Serra Negra weather in May

In May, Serra Negra sees average daytime highs of 25°C and overnight lows near 15°C, with 64 mm of rain across 6.5 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 26°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 Serra Negra's 5th-clearest and 8th-windiest month. For the whole year in context, see Serra Negra's year-round climate.

Daytime high
25°
10th warmest
Overnight low
15°
4th coldest
Rainfall
64 mm
6.5 wet days
Daylight
10 h 54 min
7:36 AM – 6:31 PM
Cloud cover
47%
5th clearest
Wind
7 km/h
8th windiest
Solar energy
4.02 kWh/m²
Travel score
7.6
out of 10

Serra Negra 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 26°C in the first days to 24°C by the end.

A typical May day in Serra Negra 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 28°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)
12616
22616
32616
42615
52615
62615
72615
82515
92515
102515
112515
122515
132515
142515
152515
162515
172515
182514
192414
202414
212414
222414
232414
242414
252414
262414
272414
282414
292414
302414
312414

Serra Negra 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°25522.413.23.9
Feb29° / 20°17518.412.84.2
Mar29° / 19°13817.412.24.8
Apr27° / 17°708.711.56.7
May25° / 15°646.510.97.6
Jun24° / 13°434.610.68.2
Jul25° / 13°383.910.88.4
Aug26° / 14°31411.28.0
Sep28° / 16°858.411.96.7
Oct28° / 18°12313.512.55.3
Nov28° / 19°16716.613.14.9
Dec29° / 20°21020.413.44.3

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 18% of May, with mostly cloudy or overcast conditions the remaining 36%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17030
27030
36931
46832
56832
66733
76733
86535
96436
106436
116337
126238
136238
146139
156139
166139
176139
186139
196139
206238
216139
226238
236238
246337
256337
266436
276436
286337
296436
306436
316535

Chance of precipitation in May

Any precipitation

Serra Negra gets around 64 mm of rain over 6.5 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 (%)
120
220
319
418
518
618
718
818
918
1019
1119
1219
1320
1420
1521
1621
1722
1823
1923
2024
2124
2224
2324
2424
2524
2624
2724
2823
2923
3022
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 44% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
11945315
22045304
32246294
42346283
52446273
62546262
72647262
82647252
92747252
102847242
112847232
122947231
133046231
143146221
153245221
163245221
173344221
183444221
193543221
203643210
213642210
223742210
233841200
243941200
254041190
264141190
274140180
284240180
294240170
304240170
314341161

Wind in May

Winds average 7 km/h in May.

Across May, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

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 7:29 AM to 7:42 AM, and sunset from 6:39 PM to 6:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.27:296:39
211.27:296:39
311.17:306:38
411.17:306:37
511.17:306:37
611.17:316:36
711.17:316:35
811.07:326:35
911.07:326:34
1011.07:336:34
1111.07:336:33
1211.07:346:33
1311.07:346:32
1410.97:356:32
1510.97:356:31
1610.97:366:31
1710.97:366:30
1810.97:366:30
1910.97:376:29
2010.97:376:29
2110.87:386:29
2210.87:386:28
2310.87:396:28
2410.87:396:28
2510.87:406:27
2610.87:406:27
2710.87:416:27
2810.87:416:27
2910.77:416:26
3010.77:426:26
3110.77:426:26

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.02 kWh/m².

For context, solar energy here swings from a low near 3.76 kWh/m² to a high of 5.95 kWh/m² in November across the year — May's 4.02 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.4Bright
44.4Bright
54.4Bright
64.3Bright
74.3Bright
84.3Bright
94.2Bright
104.2Bright
114.1Bright
124.1Bright
134.0Bright
144.0Bright
154.0Moderate
164.0Moderate
173.9Moderate
183.9Moderate
193.9Moderate
203.8Moderate
213.8Moderate
223.8Moderate
233.8Moderate
243.8Moderate
253.8Moderate
263.8Moderate
273.8Moderate
283.8Moderate
293.8Moderate
303.8Moderate
313.8Moderate
Planning a trip in May

Hazard calendar for Serra Negra

In seasonPeak

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

Serra Negra'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 Serra Negra?

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

7.6
Sightseeing
4th-best month of the year
6.8
Beach & pool
6th-best month of the year

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

What to pack for Serra Negra in May

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

In May, Serra Negra sees daytime highs around 25°C and nights near 15°C. Worth packing: light clothes. About 7 days see rain.

light clothes

UV index in Serra Negra 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 Serra Negra peaks around January 20 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 20UV 15Jul 12UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul6High
Aug8Very high
Sep8Very high
Oct11Extreme
Nov14Extreme
Dec14Extreme

Air quality in Serra Negra 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 Serra Negra is worst in September — around 27 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (December, 15 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateSep 1227 µg/m³Dec 1515 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb16Moderate
Mar18Moderate
Apr21Moderate
May24Moderate
Jun25Moderate
Jul26Moderate
Aug25Moderate
Sep27Moderate
Oct20Moderate
Nov15Moderate
Dec15Moderate
Location & terrain

Where is Serra Negra?

Serra Negra sits at 22.6°S, 46.7°W, 937 m above sea level, in Brazil. The nearest listed city is Amparo, 12 km away.

Topography around Serra Negra

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

Within 3 km, the terrain around Serra Negra has significant variations in elevation — a maximum elevation change of 495 m around an average of 1,012 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 669 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,505 m.

The land around Serra Negra is covered by trees (45%) and grassland (38%) within 3 km, grassland (45%) and trees (43%) within 16 km, and trees (39%) and grassland (35%) within 80 km.

3 km
495 m
16 km
669 m
80 km
1,505 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Amparo 12 km · Águas de Lindóia 17 km · Socorro 18 km · Pinhalzinho 22 km · Santo Antônio de Posse 22 km · Itapira 23 km · Monte Sião 24 km · Jaguariúna 31 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 Serra Negra (-22.6122°, -46.7006°, elevation 937 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).