Guarantã do Norte weather in September

In September, Guarantã do Norte sees average daytime highs of 34°C and overnight lows near 23°C, with 48 mm of rain across 8.1 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 41% 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 Guarantã do Norte's 4th-clearest and 5th-windiest month. For the whole year in context, see Guarantã do Norte's year-round climate.

Daytime high
34°
2nd warmest
Overnight low
23°
11th coldest
Rainfall
48 mm
8.1 wet days
Daylight
11 h 54 min
6:36 AM – 6:32 PM
Cloud cover
51%
4th clearest
Wind
6 km/h
5th windiest
Solar energy
5.81 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 34°C through the month.

A typical September day in Guarantã do Norte reaches about 34°C in the afternoon and slips back to 23°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 36°C. Set against its neighbours, September runs on par with August and about 2°C warmer than October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13422
23422
33422
43422
53422
63422
73422
83422
93423
103423
113423
123423
133423
143423
153423
163423
173423
183423
193423
203423
213423
223423
233323
243323
253323
263323
273323
283323
293323
303323

How September really feels in Guarantã do Norte

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.

Guarantã do Norte 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°27728.412.52.9
Feb30° / 22°2542612.32.8
Mar30° / 22°23027.212.12.9
Apr30° / 22°14021.211.83.4
May31° / 22°418.511.64.6
Jun32° / 21°51.111.45.0
Jul33° / 20°20.311.54.6
Aug34° / 21°91.611.73.6
Sep34° / 23°488.111.93.2
Oct32° / 23°13519.412.23.0
Nov31° / 22°20924.512.52.9
Dec30° / 22°25827.312.62.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% 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 37%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17525
27426
37327
47228
57228
67129
77030
86931
96931
106733
116733
126733
136535
146535
156436
166436
176238
186139
196139
206040
215842
225842
235743
245644
255545
265347
275347
285149
295050
304951

Chance of precipitation in September

Any precipitation

Guarantã do Norte gets around 48 mm of rain over 8.1 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 28% and peaks near 48% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
113
213
314
415
516
616
717
818
919
1020
1121
1222
1323
1424
1525
1626
1727
1828
1930
2032
2133
2235
2337
2439
2540
2642
2744
2845
2947
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 35% of days. Sticky, muggy-or-worse air turns up on roughly 65% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1524352512
2522342613
3421342614
4420332715
5419322816
6419322817
7418312919
8417302920
9416293021
10415283022
11414273024
12314273126
13313263127
14312253229
15211243231
16210233332
1729223334
1828213436
1917193439
2016173441
2116163443
2215143446
2314133448
2404113352
2503103354
260393256
270283159
280273061
290262963
300162766

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 5 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
37calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
255calm
265calm
275calm
285calm
295calm
305calm

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 6:45 AM to 6:27 AM, and sunset from 6:34 PM to 6:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:456:34
211.86:456:33
311.86:446:33
411.86:436:33
511.86:436:33
611.96:426:33
711.96:416:33
811.96:416:33
911.96:406:33
1011.96:396:33
1111.96:396:33
1211.96:386:33
1311.96:386:33
1411.96:376:33
1511.96:366:32
1611.96:366:32
1712.06:356:32
1812.06:346:32
1912.06:346:32
2012.06:336:32
2112.06:326:32
2212.06:326:32
2312.06:316:32
2412.06:306:32
2512.06:306:32
2612.06:296:32
2712.06:286:31
2812.16:286:31
2912.16:276:31
3012.16:276:31

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.81 kWh/m².

For context, solar energy here swings from a low near 4.84 kWh/m² to a high of 5.83 kWh/m² in October across the year — September's 5.81 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
Planning a trip in September

Hazard calendar for Guarantã do Norte

In seasonPeak

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

Guarantã do Norte's monsoon runs October–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 Guarantã do Norte?

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

3.2
Sightseeing
6th-best month of the year
6.3
Beach & pool
5th-best month of the year

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

What to pack for Guarantã do Norte in September

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

In September, Guarantã do Norte sees daytime highs around 34°C and nights near 23°C. Pack light clothes. Worth having: rain gear and sun protection. About 8 days see rain.

light clothesrain gearsun protection

UV index in Guarantã do Norte in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Guarantã do Norte peaks around February 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 14 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 19UV 15Sep 14UV 8
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May10Very high
Jun9Very high
Jul9Very high
Aug10Very high
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec12Extreme

Air quality in Guarantã do Norte 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 Guarantã do Norte is worst in September — around 98 µg/m³ PM2.5 (unhealthy), about 13.6× the cleanest month (July, 7 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateUnhealthyModerateSep 1590 µg/m³Jul 97 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb9Good
Mar9Good
Apr9Good
May8Good
Jun8Good
Jul7Good
Aug41Poor
Sep98Unhealthy
Oct28Moderate
Nov15Moderate
Dec11Good
Location & terrain

Where is Guarantã do Norte?

Guarantã do Norte sits at 10.0°S, 54.9°W, 334 m above sea level, in Brazil. The nearest listed city is Matupá, 24 km away.

SorrisoNovo ProgressoJuaraTapurah

Topography around Guarantã do Norte

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

Within 3 km, the terrain around Guarantã do Norte has only modest variations in elevation — a maximum elevation change of 47 m around an average of 283 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 242 m; within 80 km, significant variations in elevation — a maximum elevation change of 406 m.

The land around Guarantã do Norte is covered by grassland (51%), trees (24%) and artificial surfaces (23%) within 3 km, trees (44%) and grassland (43%) within 16 km, and trees (57%) and grassland (33%) within 80 km.

3 km
47 m
16 km
242 m
80 km
406 m
treesgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Matupá 24 km · Peixoto de Azevedo 31 km · Colíder 113 km · Sinop 222 km · Sorriso 302 km · Novo Progresso 316 km · Juara 320 km · Tapurah 356 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 Guarantã do Norte (-9.9505°, -54.9082°, elevation 334 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).