Belém de São Francisco weather in September

In September, Belém de São Francisco sees average daytime highs of 32°C and overnight lows near 21°C, with 2 mm of rain across 0.3 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 31°C in the first days to 33°C by the end. The sky is clear or mostly clear about 55% of the time in September, and the air most often feels humid.

Daylight stretches from about 11 h 48 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Belém de São Francisco's 2nd-clearest and 1st-windiest month. For the whole year in context, see Belém de São Francisco's year-round climate.

Daytime high: 32°; 8th warmest
Overnight low: 21°; 3rd coldest
Rainfall: 2 mm; 0.3 wet days
Daylight: 12 hours; 5:32 AM – 5:29 PM
Cloud cover: 37%; 2nd clearest
Wind: 20 km/h; 1st windiest
Solar energy: 6.13 kWh/m²
Travel score: 5.0; out of 10

Belém de São Francisco is human settlement in Brazil.

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

← August Belém de São Francisco 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 31°C in the first days to 33°C by the end.

A typical September day in Belém de São Francisco reaches about 32°C in the afternoon and slips back to 21°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 34°C. Set against its neighbours, September runs about 2°C warmer than August and about 2°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)	31	31	31	31	31	31	32	32	32	32	32	32	32	32	32	32	32	32	33	33	33	33	33	33	33	33	33	33	33	33
Avg low (°C)	20	20	20	20	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	22	22	22

	Avg high (°C)	Avg low (°C)
1	31	20
2	31	20
3	31	20
4	31	20
5	31	21
6	31	21
7	32	21
8	32	21
9	32	21
10	32	21
11	32	21
12	32	21
13	32	21
14	32	21
15	32	21
16	32	21
17	32	21
18	32	21
19	33	21
20	33	21
21	33	21
22	33	21
23	33	21
24	33	21
25	33	21
26	33	21
27	33	21
28	33	22
29	33	22
30	33	22

How September really feels in Belém de São Francisco

Once humidity and wind are folded in, September averages 22 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.

Belém de São Francisco weather by month

How September compares with the rest of the year at a glance. September is the 8th-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	34° / 24°	64	7.3	12.5	3.3
Feb	34° / 24°	60	8.5	12.3	3.3
Mar	33° / 24°	80	10.3	12.1	3.4
Apr	32° / 23°	44	7.6	11.8	4.0
May	31° / 22°	20	4.5	11.6	5.0
Jun	30° / 21°	10	2.4	11.5	6.1
Jul	29° / 20°	6	1.5	11.5	6.4
Aug	30° / 20°	4	0.9	11.7	6.1
Sep	32° / 21°	2	0.3	11.9	5.0
Oct	34° / 22°	7	1	12.2	3.8
Nov	35° / 24°	13	2.2	12.4	3.1
Dec	35° / 24°	29	3.7	12.5	3.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 55% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 26%. Skies tend to open up 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 (%)	64	63	64	64	65	66	66	67	67	68	69	70	71	72	73	74	75	77	78	79	80	80	81	81	82	82	83	83	82	83
Cloudier (%)	36	37	36	36	35	34	34	33	33	32	31	30	29	28	27	26	25	23	22	21	20	20	19	19	18	18	17	17	18	17

	Clearer (%)	Cloudier (%)
1	64	36
2	63	37
3	64	36
4	64	36
5	65	35
6	66	34
7	66	34
8	67	33
9	67	33
10	68	32
11	69	31
12	70	30
13	71	29
14	72	28
15	73	27
16	74	26
17	75	25
18	77	23
19	78	22
20	79	21
21	80	20
22	80	20
23	81	19
24	81	19
25	82	18
26	82	18
27	83	17
28	83	17
29	82	18
30	83	17

Chance of precipitation in September

Any precipitation

Belém de São Francisco gets around 2 mm of rain over 0.3 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 1% and peaks near 2% 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 (%)	2	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	0	0	0	0	0	0	1	1	1	1

	Rain chance (%)
1	2
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	1
12	1
13	1
14	1
15	1
16	1
17	1
18	1
19	1
20	1
21	0
22	0
23	0
24	0
25	0
26	0
27	1
28	1
29	1
30	1

