Vitória do Mearim weather in September

In September, Vitória do Mearim sees average daytime highs of 35°C and overnight lows near 25°C, with 7 mm of rain across 1.3 wet days and about 12 hours of daylight. It is the 2nd-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 66% of the time in September, and the air most often feels oppressive.

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 Vitória do Mearim's 2nd-clearest and 2nd-windiest month. For the whole year in context, see Vitória do Mearim's year-round climate.

Daytime high
35°
2nd warmest
Overnight low
25°
9th coldest
Rainfall
7 mm
1.3 wet days
Daylight
12 hours
5:54 AM – 5:53 PM
Cloud cover
37%
2nd clearest
Wind
11 km/h
2nd windiest
Solar energy
6.21 kWh/m²
Travel score
3.2
out of 10

Vitória do Mearim 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

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

A typical September day in Vitória do Mearim reaches about 35°C in the afternoon and slips back to 25°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 33°C and 37°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)
13525
23525
33525
43525
53525
63525
73525
83525
93525
103525
113525
123525
133525
143525
153525
163525
173525
183525
193525
203525
213525
223525
233525
243525
253525
263525
273525
283525
293525
303525

How September really feels in Vitória do Mearim

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
29 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.

Vitória do Mearim weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 24°24824.212.22.6
Feb32° / 24°28324.712.12.5
Mar31° / 24°36029.1122.4
Apr31° / 24°35427.611.92.4
May32° / 24°19221.911.83.0
Jun32° / 24°6312.111.84.1
Jul32° / 24°386.711.84.4
Aug34° / 24°102.411.93.9
Sep35° / 25°71.3123.2
Oct35° / 25°183.612.12.8
Nov35° / 25°436.912.22.8
Dec34° / 25°9914.212.22.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 66% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 23% of September, with mostly cloudy or overcast conditions the remaining 11%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1928
2928
3928
4928
5928
6928
7919
8919
9919
10919
119010
129010
139010
148911
158911
168911
178812
188812
198713
208713
218713
228713
238713
248713
258713
268713
278713
288713
298713
308713

Chance of precipitation in September

Any precipitation

Vitória do Mearim gets around 7 mm of rain over 1.3 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 5% and peaks near 7% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
15
25
34
44
54
64
73
83
93
103
114
124
134
144
155
165
175
185
195
206
216
226
236
246
256
266
276
286
296
307

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 83% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
114842
215832
316831
417821
517821
618811
719801
819801
920800
1020800
1121790
1221790
1320800
1420800
1520800
1619810
1718820
1818820
1917830
2017830
2116840
2215850
2314860
2414860
2513870
2613870
2712880
2812880
2912880
3012880

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm

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 6:01 AM to 5:48 AM, and sunset from 5:57 PM to 5:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:015:57
211.96:015:57
311.96:005:57
411.96:005:56
511.95:595:56
611.95:595:56
712.05:595:56
812.05:585:55
912.05:585:55
1012.05:575:55
1112.05:575:55
1212.05:565:54
1312.05:565:54
1412.05:555:54
1512.05:555:54
1612.05:545:53
1712.05:545:53
1812.05:535:53
1912.05:535:52
2012.05:525:52
2112.05:525:52
2212.05:525:52
2312.05:515:51
2412.05:515:51
2512.05:505:51
2612.05:505:51
2712.05:495:50
2812.05:495:50
2912.05:485:50
3012.05:485:50

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.21 kWh/m².

For context, solar energy here swings from a low near 4.3 kWh/m² to a high of 6.28 kWh/m² in October across the year — September's 6.21 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.1Intense
46.1Intense
56.1Intense
66.1Intense
76.1Intense
86.1Intense
96.2Intense
106.2Intense
116.2Intense
126.2Intense
136.2Intense
146.2Intense
156.2Intense
166.2Intense
176.2Intense
186.2Intense
196.2Intense
206.3Intense
216.3Intense
226.3Intense
236.3Intense
246.3Intense
256.3Intense
266.3Intense
276.3Intense
286.3Intense
296.3Intense
306.3Intense
Planning a trip in September

Hazard calendar for Vitória do Mearim

In seasonPeak

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

Vitória do Mearim's monsoon runs January–May, 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 Vitória do Mearim?

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

3.2
Sightseeing
4th-best month of the year
6.8
Beach & pool
3rd-best month of the year

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

What to pack for Vitória do Mearim in September

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

In September, Vitória do Mearim sees daytime highs around 35°C and nights near 25°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Vitória do Mearim 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 Vitória do Mearim peaks around March 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 14 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 17UV 15Jul 14UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Extreme
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Vitória do Mearim 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 Vitória do Mearim is worst in November — around 22 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (July, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateNov 1621 µg/m³Jul 148 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb16Moderate
Mar15Moderate
Apr14Moderate
May10Good
Jun9Good
Jul8Good
Aug9Good
Sep11Good
Oct17Moderate
Nov22Moderate
Dec17Moderate
Location & terrain

Where is Vitória do Mearim?

Vitória do Mearim sits at 3.5°S, 44.9°W, 15 m above sea level, in Brazil. The nearest listed city is Arari, 10 km away.

Topography around Vitória do Mearim

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Vitória do Mearim.

Within 3 km, the terrain around Vitória do Mearim has only modest variations in elevation — a maximum elevation change of 30 m around an average of 8 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 48 m; within 80 km, only modest variations in elevation — a maximum elevation change of 109 m.

The land around Vitória do Mearim is covered by grassland (60%) within 3 km, grassland (53%) and trees (27%) within 16 km, and grassland (47%) and trees (36%) within 80 km.

3 km
30 m
16 km
48 m
80 km
109 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetlandmangroves
September weather nearby: Arari 10 km · Cajari 22 km · Viana 31 km · Miranda do Norte 34 km · Anajatuba 35 km · Penalva 38 km · Matões do Norte 40 km · Monção 42 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 Vitória do Mearim (-3.4622°, -44.8706°, elevation 15 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).