Vassouras weather in May

In May, Vassouras sees average daytime highs of 25°C and overnight lows near 16°C, with 53 mm of rain across 9.3 wet days and about 10.9 hours of daylight. It is the 10th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 24°C by the end. The sky is clear or mostly clear about 30% of the time in May, and the air most often feels humid.

Daylight stretches from about 11 h 12 min at the start of May to 10 h 42 min by month's end. Set against the rest of the year, May is Vassouras's 4th-clearest and 11th-windiest month. For the whole year in context, see Vassouras's year-round climate.

Daytime high
25°
10th warmest
Overnight low
16°
4th coldest
Rainfall
53 mm
9.3 wet days
Daylight
10 h 54 min
7:23 AM – 6:19 PM
Cloud cover
56%
4th clearest
Wind
6 km/h
11th windiest
Solar energy
3.53 kWh/m²
Travel score
7.0
out of 10

Vassouras is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 26°C in the first days to 24°C by the end.

A typical May day in Vassouras reaches about 25°C in the afternoon and slips back to 16°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 29°C. Set against its neighbours, May runs about 2°C cooler than April and on par with June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12617
22617
32617
42617
52617
62617
72617
82517
92517
102517
112517
122516
132516
142516
152516
162516
172516
182516
192516
202516
212516
222516
232516
242416
252416
262416
272416
282416
292416
302416
312416

How May really feels in Vassouras

Once humidity and wind are folded in, May 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

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

Vassouras weather by month

How May compares with the rest of the year at a glance. May is the 10th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 21°2822213.23.7
Feb30° / 21°20017.612.83.9
Mar29° / 20°19520.312.24.2
Apr27° / 19°8912.511.56.0
May25° / 16°539.310.97.0
Jun25° / 15°285.510.77.8
Jul24° / 15°295.310.87.9
Aug25° / 15°275.511.27.7
Sep26° / 17°661011.96.6
Oct27° / 18°11214.112.55.7
Nov27° / 19°20219.313.14.8
Dec29° / 20°24922.213.34.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 22% of May, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25644
35644
45644
55644
65644
75545
85446
95446
105347
115248
125149
135050
145050
154951
164951
174951
185050
194951
205050
215050
225149
235050
245149
255248
265149
275149
285248
295248
305248
315347

Chance of precipitation in May

Any precipitation

Vassouras gets around 53 mm of rain over 9.3 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 30% and peaks near 33% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
133
233
333
433
532
632
732
832
932
1032
1132
1232
1332
1432
1531
1631
1731
1831
1930
2030
2129
2229
2329
2428
2528
2627
2727
2827
2926
3026
3126

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the humid band about 50% of days. Sticky, muggy-or-worse air turns up on roughly 20% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
111348371
211448361
321549341
421649321
521749301
621850291
731950281
832050271
932150261
1032250251
1132350241
1232450231
1332450221
1442550210
1542650200
1642750190
1742850180
1842851170
1942951160
2042952150
2143052140
2253052130
2353152120
2453251120
2563251110
2663351100
2773450100
287345090
297345090
308344990
318344980

Wind in May

Winds average 6 km/h in May.

Across May, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 12 min at the start of May to 10 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over May. Sunrise moves from 7:16 AM to 7:30 AM, and sunset from 6:27 PM to 6:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.27:166:27
211.27:176:27
311.17:176:26
411.17:186:25
511.17:186:25
611.17:186:24
711.17:196:23
811.17:196:23
911.07:206:22
1011.07:206:22
1111.07:216:21
1211.07:216:21
1311.07:226:20
1411.07:226:20
1510.97:236:19
1610.97:236:19
1710.97:236:18
1810.97:246:18
1910.97:246:18
2010.97:256:17
2110.97:256:17
2210.87:266:16
2310.87:266:16
2410.87:276:16
2510.87:276:16
2610.87:286:15
2710.87:286:15
2810.87:296:15
2910.87:296:15
3010.87:296:14
3110.77:306:14

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.53 kWh/m².

For context, solar energy here swings from a low near 3.36 kWh/m² to a high of 5.8 kWh/m² in February across the year — May's 3.53 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.9Moderate
23.9Moderate
33.9Moderate
43.9Moderate
53.8Moderate
63.8Moderate
73.8Moderate
83.7Moderate
93.7Moderate
103.6Moderate
113.6Moderate
123.6Moderate
133.5Moderate
143.5Moderate
153.5Moderate
163.5Moderate
173.4Moderate
183.4Moderate
193.4Moderate
203.4Moderate
213.4Moderate
223.4Moderate
233.3Moderate
243.3Moderate
253.3Moderate
263.3Moderate
273.3Moderate
283.3Moderate
293.3Moderate
303.3Moderate
313.3Moderate
Planning a trip in May

Hazard calendar for Vassouras

In seasonPeak

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

Vassouras's monsoon runs November–March, when most of the year's rain falls.

Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Vassouras?

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

7.0
Sightseeing
4th-best month of the year
6.3
Beach & pool
5th-best month of the year

May is one of the better times to visit Vassouras for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Vassouras in May

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

In May, Vassouras sees daytime highs around 25°C and nights near 16°C. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

UV index in Vassouras in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Vassouras peaks around January 20 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 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 20UV 15Jul 12UV 6
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug8Very high
Sep7High
Oct12Extreme
Nov14Extreme
Dec14Extreme

Air quality in Vassouras in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Vassouras is worst in July — around 38 µg/m³ PM2.5 (poor), about 2.0× the cleanest month (December, 19 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateModerateJul 1237 µg/m³Dec 2319 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb19Moderate
Mar21Moderate
Apr24Moderate
May31Moderate
Jun36Poor
Jul38Poor
Aug32Moderate
Sep37Poor
Oct24Moderate
Nov20Moderate
Dec19Moderate
Location & terrain

Where is Vassouras?

Vassouras sits at 22.4°S, 43.7°W, 424 m above sea level, in Brazil. The nearest listed city is Mendes, 15 km away.

Topography around Vassouras

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

Within 3 km, the terrain around Vassouras has significant variations in elevation — a maximum elevation change of 386 m around an average of 500 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 944 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,224 m.

The land around Vassouras is covered by grassland (50%) and trees (40%) within 3 km, trees (50%) and grassland (49%) within 16 km, and trees (47%) and grassland (39%) within 80 km.

3 km
386 m
16 km
944 m
80 km
2,224 m
treesgrasslandartificial surfaceswatermangroves
May weather nearby: Mendes 15 km · Valença 18 km · Barra do Piraí 18 km · Miguel Pereira 21 km · Paracambi 23 km · Paty do Alferes 25 km · Japeri 27 km · Piraí 35 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 Vassouras (-22.4039°, -43.6625°, elevation 424 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).