Silva Jardim weather in September

In September, Silva Jardim sees average daytime highs of 26°C and overnight lows near 19°C, with 81 mm of rain across 10.7 wet days and about 11.9 hours of daylight. It is the 9th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 39% of the time in September, and the air most often feels muggy.

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 Silva Jardim's 6th-clearest and 2nd-windiest month. For the whole year in context, see Silva Jardim's year-round climate.

Daytime high
26°
9th warmest
Overnight low
19°
4th coldest
Rainfall
81 mm
10.7 wet days
Daylight
11 h 54 min
6:48 AM – 6:40 PM
Cloud cover
54%
6th clearest
Wind
10 km/h
2nd windiest
Solar energy
4.81 kWh/m²
Travel score
6.7
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical September day in Silva Jardim reaches about 26°C in the afternoon and slips back to 19°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 30°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12618
22618
32618
42619
52619
62619
72619
82619
92619
102619
112619
122619
132619
142619
152619
162619
172619
182619
192619
202619
212619
222619
232619
242619
252619
262619
272619
282619
292619
302619

How September really feels in Silva Jardim

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.

Silva Jardim weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°23718.713.24.0
Feb30° / 23°17314.912.84.2
Mar29° / 23°21120.112.24.2
Apr28° / 21°11014.311.55.7
May26° / 19°8311.710.96.6
Jun25° / 18°467.210.67.5
Jul25° / 18°447.610.87.6
Aug25° / 18°447.911.27.5
Sep26° / 19°8110.711.96.7
Oct26° / 20°10812.512.56.1
Nov27° / 21°2051813.15.1
Dec29° / 23°24319.813.44.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% 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 49%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16535
26535
36436
46436
56337
66238
76238
86040
95941
105743
115545
125446
135446
145248
155149
164951
174852
184753
194654
204456
214357
224258
234258
244159
254159
264060
274060
283961
293961
303961

Chance of precipitation in September

Any precipitation

Silva Jardim gets around 81 mm of rain over 10.7 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 43% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
127
227
327
428
528
628
729
829
930
1030
1131
1231
1332
1432
1533
1634
1735
1836
1937
2038
2139
2240
2341
2441
2542
2642
2742
2843
2943
3043

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 44% of days. Sticky, muggy-or-worse air turns up on roughly 49% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
111246401
211246401
311246401
411246401
511246411
611245411
711245411
811245421
911145421
1011145421
1111144431
1201144442
1301043442
1401042453
1501041463
1601040464
170939474
180938475
191937485
201936486
211936487
221935477
231934478
241933479
2519334710
2619324611
2719324612
2819314613
2919314513
3019314514

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 10 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
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

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 7:03 AM to 6:33 AM, and sunset from 6:35 PM to 6:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:036:35
211.67:026:36
311.67:016:36
411.67:006:36
511.66:596:37
611.66:586:37
711.76:576:37
811.76:566:38
911.76:556:38
1011.76:546:38
1111.86:536:39
1211.86:526:39
1311.86:516:39
1411.86:506:39
1511.86:496:40
1611.96:486:40
1711.96:476:40
1811.96:466:41
1911.96:456:41
2012.06:446:41
2112.06:436:42
2212.06:426:42
2312.06:406:42
2412.16:396:42
2512.16:386:43
2612.16:376:43
2712.16:366:43
2812.16:356:44
2912.26:346:44
3012.26:336:44

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.81 kWh/m².

For context, solar energy here swings from a low near 3.47 kWh/m² to a high of 6.16 kWh/m² in February across the year — September's 4.81 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
305.0Bright
Planning a trip in September

Hazard calendar for Silva Jardim

In seasonPeak

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

Silva Jardim's rainy season runs November–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 Silva Jardim?

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

6.7
Sightseeing
4th-best month of the year
6.3
Beach & pool
4th-best month of the year

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

What to pack for Silva Jardim in September

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

In September, Silva Jardim sees daytime highs around 26°C and nights near 19°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Silva Jardim in September

The nearest coast averages about 22°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 53 km away) is warmest in March at about 26°C and coldest in September near 22°C.

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

20°22°24°26°28°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan25Warm
Feb25Warm
Mar26Warm
Apr25Warm
May24Refreshing
Jun23Refreshing
Jul22Refreshing
Aug22Refreshing
Sep22Refreshing
Oct22Refreshing
Nov23Refreshing
Dec24Warm

UV index in Silva Jardim 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 Silva Jardim peaks around January 14 at about 14 (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 highExtremeJan 14UV 14Jul 12UV 5
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5Moderate
Aug8Very high
Sep7High
Oct12Extreme
Nov13Extreme
Dec14Extreme

Air quality in Silva Jardim 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 Silva Jardim is worst in September — around 19 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (March, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1518 µg/m³Mar 1110 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar10Good
Apr12Good
May15Moderate
Jun16Moderate
Jul15Moderate
Aug15Moderate
Sep19Moderate
Oct13Moderate
Nov11Good
Dec10Good
Location & terrain

Where is Silva Jardim?

Silva Jardim sits at 22.7°S, 42.4°W, 19 m above sea level, in Brazil. The nearest listed city is Rio Bonito, 23 km away.

Topography around Silva Jardim

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

Within 3 km, the terrain around Silva Jardim has only modest variations in elevation — a maximum elevation change of 150 m around an average of 31 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 580 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,252 m.

The land around Silva Jardim is covered by grassland (62%) and trees (31%) within 3 km, grassland (54%) and trees (39%) within 16 km, and trees (38%), water (35%) and grassland (23%) within 80 km.

3 km
150 m
16 km
580 m
80 km
2,252 m
treesgrasslandartificial surfaceswaterwetland
September weather nearby: Rio Bonito 23 km · Araruama 25 km · Iguaba Grande 27 km · Casimiro de Abreu 27 km · Saquarema 29 km · Cachoeiras de Macacu 34 km · Tanguá 34 km · São Pedro da Aldeia 36 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 Silva Jardim (-22.6508°, -42.3917°, elevation 19 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).