Assis weather in September

In September, Assis sees average daytime highs of 29°C and overnight lows near 17°C, with 92 mm of rain across 8.2 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 29°C through the month. The sky is clear or mostly clear about 51% of the time in September, and the air most often feels comfortable.

Daylight stretches from about 11 h 30 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Assis's 4th-clearest and 1st-windiest month. For the whole year in context, see Assis's year-round climate.

Daytime high
29°
7th warmest
Overnight low
17°
5th coldest
Rainfall
92 mm
8.2 wet days
Daylight
11 h 54 min
7:20 AM – 7:12 PM
Cloud cover
45%
4th clearest
Wind
11 km/h
1st windiest
Solar energy
5.32 kWh/m²
Travel score
6.0
out of 10

Assis 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 29°C through the month.

A typical September day in Assis 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 23°C and 35°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

10°20°30°40°151015202530
Avg high (°C)Avg low (°C)
12917
22917
32917
42917
52917
62917
72917
82917
92917
102917
112917
122917
132917
142917
152917
162917
172918
182918
192918
202918
212918
222918
232918
242918
252918
262918
272918
282918
292918
302918

How September really feels in Assis

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.

Assis 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
Jan30° / 21°24821.413.23.6
Feb30° / 21°19718.912.83.7
Mar30° / 21°14116.612.24.3
Apr29° / 19°697.611.56.0
May26° / 16°747.210.97.3
Jun25° / 15°615.810.67.8
Jul25° / 14°424.510.88.0
Aug28° / 15°454.211.27.5
Sep29° / 17°928.211.96.0
Oct30° / 19°13212.912.54.8
Nov30° / 20°14913.913.14.4
Dec30° / 21°19018.813.43.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% 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 37%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17525
27426
37327
47327
57228
67030
76931
86832
96733
106634
116634
126436
136436
146337
156337
166238
176139
186139
196040
205941
215941
225842
235743
245644
255545
265446
275347
285248
295248
305248

Chance of precipitation in September

Any precipitation

Assis gets around 92 mm of rain over 8.2 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 37% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
117
218
319
419
520
621
722
822
923
1023
1124
1224
1325
1426
1526
1627
1727
1828
1929
2029
2130
2231
2332
2433
2534
2635
2736
2836
2937
3037

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 34% of days. Sticky, muggy-or-worse air turns up on roughly 11% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
143361640
242361750
341361850
441351950
540351960
639352060
738342170
837342270
936342370
1035342470
1133342580
1232342680
1331342680
1429352790
1528352890
1627352890
17263529100
18253630100
19243630110
20233530110
21213531120
22203531130
23203431150
24193331160
25183331170
26173231191
27173131201
28163031221
29162931231
30152831241

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 30 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 42 minutes over September. Sunrise moves from 7:35 AM to 7:05 AM, and sunset from 7:08 PM to 7:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:357:08
211.67:347:08
311.67:337:08
411.67:327:08
511.67:317:09
611.67:307:09
711.77:297:09
811.77:287:10
911.77:277:10
1011.77:267:10
1111.87:257:11
1211.87:247:11
1311.87:237:11
1411.87:227:12
1511.87:217:12
1611.97:207:12
1711.97:197:12
1811.97:187:13
1911.97:177:13
2012.07:167:13
2112.07:157:14
2212.07:147:14
2312.07:137:14
2412.17:127:15
2512.17:107:15
2612.17:097:15
2712.17:087:16
2812.17:077:16
2912.27:067:16
3012.27:057:17

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.32 kWh/m².

For context, solar energy here swings from a low near 3.48 kWh/m² to a high of 6.06 kWh/m² in November across the year — September's 5.32 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.3Bright
175.4Bright
185.4Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.4Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in September

Hazard calendar for Assis

In seasonPeak

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

Assis'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 Assis?

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

6.0
Sightseeing
5th-best month of the year
7.5
Beach & pool
2nd-best month of the year

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

What to pack for Assis in September

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

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

light clothesrain gearsun protection

UV index in Assis in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Assis peaks around January 22 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 22UV 15Jul 13UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug7Very high
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec13Extreme

Air quality in Assis 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 Assis is worst in September — around 19 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (November, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1619 µg/m³Nov 237 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb8Good
Mar7Good
Apr8Good
May10Good
Jun9Good
Jul9Good
Aug13Moderate
Sep19Moderate
Oct13Moderate
Nov7Good
Dec7Good
Location & terrain

Where is Assis?

Assis sits at 22.7°S, 50.4°W, 546 m above sea level, in Brazil. The nearest listed city is Cândido Mota, 10 km away.

Topography around Assis

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

Within 3 km, the terrain around Assis has only modest variations in elevation — a maximum elevation change of 109 m around an average of 559 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 219 m; within 80 km, significant variations in elevation — a maximum elevation change of 471 m.

The land around Assis is covered by artificial surfaces (54%) within 3 km, cropland (69%) within 16 km, and cropland (62%) within 80 km.

3 km
109 m
16 km
219 m
80 km
471 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Cândido Mota 10 km · Palmital 24 km · Paraguaçu Paulista 32 km · Andirá 47 km · Bandeirantes 50 km · Cambará 55 km · Cornélio Procópio 63 km · Ourinhos 66 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 Assis (-22.6617°, -50.4122°, elevation 546 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).