Guamo weather in September

In September, Guamo sees average daytime highs of 35°C and overnight lows near 23°C, with 59 mm of rain across 10 wet days and about 12 hours of daylight. It is the 2nd-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 2% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 06 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Guamo's 5th-clearest and 3rd-windiest month. For the whole year in context, see Guamo's year-round climate.

Daytime high
35°
2nd warmest
Overnight low
23°
10th coldest
Rainfall
59 mm
10 wet days
Daylight
12 hours
5:54 AM – 5:55 PM
Cloud cover
82%
5th clearest
Wind
5 km/h
3rd windiest
Solar energy
5.62 kWh/m²
Travel score
2.5
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 35°C through the month.

A typical September day in Guamo reaches about 35°C in the afternoon and slips back to 23°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 38°C. Set against its neighbours, September runs on par with August and about 2°C warmer than October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13523
23523
33523
43523
53523
63523
73523
83523
93523
103523
113523
123523
133523
143523
153523
163523
173523
183523
193523
203523
213423
223423
233423
243423
253423
263423
273423
283423
293423
303423

How September really feels in Guamo

Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Guamo weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 23°326.711.83.6
Feb34° / 24°488.611.93.1
Mar33° / 23°10415.5122.9
Apr32° / 23°18121.412.12.7
May32° / 23°1692112.22.8
Jun33° / 23°10214.312.23.0
Jul34° / 23°6411.112.22.9
Aug35° / 23°376.812.12.6
Sep35° / 23°5910122.5
Oct33° / 23°12117.311.92.9
Nov31° / 23°11918.611.83.3
Dec32° / 23°6911.711.83.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 9% of September, with mostly cloudy or overcast conditions the remaining 89%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11486
21486
31486
41486
51387
61387
71387
81387
91288
101288
111288
121288
131189
141189
151189
161189
171090
181090
191090
201090
21991
22991
23991
24991
25991
26991
27991
28991
29991
30892

Chance of precipitation in September

Any precipitation

Guamo gets around 59 mm of rain over 10 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 33% and peaks near 41% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
124
225
325
426
527
628
728
829
930
1031
1132
1232
1333
1434
1534
1635
1735
1835
1936
2036
2137
2237
2337
2438
2538
2638
2739
2839
2940
3041

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 54% of days. Sticky, muggy-or-worse air turns up on roughly 58% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
112037403
211937403
311937403
411837413
511737413
611637423
711637433
811537443
911437463
1011336473
1101235493
1201135513
1301134523
1401033543
150932563
160931573
170830593
180830593
190829603
200828613
210727624
220726634
230725644
240724654
250724645
260723655
270623656
280623647
290622657
300622648

Wind in September

Winds average 5 km/h in September.

Across September, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

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

Days shrink by about 6 minutes over September. Sunrise moves from 5:57 AM to 5:50 AM, and sunset from 6:02 PM to 5:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.15:576:02
212.15:576:01
312.15:576:01
412.15:576:01
512.15:566:00
612.15:566:00
712.15:565:59
812.15:565:59
912.05:555:58
1012.05:555:58
1112.05:555:57
1212.05:555:57
1312.05:545:56
1412.05:545:56
1512.05:545:55
1612.05:545:55
1712.05:535:54
1812.05:535:54
1912.05:535:53
2012.05:535:53
2112.05:525:52
2212.05:525:52
2312.05:525:51
2412.05:525:51
2512.05:515:51
2612.05:515:50
2712.05:515:50
2812.05:515:49
2912.05:505:49
3012.05:505:48

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.62 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.54 kWh/m² to a high of 5.62 kWh/m² in September across the year — September's 5.62 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.4Bright
305.4Bright
Planning a trip in September

Hazard calendar for Guamo

In seasonPeak

None of Guamo's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Guamo's rainy season runs March–June, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Guamo?

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

2.5
Sightseeing
12th-best month of the year
5.2
Beach & pool
6th-best month of the year

September is a weaker month for outdoor sightseeing in Guamo.

What to pack for Guamo in September

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

In September, Guamo sees daytime highs around 35°C and nights near 23°C. Pack light clothes. Worth having: rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

UV index in Guamo in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Guamo peaks around February 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 17UV 14Dec 15UV 10
UV index (midday)Level
Jan12Extreme
Feb14Extreme
Mar13Extreme
Apr10Extreme
May14Extreme
Jun13Extreme
Jul12Extreme
Aug11Extreme
Sep13Extreme
Oct13Extreme
Nov12Extreme
Dec10Very high

Air quality in Guamo 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 Guamo is worst in March — around 35 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (July, 14 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 1234 µg/m³Jul 1315 µg/m³
PM2.5 (µg/m³)Level
Jan23Moderate
Feb33Moderate
Mar35Moderate
Apr27Moderate
May19Moderate
Jun16Moderate
Jul14Moderate
Aug18Moderate
Sep22Moderate
Oct20Moderate
Nov22Moderate
Dec21Moderate
Location & terrain

Where is Guamo?

Guamo sits at 4.0°N, 75.0°W, 323 m above sea level, in Colombia. The nearest listed city is Espinal, 16 km away.

Topography around Guamo

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

Within 3 km, the terrain around Guamo has only modest variations in elevation — a maximum elevation change of 36 m around an average of 318 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 380 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,960 m.

The land around Guamo is covered by grassland (59%) and trees (32%) within 3 km, grassland (43%), cropland (30%) and trees (25%) within 16 km, and trees (56%) and grassland (38%) within 80 km.

3 km
36 m
16 km
380 m
80 km
4,960 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Espinal 16 km · Purificación 20 km · Payandé 33 km · Flandes 34 km · Girardot City 35 km · Rovira 38 km · Melgar 41 km · Natagaima 48 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 Guamo (4.0308°, -74.9701°, elevation 323 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).