Climate averages 1991–2020

Jayapura weather
in September.

A hot, very wet month: the joint 5th warmest and the 2nd driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 29.5°C Daytime mean, September

Average low 24.2°C Night-time mean, September

Rainfall 191 mm 24 days with ≥1 mm

Daylight 12 h Sunrise to sunset, per day

September is a hot month in Jayapura: daytime highs average 29.5°C and nights cool to about 24.2°C. By daytime temperature it is the joint 5th warmest of the 12 months.

Expect about 191 mm of rain on roughly 24 days, which makes September a very wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 06 min on an average September day.

The nearest other city in this atlas is Nabire (587 km away). In September its highs average 28.2°C, 1.3°C cooler than Jayapura, with 255 mm of rain.

Among the 200 cities listed in Indonesia, Jayapura ranks joint 125th of 200 for the warmest September highs and joint 168th of 200 for the driest September (rainfall, lowest first). The mean September high of those 200 cities is 30.1°C; Jayapura is 0.6°C cooler than that mean.

From September to October, average highs rise by 0.4°C to 29.9°C, and monthly rainfall falls from 191 mm to 186 mm.

The annual picture

September in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Jayapura climate table

1991–2020

Monthly climate averages for Jayapura, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	29.4°C24.7°C	24.7°C	244	27.2	12.212 h
February	29.3°C24.6°C	24.6°C	240	24.2	12.212 h
March	29.4°C24.6°C	24.6°C	267	27.3	12.112 h
April	29.5°C24.6°C	24.6°C	250	27.2	12.112 h
May	29.6°C24.6°C	24.6°C	215	27.2	12.012 h
June	29.2°C24.3°C	24.3°C	221	27.0	12.012 h
July	28.9°C24.1°C	24.1°C	236	26.0	12.012 h
August	29.2°C24.0°C	24.0°C	210	25.3	12.012 h
September, selected	29.5°C24.2°C	24.2°C	191	24.1	12.112 h
October	29.9°C24.4°C	24.4°C	186	25.7	12.212 h
November	29.8°C24.6°C	24.6°C	233	26.9	12.212 h
December	29.6°C24.7°C	24.7°C	265	28.1	12.312 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

September in nearby cities

Distance from Jayapura

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Jayapura) is explained once on the Jayapura year overview and on the Sources, method and limits page.