Guaíra weather in May

In May, Guaíra sees average daytime highs of 25°C and overnight lows near 16°C, with 126 mm of rain across 8.8 wet days and about 10.9 hours of daylight. It is the 10th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 23°C by the end. The sky is clear or mostly clear about 39% of the time in May, and the air most often feels humid.

Daylight stretches from about 11 h 06 min at the start of May to 10 h 36 min by month's end. Set against the rest of the year, May is Guaíra's 7th-clearest and 7th-windiest month. For the whole year in context, see Guaíra's year-round climate.

Daytime high
25°
10th warmest
Overnight low
16°
4th coldest
Rainfall
126 mm
8.8 wet days
Daylight
10 h 48 min
8:08 AM – 6:58 PM
Cloud cover
54%
7th clearest
Wind
9 km/h
7th windiest
Solar energy
3.46 kWh/m²
Travel score
7.1
out of 10

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 23°C by the end.

A typical May day in Guaíra 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 20°C and 29°C. Set against its neighbours, May runs about 4°C cooler than April and about 1°C warmer than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12717
22617
32617
42617
52617
62617
72617
82516
92516
102516
112516
122516
132516
142516
152516
162416
172416
182416
192416
202415
212415
222415
232415
242415
252415
262415
272315
282315
292315
302315
312315

How May really feels in Guaíra

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.

Guaíra weather by month

How May compares with the rest of the year at a glance. May is the 10th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 22°14717.613.33.6
Feb31° / 22°14915.412.83.8
Mar30° / 21°10712.812.24.5
Apr28° / 19°958.311.56.1
May25° / 16°1268.810.97.1
Jun24° / 15°1078.110.57.4
Jul24° / 14°896.910.77.6
Aug26° / 15°886.511.27.6
Sep28° / 17°1278.811.96.7
Oct29° / 19°16512.812.65.0
Nov30° / 20°14812.513.24.7
Dec31° / 22°16415.713.53.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 11% of May, with mostly cloudy or overcast conditions the remaining 49%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25446
35446
45446
55347
65347
75347
85248
95248
105248
115248
125149
135149
145149
155149
165050
175050
184951
194951
204951
214852
224852
234951
244852
254951
264951
274951
284951
294951
305050
315050

Chance of precipitation in May

Any precipitation

Guaíra gets around 126 mm of rain over 8.8 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 28% and peaks near 34% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
123
223
323
423
523
623
723
823
924
1024
1124
1225
1325
1426
1526
1627
1728
1829
1930
2031
2131
2232
2333
2433
2533
2633
2734
2834
2933
3033
3132

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 33% of days. Sticky, muggy-or-worse air turns up on roughly 25% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1101634346
2111735335
3111835325
4121934314
5132034303
6132034293
7142134293
8142234282
9152334272
10152334262
11162434252
12162434241
13162534241
14172534231
15172534221
16182634211
17182634211
18182634202
19192733192
20202733192
21202733182
22212732182
23222732172
24232731172
25242731172
26242730172
27252730171
28262729171
29272729171
30272628171
31282628171

Wind in May

Winds average 9 km/h in May.

Across May, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 06 min at the start of May to 10 h 36 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 8:01 AM to 8:15 AM, and sunset from 7:08 PM to 6:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.18:017:08
211.18:017:07
311.18:027:06
411.18:027:05
511.08:037:05
611.08:037:04
711.08:047:03
811.08:047:03
911.08:057:02
1010.98:057:02
1110.98:067:01
1210.98:067:00
1310.98:077:00
1410.98:076:59
1510.98:086:59
1610.88:086:58
1710.88:096:58
1810.88:096:57
1910.88:106:57
2010.88:106:57
2110.88:116:56
2210.78:116:56
2310.78:126:55
2410.78:126:55
2510.78:136:55
2610.78:136:55
2710.78:136:54
2810.78:146:54
2910.78:146:54
3010.68:156:54
3110.68:156:53

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.46 kWh/m².

For context, solar energy here swings from a low near 3.07 kWh/m² to a high of 6.31 kWh/m² in December across the year — May's 3.46 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.0Bright
24.0Moderate
33.9Moderate
43.9Moderate
53.9Moderate
63.8Moderate
73.8Moderate
83.8Moderate
93.7Moderate
103.7Moderate
113.7Moderate
123.6Moderate
133.6Moderate
143.5Moderate
153.5Moderate
163.5Moderate
173.4Moderate
183.4Moderate
193.4Moderate
203.3Moderate
213.3Moderate
223.3Moderate
233.2Moderate
243.2Moderate
253.2Moderate
263.1Moderate
273.1Moderate
283.1Moderate
293.1Moderate
303.1Moderate
313.1Moderate
Planning a trip in May

Is May a good time to visit Guaíra?

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

7.1
Sightseeing
4th-best month of the year
6.3
Beach & pool
7th-best month of the year

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

What to pack for Guaíra in May

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

In May, Guaíra 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 Guaíra in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Guaíra peaks around January 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighExtremeJan 19UV 15Jul 10UV 5
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar12Extreme
Apr9Very high
May6High
Jun5High
Jul5High
Aug7Very high
Sep6High
Oct10Extreme
Nov12Extreme
Dec14Extreme

Air quality in Guaíra 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 Guaíra is worst in September — around 26 µg/m³ PM2.5 (moderate), about 4.7× the cleanest month (March, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1525 µg/m³Mar 166 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb7Good
Mar6Good
Apr7Good
May8Good
Jun8Good
Jul7Good
Aug17Moderate
Sep26Moderate
Oct13Moderate
Nov9Good
Dec7Good
Location & terrain

Where is Guaíra?

Guaíra sits at 24.1°S, 54.2°W, 256 m above sea level, in Brazil. The nearest listed city is Terra Roxa, 17 km away.

Topography around Guaíra

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

Within 3 km, the terrain around Guaíra has only modest variations in elevation — a maximum elevation change of 71 m around an average of 239 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 152 m; within 80 km, significant variations in elevation — a maximum elevation change of 334 m.

The land around Guaíra is covered by water (26%), grassland (22%) and trees (21%) within 3 km, cropland (46%), grassland (22%) and trees (20%) within 16 km, and cropland (58%) within 80 km.

3 km
71 m
16 km
152 m
80 km
334 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Terra Roxa 17 km · Altônia 42 km · Palotina 47 km · Iporã 56 km · Marechal Cândido Rondon 56 km · Itaquiraí 68 km · Assis Chateaubriand 83 km · Toledo 87 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 Guaíra (-24.082°, -54.2462°, elevation 256 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).