San Lorenzo weather in May

In May, San Lorenzo sees average daytime highs of 23°C and overnight lows near 15°C, with 392 mm of rain across 29.1 wet days and about 12.1 hours of daylight. It is the 5th-warmest and 4th-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 May, and the air most often feels comfortable.

Daylight stretches from about 12 h 06 min at the start of May to 12 h 06 min by month's end. Set against the rest of the year, May is San Lorenzo's 9th-clearest and 10th-windiest month. For the whole year in context, see San Lorenzo's year-round climate.

Daytime high
23°
5th warmest
Overnight low
15°
12th coldest
Rainfall
392 mm
29.1 wet days
Daylight
12 h 06 min
6:03 AM – 6:07 PM
Cloud cover
89%
9th clearest
Wind
3 km/h
10th windiest
Solar energy
4.74 kWh/m²
Travel score
3.6
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

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

A typical May day in San Lorenzo reaches about 23°C in the afternoon and slips back to 15°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 25°C. Set against its neighbours, May runs on par with April and on par with June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
12315
22315
32315
42315
52315
62315
72315
82315
92315
102315
112315
122315
132315
142315
152315
162315
172315
182315
192315
202315
212315
222315
232315
242315
252315
262315
272315
282315
292315
302315
312315

San Lorenzo weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 15°34229.211.93.7
Feb23° / 15°34326.3123.6
Mar23° / 15°40129.6123.6
Apr23° / 15°44129.3123.5
May23° / 15°39229.112.13.6
Jun23° / 15°27024.312.14.3
Jul24° / 15°18120.112.15.2
Aug24° / 15°14718.4125.4
Sep24° / 15°25824.5124.3
Oct23° / 15°38129.6123.6
Nov22° / 15°39328.911.93.4
Dec22° / 15°38829.611.93.6

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 3% of May, with mostly cloudy or overcast conditions the remaining 96%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1397
2397
3397
4397
5397
6397
7397
8397
9298
10298
11298
12298
13397
14397
15397
16397
17397
18397
19397
20397
21496
22496
23496
24496
25496
26496
27595
28595
29595
30694
31793

Chance of precipitation in May

Any precipitation

San Lorenzo gets around 392 mm of rain over 29.1 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 94% and peaks near 97% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
197
297
396
496
596
695
795
895
994
1094
1194
1294
1394
1494
1593
1693
1793
1893
1993
2093
2193
2293
2393
2493
2593
2693
2793
2893
2992
3092
3192

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 53% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
104456
204555
304555
404654
504753
604753
704852
804852
904951
1004951
1104951
1204951
1305050
1405050
1505149
1605149
1705248
1805347
1905446
2005446
2115445
2215544
2315643
2415841
2515940
2616039
2716138
2816336
2926335
3026434
3126533

Wind in May

Winds average 3 km/h in May.

Across May, 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.

0246810151015202531
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
313calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 06 min at the start of May to 12 h 06 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 6:05 AM to 6:04 AM, and sunset from 6:08 PM to 6:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:056:08
212.16:046:08
312.16:046:07
412.16:046:07
512.16:046:07
612.16:046:07
712.16:046:07
812.16:046:07
912.16:036:07
1012.16:036:07
1112.16:036:07
1212.16:036:07
1312.16:036:07
1412.16:036:07
1512.16:036:07
1612.16:036:07
1712.16:036:07
1812.16:036:07
1912.16:036:07
2012.16:036:07
2112.16:036:07
2212.16:036:08
2312.16:036:08
2412.16:036:08
2512.16:036:08
2612.16:036:08
2712.16:036:08
2812.16:046:08
2912.16:046:08
3012.16:046:08
3112.16:046:09

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.74 kWh/m².

For context, solar energy here swings from a low near 4.51 kWh/m² to a high of 5.59 kWh/m² in September across the year — May's 4.74 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.7Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
314.7Bright
Planning a trip in May

Is May a good time to visit San Lorenzo?

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

3.6
Sightseeing
6th-best month of the year
2.8
Beach & pool
5th-best month of the year

May is a weaker month for outdoor sightseeing in San Lorenzo.

What to pack for San Lorenzo in May

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

In May, San Lorenzo sees daytime highs around 23°C and nights near 15°C. Pack rain gear. Worth having: light clothes and sun protection. About 29 days see rain.

rain gearlight clothessun protection

UV index in San Lorenzo in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 15 (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 Lorenzo peaks around February 19 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 24 at about 12 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 19UV 16Jul 24UV 12
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar16Extreme
Apr14Extreme
May15Extreme
Jun13Extreme
Jul12Extreme
Aug12Extreme
Sep14Extreme
Oct14Extreme
Nov13Extreme
Dec13Extreme

Air quality in San Lorenzo 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 San Lorenzo is worst in March — around 18 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (July, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateMar 1218 µg/m³Jul 1111 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb18Moderate
Mar18Moderate
Apr16Moderate
May13Moderate
Jun11Good
Jul11Good
Aug14Moderate
Sep17Moderate
Oct15Moderate
Nov14Moderate
Dec14Moderate
Location & terrain

Where is San Lorenzo?

San Lorenzo sits at 1.5°N, 77.2°W, 2,074 m above sea level, in Colombia. The nearest listed city is La Unión, 15 km away.

Topography around San Lorenzo

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

Within 3 km, the terrain around San Lorenzo has very significant variations in elevation — a maximum elevation change of 1,424 m around an average of 2,225 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,258 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,121 m.

The land around San Lorenzo is covered by trees (63%) and grassland (35%) within 3 km, trees (51%) and grassland (48%) within 16 km, and trees (76%) and grassland (23%) within 80 km.

3 km
1,424 m
16 km
2,258 m
80 km
4,121 m
treesshrubsgrasslandartificial surfaces
May weather nearby: La Unión 15 km · Buesaco 15 km · Providencia 29 km · Pasto 33 km · Samaniego 46 km · Balboa 60 km · Túquerres 64 km · Patía 65 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 Lorenzo (1.5029°, -77.2154°, elevation 2,074 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).