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Adelaide Hills, South Australia climate

Csb Warm-summer Mediterranean

Adelaide Hills has a mildly seasonal mild-temperate climate (Warm-summer Mediterranean, Köppen Csb). The hottest month is January with an average daily high near 28°C, while the coldest is July averaging around 5°C at night. Precipitation totals about 734 mm a year and is strongly seasonal — July alone averages 114 mm while January barely receives 23 mm.

☀️ Summers

Warm

Highs near 28°C in January.

About 30 days a year above 32 °C

❄️ Winters

Cool

Lows near 5°C in July.

About 5 freezing nights a year

🌧️ Rain

Moderate rainfall

About 734 mm of rain a year.

Wettest in July

⛅ 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

Adelaide Hills climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	28	28	25	21	17	14	14	15	17	21	24	26
Avg temp (°C)	20	20	18	15	12	10	10	10	12	14	17	19
Avg low (°C)	13	13	11	9	8	6	5	5	7	8	10	11
Precipitation (mm)	23	26	27	48	75	100	114	103	86	52	39	40

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	28	28	25	21	17	14
Avg temp (°C)	20	20	18	15	12	10
Avg low (°C)	13	13	11	9	8	6
Precipitation (mm)	23	26	27	48	75	100

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	14	15	17	21	24	26
Avg temp (°C)	10	10	12	14	17	19
Avg low (°C)	5	5	7	8	10	11
Precipitation (mm)	114	103	86	52	39	40

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	6	6	8	11	16	17	18	18	15	12	10	9
Days with high ≥ 32°C (days)	8	8	4	0.4	—	—	—	—	—	0.5	3	5
Days with low ≤ 0°C (days)	—	—	—	—	0.4	1	1	2	0.4	—	—	—

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	6	6	8	11	16	17
Days with high ≥ 32°C (days)	8	8	4	0.4	—	—
Days with low ≤ 0°C (days)	—	—	—	—	0.4	1

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	18	18	15	12	10	9
Days with high ≥ 32°C (days)	—	—	—	0.5	3	5
Days with low ≤ 0°C (days)	1	2	0.4	—	—	—

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	58	57	57	59	62	60	58	56	58	61	63	61
Clear days (≤ 30% cloud)	6	6	7	6	4	4	4	5	5	6	4	6
Partly cloudy days (30–70%)	13	11	13	12	14	16	17	16	14	12	12	11
Cloudy days (≥ 70%)	12	11	12	12	13	11	10	10	11	14	14	14
Relative humidity (%)	52	53	58	63	73	79	80	76	72	64	59	54
Wind speed (mph)	7.4	7.2	6.4	5.5	5.3	5.4	5.5	5.7	5.8	6.0	6.4	7.0

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	58	57	57	59	62	60
Clear days (≤ 30% cloud)	6	6	7	6	4	4
Partly cloudy days (30–70%)	13	11	13	12	14	16
Cloudy days (≥ 70%)	12	11	12	12	13	11
Relative humidity (%)	52	53	58	63	73	79
Wind speed (mph)	7.4	7.2	6.4	5.5	5.3	5.4

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	58	56	58	61	63	61
Clear days (≤ 30% cloud)	4	5	5	6	4	6
Partly cloudy days (30–70%)	17	16	14	12	12	11
Cloudy days (≥ 70%)	10	10	11	14	14	14
Relative humidity (%)	80	76	72	64	59	54
Wind speed (mph)	5.5	5.7	5.8	6.0	6.4	7.0

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Mount Barker, a weather station, about 21 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 →