Port Moresby climate: monthly averages: annual mean temperature 27.2 C; warmest month Dec (28.4 C); coldest month Aug (25.7 C).
Annual mean temperature: 27.2 C
Warmest month: Dec (28.4 C)
Coldest month: Aug (25.7 C)
Wettest month: Mar (9.47 mm/day)
All-time record high: 33.0 C
All-time record low: 21.7 C
This page is a single place to check Port Moresby climate: monthly averages. Port runs from 25.7 C in Aug to 28.4 C in Dec, a swing of 2.7 C. Rain is strongly seasonal: Mar is the wettest month at 9.47 mm/day, while Jul runs at 0.81 mm/day, about 11.7x drier. Taken together that is roughly 1,339 mm of rain a year for the grid cell. Values come from a public open API; a successful result is cached so a later outage never blanks the page. Scroll for the month-by-month figures, or jump to a neighbouring location from the links below.
Annual mean temperature 27.2 C
Warmest month Dec (28.4 C)
Coldest month Aug (25.7 C)
Wettest month Mar (9.47 mm/day)
All-time record high 33.0 C
All-time record low 21.7 C
Annual precipitation 1,336 mm / year
Coordinates -9.47723, 147.15089
Population 283,733
Average monthly temperature and rainfall in Port Moresby
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
28.1
7.45
32.4
25.4
Feb
27.9
6.58
32.0
25.2
Mar
27.8
9.47
32.5
25.2
Apr
27.8
4.91
32.1
25.1
May
27.4
2.90
31.4
24.1
Jun
26.6
2.29
31.8
23.0
Jul
25.9
0.81
31.8
22.3
Aug
25.7
1.13
31.8
21.7
Sep
26.2
1.16
33.0
22.2
Oct
26.9
1.43
31.9
23.1
Nov
27.7
2.31
32.5
24.7
Dec
28.4
3.62
32.6
24.7
What the Port Moresby climate table shows
Values are multi-decadal climatological averages for the -9.47723, 147.15089 grid cell, not a single year. Rain is the daily mean, so a value of 2.00 mm/day is about 60 mm across a 30-day month. Averages smooth over extremes, so use them for planning rather than for what to pack for next Tuesday.
Frequently asked questions
How much rain is 9.47 mm/day in a month?
Rain is recorded as a daily mean, so 9.47 mm/day is roughly 288 mm across a 30-day month.
Does Port get the same every year?
Close to it. Averaging decades smooths variation, so treat these as typical rather than guaranteed.