Boa Viagem weather in September

In September, Boa Viagem sees average daytime highs of 33°C and overnight lows near 22°C, with 3 mm of rain across 0.9 wet days and about 12 hours of daylight. It is the 4th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 75% of the time in September, and the air most often feels humid.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Boa Viagem's 1st-clearest and 3rd-windiest month. For the whole year in context, see Boa Viagem's year-round climate.

Daytime high: 33°; 4th warmest
Overnight low: 22°; 5th coldest
Rainfall: 3 mm; 0.9 wet days
Daylight: 12 hours; 5:34 AM – 5:32 PM
Cloud cover: 26%; 1st clearest
Wind: 16 km/h; 3rd windiest
Solar energy: 6.81 kWh/m²
Travel score: 4.5; out of 10

← August Boa Viagem 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 33°C through the month.

A typical September day in Boa Viagem reaches about 33°C in the afternoon and slips back to 22°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 34°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)	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	34	34	34	34	34
Avg low (°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	22	22	22	22	22	22

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

How September really feels in Boa Viagem

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.

Boa Viagem weather by month

How September compares with the rest of the year at a glance. September is the 4th-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	32° / 23°	89	13.8	12.3	3.5
Feb	32° / 22°	82	15.6	12.2	3.5
Mar	31° / 22°	120	19.5	12	3.5
Apr	30° / 22°	109	20	11.9	3.7
May	30° / 22°	69	13.2	11.8	4.6
Jun	30° / 21°	31	8.2	11.7	5.3
Jul	31° / 21°	18	4.4	11.7	5.5
Aug	32° / 21°	8	2	11.8	5.1
Sep	33° / 22°	3	0.9	12	4.5
Oct	34° / 22°	9	0.8	12.1	4.0
Nov	34° / 23°	5	1.2	12.2	3.8
Dec	33° / 23°	20	4.6	12.3	3.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 75% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 8%. 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 (%)	90	90	90	90	90	90	90	90	90	90	90	90	90	92	92	92	93	93	93	93	94	94	94	94	94	93	92	92	92	91
Cloudier (%)	10	10	10	10	10	10	10	10	10	10	10	10	10	8	8	8	7	7	7	7	6	6	6	6	6	7	8	8	8	9

	Clearer (%)	Cloudier (%)
1	90	10
2	90	10
3	90	10
4	90	10
5	90	10
6	90	10
7	90	10
8	90	10
9	90	10
10	90	10
11	90	10
12	90	10
13	90	10
14	92	8
15	92	8
16	92	8
17	93	7
18	93	7
19	93	7
20	93	7
21	94	6
22	94	6
23	94	6
24	94	6
25	94	6
26	93	7
27	92	8
28	92	8
29	92	8
30	91	9

Chance of precipitation in September

Any precipitation

Boa Viagem gets around 3 mm of rain over 0.9 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 3% and peaks near 4% 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 (%)	3	3	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	3	3	3	3	2	2	2	2	2	2	1	1	1

	Rain chance (%)
1	3
2	3
3	4
4	4
5	4
6	4
7	4
8	4
9	4
10	4
11	4
12	4
13	4
14	4
15	4
16	4
17	4
18	3
19	3
20	3
21	3
22	2
23	2
24	2
25	2
26	2
27	2
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 68% of days. Sticky, muggy-or-worse air turns up on roughly 17% 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 (%)	20	20	20	20	21	21	20	20	20	19	18	17	17	16	15	14	13	13	12	12	11	11	11	11	11	10	10	10	10	9
Humid (%)	65	65	65	65	64	64	65	65	65	66	67	68	68	69	70	71	71	71	71	71	71	71	70	70	70	70	70	70	70	71
Muggy (%)	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	16	16	17	17	18	18	19	19	19	20	20	20	20	20

	Comfortable (%)	Humid (%)	Muggy (%)
1	20	65	15
2	20	65	15
3	20	65	15
4	20	65	15
5	21	64	15
6	21	64	15
7	20	65	15
8	20	65	15
9	20	65	15
10	19	66	15
11	18	67	15
12	17	68	15
13	17	68	15
14	16	69	15
15	15	70	15
16	14	71	15
17	13	71	16
18	13	71	16
19	12	71	17
20	12	71	17
21	11	71	18
22	11	71	18
23	11	70	19
24	11	70	19
25	11	70	19
26	10	70	20
27	10	70	20
28	10	70	20
29	10	70	20
30	9	71	20

Wind in September

Winds average 16 km/h in September.

