Climate 1-chome-2-1 Tomobuchicho Helipad 2020-2024

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

Calculated from historical METAR data of Osaka International Airport (RJOO) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	93.7	94	88	95	93	93
February	91.3	80	90	99	99	92
March	90.9	79	94	90	90	93
April	90.5		86	88	90	93
May	91.8		89	95	86	94
June	89.0		88	93	92	83
July	88.0		89	91	92	77
August	93.9		94	94	86	98
September	94.6		97	94	95	97
October	92.9		98	94	98	95
November	94.6		93	93	96	92
December	96.0		93	99	99	98
Average	91.3	84.3	91.4	93.3	92.5	91.6

6th best VFR conditions of Japan

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	98.7	100	97	99	96	100
February	98.3	99	97	100	100	99
March	98.1	94	100	97	97	99
April	97.1		96	97	96	98
May	97.2		96	98	94	99
June	96.3		95	99	99	94
July	97.0		98	98	97	94
August	97.8		95	98	96	100
September	99.1		100	98	100	100
October	98.5		100	99	100	99
November	98.1		98	95	99	99
December	99.6		100	100	100	100
Average	97.9	97.3	97.6	97.9	97.7	98.1

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	9.5	10	10	9	9	12
February	10.5	12	10	10	12	11
March	15.0	13	18	15	17	15
April	19.8		20	21	20	18
May	24.7		24	24	24	25
June	27.8		27	28	28	28
July	31.7		33	32	32	29
August	33.6		35	33	32	35
September	29.4		32	30	29	30
October	23.1		24	23	24	22
November	17.9		18	19	18	18
December	12.0		13	12	12	12
Average	20.1	11.6	22.0	21.7	21.4	21.3

19th highest temperature of Japan

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	1.8	2	1	1	2	5
February	2.5	4	2	1	4	3
March	5.9	5	6	7	8	7
April	10.7		11	12	11	9
May	15.7		16	15	16	16
June	20.0		20	21	20	21
July	24.9		25	25	25	23
August	26.1		27	26	25	26
September	22.0		24	23	22	22
October	15.0		14	14	15	14
November	8.9		9	10	9	10
December	3.8		4	3	4	3
Average	12.0	3.9	13.2	13.5	13.4	13.3

37th lowest temperature of Japan

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	13.1	14	12	14	15	8
February	13.9	23	18	11	5	16
March	15.0	19	10	15	16	18
April	13.9		17	13	16	13
May	13.6		15	12	23	12
June	15.8		21	15	13	19
July	16.8		11	16	15	36
August	9.7		8	7	24	3
September	13.7		6	12	19	16
October	13.9		5	11	6	14
November	7.3		11	14	6	8
December	6.8		4	4	6	6
Average	13.6	18.6	11.5	12.4	14.0	14.4

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	6.4	7	6	7	6	7
February	6.8	8	7	7	7	6
March	7.6	9	7	7	8	7
April	7.8		8	8	8	8
May	6.9		7	6	7	7
June	6.6		6	8	5	7
July	6.3		6	6	7	6
August	7.4		8	7	7	6
September	7.1		7	8	6	7
October	6.8		7	6	7	7
November	5.7		6	5	6	6
December	5.8		6	5	7	5
Average	6.9	7.8	6.7	6.8	6.6	6.6

19th highest wind speed of Japan

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	319°	306°	310°	290°	329°
February	347°	336°	291°	293°	315°
March	323°	320°	312°	332°	311°
April		311°	329°	335°	283°
May		298°	247°	225°	238°
June		233°	239°	229°	251°
July		238°	234°	206°	234°
August		115°	240°	213°	232°
September		312°	039°	036°	351°
October		336°	349°	333°	360°
November		310°	010°	309°	333°
December		292°	293°	292°	291°

Prevailing wind direction

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