Pirassununga weather in September

In September, Pirassununga sees average daytime highs of 29°C and overnight lows near 17°C, with 66 mm of rain across 7.9 wet days and about 11.9 hours of daylight. It is the 4th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 53% 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 Pirassununga's 4th-clearest and 1st-windiest month. For the whole year in context, see Pirassununga's year-round climate.

Daytime high
29°
4th warmest
Overnight low
17°
5th coldest
Rainfall
66 mm
7.9 wet days
Daylight
11 h 54 min
7:08 AM – 7:00 PM
Cloud cover
44%
4th clearest
Wind
10 km/h
1st windiest
Solar energy
5.56 kWh/m²
Travel score
6.0
out of 10

Pirassununga is human settlement in Brazil.

Air quality
Moderate
PM10 31 µg/m³ · 2012

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 29°C through the month.

A typical September day in Pirassununga reaches about 29°C in the afternoon and slips back to 17°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 34°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)
12916
22916
32916
42916
52916
62916
72916
82916
92916
102916
112916
122917
132917
142917
152917
162917
172917
182917
192917
202917
212917
222917
232917
242917
252917
262917
272917
282917
292917
302917

Pirassununga weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 20°25122.913.23.8
Feb29° / 20°17318.612.84.0
Mar29° / 20°15118.312.24.5
Apr28° / 18°628.811.56.4
May26° / 15°536.2117.6
Jun25° / 14°323.410.78.2
Jul25° / 13°263.410.88.3
Aug27° / 14°253.611.27.8
Sep29° / 17°667.911.96.0
Oct29° / 18°11613.812.54.8
Nov29° / 19°17017.113.14.5
Dec29° / 20°21521.813.34.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% 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 35%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17723
27723
37624
47525
57426
67426
77327
87129
97129
107030
116832
126832
136733
146634
156535
166436
176337
186337
196238
206139
216040
225941
235941
245743
255644
265545
275446
285446
295347
305347

Chance of precipitation in September

Any precipitation

Pirassununga gets around 66 mm of rain over 7.9 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 26% 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 (%)
118
219
319
420
520
621
721
821
922
1022
1122
1223
1323
1424
1524
1625
1726
1826
1927
2028
2129
2230
2331
2432
2533
2634
2735
2835
2936
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 41% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
16127111
26028111
35928121
45828131
55629141
65629141
75430151
85230162
95031172
104931182
114732192
124632192
134433203
144333213
154134223
164035233
173835234
183635244
193536254
203336265
213236276
223036286
232936297
242735308
252635319
2625343110
2724333210
2823323311
2923313412
3022313513

Wind in September

Winds average 10 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 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
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 7:23 AM to 6:54 AM, and sunset from 6:56 PM to 7:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.67:236:56
211.67:226:56
311.67:216:57
411.67:206:57
511.67:196:57
611.77:186:58
711.77:176:58
811.77:166:58
911.77:156:58
1011.77:146:59
1111.87:136:59
1211.87:126:59
1311.87:116:59
1411.87:107:00
1511.97:097:00
1611.97:087:00
1711.97:077:01
1811.97:067:01
1911.97:057:01
2012.07:047:01
2112.07:037:02
2212.07:027:02
2312.07:017:02
2412.07:007:03
2512.16:597:03
2612.16:587:03
2712.16:577:03
2812.16:567:04
2912.26:557:04
3012.26:547:04

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.56 kWh/m².

For context, solar energy here swings from a low near 3.81 kWh/m² to a high of 5.94 kWh/m² in November across the year — September's 5.56 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.4Bright
55.4Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in September

Hazard calendar for Pirassununga

In seasonPeak

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

Pirassununga'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 Pirassununga?

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

6.0
Sightseeing
6th-best month of the year
7.6
Beach & pool
2nd-best month of the year

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

What to pack for Pirassununga in September

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

In September, Pirassununga sees daytime highs around 29°C and nights near 17°C. Pack light clothes. Worth having: sun protection. About 8 days see rain.

light clothessun protection

UV index in Pirassununga 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 Pirassununga peaks around January 20 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 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 20UV 15Jul 11UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May7High
Jun6High
Jul6High
Aug8Very high
Sep9Very high
Oct11Extreme
Nov14Extreme
Dec14Extreme

Air quality in Pirassununga 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 Pirassununga is worst in September — around 32 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (November, 10 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1430 µg/m³Nov 2310 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb12Good
Mar12Good
Apr13Moderate
May15Moderate
Jun15Moderate
Jul16Moderate
Aug23Moderate
Sep32Moderate
Oct16Moderate
Nov10Good
Dec10Good
Location & terrain

Where is Pirassununga?

Pirassununga sits at 22.0°S, 47.4°W, 631 m above sea level, in Brazil. The nearest listed city is Porto Ferreira, 17 km away.

Topography around Pirassununga

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

Within 3 km, the terrain around Pirassununga has only modest variations in elevation — a maximum elevation change of 109 m around an average of 617 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 303 m; within 80 km, large variations in elevation — a maximum elevation change of 1,116 m.

The land around Pirassununga is covered by artificial surfaces (40%), cropland (25%) and trees (23%) within 3 km, cropland (62%) and trees (25%) within 16 km, and cropland (46%) and trees (35%) within 80 km.

3 km
109 m
16 km
303 m
80 km
1,116 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Porto Ferreira 17 km · Leme 21 km · Descalvado 22 km · Santa Cruz das Palmeiras 26 km · Santa Rita do Passa Quatro 32 km · Tambaú 36 km · Araras 40 km · Casa Branca 43 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 Pirassununga (-21.9961°, -47.4258°, elevation 631 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).