest and 5th-windiest month. For the whole year in context, see São Gabriel da Cachoeira's year-round climate.

Daytime high: 31°; 2nd warmest
Overnight low: 23°; 4th coldest
Rainfall: 173 mm; 26 wet days
Daylight: 12 hours; 6:23 AM – 6:23 PM
Cloud cover: 73%; 2nd clearest
Wind: 4 km/h; 5th windiest
Solar energy: 5.11 kWh/m²
Travel score: 2.9; out of 10

São Gabriel da Cachoeira is human settlement in Brazil.

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

← August São Gabriel da Cachoeira 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 31°C through the month.

A typical September day in São Gabriel da Cachoeira reaches about 31°C in the afternoon and slips back to 23°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°C. Set against its neighbours, September runs about 1°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)	30	30	30	30	30	30	30	30	30	30	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31
Avg low (°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 high (°C)	Avg low (°C)
1	30	23
2	30	23
3	30	23
4	30	23
5	30	23
6	30	23
7	30	23
8	30	23
9	30	23
10	30	23
11	31	23
12	31	23
13	31	23
14	31	23
15	31	23
16	31	23
17	31	23
18	31	23
19	31	23
20	31	23
21	31	23
22	31	23
23	31	23
24	31	23
25	31	23
26	31	23
27	31	23
28	31	23
29	31	23
30	31	23

How September really feels in São Gabriel da Cachoeira

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.

São Gabriel da Cachoeira weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 12th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	30° / 23°	258	27.6	12	2.8
Feb	30° / 23°	251	24.4	12	2.9
Mar	30° / 23°	301	28.5	12	2.7
Apr	30° / 23°	333	28.1	12	2.7
May	29° / 23°	368	29.7	12	2.9
Jun	29° / 23°	321	28.7	12	3.0
Jul	29° / 22°	260	28.7	12	3.2
Aug	30° / 22°	199	27.4	12	3.1
Sep	31° / 23°	173	26	12	2.9
Oct	31° / 23°	192	26.4	12	2.8
Nov	31° / 23°	212	27.4	12	2.7
Dec	30° / 23°	248	29.2	12	2.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 7% 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 73%.

	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 (%)	31	30	30	30	30	30	30	30	29	29	29	28	28	28	27	27	27	27	27	26	26	26	26	27	27	25	25	25	25	25
Cloudier (%)	69	70	70	70	70	70	70	70	71	71	71	72	72	72	73	73	73	73	73	74	74	74	74	73	73	75	75	75	75	75

	Clearer (%)	Cloudier (%)
1	31	69
2	30	70
3	30	70
4	30	70
5	30	70
6	30	70
7	30	70
8	30	70
9	29	71
10	29	71
11	29	71
12	28	72
13	28	72
14	28	72
15	27	73
16	27	73
17	27	73
18	27	73
19	27	73
20	26	74
21	26	74
22	26	74
23	26	74
24	27	73
25	27	73
26	25	75
27	25	75
28	25	75
29	25	75
30	25	75

Chance of precipitation in September

Any precipitation

São Gabriel da Cachoeira gets around 173 mm of rain over 26 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 87% and peaks near 88% 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 (%)	88	88	88	88	88	88	88	88	88	88	87	87	87	87	87	87	86	86	86	86	86	86	86	85	85	85	84	84	84	84

	Rain chance (%)
1	88
2	88
3	88
4	88
5	88
6	88
7	88
8	88
9	88
10	88
11	87
12	87
13	87
14	87
15	87
16	87
17	86
18	86
19	86
20	86
21	86
22	86
23	86
24	85
25	85
26	85
27	84
28	84
29	84
30	84

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 58% of days. Sticky, muggy-or-worse air turns up on roughly 100% 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
Oppressive (%)	68	67	67	66	66	65	65	64	64	63	62	61	60	59	58	57	56	56	55	54	53	53	52	51	50	50	49	48	48	47
Miserable (%)	32	33	33	34	34	35	35	36	36	37	38	39	40	41	42	43	44	44	45	46	47	47	48	49	50	50	51	52	52	53