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 76% of days. Sticky, muggy-or-worse air turns up on roughly 16% 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
Comfortable (%)	6	6	6	6	7	7	8	8	8	8	9	9	9	9	9	9	9	9	9	9	8	8	8	8	8	8	8	8	8	9
Humid (%)	79	79	79	79	78	78	76	76	76	75	74	74	74	74	74	74	74	75	75	75	76	76	76	76	76	75	75	75	75	73
Muggy (%)	15	15	15	15	15	15	16	16	16	17	17	17	17	17	17	17	17	16	16	16	16	16	16	16	16	17	17	17	17	18

	Comfortable (%)	Humid (%)	Muggy (%)
1	6	79	15
2	6	79	15
3	6	79	15
4	6	79	15
5	7	78	15
6	7	78	15
7	8	76	16
8	8	76	16
9	8	76	16
10	8	75	17
11	9	74	17
12	9	74	17
13	9	74	17
14	9	74	17
15	9	74	17
16	9	74	17
17	9	74	17
18	9	75	16
19	9	75	16
20	9	75	16
21	8	76	16
22	8	76	16
23	8	76	16
24	8	76	16
25	8	76	16
26	8	75	17
27	8	75	17
28	8	75	17
29	8	75	17
30	9	73	18

Wind in September

Winds average 20 km/h in September, the windiest month of the year.

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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 48 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 18 minutes over September. Sunrise moves from 5:41 AM to 5:23 AM, and sunset from 5:30 PM to 5:27 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)	11.8	11.8	11.8	11.9	11.9	11.9	11.9	11.9	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	12.0	12.0	12.0	12.0	12.1	12.1	12.1
Sunrise (AM)	5:41	5:40	5:40	5:39	5:38	5:38	5:37	5:37	5:36	5:35	5:35	5:34	5:33	5:33	5:32	5:32	5:31	5:30	5:30	5:29	5:29	5:28	5:27	5:27	5:26	5:25	5:25	5:24	5:24	5:23
Sunset (PM)	5:30	5:30	5:30	5:30	5:30	5:30	5:30	5:30	5:30	5:30	5:29	5:29	5:29	5:29	5:29	5:29	5:29	5:29	5:28	5:28	5:28	5:28	5:28	5:28	5:28	5:28	5:27	5:27	5:27	5:27

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.8	5:41	5:30
2	11.8	5:40	5:30
3	11.8	5:40	5:30
4	11.9	5:39	5:30
5	11.9	5:38	5:30
6	11.9	5:38	5:30
7	11.9	5:37	5:30
8	11.9	5:37	5:30
9	11.9	5:36	5:30
10	11.9	5:35	5:30
11	11.9	5:35	5:29
12	11.9	5:34	5:29
13	11.9	5:33	5:29
14	11.9	5:33	5:29
15	11.9	5:32	5:29
16	12.0	5:32	5:29
17	12.0	5:31	5:29
18	12.0	5:30	5:29
19	12.0	5:30	5:28
20	12.0	5:29	5:28
21	12.0	5:29	5:28
22	12.0	5:28	5:28
23	12.0	5:27	5:28
24	12.0	5:27	5:28
25	12.0	5:26	5:28
26	12.0	5:25	5:28
27	12.0	5:25	5:27
28	12.1	5:24	5:27
29	12.1	5:24	5:27
30	12.1	5:23	5:27

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.13 kWh/m².

For context, solar energy here swings from a low near 4.02 kWh/m² to a high of 6.92 kWh/m² in November across the year — September's 6.13 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)	5.5	5.6	5.6	5.6	5.7	5.7	5.7	5.8	5.8	5.8	5.9	5.9	6.0	6.0	6.0	6.1	6.2	6.2	6.3	6.3	6.4	6.4	6.5	6.5	6.6	6.6	6.6	6.7	6.7	6.7
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	5.5	Bright
2	5.6	Bright
3	5.6	Bright
4	5.6	Bright
5	5.7	Bright
6	5.7	Bright
7	5.7	Bright
8	5.8	Bright
9	5.8	Bright
10	5.8	Bright
11	5.9	Bright
12	5.9	Bright
13	6.0	Bright
14	6.0	Bright
15	6.0	Intense
16	6.1	Intense
17	6.2	Intense
18	6.2	Intense
19	6.3	Intense
20	6.3	Intense
21	6.4	Intense
22	6.4	Intense
23	6.5	Intense
24	6.5	Intense
25	6.6	Intense
26	6.6	Intense
27	6.6	Intense
28	6.7	Intense
29	6.7	Intense
30	6.7	Intense

