Statistics St. John's International Airport 2019-2023

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

Calculated from historical METAR data of St. John's International Airport (CYYT) between 2019 and 2023.

VFR conditions (%)

Month	Average	2023	2022	2021	2020	2019
January	36.3	29	39	20	42	42
February	42.8	38	48	39	49	43
March	42.8	26	48	54	50	71
April	42.0	34	28	33	62	49
May	53.7	48	67	61	60	38
June	57.1		55	64	52	52
July	57.5		66	50	45	47
August	57.3		45	59	66	61
September	57.5		40	53	70	58
October	53.8		66	35	51	55
November	48.8		41	53	50	45
December	33.0		10	39	36	28
Average	48.6	35.9	48.5	48.4	53.8	49.8

243rd best VFR conditions of Canada

VFR conditions during daylight period

Percentage of observations where the VFR minimums for ceiling and visibility are met:

• Visibility: 5 mi or more
• Ceiling: 3,000 ft or more

Only observations between sunrise and sunset are taken into account.

Marginal VFR conditions (%)

Month	Average	2023	2022	2021	2020	2019
January	70.3	70	65	51	80	72
February	73.5	64	81	70	76	87
March	66.9	47	74	78	63	85
April	62.1	57	46	50	75	69
May	70.9	66	76	79	80	66
June	67.9		66	75	65	62
July	70.8		83	66	59	63
August	76.2		64	80	81	80
September	75.2		61	77	84	78
October	75.9		72	68	74	84
November	71.7		70	72	76	66
December	66.0		26	72	64	76
Average	69.7	60.2	67.0	70.4	72.6	73.1

Marginal VFR conditions or better during daylight period

Percentage of observations where the MVFR minimums for ceiling and visibility are met:

• Visibility: 3⅛ mi or more
• Ceiling: 1,000 ft or more

Only observations between sunrise and sunset are taken into account.

Maximum temperatures (°C)

Month	Average	2023	2022	2021	2020	2019
January	0.6	2	2	0	-2	0
February	-1.3	-3	2	0	-1	-3
March	1.2	-1	2	3	0	1
April	5.3	4	5	6	4	5
May	9.8	10	11	11	11	7
June	16.2		17	18	18	14
July	20.4		23	20	18	19
August	21.3		22	21	22	21
September	17.0		18	19	19	15
October	11.5		15	10	12	10
November	6.9		7	8	7	8
December	2.2		3	2	5	2
Average	8.5	2.6	10.8	9.9	9.5	8.3

205th highest temperature of Canada

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°C)

Month	Average	2023	2022	2021	2020	2019
January	-6.6	-4	-6	-3	-7	-6
February	-8.6	-10	-6	-5	-8	-10
March	-5.4	-4	-5	-4	-6	-6
April	-2.9	-2	-1	1	-2	-2
May	1.5	2	2	3	2	1
June	7.3		9	8	10	6
July	11.8		14	11	11	11
August	13.4		15	13	13	13
September	9.9		12	10	11	9
October	5.3		7	6	6	4
November	0.5		0	2	0	1
December	-3.2		0	-4	0	-4
Average	1.6	-4.6	3.6	3.2	2.5	1.5

435th lowest temperature of Canada

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month	Average	2023	2022	2021	2020	2019
January	37.1	37	44	43	33	40
February	40.9	53	41	40	39	30
March	32.2	46	36	25	36	15
April	28.0	33	32	36	18	25
May	18.9	27	18	10	13	21
June	18.3		22	14	20	20
July	14.9		8	20	21	16
August	12.2		16	6	11	10
September	19.3		31	11	12	18
October	18.4		9	30	23	15
November	27.2		32	25	21	35
December	38.9		52	39	34	34
Average	25.3	37.8	26.0	22.7	21.9	21.6

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	2023	2022	2021	2020	2019
January	15.2	15	17	14	13	15
February	17.5	17	17	18	19	19
March	16.3	16	17	17	17	15
April	15.0	15	14	14	15	17
May	14.0	15	11	15	16	13
June	12.6		12	13	12	11
July	12.0		13	12	11	10
August	11.8		11	13	12	11
September	13.0		14	12	14	13
October	12.9		12	14	13	12
November	15.8		16	14	15	18
December	15.4		14	17	14	16
Average	14.2	15.8	13.8	14.2	14.0	13.6

205th highest wind speed of Canada

Average wind speed

Excluding wind gusts. Only observations between sunrise and sunset are taken into account.

Prevailing wind direction

Month	2023	2022	2021	2020	2019
January	264°	235°	340°	303°	240°
February	310°	271°	295°	279°	278°
March	353°	262°	270°	297°	251°
April	336°	291°	114°	271°	266°
May	270°	282°	275°	263°	340°
June		261°	261°	244°	236°
July		250°	251°	256°	259°
August		261°	277°	260°	237°
September		278°	253°	253°	276°
October		270°	338°	255°	289°
November		280°	230°	269°	245°
December		082°	279°	255°	282°

Prevailing wind direction

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