Guariba weather in September

In September, Guariba sees average daytime highs of 30°C and overnight lows near 18°C, with 70 mm of rain across 7.4 wet days and about 11.9 hours of daylight. It is the 2nd-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 54% 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 Guariba's 4th-clearest and 1st-windiest month. For the whole year in context, see Guariba's year-round climate.

Daytime high
30°
2nd warmest
Overnight low
18°
5th coldest
Rainfall
70 mm
7.4 wet days
Daylight
11 h 54 min
7:11 AM – 7:04 PM
Cloud cover
42%
4th clearest
Wind
10 km/h
1st windiest
Solar energy
5.67 kWh/m²
Travel score
5.3
out of 10

Guariba 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 30°C through the month.

A typical September day in Guariba reaches about 30°C in the afternoon and slips back to 18°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 35°C. Set against its neighbours, September runs about 2°C warmer than August and on par with October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13017
23017
33017
43017
53017
63017
73018
83018
93018
103018
113018
123018
133018
143018
153018
163018
173018
183018
193018
203018
213018
223018
233018
243019
253019
263019
273019
283019
293019
303019

Guariba weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 21°27022.513.23.6
Feb30° / 21°18618.812.73.8
Mar30° / 20°16918.712.24.2
Apr29° / 19°689.111.55.8
May27° / 16°465.8117.5
Jun26° / 15°283.210.78.0
Jul27° / 15°202.710.88.1
Aug29° / 16°222.811.37.0
Sep30° / 18°707.411.95.3
Oct31° / 20°12313.312.54.3
Nov30° / 20°18117.6134.1
Dec30° / 21°22822.213.33.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17921
27822
37822
47723
57624
67624
77525
87426
97426
107327
117228
127030
137030
146931
156832
166733
176634
186634
196535
206436
216337
226139
236040
245941
255941
265842
275743
285644
295545
305545

Chance of precipitation in September

Any precipitation

Guariba gets around 70 mm of rain over 7.4 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 25% and peaks near 37% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
114
215
315
416
516
617
717
818
919
1019
1120
1220
1321
1422
1523
1624
1725
1826
1927
2028
2129
2230
2332
2433
2534
2635
2735
2836
2937
3037

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 39% of days. Sticky, muggy-or-worse air turns up on roughly 8% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15926141
25826151
35726152
45626162
55526172
65327182
75127193
85027203
94827213
104728224
114528234
124328245
134229245
144029256
153830256
163730267
173631267
183431278
193332279
2031322710
2130322711
2229322812
2327322813
2426312814
2525312816
2624302917
2723292918
2822282920
2922283021
3021273022

Wind in September

Winds average 10 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

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 7:26 AM to 6:57 AM, and sunset from 7:00 PM to 7:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.67:267:00
211.67:257:00
311.67:247:00
411.67:237:01
511.77:227:01
611.77:217:01
711.77:207:01
811.77:197:02
911.77:187:02
1011.87:177:02
1111.87:167:02
1211.87:157:03
1311.87:147:03
1411.87:137:03
1511.97:127:03
1611.97:117:04
1711.97:107:04
1811.97:097:04
1911.97:087:04
2012.07:077:05
2112.07:067:05
2212.07:057:05
2312.07:047:05
2412.07:037:06
2512.17:027:06
2612.17:017:06
2712.17:007:07
2812.16:597:07
2912.26:587:07
3012.26:577:07

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.67 kWh/m².

For context, solar energy here swings from a low near 3.89 kWh/m² to a high of 6.01 kWh/m² in October across the year — September's 5.67 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
Planning a trip in September

Hazard calendar for Guariba

In seasonPeak

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

Guariba's monsoon runs October–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 Guariba?

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

5.3
Sightseeing
6th-best month of the year
7.4
Beach & pool
4th-best month of the year

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

What to pack for Guariba in September

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

In September, Guariba sees daytime highs around 30°C and nights near 18°C. Pack light clothes. Worth having: sun protection. About 7 days see rain.

light clothessun protection

UV index in Guariba in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Guariba peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 21UV 15Jun 21UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Extreme
May8Very high
Jun6High
Jul7High
Aug9Very high
Sep9Very high
Oct10Extreme
Nov13Extreme
Dec14Extreme

Air quality in Guariba 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 Guariba is worst in September — around 46 µg/m³ PM2.5 (poor), about 5.3× the cleanest month (November, 9 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateGoodSep 1344 µg/m³Nov 229 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar11Good
Apr12Good
May13Moderate
Jun14Moderate
Jul15Moderate
Aug35Moderate
Sep46Poor
Oct18Moderate
Nov9Good
Dec10Good
Location & terrain

Where is Guariba?

Guariba sits at 21.4°S, 48.2°W, 619 m above sea level, in Brazil. The nearest listed city is Jaboticabal, 15 km away.

Topography around Guariba

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

Within 3 km, the terrain around Guariba has only modest variations in elevation — a maximum elevation change of 128 m around an average of 631 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 188 m; within 80 km, significant variations in elevation — a maximum elevation change of 551 m.

The land around Guariba is covered by cropland (63%) and artificial surfaces (23%) within 3 km, cropland (78%) within 16 km, and cropland (68%) and trees (21%) within 80 km.

3 km
128 m
16 km
188 m
80 km
551 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Jaboticabal 15 km · Pradópolis 17 km · Barrinha 20 km · Taquaritinga 29 km · Monte Alto 30 km · Matão 31 km · Sertãozinho 35 km · Pitangueiras 39 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 Guariba (-21.36°, -48.2283°, elevation 619 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).