Papua New Guinea

Papua New Guinea Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Papua New Guinea in September.

Thinking about venturing to Papua New Guinea this September and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:

What to Expect in Papua New Guinea in September

September in Papua New Guinea generally has warm temperatures, with precipitation levels ranging from moderate to heavy.

Temperatures

The average maximum temperatures are warm and range from 22°C (72°F) in Mount Hagen to 30°C (86°F) in Port Moresby. Nighttime temperatures generally drop to 23°C (73°F) in Port Moresby and 12°C (54°F) in Mount Hagen. The temperatures cited for both day and night represent usual averages, but it's possible some days could be hotter. It's advisable to dress accordingly to handle the heat.

For a closer look at conditions across Papua New Guinea, refer to the map below.

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in Port Moresby with an average of 66 mm (2.6 in) to heavy rainfall in Erave with 516 mm (20 in).

Average sunshine

September brings good sunshine to many areas. Port Moresby sees around 215 hours of sunlight, great for visitors looking for bright days.

Explore Papua New Guinea by month

Best Places to Visit in Papua New Guinea in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Papua New Guinea.

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Papua New Guinea

What is the weather like in September for some of the most popular destinations in Papua New Guinea?

Temperature range in Papua New Guinea (September)

Precipitation variation in Papua New Guinea (September)

Port Moresby

In September Port Moresby generally has high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 23°C (73°F) and moderate monthly rainfall. So on average the conditions are pleasant that month.

August
September
October
Max temperature
29°C (84°F)
30°C (86°F)
30°C (86°F)
Min temperature
23°C (73°F)
23°C (73°F)
24°C (75°F)
Monthly sun hours
225 hours
215 hours
233 hours
Monthly rainfall
49 mm (1.9 in)
66 mm (2.6 in)
86 mm (3.4 in)
Monthly rainy days
6 days
7 days
7 days
Weather conditions

Madang

In September Madang generally has high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 24°C (75°F) and heavy monthly rainfall. So on average the conditions are tolerable that month.

August
September
October
Max temperature
29°C (84°F)
30°C (86°F)
30°C (86°F)
Min temperature
24°C (75°F)
24°C (75°F)
25°C (77°F)
Monthly sun hours
226 hours
216 hours
217 hours
Monthly rainfall
159 mm (6.3 in)
163 mm (6.4 in)
236 mm (9.3 in)
Monthly rainy days
14 days
14 days
19 days
Weather conditions

Kokopo

In September Kokopo generally has high temperatures with maximum daytime temperatures around 29°C (84°F), minimum nighttime temperatures around 25°C (77°F) and high monthly rainfall. So on average the conditions are pleasant that month.

August
September
October
Max temperature
28°C (82°F)
29°C (84°F)
29°C (84°F)
Min temperature
24°C (75°F)
25°C (77°F)
25°C (77°F)
Monthly sun hours
161 hours
195 hours
174 hours
Monthly rainfall
172 mm (6.8 in)
156 mm (6.1 in)
170 mm (6.7 in)
Monthly rainy days
19 days
19 days
21 days
Weather conditions

Lae

In September Lae generally has high temperatures with maximum daytime temperatures around 27°C (81°F), minimum nighttime temperatures around 22°C (72°F) and heavy monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
26°C (79°F)
27°C (81°F)
27°C (81°F)
Min temperature
22°C (72°F)
22°C (72°F)
23°C (73°F)
Monthly rainfall
522 mm (21 in)
483 mm (19 in)
505 mm (20 in)
Monthly rainy days
23 days
21 days
21 days
Weather conditions

Mount Hagen

In September Mount Hagen generally has high temperatures with maximum daytime temperatures around 22°C (72°F), minimum nighttime temperatures around 12°C (54°F) and heavy monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
22°C (72°F)
22°C (72°F)
22°C (72°F)
Min temperature
13°C (55°F)
12°C (54°F)
13°C (55°F)
Monthly rainfall
253 mm (10 in)
299 mm (12 in)
358 mm (14 in)
Monthly rainy days
22 days
22 days
22 days
Weather conditions

Is your destination not in the list? Have a look at all destinations in Papua New Guinea.

In our records: Papua New Guinea September extremes

Notable September records observed across cities in Papua New Guinea in our climate database (1988 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • In our records, the coldest September daytime high in Papua New Guinea was 17°C (63°F) in Goroka on September 22, 2025.

Popular cities in September

Day & night temperatures, rainfall and average weather in Papua New Guinea in September.

City Weather Day temp Night temp Rainfall
Port Moresby 30°C (86°F) 23°C (73°F) 66 mm (2.6 in)
Madang 30°C (86°F) 24°C (75°F) 163 mm (6.4 in)
Kokopo 29°C (84°F) 25°C (77°F) 156 mm (6.1 in)
Lae 27°C (81°F) 22°C (72°F) 483 mm (19 in)
Mount Hagen 22°C (72°F) 12°C (54°F) 299 mm (12 in)
Erave 25°C (77°F) 17°C (63°F) 516 mm (20 in)

Papua New Guinea weather in September: frequently asked questions

What is the weather like in Papua New Guinea in September?

September in Papua New Guinea brings tolerable weather. In Port Moresby, daytime temperatures are typically around 30°C (86°F) and nighttime lows hover near 23°C (73°F).

What is the average temperature in Papua New Guinea in September?

Daytime temperatures in Port Moresby peak at roughly 30°C (86°F) in September, dropping to about 23°C (73°F) overnight.

Does Papua New Guinea get a lot of rain in September?

September is on the drier side in Papua New Guinea. Port Moresby averages only about 66 mm (2.6 in), with most days staying dry.

Is September a Good Time to Visit Papua New Guinea?

Given the typically pleasant weather conditions in Port Moresby, September might be a good time to visit Papua New Guinea. It's worth noting that weather conditions might differ depending on the location you visit.

Generally speaking, July and August provide perfect weather in Port Moresby. On the other hand, the weather in January, February, March, April and December tend to be poor.

Interested in more climate information?

We have much more information about the climate in Papua New Guinea.

Weather and climate has detailed information for every country in the world. Are you going to Papua New Guinea? Get detailed historical weather averages for many cities in Papua New Guinea.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.