Bom Jesus das Selvas weather in September

In September, Bom Jesus das Selvas sees average daytime highs of 35°C and overnight lows near 23°C, with 9 mm of rain across 1.7 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 35°C through the month. The sky is clear or mostly clear about 57% of the time in September, and the air most often feels muggy.

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 Bom Jesus das Selvas's 3rd-clearest and 1st-windiest month. For the whole year in context, see Bom Jesus das Selvas's year-round climate.

Daytime high
35°
1st warmest
Overnight low
23°
9th coldest
Rainfall
9 mm
1.7 wet days
Daylight
12 hours
6:02 AM – 6:01 PM
Cloud cover
41%
3rd clearest
Wind
9 km/h
1st windiest
Solar energy
6.09 kWh/m²
Travel score
3.4
out of 10

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 Bom Jesus das Selvas reaches about 35°C in the afternoon and slips back to 23°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 33°C and 36°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13422
23422
33422
43422
53422
63422
73422
83422
93422
103522
113523
123523
133523
143523
153523
163523
173523
183523
193523
203523
213523
223523
233523
243523
253523
263523
273523
283423
293423
303423

How September really feels in Bom Jesus das Selvas

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.

Bom Jesus das Selvas 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° / 23°20225.112.22.9
Feb30° / 22°21924.412.12.9
Mar30° / 23°24328.2122.8
Apr30° / 23°18425.411.93.0
May31° / 22°9615.511.83.9
Jun32° / 22°194.411.74.9
Jul33° / 21°92.311.84.5
Aug34° / 22°40.711.93.8
Sep35° / 23°91.7123.4
Oct34° / 23°234.312.13.3
Nov33° / 23°5810.212.23.2
Dec32° / 23°1191712.33.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 57% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 27% of September, with mostly cloudy or overcast conditions the remaining 16%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18713
28713
38614
48614
58713
68713
78713
88614
98614
108614
118614
128614
138614
148515
158416
168416
178416
188317
198317
208317
218218
228218
238218
248119
258119
268020
277921
287921
297921
307822

Chance of precipitation in September

Any precipitation

Bom Jesus das Selvas gets around 9 mm of rain over 1.7 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 6% and peaks near 10% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
14
24
34
44
54
65
75
85
95
105
115
125
135
145
156
166
176
186
196
206
217
227
237
248
258
268
279
289
299
3010

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the muggy band about 61% of days. Sticky, muggy-or-worse air turns up on roughly 91% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
12135629
22135629
31135729
41135729
51135729
61135729
71145728
81145728
91135828
101135828
111135828
121125928
131116028
141116028
151106128
16196228
17186229
18176329
19166330
20156331
21146431
22146332
23136333
24126433
25126334
26026335
27016435
28016336
29016336
30016336

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 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 6:10 AM to 5:56 AM, and sunset from 6:05 PM to 5:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:106:05
211.96:096:04
311.96:096:04
411.96:086:04
511.96:086:04
611.96:076:03
711.96:076:03
811.96:066:03
911.96:066:03
1012.06:056:02
1112.06:056:02
1212.06:046:02
1312.06:046:02
1412.06:036:02
1512.06:036:01
1612.06:026:01
1712.06:026:01
1812.06:016:01
1912.06:016:00
2012.06:006:00
2112.06:006:00
2212.05:596:00
2312.05:595:59
2412.05:595:59
2512.05:585:59
2612.05:585:59
2712.05:575:58
2812.05:575:58
2912.05:565:58
3012.05:565:58

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.09 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.28 kWh/m² to a high of 6.09 kWh/m² in September across the year — September's 6.09 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.0Bright
26.0Intense
36.0Intense
46.0Intense
56.0Intense
66.0Intense
76.0Intense
86.1Intense
96.1Intense
106.1Intense
116.1Intense
126.1Intense
136.1Intense
146.1Intense
156.1Intense
166.1Intense
176.1Intense
186.1Intense
196.1Intense
206.1Intense
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 Bom Jesus das Selvas

In seasonPeak

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

Bom Jesus das Selvas's monsoon runs December–April, 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 Bom Jesus das Selvas?

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

3.4
Sightseeing
5th-best month of the year
7.1
Beach & pool
4th-best month of the year

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

What to pack for Bom Jesus das Selvas in September

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

In September, Bom Jesus das Selvas sees daytime highs around 35°C and nights near 23°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Bom Jesus das Selvas 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 Bom Jesus das Selvas peaks around March 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 11 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 14UV 15Dec 11UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Extreme
Jul10Extreme
Aug11Extreme
Sep12Extreme
Oct12Extreme
Nov10Extreme
Dec10Very high

Air quality in Bom Jesus das Selvas 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 Bom Jesus das Selvas is worst in November — around 43 µg/m³ PM2.5 (poor), about 6.0× the cleanest month (June, 7 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModeratePoorModerateNov 1442 µg/m³Jun 157 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb14Moderate
Mar13Moderate
Apr11Good
May9Good
Jun7Good
Jul10Good
Aug15Moderate
Sep16Moderate
Oct35Moderate
Nov43Poor
Dec30Moderate
Location & terrain

Where is Bom Jesus das Selvas?

Bom Jesus das Selvas sits at 4.5°S, 46.9°W, 199 m above sea level, in Brazil. The nearest listed city is Buriticupu, 48 km away.

Topography around Bom Jesus das Selvas

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Bom Jesus das Selvas.

Within 3 km, the terrain around Bom Jesus das Selvas has only modest variations in elevation — a maximum elevation change of 145 m around an average of 165 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 231 m; within 80 km, significant variations in elevation — a maximum elevation change of 401 m.

The land around Bom Jesus das Selvas is covered by grassland (54%) and trees (35%) within 3 km, trees (50%) and grassland (48%) within 16 km, and trees (55%) and grassland (41%) within 80 km.

3 km
145 m
16 km
231 m
80 km
401 m
treesshrubsgrasslandcroplandartificial surfaces
September weather nearby: Buriticupu 48 km · Itinga do Maranhão 75 km · Dom Eliseu 76 km · Açailândia 89 km · Arame 104 km · Ulianópolis 109 km · Amarante do Maranhão 121 km · João Lisboa 123 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 Bom Jesus das Selvas (-4.4835°, -46.8533°, elevation 199 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).