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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min 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 6 minutes over September. Sunrise moves from 5:42 AM to 5:27 AM, and sunset from 5:36 PM to 5:29 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)	11.9	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	12.0	12.0	12.0	12.0	12.0	12.0	12.0
Sunrise (AM)	5:42	5:41	5:41	5:40	5:40	5:39	5:39	5:38	5:38	5:37	5:37	5:36	5:36	5:35	5:35	5:34	5:34	5:33	5:33	5:32	5:32	5:31	5:30	5:30	5:29	5:29	5:28	5:28	5:28	5:27
Sunset (PM)	5:36	5:35	5:35	5:35	5:35	5:35	5:34	5:34	5:34	5:34	5:34	5:33	5:33	5:33	5:33	5:32	5:32	5:32	5:32	5:32	5:31	5:31	5:31	5:31	5:30	5:30	5:30	5:30	5:30	5:29

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.9	5:42	5:36
2	11.9	5:41	5:35
3	11.9	5:41	5:35
4	11.9	5:40	5:35
5	11.9	5:40	5:35
6	11.9	5:39	5:35
7	11.9	5:39	5:34
8	11.9	5:38	5:34
9	11.9	5:38	5:34
10	11.9	5:37	5:34
11	11.9	5:37	5:34
12	12.0	5:36	5:33
13	12.0	5:36	5:33
14	12.0	5:35	5:33
15	12.0	5:35	5:33
16	12.0	5:34	5:32
17	12.0	5:34	5:32
18	12.0	5:33	5:32
19	12.0	5:33	5:32
20	12.0	5:32	5:32
21	12.0	5:32	5:31
22	12.0	5:31	5:31
23	12.0	5:30	5:31
24	12.0	5:30	5:31
25	12.0	5:29	5:30
26	12.0	5:29	5:30
27	12.0	5:28	5:30
28	12.0	5:28	5:30
29	12.0	5:28	5:30
30	12.0	5:27	5:29

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.81 kWh/m².

For context, solar energy here swings from a low near 4.8 kWh/m² to a high of 6.99 kWh/m² in October across the year — September's 6.81 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)	6.5	6.5	6.5	6.5	6.6	6.6	6.6	6.6	6.7	6.7	6.7	6.7	6.7	6.8	6.8	6.8	6.8	6.9	6.9	6.9	6.9	6.9	7.0	7.0	7.0	7.0	7.0	7.0	7.0	7.0
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	6.5	Intense
2	6.5	Intense
3	6.5	Intense
4	6.5	Intense
5	6.6	Intense
6	6.6	Intense
7	6.6	Intense
8	6.6	Intense
9	6.7	Intense
10	6.7	Intense
11	6.7	Intense
12	6.7	Intense
13	6.7	Intense
14	6.8	Intense
15	6.8	Intense
16	6.8	Intense
17	6.8	Intense
18	6.9	Intense
19	6.9	Intense
20	6.9	Intense
21	6.9	Intense
22	6.9	Intense
23	7.0	Intense
24	7.0	Intense
25	7.0	Intense
26	7.0	Intense
27	7.0	Intense
28	7.0	Intense
29	7.0	Intense
30	7.0	Intense

Planning a trip in September

Hazard calendar for Boa Viagem

In seasonPeak

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

Boa Viagem's rainy season runs January–May, 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 Boa Viagem?

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

4.5

Sightseeing

5th-best month of the year

8.0

Beach & pool

2nd-best month of the year

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

What to pack for Boa Viagem in September

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

In September, Boa Viagem sees daytime highs around 33°C and nights near 22°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Boa Viagem 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 Boa Viagem peaks around March 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 10 (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)	13	15	16	14	11	10	10	10	12	12	12	12
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	13	Extreme
Feb	15	Extreme
Mar	16	Extreme
Apr	14	Extreme
May	11	Extreme
Jun	10	Very high
Jul	10	Extreme
Aug	10	Extreme
Sep	12	Extreme
Oct	12	Extreme
Nov	12	Extreme
Dec	12	Extreme

Location & terrain

Where is Boa Viagem?

Boa Viagem sits at 5.1°S, 39.7°W, 288 m above sea level, in Brazil. The nearest listed city is Madalena, 35 km away.

Topography around Boa Viagem

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

Within 3 km, the terrain around Boa Viagem has only modest variations in elevation — a maximum elevation change of 64 m around an average of 292 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 437 m; within 80 km, large variations in elevation — a maximum elevation change of 982 m.

The land around Boa Viagem is covered by grassland (50%) and shrubs (37%) within 3 km, shrubs (74%) and grassland (24%) within 16 km, and shrubs (75%) and grassland (21%) within 80 km.

