Jaru weather in September

In September, Jaru sees average daytime highs of 34°C and overnight lows near 22°C, with 82 mm of rain across 13.5 wet days and about 11.9 hours of daylight. It is the 2nd-warmest and 8th-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 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 Jaru's 4th-clearest and 4th-windiest month. For the whole year in context, see Jaru's year-round climate.

Daytime high
34°
2nd warmest
Overnight low
22°
9th coldest
Rainfall
82 mm
13.5 wet days
Daylight
11 h 54 min
6:06 AM – 6:02 PM
Cloud cover
56%
4th clearest
Wind
6 km/h
4th windiest
Solar energy
5.65 kWh/m²
Travel score
3.0
out of 10

Jaru 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 Jaru reaches about 34°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 about 1°C warmer than October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13422
23422
33422
43422
53422
63422
73422
83422
93422
103422
113422
123422
133422
143423
153423
163423
173423
183423
193323
203323
213323
223323
233323
243323
253323
263323
273323
283323
293323
303323

How September really feels in Jaru

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.

Jaru weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 22°27528.212.52.9
Feb30° / 22°27126.212.32.8
Mar30° / 22°24727.912.12.9
Apr30° / 22°15323.111.83.3
May30° / 22°7514.711.54.4
Jun31° / 21°173.911.45.2
Jul33° / 20°102.211.54.7
Aug34° / 21°254.911.73.6
Sep34° / 22°8213.511.93.0
Oct32° / 23°13620.312.22.8
Nov31° / 23°19923.812.52.9
Dec30° / 23°24327.112.62.9

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 26% of September, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17228
27129
37030
47030
57030
66931
76931
86733
96733
106634
116436
126436
136337
146139
156040
165941
175743
185644
195446
205347
215248
225050
235050
244951
254753
264753
274654
284654
294555
304456

Chance of precipitation in September

Any precipitation

Jaru gets around 82 mm of rain over 13.5 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 44% and peaks near 60% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
130
231
332
433
534
635
735
836
937
1037
1138
1239
1340
1441
1542
1643
1745
1846
1947
2049
2150
2252
2353
2454
2555
2657
2758
2859
2959
3060

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 62% of days. Sticky, muggy-or-worse air turns up on roughly 88% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
147163341
236153342
336143343
436143345
525133346
625133347
725123348
825123250
924113152
1014113153
1114113054
1214102956
1314102857
141392760
151382662
161382662
170372565
180362467
190362368
200352270
210342172
220242074
230231976
240231877
250231778
260221680
270221680
280221581
290121483
300111484

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

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
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 6:16 AM to 5:57 AM, and sunset from 6:03 PM to 6:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:166:03
211.86:156:03
311.86:146:03
411.86:146:03
511.86:136:03
611.86:136:03
711.96:126:03
811.96:116:03
911.96:116:03
1011.96:106:03
1111.96:096:03
1211.96:096:03
1311.96:086:03
1411.96:076:03
1511.96:076:03
1611.96:066:02
1712.06:056:02
1812.06:056:02
1912.06:046:02
2012.06:036:02
2112.06:036:02
2212.06:026:02
2312.06:016:02
2412.06:016:02
2512.06:006:02
2612.05:596:02
2712.15:596:02
2812.15:586:02
2912.15:576:02
3012.15:576:02

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.65 kWh/m².

For context, solar energy here swings from a low near 4.46 kWh/m² to a high of 5.68 kWh/m² in October across the year — September's 5.65 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.7Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in September

Hazard calendar for Jaru

In seasonPeak

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

Jaru'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 Jaru?

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

3.0
Sightseeing
6th-best month of the year
5.7
Beach & pool
5th-best month of the year

September is a weaker month for outdoor sightseeing in Jaru.

What to pack for Jaru in September

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

In September, Jaru sees daytime highs around 34°C and nights near 22°C. Pack light clothes. Worth having: rain gear and sun protection. About 14 days see rain.

light clothesrain gearsun protection

UV index in Jaru in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Jaru peaks around January 24 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 12 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateExtremeJan 24UV 15Sep 12UV 3
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May10Extreme
Jun9Very high
Jul9Very high
Aug6High
Sep3Moderate
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Jaru 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 Jaru is worst in September — around 57 µg/m³ PM2.5 (unhealthy), about 7.3× the cleanest month (June, 8 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodPoorModerateSep 1454 µg/m³Jun 198 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb12Good
Mar13Moderate
Apr10Good
May9Good
Jun8Good
Jul8Good
Aug39Poor
Sep57Unhealthy
Oct24Moderate
Nov17Moderate
Dec14Moderate
Location & terrain

Where is Jaru?

Jaru sits at 10.4°S, 62.5°W, 159 m above sea level, in Brazil. The nearest listed city is Ouro Preto do Oeste, 44 km away.

Topography around Jaru

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

Within 3 km, the terrain around Jaru has only modest variations in elevation — a maximum elevation change of 78 m around an average of 161 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 230 m; within 80 km, significant variations in elevation — a maximum elevation change of 465 m.

The land around Jaru is covered by grassland (40%), artificial surfaces (31%) and trees (27%) within 3 km, grassland (73%) and trees (25%) within 16 km, and grassland (66%) and trees (33%) within 80 km.

3 km
78 m
16 km
230 m
80 km
465 m
treesgrasslandartificial surfacesbare terrainwater
September weather nearby: Ouro Preto do Oeste 44 km · Ji Paraná 75 km · Ariquemes 86 km · Presidente Médici 103 km · Alto Paraíso 122 km · Machadinho d'Oeste 123 km · São Miguel do Guaporé 142 km · Buritis 151 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 Jaru (-10.4389°, -62.4664°, elevation 159 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).