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Bunbury, Western Australia climate

Csa Hot-summer Mediterranean

Bunbury has a mildly seasonal mild-temperate climate (Hot-summer Mediterranean, Köppen Csa). The hottest month is February with an average daily high near 30°C, while the coldest is July averaging around 7°C at night. Precipitation totals about 720 mm a year and is strongly seasonal — July alone averages 140 mm while February barely receives 7 mm.

☀️ Summers

Warm

Highs near 30°C in February.

About 31 days a year above 32 °C

❄️ Winters

Cool

Lows near 7°C in July.

About 2 freezing nights a year

🌧️ Rain

Moderate rainfall

About 720 mm of rain a year.

Wettest in July

⛅ Sky & trend

Often cloudy

Cloudy skies much of the year.

+0.0 °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

Bunbury climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	30	30	28	24	21	19	17	18	19	21	25	27
Avg temp (°C)	23	23	21	18	15	13	12	13	14	15	18	20
Avg low (°C)	15	16	14	12	9	8	7	8	8	10	12	14
Precipitation (mm)	12	7	20	35	97	137	140	118	82	33	22	17

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	30	30	28	24	21	19
Avg temp (°C)	23	23	21	18	15	13
Avg low (°C)	15	16	14	12	9	8
Precipitation (mm)	12	7	20	35	97	137

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	17	18	19	21	25	27
Avg temp (°C)	12	13	14	15	18	20
Avg low (°C)	7	8	8	10	12	14
Precipitation (mm)	140	118	82	33	22	17

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	2	2	4	8	12	16	18	18	16	9	6	4
Days with high ≥ 32°C (days)	9	10	4	0.4	—	—	—	—	—	0.0	2	6
Days with low ≤ 0°C (days)	—	—	—	—	0.1	0.3	1	0.1	0.2	0.0	—	—

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	2	2	4	8	12	16
Days with high ≥ 32°C (days)	9	10	4	0.4	—	—
Days with low ≤ 0°C (days)	—	—	—	—	0.1	0.3

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	18	18	16	9	6	4
Days with high ≥ 32°C (days)	—	—	—	0.0	2	6
Days with low ≤ 0°C (days)	1	0.1	0.2	0.0	—	—

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	49	48	54	63	68	72	72	71	71	65	60	53
Clear days (≤ 30% cloud)	7	7	6	4	2	1	2	2	2	3	4	6
Partly cloudy days (30–70%)	18	15	16	12	12	10	10	10	9	12	14	17
Cloudy days (≥ 70%)	6	6	9	14	17	19	20	19	19	15	12	8
Relative humidity (%)	54	54	59	66	73	79	82	82	80	76	68	58
Wind speed (mph)	9.7	9.6	8.8	7.4	7.4	7.8	7.9	7.8	7.9	7.8	8.6	9.2

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	49	48	54	63	68	72
Clear days (≤ 30% cloud)	7	7	6	4	2	1
Partly cloudy days (30–70%)	18	15	16	12	12	10
Cloudy days (≥ 70%)	6	6	9	14	17	19
Relative humidity (%)	54	54	59	66	73	79
Wind speed (mph)	9.7	9.6	8.8	7.4	7.4	7.8

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	72	71	71	65	60	53
Clear days (≤ 30% cloud)	2	2	2	3	4	6
Partly cloudy days (30–70%)	10	10	9	12	14	17
Cloudy days (≥ 70%)	20	19	19	15	12	8
Relative humidity (%)	82	82	80	76	68	58
Wind speed (mph)	7.9	7.8	7.9	7.8	8.6	9.2

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 25 years of daily observations at Bunbury, a weather station, about 3 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 →