Climate Caernarfon Airport 2020-2024

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

Calculated from historical METAR data of Caernarfon Airport (EGCK) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	53.1	63	53	49	42	47
February	59.2	51	63	52	63	57
March	66.4	71	46	83	50	78
April	79.1		73	80	93	86
May	78.1		83	75	70	84
June	72.9		81	78	71	55
July	66.2		66	71	69	50
August	64.7		66	81	60	63
September	70.4		76	82	65	74
October	62.0		75	75	47	61
November	58.1		56	70	44	52
December	49.9		46	85	46	47
Average	64.5	61.3	67.3	74.2	62.2	64.6

69th best VFR conditions of United Kingdom

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	86.9	88	90	93	79	72
February	86.4	74	93	88	84	89
March	90.1	97	84	95	81	92
April	94.0		90	97	100	97
May	93.7		94	93	93	96
June	89.2		92	98	82	85
July	87.9		90	93	91	72
August	88.9		94	92	88	85
September	91.1		92	94	95	90
October	89.5		91	95	80	91
November	91.2		95	96	87	86
December	86.4		87	96	83	90
Average	89.0	85.9	91.2	94.1	87.7	87.4

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	8.4	9	9	9	7	9
February	9.3	10	10	10	8	9
March	10.3	11	10	12	10	11
April	13.1		13	13	12	15
May	15.5		17	16	14	17
June	18.5		21	17	18	17
July	19.6		19	20	21	17
August	19.2		19	21	19	19
September	17.9		20	18	18	17
October	14.5		16	16	15	13
November	11.3		11	13	11	12
December	9.2		10	7	10	9
Average	13.1	9.7	14.4	14.5	13.5	13.8

55th highest temperature of United Kingdom

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	4.1	4	5	4	3	5
February	4.7	6	5	6	4	5
March	4.4	5	5	4	5	4
April	5.5		6	6	2	7
May	8.0		9	10	7	8
June	10.9		13	11	11	11
July	12.9		14	13	13	13
August	13.4		14	14	13	14
September	11.4		14	11	12	11
October	9.6		10	11	11	9
November	6.6		6	8	7	7
December	5.1		7	0	5	5
Average	7.5	4.8	8.8	8.3	7.7	8.1

66th lowest temperature of United Kingdom

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	14.3	18	12	5	20	20
February	15.2	20	4	18	20	20
March	11.6	10	20	8	7	5
April	7.9		9	4	3	5
May	7.1		4	5	18	1
June	7.6		5	6	8	12
July	8.9		15	6	4	17
August	8.9		8	5	8	14
September	9.7		12	9	8	8
October	14.5		10	10	20	20
November	15.5		13	15	14	16
December	18.0		21	5	15	21
Average	11.9	16.0	10.5	7.5	11.0	12.0

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	12.4	13	14	11	11	14
February	14.2	12	11	18	13	20
March	12.1	11	13	10	12	13
April	9.7		10	11	9	9
May	10.1		9	11	11	11
June	10.0		9	11	10	11
July	9.9		13	9	8	11
August	10.7		11	9	11	11
September	10.6		10	10	9	11
October	12.7		11	14	14	14
November	12.6		13	14	12	13
December	12.6		15	7	12	12
Average	11.5	12.0	11.3	11.1	10.6	12.2

55th highest wind speed of United Kingdom

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	205°	231°	237°	280°	206°
February	215°	208°	239°	168°	230°
March	176°	204°	147°	231°	222°
April		208°	279°	359°	307°
May		359°	222°	235°	254°
June		248°	222°	262°	250°
July		221°	254°	270°	235°
August		237°	249°	243°	217°
September		216°	324°	231°	230°
October		187°	205°	220°	263°
November		260°	202°	265°	216°
December		228°	126°	228°	225°

Prevailing wind direction

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