Pago Pago weather in September

In September, Pago Pago sees average daytime highs of 27°C and overnight lows near 26°C, with 119 mm of rain across 17.9 wet days and about 11.9 hours of daylight. It is the 10th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 45% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 11 h 42 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Pago Pago's 3rd-clearest and 4th-windiest month. For the whole year in context, see Pago Pago's year-round climate.

Daytime high
27°
10th warmest
Overnight low
26°
2nd coldest
Rainfall
119 mm
17.9 wet days
Daylight
11 h 54 min
6:19 AM – 6:15 PM
Cloud cover
49%
3rd clearest
Wind
25 km/h
4th windiest
Solar energy
5.76 kWh/m²
Travel score
5.5
out of 10

Pago Pago is capital of American Samoa.

Density
81/km²
people per km²
Founded
1899

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 27°C through the month.

A typical September day in Pago Pago reaches about 27°C in the afternoon and slips back to 26°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 28°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)
12726
22726
32726
42726
52726
62726
72726
82726
92726
102726
112726
122726
132726
142726
152726
162726
172726
182726
192726
202726
212726
222726
232726
242726
252726
262726
272726
282726
292726
302726

How September really feels in Pago Pago

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.

Pago Pago weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 26°36126.112.83.9
Feb28° / 26°29123.912.53.9
Mar28° / 26°25125.612.13.9
Apr28° / 26°20523.711.74.1
May28° / 26°19121.611.34.8
Jun27° / 26°11518.311.25.3
Jul27° / 26°10717.511.25.7
Aug27° / 26°9216.311.55.8
Sep27° / 26°11917.911.95.5
Oct27° / 26°19320.612.35.0
Nov28° / 26°23123.712.74.3
Dec28° / 26°30924.912.84.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 22% of September, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17030
27129
37129
47129
57129
67129
77129
87030
97030
107030
117030
126931
136832
146832
156832
166733
176634
186535
196535
206436
216436
226436
236436
246337
256337
266337
276337
286238
296139
306139

Chance of precipitation in September

Any precipitation

Pago Pago gets around 119 mm of rain over 17.9 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 59% and peaks near 63% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
152
253
353
454
554
655
756
856
957
1057
1158
1258
1359
1459
1559
1660
1760
1861
1961
2062
2162
2262
2362
2462
2563
2663
2763
2862
2962
3062

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 87% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1213823
2112843
3112843
4111853
5111853
6110854
719864
819864
918874
1018874
1117884
1217884
1316894
1416894
1516885
1615895
1715895
1815895
1915886
2015886
2115886
2215886
2315877
2415877
2515877
2615877
2715877
2815877
2915877
3015877

Wind in September

Winds average 25 km/h in September.

Across September, daily wind ranges from about 24 km/h on the calmest days to 26 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202530
Wind speed (km/h)Feels
126breezy
226breezy
326breezy
426breezy
526breezy
626breezy
726breezy
826breezy
926breezy
1026breezy
1126breezy
1226breezy
1326breezy
1426breezy
1526breezy
1626breezy
1726breezy
1825breezy
1925breezy
2025breezy
2125breezy
2225breezy
2325breezy
2425breezy
2525breezy
2625breezy
2725breezy
2825breezy
2925breezy
3024breezy

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 42 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over September. Sunrise moves from 6:31 AM to 6:09 AM, and sunset from 6:14 PM to 6:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:316:14
211.76:306:14
311.76:296:14
411.86:296:14
511.86:286:14
611.86:276:14
711.86:266:14
811.86:266:14
911.86:256:15
1011.86:246:15
1111.96:236:15
1211.96:236:15
1311.96:226:15
1411.96:216:15
1511.96:206:15
1611.96:196:15
1711.96:196:15
1811.96:186:15
1912.06:176:15
2012.06:166:15
2112.06:166:15
2212.06:156:15
2312.06:146:15
2412.06:136:15
2512.06:136:15
2612.16:126:15
2712.16:116:15
2812.16:106:15
2912.16:096:15
3012.16:096:16

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.76 kWh/m².

For context, solar energy here swings from a low near 4.28 kWh/m² to a high of 6.14 kWh/m² in December across the year — September's 5.76 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
286.0Bright
296.0Bright
306.0Bright
Planning a trip in September

Is September a good time to visit Pago Pago?

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

5.5
Sightseeing
3rd-best month of the year
5.6
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Pago Pago for sightseeing.

What to pack for Pago Pago in September

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

In September, Pago Pago sees daytime highs around 27°C and nights near 26°C. Pack rain gear. Worth having: light clothes, sun protection and a windbreaker. About 18 days see rain.

rain gearlight clothessun protectiona windbreaker

Sea temperature near Pago Pago in September

The nearest coast averages about 28°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 14 km away) is warmest in March at about 29°C and coldest in August near 28°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
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun28Tropical
Jul28Warm
Aug28Warm
Sep28Warm
Oct28Tropical
Nov29Tropical
Dec29Tropical

UV index in Pago Pago 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 Pago Pago peaks around February 14 at about 17 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 14UV 17Jun 20UV 8
UV index (midday)Level
Jan16Extreme
Feb18Extreme
Mar15Extreme
Apr12Extreme
May10Very high
Jun8Very high
Jul9Very high
Aug11Extreme
Sep14Extreme
Oct14Extreme
Nov14Extreme
Dec13Extreme
Location & terrain

Where is Pago Pago?

Pago Pago sits at 14.3°S, 170.7°W, 2 m above sea level, in American Samoa. The nearest listed city is Apia, 125 km away.

Topography around Pago Pago

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

Within 3 km, the terrain around Pago Pago has significant variations in elevation — a maximum elevation change of 577 m around an average of 130 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 582 m; within 80 km, significant variations in elevation — a maximum elevation change of 552 m.

The land around Pago Pago is covered by trees (63%) and water (30%) within 3 km, water (83%) within 16 km, and water (98%) within 80 km.

3 km
577 m
16 km
582 m
80 km
552 m
treesgrasslandartificial surfaceswater
September weather nearby: Apia 125 km · Alofi 537 km · Mata-Utu 601 km · Nuku‘alofa 899 km · Labasa 1,092 km · Levuka 1,146 km · Nasinu 1,226 km · Suva 1,237 km

American Samoa travel facts

Power plugs
Type A / B / I
120 V · 60 Hz
GDP per capita
$18,017
2022
Safe drinking water
91%
of population, 2024
Homicide rate
25.5
per 100k, 2018
Income group
High
World Bank
Religion
Christian 98%

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 Pago Pago (-14.2781°, -170.7025°, elevation 2 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).