Climate and average weather in Mount Hagen

In Mount Hagen, the weather is warm, wet, and mostly cloudy and remarkably steady, with daytime highs holding near warm levels all year. The wettest stretch peaks around January.

Best: early April to late December

Over the course of the year, the temperature in Mount Hagen typically varies from 13°C to 22°C, and is rarely below 11°C or above 25°C. December is the hottest month of the year, while July is the coldest.

Based on the travel score, the best times of year to visit Mount Hagen for warm-weather activities are from early January to late January and early April to late December.

Hottest
Dec
22°
Coldest
Jul
13°
Wettest
Jan
520 mm
Driest
Jun
173 mm
Rain / yr
3948 mm
302 wet days
Daylight
11.7–12.3 h
shortest–longest
Elevation
1,728 m
5.9°S
Clearest
Aug
78% cloud

Mount Hagen is capital town of Western Highlands, Papua New Guinea.

Founded
1934

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Mount Hagen weather by month, at a glance

The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.

Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around early April to late December.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

Daily average highs and lows in Mount Hagen, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.

Temperatures in Mount Hagen stay fairly even through the year, without a distinct hot or cool season. The warmest month is December, with an average high of 22°C and low of 14°C; the coolest is July, with an average low of 13°C and high of 22°C.

Days typically run about 8°C warmer than nights year-round.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2214
Feb2214
Mar2214
Apr2214
May2214
Jun2213
Jul2213
Aug2213
Sep2213
Oct2213
Nov2214
Dec2214

Average hourly temperature in Mount Hagen

A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on December afternoons, near 22°C, and coldest before dawn in July, near 13°C.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM

Mount Hagen weather by month

Every month at a glance. Click a month for its detailed page.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 14°52027.712.33.7
Feb22° / 14°49125.712.23.6
Mar22° / 14°49128.3123.6
Apr22° / 14°37626.311.93.8
May22° / 14°23023.411.74.4
Jun22° / 13°17321.611.74.6
Jul22° / 13°19923.411.74.4
Aug22° / 13°21123.811.84.4
Sep22° / 13°23123.8124.2
Oct22° / 13°28724.812.14.2
Nov22° / 14°31625.312.34.0
Dec22° / 14°42327.712.33.7

Chance of rain

How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.

Mount Hagen gets about 3948 mm of precipitation a year. On a typical day the chance of rain is very wet, but that rises and falls sharply with the seasons.

The wetter season lasts 6.0 months, from around Oct 28 to Apr 28, peaking in February at about 93% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jun 12.

January is the wettest month by volume, with 520 mm over about 28 wet days; June is the driest, with 173 mm.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetvery wetFeb 3 · 93%Jun 12 · 70%
Rain on a day (%)Rain days
Jan9028
Feb9226
Mar9128
Apr8826
May7623
Jun7222
Jul7623
Aug7724
Sep7924
Oct8025
Nov8425
Dec8928

Monthly rainfall

Over a full year, Mount Hagen collects about 3948 mm of rain across 302 wet days — roughly 329 mm in an average month.

It doesn’t fall evenly. January is the wettest month with 520 mm, while June is the driest at just 173 mm. The three wettest months alone bring about 38% of the year’s total.

050100150200250300350400450500550600JanFebMarAprMayJunJulAugSepOctNovDec520491491376230173199211231287316423
Rainfall (mm)Rain days
Jan52028
Feb49126
Mar49128
Apr37626
May23023
Jun17322
Jul19923
Aug21124
Sep23124
Oct28725
Nov31625
Dec42328

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

How often the daytime sky is clear, partly cloudy or overcast.

In Mount Hagen, the average share of the sky covered by clouds shows moderate seasonal variation over the course of the year.

The clearer part of the year begins around May 7 and lasts for 5.4 months, ending around October 18. The clearest month is August, when the sky is clear, mostly clear, or partly cloudy 19% of the time on average.

