Climate Ilopango International Airport 2020-2024

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

Calculated from historical METAR data of Ilopango International Airport (MSSS) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	97.0	96	98	98	99	90
February	97.3	100	100	99	97	96
March	95.3	92	89	96	99	99
April	80.0		60	91	91	85
May	74.1		53	75	89	77
June	80.6		79	74	86	78
July	95.0		97	94	92	96
August	90.0		90	91	91	87
September	83.3		97	70	85	86
October	81.0		80	85	88	84
November	93.9		97	90	99	78
December	98.0		98	94	98	98
Average	89.4	95.7	85.6	87.7	92.5	88.2

5th best VFR conditions of El Salvador

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	98.4	100	99	98	99	95
February	99.0	100	100	100	100	99
March	98.4	99	99	98	99	99
April	91.4		75	97	95	98
May	89.5		79	93	96	91
June	91.9		91	90	96	90
July	97.5		99	97	96	98
August	95.8		98	95	95	97
September	93.2		99	89	97	94
October	91.2		95	92	96	95
November	96.8		97	96	99	89
December	99.2		100	99	99	99
Average	95.6	99.5	93.6	95.2	97.1	95.3

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	29.7	31	29	29	30	30
February	30.7	30	31	30	30	31
March	31.5	32	30	31	31	32
April	31.2		31	31	31	32
May	30.1		32	29	30	31
June	29.1		30	28	29	29
July	30.3		31	29	30	30
August	29.8		30	29	29	30
September	29.2		30	28	29	29
October	28.5		29	29	29	29
November	28.9		29	29	29	28
December	29.0		29	28	30	28
Average	30.0	30.9	30.1	29.1	29.8	29.7

5th highest temperature of El Salvador

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	18.6	21	19	19	19	19
February	19.1	21	20	18	20	19
March	19.5	23	20	18	21	22
April	21.1		22	21	22	24
May	20.6		24	22	21	20
June	20.5		23	20	22	20
July	20.5		23	21	20	21
August	20.2		23	21	21	21
September	20.0		23	21	20	19
October	20.4		23	22	22	20
November	19.5		22	21	20	18
December	18.3		21	20	20	15
Average	20.0	21.2	21.8	20.2	20.6	19.8

1st lowest temperature of El Salvador

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	0.0	0	0	0	0	0
February	0.0	0	0	0	0	0
March	0.1	0	0	1	1	0
April	0.3		0	0	0	0
May	2.2		0	5	1	5
June	4.8		3	9	4	15
July	1.0		1	3	1	1
August	2.4		2	3	1	4
September	2.4		0	4	2	2
October	6.2		6	3	2	2
November	1.9		3	1	0	11
December	0.2		0	0	0	1
Average	1.6		1.1	2.5	1.0	3.0

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	7.2	7	6	6	6	8
February	6.9	7	6	7	7	8
March	7.2	7	7	7	7	8
April	6.4		6	6	7	7
May	5.3		6	5	6	6
June	4.8		5	5	5	5
July	5.3		5	5	5	5
August	5.0		5	5	5	6
September	5.0		5	5	5	6
October	5.3		6	6	6	5
November	6.4		6	5	7	6
December	7.2		8	6	6	7
Average	6.1	6.9	5.8	5.7	6.0	6.3

5th highest wind speed of El Salvador

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	356°	353°	337°	356°	353°
February	350°	014°	355°	332°	010°
March	152°	157°	219°	154°	096°
April		171°	178°	184°	168°
May		170°	162°	190°	155°
June		157°	153°	173°	128°
July		025°	344°	054°	041°
August		048°	125°	156°	112°
September		301°	144°	164°	152°
October		027°	354°	140°	329°
November		344°	350°	008°	341°
December		342°	352°	352°	348°

Prevailing wind direction

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