São João do Rio do Peixe weather in September

In September, São João do Rio do Peixe sees average daytime highs of 35°C and overnight lows near 22°C, with 1 mm of rain across 0.2 wet days and about 12 hours of daylight. It is the 4th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 70% of the time in September, and the air most often feels humid.

Daylight stretches from about 11 h 54 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is São João do Rio do Peixe's 1st-clearest and 2nd-windiest month. For the whole year in context, see São João do Rio do Peixe's year-round climate.

Daytime high
35°
4th warmest
Overnight low
22°
4th coldest
Rainfall
1 mm
0.2 wet days
Daylight
12 hours
5:29 AM – 5:27 PM
Cloud cover
29%
1st clearest
Wind
15 km/h
2nd windiest
Solar energy
6.89 kWh/m²
Travel score
3.4
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 35°C through the month.

A typical September day in São João do Rio do Peixe reaches about 35°C in the afternoon and slips back to 22°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 34°C and 36°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13422
23422
33422
43422
53422
63422
73422
83422
93522
103522
113522
123522
133522
143522
153522
163522
173522
183522
193522
203522
213522
223523
233523
243523
253523
263523
273523
283523
293523
303523

How September really feels in São João do Rio do Peixe

Once humidity and wind are folded in, September averages 30 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
30
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.

São João do Rio do Peixe weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan34° / 24°9211.212.33.0
Feb33° / 24°10212.712.23.1
Mar32° / 23°14016.7123.3
Apr32° / 23°9313.211.93.7
May32° / 23°50711.74.3
Jun32° / 22°18311.64.9
Jul32° / 21°71.611.64.8
Aug33° / 21°40.511.84.2
Sep35° / 22°10.2123.4
Oct36° / 23°60.812.12.9
Nov36° / 24°40.812.32.8
Dec35° / 24°223.812.42.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 70% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 14%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18317
28317
38317
48317
58317
68317
78317
88317
98317
108317
118317
128317
138317
148416
158416
168515
178614
188713
198713
208911
218911
228911
239010
249010
259010
26919
27919
289010
299010
309010

Chance of precipitation in September

Any precipitation

São João do Rio do Peixe gets around 1 mm of rain over 0.2 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 1% and peaks near 1% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
11
21
31
41
51
61
71
81
91
101
111
121
131
141
151
161
171
181
191
201
211
221
231
241
251
261
271
281
291
301

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 49% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1348472
2348472
3348472
4347472
5347472
6347473
7346473
8346483
9446483
10445483
11445493
12444493
13444493
14443503
15443503
16443503
17443503
18443503
19443503
20443503
21443503
22444503
23444503
24444493
25444493
26444493
27445483
28445483
29445484
30345474

Wind in September

Winds average 15 km/h in September.

Across September, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over September. Sunrise moves from 5:37 AM to 5:22 AM, and sunset from 5:30 PM to 5:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:375:30
211.95:375:29
311.95:365:29
411.95:365:29
511.95:355:29
611.95:355:29
711.95:345:29
811.95:345:28
911.95:335:28
1011.95:335:28
1111.95:325:28
1211.95:315:28
1311.95:315:28
1412.05:305:27
1512.05:305:27
1612.05:295:27
1712.05:295:27
1812.05:285:27
1912.05:285:26
2012.05:275:26
2112.05:265:26
2212.05:265:26
2312.05:255:26
2412.05:255:26
2512.05:245:25
2612.05:245:25
2712.05:235:25
2812.05:235:25
2912.05:225:25
3012.15:225:25

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.89 kWh/m².

For context, solar energy here swings from a low near 4.83 kWh/m² to a high of 7.19 kWh/m² in October across the year — September's 6.89 kWh/m² sits near the top of that range.

02468151015202530
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.6Intense
46.6Intense
56.6Intense
66.6Intense
76.6Intense
86.7Intense
96.7Intense
106.7Intense
116.7Intense
126.8Intense
136.8Intense
146.8Intense
156.8Intense
166.9Intense
176.9Intense
187.0Intense
197.0Intense
207.0Intense
217.0Intense
227.1Intense
237.1Intense
247.1Intense
257.2Intense
267.2Intense
277.2Intense
287.2Intense
297.2Intense
307.2Intense
Planning a trip in September

Hazard calendar for São João do Rio do Peixe

In seasonPeak

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

São João do Rio do Peixe's rainy season runs January–April, 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 São João do Rio do Peixe?

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

3.4
Sightseeing
6th-best month of the year
7.2
Beach & pool
4th-best month of the year

September is a weaker month for outdoor sightseeing in São João do Rio do Peixe. The water and warmth also suit a beach or pool day.

What to pack for São João do Rio do Peixe in September

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

In September, São João do Rio do Peixe sees daytime highs around 35°C and nights near 22°C. Pack light clothes and sun protection.

light clothessun protection

UV index in São João do Rio do Peixe in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in São João do Rio do Peixe peaks around March 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 16 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 13UV 15Jul 16UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Very high
Sep13Extreme
Oct12Extreme
Nov12Extreme
Dec12Extreme

Air quality in São João do Rio do Peixe 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 São João do Rio do Peixe is worst in November — around 18 µg/m³ PM2.5 (moderate), about 4.7× the cleanest month (July, 4 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateNov 1418 µg/m³Jul 164 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb9Good
Mar9Good
Apr9Good
May7Good
Jun5Good
Jul4Good
Aug5Good
Sep9Good
Oct15Moderate
Nov18Moderate
Dec13Moderate
Location & terrain

Where is São João do Rio do Peixe?

São João do Rio do Peixe sits at 6.7°S, 38.4°W, 247 m above sea level, in Brazil. The nearest listed city is Cajazeiras, 21 km away.

Topography around São João do Rio do Peixe

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São João do Rio do Peixe.

Within 3 km, the terrain around São João do Rio do Peixe has only modest variations in elevation — a maximum elevation change of 48 m around an average of 248 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 306 m; within 80 km, large variations in elevation — a maximum elevation change of 750 m.

The land around São João do Rio do Peixe is covered by grassland (36%), cropland (31%) and shrubs (25%) within 3 km, shrubs (44%) and grassland (34%) within 16 km, and shrubs (60%) and grassland (27%) within 80 km.

3 km
48 m
16 km
306 m
80 km
750 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Cajazeiras 21 km · Sousa 25 km · São José de Piranhas 44 km · Lavras da Mangabeira 57 km · São Miguel 58 km · Icó 58 km · Barro 62 km · Aurora 62 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 São João do Rio do Peixe (-6.7292°, -38.4489°, elevation 247 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).