Climate Cerklje Air Base 2020-2024

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

Calculated from historical METAR data of Cerklje Air Base (LJCE) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	68.6	77	67	90	66	66
February	80.3	96	90	88	84	98
March	89.7	87	88	97	98	87
April	92.0		90	91	85	97
May	90.5		75	95	90	96
June	95.9		93	96	100	94
July	95.9		95	99	96	98
August	93.9		86	97	96	90
September	85.6		90	84	95	94
October	79.0		89	71	69	85
November	57.9		78	55	58	46
December	62.1		74	21	58	39
Average	85.0	86.8	85.3	86.1	85.3	85.1

4th best VFR conditions of Slovenia

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	81.7	87	87	93	79	73
February	89.3	98	98	95	87	99
March	95.7	95	94	98	100	96
April	97.6		98	97	96	99
May	97.5		97	100	95	99
June	98.1		98	97	100	98
July	97.8		96	100	98	98
August	96.6		94	98	98	96
September	91.7		94	90	96	96
October	84.9		94	72	82	89
November	73.1		83	70	73	58
December	78.4		80	54	77	65
Average	91.8	93.4	93.5	91.3	91.4	90.8

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	5.4	7	8	7	5	6
February	9.9	14	9	11	11	13
March	13.7	15	14	13	13	14
April	17.5		15	16	15	20
May	21.2		20	24	20	21
June	27.5		26	29	29	25
July	28.7		29	30	29	27
August	28.3		28	29	27	28
September	22.9		25	22	25	24
October	18.4		21	19	15	17
November	10.3		12	11	9	9
December	6.4		8	4	6	5
Average	16.8	12.0	17.9	18.3	16.9	17.4

2nd highest temperature of Slovenia

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	-3.1	-4	0	-3	-1	-4
February	-1.3	3	-2	-1	0	0
March	1.1	4	2	-2	-1	2
April	4.5		4	4	3	3
May	9.8		11	12	8	9
June	14.9		14	16	15	14
July	16.0		17	16	17	15
August	16.1		16	17	15	17
September	11.2		13	11	10	12
October	7.5		10	9	5	8
November	3.3		2	4	3	2
December	-1.5		0	0	-1	1
Average	6.0	1.0	7.3	7.1	6.0	6.5

3rd lowest temperature of Slovenia

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	10.4	13	20	5	12	1
February	8.2	4	4	8	5	4
March	7.3	9	9	3	3	11
April	10.1		13	11	15	2
May	11.7		20	6	14	9
June	4.9		7	3	2	9
July	4.7		5	5	2	7
August	4.5		6	6	7	4
September	7.6		6	12	4	2
October	7.0		7	2	11	13
November	12.9		14	18	12	5
December	11.5		9	32	6	14
Average	8.2	8.5	9.8	7.9	7.3	6.7

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	3.8	4	4	4	4	3
February	5.1	5	6	6	5	6
March	5.2	5	6	6	5	6
April	5.2		5	6	5	5
May	4.4		4	4	5	5
June	4.5		4	5	4	5
July	4.0		4	4	4	4
August	3.8		4	5	4	4
September	3.7		4	4	4	4
October	3.9		4	3	4	4
November	3.6		4	3	4	3
December	3.8		5	3	4	4
Average	4.3	4.6	4.5	4.6	4.3	4.2

2nd highest wind speed of Slovenia

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	208°	263°	256°	221°	270°
February	258°	273°	288°	244°	244°
March	223°	254°	072°	054°	044°
April		071°	046°	230°	063°
May		086°	085°	217°	097°
June		090°	112°	165°	234°
July		221°	100°	088°	087°
August		103°	075°	103°	108°
September		127°	186°	133°	102°
October		239°	093°	115°	232°
November		256°	096°	092°	072°
December		271°	078°	255°	070°

Prevailing wind direction

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