Climate Halli Airport 2020-2024

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

Calculated from historical METAR data of Halli Airport (EFHA) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	31.5	42	26	32	21	35
February	42.5	34	42	35	51	39
March	57.3	38	55	70	55	61
April	74.6		85	73	70	75
May	83.3		87	86	75	90
June	87.8		91	80	90	94
July	84.2		81	86	93	80
August	75.7		65	87	58	87
September	59.3		53	66	66	65
October	37.1		44	44	31	35
November	18.5		6	11	23	40
December	19.4		32	21	32	9
Average	61.9	37.8	64.5	67.6	63.6	68.3

17th best VFR conditions of Finland

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	50.1	59	45	53	38	53
February	59.4	50	57	54	65	65
March	74.8	56	75	90	75	72
April	85.3		92	84	81	88
May	91.6		95	93	81	94
June	94.7		97	90	96	97
July	92.9		91	93	96	91
August	88.7		85	94	81	93
September	79.7		76	85	89	84
October	63.0		79	62	59	63
November	41.6		30	31	53	72
December	41.7		54	55	54	25
Average	76.2	54.7	80.1	80.9	78.5	81.3

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	-3.1	-6	-1	-3	-5	2
February	-3.4	-4	-1	-2	-6	1
March	1.2	2	-1	4	1	3
April	7.4		9	6	7	6
May	14.5		15	14	14	13
June	20.6		21	20	24	23
July	21.2		20	21	24	19
August	19.8		20	23	18	20
September	13.7		17	12	11	15
October	7.1		5	9	9	9
November	2.0		-1	2	2	5
December	-3.8		-6	-4	-6	1
Average	7.1	-3.3	8.1	8.8	7.8	9.8

13th highest temperature of Finland

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	-9.8	-14	-5	-9	-9	-2
February	-10.9	-9	-8	-8	-14	-5
March	-7.2	-5	-9	-7	-7	-4
April	-3.4		-3	-4	-2	-2
May	2.9		3	2	4	2
June	8.9		7	5	12	12
July	10.3		11	5	13	11
August	9.7		11	4	11	10
September	6.4		10	3	5	8
October	1.9		-2	3	4	4
November	-2.3		-5	-1	-3	1
December	-6.1		-10	-8	-12	-2
Average	-1.3	-10.5	0.0	-1.0	0.3	2.6

7th lowest temperature of Finland

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	38.4	36	37	36	60	34
February	32.6	35	31	40	35	30
March	21.3	22	34	11	25	22
April	14.1		8	18	18	15
May	10.0		12	13	14	8
June	8.2		9	11	3	6
July	9.4		16	11	5	15
August	10.4		11	6	16	8
September	12.1		9	13	10	9
October	20.4		21	18	21	23
November	28.6		43	28	26	15
December	41.4		53	36	41	50
Average	18.1	29.5	18.8	15.9	17.7	15.9

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	7.3	7	8	9	6	9
February	7.4	7	7	8	6	9
March	8.1	6	8	8	9	9
April	7.3		7	7	7	9
May	7.4		7	8	7	8
June	7.0		6	7	7	6
July	6.3		6	6	6	7
August	7.0		6	7	7	6
September	7.0		7	6	7	8
October	7.4		7	7	9	7
November	6.8		6	7	7	9
December	6.7		6	5	7	7
Average	7.1	6.6	6.8	6.9	7.1	7.6

13th highest wind speed of Finland

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	223°	193°	285°	094°	234°
February	187°	262°	197°	318°	219°
March	171°	263°	264°	266°	231°
April		055°	268°	264°	307°
May		246°	259°	019°	298°
June		291°	228°	223°	133°
July		239°	237°	248°	209°
August		149°	188°	154°	238°
September		210°	035°	312°	225°
October		311°	223°	200°	159°
November		057°	124°	258°	209°
December		081°	125°	285°	152°

Prevailing wind direction

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