Climate Insights for Sissano

, West Sepik Province, Papua New Guinea

Hottest
December
29°C peak
Coldest
July
24°C low
Wettest
March
353mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Sissano is hot. The average annual temperature is 26°C and approximately 3110mm of precipitation falls per year. Sissano receives a notable amount of rainfall throughout the year, including during its driest month. Sissano 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: 29° Average: 26° Min: 24° Feb Max: 29° Average: 26° Min: 24° Mar Max: 29° Average: 26° Min: 24° Apr Max: 29° Average: 26° Min: 24° May Max: 29° Average: 26° Min: 24° Jun Max: 28° Average: 26° Min: 24° Jul Max: 28° Average: 26° Min: 24° Aug Max: 29° Average: 26° Min: 24° Sep Max: 29° Average: 26° Min: 24° Oct Max: 29° Average: 26° Min: 24° Nov Max: 29° Average: 26° Min: 24° Dec Max: 29° Average: 26° Min: 24°
Max
Average
Min

Sissano has relatively stable temperatures year-round, staying within a 5°C range. The warmest month is December, when average highs reach 29°C and the mean temperature sits around 26°C. July is the coolest month, with minimum temperatures around 24°C and an average of 26°C. Daily temperature variation is modest, with an average difference of 5°C between highs and lows.

Precipitation

0mm 50mm 100mm 150mm 200mm 250mm 300mm 350mm 400mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 254mm Feb Precipitation: 237mm Mar Precipitation: 353mm Apr Precipitation: 298mm May Precipitation: 208mm Jun Precipitation: 217mm Jul Precipitation: 253mm Aug Precipitation: 229mm Sep Precipitation: 220mm Oct Precipitation: 257mm Nov Precipitation: 302mm Dec Precipitation: 281mm
Precipitation

Sissano is a very wet location, receiving approximately 3110mm of precipitation annually, which averages out to around 259mm per month. The wettest month is March, averaging 353mm of rainfall. November and April also tend to see above-average precipitation. The driest month is May, with just 208mm. That's 145mm less than March, 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 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 2km/h Feb Wind Speed: 3km/h Mar Wind Speed: 2km/h Apr Wind Speed: 2km/h May Wind Speed: 2km/h Jun Wind Speed: 2km/h Jul Wind Speed: 2km/h Aug Wind Speed: 2km/h Sep Wind Speed: 2km/h Oct Wind Speed: 2km/h Nov Wind Speed: 2km/h Dec Wind Speed: 2km/h
Wind Speed

Sissano is relatively calm, with an average annual wind speed of 2km/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 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

Seasons

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

92 days until Spring

It is currently winter in Sissano, which began on June 21, 2026. Sissano sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in December at around 29°C, while the coldest stretch bottoms out in July near 24°C. Spring is next, beginning on September 23, 2026 — 92 days from now.

Spring

Temperatures range from 24 to 29°C. Rainfall is heavy, totalling around 780mm across the season with a monthly average of 260mm. Winds are generally light, averaging 2km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 24 to 29°C. Rainfall is heavy, totalling around 772mm across the season with a monthly average of 257mm. Winds are generally light, averaging 2km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 24 to 29°C. Rainfall is heavy, totalling around 859mm across the season with a monthly average of 286mm. Winds are generally light, averaging 2km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from 24 to 29°C. Rainfall is heavy, totalling around 699mm across the season with a monthly average of 233mm. Winds are generally light, averaging 2km/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 Sissano 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
24 °C
29 °C
2 km/h
254 mm
0 cm
Feb
24 °C
29 °C
3 km/h
237 mm
0 cm
Mar
24 °C
29 °C
2 km/h
353 mm
0 cm
Apr
24 °C
29 °C
2 km/h
298 mm
0 cm
May
24 °C
29 °C
2 km/h
208 mm
0 cm
Jun Current
24 °C
28 °C
2 km/h
217 mm
0 cm
Jul
24 °C
28 °C
2 km/h
253 mm
0 cm
Aug
24 °C
29 °C
2 km/h
229 mm
0 cm
Sep
24 °C
29 °C
2 km/h
220 mm
0 cm
Oct
24 °C
29 °C
2 km/h
257 mm
0 cm
Nov
24 °C
29 °C
2 km/h
302 mm
0 cm
Dec
24 °C
29 °C
2 km/h
281 mm
0 cm
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