Port Moresby, Papua New Guinea Weather
Port Moresby hourly forecast: next 24 hours
Today's high of 79°F (26°C) is about 6°F (3°C) below the typical September high of 85°F (30°C).
Current conditions in detail
Port Moresby weather tomorrow (Thursday, September 17)
Tomorrow in Port Moresby looks cloudy, with a high of 80° and an overnight low of 71°. Rain is unlikely (14% chance). Winds top out near 19 mph, and the UV index reaches 12 (extreme).
Port Moresby 14-day forecast
About the weather in Port Moresby
There is not much of a seasonal calendar in Port Moresby. Its warmest and coolest months differ by 2°C, against a dataset median nearer 15°C, which leaves 88°F (31°C) in December and 84°F (29°C) in August as the two ends of the year.
Port Moresby weather: quick facts
- Hottest month: December - highs near 88°F (31°C)
- Coldest month: August - highs near 84°F (29°C)
- Decade extremes (2015-2024): 95°F (35°C) high · 63°F (17°C) low
- Wettest month: March (24 rainy days) · Sunniest: November (11.1 h sun/day)
- Climate type: tropical wet-and-dry
- Annual swing: 2°C between the average warmest and coolest month · day to night: 6°C
- Months averaging 30°C or hotter: 6
- Average humidity: 82%
Temperatures through the year
August is the coolest month, with highs of 84°F (29°C) and lows near 74°F (23°C). Warmth peaks in December: highs of 88°F (31°C), lows of 76°F (24°C). The gridded 2015-2024 daily record for this location tops out at 95°F (35°C) and bottoms at 63°F (17°C) - decade extremes, not all-time station records. Between the average December and the average August lie 2°C, a narrower spread than all but 4% of the 3496 cities in our dataset.
Rain, sun and snow
Average highs hold at or above 30°C for 6 months of the year, October through March being the unbroken run. Days and nights are about 6°C apart on average - narrower than all but 8% of the 3496 cities in our dataset. Relative humidity averages 82% across the year, more humid than 92% of the 3496 cities in our dataset - enough that summer afternoons feel hotter than the thermometer says, which is what the dew point converter is for.
Season by season
September through November
Through September through November, Port Moresby runs hot: 86°F (30°C) by day, 75°F (24°C) after dark, and rain falls on around 43 of the 90 days. Daylight is generous - around 10.8 hours of sun a day.
December through February
Through December through February, Port Moresby brings hot afternoons: 87°F (31°C) by day, 76°F (24°C) after dark, and rain falls on around 60 of the 90 days.
March through May
Through March through May, Port Moresby sits firmly in the heat: 86°F (30°C) by day, 75°F (24°C) after dark, and rain falls on around 61 of the 90 days.
June through August
June through August sits firmly in the heat here - highs near 84°F (29°C), nights near 74°F (24°C), and rain falls on around 30 of the 90 days. Daylight is generous - around 10.2 hours of sun a day.
Average temperatures in Port Moresby by month
| 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% |