San Martín weather in April

In April, San Martín sees average daytime highs of 28°C and overnight lows near 22°C, with 478 mm of rain across 29.6 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 2% of the time in April, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of April to 12 h 18 min by month's end. Set against the rest of the year, April is San Martín's 6th-clearest and 10th-windiest month. For the whole year in context, see San Martín's year-round climate.

Daytime high
28°
4th warmest
Overnight low
22°
11th coldest
Rainfall
478 mm
29.6 wet days
Daylight
12 h 12 min
5:49 AM – 6:00 PM
Cloud cover
90%
6th clearest
Wind
4 km/h
10th windiest
Solar energy
4.86 kWh/m²
Travel score
2.9
out of 10

San Martín is municipality in Cesar, Colombia.

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical April day in San Martín reaches about 28°C in the afternoon and slips back to 22°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 30°C. Set against its neighbours, April runs on par with March and on par with May.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12922
22922
32922
42922
52922
62822
72822
82822
92822
102822
112822
122822
132822
142822
152822
162822
172822
182822
192822
202822
212822
222822
232822
242822
252822
262822
272822
282822
292822
302822

San Martín weather by month

How April compares with the rest of the year at a glance. April is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 21°11120.211.64.5
Feb29° / 21°14318.711.74.1
Mar29° / 22°27526.611.93.4
Apr28° / 22°47829.612.22.9
May28° / 22°64430.712.43.0
Jun28° / 21°61729.812.53.1
Jul28° / 21°59130.812.43.2
Aug28° / 21°5883112.33.1
Sep28° / 21°50629.8123.2
Oct28° / 21°45230.111.83.3
Nov28° / 21°3782911.63.3
Dec28° / 21°20626.211.53.8

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 4% of April, with mostly cloudy or overcast conditions the remaining 95%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11387
21189
31090
41090
5892
6892
7892
8793
9793
10694
11595
12595
13496
14496
15496
16496
17397
18397
19397
20397
21397
22397
23397
24397
25397
26397
27397
28397
29397
30397

Chance of precipitation in April

Any precipitation

San Martín gets around 478 mm of rain over 29.6 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 99% and peaks near 100% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
195
295
395
496
596
697
797
898
998
1098
1199
1299
1399
1499
1599
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
2999
3099

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the oppressive band about 92% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)
11387
21288
31189
41090
51090
6991
7991
8991
9991
10991
11991
12892
13892
14892
15892
16892
17892
18892
19793
20793
21793
22694
23694
24694
25595
26595
27595
28595
29496
30496

Wind in April

Winds average 4 km/h in April.

Across April, 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.

0246810151015202530
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

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 06 min at the start of April to 12 h 18 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 5:57 AM to 5:43 AM, and sunset from 6:01 PM to 6:00 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.15:576:01
212.15:566:01
312.15:566:00
412.15:556:00
512.15:556:00
612.15:546:00
712.15:546:00
812.15:536:00
912.15:526:00
1012.15:526:00
1112.15:516:00
1212.15:516:00
1312.25:506:00
1412.25:506:00
1512.25:496:00
1612.25:496:00
1712.25:496:00
1812.25:485:59
1912.25:485:59
2012.25:475:59
2112.25:475:59
2212.25:465:59
2312.25:465:59
2412.25:455:59
2512.25:455:59
2612.25:455:59
2712.35:445:59
2812.35:445:59
2912.35:445:59
3012.35:436:00

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.86 kWh/m².

For context, solar energy here swings from a low near 4.3 kWh/m² to a high of 5.68 kWh/m² in February across the year — April's 4.86 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.2Bright
35.2Bright
45.2Bright
55.1Bright
65.1Bright
75.1Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
124.9Bright
134.9Bright
144.9Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.6Bright
294.6Bright
304.6Bright
Planning a trip in April

Is April a good time to visit San Martín?

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

2.9
Sightseeing
12th-best month of the year
3.5
Beach & pool
6th-best month of the year

April is a weaker month for outdoor sightseeing in San Martín.

What to pack for San Martín in April

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

In April, San Martín sees daytime highs around 28°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 30 days see rain.

light clothesrain gearsun protection

UV index in San Martín in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in San Martín peaks around February 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highFeb 16UV 13Dec 13UV 10
UV index (midday)Level
Jan11Extreme
Feb13Extreme
Mar12Extreme
Apr11Extreme
May12Extreme
Jun13Extreme
Jul12Extreme
Aug12Extreme
Sep13Extreme
Oct12Extreme
Nov10Extreme
Dec10Very high

Air quality in San Martín 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 San Martín is worst in March — around 46 µg/m³ PM2.5 (poor), about 3.7× the cleanest month (December, 13 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMar 1844 µg/m³Dec 1113 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb26Moderate
Mar46Poor
Apr32Moderate
May23Moderate
Jun21Moderate
Jul21Moderate
Aug19Moderate
Sep16Moderate
Oct14Moderate
Nov13Moderate
Dec13Moderate
Location & terrain

Where is San Martín?

San Martín sits at 8.0°N, 73.5°W, 112 m above sea level, in Colombia. The nearest listed city is Ocaña, 31 km away.

Topography around San Martín

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

Within 3 km, the terrain around San Martín has only modest variations in elevation — a maximum elevation change of 53 m around an average of 105 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,315 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,956 m.

The land around San Martín is covered by grassland (63%) and trees (32%) within 3 km, grassland (58%) and trees (41%) within 16 km, and trees (58%) and grassland (40%) within 80 km.

3 km
53 m
16 km
1,315 m
80 km
3,956 m
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: Ocaña 31 km · Aguachica 36 km · Simití 48 km · Morales 50 km · Sabana de Torres 68 km · Puerto Wilches 84 km · El Zulia 101 km · Tiquisio 103 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 San Martín (8.0018°, -73.5114°, elevation 112 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).