Irituia weather in September

In September, Irituia sees average daytime highs of 34°C and overnight lows near 23°C, with 21 mm of rain across 5.6 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 34°C through the month. The sky is clear or mostly clear about 37% 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 Irituia's 2nd-clearest and 2nd-windiest month. For the whole year in context, see Irituia's year-round climate.

Daytime high
34°
3rd warmest
Overnight low
23°
8th coldest
Rainfall
21 mm
5.6 wet days
Daylight
12 hours
6:04 AM – 6:04 PM
Cloud cover
48%
2nd clearest
Wind
11 km/h
2nd windiest
Solar energy
6.01 kWh/m²
Travel score
3.6
out of 10

Irituia 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 34°C through the month.

A typical September day in Irituia reaches about 34°C in the afternoon and slips back to 23°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 35°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)
13323
23323
33323
43323
53323
63323
73323
83323
93323
103323
113323
123323
133323
143423
153423
163423
173423
183423
193423
203423
213423
223423
233423
243423
253423
263423
273423
283423
293423
303423

How September really feels in Irituia

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.

Irituia 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°19825.212.12.6
Feb31° / 23°27625.912.12.5
Mar31° / 23°35230.1122.5
Apr31° / 23°34828.9122.5
May31° / 23°21525.511.92.8
Jun31° / 23°9518.511.93.5
Jul32° / 22°6613.311.94.0
Aug33° / 23°287.611.94.0
Sep34° / 23°215.6123.6
Oct34° / 24°246123.3
Nov34° / 24°417.312.13.2
Dec33° / 24°891512.13.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 43% of September, with mostly cloudy or overcast conditions the remaining 21%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18119
28119
38119
48119
58020
68020
78020
88020
98020
108020
118020
128020
138020
147921
157921
168020
177921
187921
197921
207921
217921
227921
237921
247921
257822
267822
277822
287723
297723
307723

Chance of precipitation in September

Any precipitation

Irituia gets around 21 mm of rain over 5.6 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 19% and peaks near 21% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
120
220
320
420
520
620
720
820
920
1021
1121
1221
1321
1421
1521
1621
1720
1820
1920
2019
2119
2218
2318
2417
2517
2617
2716
2816
2916
3017

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 95% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)
1298
2298
3397
4397
5397
6397
7496
8496
9496
10496
11496
12496
13496
14496
15496
16595
17595
18595
19595
20595
21694
22694
23694
24793
25793
26892
27892
28892
29892
30991

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 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 6:10 AM to 5:59 AM, and sunset from 6:08 PM to 5:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:106:08
212.06:106:08
312.06:106:08
412.06:096:08
512.06:096:07
612.06:096:07
712.06:086:07
812.06:086:06
912.06:076:06
1012.06:076:06
1112.06:066:05
1212.06:066:05
1312.06:066:05
1412.06:056:04
1512.06:056:04
1612.06:046:04
1712.06:046:03
1812.06:046:03
1912.06:036:03
2012.06:036:03
2112.06:026:02
2212.06:026:02
2312.06:016:02
2412.06:016:01
2512.06:016:01
2612.06:006:01
2712.06:006:00
2812.05:596:00
2912.05:596:00
3012.05:595:59

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.01 kWh/m².

For context, solar energy here swings from a low near 4.09 kWh/m² to a high of 6.1 kWh/m² in October across the year — September's 6.01 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.9Bright
55.9Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
126.0Bright
136.0Bright
146.0Bright
156.0Bright
166.0Intense
176.0Intense
186.0Intense
196.0Intense
206.0Intense
216.1Intense
226.1Intense
236.1Intense
246.1Intense
256.1Intense
266.1Intense
276.1Intense
286.1Intense
296.1Intense
306.1Intense
Planning a trip in September

Hazard calendar for Irituia

In seasonPeak

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

Irituia'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 Irituia?

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

3.6
Sightseeing
3rd-best month of the year
6.8
Beach & pool
2nd-best month of the year

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

What to pack for Irituia in September

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

In September, Irituia sees daytime highs around 34°C and nights near 23°C. Pack light clothes and sun protection. About 6 days see rain.

light clothessun protection

UV index in Irituia 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 Irituia peaks around March 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 17 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 17UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul10Extreme
Aug11Extreme
Sep12Extreme
Oct12Extreme
Nov10Extreme
Dec11Extreme

Air quality in Irituia 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 Irituia is worst in November — around 21 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (July, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateNov 2020 µg/m³Jul 128 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar20Moderate
Apr15Moderate
May10Good
Jun8Good
Jul8Good
Aug9Good
Sep11Good
Oct13Moderate
Nov21Moderate
Dec19Moderate
Location & terrain

Where is Irituia?

Irituia sits at 1.8°S, 47.4°W, 18 m above sea level, in Brazil. The nearest listed city is São Miguel do Guamá, 17 km away.

Topography around Irituia

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

Within 3 km, the terrain around Irituia has only modest variations in elevation — a maximum elevation change of 60 m around an average of 19 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 80 m; within 80 km, only modest variations in elevation — a maximum elevation change of 163 m.

The land around Irituia is covered by trees (67%) and grassland (30%) within 3 km, trees (67%) and grassland (32%) within 16 km, and trees (60%) and grassland (39%) within 80 km.

3 km
60 m
16 km
80 m
80 km
163 m
treesgrasslandartificial surfaceswaterwetland
September weather nearby: São Miguel do Guamá 17 km · Mãe do Rio 33 km · São Domingos do Capim 39 km · Capitão Poço 42 km · Aurora do Pará 43 km · Ourém 43 km · Garrafão do Norte 47 km · Santa Maria do Pará 49 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 Irituia (-1.7711°, -47.4381°, elevation 18 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).