Bulolo weather in September

In September, Bulolo sees average daytime highs of 22°C and overnight lows near 15°C, with 240 mm of rain across 24.6 wet days and about 12 hours of daylight. It is the 9th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 5% of the time in September, and the air most often feels humid.

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 Bulolo's 2nd-clearest and 2nd-windiest month. For the whole year in context, see Bulolo's year-round climate.

Daytime high
22°
9th warmest
Overnight low
15°
3rd coldest
Rainfall
240 mm
24.6 wet days
Daylight
12 hours
6:09 AM – 6:07 PM
Cloud cover
83%
2nd clearest
Wind
3 km/h
2nd windiest
Solar energy
4.72 kWh/m²
Travel score
4.1
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 22°C through the month.

A typical September day in Bulolo reaches about 22°C in the afternoon and slips back to 15°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 23°C. Set against its neighbours, September runs on par with August and on par with October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12115
22115
32115
42115
52115
62115
72115
82115
92115
102115
112215
122215
132215
142215
152215
162215
172215
182215
192215
202215
212215
222215
232215
242215
252215
262215
272215
282215
292215
302215

Bulolo weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 16°36426.712.44.0
Feb24° / 16°3202412.24.0
Mar24° / 16°38227.5123.9
Apr23° / 16°3092611.83.9
May22° / 15°2442611.74.1
Jun22° / 15°2042411.64.2
Jul21° / 15°19924.811.64.1
Aug21° / 15°21324.711.84.1
Sep22° / 15°24024.6124.1
Oct22° / 15°25325.512.24.1
Nov23° / 16°27125.812.34.0
Dec23° / 16°35927.712.43.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 5% 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 86%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11486
21585
31684
41684
51684
61684
71684
81684
91684
101684
111684
121684
131684
141684
151585
161585
171585
181585
191387
201387
211288
221189
231189
241189
251189
261189
271090
28991
29991
30991

Chance of precipitation in September

Any precipitation

Bulolo gets around 240 mm of rain over 24.6 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 82% and peaks near 86% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
181
280
380
480
580
680
780
880
980
1080
1180
1280
1381
1481
1582
1682
1783
1883
1983
2084
2184
2284
2384
2485
2585
2685
2785
2886
2986
3086

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 54% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
134750
234750
334750
434750
534750
644749
744749
844749
944749
1044749
1144750
1244650
1334651
1434552
1534552
1634453
1734354
1834354
1934255
2034156
2134156
2224058
2324058
2423959
2523959
2623860
2733859
2833760
2933760
3033661

Wind in September

Winds average 3 km/h in September.

Across September, daily wind ranges from about 3 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
173calm
183calm
193calm
203calm
213calm
223calm
233calm
243calm
253calm
263calm
273calm
283calm
293calm
303calm

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 6:17 AM to 6:01 AM, and sunset from 6:09 PM to 6:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:176:09
211.96:176:09
311.96:166:09
411.96:166:09
511.96:156:08
611.96:156:08
711.96:146:08
811.96:146:08
911.96:136:08
1011.96:126:08
1111.96:126:07
1211.96:116:07
1311.96:116:07
1411.96:106:07
1512.06:106:07
1612.06:096:07
1712.06:086:06
1812.06:086:06
1912.06:076:06
2012.06:076:06
2112.06:066:06
2212.06:056:06
2312.06:056:05
2412.06:046:05
2512.06:046:05
2612.06:036:05
2712.06:036:05
2812.06:026:05
2912.06:026:05
3012.16:016:04

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.72 kWh/m².

For context, solar energy here swings from a low near 3.75 kWh/m² to a high of 4.99 kWh/m² in October across the year — September's 4.72 kWh/m² sits near the top of that range.

024151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.5Bright
44.5Bright
54.5Bright
64.5Bright
74.5Bright
84.6Bright
94.6Bright
104.6Bright
114.6Bright
124.7Bright
134.7Bright
144.7Bright
154.7Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.9Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
295.0Bright
305.0Bright
Planning a trip in September

Hazard calendar for Bulolo

In seasonPeak

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

Bulolo 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 Bulolo?

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

4.1
Sightseeing
2nd-best month of the year
2.7
Beach & pool
10th-best month of the year

September is a reasonable time to visit Bulolo for sightseeing.

What to pack for Bulolo in September

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

In September, Bulolo sees daytime highs around 22°C and nights near 15°C. Pack rain gear. Worth having: sun protection. About 25 days see rain.

rain gearsun protection

Sea temperature near Bulolo 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 54 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 Bulolo in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 15 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Bulolo peaks around March 12 at about 17 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 12UV 17Jun 18UV 11
UV index (midday)Level
Jan16Extreme
Feb17Extreme
Mar17Extreme
Apr15Extreme
May13Extreme
Jun11Extreme
Jul12Extreme
Aug13Extreme
Sep15Extreme
Oct15Extreme
Nov14Extreme
Dec14Extreme
Location & terrain

Where is Bulolo?

Bulolo sits at 7.2°S, 146.6°E, 677 m above sea level, in Papua New Guinea. The nearest listed city is Lae, 66 km away.

GorokaMadangPopondettaPort MoresbyMount HagenMendiKimbe

Topography around Bulolo

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

Within 3 km, the terrain around Bulolo has significant variations in elevation — a maximum elevation change of 419 m around an average of 710 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,809 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,433 m.

The land around Bulolo is covered by trees (56%) and grassland (39%) within 3 km, trees (76%) and grassland (24%) within 16 km, and trees (79%) within 80 km.

3 km
419 m
16 km
1,809 m
80 km
3,433 m
treesgrasslandartificial surfacesbare terrainwater
September weather nearby: Lae 66 km · Goroka 186 km · Madang 240 km · Popondetta 247 km · Port Moresby 259 km · Mount Hagen 305 km · Mendi 350 km · Kimbe 428 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 Bulolo (-7.2036°, 146.6401°, elevation 677 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).