	Oppressive (%)	Miserable (%)
1	68	32
2	67	33
3	67	33
4	66	34
5	66	34
6	65	35
7	65	35
8	64	36
9	64	36
10	63	37
11	62	38
12	61	39
13	60	40
14	59	41
15	58	42
16	57	43
17	56	44
18	56	44
19	55	45
20	54	46
21	53	47
22	53	47
23	52	48
24	51	49
25	50	50
26	50	50
27	49	51
28	48	52
29	48	52
30	47	53

Wind in September

Winds average 4 km/h in September.

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

Sunrise & sunset in September

DaylightNight

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

Days grow by about 0 minutes over September. Sunrise moves from 6:28 AM to 6:18 AM, and sunset from 6:28 PM to 6:18 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)	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0
Sunrise (AM)	6:28	6:28	6:27	6:27	6:27	6:26	6:26	6:26	6:25	6:25	6:25	6:24	6:24	6:23	6:23	6:23	6:22	6:22	6:22	6:21	6:21	6:20	6:20	6:20	6:19	6:19	6:19	6:18	6:18	6:18
Sunset (PM)	6:28	6:28	6:27	6:27	6:27	6:26	6:26	6:26	6:25	6:25	6:24	6:24	6:24	6:23	6:23	6:23	6:22	6:22	6:22	6:21	6:21	6:20	6:20	6:20	6:19	6:19	6:19	6:18	6:18	6:18

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.0	6:28	6:28
2	12.0	6:28	6:28
3	12.0	6:27	6:27
4	12.0	6:27	6:27
5	12.0	6:27	6:27
6	12.0	6:26	6:26
7	12.0	6:26	6:26
8	12.0	6:26	6:26
9	12.0	6:25	6:25
10	12.0	6:25	6:25
11	12.0	6:25	6:24
12	12.0	6:24	6:24
13	12.0	6:24	6:24
14	12.0	6:23	6:23
15	12.0	6:23	6:23
16	12.0	6:23	6:23
17	12.0	6:22	6:22
18	12.0	6:22	6:22
19	12.0	6:22	6:22
20	12.0	6:21	6:21
21	12.0	6:21	6:21
22	12.0	6:20	6:20
23	12.0	6:20	6:20
24	12.0	6:20	6:20
25	12.0	6:19	6:19
26	12.0	6:19	6:19
27	12.0	6:19	6:19
28	12.0	6:18	6:18
29	12.0	6:18	6:18
30	12.0	6:18	6:18

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.11 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.71 kWh/m² to a high of 5.11 kWh/m² in September across the year — September's 5.11 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)	4.9	4.9	4.9	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.1	5.1	5.1	5.1	5.1	5.1	5.1	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2
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	4.9	Bright
2	4.9	Bright
3	4.9	Bright
4	5.0	Bright
5	5.0	Bright
6	5.0	Bright
7	5.0	Bright
8	5.0	Bright
9	5.0	Bright
10	5.0	Bright
11	5.0	Bright
12	5.1	Bright
13	5.1	Bright
14	5.1	Bright
15	5.1	Bright
16	5.1	Bright
17	5.1	Bright
18	5.1	Bright
19	5.2	Bright
20	5.2	Bright
21	5.2	Bright
22	5.2	Bright
23	5.2	Bright
24	5.2	Bright
25	5.2	Bright
26	5.2	Bright
27	5.2	Bright
28	5.2	Bright
29	5.2	Bright
30	5.2	Bright

Planning a trip in September

Is September a good time to visit São Gabriel da Cachoeira?

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

2.9

Sightseeing

4th-best month of the year

4.1

Beach & pool

2nd-best month of the year

September is a weaker month for outdoor sightseeing in São Gabriel da Cachoeira.

