Rosário Oeste weather in May

In May, Rosário Oeste sees average daytime highs of 30°C and overnight lows near 20°C, with 31 mm of rain across 5.3 wet days and about 11.3 hours of daylight. It is the 12th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 44% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 11 h 30 min at the start of May to 11 h 12 min by month's end. Set against the rest of the year, May is Rosário Oeste's 5th-clearest and 5th-windiest month. For the whole year in context, see Rosário Oeste's year-round climate.

Daytime high
30°
12th warmest
Overnight low
20°
4th coldest
Rainfall
31 mm
5.3 wet days
Daylight
11 h 18 min
7:03 AM – 6:21 PM
Cloud cover
51%
5th clearest
Wind
7 km/h
5th windiest
Solar energy
4.63 kWh/m²
Travel score
5.5
out of 10

Rosário Oeste 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

Day-to-day highs hold fairly steady near 30°C through the month.

A typical May day in Rosário Oeste reaches about 30°C in the afternoon and slips back to 20°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 33°C. Set against its neighbours, May runs about 1°C cooler than April and on par with June.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13121
23121
33121
43121
53121
63121
73121
83021
93021
103021
113021
123021
133021
143021
153020
163020
173020
183020
193020
203020
213020
223020
233020
243020
253020
263020
273020
283020
293020
303020
313020

How May really feels in Rosário Oeste

Once humidity and wind are folded in, May averages 15 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
15
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Rosário Oeste weather by month

How May compares with the rest of the year at a glance. May is the 12th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°24425.612.82.9
Feb31° / 23°22124.612.52.8
Mar31° / 23°20424.812.12.9
Apr31° / 22°9715.711.73.9
May30° / 20°315.311.35.5
Jun30° / 19°91.311.16.1
Jul31° / 18°50.611.26.1
Aug33° / 20°101.511.54.6
Sep34° / 22°427.411.93.4
Oct33° / 23°11716.712.32.9
Nov32° / 23°1702112.72.9
Dec31° / 23°20524.312.92.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15941
25941
35941
45941
55842
65842
75743
85743
95644
105644
115545
125545
135545
145545
155644
165644
175644
185743
195743
205842
215941
226040
236040
246139
256238
266337
276436
286535
296535
306733
316832

Chance of precipitation in May

Any precipitation

Rosário Oeste gets around 31 mm of rain over 5.3 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 18% and peaks near 24% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
124
223
322
421
521
620
720
820
920
1020
1119
1219
1319
1419
1519
1619
1719
1818
1918
2017
2117
2216
2315
2415
2514
2614
2713
2813
2912
3011
3111

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 39% of days. Sticky, muggy-or-worse air turns up on roughly 77% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
114725594
214826574
314828563
425929523
525930513
6251031502
7251032492
8251133472
9251134462
10251235451
11251336441
12241337421
13241437411
14241438401
15241539400
16241639380
17251639370
18251740360
19251840350
20251840340
21251941330
22261941320
23262041310
24262042300
25272142290
26272242280
27272343260
28272343250
29272443240
30272643220
31272743210

Wind in May

Winds average 7 km/h in May.

Across May, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 30 min at the start of May to 11 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over May. Sunrise moves from 6:59 AM to 7:07 AM, and sunset from 6:27 PM to 6:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.56:596:27
211.56:596:27
311.56:596:26
411.46:596:26
511.47:006:25
611.47:006:25
711.47:006:24
811.47:006:24
911.47:016:24
1011.47:016:23
1111.47:016:23
1211.47:016:23
1311.37:026:22
1411.37:026:22
1511.37:026:22
1611.37:036:21
1711.37:036:21
1811.37:036:21
1911.37:036:21
2011.37:046:20
2111.37:046:20
2211.37:046:20
2311.37:056:20
2411.27:056:20
2511.27:056:19
2611.27:066:19
2711.27:066:19
2811.27:066:19
2911.27:076:19
3011.27:076:19
3111.27:076:19

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.63 kWh/m².

For context, solar energy here swings from a low near 4.49 kWh/m² to a high of 6 kWh/m² in October across the year — May's 4.63 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.7Bright
114.7Bright
124.7Bright
134.7Bright
144.6Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.6Bright
204.5Bright
214.5Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
314.5Bright
Planning a trip in May

Hazard calendar for Rosário Oeste

In seasonPeak

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

Rosário Oeste's monsoon runs October–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 Rosário Oeste?

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

5.5
Sightseeing
3rd-best month of the year
7.6
Beach & pool
4th-best month of the year

May is a reasonable time to visit Rosário Oeste for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Rosário Oeste in May

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

In May, Rosário Oeste sees daytime highs around 30°C and nights near 20°C. Pack light clothes. Worth having: sun protection. About 5 days see rain.

light clothessun protection

UV index in Rosário Oeste in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rosário Oeste peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 14 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeJan 21UV 15Sep 14UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug9Very high
Sep5High
Oct11Extreme
Nov13Extreme
Dec13Extreme

Air quality in Rosário Oeste 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 Rosário Oeste is worst in September — around 64 µg/m³ PM2.5 (unhealthy), about 8.8× the cleanest month (May, 7 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateGoodSep 1559 µg/m³May 217 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb9Good
Mar8Good
Apr8Good
May7Good
Jun7Good
Jul10Good
Aug26Moderate
Sep64Unhealthy
Oct20Moderate
Nov11Good
Dec10Good
Location & terrain

Where is Rosário Oeste?

Rosário Oeste sits at 14.8°S, 56.4°W, 201 m above sea level, in Brazil. The nearest listed city is Nobres, 17 km away.

Topography around Rosário Oeste

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

Within 3 km, the terrain around Rosário Oeste has only modest variations in elevation — a maximum elevation change of 116 m around an average of 198 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 423 m; within 80 km, large variations in elevation — a maximum elevation change of 740 m.

The land around Rosário Oeste is covered by trees (48%) and grassland (37%) within 3 km, trees (43%) and grassland (42%) within 16 km, and trees (44%) and grassland (37%) within 80 km.

3 km
116 m
16 km
423 m
80 km
740 m
treesshrubsgrasslandcroplandartificial surfaceswater
May weather nearby: Nobres 17 km · Diamantino 48 km · Barra do Bugres 85 km · Cuiabá 92 km · Nova Olímpia 93 km · Várzea Grande 96 km · Chapada dos Guimarães 101 km · Tangará da Serra 116 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 Rosário Oeste (-14.8361°, -56.4275°, elevation 201 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).