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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 86°F, while the coldest is July averaging around 45°F at night. Precipitation totals about 28 inches a year and is strongly seasonal — July alone averages 5.5 inches while February barely receives 0.28 inches.

☀️ Summers

Warm

Highs near 86°F in February.

About 31 days a year above 90 °F

❄️ Winters

Cool

Lows near 45°F in July.

About 2 freezing nights a year

🌧️ Rain

Moderate rainfall

About 28 in of rain a year.

Wettest in July

⛅ Sky & trend

Often cloudy

Cloudy skies much of the year.

+0.0 °F 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 (°F)	85	86	82	76	70	65	63	64	65	70	76	81
Avg temp (°F)	73	73	70	64	59	56	54	55	56	60	65	69
Avg low (°F)	60	61	58	53	48	46	45	46	47	49	54	56
Precipitation (in)	0.5	0.3	0.8	1.4	3.8	5.4	5.5	4.7	3.2	1.3	0.9	0.7

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	85	86	82	76	70	65
Avg temp (°F)	73	73	70	64	59	56
Avg low (°F)	60	61	58	53	48	46
Precipitation (in)	0.5	0.3	0.8	1.4	3.8	5.4

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	63	64	65	70	76	81
Avg temp (°F)	54	55	56	60	65	69
Avg low (°F)	45	46	47	49	54	56
Precipitation (in)	5.5	4.7	3.2	1.3	0.9	0.7

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 ≥ 90°F (days)	9	10	4	0.4	—	—	—	—	—	0.0	2	6
Days with low ≤ 32°F (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 ≥ 90°F (days)	9	10	4	0.4	—	—
Days with low ≤ 32°F (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 ≥ 90°F (days)	—	—	—	0.0	2	6
Days with low ≤ 32°F (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 →