What to pack for São Gabriel da Cachoeira in September

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

In September, São Gabriel da Cachoeira sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.

light clothesrain gearsun protection

UV index in São Gabriel da Cachoeira 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 São Gabriel da Cachoeira peaks around February 14 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 22 at about 11 (extreme).

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	14	14	13	13	11	11	11	12	12	12	12
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	14	Extreme
Feb	14	Extreme
Mar	14	Extreme
Apr	13	Extreme
May	13	Extreme
Jun	11	Extreme
Jul	11	Extreme
Aug	11	Extreme
Sep	12	Extreme
Oct	12	Extreme
Nov	12	Extreme
Dec	12	Extreme

Air quality in São Gabriel da Cachoeira in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in São Gabriel da Cachoeira is worst in March — around 20 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (June, 10 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	14	17	20	17	11	10	11	13	13	13	13	13
Level	Moderate	Moderate	Moderate	Moderate	Good	Good	Good	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	14	Moderate
Feb	17	Moderate
Mar	20	Moderate
Apr	17	Moderate
May	11	Good
Jun	10	Good
Jul	11	Good
Aug	13	Moderate
Sep	13	Moderate
Oct	13	Moderate
Nov	13	Moderate
Dec	13	Moderate

Location & terrain

Where is São Gabriel da Cachoeira?

São Gabriel da Cachoeira sits at 0.1°S, 67.1°W, 74 m above sea level, in Brazil. The nearest listed city is Maraã, 256 km away.

Topography around São Gabriel da Cachoeira

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São Gabriel da Cachoeira.

Within 3 km, the terrain around São Gabriel da Cachoeira has only modest variations in elevation — a maximum elevation change of 150 m around an average of 74 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 522 m; within 80 km, large variations in elevation — a maximum elevation change of 985 m.

The land around São Gabriel da Cachoeira is covered by trees (71%) within 3 km, trees (91%) within 16 km, and trees (98%) within 80 km.

3 km

150 m

trees 71%

16 km

522 m

trees 91%

80 km

985 m

trees 98%

treesgrasslandartificial surfaceswater

← August São Gabriel da Cachoeira year-round climate October →Best places to visit in September

September weather nearby: Maraã 256 km · Fonte Boa 288 km · Tonantins 317 km · Santo Antônio do Içá 345 km · Mitú 382 km · Uarini 388 km · São Paulo de Olivença 413 km · Alvarães 428 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 São Gabriel da Cachoeira (-0.1181°, -67.0853°, elevation 74 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. 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	30	23
2	30	23
3	30	23
4	30	23
5	30	23
6	30	23
7	30	23
8	30	23
9	30	23
10	30	23
11	31	23
12	31	23
13	31	23
14	31	23
15	31	23
16	31	23
17	31	23
18	31	23
19	31	23
20	31	23
21	31	23
22	31	23
23	31	23
24	31	23
25	31	23
26	31	23
27	31	23
28	31	23
29	31	23
30	31	23

	Clearer (%)	Cloudier (%)
1	31	69
2	30	70
3	30	70
4	30	70
5	30	70
6	30	70
7	30	70
8	30	70
9	29	71
10	29	71
11	29	71
12	28	72
13	28	72
14	28	72
15	27	73
16	27	73
17	27	73
18	27	73
19	27	73
20	26	74
21	26	74
22	26	74
23	26	74
24	27	73
25	27	73
26	25	75
27	25	75
28	25	75
29	25	75
30	25	75

	Rain chance (%)
1	88
2	88
3	88
4	88
5	88
6	88
7	88
8	88
9	88
10	88
11	87
12	87
13	87
14	87
15	87
16	87
17	86
18	86
19	86
20	86
21	86
22	86
23	86
24	85
25	85
26	85
27	84
28	84
29	84
30	84

