São Miguel do Tapuio weather in September

In September, São Miguel do Tapuio sees average daytime highs of 35°C and overnight lows near 23°C, with 1 mm of rain across 0.4 wet days and about 12 hours of daylight. It is the 3rd-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 78% of the time in September, and the air most often feels comfortable.

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 São Miguel do Tapuio's 1st-clearest and 1st-windiest month. For the whole year in context, see São Miguel do Tapuio's year-round climate.

Daytime high
35°
3rd warmest
Overnight low
23°
8th coldest
Rainfall
1 mm
0.4 wet days
Daylight
12 hours
5:41 AM – 5:39 PM
Cloud cover
27%
1st clearest
Wind
17 km/h
1st windiest
Solar energy
6.91 kWh/m²
Travel score
3.6
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 35°C through the month.

A typical September day in São Miguel do Tapuio reaches about 35°C in the afternoon and slips back to 23°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 33°C and 36°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13422
23422
33422
43422
53422
63422
73422
83422
93423
103423
113423
123423
133423
143423
153423
163523
173523
183523
193523
203523
213523
223523
233523
243523
253523
263523
273523
283523
293523
303523

How September really feels in São Miguel do Tapuio

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.

São Miguel do Tapuio weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°15917.212.33.3
Feb31° / 22°19216.712.23.5
Mar30° / 22°26922.1123.4
Apr30° / 22°18218.511.93.8
May31° / 22°688.711.84.6
Jun31° / 22°122.111.75.2
Jul32° / 22°7111.75.1
Aug33° / 22°20.211.84.4
Sep35° / 23°10.4123.6
Oct35° / 23°120.912.13.1
Nov35° / 24°132.612.33.0
Dec34° / 24°406.312.33.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 78% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 7%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1937
2937
3937
4937
5937
6937
7937
8937
9928
10928
11937
12937
13937
14937
15937
16937
17937
18937
19946
20946
21937
22937
23937
24937
25928
26928
27928
28928
29919
309010

Chance of precipitation in September

Any precipitation

São Miguel do Tapuio gets around 1 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
61
71
81
91
101
111
121
131
141
151
161
171
181
192
202
212
222
232
242
251
261
271
281
291
301

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 59% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1664282
2763282
3763282
4763282
5763282
6763282
7763282
8763282
9763282
10762292
11663292
12662302
13661312
14562312
15561322
16560332
17460342
18459352
19458362
20457372
21456382
22455392
23454402
24454402
25453412
26453412
27452422
28452422
29353422
30353422

Wind in September

Winds average 17 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 17 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
117light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light 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 5:48 AM to 5:33 AM, and sunset from 5:42 PM to 5:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:485:42
211.95:485:42
311.95:475:41
411.95:475:41
511.95:465:41
611.95:465:41
711.95:455:41
811.95:455:40
911.95:445:40
1011.95:445:40
1111.95:435:40
1211.95:435:40
1312.05:425:39
1412.05:425:39
1512.05:415:39
1612.05:415:39
1712.05:405:39
1812.05:395:38
1912.05:395:38
2012.05:385:38
2112.05:385:38
2212.05:375:37
2312.05:375:37
2412.05:365:37
2512.05:365:37
2612.05:355:37
2712.05:355:36
2812.05:345:36
2912.05:345:36
3012.05:335:36

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.91 kWh/m².

For context, solar energy here swings from a low near 5.01 kWh/m² to a high of 6.96 kWh/m² in October across the year — September's 6.91 kWh/m² sits near the top of that range.

02468151015202530
Solar energy (kWh/m²)Level
16.7Intense
26.7Intense
36.7Intense
46.7Intense
56.8Intense
66.8Intense
76.8Intense
86.8Intense
96.8Intense
106.8Intense
116.9Intense
126.9Intense
136.9Intense
146.9Intense
156.9Intense
166.9Intense
176.9Intense
187.0Intense
197.0Intense
207.0Intense
217.0Intense
227.0Intense
237.0Intense
247.0Intense
257.0Intense
267.0Intense
277.0Intense
287.0Intense
297.0Intense
307.0Intense
Planning a trip in September

Hazard calendar for São Miguel do Tapuio

In seasonPeak

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

São Miguel do Tapuio's monsoon runs January–April, when most of the year's rain falls.

Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit São Miguel do Tapuio?

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

3.6
Sightseeing
6th-best month of the year
7.5
Beach & pool
4th-best month of the year

September is a weaker month for outdoor sightseeing in São Miguel do Tapuio. The water and warmth also suit a beach or pool day.

What to pack for São Miguel do Tapuio in September

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

In September, São Miguel do Tapuio sees daytime highs around 35°C and nights near 23°C. Pack light clothes and sun protection.

light clothessun protection

UV index in São Miguel do Tapuio 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 Miguel do Tapuio peaks around March 13 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 13UV 16Jun 23UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar16Extreme
Apr14Extreme
May11Extreme
Jun10Extreme
Jul10Extreme
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec12Extreme
Location & terrain

Where is São Miguel do Tapuio?

São Miguel do Tapuio sits at 5.5°S, 41.3°W, 283 m above sea level, in Brazil. The nearest listed city is Castelo do Piauí, 32 km away.

Topography around São Miguel do Tapuio

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São Miguel do Tapuio.

Within 3 km, the terrain around São Miguel do Tapuio has only modest variations in elevation — a maximum elevation change of 142 m around an average of 296 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 339 m; within 80 km, large variations in elevation — a maximum elevation change of 787 m.

The land around São Miguel do Tapuio is covered by shrubs (53%) and grassland (30%) within 3 km, shrubs (63%) and trees (29%) within 16 km, and shrubs (68%) and trees (24%) within 80 km.

3 km
142 m
16 km
339 m
80 km
787 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Castelo do Piauí 32 km · Novo Oriente 61 km · Quiterianópolis 79 km · Crateús 81 km · Parambu 105 km · Valença do Piauí 111 km · Independência 113 km · Campo Maior 120 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 São Miguel do Tapuio (-5.5036°, -41.3233°, elevation 283 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).