Climate Bolama 2020-2024

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

Calculated from historical METAR data of Osvaldo Vieira International Airport (GGOV) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	78.1	49	65	73	91	75
February	66.4	35	46	62	64	86
March	72.8	59	77	56	82	95
April	86.2		72	74	91	97
May	89.3		69	79	89	97
June	78.0		63	78	80	72
July	48.6		48	38	48	42
August	44.4		43	46	39	32
September	59.4		52	44	59	68
October	74.4		73	73	73	83
November	77.5		45	64	76	90
December	72.2		40	71	51	97
Average	68.4	48.2	57.6	62.9	69.7	76.8

1st best VFR conditions of Guinea-Bissau

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	96.6	95	98	95	96	96
February	89.4	89	91	96	78	94
March	93.2	99	96	93	95	99
April	98.6		100	98	100	100
May	99.1		99	99	99	99
June	96.7		95	98	96	96
July	94.5		97	95	92	94
August	90.4		98	85	93	90
September	94.5		95	94	97	97
October	96.1		100	97	95	96
November	95.2		91	92	95	96
December	92.4		82	97	94	98
Average	94.7	94.6	95.3	94.9	94.1	96.1

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	34.0	35	34	34	35	34
February	35.3	37	36	35	35	37
March	35.5	38	35	34	36	37
April	35.8		37	36	35	37
May	34.4		35	35	35	34
June	32.8		33	33	34	33
July	30.4		31	30	31	30
August	29.8		31	30	30	29
September	30.8		32	30	32	31
October	32.4		33	32	32	33
November	33.6		34	34	34	34
December	33.6		34	34	34	34
Average	33.6	36.8	33.7	33.0	33.5	33.5

1st highest temperature of Guinea-Bissau

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	18.9	19	19	20	19	19
February	19.5	20	20	19	20	20
March	21.0	21	21	21	20	22
April	22.2		23	21	22	24
May	23.1		25	23	23	24
June	24.1		25	24	25	24
July	24.3		24	24	24	25
August	24.1		25	24	24	24
September	23.8		24	24	24	23
October	24.2		24	24	24	25
November	23.0		23	22	24	23
December	19.7		20	21	20	20
Average	22.1	20.0	22.5	22.3	22.3	22.6

1st lowest temperature of Guinea-Bissau

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	0.0	0	0	0	0	0
April	0.0		0	0	0	0
May	0.2		1	1	0	0
June	1.5		1	4	1	2
July	10.1		9	16	9	13
August	14.4		8	15	14	17
September	7.7		7	8	4	13
October	0.7		0	1	2	0
November	0.2		0	0	1	0
December	0.0		0	0	0	0
Average	2.7		2.3	4.2	2.7	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	6.5	5	7	6	6	7
February	6.3	5	5	6	6	6
March	6.1	5	5	6	5	6
April	6.3		6	5	5	6
May	6.0		5	5	5	6
June	5.9		5	6	6	5
July	5.4		5	5	4	5
August	5.4		5	5	5	5
September	4.9		5	5	5	5
October	4.1		4	4	4	4
November	4.4		4	4	4	4
December	6.0		5	4	5	6
Average	5.5	5.0	5.0	5.1	5.0	5.3

1st highest wind speed of Guinea-Bissau

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	051°	052°	058°	053°	055°
February	066°	035°	049°	041°	086°
March	006°	213°	032°	346°	060°
April		234°	224°	227°	214°
May		226°	226°	240°	228°
June		227°	219°	222°	199°
July		207°	204°	237°	224°
August		208°	221°	203°	211°
September		175°	208°	190°	210°
October		178°	081°	110°	204°
November		033°	047°	015°	037°
December		054°	037°	049°	039°

Prevailing wind direction

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