La Unión weather in April

In April, La Unión sees average daytime highs of 23°C and overnight lows near 15°C, with 352 mm of rain across 25.5 wet days and about 12.1 hours of daylight. It is the 6th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 0% of the time in April, and the air most often feels humid.

Daylight stretches from about 12 hours at the start of April to 12 h 12 min by month's end. Set against the rest of the year, April is La Unión's 12th-clearest and 10th-windiest month. For the whole year in context, see La Unión's year-round climate.

Daytime high
23°
6th warmest
Overnight low
15°
12th coldest
Rainfall
352 mm
25.5 wet days
Daylight
12 h 06 min
5:58 AM – 6:06 PM
Cloud cover
93%
12th clearest
Wind
3 km/h
10th windiest
Solar energy
4.92 kWh/m²
Travel score
4.0
out of 10

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 23°C through the month.

A typical April day in La Unión reaches about 23°C in the afternoon and slips back to 15°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 25°C. Set against its neighbours, April runs on par with March and on par with May.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12314
22314
32314
42314
52314
62314
72315
82315
92315
102315
112315
122315
132315
142315
152315
162315
172315
182315
192315
202315
212315
222315
232315
242315
252315
262315
272315
282415
292415
302415

La Unión weather by month

How April compares with the rest of the year at a glance. April is the 6th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan23° / 14°16122.311.74.8
Feb23° / 14°19022.511.84.4
Mar23° / 14°30926.9124.1
Apr23° / 15°35225.512.14.0
May24° / 15°31124.812.34.3
Jun24° / 14°13016.912.35.3
Jul25° / 14°8511.812.36.1
Aug25° / 14°11113.112.25.8
Sep24° / 14°21621.6124.7
Oct23° / 14°3672811.93.8
Nov23° / 14°40228.811.73.6
Dec23° / 14°24324.511.74.4

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 0% of the time in April, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 2% of April, with mostly cloudy or overcast conditions the remaining 98%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1694
2694
3595
4595
5595
6496
7496
8298
9298
10298
11199
12199
13199
14199
15199
16199
17199
18199
19199
20199
21199
22199
23199
24199
25199
26199
27199
28199
29199
30199

Chance of precipitation in April

Any precipitation

La Unión gets around 352 mm of rain over 25.5 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 86% and peaks near 87% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
187
287
387
487
587
687
787
887
987
1087
1187
1287
1387
1487
1587
1687
1787
1886
1986
2086
2185
2285
2385
2484
2584
2684
2784
2884
2984
3083

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the humid band about 56% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
104951
204951
304951
404852
504852
604852
704852
804753
904753
1004753
1104654
1214653
1314554
1414554
1514455
1614455
1714356
1814356
1914257
2014257
2114158
2214158
2314059
2414059
2514059
2614059
2704060
2803961
2903961
3003961

Wind in April

Winds average 3 km/h in April.

Across April, daily wind ranges from about 3 km/h on the calmest days to 3 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
13calm
23calm
33calm
43calm
53calm
63calm
73calm
83calm
93calm
103calm
113calm
123calm
133calm
143calm
153calm
163calm
173calm
183calm
193calm
203calm
213calm
223calm
233calm
243calm
253calm
263calm
273calm
283calm
293calm
303calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 hours at the start of April to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over April. Sunrise moves from 6:05 AM to 5:53 AM, and sunset from 6:08 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:056:08
212.16:046:07
312.16:046:07
412.16:036:07
512.16:036:07
612.16:026:07
712.16:026:07
812.16:016:07
912.16:016:06
1012.16:006:06
1112.16:006:06
1212.15:596:06
1312.15:596:06
1412.15:596:06
1512.15:586:06
1612.15:586:06
1712.15:576:06
1812.15:576:05
1912.15:576:05
2012.25:566:05
2112.25:566:05
2212.25:556:05
2312.25:556:05
2412.25:556:05
2512.25:546:05
2612.25:546:05
2712.25:546:05
2812.25:536:05
2912.25:536:05
3012.25:536:05

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.92 kWh/m².

For context, solar energy here swings from a low near 4.3 kWh/m² to a high of 6.22 kWh/m² in August across the year — April's 4.92 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
124.9Bright
134.9Bright
144.9Bright
154.9Bright
164.9Bright
174.9Bright
184.9Bright
194.9Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.8Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
Planning a trip in April

Is April a good time to visit La Unión?

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

4.0
Sightseeing
10th-best month of the year
3.3
Beach & pool
10th-best month of the year

April is a reasonable time to visit La Unión for sightseeing.

What to pack for La Unión in April

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

In April, La Unión sees daytime highs around 23°C and nights near 15°C. Pack rain gear. Worth having: light clothes and sun protection. About 26 days see rain.

rain gearlight clothessun protection

UV index in La Unión in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in La Unión peaks around February 21 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 12 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 21UV 16Dec 13UV 12
UV index (midday)Level
Jan13Extreme
Feb16Extreme
Mar16Extreme
Apr12Extreme
May14Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep14Extreme
Oct14Extreme
Nov12Extreme
Dec12Extreme

Air quality in La Unión in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.

Air quality in La Unión is worst in March — around 33 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 17 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 1631 µg/m³Oct 2217 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb25Moderate
Mar33Moderate
Apr24Moderate
May20Moderate
Jun18Moderate
Jul18Moderate
Aug21Moderate
Sep18Moderate
Oct17Moderate
Nov17Moderate
Dec18Moderate
Location & terrain

Where is La Unión?

La Unión sits at 6.0°N, 75.4°W, 2,475 m above sea level, in Colombia. The nearest listed city is La Ceja, 10 km away.

Topography around La Unión

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

Within 3 km, the terrain around La Unión has significant variations in elevation — a maximum elevation change of 274 m around an average of 2,485 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,898 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,673 m.

The land around La Unión is covered by grassland (68%) and trees (23%) within 3 km, trees (56%) and grassland (41%) within 16 km, and trees (66%) and grassland (33%) within 80 km.

3 km
274 m
16 km
1,898 m
80 km
3,673 m
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: La Ceja 10 km · Carmen de Viboral 12 km · Retiro 18 km · Rionegro 20 km · Santuario 21 km · Abejorral 22 km · Marinilla 22 km · Sonsón 30 km

Colombia travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type A / B
120 / 240 V · 60 Hz
Prices
≈ 38% of US
price level, 2025
GDP per capita
$8,562
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
74%
of population, 2024
Homicide rate
24.9
per 100k, 2023
Road deaths
15.4
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 480
Religion
Roman Catholic 64%Protestant 17%none 14%atheist 1%

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 La Unión (5.9743°, -75.3619°, elevation 2,475 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).