Itapecuru Mirim weather in September

In September, Itapecuru Mirim sees average daytime highs of 35°C and overnight lows near 25°C, with 5 mm of rain across 0.9 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 70% 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 Itapecuru Mirim's 2nd-clearest and 2nd-windiest month. For the whole year in context, see Itapecuru Mirim's year-round climate.

Daytime high
35°
2nd warmest
Overnight low
25°
9th coldest
Rainfall
5 mm
0.9 wet days
Daylight
12 hours
5:52 AM – 5:51 PM
Cloud cover
36%
2nd clearest
Wind
11 km/h
2nd windiest
Solar energy
6.24 kWh/m²
Travel score
3.1
out of 10

Itapecuru Mirim is human 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 Itapecuru Mirim reaches about 35°C in the afternoon and slips back to 25°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 34°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)
13524
23524
33524
43524
53524
63524
73524
83524
93524
103524
113524
123524
133524
143524
153525
163525
173525
183525
193525
203525
213525
223525
233525
243525
253525
263525
273525
283625
293625
303625

How September really feels in Itapecuru Mirim

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
12 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.

Itapecuru Mirim 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°23323.212.22.6
Feb32° / 24°26624.212.12.5
Mar31° / 23°33028.6122.4
Apr31° / 23°32027.311.92.5
May31° / 23°17620.811.83.2
Jun31° / 23°5510.511.84.3
Jul32° / 23°295.511.84.5
Aug34° / 24°71.611.93.9
Sep35° / 25°50.9123.1
Oct36° / 25°152.912.12.7
Nov35° / 25°395.912.22.6
Dec34° / 25°8412.712.22.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 70% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 10%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1928
2928
3928
4928
5928
6928
7928
8919
9919
10919
119010
129010
139010
149010
159010
169010
178911
188911
198911
208911
218911
228911
238911
248911
258911
268911
278911
288911
298812
308812

Chance of precipitation in September

Any precipitation

Itapecuru Mirim gets around 5 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 7% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
13
23
33
43
52
62
72
82
92
102
112
122
132
142
153
163
173
183
193
203
214
224
234
244
255
265
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 55% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
113861
213960
314158
414257
514356
614455
714554
814653
914752
1014752
1114752
1214752
1314752
1414752
1514752
1614653
1714653
1814554
1914554
2014455
2114455
2214455
2314356
2404357
2504357
2604357
2704456
2804456
2904456
3004456

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
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
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 5:59 AM to 5:46 AM, and sunset from 5:55 PM to 5:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:595:55
211.95:595:55
311.95:585:55
411.95:585:54
511.95:575:54
612.05:575:54
712.05:565:54
812.05:565:53
912.05:565:53
1012.05:555:53
1112.05:555:53
1212.05:545:52
1312.05:545:52
1412.05:535:52
1512.05:535:51
1612.05:525:51
1712.05:525:51
1812.05:515:51
1912.05:515:50
2012.05:505:50
2112.05:505:50
2212.05:505:50
2312.05:495:49
2412.05:495:49
2512.05:485:49
2612.05:485:49
2712.05:475:48
2812.05:475:48
2912.05:465:48
3012.05:465:48

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.24 kWh/m².

For context, solar energy here swings from a low near 4.33 kWh/m² to a high of 6.29 kWh/m² in October across the year — September's 6.24 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.1Intense
46.1Intense
56.1Intense
66.2Intense
76.2Intense
86.2Intense
96.2Intense
106.2Intense
116.2Intense
126.2Intense
136.2Intense
146.2Intense
156.2Intense
166.2Intense
176.3Intense
186.3Intense
196.3Intense
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 Itapecuru Mirim

In seasonPeak

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

Itapecuru Mirim'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 Itapecuru Mirim?

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

3.1
Sightseeing
5th-best month of the year
6.7
Beach & pool
3rd-best month of the year

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

What to pack for Itapecuru Mirim in September

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

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

light clothessun protection

UV index in Itapecuru Mirim 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 Itapecuru Mirim peaks around March 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 15 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 15UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Extreme
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Itapecuru Mirim 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 Itapecuru Mirim is worst in October — around 25 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (June, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateOct 2125 µg/m³Jun 199 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb16Moderate
Mar15Moderate
Apr13Moderate
May10Good
Jun8Good
Jul9Good
Aug12Good
Sep16Moderate
Oct25Moderate
Nov23Moderate
Dec17Moderate
Location & terrain

Where is Itapecuru Mirim?

Itapecuru Mirim sits at 3.4°S, 44.4°W, 20 m above sea level, in Brazil. The nearest listed city is Cantanhede, 27 km away.

Topography around Itapecuru Mirim

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

Within 3 km, the terrain around Itapecuru Mirim has only modest variations in elevation — a maximum elevation change of 41 m around an average of 21 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 101 m; within 80 km, only modest variations in elevation — a maximum elevation change of 121 m.

The land around Itapecuru Mirim is covered by grassland (47%) and trees (35%) within 3 km, trees (64%) and grassland (33%) within 16 km, and trees (48%) and grassland (29%) within 80 km.

3 km
41 m
16 km
101 m
80 km
121 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Cantanhede 27 km · Santa Rita 28 km · Miranda do Norte 31 km · Anajatuba 32 km · Matões do Norte 34 km · Pirapemas 40 km · Bacabeira 47 km · Arari 47 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 Itapecuru Mirim (-3.3925°, -44.3586°, elevation 20 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).