Climate North Karelia Central Hospital Heliport 2020-2024

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

Calculated from historical METAR data of Joensuu Airport (EFJO) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	28.5	43	17	27	18	32
February	38.3	34	42	29	39	35
March	58.8	43	61	71	61	63
April	77.3		91	77	70	78
May	83.4		89	86	74	90
June	90.9		94	85	96	89
July	81.9		75	87	94	79
August	78.0		78	85	66	84
September	56.8		52	61	64	65
October	32.0		40	32	25	28
November	21.3		20	13	20	39
December	21.1		36	15	37	17
Average	62.6	40.2	67.5	67.2	64.8	67.8

15th 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	48.9	56	38	52	43	55
February	59.3	52	62	51	59	60
March	76.3	65	78	88	80	76
April	87.9		94	90	86	91
May	91.6		95	96	87	95
June	96.2		97	95	98	95
July	93.9		90	94	98	92
August	90.7		91	92	86	94
September	79.2		76	86	85	84
October	64.9		75	59	69	55
November	46.5		50	25	54	68
December	45.2		65	43	59	39
Average	78.2	58.6	82.4	81.6	81.8	82.0

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	-5.1	-9	-2	-5	-6	0
February	-5.5	-6	-3	-3	-10	-1
March	0.1	1	-1	2	0	2
April	6.0		8	5	7	4
May	13.4		15	13	14	12
June	19.8		20	20	24	21
July	21.0		19	22	25	20
August	19.5		21	22	18	19
September	13.0		17	11	10	15
October	6.2		4	7	8	8
November	0.8		-3	0	1	4
December	-4.6		-7	-5	-7	-1
Average	5.9	-5.4	7.2	7.8	6.9	8.6

16th 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	-11.5	-18	-7	-11	-11	-4
February	-12.9	-12	-10	-9	-17	-6
March	-8.2	-5	-10	-8	-9	-5
April	-3.0		-4	-4	-2	-4
May	3.1		4	2	4	1
June	9.1		8	7	13	11
July	11.0		11	7	14	11
August	10.4		11	9	11	10
September	6.3		10	5	4	7
October	1.6		-1	3	4	4
November	-3.3		-6	-4	-3	0
December	-8.8		-11	-9	-13	-4
Average	-2.6	-12.4	-1.5	-1.2	-1.6	1.7

10th 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	47.7	43	45	45	70	33
February	43.6	41	36	50	58	34
March	25.2	22	38	20	25	17
April	13.7		7	15	15	18
May	11.4		9	10	14	10
June	8.6		8	12	2	8
July	10.8		22	10	5	14
August	9.2		10	4	15	4
September	13.6		15	12	16	13
October	22.6		25	15	25	23
November	33.2		51	42	31	23
December	52.1		73	48	67	38
Average	20.4	32.9	21.4	17.4	20.5	15.8

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	7.0	6	9	8	6	9
February	7.4	8	8	8	7	10
March	7.5	6	8	8	9	9
April	6.6		6	7	7	8
May	6.8		7	7	7	7
June	6.7		6	7	7	7
July	6.1		6	6	6	7
August	6.5		7	7	8	6
September	6.8		7	6	7	9
October	7.3		8	8	9	7
November	7.1		7	6	8	9
December	6.7		6	6	7	8
Average	6.8	6.8	6.8	6.9	7.1	7.5

16th 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°	188°	265°	104°	236°
February	180°	221°	191°	020°	223°
March	201°	246°	255°	235°	240°
April		080°	172°	214°	298°
May		234°	277°	135°	308°
June		283°	218°	203°	131°
July		257°	218°	257°	217°
August		146°	177°	155°	256°
September		204°	025°	322°	212°
October		299°	231°	191°	156°
November		077°	147°	254°	207°
December		092°	148°	188°	155°

Prevailing wind direction

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