Climate Aleppo Air Defense Base Helipad 2021-2024

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

Calculated from historical METAR data of Aleppo International Airport (OSAP) between 2021 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021
January	30.8	18	10	51	52
February	59.2	26	63	62	86
March	63.2	64	61	53	76
April	79.4		78	79	82
May	91.3		88	89	100
June	96.5		99	93	99
July	98.9		99	98	100
August	98.9		98	100	99
September	98.0		97	98	100
October	94.1		90	98	97
November	64.2		71	54	72
December	30.0		24	7	63
Average	73.9	37.3	73.1	74.8	84.4

4th best VFR conditions of Syria

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
January	61.7	53	37	77	88
February	79.2	64	81	79	94
March	92.1	94	96	82	95
April	98.2		99	97	100
May	97.9		98	97	100
June	98.4		99	97	99
July	98.9		99	98	100
August	99.7		99	100	100
September	99.4		99	99	100
October	98.7		98	99	100
November	85.9		90	82	87
December	48.4		46	23	79
Average	88.0	71.1	87.4	86.9	94.7

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
January	11.5	13	12	11	10
February	14.1	15	12	14	15
March	16.5	18	20	13	16
April	24.0		23	26	24
May	28.9		29	29	29
June	33.0		33	34	32
July	37.1		38	36	37
August	36.9		38	37	36
September	33.5		34	34	32
October	27.7		29	28	27
November	20.1		21	20	21
December	13.6		15	13	12
Average	19.7	15.0	25.4	24.8	24.7

3rd highest temperature of Syria

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°C)

Month	Average	2024	2023	2022	2021
January	3.6	5	3	3	3
February	4.5	6	2	6	5
March	6.7	7	8	5	7
April	11.2		10	12	12
May	17.3		16	16	20
June	20.8		21	19	22
July	24.5		25	23	26
August	25.1		26	23	27
September	21.2		20	22	22
October	16.6		16	17	17
November	10.9		12	10	11
December	5.7		6	7	5
Average	11.4	6.0	13.7	13.7	15.1

2nd lowest temperature of Syria

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month	Average	2024	2023	2022	2021
January	9.6	14	6	9	9
February	3.5	2	8	1	1
March	4.2	8	3	4	1
April	0.2		0	0	1
May	0.5		1	0	0
June	0.0		0	0	0
July	0.0		0	0	0
August	0.0		0	0	0
September	0.2		1	0	0
October	0.0		0	0	0
November	2.0		2	3	1
December	1.9		1	0	5
Average	2.5	7.8	2.1	1.3	1.5

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
January	5.5	6	5	6	6
February	5.1	5	5	6	4
March	7.7	9	8	6	8
April	7.9		9	8	7
May	8.9		9	9	10
June	10.4		10	11	10
July	9.9		10	11	9
August	10.3		10	11	8
September	8.2		8	8	8
October	5.8		6	6	5
November	5.0		6	5	4
December	4.7		5	4	5
Average	6.5	6.4	7.7	7.6	7.0

3rd highest wind speed of Syria

Average wind speed

Excluding wind gusts. Only observations between sunrise and sunset are taken into account.

Prevailing wind direction

Month	2024	2023	2022	2021
January	089°	092°	089°	181°
February	100°	073°	259°	156°
March	248°	258°	239°	245°
April		240°	250°	241°
May		262°	274°	264°
June		270°	270°	257°
July		276°	268°	267°
August		269°	266°	259°
September		266°	274°	261°
October		213°	256°	264°
November		133°	095°	090°
December		159°	087°	086°

Prevailing wind direction

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