Port Moresby, Papua New Guinea Climate & Monthly Averages
The climate of Port Moresby
Port Moresby has a tropical wet-and-dry climate, marked by year-round warmth split between a rainy season and a pronounced dry season. Average daytime highs range from about 84°F (29°C) in August to around 88°F (31°C) in December, and the city records roughly 195 days of measurable precipitation a year.
Climate quick facts
- Hottest month: December - highs near 88°F (31°C)
- Coldest month: August - highs near 84°F (29°C)
- Record high: 95°F (35°C) · Record low: 63°F (17°C) (2015–2024)
- Wettest month: March (24 rainy days) · Sunniest: November (11.1 h sun/day)
- Climate type: tropical wet-and-dry - year-round warmth split between a rainy season and a pronounced dry season
Temperatures through the year
The warmest stretch of the year centers on December. Highs average 88°F (31°C) and overnight lows stay near 76°F (24°C). The coolest month is August, with typical highs of 84°F (29°C) and lows around 74°F (23°C). Based on 2015–2024 weather data, temperatures have reached as high as 95°F (35°C) and dropped as low as 63°F (17°C).
Rain, sun and snow
March is usually the wettest month. It brings about 11.7 inches (297 mm) of rain over 24 days, while August is the driest. November brings the most sunshine, averaging 11.1 hours of sun a day.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 87° | 76° | 21 | 10.7 in | 9.2 h/day | 82% |
| February | 87° | 76° | 20 | 8.1 in | 9.4 h/day | 82% |
| March | 86° | 75° | 24 | 11.7 in | 8.9 h/day | 85% |
| April | 85° | 75° | 22 | 8.4 in | 9.2 h/day | 87% |
| May | 85° | 76° | 14 | 4.8 in | 9.9 h/day | 85% |
| June | 84° | 75° | 11 | 2.3 in | 10.1 h/day | 82% |
| July | 84° | 74° | 10 | 1.9 in | 10.2 h/day | 80% |
| August | 84° | 74° | 10 | 1.8 in | 10.3 h/day | 79% |
| September | 85° | 74° | 12 | 2.6 in | 10.4 h/day | 79% |
| October | 86° | 75° | 16 | 4.1 in | 10.8 h/day | 82% |
| November | 87° | 76° | 15 | 3.6 in | 11.1 h/day | 81% |
| December | 88° | 76° | 20 | 6.7 in | 10.1 h/day | 82% |
Port Moresby month by month
Port Moresby weather in January
January brings highs around 87°F (31°C), lows near 76°F (24°C), about 21 wet days.
Port Moresby weather in February
February brings highs around 87°F (30°C), lows near 76°F (24°C), about 20 wet days.
Port Moresby weather in March
March brings highs around 86°F (30°C), lows near 75°F (24°C), about 24 wet days - typically the wettest month of the year in Port Moresby.
Port Moresby weather in April
April brings highs around 85°F (30°C), lows near 75°F (24°C), about 22 wet days.
Port Moresby weather in May
May brings highs around 85°F (30°C), lows near 76°F (24°C), about 14 wet days.
Port Moresby weather in June
June brings highs around 84°F (29°C), lows near 75°F (24°C), about 11 wet days.
Port Moresby weather in July
July brings highs around 84°F (29°C), lows near 74°F (23°C), about 10 wet days.
Port Moresby weather in August
August brings highs around 84°F (29°C), lows near 74°F (23°C), about 10 wet days - typically the coldest month and the driest month of the year in Port Moresby.
Port Moresby weather in September
September brings highs around 85°F (30°C), lows near 74°F (24°C), about 12 wet days.
Port Moresby weather in October
October brings highs around 86°F (30°C), lows near 75°F (24°C), about 16 wet days.
Port Moresby weather in November
November brings highs around 87°F (31°C), lows near 76°F (24°C), about 15 wet days - typically the sunniest month of the year in Port Moresby.
Port Moresby weather in December
December brings highs around 88°F (31°C), lows near 76°F (24°C), about 20 wet days - typically the hottest month of the year in Port Moresby.
Seasons in Port Moresby
September through November
September through November in Port Moresby runs hot, with daytime highs averaging 86°F (30°C) and nights around 75°F (24°C); expect showers on roughly 43 days across the season. With the humidity factored in, afternoons often feel hotter than the thermometer reads - run the numbers through the humidity and dew point converter to see why.
December through February
December through February in Port Moresby is hot, with daytime highs averaging 87°F (31°C) and nights around 76°F (24°C); expect showers on roughly 60 days across the season.
March through May
March through May in Port Moresby is hot, with daytime highs averaging 86°F (30°C) and nights around 75°F (24°C); expect showers on roughly 61 days across the season.
June through August
June through August in Port Moresby runs hot, with daytime highs averaging 84°F (29°C) and nights around 74°F (24°C); expect showers on roughly 30 days across the season.
Climate questions, answered
What is the average temperature in Port Moresby?
Is Port Moresby hot in summer?
Is Port Moresby cold in winter?
How many rainy days does Port Moresby get in a year?
Best time to visit Port Moresby
The best time to visit Port Moresby is generally June to September, when these months combine the driest skies with the most comfortable heat. Daytime temperatures in that window typically sit near 84°F (29°C).
Pack for Port Moresby with lightweight, breathable clothing and strong sun protection for the hot months; a compact umbrella or rain shell - showers are a regular feature; moisture-wicking fabrics to cope with the humidity. Evenings can feel noticeably cooler than afternoons - December nights average 76°F (24°C).
Port Moresby temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.