Climate averages 1991–2020
Port Moresby weather
in July.
A hot, fairly dry month: the coolest and the driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Port Moresby: daytime highs average 28.6°C and nights cool to about 22.6°C. By daytime temperature it is the coolest month of the year.
Expect about 29 mm of rain on roughly 5 days, which makes July a fairly dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 11 h 37 min on an average July day.
The nearest other city in this atlas is Merauke (749 km away). In July its highs average 27.7°C, 0.9°C cooler than Port Moresby, with 27 mm of rain.
From July to August, average highs rise by 0.6°C to 29.2°C, and monthly rainfall rises from 29 mm to 34 mm.
The annual picture
July 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 | 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, selected | 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
July 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.