Climate Stockholm-Bromma Airport 2020-2024

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

Calculated from historical METAR data of Stockholm-Bromma Airport (ESSB) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	45.5	43	40	48	32	56
February	55.5	45	48	60	61	66
March	65.8	55	54	92	73	71
April	86.5		83	84	91	93
May	87.7		94	87	72	89
June	91.4		96	89	92	93
July	90.9		86	89	92	91
August	83.4		61	90	76	93
September	74.8		77	78	77	69
October	61.0		65	66	56	54
November	39.8		26	39	60	37
December	36.9		15	44	58	24
Average	71.7	48.2	69.7	78.5	74.7	76.4

17th best VFR conditions of Sweden

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	70.3	76	57	74	53	87
February	77.6	58	82	82	83	89
March	83.0	77	75	98	93	84
April	93.7		90	92	96	96
May	94.3		97	96	82	96
June	96.5		99	95	97	98
July	97.6		96	96	99	97
August	93.6		86	96	87	98
September	89.5		88	96	90	83
October	84.5		90	85	81	80
November	70.1		60	80	86	75
December	62.5		52	77	72	61
Average	86.1	70.5	85.4	91.6	87.6	89.8

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	1.5	-1	3	2	0	6
February	2.2	2	2	3	0	5
March	5.3	6	3	8	7	7
April	10.1		10	10	9	11
May	15.9		17	15	15	14
June	21.8		23	22	23	23
July	22.4		21	22	25	21
August	21.5		20	24	19	24
September	16.5		19	15	15	18
October	10.7		9	12	12	12
November	5.8		4	6	6	9
December	1.9		0	-2	0	5
Average	10.3	2.3	10.7	11.8	10.9	12.6

18th highest temperature of Sweden

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	-3.0	-6	-2	-2	-4	2
February	-4.7	-2	-3	-2	-6	-1
March	-3.8	-1	-4	-3	-1	-1
April	0.2		0	-1	0	1
May	5.2		5	5	5	4
June	11.5		11	12	13	12
July	12.9		13	13	15	12
August	12.5		13	14	11	13
September	8.7		11	6	8	9
October	4.8		3	6	6	6
November	1.5		-1	3	0	4
December	-2.0		-4	-6	-5	2
Average	3.1	-3.0	3.3	4.1	3.4	5.2

35th lowest temperature of Sweden

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	15.6	24	19	9	31	5
February	15.0	14	15	13	17	9
March	12.7	7	24	1	11	11
April	6.3		5	9	8	4
May	6.9		5	9	14	6
June	4.5		4	6	3	4
July	4.9		8	6	4	6
August	7.8		13	4	15	2
September	5.2		5	5	4	7
October	9.5		12	4	6	11
November	12.5		22	12	9	11
December	18.7		35	15	13	18
Average	9.2	13.4	11.5	6.9	9.8	6.9

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	7.5	8	8	9	6	9
February	7.8	7	8	9	7	10
March	8.2	7	9	7	9	9
April	8.3		7	8	9	10
May	7.3		7	8	7	7
June	7.3		6	7	6	7
July	7.1		8	7	7	8
August	6.9		7	7	7	6
September	7.6		7	7	8	7
October	8.0		9	7	8	8
November	6.9		7	6	7	8
December	6.6		6	5	6	8
Average	7.4	7.3	7.4	7.3	7.3	7.9

18th highest wind speed of Sweden

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	251°	209°	281°	310°	233°
February	186°	280°	248°	276°	231°
March	109°	279°	263°	272°	248°
April		039°	302°	298°	290°
May		212°	259°	110°	279°
June		115°	210°	211°	094°
July		215°	254°	135°	233°
August		162°	220°	284°	216°
September		215°	334°	277°	243°
October		302°	230°	213°	195°
November		347°	119°	250°	217°
December		313°	323°	279°	146°

Prevailing wind direction

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