Climate St Gallen Altenrhein Airport 2020-2024

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

Calculated from historical METAR data of St Gallen Altenrhein Airport (LSZR) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	59.6	55	71	54	63	57
February	75.2	79	71	91	76	96
March	86.0	74	81	94	92	91
April	89.1		84	87	94	99
May	88.6		80	93	94	84
June	94.2		100	95	92	88
July	95.4		98	99	90	95
August	91.3		92	87	89	95
September	89.3		94	90	87	84
October	74.5		81	68	67	85
November	61.3		78	75	50	39
December	58.0		66	23	64	46
Average	81.5	69.8	84.7	84.3	82.5	82.9

10th 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	79.6	69	98	79	86	66
February	88.6	90	85	98	87	98
March	95.9	91	97	99	98	99
April	96.9		98	96	96	100
May	97.9		98	99	98	97
June	98.5		100	99	97	97
July	99.0		100	100	98	99
August	97.8		98	97	98	99
September	97.6		99	98	96	97
October	85.9		90	84	80	94
November	82.4		97	87	71	62
December	76.8		78	59	84	69
Average	92.1	84.0	95.6	93.8	92.3	91.9

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	4.5	5	6	5	4	5
February	7.7	10	7	9	8	11
March	11.4	13	12	12	10	11
April	14.9		13	14	13	18
May	18.6		19	21	16	19
June	24.2		26	25	25	21
July	25.1		26	26	23	25
August	24.4		25	25	22	24
September	20.2		23	19	21	21
October	15.5		18	17	14	13
November	8.9		10	11	7	9
December	5.7		7	2	6	5
Average	14.4	9.4	15.8	15.9	14.0	15.0

13th 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	-2.7	-1	0	-1	-1	-1
February	0.2	3	0	1	0	2
March	2.0	4	3	0	1	1
April	4.4		5	4	2	5
May	9.0		10	11	7	8
June	13.7		14	14	15	12
July	15.3		16	15	15	15
August	14.9		16	15	14	15
September	11.4		14	11	12	12
October	7.5		9	10	5	7
November	3.2		4	4	3	3
December	0.5		1	-2	1	1
Average	6.2	2.2	7.5	7.1	6.1	6.6

11th 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	19	12	11	22	3
February	11.5	9	6	10	16	16
March	11.2	18	13	1	9	10
April	11.6		15	18	7	5
May	12.4		13	8	20	11
June	7.3		2	9	6	18
July	7.7		7	6	13	8
August	11.5		14	7	19	14
September	8.9		4	13	3	10
October	10.4		9	9	8	15
November	13.6		29	9	20	4
December	17.8		21	18	20	17
Average	11.5	15.4	11.2	9.2	13.0	10.9

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	4.5	4	5	4	5	4
February	4.8	3	5	6	4	7
March	5.3	7	5	5	5	6
April	5.1		5	5	5	4
May	4.8		5	4	6	5
June	4.5		5	4	5	5
July	4.3		5	4	4	4
August	4.1		5	4	4	4
September	3.9		4	4	4	4
October	4.1		4	4	5	4
November	4.2		6	4	4	4
December	4.5		5	3	4	4
Average	4.5	4.8	4.7	4.3	4.4	4.4

13th 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	284°	288°	263°	241°	264°
February	277°	308°	266°	297°	265°
March	236°	272°	291°	282°	305°
April		299°	292°	295°	295°
May		311°	298°	272°	310°
June		301°	297°	288°	294°
July		304°	294°	293°	307°
August		289°	303°	319°	295°
September		286°	281°	288°	295°
October		279°	287°	264°	299°
November		259°	269°	300°	314°
December		260°	332°	160°	284°

Prevailing wind direction

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