Climate Shinshu-Matsumoto Airport 2020-2024

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

Calculated from historical METAR data of Shinshu-Matsumoto Airport (RJAF) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	91.6	85	94	95	82	91
February	90.1	69	91	91	96	97
March	87.7	85	88	88	95	84
April	93.6		94	90	94	92
May	96.0		93	97	96	98
June	93.7		92	94	99	88
July	97.1		99	100	96	95
August	96.8		99	99	92	97
September	88.9		97	85	89	92
October	88.0		92	95	93	90
November	94.7		99	88	94	98
December	93.6		94	93	88	92
Average	91.4	79.6	94.3	92.9	92.7	92.7

7th 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	96.8	93	99	98	94	96
February	95.3	88	95	93	99	100
March	94.9	90	97	97	100	90
April	97.8		99	97	99	97
May	99.1		98	100	100	100
June	98.2		98	97	100	98
July	99.5		100	100	98	100
August	99.4		100	100	96	100
September	97.6		99	96	99	99
October	96.5		98	98	99	98
November	98.0		100	94	98	100
December	97.8		100	96	93	97
Average	96.9	90.3	98.5	97.2	97.8	97.7

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	4.6	6	5	4	4	7
February	6.0	6	6	4	8	8
March	11.3	9	14	12	14	11
April	16.9		18	19	17	15
May	22.2		22	22	21	23
June	25.1		25	26	25	26
July	28.8		31	30	29	26
August	30.5		32	30	29	32
September	25.5		30	26	24	26
October	18.3		19	18	20	17
November	13.5		15	14	13	14
December	7.4		9	7	7	7
Average	16.3	6.9	18.8	17.8	17.5	17.6

57th 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	-2.0	-3	-4	-5	0	1
February	-1.2	-1	-2	-4	2	1
March	3.8	1	5	3	6	5
April	10.0		10	10	10	9
May	16.0		15	14	16	17
June	19.6		20	20	20	21
July	23.6		24	24	24	22
August	25.0		26	23	24	27
September	20.1		22	20	19	21
October	12.4		10	11	13	12
November	6.6		6	6	7	8
December	1.0		0	1	1	0
Average	9.9	-1.2	11.0	10.4	11.8	11.9

20th 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	18.7	19	10	15	33	11
February	20.1	23	19	27	21	18
March	17.0	20	13	13	13	19
April	15.3		16	19	12	14
May	13.8		16	12	21	11
June	15.1		17	11	11	22
July	16.2		7	12	17	42
August	9.1		5	9	22	0
September	13.7		9	14	15	9
October	13.7		9	10	8	15
November	9.0		12	14	9	8
December	16.1		18	20	20	9
Average	15.5	20.5	12.3	14.3	16.9	14.8

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	7.2	8	7	7	8	6
February	7.9	7	8	7	10	9
March	8.3	8	8	9	8	8
April	9.2		10	8	9	10
May	8.3		9	7	10	9
June	7.7		8	9	7	8
July	7.7		9	8	7	10
August	7.9		8	9	8	7
September	7.0		9	6	6	8
October	6.4		6	7	7	5
November	7.1		8	6	8	8
December	7.5		8	9	8	6
Average	7.7	7.7	8.0	7.7	7.9	7.7

57th 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	179°	290°	310°	233°	292°
February	355°	278°	275°	228°	224°
March	263°	284°	271°	129°	235°
April		196°	332°	145°	267°
May		353°	003°	168°	168°
June		171°	192°	138°	160°
July		166°	154°	169°	156°
August		146°	166°	164°	213°
September		162°	342°	056°	158°
October		309°	350°	347°	338°
November		198°	095°	189°	171°
December		205°	213°	221°	310°

Prevailing wind direction

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