Planning a trip in September

Is September a good time to visit Belém de São Francisco?

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

5.0

Sightseeing

4th-best month of the year

8.1

Beach & pool

3rd-best month of the year

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

What to pack for Belém de São Francisco in September

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

In September, Belém de São Francisco sees daytime highs around 32°C and nights near 21°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Belém de São Francisco 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 Belém de São Francisco peaks around March 10 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 10 (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	15	15	13	11	10	10	10	12	13	13	12
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Very high	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	14	Extreme
Feb	15	Extreme
Mar	15	Extreme
Apr	13	Extreme
May	11	Extreme
Jun	10	Very high
Jul	10	Very high
Aug	10	Very high
Sep	12	Extreme
Oct	13	Extreme
Nov	13	Extreme
Dec	12	Extreme

Location & terrain

Where is Belém de São Francisco?

Belém de São Francisco sits at 8.8°S, 39.0°W, 317 m above sea level, in Brazil. The nearest listed city is Abaré, 17 km away.

Topography around Belém de São Francisco

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Belém de São Francisco.

Within 3 km, the terrain around Belém de São Francisco has only modest variations in elevation — a maximum elevation change of 33 m around an average of 312 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 87 m; within 80 km, large variations in elevation — a maximum elevation change of 643 m.

The land around Belém de São Francisco is covered by shrubs (31%) and grassland (28%) within 3 km, shrubs (44%) and grassland (38%) within 16 km, and shrubs (82%) within 80 km.

3 km

33 m

shrubs 31%

16 km

87 m

shrubs 44%

80 km

643 m

shrubs 82%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland

← August Belém de São Francisco year-round climate October →Best places to visit in September

September weather nearby: Abaré 17 km · Cabrobó 46 km · Floresta 47 km · Salgueiro 77 km · Petrolândia 86 km · Santa Maria da Boa Vista 95 km · Tacaratu 98 km · Serrita 98 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 Belém de São Francisco (-8.7539°, -38.9658°, elevation 317 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	31	20
2	31	20
3	31	20
4	31	20
5	31	21
6	31	21
7	32	21
8	32	21
9	32	21
10	32	21
11	32	21
12	32	21
13	32	21
14	32	21
15	32	21
16	32	21
17	32	21
18	32	21
19	33	21
20	33	21
21	33	21
22	33	21
23	33	21
24	33	21
25	33	21
26	33	21
27	33	21
28	33	22
29	33	22
30	33	22

	Clearer (%)	Cloudier (%)
1	64	36
2	63	37
3	64	36
4	64	36
5	65	35
6	66	34
7	66	34
8	67	33
9	67	33
10	68	32
11	69	31
12	70	30
13	71	29
14	72	28
15	73	27
16	74	26
17	75	25
18	77	23
19	78	22
20	79	21
21	80	20
22	80	20
23	81	19
24	81	19
25	82	18
26	82	18
27	83	17
28	83	17
29	82	18
30	83	17

	Rain chance (%)
1	2
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	1
12	1
13	1
14	1
15	1
16	1
17	1
18	1
19	1
20	1
21	0
22	0
23	0
24	0
25	0
26	0
27	1
28	1
29	1
30	1

	Comfortable (%)	Humid (%)	Muggy (%)
1	6	79	15
2	6	79	15
3	6	79	15
4	6	79	15
5	7	78	15
6	7	78	15
7	8	76	16
8	8	76	16
9	8	76	16
10	8	75	17
11	9	74	17
12	9	74	17
13	9	74	17
14	9	74	17
15	9	74	17
16	9	74	17
17	9	74	17
18	9	75	16
19	9	75	16
20	9	75	16
21	8	76	16
22	8	76	16
23	8	76	16
24	8	76	16
25	8	76	16
26	8	75	17
27	8	75	17
28	8	75	17
29	8	75	17
30	9	73	18

