Portobelo weather in September

In September, Portobelo sees average daytime highs of 28°C and overnight lows near 25°C, with 296 mm of rain across 29.8 wet days and about 12.1 hours of daylight. It is the 3rd-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 0% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 12 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Portobelo's 9th-clearest and 12th-windiest month. For the whole year in context, see Portobelo's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
25°
8th coldest
Rainfall
296 mm
29.8 wet days
Daylight
12 h 06 min
6:11 AM – 6:15 PM
Cloud cover
91%
9th clearest
Wind
7 km/h
12th windiest
Solar energy
4.58 kWh/m²
Travel score
3.2
out of 10

Portobelo is port city and corregimiento in Portobelo District, Colón Province, Panama.

Founded
1597

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

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

A typical September day in Portobelo reaches about 28°C in the afternoon and slips back to 25°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, September runs on par with August and on par with October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12825
22825
32825
42825
52825
62825
72825
82825
92825
102825
112825
122825
132825
142825
152825
162825
172825
182825
192825
202825
212825
222825
232825
242825
252825
262825
272825
282825
292825
302825

How September really feels in Portobelo

Once humidity and wind are folded in, September averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Portobelo weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 24°6416.211.55.7
Feb27° / 24°4012.111.76.2
Mar27° / 24°4314.211.96.0
Apr28° / 25°10320.612.24.7
May28° / 25°26529.712.43.2
Jun28° / 25°30129.312.53.0
Jul28° / 25°32530.312.53.2
Aug28° / 25°32330.512.33.2
Sep28° / 25°29629.812.13.2
Oct28° / 25°3113011.83.3
Nov27° / 24°33928.911.63.5
Dec27° / 24°18124.911.54.3

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 2% 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
9298
10298
11298
12298
13298
14298
15298
16298
17397
18397
19397
20397
21397
22397
23397
24397
25397
26397
27397
28397
29397
30496

Chance of precipitation in September

Any precipitation

Portobelo gets around 296 mm of rain over 29.8 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 99% and peaks near 99% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
199
299
399
499
599
699
799
899
999
1099
1199
1299
1399
1499
1599
1699
1799
1899
1999
2099
2199
2299
2399
2499
2599
2699
2799
2898
2998
3098

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 75% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
17228
27228
37228
47228
57228
67228
77228
87327
97327
107327
117426
127426
137525
147525
157525
167624
177624
187624
197723
207723
217723
227723
237723
247822
257822
267822
277822
287822
297822
307822

Wind in September

Winds average 7 km/h in September, the calmest month.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
278calm
288calm
298calm
308calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 12 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 18 minutes over September. Sunrise moves from 6:13 AM to 6:10 AM, and sunset from 6:24 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:136:24
212.26:136:23
312.26:136:23
412.26:136:22
512.26:126:21
612.16:126:21
712.16:126:20
812.16:126:20
912.16:126:19
1012.16:126:18
1112.16:126:18
1212.16:126:17
1312.16:126:16
1412.16:126:16
1512.16:116:15
1612.16:116:15
1712.06:116:14
1812.06:116:13
1912.06:116:13
2012.06:116:12
2112.06:116:11
2212.06:116:11
2312.06:116:10
2412.06:116:09
2512.06:116:09
2612.06:106:08
2712.06:106:08
2811.96:106:07
2911.96:106:06
3011.96:106:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.58 kWh/m².

For context, solar energy here swings from a low near 3.9 kWh/m² to a high of 5.67 kWh/m² in March across the year — September's 4.58 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.6Bright
44.6Bright
54.6Bright
64.6Bright
74.6Bright
84.6Bright
94.6Bright
104.6Bright
114.6Bright
124.6Bright
134.6Bright
144.6Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.6Bright
204.6Bright
214.6Bright
224.6Bright
234.6Bright
244.6Bright
254.6Bright
264.6Bright
274.6Bright
284.6Bright
294.6Bright
304.6Bright
Planning a trip in September

Is September a good time to visit Portobelo?

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

3.2
Sightseeing
8th-best month of the year
3.5
Beach & pool
11th-best month of the year

September is a weaker month for outdoor sightseeing in Portobelo.

What to pack for Portobelo in September

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

In September, Portobelo sees daytime highs around 28°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 30 days see rain.

light clothesrain gearsun protection

Sea temperature near Portobelo in September

The nearest coast averages about 29°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in October at about 29°C and coldest in February near 27°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr28Warm
May28Tropical
Jun29Tropical
Jul28Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec28Warm

UV index in Portobelo in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Portobelo peaks around March 22 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 22UV 13Dec 15UV 10
UV index (midday)Level
Jan11Extreme
Feb12Extreme
Mar13Extreme
Apr13Extreme
May12Extreme
Jun13Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec10Very high

Air quality in Portobelo 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 Portobelo is worst in July — around 29 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (November, 13 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJul 1529 µg/m³Nov 1413 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb18Moderate
Mar18Moderate
Apr23Moderate
May26Moderate
Jun25Moderate
Jul29Moderate
Aug23Moderate
Sep17Moderate
Oct14Moderate
Nov13Moderate
Dec15Moderate
Location & terrain

Where is Portobelo?

Portobelo sits at 9.6°N, 79.7°W, 0 m above sea level, in Panama. The nearest listed city is Sabanitas, 28 km away.

ChilibreAlcalde DíazLa CabimaLas CumbresNuevo Belén

Topography around Portobelo

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

Within 3 km, the terrain around Portobelo has significant variations in elevation — a maximum elevation change of 256 m around an average of 36 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 978 m; within 80 km, large variations in elevation — a maximum elevation change of 1,009 m.

The land around Portobelo is covered by trees (43%), grassland (31%) and water (22%) within 3 km, water (51%) and trees (33%) within 16 km, and water (50%) and trees (38%) within 80 km.

3 km
256 m
16 km
978 m
80 km
1,009 m
treesgrasslandartificial surfaceswatermangroves
September weather nearby: Sabanitas 28 km · Cativá 29 km · Colon 34 km · Chilibre 45 km · Alcalde Díaz 49 km · La Cabima 50 km · Las Cumbres 53 km · Nuevo Belén 59 km

Panama travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B
110 V · 60 Hz
Prices
≈ 45% of US
price level, 2025
GDP per capita
$19,790
2025
Happiness
6.5 / 10
World Happiness, 2025
Homicide rate
11.7
per 100k, 2023
Road deaths
13.9
per 100k/yr, 2019
Income group
High
World Bank
English
Low
EF EPI 491
Religion
Evangelical 55%Roman Catholic 33%none 10%

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 Portobelo (9.553°, -79.6569°, elevation 0 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).