Climate Insights for Heiweni

, Morobe Province, Papua New Guinea

Hottest
November
25°C peak
Coldest
July
16°C low
Wettest
April
498mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Heiweni is warm and mild. The average annual temperature is 20°C and approximately 4431mm of precipitation falls per year. Heiweni receives a notable amount of rainfall throughout the year, including during its driest month. Heiweni sits near the equator, so seasonal temperature differences are minimal throughout the year.

Temperature

10° 15° 20° 25° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 25° Average: 20° Min: 17° Feb Max: 24° Average: 20° Min: 17° Mar Max: 25° Average: 20° Min: 17° Apr Max: 24° Average: 20° Min: 17° May Max: 24° Average: 20° Min: 17° Jun Max: 24° Average: 19° Min: 16° Jul Max: 23° Average: 19° Min: 16° Aug Max: 23° Average: 19° Min: 16° Sep Max: 24° Average: 19° Min: 16° Oct Max: 25° Average: 20° Min: 17° Nov Max: 25° Average: 20° Min: 17° Dec Max: 25° Average: 20° Min: 17°
Max
Average
Min

Heiweni has relatively stable temperatures year-round, staying within a 9°C range. November is the warmest month, though highs remain moderate at 25°C with a mean of 20°C. July is the coolest month, with minimum temperatures around 16°C and an average of 19°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows.

Precipitation

0mm 50mm 100mm 150mm 200mm 250mm 300mm 350mm 400mm 450mm 500mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 383mm Feb Precipitation: 303mm Mar Precipitation: 445mm Apr Precipitation: 498mm May Precipitation: 388mm Jun Precipitation: 288mm Jul Precipitation: 259mm Aug Precipitation: 327mm Sep Precipitation: 409mm Oct Precipitation: 422mm Nov Precipitation: 349mm Dec Precipitation: 360mm
Precipitation

Heiweni is a very wet location, receiving approximately 4431mm of precipitation annually, which averages out to around 369mm per month. The wettest month is April, averaging 498mm of rainfall. March and October also tend to see above-average precipitation. The driest month is July, with just 259mm. That's 240mm less than April, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.

Wind

0km/h 5km/h 10km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 7km/h Feb Wind Speed: 8km/h Mar Wind Speed: 7km/h Apr Wind Speed: 6km/h May Wind Speed: 6km/h Jun Wind Speed: 6km/h Jul Wind Speed: 6km/h Aug Wind Speed: 6km/h Sep Wind Speed: 7km/h Oct Wind Speed: 6km/h Nov Wind Speed: 7km/h Dec Wind Speed: 7km/h
Wind Speed

Heiweni is relatively calm, with an average annual wind speed of 7km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 8km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 6km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.

Seasons

Winter
Dec 21
Spring
Sep 23
Summer
Dec 21
Autumn
Mar 20

89 days until Winter

It is currently autumn in Heiweni, which began on March 20, 2026. Heiweni sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in November at around 25°C, while the coldest stretch bottoms out in July near 16°C. Winter is next, beginning on June 21, 2026 — 89 days from now.

Spring

Temperatures range from 16 to 25°C. Rainfall is heavy, totalling around 1180mm across the season with a monthly average of 393mm. Winds are generally light, averaging 7km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 17 to 25°C. Rainfall is heavy, totalling around 1047mm across the season with a monthly average of 349mm. Winds are generally light, averaging 7km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 17 to 25°C. Rainfall is heavy, totalling around 1331mm across the season with a monthly average of 444mm. Winds are generally light, averaging 6km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from 16 to 24°C. Rainfall is heavy, totalling around 873mm across the season with a monthly average of 291mm. Winds are generally light, averaging 6km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.

Monthly Climate Data

The table below shows monthly climate averages for Heiweni based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.

Month
Min Temperature
Max Temperature
Wind Speed
Precipitation
Snow
Jan
17 °C
25 °C
7 km/h
383 mm
0 cm
Feb
17 °C
24 °C
8 km/h
303 mm
0 cm
Mar Current
17 °C
25 °C
7 km/h
445 mm
0 cm
Apr
17 °C
24 °C
6 km/h
498 mm
0 cm
May
17 °C
24 °C
6 km/h
388 mm
0 cm
Jun
16 °C
24 °C
6 km/h
288 mm
0 cm
Jul
16 °C
23 °C
6 km/h
259 mm
0 cm
Aug
16 °C
23 °C
6 km/h
327 mm
0 cm
Sep
16 °C
24 °C
7 km/h
409 mm
0 cm
Oct
17 °C
25 °C
6 km/h
422 mm
0 cm
Nov
17 °C
25 °C
7 km/h
349 mm
0 cm
Dec
17 °C
25 °C
7 km/h
360 mm
0 cm
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Metric (°C, km/h)