Climate Varstu Airfield 2020-2024

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

Calculated from historical METAR data of Tartu Airport (EETU) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	28.2	32	26	32	23	26
February	38.5	31	36	43	37	49
March	64.2	60	49	82	60	73
April	77.5		85	80	75	81
May	87.2		96	89	76	89
June	89.3		95	91	94	79
July	87.2		86	92	97	87
August	82.2		72	85	70	89
September	75.2		76	77	69	73
October	54.0		48	56	76	58
November	27.2		32	10	28	36
December	26.0		25	24	35	19
Average	66.2	43.6	68.6	72.6	68.8	70.7

5th best VFR conditions of Estonia

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	55.9	58	57	55	52	62
February	66.2	56	65	69	71	79
March	83.0	82	79	91	75	88
April	90.9		90	91	94	93
May	96.1		100	97	89	98
June	95.4		97	98	99	89
July	94.9		95	97	98	98
August	91.7		85	91	87	97
September	89.4		90	95	87	87
October	79.1		84	76	89	83
November	57.0		59	44	55	69
December	48.8		52	41	57	39
Average	82.3	67.7	84.2	85.4	84.2	86.4

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	-2.8	-5	0	0	-3	4
February	-1.6	0	0	1	-4	3
March	4.0	6	3	5	4	6
April	10.1		12	9	10	9
May	16.1		17	15	15	14
June	21.9		22	22	25	23
July	22.3		21	23	27	21
August	21.9		23	25	19	21
September	16.2		20	13	13	18
October	9.9		8	11	11	12
November	4.0		2	3	5	6
December	-1.5		-2	-4	-4	1
Average	9.2	0.3	10.5	10.7	9.9	11.4

5th highest temperature of Estonia

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	-6.4	-10	-4	-6	-6	1
February	-6.5	-4	-5	-3	-11	-1
March	-4.9	-1	-3	-4	-4	-2
April	0.5		2	0	1	0
May	4.6		3	5	6	3
June	10.6		9	12	12	13
July	12.4		11	12	15	11
August	12.3		14	14	12	11
September	8.0		10	5	6	10
October	3.9		3	5	4	6
November	0.4		-1	0	0	2
December	-5.6		-6	-10	-10	-2
Average	1.9	-6.9	2.7	2.7	2.3	4.3

2nd lowest temperature of Estonia

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	31.4	42	25	32	36	10
February	26.1	23	35	27	24	21
March	13.3	7	24	6	23	10
April	11.3		13	14	11	14
May	6.9		4	8	17	5
June	5.9		5	7	3	7
July	5.3		6	5	1	8
August	9.1		6	11	14	9
September	8.2		2	10	7	10
October	14.7		19	13	9	10
November	18.6		29	23	27	14
December	27.3		43	46	36	19
Average	13.4	21.0	13.8	12.8	14.0	10.2

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	9.0	9	10	9	7	12
February	8.9	8	9	10	7	11
March	9.2	7	9	8	10	10
April	8.9		7	9	10	11
May	7.8		7	9	8	8
June	7.2		7	7	6	6
July	7.2		8	7	7	8
August	7.1		7	6	9	6
September	8.1		7	7	8	9
October	8.7		11	9	10	8
November	8.2		7	8	9	9
December	7.8		6	6	8	8
Average	8.0	7.8	7.8	7.9	8.1	8.5

5th highest wind speed of Estonia

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	202°	204°	256°	143°	237°
February	157°	257°	216°	275°	227°
March	177°	231°	266°	239°	235°
April		055°	281°	237°	273°
May		253°	258°	219°	292°
June		295°	247°	239°	066°
July		246°	242°	223°	233°
August		163°	170°	214°	248°
September		214°	280°	294°	227°
October		240°	233°	209°	175°
November		176°	162°	234°	208°
December		208°	145°	244°	158°

Prevailing wind direction

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