	Oppressive (%)	Miserable (%)
1	68	32
2	67	33
3	67	33
4	66	34
5	66	34
6	65	35
7	65	35
8	64	36
9	64	36
10	63	37
11	62	38
12	61	39
13	60	40
14	59	41
15	58	42
16	57	43
17	56	44
18	56	44
19	55	45
20	54	46
21	53	47
22	53	47
23	52	48
24	51	49
25	50	50
26	50	50
27	49	51
28	48	52
29	48	52
30	47	53

	Avg high (°C)	Avg low (°C)
1	30	23
2	30	23
3	30	23
4	30	23
5	30	23
6	30	23
7	30	23
8	30	23
9	30	23
10	30	23
11	31	23
12	31	23
13	31	23
14	31	23
15	31	23
16	31	23
17	31	23
18	31	23
19	31	23
20	31	23
21	31	23
22	31	23
23	31	23
24	31	23
25	31	23
26	31	23
27	31	23
28	31	23
29	31	23
30	31	23

	Clearer (%)	Cloudier (%)
1	31	69
2	30	70
3	30	70
4	30	70
5	30	70
6	30	70
7	30	70
8	30	70
9	29	71
10	29	71
11	29	71
12	28	72
13	28	72
14	28	72
15	27	73
16	27	73
17	27	73
18	27	73
19	27	73
20	26	74
21	26	74
22	26	74
23	26	74
24	27	73
25	27	73
26	25	75
27	25	75
28	25	75
29	25	75
30	25	75

	Rain chance (%)
1	88
2	88
3	88
4	88
5	88
6	88
7	88
8	88
9	88
10	88
11	87
12	87
13	87
14	87
15	87
16	87
17	86
18	86
19	86
20	86
21	86
22	86
23	86
24	85
25	85
26	85
27	84
28	84
29	84
30	84

	Oppressive (%)	Miserable (%)
1	68	32
2	67	33
3	67	33
4	66	34
5	66	34
6	65	35
7	65	35
8	64	36
9	64	36
10	63	37
11	62	38
12	61	39
13	60	40
14	59	41
15	58	42
16	57	43
17	56	44
18	56	44
19	55	45
20	54	46
21	53	47
22	53	47
23	52	48
24	51	49
25	50	50
26	50	50
27	49	51
28	48	52
29	48	52
30	47	53

	Avg high (°C)	Avg low (°C)
1	30	23
2	30	23
3	30	23
4	30	23
5	30	23
6	30	23
7	30	23
8	30	23
9	30	23
10	30	23
11	31	23
12	31	23
13	31	23
14	31	23
15	31	23
16	31	23
17	31	23
18	31	23
19	31	23
20	31	23
21	31	23
22	31	23
23	31	23
24	31	23
25	31	23
26	31	23
27	31	23
28	31	23
29	31	23
30	31	23

	Clearer (%)	Cloudier (%)
1	31	69
2	30	70
3	30	70
4	30	70
5	30	70
6	30	70
7	30	70
8	30	70
9	29	71
10	29	71
11	29	71
12	28	72
13	28	72
14	28	72
15	27	73
16	27	73
17	27	73
18	27	73
19	27	73
20	26	74
21	26	74
22	26	74
23	26	74
24	27	73
25	27	73
26	25	75
27	25	75
28	25	75
29	25	75
30	25	75

	Rain chance (%)
1	88
2	88
3	88
4	88
5	88
6	88
7	88
8	88
9	88
10	88
11	87
12	87
13	87
14	87
15	87
16	87
17	86
18	86
19	86
20	86
21	86
22	86
23	86
24	85
25	85
26	85
27	84
28	84
29	84
30	84

	Oppressive (%)	Miserable (%)
1	68	32
2	67	33
3	67	33
4	66	34
5	66	34
6	65	35
7	65	35
8	64	36
9	64	36
10	63	37
11	62	38
12	61	39
13	60	40
14	59	41
15	58	42
16	57	43
17	56	44
18	56	44
19	55	45
20	54	46
21	53	47
22	53	47
23	52	48
24	51	49
25	50	50
26	50	50
27	49	51
28	48	52
29	48	52
30	47	53