Santa Maria da Boa Vista weather in September

In September, Santa Maria da Boa Vista sees average daytime highs of 33°C and overnight lows near 21°C, with 2 mm of rain across 0.4 wet days and about 11.9 hours of daylight. It is the 6th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 32°C in the first days to 34°C by the end. The sky is clear or mostly clear about 57% 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 Santa Maria da Boa Vista's 1st-clearest and 1st-windiest month. For the whole year in context, see Santa Maria da Boa Vista's year-round climate.

Daytime high
33°
6th warmest
Overnight low
21°
3rd coldest
Rainfall
2 mm
0.4 wet days
Daylight
12 hours
5:35 AM – 5:32 PM
Cloud cover
39%
1st clearest
Wind
19 km/h
1st windiest
Solar energy
6.09 kWh/m²
Travel score
4.4
out of 10

Santa Maria da Boa Vista is settlement in Brazil.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 32°C in the first days to 34°C by the end.

A typical September day in Santa Maria da Boa Vista reaches about 33°C in the afternoon and slips back to 21°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 35°C. Set against its neighbours, September runs about 2°C warmer than August and about 2°C cooler than October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13220
23220
33220
43220
53220
63220
73220
83320
93321
103321
113321
123321
133321
143321
153321
163321
173321
183321
193321
203321
213421
223421
233421
243421
253421
263421
273421
283421
293421
303422

How September really feels in Santa Maria da Boa Vista

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
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Santa Maria da Boa Vista weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan34° / 24°769.212.53.2
Feb33° / 23°7510.112.33.2
Mar33° / 23°9211.612.13.3
Apr33° / 23°518.111.83.8
May32° / 22°214.711.64.6
Jun30° / 21°82.111.55.6
Jul30° / 20°51.211.55.9
Aug31° / 20°30.611.75.4
Sep33° / 21°20.411.94.4
Oct35° / 22°6112.23.4
Nov35° / 23°193.112.43.0
Dec35° / 24°414.712.53.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 57% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 28%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16238
26337
36337
46337
56337
66337
76436
86436
96535
106634
116733
126733
136931
146931
157129
167228
177327
187525
197624
207723
217921
227921
238020
248020
258119
268119
278020
288119
298119
308119

Chance of precipitation in September

Any precipitation

Santa Maria da Boa Vista gets around 2 mm of rain over 0.4 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.

0%10%20%30%151015202530
Rain chance (%)
11
21
31
41
51
62
72
82
92
102
112
122
132
141
151
161
171
181
191
201
211
221
231
241
251
261
271
281
291
301

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. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1028693
2028693
3028693
4028693
5028693
6028693
7028693
8128674
9128674
10128674
11128674
12128674
13127684
14127684
15127684
16126694
17126694
18126694
19126694
20126694
21126694
22126694
23126694
24126685
25126685
26127675
27127675
28027685
29028675
30028666

Wind in September

Winds average 19 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.

0510152025151015202530
Wind speed (km/h)Feels
120light breeze
220light breeze
320light breeze
420light breeze
520light breeze
620light breeze
720light breeze
820light breeze
920light breeze
1020light breeze
1120light breeze
1220light breeze
1320light breeze
1420light breeze
1520light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2819light breeze
2919light breeze
3019light 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 5:44 AM to 5:27 AM, and sunset from 5:34 PM to 5:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.85:445:34
211.85:445:34
311.85:435:34
411.95:425:34
511.95:425:33
611.95:415:33
711.95:415:33
811.95:405:33
911.95:395:33
1011.95:395:33
1111.95:385:33
1211.95:385:33
1311.95:375:33
1411.95:365:32
1511.95:365:32
1612.05:355:32
1712.05:345:32
1812.05:345:32
1912.05:335:32
2012.05:335:32
2112.05:325:32
2212.05:315:31
2312.05:315:31
2412.05:305:31
2512.05:305:31
2612.05:295:31
2712.05:285:31
2812.15:285:31
2912.15:275:31
3012.15:275:31

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.09 kWh/m².

For context, solar energy here swings from a low near 3.9 kWh/m² to a high of 6.73 kWh/m² in October across the year — September's 6.09 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.6Bright
35.6Bright
45.6Bright
55.7Bright
65.7Bright
75.7Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.9Bright
135.9Bright
146.0Bright
156.0Intense
166.1Intense
176.1Intense
186.2Intense
196.2Intense
206.3Intense
216.3Intense
226.4Intense
236.4Intense
246.5Intense
256.5Intense
266.5Intense
276.6Intense
286.6Intense
296.6Intense
306.6Intense
Planning a trip in September

Is September a good time to visit Santa Maria da Boa Vista?

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

4.4
Sightseeing
5th-best month of the year
7.8
Beach & pool
3rd-best month of the year

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

What to pack for Santa Maria da Boa Vista in September

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

In September, Santa Maria da Boa Vista sees daytime highs around 33°C and nights near 21°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Santa Maria da Boa Vista 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 Santa Maria da Boa Vista peaks around March 10 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 at about 9 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 10UV 15Jul 13UV 9
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May10Extreme
Jun10Very high
Jul9Very high
Aug10Very high
Sep12Extreme
Oct13Extreme
Nov13Extreme
Dec12Extreme
Location & terrain

Where is Santa Maria da Boa Vista?

Santa Maria da Boa Vista sits at 8.8°S, 39.8°W, 351 m above sea level, in Brazil. The nearest listed city is Curaçá, 22 km away.

Topography around Santa Maria da Boa Vista

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santa Maria da Boa Vista.

Within 3 km, the terrain around Santa Maria da Boa Vista has only modest variations in elevation — a maximum elevation change of 142 m around an average of 361 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 270 m; within 80 km, significant variations in elevation — a maximum elevation change of 521 m.

The land around Santa Maria da Boa Vista is covered by shrubs (47%) within 3 km, shrubs (81%) within 16 km, and shrubs (86%) within 80 km.

3 km
142 m
16 km
270 m
80 km
521 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Curaçá 22 km · Lagoa Grande 53 km · Cabrobó 65 km · Abaré 79 km · Parnamirim 84 km · Belém de São Francisco 95 km · Petrolina 99 km · Juazeiro 100 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
Roman Catholic 57%Evangelical 27%none 9%other 4%

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 Santa Maria da Boa Vista (-8.8078°, -39.8256°, elevation 351 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).