Alenquer weather in September

In September, Alenquer sees average daytime highs of 33°C and overnight lows near 26°C, with 54 mm of rain across 7.6 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 33°C through the month. The sky is clear or mostly clear about 53% 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 Alenquer's 2nd-clearest and 1st-windiest month. For the whole year in context, see Alenquer's year-round climate.

Daytime high
33°
1st warmest
Overnight low
26°
11th coldest
Rainfall
54 mm
7.6 wet days
Daylight
12 hours
6:34 AM – 6:33 PM
Cloud cover
45%
2nd clearest
Wind
9 km/h
1st windiest
Solar energy
6.3 kWh/m²
Travel score
3.6
out of 10

Alenquer 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 Alenquer reaches about 33°C in the afternoon and slips back to 26°C overnight — a 8°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°151015202530
Avg high (°C)Avg low (°C)
13326
23326
33326
43326
53326
63326
73326
83326
93326
103326
113326
123326
133326
143326
153326
163326
173326
183326
193426
203426
213426
223426
233426
243426
253426
263426
273426
283426
293426
303426

How September really feels in Alenquer

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.

Alenquer 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
Jan31° / 25°32825.412.13.0
Feb30° / 25°30524.212.12.9
Mar30° / 25°38928.4122.8
Apr30° / 25°38028.1122.7
May30° / 25°3032811.92.9
Jun31° / 24°14321.411.93.5
Jul31° / 24°8214.911.94.1
Aug33° / 25°507.911.94.1
Sep33° / 26°547.6123.6
Oct33° / 26°799.7123.3
Nov33° / 26°13014.312.13.2
Dec32° / 25°18518.812.13.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 29%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17624
27624
37624
47624
57426
67426
77426
87327
97327
107327
117426
127327
137327
147327
157327
167228
177129
187129
197129
207129
216931
226931
236832
246832
256832
266733
276733
286634
296535
306436

Chance of precipitation in September

Any precipitation

Alenquer gets around 54 mm of rain over 7.6 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 25% and peaks near 29% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
123
223
323
424
524
625
725
825
925
1026
1126
1226
1326
1426
1525
1625
1725
1825
1925
2025
2125
2225
2325
2426
2526
2627
2727
2828
2928
3029

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 71% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
117623
217623
327523
427523
527523
637423
737423
837423
937324
1047224
1147224
1247224
1347125
1447125
1547125
1647125
1747125
1847026
1947026
2047026
2147026
2246927
2346927
2446927
2546927
2646828
2756728
2856728
2956728
3056629

Wind in September

Winds average 9 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 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

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 6:40 AM to 6:28 AM, and sunset from 6:38 PM to 6:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:406:38
212.06:396:37
312.06:396:37
412.06:396:37
512.06:386:36
612.06:386:36
712.06:376:36
812.06:376:35
912.06:376:35
1012.06:366:35
1112.06:366:35
1212.06:356:34
1312.06:356:34
1412.06:346:34
1512.06:346:33
1612.06:346:33
1712.06:336:33
1812.06:336:32
1912.06:326:32
2012.06:326:32
2112.06:316:31
2212.06:316:31
2312.06:316:31
2412.06:306:30
2512.06:306:30
2612.06:296:30
2712.06:296:30
2812.06:296:29
2912.06:286:29
3012.06:286:29

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.3 kWh/m².

For context, solar energy here swings from a low near 4.26 kWh/m² to a high of 6.36 kWh/m² in October across the year — September's 6.3 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.0Intense
26.1Intense
36.1Intense
46.1Intense
56.1Intense
66.1Intense
76.1Intense
86.2Intense
96.2Intense
106.2Intense
116.2Intense
126.2Intense
136.3Intense
146.3Intense
156.3Intense
166.3Intense
176.3Intense
186.3Intense
196.4Intense
206.4Intense
216.4Intense
226.4Intense
236.4Intense
246.4Intense
256.4Intense
266.4Intense
276.5Intense
286.5Intense
296.5Intense
306.5Intense
Planning a trip in September

Hazard calendar for Alenquer

In seasonPeak

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

Alenquer'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 Alenquer?

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
6.7
Beach & pool
2nd-best month of the year

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

What to pack for Alenquer in September

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

In September, Alenquer sees daytime highs around 33°C and nights near 26°C. Pack light clothes and sun protection. About 8 days see rain.

light clothessun protection

UV index in Alenquer 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 Alenquer peaks around March 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 13UV 15Jul 12UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Extreme
Sep11Extreme
Oct12Extreme
Nov10Very high
Dec11Extreme

Air quality in Alenquer 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 Alenquer is worst in November — around 31 µg/m³ PM2.5 (moderate), about 3.5× the cleanest month (June, 9 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateNov 1530 µg/m³Jun 209 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb16Moderate
Mar16Moderate
Apr14Moderate
May10Good
Jun9Good
Jul9Good
Aug12Good
Sep15Moderate
Oct24Moderate
Nov31Moderate
Dec23Moderate
Location & terrain

Where is Alenquer?

Alenquer sits at 1.9°S, 54.7°W, 32 m above sea level, in Brazil. The nearest listed city is Santarém, 56 km away.

Topography around Alenquer

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

Within 3 km, the terrain around Alenquer has only modest variations in elevation — a maximum elevation change of 56 m around an average of 19 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 93 m; within 80 km, large variations in elevation — a maximum elevation change of 691 m.

The land around Alenquer is covered by grassland (39%) and trees (23%) within 3 km, trees (34%) and grassland (33%) within 16 km, and trees (49%), grassland (23%) and water (23%) within 80 km.

3 km
56 m
16 km
93 m
80 km
691 m
treesgrasslandartificial surfaceswaterwetland
September weather nearby: Santarém 56 km · Monte Alegre 73 km · Belterra 80 km · Mojuí dos Campos 83 km · Óbidos 87 km · Oriximiná 127 km · Prainha 141 km · Juruti 152 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 Alenquer (-1.9417°, -54.7383°, elevation 32 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).