	Avg high (°C)	Avg low (°C)
1	31	20
2	31	20
3	31	20
4	31	20
5	31	21
6	31	21
7	32	21
8	32	21
9	32	21
10	32	21
11	32	21
12	32	21
13	32	21
14	32	21
15	32	21
16	32	21
17	32	21
18	32	21
19	33	21
20	33	21
21	33	21
22	33	21
23	33	21
24	33	21
25	33	21
26	33	21
27	33	21
28	33	22
29	33	22
30	33	22

	Clearer (%)	Cloudier (%)
1	64	36
2	63	37
3	64	36
4	64	36
5	65	35
6	66	34
7	66	34
8	67	33
9	67	33
10	68	32
11	69	31
12	70	30
13	71	29
14	72	28
15	73	27
16	74	26
17	75	25
18	77	23
19	78	22
20	79	21
21	80	20
22	80	20
23	81	19
24	81	19
25	82	18
26	82	18
27	83	17
28	83	17
29	82	18
30	83	17

	Rain chance (%)
1	2
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	1
12	1
13	1
14	1
15	1
16	1
17	1
18	1
19	1
20	1
21	0
22	0
23	0
24	0
25	0
26	0
27	1
28	1
29	1
30	1

	Comfortable (%)	Humid (%)	Muggy (%)
1	6	79	15
2	6	79	15
3	6	79	15
4	6	79	15
5	7	78	15
6	7	78	15
7	8	76	16
8	8	76	16
9	8	76	16
10	8	75	17
11	9	74	17
12	9	74	17
13	9	74	17
14	9	74	17
15	9	74	17
16	9	74	17
17	9	74	17
18	9	75	16
19	9	75	16
20	9	75	16
21	8	76	16
22	8	76	16
23	8	76	16
24	8	76	16
25	8	76	16
26	8	75	17
27	8	75	17
28	8	75	17
29	8	75	17
30	9	73	18

	Avg high (°C)	Avg low (°C)
1	31	20
2	31	20
3	31	20
4	31	20
5	31	21
6	31	21
7	32	21
8	32	21
9	32	21
10	32	21
11	32	21
12	32	21
13	32	21
14	32	21
15	32	21
16	32	21
17	32	21
18	32	21
19	33	21
20	33	21
21	33	21
22	33	21
23	33	21
24	33	21
25	33	21
26	33	21
27	33	21
28	33	22
29	33	22
30	33	22

	Clearer (%)	Cloudier (%)
1	64	36
2	63	37
3	64	36
4	64	36
5	65	35
6	66	34
7	66	34
8	67	33
9	67	33
10	68	32
11	69	31
12	70	30
13	71	29
14	72	28
15	73	27
16	74	26
17	75	25
18	77	23
19	78	22
20	79	21
21	80	20
22	80	20
23	81	19
24	81	19
25	82	18
26	82	18
27	83	17
28	83	17
29	82	18
30	83	17

	Rain chance (%)
1	2
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	1
12	1
13	1
14	1
15	1
16	1
17	1
18	1
19	1
20	1
21	0
22	0
23	0
24	0
25	0
26	0
27	1
28	1
29	1
30	1

	Comfortable (%)	Humid (%)	Muggy (%)
1	6	79	15
2	6	79	15
3	6	79	15
4	6	79	15
5	7	78	15
6	7	78	15
7	8	76	16
8	8	76	16
9	8	76	16
10	8	75	17
11	9	74	17
12	9	74	17
13	9	74	17
14	9	74	17
15	9	74	17
16	9	74	17
17	9	74	17
18	9	75	16
19	9	75	16
20	9	75	16
21	8	76	16
22	8	76	16
23	8	76	16
24	8	76	16
25	8	76	16
26	8	75	17
27	8	75	17
28	8	75	17
29	8	75	17
30	9	73	18