Climate Ten. Cel. Aviador César Bombonato Airport 2020-2024

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

Calculated from historical METAR data of Ten. Cel. Aviador César Bombonato Airport (SBUL) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	79.4	78	62	66	89	78
February	79.7	79	93	74	72	72
March	89.8	81	95	94	91	82
April	94.1		89	99	98	94
May	96.7		99	93	100	92
June	97.6		95	97	96	98
July	99.2		99	100	100	100
August	96.8		94	96	98	99
September	93.2		98	93	87	90
October	92.0		97	96	89	66
November	83.9		93	90	77	93
December	80.5		89	66	72	84
Average	88.8	79.2	91.4	89.0	88.9	86.5

26th best VFR conditions of Brazil

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	88.7	91	78	82	93	87
February	90.7	92	99	85	92	83
March	96.2	94	100	98	95	94
April	97.8		98	100	100	97
May	98.1		99	97	100	94
June	98.4		95	99	98	100
July	99.3		99	100	100	100
August	98.8		98	97	100	99
September	98.1		100	97	98	97
October	96.3		98	99	94	88
November	92.8		97	97	90	99
December	90.5		98	84	87	92
Average	94.9	92.1	96.4	94.6	95.3	93.7

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	2020
January	27.9	29	26	27	29	28
February	27.8	28	29	27	28	27
March	28.3	29	28	29	28	28
April	27.3		27	29	27	27
May	25.7		27	25	27	24
June	25.4		25	25	26	26
July	25.5		27	26	25	26
August	27.7		29	27	28	27
September	30.6		32	29	33	31
October	29.8		31	29	29	30
November	28.2		31	28	28	29
December	28.1		30	27	27	28
Average	27.8	28.5	28.4	27.3	27.7	27.5

76th highest temperature of Brazil

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	19.4	20	19	19	20	19
February	19.4	20	20	19	19	20
March	19.7	21	20	20	19	19
April	18.4		18	19	17	18
May	16.0		16	15	17	15
June	15.2		14	15	15	16
July	14.2		15	15	13	15
August	16.4		18	16	17	16
September	19.1		20	18	21	19
October	19.8		21	19	19	20
November	19.0		21	17	19	19
December	19.5		21	19	19	19
Average	18.2	20.1	18.4	17.5	17.9	17.8

35th lowest temperature of Brazil

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	7.8	9	15	12	4	6
February	8.1	6	4	12	9	16
March	4.2	10	3	2	4	4
April	2.5		4	1	0	2
May	1.2		1	1	0	4
June	0.6		1	2	1	0
July	0.0		0	0	0	0
August	0.7		1	1	1	1
September	2.0		2	3	0	2
October	3.0		2	5	3	3
November	6.4		3	3	7	3
December	6.8		4	11	11	6
Average	4.2	8.2	3.4	4.3	3.3	4.0

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	7.3	7	8	7	7	7
February	7.2	7	7	7	7	8
March	7.3	7	8	8	7	8
April	7.4		8	8	7	7
May	7.5		7	8	7	7
June	8.0		7	8	8	9
July	8.8		8	9	8	9
August	9.0		9	9	9	9
September	9.2		9	9	9	8
October	8.6		9	9	9	9
November	8.0		8	8	8	8
December	7.5		8	8	8	7
Average	7.9	6.9	7.9	8.1	7.8	7.9

76th highest wind speed of Brazil

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	344°	356°	001°	038°	354°
February	014°	022°	014°	020°	360°
March	012°	040°	037°	016°	042°
April		032°	046°	062°	051°
May		058°	041°	044°	055°
June		052°	063°	060°	045°
July		048°	049°	065°	046°
August		031°	058°	053°	058°
September		033°	040°	036°	054°
October		013°	036°	029°	030°
November		015°	028°	013°	038°
December		011°	005°	018°	023°

Prevailing wind direction

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