Óbidos weather in September

In September, Óbidos sees average daytime highs of 32°C and overnight lows near 26°C, with 80 mm of rain across 10.7 wet days and about 12 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 50% 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 Óbidos's 2nd-clearest and 1st-windiest month. For the whole year in context, see Óbidos's year-round climate.

Daytime high
32°
1st warmest
Overnight low
26°
11th coldest
Rainfall
80 mm
10.7 wet days
Daylight
12 hours
6:37 AM – 6:36 PM
Cloud cover
45%
2nd clearest
Wind
10 km/h
1st windiest
Solar energy
6.15 kWh/m²
Travel score
4.1
out of 10

Óbidos 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 32°C through the month.

A typical September day in Óbidos reaches about 32°C in the afternoon and slips back to 26°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 33°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13226
23226
33226
43226
53226
63226
73226
83226
93226
103226
113226
123226
133226
143226
153226
163226
173226
183226
193226
203226
213226
223226
233226
243226
253226
263226
273226
283226
293226
303226

How September really feels in Óbidos

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.

Óbidos weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 25°37527.612.13.1
Feb29° / 25°34025.212.13.1
Mar29° / 25°43728.8123.0
Apr29° / 25°42129122.9
May29° / 25°34428.911.93.1
Jun29° / 25°17323.111.93.7
Jul30° / 25°10917.711.94.3
Aug31° / 26°7311.511.94.5
Sep32° / 26°8010.7124.1
Oct32° / 26°10613.3123.7
Nov31° / 26°16217.612.13.5
Dec31° / 26°23222.412.13.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 32%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17327
27327
37129
47129
57129
67129
76931
86931
96931
107030
116931
126931
136931
146931
156832
166832
176832
186832
196832
206832
216733
226733
236733
246634
256634
266535
276436
286337
296238
306139

Chance of precipitation in September

Any precipitation

Óbidos gets around 80 mm of rain over 10.7 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 36% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
135
236
336
436
536
636
736
836
937
1037
1137
1237
1337
1437
1537
1636
1736
1836
1935
2035
2135
2235
2335
2435
2535
2635
2735
2835
2935
3036

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 75% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
107723
207723
317623
417623
517623
617623
717524
817524
917524
1017524
1117524
1217524
1317524
1417425
1517425
1617425
1717425
1817425
1917425
2007525
2107525
2207525
2307624
2407624
2507624
2607624
2707624
2807624
2917524
3017524

Wind in September

Winds average 10 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 9 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
19calm
29calm
39calm
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 6:43 AM to 6:31 AM, and sunset from 6:41 PM to 6:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:436:41
212.06:426:40
312.06:426:40
412.06:426:40
512.06:416:40
612.06:416:39
712.06:406:39
812.06:406:39
912.06:406:38
1012.06:396:38
1112.06:396:38
1212.06:386:37
1312.06:386:37
1412.06:386:37
1512.06:376:36
1612.06:376:36
1712.06:366:36
1812.06:366:35
1912.06:356:35
2012.06:356:35
2112.06:356:35
2212.06:346:34
2312.06:346:34
2412.06:336:34
2512.06:336:33
2612.06:336:33
2712.06:326:33
2812.06:326:32
2912.06:316:32
3012.06:316:32

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.15 kWh/m².

For context, solar energy here swings from a low near 4 kWh/m² to a high of 6.16 kWh/m² in October across the year — September's 6.15 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
36.0Bright
46.0Bright
56.0Bright
66.0Bright
76.0Intense
86.0Intense
96.0Intense
106.0Intense
116.1Intense
126.1Intense
136.1Intense
146.1Intense
156.1Intense
166.2Intense
176.2Intense
186.2Intense
196.2Intense
206.2Intense
216.2Intense
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 Óbidos

In seasonPeak

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

Óbidos's rainy season runs December–May, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Óbidos?

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

4.1
Sightseeing
3rd-best month of the year
6.5
Beach & pool
2nd-best month of the year

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

What to pack for Óbidos in September

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

In September, Óbidos sees daytime highs around 32°C and nights near 26°C. Pack light clothes and sun protection. Worth having: rain gear. About 11 days see rain.

light clothessun protectionrain gear

UV index in Óbidos in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Óbidos peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 17 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeExtremeExtremeMar 12UV 15Nov 17UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Extreme
Sep11Extreme
Oct12Extreme
Nov9Very high
Dec11Extreme

Air quality in Óbidos 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 Óbidos is worst in November — around 38 µg/m³ PM2.5 (poor), about 4.0× the cleanest month (June, 10 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateModerateNov 1637 µg/m³Jun 1410 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb16Moderate
Mar16Moderate
Apr14Moderate
May10Good
Jun10Good
Jul11Good
Aug13Moderate
Sep16Moderate
Oct26Moderate
Nov38Poor
Dec24Moderate
Location & terrain

Where is Óbidos?

Óbidos sits at 1.9°S, 55.5°W, 27 m above sea level, in Brazil. The nearest listed city is Oriximiná, 42 km away.

Topography around Óbidos

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

Within 3 km, the terrain around Óbidos has only modest variations in elevation — a maximum elevation change of 105 m around an average of 23 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 122 m; within 80 km, significant variations in elevation — a maximum elevation change of 342 m.

The land around Óbidos is covered by water (40%) and trees (34%) within 3 km, trees (46%) and water (26%) within 16 km, and trees (60%) and water (20%) within 80 km.

3 km
105 m
16 km
122 m
80 km
342 m
treesgrasslandartificial surfaceswaterwetland
September weather nearby: Oriximiná 42 km · Juruti 69 km · Alenquer 87 km · Belterra 103 km · Santarém 107 km · Terra Santa 110 km · Mojuí dos Campos 129 km · Nhamundá 136 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 Óbidos (-1.9175°, -55.5181°, elevation 27 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).