Cidreira weather in May

In May, Cidreira sees average daytime highs of 21°C and overnight lows near 16°C, with 108 mm of rain across 9.2 wet days and about 10.5 hours of daylight. It is the 8th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 20°C by the end. The sky is clear or mostly clear about 32% of the time in May, and the air most often feels humid.

Daylight stretches from about 10 h 48 min at the start of May to 10 h 12 min by month's end. Set against the rest of the year, May is Cidreira's 7th-clearest and 11th-windiest month. For the whole year in context, see Cidreira's year-round climate.

Daytime high
21°
8th warmest
Overnight low
16°
5th coldest
Rainfall
108 mm
9.2 wet days
Daylight
10 h 30 min
8:03 AM – 6:32 PM
Cloud cover
57%
7th clearest
Wind
16 km/h
11th windiest
Solar energy
2.99 kWh/m²
Travel score
6.6
out of 10

Cidreira is chief city of Cidreira Municipality, Rio Grande do Sul, 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 22°C in the first days to 20°C by the end.

A typical May day in Cidreira reaches about 21°C in the afternoon and slips back to 16°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 24°C. Set against its neighbours, May runs about 3°C cooler than April and about 2°C warmer than June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12218
22218
32218
42217
52217
62217
72217
82217
92217
102117
112117
122117
132117
142117
152117
162116
172116
182116
192116
202016
212016
222016
232016
242016
252015
262015
272015
282015
292015
302015
311915

Cidreira weather by month

How May compares with the rest of the year at a glance. May is the 8th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 22°10111.513.76.3
Feb27° / 22°9211.613.16.1
Mar26° / 22°10410.912.26.6
Apr24° / 19°859.211.37.0
May21° / 16°1089.210.56.6
Jun19° / 14°1069.410.16.1
Jul18° / 13°12510.110.35.9
Aug19° / 14°1169.910.96.2
Sep20° / 15°13710.911.86.0
Oct22° / 17°14412.112.76.2
Nov24° / 19°1039.713.57.0
Dec26° / 21°1011013.96.8

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 18% of May, with mostly cloudy or overcast conditions the remaining 49%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25248
35248
45248
55248
65248
75248
85248
95248
105248
115248
125248
135248
145248
155248
165248
175248
185248
195149
205149
215050
225050
235050
245050
254951
264951
274852
284753
294753
304753
314753

Chance of precipitation in May

Any precipitation

Cidreira gets around 108 mm of rain over 9.2 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 30% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
130
230
330
430
530
630
730
830
930
1030
1130
1230
1330
1430
1530
1629
1729
1829
1929
2029
2129
2229
2329
2429
2529
2629
2729
2829
2929
3029
3130

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 31% of days. Sticky, muggy-or-worse air turns up on roughly 16% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1192133243
2192233232
3202332232
4202432222
5212432221
6212532211
7212533201
8222633191
9222633190
10222633180
11232633170
12232733170
13242733170
14242733160
15242633160
16252633160
17262633150
18272633150
19282633140
20292532130
21302532130
22312531120
23332530110
24342630110
25352629100
26372628100
2738262790
2839272780
2940272680
3040272570
3141282570

Wind in May

Winds average 16 km/h in May.

Across May, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 10 h 48 min at the start of May to 10 h 12 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 7:53 AM to 8:12 AM, and sunset from 6:43 PM to 6:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.87:536:43
210.87:536:42
310.87:546:42
410.87:556:41
510.77:556:40
610.77:566:39
710.77:576:38
810.77:576:37
910.67:586:37
1010.67:596:36
1110.67:596:35
1210.68:006:34
1310.68:016:34
1410.58:016:33
1510.58:026:32
1610.58:036:32
1710.58:036:31
1810.48:046:30
1910.48:046:30
2010.48:056:29
2110.48:066:29
2210.48:066:28
2310.38:076:28
2410.38:086:27
2510.38:086:27
2610.38:096:26
2710.38:096:26
2810.38:106:26
2910.28:116:25
3010.28:116:25
3110.28:126:25

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 2.99 kWh/m².

For context, solar energy here swings from a low near 2.53 kWh/m² to a high of 6.88 kWh/m² in December across the year — May's 2.99 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.4Moderate
23.4Moderate
33.3Moderate
43.3Moderate
53.3Moderate
63.3Moderate
73.2Moderate
83.2Moderate
93.2Moderate
103.1Moderate
113.1Moderate
123.1Moderate
133.1Moderate
143.0Moderate
153.0Moderate
163.0Moderate
173.0Moderate
182.9Moderate
192.9Moderate
202.9Moderate
212.9Moderate
222.9Moderate
232.8Moderate
242.8Moderate
252.8Moderate
262.8Moderate
272.8Moderate
282.7Moderate
292.7Moderate
302.7Moderate
312.7Moderate
Planning a trip in May

Is May a good time to visit Cidreira?

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

6.6
Sightseeing
4th-best month of the year
4.0
Beach & pool
8th-best month of the year

May is a reasonable time to visit Cidreira for sightseeing.

What to pack for Cidreira in May

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

In May, Cidreira sees daytime highs around 21°C and nights near 16°C. Worth packing: rain gear. About 9 days see rain.

rain gear

Sea temperature near Cidreira in May

The nearest coast averages about 20°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in February at about 25°C and coldest in August near 16°C.

It's comfortable for a long swim from Nov 9 to May 19 — about 6.3 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan24Warm
Feb25Warm
Mar24Warm
Apr23Refreshing
May20Refreshing
Jun18Cool
Jul16Cool
Aug16Cool
Sep17Cool
Oct19Cool
Nov20Refreshing
Dec23Refreshing

UV index in Cidreira in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cidreira peaks around January 17 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateVery highExtremeJan 17UV 13Jun 19UV 3
UV index (midday)Level
Jan13Extreme
Feb12Extreme
Mar10Very high
Apr7Very high
May4Moderate
Jun3Moderate
Jul4Moderate
Aug5Moderate
Sep8Very high
Oct9Very high
Nov11Extreme
Dec12Extreme

Air quality in Cidreira 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 Cidreira is worst in August — around 15 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (February, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1815 µg/m³Feb 207 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb7Good
Mar7Good
Apr8Good
May8Good
Jun8Good
Jul11Good
Aug15Moderate
Sep12Good
Oct9Good
Nov8Good
Dec8Good
Location & terrain

Where is Cidreira?

Cidreira sits at 30.2°S, 50.2°W, 5 m above sea level, in Brazil. The nearest listed city is Tramandaí, 23 km away.

Topography around Cidreira

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

Within 3 km, the terrain around Cidreira has only modest variations in elevation — a maximum elevation change of 17 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 56 m; within 80 km, large variations in elevation — a maximum elevation change of 987 m.

The land around Cidreira is covered by water (46%) within 3 km, water (56%) within 16 km, and water (45%) within 80 km.

3 km
17 m
16 km
56 m
80 km
987 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: Tramandaí 23 km · Imbé 24 km · Osório 33 km · Xangri-lá 45 km · Santo Antônio da Patrulha 50 km · Capão da Canoa 52 km · Rolante 69 km · Viamão 79 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 Cidreira (-30.1811°, -50.2056°, elevation 5 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).