Guaratinguetá weather in May

In May, Guaratinguetá sees average daytime highs of 23°C and overnight lows near 14°C, with 55 mm of rain across 8.4 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 24°C in the first days to 23°C by the end. The sky is clear or mostly clear about 35% 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 Guaratinguetá's 4th-clearest and 8th-windiest month. For the whole year in context, see Guaratinguetá's year-round climate.

Daytime high
23°
10th warmest
Overnight low
14°
4th coldest
Rainfall
55 mm
8.4 wet days
Daylight
10 h 54 min
7:30 AM – 6:24 PM
Cloud cover
54%
4th clearest
Wind
5 km/h
8th windiest
Solar energy
3.71 kWh/m²
Travel score
7.2
out of 10

Guaratinguetá 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 24°C in the first days to 23°C by the end.

A typical May day in Guaratinguetá reaches about 23°C in the afternoon and slips back to 14°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 27°C. Set against its neighbours, May runs about 3°C cooler than April and on par with June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12515
22515
32415
42415
52415
62414
72414
82414
92414
102414
112414
122314
132314
142314
152314
162314
172314
182314
192313
202313
212313
222313
232313
242313
252313
262313
272313
282313
292313
302313
312313

Guaratinguetá 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
Jan28° / 19°29624.113.24.3
Feb28° / 19°21019.512.84.6
Mar27° / 18°19620.512.24.9
Apr26° / 16°7911.411.56.5
May23° / 14°558.410.97.2
Jun23° / 12°335.810.67.7
Jul23° / 12°355.210.77.8
Aug24° / 12°375.811.27.9
Sep25° / 14°9110.911.96.7
Oct26° / 16°14416.412.55.6
Nov26° / 17°20719.513.15.0
Dec27° / 18°25422.813.44.4

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 19% of May, with mostly cloudy or overcast conditions the remaining 46%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
26040
36040
45941
55842
65842
75743
85545
95545
105446
115347
125248
135149
145149
155050
165050
175050
184951
194951
205050
215050
225149
235248
245248
255248
265347
275347
285347
295446
305446
315545

Chance of precipitation in May

Any precipitation

Guaratinguetá gets around 55 mm of rain over 8.4 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 27% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
127
227
327
427
526
626
726
826
927
1027
1127
1227
1328
1428
1528
1628
1728
1828
1928
2028
2128
2228
2328
2428
2528
2628
2728
2827
2927
3027
3126

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 49% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
11549333
21650322
31850312
41950301
52150291
62250281
72350271
82450260
92451250
102550250
112650240
122750230
132850220
142851210
152951200
163050200
173150190
183151180
193251170
203251170
213351160
223450160
233550150
243649140
253749140
263848140
273948130
284047130
294147130
304146120
314246120

Wind in May

Winds average 5 km/h in May.

Across May, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

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 7:23 AM to 7:37 AM, and sunset from 6:33 PM to 6:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.27:236:33
211.17:236:32
311.17:246:32
411.17:246:31
511.17:256:30
611.17:256:30
711.17:266:29
811.07:266:28
911.07:276:28
1011.07:276:27
1111.07:276:27
1211.07:286:26
1311.07:286:26
1410.97:296:25
1510.97:296:25
1610.97:306:24
1710.97:306:24
1810.97:316:23
1910.97:316:23
2010.87:326:23
2110.87:326:22
2210.87:336:22
2310.87:336:22
2410.87:346:21
2510.87:346:21
2610.87:346:21
2710.87:356:20
2810.77:356:20
2910.77:366:20
3010.77:366:20
3110.77:376:20

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.71 kWh/m².

For context, solar energy here swings from a low near 3.55 kWh/m² to a high of 5.61 kWh/m² in February across the year — May's 3.71 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.1Bright
44.0Bright
54.0Bright
64.0Moderate
73.9Moderate
83.9Moderate
93.9Moderate
103.8Moderate
113.8Moderate
123.8Moderate
133.7Moderate
143.7Moderate
153.7Moderate
163.6Moderate
173.6Moderate
183.6Moderate
193.6Moderate
203.5Moderate
213.5Moderate
223.5Moderate
233.5Moderate
243.5Moderate
253.5Moderate
263.5Moderate
273.5Moderate
283.5Moderate
293.5Moderate
303.5Moderate
313.5Moderate
Planning a trip in May

Hazard calendar for Guaratinguetá

In seasonPeak

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

Guaratinguetá's rainy season runs October–March, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Guaratinguetá?

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

7.2
Sightseeing
4th-best month of the year
5.7
Beach & pool
6th-best month of the year

May is one of the better times to visit Guaratinguetá for general sightseeing.

What to pack for Guaratinguetá in May

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

In May, Guaratinguetá sees daytime highs around 23°C and nights near 14°C. Worth packing: light clothes and rain gear. About 8 days see rain.

light clothesrain gear

Sea temperature near Guaratinguetá in May

The nearest coast averages about 24°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 67 km away) is warmest in February at about 27°C and coldest in August near 21°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°22°24°26°28°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr26Warm
May24Warm
Jun23Refreshing
Jul22Refreshing
Aug21Refreshing
Sep22Refreshing
Oct23Refreshing
Nov23Refreshing
Dec25Warm

UV index in Guaratinguetá 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 Guaratinguetá peaks around January 24 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 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 24UV 15Jul 11UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May7High
Jun6High
Jul6High
Aug8Very high
Sep7Very high
Oct12Extreme
Nov14Extreme
Dec15Extreme

Air quality in Guaratinguetá 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 Guaratinguetá is worst in September — around 19 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1518 µg/m³Dec 209 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar10Good
Apr11Good
May13Moderate
Jun13Moderate
Jul13Moderate
Aug14Moderate
Sep19Moderate
Oct13Moderate
Nov10Good
Dec9Good
Location & terrain

Where is Guaratinguetá?

Guaratinguetá sits at 22.8°S, 45.2°W, 545 m above sea level, in Brazil. The nearest listed city is Aparecida, 5.0 km away.

Topography around Guaratinguetá

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

Within 3 km, the terrain around Guaratinguetá has only modest variations in elevation — a maximum elevation change of 200 m around an average of 560 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 828 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,756 m.

The land around Guaratinguetá is covered by grassland (35%), artificial surfaces (31%) and trees (28%) within 3 km, grassland (50%) and trees (33%) within 16 km, and trees (52%) and grassland (38%) within 80 km.

3 km
200 m
16 km
828 m
80 km
2,756 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Aparecida 5.0 km · Potim 7.0 km · Lorena 12 km · Cachoeira Paulista 25 km · Pindamonhangaba 30 km · Cruzeiro 35 km · Cunha 37 km · Tremembé 40 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 Guaratinguetá (-22.8164°, -45.1925°, elevation 545 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).