Guaíra weather in September

In September, Guaíra sees average daytime highs of 32°C and overnight lows near 20°C, with 49 mm of rain across 6.1 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 32°C through the month. The sky is clear or mostly clear about 57% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Guaíra's 4th-clearest and 1st-windiest month. For the whole year in context, see Guaíra's year-round climate.

Daytime high
32°
2nd warmest
Overnight low
20°
5th coldest
Rainfall
49 mm
6.1 wet days
Daylight
11 h 54 min
7:11 AM – 7:04 PM
Cloud cover
40%
4th clearest
Wind
9 km/h
1st windiest
Solar energy
5.83 kWh/m²
Travel score
4.6
out of 10

Guaíra is 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 32°C through the month.

A typical September day in Guaíra reaches about 32°C in the afternoon and slips back to 20°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 36°C. Set against its neighbours, September runs about 2°C warmer than August and on par with October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13219
23219
33219
43219
53219
63220
73220
83220
93220
103220
113220
123220
133220
143220
153220
163220
173220
183220
193220
203220
213220
223220
233221
243221
253221
263221
273221
283221
293221
303221

How September really feels in Guaíra

Once humidity and wind are folded in, September averages 17 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
17
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.

Guaíra 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°25122.113.13.5
Feb30° / 22°17718.212.73.6
Mar30° / 22°16018.912.13.9
Apr30° / 20°618.511.55.3
May28° / 18°334.7117.1
Jun28° / 17°172.210.87.9
Jul28° / 17°111.610.97.7
Aug30° / 18°121.711.36.2
Sep32° / 20°496.111.94.6
Oct32° / 22°9911.912.53.8
Nov31° / 22°16417.9133.7
Dec30° / 22°21822.513.23.4

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 12% of September, with mostly cloudy or overcast conditions the remaining 31%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17921
27921
37921
47822
57822
67723
77723
87624
97525
107426
117426
127228
137129
147129
157030
166832
176832
186733
196733
206634
216436
226337
236238
246139
256139
266040
275941
285941
295842
305743

Chance of precipitation in September

Any precipitation

Guaíra gets around 49 mm of rain over 6.1 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 20% and peaks near 34% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
111
211
311
412
512
613
713
814
915
1015
1116
1216
1317
1418
1519
1619
1720
1821
1922
2023
2125
2226
2327
2428
2529
2630
2731
2832
2933
3034

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 37% of days. Sticky, muggy-or-worse air turns up on roughly 12% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
156261530
255271530
354271630
453271730
552261840
651261940
750261950
848262050
947262160
1045262270
1144272270
1242272380
1340272480
1439272590
15372826100
16352826110
17342827110
18322828120
19302829130
20292730140
21272730150
22262631170
23252532180
24232432200
25222333210
26222233231
27212133251
28202133261
29192032281
30191932291

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 36 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over September. Sunrise moves from 7:25 AM to 6:58 AM, and sunset from 7:01 PM to 7:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.67:257:01
211.67:247:01
311.67:237:01
411.67:227:01
511.77:227:02
611.77:217:02
711.77:207:02
811.77:197:02
911.77:187:03
1011.87:177:03
1111.87:167:03
1211.87:157:03
1311.87:147:03
1411.87:137:04
1511.97:127:04
1611.97:117:04
1711.97:107:04
1811.97:097:05
1911.97:087:05
2012.07:077:05
2112.07:067:05
2212.07:057:05
2312.07:047:06
2412.07:037:06
2512.17:027:06
2612.17:017:06
2712.17:007:07
2812.16:597:07
2912.16:597:07
3012.26:587:07

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.83 kWh/m².

For context, solar energy here swings from a low near 4.05 kWh/m² to a high of 6.16 kWh/m² in October across the year — September's 5.83 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.9Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
286.0Bright
296.0Bright
306.0Bright
Planning a trip in September

Hazard calendar for Guaíra

In seasonPeak

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

Guaíra's monsoon runs November–March, 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 Guaíra?

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

4.6
Sightseeing
6th-best month of the year
7.3
Beach & pool
5th-best month of the year

September is a reasonable time to visit Guaíra for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Guaíra in September

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

In September, Guaíra sees daytime highs around 32°C and nights near 20°C. Pack light clothes. Worth having: sun protection. About 6 days see rain.

light clothessun protection

UV index in Guaíra in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Guaíra peaks around January 23 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 23UV 15Jun 21UV 7
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Extreme
May8Very high
Jun7High
Jul7High
Aug9Very high
Sep10Very high
Oct11Extreme
Nov14Extreme
Dec14Extreme

Air quality in Guaíra 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 Guaíra is worst in September — around 42 µg/m³ PM2.5 (poor), about 6.0× the cleanest month (November, 7 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodSep 1539 µg/m³Nov 227 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb9Good
Mar9Good
Apr9Good
May10Good
Jun10Good
Jul10Good
Aug20Moderate
Sep42Poor
Oct15Moderate
Nov7Good
Dec8Good
Location & terrain

Where is Guaíra?

Guaíra sits at 20.3°S, 48.3°W, 516 m above sea level, in Brazil. The nearest listed city is Miguelópolis, 33 km away.

Topography around Guaíra

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

Within 3 km, the terrain around Guaíra has only modest variations in elevation — a maximum elevation change of 51 m around an average of 510 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 151 m; within 80 km, significant variations in elevation — a maximum elevation change of 537 m.

The land around Guaíra is covered by cropland (47%) and artificial surfaces (26%) within 3 km, cropland (81%) within 16 km, and cropland (71%) within 80 km.

3 km
51 m
16 km
151 m
80 km
537 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Miguelópolis 33 km · Barretos 38 km · Conceição das Alagoas 46 km · Colina 50 km · Guará 52 km · Morro Agudo 53 km · Ituverava 55 km · São Joaquim da Barra 56 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 Guaíra (-20.3183°, -48.3106°, elevation 516 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).