Santo Anastácio weather in September

In September, Santo Anastácio sees average daytime highs of 30°C and overnight lows near 19°C, with 85 mm of rain across 8.1 wet days and about 11.9 hours of daylight. It is the 7th-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 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 Santo Anastácio's 4th-clearest and 1st-windiest month. For the whole year in context, see Santo Anastácio's year-round climate.

Daytime high
30°
7th warmest
Overnight low
19°
5th coldest
Rainfall
85 mm
8.1 wet days
Daylight
11 h 54 min
7:25 AM – 7:17 PM
Cloud cover
43%
4th clearest
Wind
11 km/h
1st windiest
Solar energy
5.49 kWh/m²
Travel score
5.2
out of 10

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 Santo Anastácio reaches about 30°C in the afternoon and slips back to 19°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 36°C. Set against its neighbours, September runs about 2°C warmer than August and on par with October.

10°20°30°40°151015202530
Avg high (°C)Avg low (°C)
13018
23018
33018
43018
53018
63119
73119
83119
93119
103119
113119
123119
133119
143119
153119
163019
173019
183019
193019
203019
213019
223019
233019
243019
253019
263019
273019
283019
293019
303019

How September really feels in Santo Anastácio

Once humidity and wind are folded in, September averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Santo Anastácio weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 22°22021.713.23.3
Feb31° / 22°17318.512.83.5
Mar31° / 22°13116.212.24.1
Apr30° / 20°638.211.55.6
May27° / 17°676.9117.2
Jun26° / 16°465.210.77.7
Jul26° / 16°283.610.88.0
Aug29° / 17°333.811.26.8
Sep30° / 19°858.111.95.2
Oct31° / 20°13113.312.54.2
Nov31° / 21°1361413.14.0
Dec31° / 22°17618.813.33.5

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 11% of September, with mostly cloudy or overcast conditions the remaining 36%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17723
27624
37525
47525
57327
67228
77129
86931
96931
106832
116634
126634
136634
146535
156535
166337
176337
186238
196238
206139
216139
226040
235842
245842
255743
265545
275545
285347
295347
305248

Chance of precipitation in September

Any precipitation

Santo Anastácio gets around 85 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 27% and peaks near 38% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
117
218
318
419
520
620
721
821
922
1022
1123
1223
1324
1424
1525
1625
1726
1827
1928
2029
2130
2231
2332
2433
2534
2635
2736
2837
2937
3038

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 33% of days. Sticky, muggy-or-worse air turns up on roughly 18% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
152271650
251271660
351261670
449261770
548261780
647261890
7462519100
8452519100
9432520111
10422521121
11402522121
12382622131
13362623141
14352723141
15332724151
16322824161
17302825161
18292925171
19272925181
20262925191
21252925201
22232925211
23222925231
24212825241
25202825252
26192725272
27192724283
28182624303
29172524313
30172424324

Wind in September

Winds average 11 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 11 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 7:40 AM to 7:11 AM, and sunset from 7:13 PM to 7:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.67:407:13
211.67:397:13
311.67:387:14
411.67:377:14
511.67:367:14
611.77:357:14
711.77:347:15
811.77:337:15
911.77:327:15
1011.77:317:16
1111.87:307:16
1211.87:297:16
1311.87:287:16
1411.87:277:17
1511.97:267:17
1611.97:257:17
1711.97:247:17
1811.97:237:18
1911.97:227:18
2012.07:217:18
2112.07:207:19
2212.07:197:19
2312.07:187:19
2412.07:177:19
2512.17:167:20
2612.17:157:20
2712.17:147:20
2812.17:137:21
2912.27:127:21
3012.27:117:21

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.49 kWh/m².

For context, solar energy here swings from a low near 3.62 kWh/m² to a high of 6.23 kWh/m² in November across the year — September's 5.49 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.4Bright
85.4Bright
95.4Bright
105.4Bright
115.4Bright
125.4Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in September

Hazard calendar for Santo Anastácio

In seasonPeak

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

Santo Anastácio's rainy season runs October–March, 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 Santo Anastácio?

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

5.2
Sightseeing
6th-best month of the year
7.3
Beach & pool
4th-best month of the year

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

What to pack for Santo Anastácio in September

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

In September, Santo Anastácio sees daytime highs around 30°C and nights near 19°C. Pack light clothes. Worth having: rain gear and sun protection. About 8 days see rain.

light clothesrain gearsun protection

UV index in Santo Anastácio in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Santo Anastácio peaks around January 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 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 19UV 15Jul 13UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May7Very high
Jun6High
Jul6High
Aug7Very high
Sep7Very high
Oct11Extreme
Nov12Extreme
Dec14Extreme

Air quality in Santo Anastácio 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 Santo Anastácio is worst in September — around 19 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (March, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1618 µg/m³Mar 166 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar6Good
Apr7Good
May8Good
Jun7Good
Jul7Good
Aug12Good
Sep19Moderate
Oct12Moderate
Nov6Good
Dec6Good
Location & terrain

Where is Santo Anastácio?

Santo Anastácio sits at 22.0°S, 51.7°W, 458 m above sea level, in Brazil. The nearest listed city is Álvares Machado, 22 km away.

Topography around Santo Anastácio

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

Within 3 km, the terrain around Santo Anastácio has only modest variations in elevation — a maximum elevation change of 112 m around an average of 422 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 189 m; within 80 km, significant variations in elevation — a maximum elevation change of 316 m.

The land around Santo Anastácio is covered by grassland (59%) within 3 km, grassland (61%) and cropland (29%) within 16 km, and grassland (48%) and cropland (35%) within 80 km.

3 km
112 m
16 km
189 m
80 km
316 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Álvares Machado 22 km · Presidente Venceslau 23 km · Presidente Prudente 32 km · Pirapozinho 37 km · Mirante do Paranapanema 44 km · Regente Feijó 45 km · Martinópolis 53 km · Presidente Epitácio 53 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 Santo Anastácio (-21.9758°, -51.6514°, elevation 458 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).