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Kalgoorlie, Western Australia climate

BSh Hot semi-arid

Kalgoorlie has a seasonal warm-temperate climate (Hot semi-arid, Köppen BSh). The hottest month is January with an average daily high near 93°F, while the coldest is July averaging around 42°F at night. Around 10 inches of precipitation falls each year, peaking in February (1.4 inches) and easing off in September (0.5 inches).

☀️ Summers

Hot

Highs near 93°F in January.

About 79 days a year above 90 °F

❄️ Winters

Cool

Lows near 42°F in July.

About 2 freezing nights a year

🌧️ Rain

Fairly dry

About 10 in of rain a year.

Wettest in February

⛅ Sky & trend

Fairly sunny

More sun than cloud through the year.

+0.8 °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

Kalgoorlie climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	93	90	84	78	70	64	64	67	73	80	85	90
Avg temp (°F)	79	78	73	67	59	54	53	55	60	67	72	76
Avg low (°F)	66	65	61	56	49	44	42	43	47	54	59	63
Precipitation (in)	1.4	1.4	1.2	0.8	0.7	0.8	0.8	0.8	0.5	0.5	0.7	0.7

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	93	90	84	78	70	64
Avg temp (°F)	79	78	73	67	59	54
Avg low (°F)	66	65	61	56	49	44
Precipitation (in)	1.4	1.4	1.2	0.8	0.7	0.8

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	64	67	73	80	85	90
Avg temp (°F)	53	55	60	67	72	76
Avg low (°F)	42	43	47	54	59	63
Precipitation (in)	0.8	0.8	0.5	0.5	0.7	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)	4	5	5	5	5	7	6	7	5	4	4	4
Days with high ≥ 90°F (days)	20	15	10	3	0.1	—	—	0.0	0.9	6	10	15
Days with low ≤ 32°F (days)	—	—	—	—	—	0.4	1	0.6	0.1	—	—	—

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	4	5	5	5	5	7
Days with high ≥ 90°F (days)	20	15	10	3	0.1	—
Days with low ≤ 32°F (days)	—	—	—	—	—	0.4

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	6	7	5	4	4	4
Days with high ≥ 90°F (days)	—	0.0	0.9	6	10	15
Days with low ≤ 32°F (days)	1	0.6	0.1	—	—	—

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	38	44	42	42	40	39	36	35	33	36	38	36
Clear days (≤ 30% cloud)	15	12	14	13	14	14	15	16	16	16	15	16
Partly cloudy days (30–70%)	10	9	9	9	10	10	11	10	9	9	9	10
Cloudy days (≥ 70%)	6	8	8	8	7	6	5	5	4	6	6	6
Relative humidity (%)	39	44	49	54	60	67	67	62	55	46	42	38
Wind speed (mph)	9.1	8.8	7.8	6.6	6.2	6.5	6.6	7.0	7.8	8.2	8.7	8.9

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	38	44	42	42	40	39
Clear days (≤ 30% cloud)	15	12	14	13	14	14
Partly cloudy days (30–70%)	10	9	9	9	10	10
Cloudy days (≥ 70%)	6	8	8	8	7	6
Relative humidity (%)	39	44	49	54	60	67
Wind speed (mph)	9.1	8.8	7.8	6.6	6.2	6.5

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	36	35	33	36	38	36
Clear days (≤ 30% cloud)	15	16	16	16	15	16
Partly cloudy days (30–70%)	11	10	9	9	9	10
Cloudy days (≥ 70%)	5	5	4	6	6	6
Relative humidity (%)	67	62	55	46	42	38
Wind speed (mph)	6.6	7.0	7.8	8.2	8.7	8.9

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Kalgoorlie-boulder Airport, a weather station, about 5 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 →