Climate JASDF Abashiri Sub Base Heliport 2020-2024

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

Calculated from historical METAR data of Memanbetsu Airport (RJCM) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	72.9	51	78	65	82	77
February	74.6	61	65	72	85	77
March	78.6	80	76	75	79	80
April	84.4		79	92	81	74
May	82.4		89	85	69	83
June	71.0		84	55	81	68
July	77.6		71	77	97	66
August	77.8		75	88	81	87
September	91.8		83	97	94	84
October	89.5		81	91	94	93
November	89.4		85	92	81	87
December	86.9		78	97	91	89
Average	79.3	64.3	78.5	80.9	84.3	79.6

41st 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	83.6	76	84	80	85	86
February	84.8	74	77	81	91	90
March	90.3	91	95	85	88	89
April	95.4		91	97	92	94
May	95.2		99	92	88	100
June	91.6		93	84	95	95
July	94.6		94	91	100	93
August	95.6		97	95	93	97
September	97.8		96	99	99	94
October	97.6		96	98	100	100
November	98.7		99	99	98	99
December	92.6		86	99	93	92
Average	91.8	80.4	92.4	91.1	93.3	94.0

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	-3.0	-3	-4	-3	-3	-2
February	-3.6	-2	-2	-2	-1	-3
March	4.1	2	8	4	5	5
April	11.7		13	14	11	9
May	17.9		19	20	15	18
June	20.3		23	19	22	21
July	25.1		26	25	29	23
August	24.7		28	25	25	27
September	22.1		24	23	20	22
October	15.4		16	16	15	16
November	8.2		10	9	9	8
December	0.3		0	1	2	-1
Average	10.5	-1.1	13.4	12.9	12.5	11.8

71st 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	-12.0	-11	-14	-11	-14	-10
February	-11.1	-11	-11	-10	-10	-11
March	-3.6	-5	0	-2	-2	-1
April	3.9		5	5	4	2
May	9.9		10	11	9	9
June	13.5		16	12	15	15
July	18.5		20	18	21	17
August	18.6		22	19	18	19
September	15.3		18	16	14	16
October	8.0		9	8	8	8
November	0.6		2	1	2	1
December	-9.6		-8	-8	-7	-9
Average	3.0	-9.1	5.6	5.4	4.8	4.8

5th 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	34.2	46	32	45	28	31
February	33.8	46	35	44	26	36
March	23.9	28	19	29	22	20
April	16.1		24	6	20	28
May	17.3		9	21	33	14
June	19.1		12	22	8	19
July	13.6		19	14	3	13
August	18.2		18	20	19	11
September	12.3		15	11	11	21
October	18.0		23	21	17	13
November	14.8		11	18	28	18
December	18.2		25	9	17	21
Average	21.8	39.4	19.5	21.6	18.7	19.8

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	5.9	7	5	7	6	6
February	6.4	7	6	6	7	6
March	8.0	9	8	8	9	7
April	9.9		10	11	11	9
May	9.2		9	10	10	9
June	8.2		9	8	8	9
July	7.3		5	8	9	6
August	8.0		9	9	8	8
September	7.5		7	8	9	8
October	7.0		7	7	6	7
November	6.7		8	6	7	6
December	5.8		5	7	6	5
Average	7.6	7.6	7.5	8.0	8.0	7.3

71st 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	325°	318°	322°	256°	340°
February	357°	356°	346°	326°	348°
March	011°	159°	012°	344°	343°
April		307°	036°	047°	032°
May		110°	161°	028°	032°
June		126°	068°	046°	133°
July		041°	098°	159°	071°
August		161°	173°	124°	125°
September		181°	169°	122°	153°
October		296°	208°	193°	177°
November		239°	260°	241°	306°
December		244°	236°	231°	315°

Prevailing wind direction

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