Climate averages 1991–2020

Wollongong weather
in January.

A warm, moderately wet month: the warmest and the 6th driest of the year.

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

Average high 24.8°C Daytime mean, January

Average low 19.2°C Night-time mean, January

Rainfall 84 mm 11 days with ≥1 mm

Daylight 14 h Sunrise to sunset, per day

January is a warm month in Wollongong: daytime highs average 24.8°C and nights cool to about 19.2°C. By daytime temperature it is the warmest month of the year.

Expect about 84 mm of rain on roughly 11 days, which makes January a moderately wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 10 min on an average January day.

The nearest other city in this atlas is Sydney (68 km away). In January its highs average 25.6°C, 0.8°C warmer than Wollongong, with 73 mm of rain.

Among the 32 cities listed in Australia, Wollongong ranks 27th of 32 for the warmest January highs and 18th of 32 for the driest January (rainfall, lowest first). The mean January high of those 32 cities is 27.2°C; Wollongong is 2.4°C cooler than that mean.

From January to February, average highs fall by 0.5°C to 24.3°C, and monthly rainfall rises from 84 mm to 118 mm.

The annual picture

January 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

Wollongong climate table

1991–2020

Monthly climate averages for Wollongong, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January, selected	24.8°C19.2°C	19.2°C	84	10.8	14.214 h
February	24.3°C19.4°C	19.4°C	118	12.3	13.413 h
March	23.0°C18.3°C	18.3°C	109	13.9	12.312 h
April	20.9°C16.0°C	16.0°C	95	11.8	11.311 h
May	18.3°C13.5°C	13.5°C	97	10.0	10.410 h
June	16.0°C11.7°C	11.7°C	123	10.3	9.910 h
July	15.5°C10.5°C	10.5°C	66	7.9	10.110 h
August	16.6°C10.7°C	10.7°C	63	6.8	10.811 h
September	18.8°C12.3°C	12.3°C	59	7.5	11.812 h
October	20.6°C14.1°C	14.1°C	73	9.7	12.913 h
November	21.9°C15.7°C	15.7°C	85	10.8	13.914 h
December	23.5°C17.5°C	17.5°C	72	11.4	14.414 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

January in nearby cities

Distance from Wollongong

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 Wollongong) is explained once on the Wollongong year overview and on the Sources, method and limits page.