San Gil weather in September

In September, San Gil sees average daytime highs of 23°C and overnight lows near 14°C, with 409 mm of rain across 30 wet days and about 12 hours of daylight. It is the 5th-warmest and 6th-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 September, and the air most often feels comfortable.

Daylight stretches from about 12 h 06 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is San Gil's 8th-clearest and 6th-windiest month. For the whole year in context, see San Gil's year-round climate.

Daytime high
23°
5th warmest
Overnight low
14°
5th coldest
Rainfall
409 mm
30 wet days
Daylight
12 hours
5:46 AM – 5:48 PM
Cloud cover
92%
8th clearest
Wind
3 km/h
6th windiest
Solar energy
5.48 kWh/m²
Travel score
3.4
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

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

A typical September day in San Gil reaches about 23°C in the afternoon and slips back to 14°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 25°C. Set against its neighbours, September runs on par with August and on par with October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12314
22314
32314
42314
52314
62314
72314
82314
92314
102314
112314
122314
132314
142314
152314
162314
172314
182314
192314
202314
212314
222314
232314
242314
252314
262314
272314
282314
292314
302314

San Gil weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan23° / 14°15626.811.74.2
Feb24° / 15°22125.511.84.0
Mar24° / 15°34730.6123.6
Apr24° / 15°41329.812.13.5
May24° / 15°47530.912.33.4
Jun23° / 15°4823012.43.4
Jul23° / 14°49230.912.33.4
Aug23° / 14°47430.912.23.4
Sep23° / 14°40930123.4
Oct23° / 15°4033111.93.4
Nov23° / 15°29829.811.73.4
Dec23° / 14°19228.711.63.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 1% of September, with mostly cloudy or overcast conditions the remaining 98%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1298
2298
3298
4298
5298
6298
7298
8298
9199
10199
11199
12199
13199
14199
15199
16199
17199
18199
19199
20199
21199
22199
23199
24199
25199
26199
27199
28199
29199
30199

Chance of precipitation in September

Any precipitation

San Gil gets around 409 mm of rain over 30 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 100% and peaks near 100% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 59% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)
16931
26931
36931
46832
56832
66733
76634
86535
96535
106436
116337
126238
136139
146040
155941
165842
175743
185644
195545
205545
215446
225446
235446
245347
255347
265248
275248
285149
295149
305050

Wind in September

Winds average 3 km/h in September.

Across September, 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 September

DaylightNight

Daylight runs from about 12 h 06 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over September. Sunrise moves from 5:48 AM to 5:43 AM, and sunset from 5:56 PM to 5:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.15:485:56
212.15:485:56
312.15:485:55
412.15:485:54
512.15:485:54
612.15:485:53
712.15:475:53
812.15:475:52
912.15:475:52
1012.15:475:51
1112.15:475:51
1212.15:475:50
1312.15:465:50
1412.05:465:49
1512.05:465:48
1612.05:465:48
1712.05:465:47
1812.05:455:47
1912.05:455:46
2012.05:455:46
2112.05:455:45
2212.05:455:45
2312.05:455:44
2412.05:445:44
2512.05:445:43
2612.05:445:42
2712.05:445:42
2812.05:445:41
2912.05:445:41
3011.95:435:40

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.48 kWh/m².

For context, solar energy here swings from a low near 4.77 kWh/m² to a high of 5.67 kWh/m² in February across the year — September's 5.48 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.4Bright
245.4Bright
255.4Bright
265.4Bright
275.4Bright
285.4Bright
295.3Bright
305.3Bright
Planning a trip in September

Is September a good time to visit San Gil?

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

3.4
Sightseeing
6th-best month of the year
2.8
Beach & pool
8th-best month of the year

September is a weaker month for outdoor sightseeing in San Gil.

What to pack for San Gil in September

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

In September, San Gil sees daytime highs around 23°C and nights near 14°C. Pack rain gear. Worth having: light clothes and sun protection. About 30 days see rain.

rain gearlight clothessun protection

UV index in San Gil in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 San Gil peaks around February 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 19UV 15Dec 13UV 11
UV index (midday)Level
Jan13Extreme
Feb16Extreme
Mar15Extreme
Apr13Extreme
May14Extreme
Jun13Extreme
Jul13Extreme
Aug13Extreme
Sep14Extreme
Oct13Extreme
Nov12Extreme
Dec11Extreme

Air quality in San Gil in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in San Gil is worst in March — around 40 µg/m³ PM2.5 (poor), about 2.3× the cleanest month (December, 18 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMar 1738 µg/m³Dec 1018 µg/m³
PM2.5 (µg/m³)Level
Jan21Moderate
Feb28Moderate
Mar40Poor
Apr29Moderate
May22Moderate
Jun20Moderate
Jul18Moderate
Aug18Moderate
Sep18Moderate
Oct18Moderate
Nov18Moderate
Dec18Moderate
Location & terrain

Where is San Gil?

San Gil sits at 6.6°N, 73.1°W, 1,152 m above sea level, in Colombia. The nearest listed city is Socorro, 17 km away.

Topography around San Gil

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

Within 3 km, the terrain around San Gil has large variations in elevation — a maximum elevation change of 694 m around an average of 1,326 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,755 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,399 m.

The land around San Gil is covered by grassland (50%) and trees (37%) within 3 km, grassland (53%) and trees (46%) within 16 km, and trees (57%) and grassland (41%) within 80 km.

3 km
694 m
16 km
1,755 m
80 km
4,399 m
treesshrubsgrasslandartificial surfaces
September weather nearby: Socorro 17 km · El Carmen de Chucurí 44 km · Málaga 47 km · Piedecuesta 49 km · Floridablanca 56 km · Girón 57 km · Bucaramanga 63 km · Duitama 83 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 Gil (6.5595°, -73.1364°, elevation 1,152 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).