Montalvo weather in May

In May, Montalvo sees average daytime highs of 25°C and overnight lows near 19°C, with 1078 mm of rain across 30.6 wet days and about 11.9 hours of daylight. It is the 3rd-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 0% of the time in May, and the air most often feels muggy.

Daylight stretches from about 11 h 54 min at the start of May to 11 h 54 min by month's end. Set against the rest of the year, May is Montalvo's 6th-clearest and 10th-windiest month. For the whole year in context, see Montalvo's year-round climate.

Daytime high
25°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
1078 mm
30.6 wet days
Daylight
11 h 54 min
6:16 AM – 6:11 PM
Cloud cover
91%
6th clearest
Wind
4 km/h
10th windiest
Solar energy
3.54 kWh/m²
Travel score
3.5
out of 10

Montalvo is Town and urban parish of Los Ríos Province, Ecuador.

Founded
1906

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 25°C through the month.

A typical May day in Montalvo reaches about 25°C in the afternoon and slips back to 19°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 26°C. Set against its neighbours, May runs on par with April and about 1°C warmer than June.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12519
22519
32519
42519
52519
62519
72519
82519
92519
102519
112519
122519
132519
142519
152519
162519
172519
182519
192519
202519
212519
222419
232419
242419
252419
262419
272419
282419
292419
302419
312419

Montalvo weather by month

How May compares with the rest of the year at a glance. May is the 3rd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 19°110730.612.13.5
Feb25° / 19°10622812.13.4
Mar25° / 19°110730.7123.4
Apr25° / 19°110129.4123.4
May25° / 19°107830.611.93.5
Jun24° / 18°73929.811.93.5
Jul23° / 17°65630.511.93.5
Aug23° / 17°50630.411.93.6
Sep23° / 17°58629.6123.5
Oct24° / 18°47028.2123.8
Nov24° / 18°38425.912.14.0
Dec24° / 19°73029.412.13.7

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 0% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 1% of May, with mostly cloudy or overcast conditions the remaining 99%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1199
2199
3199
4199
5199
6199
7199
8199
9199
10199
11199
12199
13199
14199
15199
16199
17199
18199
19199
20199
21199
22199
23199
24199
25199
26199
27199
28199
29199
30199
31199

Chance of precipitation in May

Any precipitation

Montalvo gets around 1078 mm of rain over 30.6 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 99% and peaks near 100% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
1100
2100
3100
4100
5100
6100
799
899
999
1099
1199
1299
1399
1499
1598
1698
1798
1898
1998
2098
2198
2298
2398
2498
2598
2698
2798
2899
2999
3099
3199

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the muggy band about 95% of days. Sticky, muggy-or-worse air turns up on roughly 96% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)
11981
21981
31981
41981
51981
61981
71981
81981
91981
101981
111981
121981
131981
142971
152971
162971
173961
183961
194951
204951
215941
226931
236931
247921
257921
268911
278920
289910
299910
3010900
3110900

Wind in May

Winds average 4 km/h in May.

Across May, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 54 min at the start of May to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over May. Sunrise moves from 6:16 AM to 6:17 AM, and sunset from 6:12 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:166:12
211.96:166:12
311.96:166:12
411.96:166:12
511.96:166:12
611.96:166:12
711.96:166:12
811.96:166:11
911.96:166:11
1011.96:166:11
1111.96:166:11
1211.96:166:11
1311.96:166:11
1411.96:166:11
1511.96:166:11
1611.96:166:11
1711.96:166:11
1811.96:166:11
1911.96:166:11
2011.96:166:11
2111.96:166:11
2211.96:166:11
2311.96:166:11
2411.96:166:11
2511.96:176:11
2611.96:176:11
2711.96:176:11
2811.96:176:11
2911.96:176:11
3011.96:176:12
3111.96:176:12

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.54 kWh/m².

For context, solar energy here swings from a low near 3.5 kWh/m² to a high of 4.24 kWh/m² in September across the year — May's 3.54 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.6Moderate
23.6Moderate
33.6Moderate
43.6Moderate
53.6Moderate
63.6Moderate
73.6Moderate
83.6Moderate
93.6Moderate
103.6Moderate
113.6Moderate
123.6Moderate
133.6Moderate
143.6Moderate
153.5Moderate
163.5Moderate
173.5Moderate
183.5Moderate
193.5Moderate
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

Is May a good time to visit Montalvo?

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

3.5
Sightseeing
5th-best month of the year
3.1
Beach & pool
6th-best month of the year

May is a weaker month for outdoor sightseeing in Montalvo.

What to pack for Montalvo in May

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

In May, Montalvo sees daytime highs around 25°C and nights near 19°C. Pack rain gear. Worth having: light clothes. About 31 days see rain.

rain gearlight clothes

UV index in Montalvo in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Montalvo peaks around March 10 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 19 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 10UV 16Jul 19UV 11
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar16Extreme
Apr14Extreme
May14Extreme
Jun12Extreme
Jul11Extreme
Aug11Extreme
Sep12Extreme
Oct14Extreme
Nov12Extreme
Dec12Extreme

Air quality in Montalvo 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 Montalvo is worst in November — around 47 µg/m³ PM2.5 (poor), about 2.4× the cleanest month (January, 20 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorNov 1745 µg/m³Jan 2420 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb20Moderate
Mar22Moderate
Apr23Moderate
May21Moderate
Jun21Moderate
Jul21Moderate
Aug21Moderate
Sep23Moderate
Oct27Moderate
Nov47Poor
Dec30Moderate
Location & terrain

Where is Montalvo?

Montalvo sits at 1.8°S, 79.3°W, 65 m above sea level, in Ecuador. The nearest listed city is Babahoyo, 26 km away.

Topography around Montalvo

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

Within 3 km, the terrain around Montalvo has only modest variations in elevation — a maximum elevation change of 155 m around an average of 75 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 2,468 m; within 80 km, extreme variations in elevation — a maximum elevation change of 6,245 m.

The land around Montalvo is covered by trees (69%) within 3 km, trees (60%) and grassland (22%) within 16 km, and trees (38%) and grassland (34%) within 80 km.

3 km
155 m
16 km
2,468 m
80 km
6,245 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: Babahoyo 26 km · Guaranda 39 km · Ventanas 43 km · Naranjito 47 km · Milagro 51 km · Samborondón 52 km · Yaguachi Nuevo 57 km · Vinces 58 km

Ecuador travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 43% of US
price level, 2025
GDP per capita
$7,125
2025
Happiness
6.1 / 10
World Happiness, 2025
Safe drinking water
70%
of population, 2024
Homicide rate
45.7
per 100k, 2023
Road deaths
20.1
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 466
Religion
Roman Catholic 68%Protestant 19%none 8%other 2%

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 Montalvo (-1.7901°, -79.2876°, elevation 65 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).