Sideia Weather in September
With daytime temperatures of 27°C (81°F) and nighttime lows of 24°C (75°F), September in Sideia brings high temperatures during the day. Do keep in mind that September is part of the rainy season, with frequent and often heavy rainfall.
Rainfall in Sideia in September
As part of the rainy season, Sideia sees around 13 days of rain in September, with an average of 194 mm (7.6 in). Rain during the rainy season is significant rather than just light drizzle. Expect proper showers on most rainy days.
Temperature in Sideia in September
Daytime highs in Sideia in September reach 27°C (81°F), with nights around 24°C (75°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. With overnight lows of 24°C (75°F), evenings and nights remain warm. Light clothing and an open window or fan can help you sleep comfortably.
Average water temperature in September
With water at 26°C (79°F), you can expect warm, pleasant conditions for any water activity. There's no adjustment period — it feels comfortable straight away.If you prefer enjoying temperate temperatures and rain-free days, November and December typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Papua New Guinea, check out our Sideia's climate page.
Sideia Temperature in September
Min Temperature
24°C (75°F)
Max Temperature
27°C (81°F)
Water Temperature
26°C (79°F)
Chance of Rain
43%
Precipitation
194 mm (7.6 in)
Rainy days
13 days
Humidity
82%
Historical weather for Sideia in September
Browse day-by-day weather records for Sideia spanning 26 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Sideia historical weather extremes in September
Based on weather observations in Sideia between 2004 and 2025, these are the recorded extremes during September.
- The warmest day in September was on September 5, 2022, with a maximum of 32°C (90°F).
- On September 29, 2004, Sideia saw its coldest September day with temperatures maxing out at 21°C (70°F).
- Nighttime temperatures dropped to 19°C (66°F) on September 5, 2019, marking the coldest September night on record.
Best Places in Papua New Guinea in September
Find out more about the weather in Papua New Guinea and which places have the best travel conditions in this month. See all of Papua New Guinea in September →
perfect weather
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What to Wear in Sideia in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. With water temperatures around 26°C (79°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes.What To Do in Sideia in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Papua New Guinea, check out our Sideia's climate page.
Temperature Rainfall Humidity Water Temp
See the full Sideia climate overview or explore weather in Papua New Guinea.
