🇵🇬Papua New Guinea

Papua New Guinea occupies the eastern half of New Guinea island plus the Bismarck Archipelago, Bougainville, and hundreds of smaller islands spanning roughly 462,840 km² between 0°–12°S and 141°–156°E. Dominated by the Owen Stanley Range and central Highlands rising to Mount Wilhelm (4,509 m, the highest peak), the terrain is extremely rugged with tropical rainforests covering 70% of the land, active volcanoes, and narrow coastal plains.

This topography generates a dramatic climate spectrum — equatorial tropical (Af) in the lowlands and coasts with year-round heat (26–32°C) and heavy rainfall (2,500–8,000 mm annually), subtropical highland (Cfb) in the interior mountains with temperate conditions (10–20°C in Mount Hagen and Goroka), and montane/alpine above 3,500 m on Mount Wilhelm with freezing nights. Papua New Guinea sits in the Western Pacific Warm Pool, the warmest ocean region on Earth, driving intense convection and making it one of the wettest countries globally.

Port Moresby (capital, rain-shadowed by mountains) averages 26°C year-round with only 1,000 mm rainfall (dry June–November, wet December–May). Lae averages 27°C with 4,600 mm distributed throughout the year. Mount Hagen (highland center, 1,677 m elevation) averages 18°C with 2,700 mm and daily fog. Goroka (1,600 m) registers 18°C with 2,100 mm. Rabaul (volcanic Bismarck Sea coast) averages 27°C with 2,900 mm plus recurrent cyclone impacts.

Wewak averages 27°C with 3,200 mm. Papua New Guinea experiences severe climate extremes amplified by ENSO and the Western Pacific monsoon — the severe 1997–98 El Niño drought-and-frost event killed crops across the Highlands, causing famine and hundreds of deaths; the 2015–16 El Niño triggered a national drought emergency affecting 2.4 million people with crop failures and water shortages; the May 2024 Enga Province landslide buried over 2,000 people (rainfall amplified by climate change saturated unstable slopes); recurrent Bismarck Sea cyclones including Cyclone Guba (2007, 149 deaths, severe Oro Province flooding); accelerating sea-level rise is displacing Carteret Islanders (first climate refugees relocating since 2009) and threatening dozens of low-lying atolls; and the February 2018 Highlands earthquake (M7.5) combined with heavy rainfall caused 160 deaths and massive landslides.

Our archive covers 0 Papua New Guinean cities with daily ERA5 reanalysis data going back to 1940.