Montero weather in May

In May, Montero sees average daytime highs of 26°C and overnight lows near 18°C, with 82 mm of rain across 12 wet days and about 11.2 hours of daylight. It is the 10th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 28°C in the first days to 25°C by the end. The sky is clear or mostly clear about 26% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 11 h 24 min at the start of May to 11 hours by month's end. Set against the rest of the year, May is Montero's 5th-clearest and 6th-windiest month. For the whole year in context, see Montero's year-round climate.

Daytime high
26°
10th warmest
Overnight low
18°
4th coldest
Rainfall
82 mm
12 wet days
Daylight
11 h 12 min
6:34 AM – 5:45 PM
Cloud cover
64%
5th clearest
Wind
11 km/h
6th windiest
Solar energy
3.44 kWh/m²
Travel score
6.3
out of 10

Montero is city in Bolivia.

Density
316/km²
people per km²
Founded
1854

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 28°C in the first days to 25°C by the end.

A typical May day in Montero reaches about 26°C in the afternoon and slips back to 18°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 30°C. Set against its neighbours, May runs about 3°C cooler than April and about 1°C warmer than June.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12820
22820
32819
42819
52719
62719
72719
82719
92719
102719
112719
122719
132719
142719
152618
162618
172618
182618
192618
202618
212618
222618
232618
242518
252518
262518
272518
282518
292518
302518
312518

How May really feels in Montero

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.

Montero 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
Jan30° / 23°23222.612.93.3
Feb30° / 23°20620.912.63.4
Mar30° / 22°15519.612.13.8
Apr29° / 21°961411.64.9
May26° / 18°821211.26.3
Jun25° / 17°619.9116.7
Jul26° / 16°466.611.17.4
Aug28° / 18°505.811.46.6
Sep30° / 20°968.411.95.0
Oct31° / 22°13714.612.44.0
Nov31° / 22°17217.112.83.7
Dec30° / 23°23923.3133.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 58%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24654
34555
44654
54654
64555
74654
84456
94456
104357
114357
124258
134258
144159
154159
164159
174159
184060
194060
203961
213961
223961
233961
243961
253961
263961
274060
284159
294159
304159
314258

Chance of precipitation in May

Any precipitation

Montero gets around 82 mm of rain over 12 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 38% and peaks near 41% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
141
240
340
440
539
639
739
838
938
1038
1138
1237
1337
1437
1538
1638
1738
1838
1938
2038
2138
2238
2338
2438
2538
2638
2738
2837
2937
3036
3136

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 34% of days. Sticky, muggy-or-worse air turns up on roughly 54% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11181321461
21281321451
31291321441
41391421430
513101421420
613101421410
713111521400
813111521390
914121522380
1014131522370
1114131522360
1214141522350
1314141622350
1414151621340
1514151621340
1614161621330
1714161621330
1815171620330
1915171620320
2015181619320
2116181619310
2216181619300
2317181718300
2417181718290
2518181818290
2619181818280
2719171818280
2820171918270
2920171918270
3020161918260
3121161919260

Wind in May

Winds average 11 km/h in May.

Across May, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm
3112calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 24 min at the start of May to 11 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over May. Sunrise moves from 6:29 AM to 6:39 AM, and sunset from 5:52 PM to 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.46:295:52
211.46:295:51
311.46:295:51
411.36:305:50
511.36:305:50
611.36:305:49
711.36:315:49
811.36:315:48
911.36:315:48
1011.36:325:47
1111.26:325:47
1211.26:325:46
1311.26:335:46
1411.26:335:46
1511.26:335:45
1611.26:345:45
1711.26:345:45
1811.26:345:44
1911.26:355:44
2011.16:355:44
2111.16:355:44
2211.16:365:43
2311.16:365:43
2411.16:365:43
2511.16:375:43
2611.16:375:42
2711.16:385:42
2811.16:385:42
2911.16:385:42
3011.16:395:42
3111.06:395:42

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.44 kWh/m².

For context, solar energy here swings from a low near 3.26 kWh/m² to a high of 5.42 kWh/m² in October across the year — May's 3.44 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
14.0Moderate
24.0Moderate
33.9Moderate
43.9Moderate
53.9Moderate
63.8Moderate
73.8Moderate
83.7Moderate
93.7Moderate
103.7Moderate
113.6Moderate
123.6Moderate
133.5Moderate
143.5Moderate
153.5Moderate
163.4Moderate
173.4Moderate
183.4Moderate
193.3Moderate
203.3Moderate
213.3Moderate
223.2Moderate
233.2Moderate
243.2Moderate
253.2Moderate
263.2Moderate
273.1Moderate
283.1Moderate
293.1Moderate
303.1Moderate
313.1Moderate
Planning a trip in May

Hazard calendar for Montero

In seasonPeak

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

Montero'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 Montero?

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

6.3
Sightseeing
4th-best month of the year
6.1
Beach & pool
6th-best month of the year

May is a reasonable time to visit Montero for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Montero in May

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

In May, Montero sees daytime highs around 26°C and nights near 18°C. Worth packing: light clothes and rain gear. About 12 days see rain.

light clothesrain gear

UV index in Montero in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Montero peaks around January 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 15 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeJan 18UV 15Jul 15UV 7
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar14Extreme
Apr11Extreme
May9Very high
Jun7Very high
Jul7High
Aug8Very high
Sep9Very high
Oct8Very high
Nov13Extreme
Dec14Extreme

Air quality in Montero 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 Montero is worst in September — around 52 µg/m³ PM2.5 (poor), about 6.7× the cleanest month (May, 8 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateSep 1749 µg/m³May 118 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar10Good
Apr8Good
May8Good
Jun10Good
Jul14Moderate
Aug29Moderate
Sep52Poor
Oct33Moderate
Nov17Moderate
Dec10Good
Location & terrain

Where is Montero?

Montero sits at 17.3°S, 63.3°W, 300 m above sea level, in Bolivia. The nearest listed city is Warnes, 22 km away.

Ascención de GuarayosMizqueSan Ignacio de Velasco

Topography around Montero

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

Within 3 km, the terrain around Montero has only modest variations in elevation — a maximum elevation change of 19 m around an average of 291 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 84 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,536 m.

The land around Montero is covered by artificial surfaces (52%) and trees (21%) within 3 km, grassland (44%), trees (26%) and cropland (23%) within 16 km, and trees (37%), cropland (34%) and grassland (25%) within 80 km.

3 km
19 m
16 km
84 m
80 km
1,536 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Warnes 22 km · Santa Cruz 50 km · Cotoca 57 km · Villa Yapacaní 62 km · El Torno 75 km · Ascención de Guarayos 161 km · Mizque 231 km · San Ignacio de Velasco 266 km

Bolivia travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B / C
230 V · 50 Hz
Prices
≈ 40% of US
price level, 2025
GDP per capita
$5,148
2025
Happiness
5.8 / 10
World Happiness, 2025
Homicide rate
4.4
per 100k, 2023
Road deaths
21.1
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Moderate
EF EPI 521
Religion
Roman Catholic 65%Protestant 20%none 6%other 5%

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 Montero (-17.3387°, -63.2509°, elevation 300 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).