The cloudier part of the year begins around October 19 and lasts for 6.6 months, ending around May 6. The cloudiest month is February, when it is overcast or mostly cloudy 99% of the time.

0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JanFebMarAprMayJunJulAugSepOctNovDecAug 15 · 20%Feb 6 · 0%partly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan298
Feb199
Mar199
Apr298
May1189
Jun1684
Jul1783
Aug1981
Sep1387
Oct793
Nov496
Dec298

Daylight, sunrise and sunset

DaylightNight

Hours of daylight through the year, with sunrise and sunset times.

The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. Close to the equator, Mount Hagen barely changes through the year: days stay near 12 h 18 min of light in every season.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan12.36:236:42
Feb12.26:326:43
Mar12.06:326:34
Apr11.96:276:19
May11.76:276:11
Jun11.76:336:13
Jul11.76:386:19
Aug11.86:336:21
Sep12.06:186:16
Oct12.16:046:12
Nov12.36:006:16
Dec12.36:096:29

Sunny days

How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.

Mount Hagen gets about 1 sunny days a month gloomy — and it barely shifts through the year, holding between 0 and 2 days every month. Clear skies here are a flat line, not a season.

05JanFebMarAprMayJunJulAugSepOctNovDecgloomyAug 112 daysJan 260 days
Sunny daysSky
Jan0Gloomy
Feb0Gloomy
Mar0Gloomy
Apr0Gloomy
May1Gloomy
Jun1Gloomy
Jul1Gloomy
Aug2Gloomy
Sep1Gloomy
Oct1Gloomy
Nov0Gloomy
Dec0Gloomy

Humidity comfort

DryComfortableHumidMuggyOppressiveMiserable

Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.

Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.

In Mount Hagen, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 5.9 months, from around November 19 to May 18. The muggiest month is December, when the air feels humid, muggy or worse about 49% of the time.

The most comfortable stretch runs from around May 19 to November 18, and August is the most comfortable month — the air is dry or comfortable 90% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecAug 18 · 92%Dec 24 · 44%humidcomfortabledryhumidcomfortablehumid
Dry (%)Comfortable (%)Humid (%)
Jan15049
Feb04852
Mar14752
Apr14653
May26039
Jun57323
Jul68112
Aug78310
Sep78014
Oct67123
Nov36532
Dec24949

Wind

Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.

This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.

Wind in Mount Hagen is steady company: average speeds sit near 4 km/hcalm — in every month of the year, with no meaningful windy or calm season.

0510JanFebMarAprMayJunJulAugSepOctNovDeccalmOct 6 · 4 km/hJan 30 · 4 km/h
Wind speed (km/h)Feels
Jan4calm
Feb4calm
Mar4calm
Apr4calm
May4calm
Jun4calm
Jul4calm
Aug4calm
Sep4calm
Oct4calm
Nov4calm
Dec4calm

Best time to visit Mount Hagen

TravelBeach/poolTemperatureCloudsPrecipitation

To characterize how pleasant the weather is in Mount Hagen throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.

Around late December, Mount Hagen is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.

Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.

The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Mount Hagen for general outdoor tourist activities is from early April to late January, with a peak score in the first week of June.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationJun 7 · 4.6

The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Travel score (0–10)Rating
Jan3.7fair
Feb3.6fair
Mar3.7fair
Apr3.8fair
May4.4fair
Jun4.6fair
Jul4.4fair
Aug4.4fair
Sep4.2fair
Oct4.2fair
Nov4.0fair
Dec3.8fair

The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. In Mount Hagen it holds close to 3.2 all year, so any month is about as good as another for hot-weather activities.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbeach/pool scoretemperaturecloudsprecipitation

The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

What to pack for Mount Hagen, by month

EssentialRecommendedOptional

Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.

