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Mount Hagen, Papua New Guinea climate

Af Tropical rainforest

Mount Hagen has a remarkably steady tropical climate (Tropical rainforest, Köppen Af). The hottest month is December with an average daily high near 31°C, while the coldest is July averaging around 24°C at night. Precipitation totals about 3122 mm a year and is strongly seasonal — April alone averages 401 mm while August barely receives 100 mm.

☀️ All year

Hot

Daytime highs near 31°C most of the year.

About 27 days a year above 32 °C

🌙 Nights

Stays warm

Even the coolest nights stay near 24°C.

🌧️ Rain

Very wet

About 3122 mm of rain a year.

Wettest in April

⛅ Sky & trend

Often grey

Overcast skies dominate much of the year.

+0.2 °C vs 50 years ago

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Mount Hagen climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	31	31	31	31	31	31	30	30	31	31	31	31
Avg temp (°C)	27	27	27	27	27	27	27	27	27	27	28	28
Avg low (°C)	24	24	24	24	24	24	24	24	24	24	24	24
Precipitation (mm)	302	301	314	401	363	184	128	100	103	244	297	385

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	31	31	31	31	31	31
Avg temp (°C)	27	27	27	27	27	27
Avg low (°C)	24	24	24	24	24	24
Precipitation (mm)	302	301	314	401	363	184

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	30	30	31	31	31	31
Avg temp (°C)	27	27	27	27	28	28
Avg low (°C)	24	24	24	24	24	24
Precipitation (mm)	128	100	103	244	297	385

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	12	12	13	14	11	8	7	5	4	9	10	12
Days with high ≥ 32°C (days)	4	3	3	2	2	0.8	0.3	0.3	2	2	4	4

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	12	12	13	14	11	8
Days with high ≥ 32°C (days)	4	3	3	2	2	0.8

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	7	5	4	9	10	12
Days with high ≥ 32°C (days)	0.3	0.3	2	2	4	4

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	87	88	88	82	74	69	69	67	69	74	81	84
Relative humidity (%)	89	90	90	90	90	89	88	86	84	84	86	88
Wind speed (m/s)	0.9	0.9	0.9	0.7	0.7	0.8	0.8	0.8	0.8	0.8	0.7	0.8

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	87	88	88	82	74	69
Relative humidity (%)	89	90	90	90	90	89
Wind speed (m/s)	0.9	0.9	0.9	0.7	0.7	0.8

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	69	67	69	74	81	84
Relative humidity (%)	88	86	84	84	86	88
Wind speed (m/s)	0.8	0.8	0.8	0.8	0.7	0.8

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 13 years of daily observations at Madang W.o., a weather station, about 188 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →