Climate averages 1991–2020
Port Moresby weather
in April.
A hot, wet month: the joint 7th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a hot month in Port Moresby: daytime highs average 29.3°C and nights cool to about 23.3°C. By daytime temperature it is the joint 7th warmest of the 12 months.
Expect about 177 mm of rain on roughly 20 days, which makes April a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 54 min on an average April day.
The nearest other city in this atlas is Merauke (749 km away). In April its highs average 29.2°C, about as warm as Port Moresby, with 206 mm of rain.
From April to May, average highs fall by 0.1°C to 29.2°C, and monthly rainfall falls from 177 mm to 81 mm.
The annual picture
April in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Port Moresby climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.1°C23.6°C | 23.6°C | 230 | 22.9 | 12.613 h |
| February | 29.9°C23.6°C | 23.6°C | 197 | 21.1 | 12.412 h |
| March | 29.3°C23.2°C | 23.2°C | 276 | 24.9 | 12.212 h |
| April, selected | 29.3°C23.3°C | 23.3°C | 177 | 20.2 | 11.912 h |
| May | 29.2°C23.3°C | 23.3°C | 81 | 12.2 | 11.712 h |
| June | 28.9°C23.1°C | 23.1°C | 51 | 8.6 | 11.612 h |
| July | 28.6°C22.6°C | 22.6°C | 29 | 5.2 | 11.612 h |
| August | 29.2°C22.4°C | 22.4°C | 34 | 6.4 | 11.812 h |
| September | 30.1°C22.8°C | 22.8°C | 45 | 7.8 | 12.012 h |
| October | 30.8°C23.2°C | 23.2°C | 62 | 11.0 | 12.312 h |
| November | 31.0°C23.5°C | 23.5°C | 110 | 15.5 | 12.513 h |
| December | 30.6°C23.7°C | 23.7°C | 170 | 21.2 | 12.713 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
April in nearby cities
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Port Moresby) is explained once on the Port Moresby year overview and on the Sources, method and limits page.