Lae weather in September

In September, Lae sees average daytime highs of 26°C and overnight lows near 23°C, with 466 mm of rain across 22.9 wet days and about 12 hours of daylight. It is the 10th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 10% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 54 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Lae's 1st-clearest and 2nd-windiest month. For the whole year in context, see Lae's year-round climate.

Daytime high
26°
10th warmest
Overnight low
23°
3rd coldest
Rainfall
466 mm
22.9 wet days
Daylight
12 hours
6:07 AM – 6:05 PM
Cloud cover
78%
1st clearest
Wind
5 km/h
2nd windiest
Solar energy
4.3 kWh/m²
Travel score
4.5
out of 10

Lae is city in Papua New Guinea.

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 26°C through the month.

A typical September day in Lae reaches about 26°C in the afternoon and slips back to 23°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 27°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)
12523
22523
32523
42523
52523
62523
72523
82523
92523
102523
112523
122523
132523
142523
152523
162623
172623
182623
192623
202623
212623
222623
232623
242623
252623
262623
272623
282623
292623
302623

Lae weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 24°57325.712.33.8
Feb28° / 24°42522.912.23.9
Mar27° / 24°61826.2123.8
Apr27° / 24°69724.411.94.0
May26° / 24°65224.411.74.2
Jun26° / 23°59223.611.64.3
Jul25° / 23°51824.811.64.3
Aug25° / 23°52525.111.84.4
Sep26° / 23°46622.9124.5
Oct26° / 23°48923.112.14.5
Nov27° / 24°58023.212.34.2
Dec27° / 24°68226.312.43.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 78%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12179
22278
32278
42278
52377
62476
72476
82377
92377
102476
112476
122476
132377
142377
152377
162377
172377
182377
192278
202278
212278
222278
232278
242080
252080
262080
272080
282080
292080
301981

Chance of precipitation in September

Any precipitation

Lae gets around 466 mm of rain over 22.9 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 77% and peaks near 78% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
178
277
377
477
576
676
776
876
976
1076
1176
1276
1376
1476
1576
1677
1777
1877
1977
2077
2177
2277
2377
2477
2577
2677
2777
2877
2977
3076

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 48% of days. Sticky, muggy-or-worse air turns up on roughly 95% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1145243
2145243
3145243
4155044
5155044
6155044
7155044
8155044
9155044
10155044
11055144
12055144
13055045
14055045
15054946
16054947
17054847
18044748
19044749
20044650
21044650
22044551
23044551
24044551
25044551
26034552
27034552
28034552
29034453
30034453

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 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
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 11 h 54 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 12 minutes over September. Sunrise moves from 6:16 AM to 6:00 AM, and sunset from 6:08 PM to 6:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:166:08
211.96:156:08
311.96:156:08
411.96:146:07
511.96:146:07
611.96:136:07
711.96:126:07
811.96:126:07
911.96:116:07
1011.96:116:06
1111.96:106:06
1211.96:106:06
1311.96:096:06
1412.06:096:06
1512.06:086:05
1612.06:076:05
1712.06:076:05
1812.06:066:05
1912.06:066:05
2012.06:056:05
2112.06:056:04
2212.06:046:04
2312.06:046:04
2412.06:036:04
2512.06:026:04
2612.06:026:03
2712.06:016:03
2812.06:016:03
2912.06:006:03
3012.16:006:03

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.3 kWh/m².

For context, solar energy here swings from a low near 3.28 kWh/m² to a high of 4.64 kWh/m² in October across the year — September's 4.3 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
13.9Moderate
24.0Moderate
34.0Moderate
44.0Bright
54.0Bright
64.1Bright
74.1Bright
84.1Bright
94.2Bright
104.2Bright
114.2Bright
124.2Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.3Bright
184.4Bright
194.4Bright
204.4Bright
214.4Bright
224.4Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.6Bright
304.6Bright
Planning a trip in September

Hazard calendar for Lae

In seasonPeak

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

Lae 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 Lae?

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

4.5
Sightseeing
1st-best month of the year
4.2
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Lae for sightseeing.

What to pack for Lae in September

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

In September, Lae sees daytime highs around 26°C and nights near 23°C. Pack rain gear. Worth having: light clothes. About 23 days see rain.

rain gearlight clothes

Sea temperature near Lae 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 22 km away) is warmest in January 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
May29Tropical
Jun29Tropical
Jul28Tropical
Aug28Warm
Sep28Tropical
Oct29Tropical
Nov30Tropical
Dec30Tropical

UV index in Lae 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 Lae peaks around March 10 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 10UV 16Jun 18UV 10
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar16Extreme
Apr14Extreme
May12Extreme
Jun10Extreme
Jul11Extreme
Aug12Extreme
Sep14Extreme
Oct15Extreme
Nov14Extreme
Dec14Extreme
Location & terrain

Where is Lae?

Lae sits at 6.7°S, 147.0°E, 44 m above sea level, in Papua New Guinea. The nearest listed city is Bulolo, 66 km away.

GorokaMadangPopondettaPort MoresbyMount HagenKimbeMendi

Topography around Lae

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

Within 3 km, the terrain around Lae has only modest variations in elevation — a maximum elevation change of 181 m around an average of 20 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,440 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,081 m.

The land around Lae is covered by trees (44%) and artificial surfaces (25%) within 3 km, trees (57%) and water (35%) within 16 km, and trees (69%) and water (22%) within 80 km.

3 km
181 m
16 km
1,440 m
80 km
4,081 m
treesgrasslandartificial surfacesbare terrainwatermangroves
September weather nearby: Bulolo 66 km · Goroka 191 km · Madang 214 km · Popondetta 265 km · Port Moresby 307 km · Mount Hagen 320 km · Kimbe 371 km · Mendi 375 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 Lae (-6.7233°, 146.9961°, elevation 44 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).