Climate Bern-Belp Airport 2020-2024

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

Calculated from historical METAR data of Bern-Belp Airport (LSZB) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	64.6	62	59	74	62	78
February	78.9	86	85	93	75	92
March	85.5	81	80	89	88	87
April	89.2		75	90	94	97
May	88.3		83	94	90	82
June	95.0		99	96	93	90
July	96.3		97	99	92	96
August	94.1		96	92	93	96
September	92.9		98	89	90	92
October	85.2		93	81	86	88
November	65.6		81	81	52	60
December	58.3		66	34	44	65
Average	84.3	76.8	85.8	88.0	82.7	86.9

7th best VFR conditions of Switzerland

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	85.9	91	94	84	92	84
February	93.7	99	99	97	97	98
March	96.4	95	94	100	97	100
April	97.4		95	94	99	100
May	98.5		99	98	99	97
June	99.1		100	100	99	97
July	99.4		99	100	99	100
August	99.4		100	100	100	100
September	98.5		100	97	97	98
October	95.0		97	99	93	96
November	86.0		93	91	81	79
December	76.2		77	73	65	79
Average	95.0	95.0	96.4	95.9	94.5	95.1

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	4.7	6	5	5	4	7
February	8.8	11	9	9	9	11
March	12.0	13	12	14	11	11
April	15.8		13	15	14	19
May	19.1		19	22	16	20
June	25.2		27	27	25	22
July	26.5		27	28	24	26
August	26.0		27	27	23	26
September	21.7		25	20	22	22
October	16.9		19	19	15	14
November	8.9		10	11	7	10
December	5.0		7	2	4	5
Average	15.2	9.9	16.6	16.9	14.4	16.1

5th highest temperature of Switzerland

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	-3.2	-1	-2	-4	-3	-3
February	-2.5	1	-2	-2	-1	0
March	0.1	2	1	-2	-1	0
April	2.3		3	3	1	3
May	7.2		8	9	5	6
June	11.7		11	12	13	11
July	13.2		14	13	13	13
August	13.0		14	13	12	13
September	9.5		12	10	9	10
October	5.6		6	9	3	6
November	1.5		2	3	1	2
December	-1.1		0	-3	-1	-1
Average	4.4	0.5	5.5	5.3	4.3	4.8

4th lowest temperature of Switzerland

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	14.9	18	19	5	21	5
February	12.2	7	3	10	11	20
March	11.7	13	15	5	9	8
April	9.4		14	16	5	6
May	10.5		10	5	20	7
June	6.6		2	4	8	17
July	6.0		7	2	14	3
August	7.6		12	3	8	10
September	7.1		3	15	10	5
October	7.7		8	10	4	14
November	14.2		29	10	9	4
December	18.5		24	16	21	15
Average	10.2	12.5	11.0	7.6	11.3	9.3

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	4.1	4	4	4	4	3
February	4.3	3	4	5	4	6
March	4.9	5	5	4	5	5
April	4.7		5	5	5	4
May	4.6		4	5	6	5
June	4.3		4	4	4	5
July	4.6		5	4	4	5
August	4.3		4	4	4	4
September	3.9		4	4	4	4
October	3.6		4	3	4	4
November	3.5		5	3	4	3
December	4.0		4	3	4	3
Average	4.3	4.1	4.4	4.2	4.3	4.3

5th highest wind speed of Switzerland

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	273°	127°	197°	243°	250°
February	290°	320°	259°	312°	257°
March	267°	260°	320°	291°	324°
April		293°	314°	346°	315°
May		014°	306°	271°	346°
June		349°	298°	323°	280°
July		277°	321°	323°	292°
August		278°	334°	297°	219°
September		293°	284°	291°	295°
October		270°	263°	287°	277°
November		242°	236°	294°	297°
December		219°	209°	131°	157°

Prevailing wind direction

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