Port Moresby climate — normals and trends
Port Moresby (Papua New Guinea) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 25.6 °C and it receives 1,557 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is December (26.3 °C on average) and the coldest is July (24.5 °C). Rainfall peaks in March.
Port Moresby averages 0 frost days, 42 hot days (≥ 30 °C) and 190 rainy days per year.
Port Moresby has warmed by +1.6 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The hottest day of the period reached 33.5 °C (on 13 December 2018) and the coldest 17.6 °C (on 11 September 1961).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
Port MoresbyNational Capital
- coords
- -9.48°, 147.15°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.6°C
Average daily high
28.4°C
Average daily low
23.3°C
Annual rainfall
1,557mm
Sunshine / day
10.1h
Mean relative humidity
83%
Average peak wind
16.4km/h
Seasonal range
1.8°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
42 d/yr
Rainy days (≥ 1 mm)
190 d/yr
Annual snowfall
0.0 cm
Average feels-like high
32.8 °C
Average feels-like low
26.5 °C
Average peak gust
33.2 km/h
Tropical nights (≥ 20 °C)
361 d/yr
Solar radiation
18.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.70 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
33.5 °C
13 December 2018
Coldest day
17.6 °C
11 September 1961
Wettest day
151 mm
15 February 2006
Windiest day
43.3 km/h
8 March 1977
Strongest gust
98.3 km/h
2 January 2019
Hottest feels-like
40.1 °C
1 March 1994
Coldest feels-like
17.2 °C
16 August 1976
Sunniest day
12.5 h
21 January 1947
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 30.4 °C | +1.4 °C | 179 mm | -47 mm |
| Feb | 30.1 °C | +1.3 °C | 207 mm | -28 mm |
| Mar | 29.9 °C | +1.4 °C | 299 mm | +14 mm |
| Apr | 29.5 °C | +1.2 °C | 216 mm | +22 mm |
| May | 29.4 °C | +1.2 °C | 102 mm | +14 mm |
| Jun | 28.9 °C | +1.3 °C | 73 mm | +18 mm |
| Jul | 28.7 °C | +1.5 °C | 59 mm | +19 mm |
| Aug | 28.3 °C | +0.7 °C | 25 mm | -12 mm |
| Sep | 28.9 °C | +0.8 °C | 107 mm | +61 mm |
| Oct | 29.8 °C | +1.0 °C | 88 mm | +18 mm |
| Nov | 29.8 °C | +0.6 °C | 195 mm | +91 mm |
| Dec | 30.0 °C | +0.8 °C | 157 mm | -22 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Port Moresby?
Port Moresby has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 25.6 °C and it receives 1,557 mm of precipitation per year.
What is the hottest day ever recorded in Port Moresby?
The hottest day measured in Port Moresby between 1940 and 2025 was 13 December 2018, reaching 33.5 °C.
What is the coldest day in Port Moresby?
The coldest day measured in Port Moresby between 1940 and 2025 was 11 September 1961, at 17.6 °C.
Does it snow in Port Moresby?
Almost never: Port Moresby sees virtually no snow, with about 0 frost days per year.
Has the climate of Port Moresby warmed?
Yes: Port Moresby warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Port Moresby?
The wettest day measured in Port Moresby between 1940 and 2025 was 15 February 2006, with 151 mm of rain in 24 hours.
What was the windiest day in Port Moresby?
The windiest day measured in Port Moresby between 1940 and 2025 was 8 March 1977, with winds reaching 43.3 km/h.
What is the warmest month in Port Moresby?
The warmest month in Port Moresby is December (26.3 °C on average); the coldest is July (24.5 °C).
How much does it rain in Port Moresby?
Port Moresby receives on average 1,557 mm of precipitation per year, spread over about 190 rainy days.
Is it sunny in Port Moresby?
Port Moresby gets on average 10.1 hours of sunshine per day, roughly 3,687 hours per year over 1940-2025.
Are there tropical nights in Port Moresby?
Yes: Port Moresby has on average 361 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Port Moresby?
In Port Moresby, between 1940 and 2025, the highest apparent temperature reached 40.1 °C on 1 March 1994, and the lowest was 17.2 °C on 16 August 1976.
Compare Port Moresby with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Port Moresby