Nova Mamoré weather in September

In September, Nova Mamoré sees average daytime highs of 33°C and overnight lows near 22°C, with 70 mm of rain across 11.6 wet days and about 11.9 hours of daylight. It is the 1st-warmest and 9th-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 33% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 11 h 48 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Nova Mamoré's 4th-clearest and 3rd-windiest month. For the whole year in context, see Nova Mamoré's year-round climate.

Daytime high
33°
1st warmest
Overnight low
22°
5th coldest
Rainfall
70 mm
11.6 wet days
Daylight
11 h 54 min
6:17 AM – 6:14 PM
Cloud cover
57%
4th clearest
Wind
6 km/h
3rd windiest
Solar energy
5.6 kWh/m²
Travel score
3.2
out of 10

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 Nova Mamoré reaches about 33°C in the afternoon and slips back to 22°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 36°C. Set against its neighbours, September runs on par with August and on par with October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13422
23422
33422
43422
53422
63422
73422
83322
93322
103322
113322
123322
133322
143322
153322
163322
173323
183323
193323
203323
213323
223323
233323
243323
253323
263323
273323
283323
293323
303323

How September really feels in Nova Mamoré

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.

Nova Mamoré weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°25327.312.52.8
Feb30° / 23°24224.912.32.8
Mar30° / 23°24726.912.12.8
Apr30° / 23°16522.711.83.2
May30° / 22°7515.411.54.2
Jun31° / 21°265.711.45.3
Jul32° / 20°15311.55.3
Aug33° / 21°32511.74.0
Sep33° / 22°7011.611.93.2
Oct33° / 23°12518.612.22.8
Nov32° / 23°18622.612.52.8
Dec31° / 23°24426.112.62.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 22% of September, with mostly cloudy or overcast conditions the remaining 45%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17030
26931
36832
46733
56634
66535
76436
86337
96238
106139
115941
125842
135743
145644
155545
165347
175248
185149
195050
205050
214852
224753
234654
244555
254456
264456
274456
284357
294357
304159

Chance of precipitation in September

Any precipitation

Nova Mamoré gets around 70 mm of rain over 11.6 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 39% and peaks near 48% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
127
228
329
430
530
631
732
833
934
1035
1135
1236
1337
1438
1539
1640
1741
1842
1943
2043
2144
2244
2345
2445
2545
2646
2747
2847
2948
3048

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 74% of days. Sticky, muggy-or-worse air turns up on roughly 91% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
135819623
225818643
325718653
424718663
524717673
624717673
724717673
814617693
914616703
1013616713
1113516723
1213515733
1313515733
1413514743
1513514744
1613513754
1713412764
1813412764
1903412774
2002411794
2102411785
2202311795
2302310805
2402310796
2502310796
2602210806
270229807
280229807
290229807
300229798

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 48 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over September. Sunrise moves from 6:27 AM to 6:08 AM, and sunset from 6:15 PM to 6:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:276:15
211.86:266:15
311.86:266:15
411.86:256:15
511.86:256:15
611.86:246:15
711.96:236:15
811.96:236:15
911.96:226:14
1011.96:216:14
1111.96:216:14
1211.96:206:14
1311.96:196:14
1411.96:196:14
1511.96:186:14
1611.96:176:14
1712.06:176:14
1812.06:166:14
1912.06:156:14
2012.06:156:14
2112.06:146:14
2212.06:136:13
2312.06:136:13
2412.06:126:13
2512.06:116:13
2612.06:116:13
2712.16:106:13
2812.16:096:13
2912.16:096:13
3012.16:086:13

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.6 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 5.6 kWh/m² in September across the year — September's 5.6 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in September

Hazard calendar for Nova Mamoré

In seasonPeak

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

Nova Mamoré's rainy season runs October–April, 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 Nova Mamoré?

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

3.2
Sightseeing
5th-best month of the year
5.9
Beach & pool
4th-best month of the year

September is a weaker month for outdoor sightseeing in Nova Mamoré.

What to pack for Nova Mamoré in September

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

In September, Nova Mamoré sees daytime highs around 33°C and nights near 22°C. Pack light clothes. Worth having: rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

UV index in Nova Mamoré in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Nova Mamoré peaks around January 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 12 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateExtremeJan 19UV 15Sep 12UV 4
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May10Extreme
Jun9Very high
Jul9Very high
Aug6High
Sep3Moderate
Oct12Extreme
Nov13Extreme
Dec14Extreme

Air quality in Nova Mamoré 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 Nova Mamoré is worst in September — around 78 µg/m³ PM2.5 (unhealthy), about 9.3× the cleanest month (May, 8 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateUnhealthyModerateSep 1275 µg/m³May 218 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb13Moderate
Mar13Moderate
Apr10Good
May8Good
Jun9Good
Jul16Moderate
Aug63Unhealthy
Sep78Unhealthy
Oct29Moderate
Nov17Moderate
Dec12Moderate
Location & terrain

Where is Nova Mamoré?

Nova Mamoré sits at 10.4°S, 65.3°W, 133 m above sea level, in Brazil. The nearest listed city is Guajará Mirim, 42 km away.

Candeias do Jamari

Topography around Nova Mamoré

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

Within 3 km, the terrain around Nova Mamoré has only modest variations in elevation — a maximum elevation change of 58 m around an average of 136 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 135 m; within 80 km, significant variations in elevation — a maximum elevation change of 372 m.

The land around Nova Mamoré is covered by grassland (54%) and trees (35%) within 3 km, trees (55%) and grassland (39%) within 16 km, and trees (78%) and grassland (20%) within 80 km.

3 km
58 m
16 km
135 m
80 km
372 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Guajará Mirim 42 km · Guayaramerín 47 km · Riberalta 104 km · Buritis 165 km · Plácido de Castro 203 km · Alto Paraíso 233 km · Porto Velho 240 km · Candeias do Jamari 252 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 Nova Mamoré (-10.4019°, -65.3267°, elevation 133 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).