Guararema weather in September

In September, Guararema sees average daytime highs of 24°C and overnight lows near 15°C, with 85 mm of rain across 10.8 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 24°C through the month. The sky is clear or mostly clear about 32% 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 Guararema's 6th-clearest and 1st-windiest month. For the whole year in context, see Guararema's year-round climate.

Daytime high
24°
8th warmest
Overnight low
15°
5th coldest
Rainfall
85 mm
10.8 wet days
Daylight
11 h 54 min
7:02 AM – 6:54 PM
Cloud cover
61%
6th clearest
Wind
8 km/h
1st windiest
Solar energy
4.57 kWh/m²
Travel score
6.8
out of 10

Guararema 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 24°C through the month.

A typical September day in Guararema reaches about 24°C in the afternoon and slips back to 15°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 30°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12414
22414
32414
42414
52414
62414
72414
82514
92515
102515
112515
122515
132515
142515
152515
162415
172415
182415
192415
202415
212415
222415
232415
242415
252415
262415
272415
282415
292416
302416

Guararema weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 20°25424.713.34.2
Feb28° / 20°19320.712.84.3
Mar27° / 19°16921.512.24.8
Apr26° / 17°721211.56.4
May23° / 15°66910.97.0
Jun23° / 13°445.910.67.5
Jul22° / 12°53610.77.5
Aug23° / 13°42611.27.7
Sep24° / 15°8510.811.96.8
Oct25° / 17°11214.612.55.8
Nov26° / 17°15117.713.15.3
Dec27° / 19°19121.613.44.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% 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 56%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25743
35644
45644
55545
65446
75347
85248
95149
105050
114852
124753
134654
144555
154555
164456
174357
184258
194159
204060
213961
223862
233763
243565
253466
263466
273367
283268
293268
303169

Chance of precipitation in September

Any precipitation

Guararema gets around 85 mm of rain over 10.8 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 35% and peaks near 45% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
125
225
326
427
527
628
729
829
930
1030
1131
1231
1332
1433
1533
1634
1735
1836
1937
2039
2140
2241
2342
2443
2544
2644
2745
2845
2945
3045

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 44% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12352250
22252260
32152270
42151280
52050291
61951291
71851301
81850311
91749321
101649332
111549352
121448362
131348372
141347382
151247393
161246393
171245403
181244413
191243424
201242424
211141435
221140435
231139446
241138447
251037458
261036458
271035469
2810344610
2910334611
309334612

Wind in September

Winds average 8 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

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 7:18 AM to 6:48 AM, and sunset from 6:50 PM to 6:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:186:50
211.57:176:50
311.67:166:50
411.67:156:51
511.67:146:51
611.67:136:51
711.77:126:52
811.77:116:52
911.77:106:52
1011.77:096:53
1111.87:086:53
1211.87:076:53
1311.87:066:53
1411.87:056:54
1511.87:046:54
1611.97:026:54
1711.97:016:55
1811.97:006:55
1911.96:596:55
2012.06:586:56
2112.06:576:56
2212.06:566:56
2312.06:556:57
2412.16:546:57
2512.16:536:57
2612.16:526:58
2712.16:516:58
2812.16:506:58
2912.26:496:59
3012.26:486:59

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.57 kWh/m².

For context, solar energy here swings from a low near 3.26 kWh/m² to a high of 5.59 kWh/m² in December across the year — September's 4.57 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.6Bright
44.6Bright
54.6Bright
64.6Bright
74.6Bright
84.6Bright
94.6Bright
104.6Bright
114.6Bright
124.6Bright
134.6Bright
144.6Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.6Bright
204.6Bright
214.6Bright
224.6Bright
234.6Bright
244.6Bright
254.6Bright
264.6Bright
274.6Bright
284.6Bright
294.6Bright
304.6Bright
Planning a trip in September

Hazard calendar for Guararema

In seasonPeak

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

Guararema's rainy season runs November–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 Guararema?

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

6.8
Sightseeing
5th-best month of the year
5.9
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Guararema for sightseeing.

What to pack for Guararema in September

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

In September, Guararema sees daytime highs around 24°C and nights near 15°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Guararema in September

The nearest coast averages about 21°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 52 km away) is warmest in February at about 27°C and coldest in August near 21°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°25°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr26Warm
May24Refreshing
Jun22Refreshing
Jul21Refreshing
Aug21Refreshing
Sep21Refreshing
Oct22Refreshing
Nov23Refreshing
Dec25Warm

UV index in Guararema in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Guararema peaks around February 9 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeFeb 9UV 15Jul 12UV 5
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar11Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug8Very high
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Guararema 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 Guararema is worst in June — around 32 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 16 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 2132 µg/m³Nov 2316 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb17Moderate
Mar19Moderate
Apr21Moderate
May27Moderate
Jun32Moderate
Jul31Moderate
Aug28Moderate
Sep28Moderate
Oct20Moderate
Nov16Moderate
Dec16Moderate
Location & terrain

Where is Guararema?

Guararema sits at 23.4°S, 46.0°W, 583 m above sea level, in Brazil. The nearest listed city is Jacareí, 14 km away.

Topography around Guararema

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

Within 3 km, the terrain around Guararema has only modest variations in elevation — a maximum elevation change of 196 m around an average of 623 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 569 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,071 m.

The land around Guararema is covered by trees (52%) and grassland (37%) within 3 km, trees (52%) and grassland (41%) within 16 km, and trees (50%) and grassland (22%) within 80 km.

3 km
196 m
16 km
569 m
80 km
2,071 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Jacareí 14 km · Biritiba Mirim 18 km · Mogi das Cruzes 20 km · Santa Isabel 22 km · Salesópolis 23 km · Bairro da Penha 29 km · Bairro Parque Nossa Senhora do Carmo 29 km · Arujá 29 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 Guararema (-23.415°, -46.035°, elevation 583 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).