Igarapé Miri weather in September

In September, Igarapé Miri sees average daytime highs of 33°C and overnight lows near 24°C, with 23 mm of rain across 6.1 wet days and about 12 hours of daylight. It is the 1st-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 44% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 hours at the start of September to 12 hours by month's end. Set against the rest of the year, September is Igarapé Miri's 3rd-clearest and 2nd-windiest month. For the whole year in context, see Igarapé Miri's year-round climate.

Daytime high
33°
1st warmest
Overnight low
24°
10th coldest
Rainfall
23 mm
6.1 wet days
Daylight
12 hours
6:10 AM – 6:10 PM
Cloud cover
46%
3rd clearest
Wind
10 km/h
2nd windiest
Solar energy
6.39 kWh/m²
Travel score
4.1
out of 10

Igarapé Miri 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 33°C through the month.

A typical September day in Igarapé Miri reaches about 33°C in the afternoon and slips back to 24°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 34°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13224
23224
33224
43324
53324
63324
73324
83324
93324
103324
113324
123324
133324
143324
153324
163324
173324
183324
193324
203324
213324
223324
233324
243324
253324
263324
273325
283325
293325
303325

How September really feels in Igarapé Miri

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.

Igarapé Miri weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 24°27427.312.12.8
Feb30° / 24°36326.312.12.7
Mar30° / 24°44230.1122.6
Apr30° / 24°41728.9122.6
May30° / 24°27226.911.92.9
Jun31° / 24°10118.611.93.7
Jul31° / 24°6513.611.94.1
Aug32° / 24°328.511.94.2
Sep33° / 24°236.1124.1
Oct33° / 25°297.2123.9
Nov32° / 25°578.612.13.8
Dec32° / 24°13717.312.13.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 36% of September, with mostly cloudy or overcast conditions the remaining 20%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18515
28416
38416
48416
58218
68218
78218
88119
98119
108119
118020
128020
138020
147921
157921
167921
177921
187822
197822
207723
217822
227822
237822
247822
257822
267822
277822
287822
297723
307624

Chance of precipitation in September

Any precipitation

Igarapé Miri gets around 23 mm of rain over 6.1 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 21% and peaks near 23% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
123
223
323
422
522
622
722
822
921
1021
1121
1221
1321
1421
1521
1621
1720
1820
1920
2019
2119
2219
2319
2419
2519
2619
2719
2820
2920
3020

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 96% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
10937
20937
30937
40946
50946
60955
71945
81945
91945
101954
111954
121954
131954
141954
151954
161963
171963
180973
190973
200973
210973
220973
230973
240973
250973
260973
270973
280973
290973
300973

Wind in September

Winds average 10 km/h in September.

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

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 hours 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 0 minutes over September. Sunrise moves from 6:17 AM to 6:05 AM, and sunset from 6:14 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:176:14
212.06:166:14
312.06:166:14
412.06:166:14
512.06:156:13
612.06:156:13
712.06:146:13
812.06:146:12
912.06:136:12
1012.06:136:12
1112.06:136:11
1212.06:126:11
1312.06:126:11
1412.06:116:10
1512.06:116:10
1612.06:106:10
1712.06:106:10
1812.06:106:09
1912.06:096:09
2012.06:096:09
2112.06:086:08
2212.06:086:08
2312.06:086:08
2412.06:076:07
2512.06:076:07
2612.06:066:07
2712.06:066:06
2812.06:056:06
2912.06:056:06
3012.06:056:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.39 kWh/m².

For context, solar energy here swings from a low near 4.48 kWh/m² to a high of 6.5 kWh/m² in October across the year — September's 6.39 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.3Intense
46.3Intense
56.3Intense
66.3Intense
76.3Intense
86.3Intense
96.3Intense
106.3Intense
116.3Intense
126.3Intense
136.4Intense
146.4Intense
156.4Intense
166.4Intense
176.4Intense
186.4Intense
196.4Intense
206.5Intense
216.5Intense
226.5Intense
236.5Intense
246.5Intense
256.5Intense
266.5Intense
276.5Intense
286.5Intense
296.5Intense
306.5Intense
Planning a trip in September

Hazard calendar for Igarapé Miri

In seasonPeak

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

Igarapé Miri'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 Igarapé Miri?

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

4.1
Sightseeing
2nd-best month of the year
7.0
Beach & pool
1st-best month of the year

September is a reasonable time to visit Igarapé Miri for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Igarapé Miri in September

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

In September, Igarapé Miri sees daytime highs around 33°C and nights near 24°C. Pack light clothes and sun protection. About 6 days see rain.

light clothessun protection

UV index in Igarapé Miri 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 Igarapé Miri peaks around March 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 19 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 19UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul10Extreme
Aug10Extreme
Sep12Extreme
Oct11Extreme
Nov10Extreme
Dec10Extreme

Air quality in Igarapé Miri 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 Igarapé Miri is worst in November — around 36 µg/m³ PM2.5 (poor), about 3.6× the cleanest month (June, 10 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateNov 1435 µg/m³Jun 1210 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb19Moderate
Mar18Moderate
Apr15Moderate
May11Good
Jun10Good
Jul13Moderate
Aug15Moderate
Sep17Moderate
Oct27Moderate
Nov36Poor
Dec21Moderate
Location & terrain

Where is Igarapé Miri?

Igarapé Miri sits at 2.0°S, 49.0°W, 9 m above sea level, in Brazil. The nearest listed city is Moju, 23 km away.

Topography around Igarapé Miri

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

Within 3 km, the terrain around Igarapé Miri has only modest variations in elevation — a maximum elevation change of 28 m around an average of 11 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 38 m; within 80 km, only modest variations in elevation — a maximum elevation change of 65 m.

The land around Igarapé Miri is covered by trees (78%) within 3 km, trees (87%) within 16 km, and trees (73%) within 80 km.

3 km
28 m
16 km
38 m
80 km
65 m
treesgrasslandartificial surfaceswaterwetland
September weather nearby: Moju 23 km · Abaetetuba 30 km · Limoeiro do Ajuru 48 km · Muaná 57 km · Barcarena 64 km · Ponta de Pedras 66 km · Cametá 67 km · São Sebastião da Boa Vista 70 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 Igarapé Miri (-1.975°, -48.9597°, elevation 9 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).