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Newcastle, New South Wales climate

Cfa Humid subtropical

Newcastle has a mildly seasonal warm-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is January with an average daily high near 26°C, while the coldest is July averaging around 9°C at night. Around 1037 mm of precipitation falls each year, peaking in June (131 mm) and easing off in August (50 mm).

☀️ Summers

Warm

Highs near 26°C in January.

About 10 days a year above 32 °C

❄️ Winters

Cool

Lows near 9°C in July.

🌧️ Rain

Wet

About 1037 mm of rain a year.

Wettest in June

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

+0.6 °C vs 50 years ago

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Clear vs cloudy days

Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day counts

Newcastle climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	26	26	25	23	21	18	18	19	21	22	23	25
Avg temp (°C)	23	23	22	20	17	14	14	15	17	19	20	22
Avg low (°C)	20	20	19	16	13	11	9	10	13	15	17	19
Precipitation (mm)	71	110	114	109	117	131	69	50	58	64	78	66

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	26	26	25	23	21	18
Avg temp (°C)	23	23	22	20	17	14
Avg low (°C)	20	20	19	16	13	11
Precipitation (mm)	71	110	114	109	117	131

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	18	19	21	22	23	25
Avg temp (°C)	14	15	17	19	20	22
Avg low (°C)	9	10	13	15	17	19
Precipitation (mm)	69	50	58	64	78	66

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	10	11	12	11	12	13	10	8	9	10	11	11
Days with high ≥ 32°C (days)	2	1	0.8	0.2	—	—	—	—	0.3	1	2	2

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	10	11	12	11	12	13
Days with high ≥ 32°C (days)	2	1	0.8	0.2	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	10	8	9	10	11	11
Days with high ≥ 32°C (days)	—	—	0.3	1	2	2

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	60	61	57	52	49	52	46	41	44	55	62	61
Clear days (≤ 30% cloud)	6	5	7	8	10	9	11	13	12	8	5	6
Partly cloudy days (30–70%)	10	10	12	13	10	11	11	11	11	12	11	11
Cloudy days (≥ 70%)	14	13	12	9	10	10	8	7	7	12	13	15
Relative humidity (%)	73	75	75	73	73	76	73	69	69	69	72	72
Wind speed (m/s)	2.9	3.0	2.9	2.8	2.9	3.2	3.2	3.1	3.0	2.9	2.9	2.9

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	60	61	57	52	49	52
Clear days (≤ 30% cloud)	6	5	7	8	10	9
Partly cloudy days (30–70%)	10	10	12	13	10	11
Cloudy days (≥ 70%)	14	13	12	9	10	10
Relative humidity (%)	73	75	75	73	73	76
Wind speed (m/s)	2.9	3.0	2.9	2.8	2.9	3.2

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	46	41	44	55	62	61
Clear days (≤ 30% cloud)	11	13	12	8	5	6
Partly cloudy days (30–70%)	11	11	11	12	11	11
Cloudy days (≥ 70%)	8	7	7	12	13	15
Relative humidity (%)	73	69	69	69	72	72
Wind speed (m/s)	3.2	3.1	3.0	2.9	2.9	2.9

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Newcastle Nobbys Signal Statio, a weather station, about 2 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →