Kokopo weather in September

In September, Kokopo sees average daytime highs of 28°C and overnight lows near 26°C, with 108 mm of rain across 15 wet days and about 12 hours of daylight. It is the 10th-warmest and 12th-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 18% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Kokopo's 2nd-clearest and 3rd-windiest month. For the whole year in context, see Kokopo's year-round climate.

Daytime high
28°
10th warmest
Overnight low
26°
3rd coldest
Rainfall
108 mm
15 wet days
Daylight
12 hours
5:46 AM – 5:45 PM
Cloud cover
72%
2nd clearest
Wind
15 km/h
3rd windiest
Solar energy
5.25 kWh/m²
Travel score
5.4
out of 10

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 Kokopo reaches about 28°C in the afternoon and slips back to 26°C overnight — a 2°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
162826
172826
182826
192826
202826
212826
222826
232826
242826
252826
262826
272826
282826
292826
302826

How September really feels in Kokopo

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.

Kokopo weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 26°27925.812.23.6
Feb28° / 26°25323.712.13.5
Mar28° / 26°29226123.6
Apr28° / 26°23524.911.93.7
May28° / 26°17221.411.84.3
Jun28° / 26°12016.811.85.1
Jul27° / 26°14016.811.85.2
Aug27° / 25°13013.411.95.7
Sep28° / 26°10815125.4
Oct28° / 26°12817.512.14.8
Nov28° / 26°17321.412.24.1
Dec28° / 26°26326.612.23.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 68%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13268
23169
33070
43070
53070
63070
73169
83070
93070
103070
113169
123169
133268
143367
153466
163466
173466
183466
193466
203466
213466
223466
233367
243367
253268
263268
273169
283070
292971
302971

Chance of precipitation in September

Any precipitation

Kokopo gets around 108 mm of rain over 15 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 49% and peaks near 50% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
148
248
349
449
549
649
750
850
950
1050
1149
1249
1349
1449
1549
1648
1748
1849
1949
2049
2149
2249
2349
2449
2549
2650
2750
2850
2950
3050

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 93% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
14942
24942
34942
44933
54933
64933
74933
84933
94933
104933
114933
124933
134933
144933
154924
164924
173934
183934
193934
202935
212935
222935
232935
241945
251936
261936
271936
281927
291927
301927

Wind in September

Winds average 15 km/h in September.

Across September, daily wind ranges from about 14 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

Sunrise & sunset in September

DaylightNight

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

Days grow by about 6 minutes over September. Sunrise moves from 5:53 AM to 5:39 AM, and sunset from 5:48 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:535:48
211.95:535:48
311.95:525:48
411.95:525:47
511.95:515:47
611.95:515:47
711.95:505:47
811.95:505:47
911.95:495:46
1012.05:495:46
1112.05:485:46
1212.05:485:46
1312.05:475:45
1412.05:475:45
1512.05:465:45
1612.05:465:45
1712.05:455:44
1812.05:455:44
1912.05:445:44
2012.05:445:44
2112.05:435:43
2212.05:435:43
2312.05:435:43
2412.05:425:43
2512.05:425:42
2612.05:415:42
2712.05:415:42
2812.05:405:42
2912.05:405:41
3012.05:395:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.25 kWh/m².

For context, solar energy here swings from a low near 4.23 kWh/m² to a high of 5.47 kWh/m² in October across the year — September's 5.25 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.4Bright
285.4Bright
295.4Bright
305.4Bright
Planning a trip in September

Hazard calendar for Kokopo

In seasonPeak

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

Kokopo sits in the South Indian Ocean cyclone belt; the season peaks January–March.

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

Is September a good time to visit Kokopo?

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

5.4
Sightseeing
2nd-best month of the year
5.8
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Kokopo for sightseeing.

What to pack for Kokopo in September

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

In September, Kokopo sees daytime highs around 28°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 15 days see rain.

light clothesrain gearsun protection

Sea temperature near Kokopo 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 December at about 30°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°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan30Tropical
Feb30Tropical
Mar30Tropical
Apr30Tropical
May30Tropical
Jun29Tropical
Jul29Tropical
Aug28Tropical
Sep29Tropical
Oct29Tropical
Nov30Tropical
Dec30Tropical

UV index in Kokopo 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 Kokopo peaks around March 13 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 13UV 16Jun 21UV 11
UV index (midday)Level
Jan14Extreme
Feb16Extreme
Mar17Extreme
Apr15Extreme
May13Extreme
Jun11Extreme
Jul11Extreme
Aug12Extreme
Sep14Extreme
Oct14Extreme
Nov13Extreme
Dec13Extreme

Air quality in Kokopo 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 Kokopo is worst in December — around 42 µg/m³ PM2.5 (poor), about 1.7× the cleanest month (August, 25 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModeratePoorDec 1342 µg/m³Aug 1425 µg/m³
PM2.5 (µg/m³)Level
Jan33Moderate
Feb33Moderate
Mar40Poor
Apr41Poor
May37Poor
Jun29Moderate
Jul26Moderate
Aug25Moderate
Sep27Moderate
Oct34Moderate
Nov39Poor
Dec42Poor
Location & terrain

Where is Kokopo?

Kokopo sits at 4.3°S, 152.3°E, 22 m above sea level, in Papua New Guinea. The nearest listed city is Kimbe, 272 km away.

KimbeArawaLaePopondettaBuloloMadangGorokaPort Moresby

Topography around Kokopo

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

Within 3 km, the terrain around Kokopo has only modest variations in elevation — a maximum elevation change of 146 m around an average of 43 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 658 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,286 m.

The land around Kokopo is covered by trees (48%) and water (37%) within 3 km, trees (54%) and water (42%) within 16 km, and water (51%) and trees (48%) within 80 km.

3 km
146 m
16 km
658 m
80 km
2,286 m
treesgrasslandartificial surfaceswater
September weather nearby: Kimbe 272 km · Arawa 421 km · Lae 641 km · Popondetta 664 km · Bulolo 699 km · Madang 725 km · Goroka 786 km · Port Moresby 803 km

Papua New Guinea travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type I
240 V · 50 Hz
Prices
≈ 58% of US
price level, 2025
GDP per capita
$3,020
2025
Homicide rate
9.3
per 100k, 2010
Road deaths
12.6
per 100k/yr, 2019
Income group
Lower middle
World Bank
Religion
Protestant 64%Roman Catholic 26%other Christian 5%non-Christian 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 Kokopo (-4.3432°, 152.2687°, elevation 22 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).