Mount Hagen packs about the same all year — highs hold near 22°C. Across the year the things worth having are light clothes and rain gear.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In December, Mount Hagen sees daytime highs around 22°C and nights near 14°C. Pack rain gear. Worth having: light clothes. About 28 days see rain.

UV index (midday) in Mount Hagen by month

LowModerateHighVery highExtreme

Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.

Under clear skies, the midday UV index in Mount Hagen peaks around March 12 at about 17 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 11 (extreme).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 12UV 17Jun 19UV 11
UV index (midday)Level
Jan17Extreme
Feb17Extreme
Mar18Extreme
Apr16Extreme
May13Extreme
Jun11Extreme
Jul12Extreme
Aug13Extreme
Sep15Extreme
Oct15Extreme
Nov15Extreme
Dec14Extreme

Average hourly UV index in Mount Hagen

LowModerateHighVery highExtreme

Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.

The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

UV falls off far faster than brightness as the sun drops, so even in March the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 7 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM
UV ≥ 3 (h/day)UV ≥ 6 (h/day)
Jan8.57
Feb8.57
Mar8.57
Apr86.5
May86
Jun7.55.5
Jul86
Aug86
Sep8.56.5
Oct8.56.5
Nov8.56.5
Dec8.56.5
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Mount Hagen is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDecfrost-free year round
Frost-free chance (%)Frost nights
Jan1000
Feb1000
Mar1000
Apr1000
May1000
Jun1000
Jul1000
Aug1000
Sep1000
Oct1000
Nov1000
Dec1000

Growing degree days

Degree days (base 10°C)Frost-free shaded

Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Mount Hagen banks about 2,870 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around March.

01,0002,0003,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan256
Feb231
Mar256
Apr244
May246
Jun226
Jul228
Aug231
Sep223
Oct237
Nov237
Dec254

Solar energy

Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.

Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.

Mount Hagen receives about 4.4 kWh/m² a day of solar energy — bright — and it stays remarkably steady, holding between 4.1 and 4.9 kWh/m² all year. For solar panels, output here is a flat line, not a seasonal wave.

0123456JanFebMarAprMayJunJulAugSepOctNovDecdimmoderatebrightOct 54.9 kWhJun 284.1 kWh
Solar energy (kWh/m²)Level
Jan4.5Bright
Feb4.2Bright
Mar4.2Bright
Apr4.2Bright
May4.3Bright
Jun4.3Bright
Jul4.2Bright
Aug4.5Bright
Sep4.8Bright
Oct4.8Bright
Nov4.7Bright
Dec4.4Bright

Where is Mount Hagen?

Mount Hagen sits at 5.9°S, 144.2°E, 1,728 m above sea level, in Papua New Guinea. The nearest listed city is Mendi, 71 km away.

GorokaMadangWewakBuloloLaeDaruMerauke

Topography around Mount Hagen

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Mount Hagen.

Within 3 km, the terrain around Mount Hagen has significant variations in elevation — a maximum elevation change of 257 m around an average of 1,727 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,679 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,045 m.

The land around Mount Hagen is covered by trees (57%) and grassland (33%) within 3 km, trees (62%) and grassland (37%) within 16 km, and trees (87%) within 80 km.

3 km
257 m
16 km
1,679 m
80 km
4,045 m
treesgrasslandartificial surfaces
Nearby: Mendi 71 km · Goroka 130 km · Madang 186 km · Wewak 265 km · Bulolo 305 km · Lae 320 km · Daru 375 km · Merauke 514 km

Papua New Guinea travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type I
240 V · 50 Hz
Prices
≈ 58% of US
price level, 2025
GDP per capita
$3,020
2025
Homicide rate
9.3
per 100k, 2010
Road deaths
12.6
per 100k/yr, 2019
Income group
Lower middle
World Bank
Religion
Protestant 64%Roman Catholic 26%other Christian 5%non-Christian 1%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Mount Hagen (-5.8575°, 144.2306°, elevation 1,728 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).