Demerval Lobão weather in September

In September, Demerval Lobão sees average daytime highs of 37°C and overnight lows near 24°C, with 3 mm of rain across 0.7 wet days and about 12 hours of daylight. It is the 2nd-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 37°C through the month. The sky is clear or mostly clear about 73% 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 Demerval Lobão's 2nd-clearest and 3rd-windiest month. For the whole year in context, see Demerval Lobão's year-round climate.

Daytime high
37°
2nd warmest
Overnight low
24°
10th coldest
Rainfall
3 mm
0.7 wet days
Daylight
12 hours
5:46 AM – 5:44 PM
Cloud cover
32%
2nd clearest
Wind
8 km/h
3rd windiest
Solar energy
6.6 kWh/m²
Travel score
2.1
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 37°C through the month.

A typical September day in Demerval Lobão reaches about 37°C in the afternoon and slips back to 24°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 35°C and 38°C. Set against its neighbours, September runs about 2°C warmer than August and on par with October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13624
23624
33624
43624
53624
63624
73624
83724
93724
103724
113724
123724
133724
143724
153724
163724
173724
183724
193724
203724
213724
223724
233724
243724
253724
263724
273724
283724
293724
303724

How September really feels in Demerval Lobão

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
5 feel dangerously hot (≥ 39°C)
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.

Demerval Lobão weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°22222.612.32.7
Feb32° / 23°26322.212.22.8
Mar31° / 23°30226.3122.7
Apr31° / 23°22222.311.93.0
May32° / 23°9510.911.83.8
Jun33° / 23°112.211.74.0
Jul34° / 23°6111.73.8
Aug35° / 24°20.411.83.0
Sep37° / 24°30.7122.1
Oct37° / 25°172.312.11.7
Nov36° / 25°426.212.22.1
Dec34° / 24°9411.512.32.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 73% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 10%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1919
29010
39010
49010
59010
69010
79010
89010
99010
109010
119010
129010
139010
149010
159010
169010
17919
189010
199010
209010
219010
229010
239010
249010
259010
268911
278911
288911
298812
308812

Chance of precipitation in September

Any precipitation

Demerval Lobão gets around 3 mm of rain over 0.7 wet days in September. 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.

0%10%20%30%151015202530
Rain chance (%)
12
22
32
42
52
62
72
82
92
102
112
122
132
142
152
162
172
182
192
203
213
223
233
243
254
264
274
284
294
304

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 48% of days. Sticky, muggy-or-worse air turns up on roughly 40% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
111452303
211452303
311551303
411552293
511552293
611652283
711652283
811653282
901654282
1001653292
1101653292
1201652302
1301552312
1401551322
1501550332
1601450342
1701349352
1801348373
1901247383
2001146403
2101045413
220945434
230844444
240843454
250742465
260642475
270641485
280641486
290540486
300539496

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

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 5:54 AM to 5:39 AM, and sunset from 5:47 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:545:47
211.95:535:47
311.95:535:47
411.95:525:47
511.95:525:47
611.95:515:46
711.95:515:46
811.95:505:46
911.95:505:46
1011.95:495:45
1111.95:495:45
1212.05:485:45
1312.05:475:45
1412.05:475:45
1512.05:465:44
1612.05:465:44
1712.05:455:44
1812.05:455:44
1912.05:445:43
2012.05:445:43
2112.05:435:43
2212.05:435:43
2312.05:425:43
2412.05:425:42
2512.05:415:42
2612.05:415:42
2712.05:405:42
2812.05:405:42
2912.05:395:41
3012.05:395:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.6 kWh/m².

For context, solar energy here swings from a low near 4.77 kWh/m² to a high of 6.62 kWh/m² in October across the year — September's 6.6 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.4Intense
26.4Intense
36.4Intense
46.5Intense
56.5Intense
66.5Intense
76.5Intense
86.5Intense
96.5Intense
106.5Intense
116.6Intense
126.6Intense
136.6Intense
146.6Intense
156.6Intense
166.6Intense
176.6Intense
186.6Intense
196.6Intense
206.7Intense
216.7Intense
226.7Intense
236.7Intense
246.7Intense
256.7Intense
266.7Intense
276.7Intense
286.7Intense
296.7Intense
306.7Intense
Planning a trip in September

Hazard calendar for Demerval Lobão

In seasonPeak

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

Demerval Lobão'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 Demerval Lobão?

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

2.1
Sightseeing
10th-best month of the year
5.6
Beach & pool
5th-best month of the year

September is a weaker month for outdoor sightseeing in Demerval Lobão.

What to pack for Demerval Lobão in September

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

In September, Demerval Lobão sees daytime highs around 37°C and nights near 24°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Demerval Lobão 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 Demerval Lobão peaks around March 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 10 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 13UV 15Aug 10UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Demerval Lobão 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 Demerval Lobão is worst in October — around 35 µg/m³ PM2.5 (moderate), about 4.2× the cleanest month (June, 8 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateOct 1633 µg/m³Jun 199 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb16Moderate
Mar15Moderate
Apr14Moderate
May12Good
Jun8Good
Jul10Good
Aug16Moderate
Sep25Moderate
Oct35Moderate
Nov23Moderate
Dec17Moderate
Location & terrain

Where is Demerval Lobão?

Demerval Lobão sits at 5.4°S, 42.7°W, 116 m above sea level, in Brazil. The nearest listed city is Teresina, 33 km away.

Topography around Demerval Lobão

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

Within 3 km, the terrain around Demerval Lobão has only modest variations in elevation — a maximum elevation change of 93 m around an average of 120 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 194 m; within 80 km, significant variations in elevation — a maximum elevation change of 378 m.

The land around Demerval Lobão is covered by trees (57%) and shrubs (20%) within 3 km, trees (63%) and shrubs (22%) within 16 km, and trees (55%) and shrubs (25%) within 80 km.

3 km
93 m
16 km
194 m
80 km
378 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Teresina 33 km · Timon 34 km · Altos 43 km · Parnarama 58 km · Água Branca 60 km · Matões 61 km · José de Freitas 68 km · Campo Maior 82 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 Demerval Lobão (-5.3583°, -42.6764°, elevation 116 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).