Caxias do Sul weather in May

In May, Caxias do Sul sees average daytime highs of 20°C and overnight lows near 11°C, with 140 mm of rain across 10.8 wet days and about 10.6 hours of daylight. It is the 10th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 18°C by the end. The sky is clear or mostly clear about 31% of the time in May, and the air most often feels dry.

Daylight stretches from about 10 h 54 min at the start of May to 10 h 18 min by month's end. Set against the rest of the year, May is Caxias do Sul's 7th-clearest and 8th-windiest month. For the whole year in context, see Caxias do Sul's year-round climate.

Daytime high
20°
10th warmest
Overnight low
11°
4th coldest
Rainfall
140 mm
10.8 wet days
Daylight
10 h 30 min
8:05 AM – 6:37 PM
Cloud cover
60%
7th clearest
Wind
8 km/h
8th windiest
Solar energy
2.88 kWh/m²
Travel score
6.1
out of 10

Caxias do Sul 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 21°C in the first days to 18°C by the end.

A typical May day in Caxias do Sul reaches about 20°C in the afternoon and slips back to 11°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 25°C. Set against its neighbours, May runs about 4°C cooler than April and about 2°C warmer than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12112
22112
32112
42112
52112
62112
72111
82111
92011
102011
112011
122011
132011
142011
152011
162011
172011
182011
191910
201910
211910
221910
231910
241910
251910
261910
271910
28199
29199
30189
31189

Caxias do Sul 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
Jan27° / 18°20818.313.75.2
Feb27° / 17°18417.5135.2
Mar26° / 16°15515.112.25.9
Apr23° / 14°13811.511.36.6
May20° / 11°14010.810.66.1
Jun18° / 13910.710.25.8
Jul18° / 17511.110.35.8
Aug20° / 14010.9116.3
Sep21° / 11°17313.211.86.0
Oct23° / 13°21514.912.76.0
Nov25° / 14°16413.713.56.2
Dec27° / 16°18815.713.85.7

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% 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 54%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24852
34852
44852
54852
64852
74852
84852
94753
104654
114654
124654
134753
144753
154753
164654
174753
184654
194654
204753
214654
224654
234555
244555
254555
264555
274555
284456
294456
304456
314456

Chance of precipitation in May

Any precipitation

Caxias do Sul gets around 140 mm of rain over 10.8 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 35% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
236
336
436
536
636
736
836
936
1036
1136
1236
1335
1435
1535
1635
1735
1834
1934
2034
2134
2233
2333
2433
2533
2633
2733
2833
2933
3033
3133

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 55% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14033225
24232215
34332214
44432204
54632193
64732193
74832182
84932182
95032171
105131171
115231161
125231161
135431150
145431150
155531140
165630140
175730130
185730130
195830120
206029110
216029110
226129100
236228100
24632890
25642790
26652780
27662680
28662680
29672670
30672670
31682570

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.

051015151015202531
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 10 h 54 min at the start of May to 10 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over May. Sunrise moves from 7:55 AM to 8:13 AM, and sunset from 6:49 PM to 6:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.97:556:49
210.97:566:48
310.87:566:47
410.87:576:46
510.87:586:45
610.87:586:44
710.77:596:44
810.78:006:43
910.78:006:42
1010.78:016:41
1110.78:016:41
1210.68:026:40
1310.68:036:39
1410.68:036:39
1510.68:046:38
1610.58:056:37
1710.58:056:37
1810.58:066:36
1910.58:066:36
2010.58:076:35
2110.48:086:35
2210.48:086:34
2310.48:096:34
2410.48:096:33
2510.48:106:33
2610.48:116:32
2710.38:116:32
2810.38:126:32
2910.38:126:31
3010.38:136:31
3110.38:136:31

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 2.88 kWh/m².

For context, solar energy here swings from a low near 2.47 kWh/m² to a high of 6.38 kWh/m² in December across the year — May's 2.88 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.3Moderate
23.3Moderate
33.2Moderate
43.2Moderate
53.2Moderate
63.1Moderate
73.1Moderate
83.1Moderate
93.1Moderate
103.0Moderate
113.0Moderate
123.0Moderate
132.9Moderate
142.9Moderate
152.9Moderate
162.9Moderate
172.8Moderate
182.8Moderate
192.8Moderate
202.8Moderate
212.8Moderate
222.7Moderate
232.7Moderate
242.7Moderate
252.7Moderate
262.7Moderate
272.7Moderate
282.6Moderate
292.6Moderate
302.6Moderate
312.6Moderate
Planning a trip in May

Is May a good time to visit Caxias do Sul?

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

6.1
Sightseeing
4th-best month of the year
3.1
Beach & pool
10th-best month of the year

May is a reasonable time to visit Caxias do Sul for sightseeing.

What to pack for Caxias do Sul in May

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

In May, Caxias do Sul sees daytime highs around 20°C and nights near 11°C. Worth packing: rain gear. About 11 days see rain.

rain gear

UV index in Caxias do Sul in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Caxias do Sul peaks around January 16 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 16UV 14Jun 21UV 4
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar10Extreme
Apr8Very high
May5Moderate
Jun4Moderate
Jul4Moderate
Aug6High
Sep8Very high
Oct8Very high
Nov12Extreme
Dec13Extreme

Air quality in Caxias do Sul 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 Caxias do Sul is worst in August — around 22 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (February, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1822 µg/m³Feb 149 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb9Good
Mar10Good
Apr11Good
May12Moderate
Jun12Good
Jul15Moderate
Aug22Moderate
Sep18Moderate
Oct12Good
Nov11Good
Dec10Good
Location & terrain

Where is Caxias do Sul?

Caxias do Sul sits at 29.2°S, 51.2°W, 787 m above sea level, in Brazil. The nearest listed city is Flores da Cunha, 15 km away.

Topography around Caxias do Sul

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

Within 3 km, the terrain around Caxias do Sul has only modest variations in elevation — a maximum elevation change of 226 m around an average of 758 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 814 m; within 80 km, large variations in elevation — a maximum elevation change of 1,066 m.

The land around Caxias do Sul is covered by artificial surfaces (80%) within 3 km, trees (72%) within 16 km, and trees (66%) and grassland (22%) within 80 km.

3 km
226 m
16 km
814 m
80 km
1,066 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Flores da Cunha 15 km · Farroupilha 18 km · Nova Petrópolis 24 km · São Marcos 24 km · Bento Gonçalves 33 km · Carlos Barbosa 35 km · Garibaldi 36 km · Gramado 38 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 Caxias do Sul (-29.1681°, -51.1794°, elevation 787 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).