Climate Chiang Klang 2020-2024

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

Calculated from historical METAR data of Nan Airport (VTCN) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	83.0	92	92	94	88	78
February	82.7	88	76	88	88	86
March	58.4	69	43	85	78	62
April	72.6		50	76	79	84
May	93.1		95	97	98	98
June	82.1		88	93	94	87
July	77.0		86	88	94	96
August	70.2		76	77	92	75
September	77.1		75	81	86	80
October	82.4		85	90	90	95
November	87.2		87	86	86	96
December	84.1		85	85	89	92
Average	78.8	83.0	78.0	86.6	88.6	85.4

15th 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	94.9	97	98	99	99	94
February	96.5	99	93	99	100	99
March	88.3	95	79	97	97	93
April	93.8		83	95	96	95
May	99.6		100	100	100	100
June	99.2		100	99	100	99
July	98.5		99	98	99	100
August	98.2		99	98	100	97
September	96.8		99	98	100	95
October	94.6		96	94	98	98
November	92.0		91	90	91	98
December	92.7		89	92	96	95
Average	95.4	96.7	93.7	96.8	97.9	96.8

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	30.0	30	30	31	29	32
February	32.8	34	33	31	32	33
March	35.7	36	35	35	36	37
April	35.6		39	34	33	37
May	35.2		37	33	35	37
June	33.4		34	34	33	34
July	32.2		33	33	32	33
August	31.2		31	31	33	30
September	32.0		32	32	32	32
October	31.7		32	31	32	31
November	31.4		32	32	31	32
December	29.5		30	30	29	30
Average	32.6	33.5	33.1	32.2	32.2	33.0

12th 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	15.1	16	13	15	13	15
February	15.7	16	15	17	15	15
March	19.2	20	18	22	20	20
April	22.1		23	22	22	22
May	24.5		25	24	24	25
June	24.8		25	24	25	25
July	24.4		25	24	24	25
August	24.2		25	24	24	24
September	23.9		24	24	24	25
October	22.5		23	21	23	22
November	19.6		20	20	20	19
December	15.5		17	18	14	14
Average	20.5	17.3	21.0	21.3	20.6	20.9

4th 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	1.3	2	0	1	0	0
February	0.6	0	0	4	1	0
March	0.7	0	1	2	0	0
April	2.4		1	1	8	2
May	2.4		3	5	1	2
June	6.0		7	2	8	8
July	8.9		6	6	8	2
August	13.2		18	10	7	20
September	7.1		12	9	8	7
October	3.2		2	4	5	3
November	0.7		1	1	0	0
December	0.7		0	0	0	0
Average	3.7	0.9	4.3	4.0	3.9	3.7

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	2.8	3	3	3	3	2
February	3.3	4	4	4	4	3
March	3.8	4	4	4	4	4
April	3.7		5	4	4	5
May	4.0		4	4	4	4
June	4.6		5	5	5	4
July	4.1		4	4	5	4
August	4.0		4	4	4	4
September	3.2		3	4	3	3
October	3.0		3	3	3	3
November	2.8		3	3	3	3
December	2.7		3	3	3	3
Average	3.5	3.6	3.7	3.7	3.6	3.6

12th 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	179°	094°	186°	173°	183°
February	183°	184°	189°	188°	198°
March	181°	178°	180°	164°	190°
April		185°	026°	192°	187°
May		193°	194°	215°	206°
June		192°	190°	193°	197°
July		187°	186°	187°	189°
August		180°	181°	197°	183°
September		155°	179°	008°	178°
October		127°	035°	008°	025°
November		042°	049°	299°	037°
December		078°	178°	006°	060°

Prevailing wind direction

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