Climate Silent Grove Airport 2020-2024

Climate and trends: average temperature, flight conditions, precipitation, wind speed and direction.

Calculated from historical METAR data of RAAF Base Curtin (YCIN) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	76.1	92	68	87	92	93
February	76.8	95	93	86	95	89
March	79.5	80	93	92	88	98
April	96.2		96	99	100	98
May	97.9		99	99	100	91
June	96.7		90	98	98	100
July	98.9		96	100	99	100
August	99.5		100	99	100	99
September	95.7		99	97	100	75
October	98.4		99	97	100	94
November	98.3		98	94	99	100
December	96.0		98	100	99	90
Average	91.4	88.8	93.4	95.2	97.3	93.9

19th best VFR conditions of Australia

VFR conditions during daylight period

Percentage of observations where the VFR minimums for ceiling and visibility are met: visibility of 8 km or more and a ceiling of 3,000 ft or more. Only observations between sunrise and sunset are taken into account.

Marginal VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	83.2	99	88	95	96	99
February	81.9	99	99	96	98	97
March	84.3	96	98	97	98	99
April	97.2		99	99	100	99
May	98.5		100	100	100	93
June	98.0		97	99	99	100
July	99.6		100	100	99	100
August	99.6		100	99	100	100
September	95.9		99	98	100	75
October	99.1		100	99	100	96
November	99.5		100	99	100	100
December	98.4		100	100	99	96
Average	94.3	97.9	97.9	98.3	99.0	96.1

Marginal VFR conditions or better during daylight period

Percentage of observations where the MVFR minimums for ceiling and visibility are met: visibility of 5 km or more and a ceiling of 1,000 ft or more. Only observations between sunrise and sunset are taken into account.

Maximum temperatures (°C)

Month	Average	2024	2023	2022	2021	2020
January	35.1	38	33	36	37	35
February	35.2	38	36	35	34	36
March	35.5	33	36	36	34	37
April	35.8		33	38	36	37
May	32.7		31	35	33	31
June	30.4		29	32	30	31
July	31.0		29	30	32	31
August	33.0		33	33	34	34
September	36.6		36	37	36	38
October	38.6		39	36	39	38
November	38.9		39	36	39	40
December	38.9		41	39	40	35
Average	35.2	36.3	34.7	35.0	35.2	35.2

7th highest temperature of Australia

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°C)

Month	Average	2024	2023	2022	2021	2020
January	25.3	27	24	26	26	26
February	25.0	26	25	25	24	26
March	24.5	25	25	25	24	25
April	22.7		22	23	22	23
May	18.8		18	20	19	20
June	17.3		18	18	18	18
July	15.7		16	13	17	16
August	16.5		18	18	18	16
September	18.9		18	20	19	20
October	22.1		23	23	21	22
November	24.5		25	24	24	25
December	25.6		26	25	26	25
Average	21.9	26.0	21.3	21.3	21.5	21.6

72nd lowest temperature of Australia

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	9.0	4	23	12	8	9
February	3.8	2	7	9	5	4
March	3.1	9	1	5	4	2
April	1.0		4	0	0	0
May	1.4		0	2	0	8
June	1.2		7	0	1	0
July	0.0		0	0	0	0
August	0.0		0	0	0	0
September	0.2		0	2	0	0
October	0.3		0	2	0	0
November	1.0		0	5	0	0
December	3.1		0	0	0	11
Average	2.5	4.9	3.9	3.2	1.6	2.9

Precipitation during daylight period

Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.

Wind speed (knots)

Month	Average	2024	2023	2022	2021	2020
January	8.4	9	9	8	8	9
February	7.6	8	7	8	7	9
March	6.9	7	7	7	7	7
April	7.3		8	7	8	7
May	8.4		10	7	7	8
June	8.4		8	9	9	8
July	8.2		9	9	8	9
August	8.7		8	9	9	8
September	8.0		7	8	8	8
October	8.3		9	9	8	8
November	8.2		9	8	9	8
December	8.0		9	8	8	8
Average	8.0	8.0	8.3	8.0	7.9	8.0

7th highest wind speed of Australia

Average wind speed

Excluding wind gusts. Only observations between sunrise and sunset are taken into account.

Prevailing wind direction

Month	2024	2023	2022	2021	2020
January	301°	292°	291°	280°	337°
February	283°	263°	284°	254°	301°
March	324°	243°	022°	100°	244°
April		101°	132°	106°	127°
May		104°	092°	082°	104°
June		131°	119°	128°	107°
July		115°	113°	138°	117°
August		083°	117°	123°	101°
September		040°	233°	134°	156°
October		049°	269°	269°	270°
November		313°	301°	270°	251°
December		267°	283°	313°	227°

Prevailing wind direction

Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.