3 km

64 m

grassland 50%

16 km

437 m

shrubs 74%

80 km

982 m

shrubs 75%

treesshrubsgrasslandcroplandartificial surfaces

← August Boa Viagem year-round climate October →Best places to visit in September

September weather nearby: Madalena 35 km · Pedra Branca 36 km · Quixeramobim 49 km · Monsenhor Tabosa 53 km · Senador Pompeu 65 km · Itatira 68 km · Mombaça 69 km · Independência 70 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 Boa Viagem (-5.1275°, -39.7322°, elevation 288 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	22
2	33	22
3	33	22
4	33	22
5	33	22
6	33	22
7	33	22
8	33	22
9	33	22
10	33	22
11	33	22
12	33	22
13	33	22
14	33	22
15	33	22
16	33	22
17	33	22
18	33	22
19	33	22
20	33	22
21	33	22
22	33	22
23	33	22
24	33	22
25	33	22
26	34	22
27	34	22
28	34	22
29	34	22
30	34	22

	Clearer (%)	Cloudier (%)
1	90	10
2	90	10
3	90	10
4	90	10
5	90	10
6	90	10
7	90	10
8	90	10
9	90	10
10	90	10
11	90	10
12	90	10
13	90	10
14	92	8
15	92	8
16	92	8
17	93	7
18	93	7
19	93	7
20	93	7
21	94	6
22	94	6
23	94	6
24	94	6
25	94	6
26	93	7
27	92	8
28	92	8
29	92	8
30	91	9

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

	Comfortable (%)	Humid (%)	Muggy (%)
1	20	65	15
2	20	65	15
3	20	65	15
4	20	65	15
5	21	64	15
6	21	64	15
7	20	65	15
8	20	65	15
9	20	65	15
10	19	66	15
11	18	67	15
12	17	68	15
13	17	68	15
14	16	69	15
15	15	70	15
16	14	71	15
17	13	71	16
18	13	71	16
19	12	71	17
20	12	71	17
21	11	71	18
22	11	71	18
23	11	70	19
24	11	70	19
25	11	70	19
26	10	70	20
27	10	70	20
28	10	70	20
29	10	70	20
30	9	71	20

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

	Clearer (%)	Cloudier (%)
1	90	10
2	90	10
3	90	10
4	90	10
5	90	10
6	90	10
7	90	10
8	90	10
9	90	10
10	90	10
11	90	10
12	90	10
13	90	10
14	92	8
15	92	8
16	92	8
17	93	7
18	93	7
19	93	7
20	93	7
21	94	6
22	94	6
23	94	6
24	94	6
25	94	6
26	93	7
27	92	8
28	92	8
29	92	8
30	91	9

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

	Comfortable (%)	Humid (%)	Muggy (%)
1	20	65	15
2	20	65	15
3	20	65	15
4	20	65	15
5	21	64	15
6	21	64	15
7	20	65	15
8	20	65	15
9	20	65	15
10	19	66	15
11	18	67	15
12	17	68	15
13	17	68	15
14	16	69	15
15	15	70	15
16	14	71	15
17	13	71	16
18	13	71	16
19	12	71	17
20	12	71	17
21	11	71	18
22	11	71	18
23	11	70	19
24	11	70	19
25	11	70	19
26	10	70	20
27	10	70	20
28	10	70	20
29	10	70	20
30	9	71	20

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

	Clearer (%)	Cloudier (%)
1	90	10
2	90	10
3	90	10
4	90	10
5	90	10
6	90	10
7	90	10
8	90	10
9	90	10
10	90	10
11	90	10
12	90	10
13	90	10
14	92	8
15	92	8
16	92	8
17	93	7
18	93	7
19	93	7
20	93	7
21	94	6
22	94	6
23	94	6
24	94	6
25	94	6
26	93	7
27	92	8
28	92	8
29	92	8
30	91	9

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

	Comfortable (%)	Humid (%)	Muggy (%)
1	20	65	15
2	20	65	15
3	20	65	15
4	20	65	15
5	21	64	15
6	21	64	15
7	20	65	15
8	20	65	15
9	20	65	15
10	19	66	15
11	18	67	15
12	17	68	15
13	17	68	15
14	16	69	15
15	15	70	15
16	14	71	15
17	13	71	16
18	13	71	16
19	12	71	17
20	12	71	17
21	11	71	18
22	11	71	18
23	11	70	19
24	11	70	19
25	11	70	19
26	10	70	20
27	10	70	20
28	10	70	20
29	10	70	20
30	9	71	20