Climate Khun Yuam (for Emergency) 2020-2024

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

Calculated from historical METAR data of Mae Hong Son Airport (VTCH) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	75.8	75	80	88	75	81
February	54.0	39	46	69	71	24
March	11.4	10	7	10	2	2
April	36.5		18	33	66	30
May	71.2		68	52	78	79
June	39.8		33	24	32	52
July	39.6		53	36	35	61
August	31.4		27	29	30	35
September	48.3		38	36	41	64
October	54.0		49	43	46	54
November	69.0		74	63	75	71
December	69.0		69	68	73	76
Average	48.5	40.1	46.2	44.1	51.0	52.1

35th best VFR conditions of Thailand

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	88.6	84	88	97	91	89
February	82.2	89	80	95	99	53
March	40.1	36	23	57	36	30
April	68.5		53	84	88	63
May	96.8		98	92	99	98
June	96.4		93	96	98	98
July	95.9		97	91	97	98
August	91.9		87	89	93	88
September	92.2		85	87	94	94
October	89.2		85	85	93	94
November	85.6		88	81	87	84
December	78.7		79	79	77	80
Average	82.8	68.4	79.5	86.3	87.7	81.0

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	29.8	31	31	30	29	32
February	32.5	34	33	33	31	34
March	36.3	37	35	37	38	38
April	37.4		40	36	36	39
May	35.8		37	34	37	37
June	32.6		33	32	32	34
July	32.0		34	33	32	34
August	31.2		31	33	32	31
September	32.1		32	32	32	33
October	32.0		32	32	32	32
November	31.4		32	32	32	31
December	29.5		31	31	30	28
Average	32.8	33.7	33.3	32.9	32.8	33.5

5th highest temperature of Thailand

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	16.2	15	13	15	15	14
February	15.8	13	15	15	14	15
March	19.7	17	18	22	18	19
April	24.2		24	24	22	24
May	24.6		25	25	22	26
June	24.6		25	25	21	26
July	23.0		25	25	13	25
August	24.4		24	24	25	25
September	24.1		24	24	24	25
October	23.1		24	22	23	24
November	20.6		21	20	22	20
December	16.9		19	19	16	15
Average	20.8	15.2	21.4	21.7	19.5	21.3

6th lowest temperature of Thailand

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	0.9	1	0	1	0	0
February	0.8	0	3	2	2	0
March	0.2	0	0	1	0	0
April	1.2		0	1	5	1
May	4.4		4	11	3	3
June	12.9		14	14	13	13
July	16.7		15	17	22	14
August	22.2		25	22	22	26
September	14.8		31	18	13	12
October	10.2		26	14	6	7
November	1.6		1	3	2	1
December	0.8		2	0	0	0
Average	6.8	0.3	10.3	9.0	7.6	6.6

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	1.9	3	2	2	2	1
February	2.0	2	2	2	0	2
March	2.2	3	2	3	2	3
April	3.0		3	3	3	4
May	2.9		3	3	3	3
June	2.8		3	3	3	4
July	2.8		3	3	3	3
August	2.3		3	3	3	3
September	2.1		3	3	3	3
October	2.4		3	3	3	5
November	1.8		2	2	2	2
December	1.6		2	2	2	2
Average	2.4	2.5	2.6	2.6	2.3	2.7

5th highest wind speed of Thailand

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	162°	140°	221°	264°	195°
February	204°	234°	214°	228°	229°
March	221°	232°	222°	241°	228°
April		218°	290°	260°	234°
May		207°	200°	176°	226°
June		201°	210°	195°	216°
July		186°	178°	199°	213°
August		192°	190°	206°	232°
September		258°	184°	207°	218°
October		165°	136°	243°	258°
November		203°	260°	215°	270°
December		189°	222°	253°	236°

Prevailing wind direction

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