Rio Claro weather in May

In May, Rio Claro sees average daytime highs of 25°C and overnight lows near 15°C, with 57 mm of rain across 6.4 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 27°C in the first days to 24°C by the end. The sky is clear or mostly clear about 46% of the time in May, and the air most often feels comfortable.

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 Rio Claro's 6th-clearest and 7th-windiest month. For the whole year in context, see Rio Claro's year-round climate.

Daytime high
25°
10th warmest
Overnight low
15°
4th coldest
Rainfall
57 mm
6.4 wet days
Daylight
10 h 54 min
7:39 AM – 6:34 PM
Cloud cover
48%
6th clearest
Wind
8 km/h
7th windiest
Solar energy
3.98 kWh/m²
Travel score
7.5
out of 10

Rio Claro is human settlement in Brazil.

Air quality
Elevated
PM10 46 µg/m³ · 2016

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 27°C in the first days to 24°C by the end.

A typical May day in Rio Claro reaches about 25°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 21°C and 29°C. Set against its neighbours, May runs about 3°C cooler than April and on par with June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12716
22716
32716
42616
52616
62616
72616
82616
92615
102615
112615
122615
132515
142515
152515
162515
172515
182515
192515
202515
212515
222514
232514
242514
252514
262414
272414
282414
292414
302414
312414

Rio Claro 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
Jan29° / 20°29023.313.23.7
Feb30° / 20°21419.412.83.8
Mar29° / 20°17318.512.24.5
Apr28° / 18°688.511.56.4
May25° / 15°576.410.97.5
Jun25° / 14°394.510.78.1
Jul25° / 13°353.910.88.2
Aug27° / 14°324.111.27.8
Sep28° / 16°727.911.96.2
Oct29° / 18°1281412.54.9
Nov29° / 19°18416.413.14.6
Dec29° / 20°23021.413.33.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 14% of May, with mostly cloudy or overcast conditions the remaining 40%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16634
26634
36535
46535
56436
66238
76238
86040
96040
105941
115842
125743
135743
145743
155743
165743
175743
185842
195842
205842
215941
225941
236040
246040
256139
266238
276238
286238
296238
306238
316337

Chance of precipitation in May

Any precipitation

Rio Claro gets around 57 mm of rain over 6.4 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 21% and peaks near 24% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
118
218
317
417
517
617
717
818
918
1019
1119
1220
1320
1421
1521
1622
1723
1823
1924
2024
2124
2224
2324
2424
2524
2624
2724
2824
2923
3023
3122

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the comfortable band about 40% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
115373711
216383610
31738369
41939357
52039347
62140346
72140345
82240335
92240335
102341324
112341324
122341324
132441314
142442313
152442313
162442313
172542313
182542303
192542303
202641303
212641303
222741293
232841293
242840292
252940292
262940292
273039292
283039282
293139282
303139282
313140272

Wind in May

Winds average 8 km/h in May.

Across May, 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.

0246810151015202531
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
318calm

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 7:32 AM to 7:45 AM, and sunset from 6:43 PM to 6:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.27:326:43
211.27:326:42
311.17:336:42
411.17:336:41
511.17:346:40
611.17:346:40
711.17:356:39
811.17:356:38
911.07:356:38
1011.07:366:37
1111.07:366:37
1211.07:376:36
1311.07:376:36
1411.07:386:35
1510.97:386:35
1610.97:396:34
1710.97:396:34
1810.97:406:34
1910.97:406:33
2010.97:406:33
2110.97:416:32
2210.87:416:32
2310.87:426:32
2410.87:426:31
2510.87:436:31
2610.87:436:31
2710.87:446:31
2810.87:446:30
2910.87:456:30
3010.87:456:30
3110.77:456:30

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.98 kWh/m².

For context, solar energy here swings from a low near 3.69 kWh/m² to a high of 5.99 kWh/m² in November across the year — May's 3.98 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.4Bright
44.4Bright
54.3Bright
64.3Bright
74.3Bright
84.2Bright
94.2Bright
104.2Bright
114.1Bright
124.1Bright
134.0Bright
144.0Moderate
154.0Moderate
163.9Moderate
173.9Moderate
183.9Moderate
193.8Moderate
203.8Moderate
213.8Moderate
223.8Moderate
233.8Moderate
243.7Moderate
253.7Moderate
263.7Moderate
273.7Moderate
283.7Moderate
293.7Moderate
303.7Moderate
313.7Moderate
Planning a trip in May

Hazard calendar for Rio Claro

In seasonPeak

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

Rio Claro'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 Rio Claro?

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

7.5
Sightseeing
4th-best month of the year
6.9
Beach & pool
6th-best month of the year

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

What to pack for Rio Claro in May

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

In May, Rio Claro sees daytime highs around 25°C and nights near 15°C. Worth packing: light clothes. About 6 days see rain.

light clothes

UV index in Rio Claro 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 Rio Claro peaks around January 19 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 19UV 15Jul 12UV 6
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar12Extreme
Apr10Very high
May7High
Jun6High
Jul6High
Aug8Very high
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Rio Claro 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 Rio Claro is worst in September — around 32 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 16 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateSep 1032 µg/m³Dec 1516 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb17Moderate
Mar19Moderate
Apr22Moderate
May26Moderate
Jun28Moderate
Jul30Moderate
Aug31Moderate
Sep32Moderate
Oct22Moderate
Nov16Moderate
Dec16Moderate
Location & terrain

Where is Rio Claro?

Rio Claro sits at 22.4°S, 47.6°W, 617 m above sea level, in Brazil. The nearest listed city is Santa Gertrudes, 6.0 km away.

Topography around Rio Claro

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

Within 3 km, the terrain around Rio Claro has only modest variations in elevation — a maximum elevation change of 192 m around an average of 609 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 328 m; within 80 km, large variations in elevation — a maximum elevation change of 634 m.

The land around Rio Claro is covered by artificial surfaces (64%) and trees (27%) within 3 km, cropland (42%) and trees (31%) within 16 km, and cropland (46%) and trees (31%) within 80 km.

3 km
192 m
16 km
328 m
80 km
634 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Santa Gertrudes 6.0 km · Cordeirópolis 13 km · Araras 19 km · Iracemápolis 19 km · Limeira 24 km · Charqueada 25 km · Leme 31 km · Itirapina 32 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 Rio Claro (-22.4114°, -47.5614°, elevation 617 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).