Bissau Oswaldo Vieira Intl Weather Records (PUM00061766)

Record envelope, standing records and threshold days for Bissau Oswaldo Vieira Intl (PUM00061766), Guinea-Bissau, with 53 years of record.

Key Facts for Bissau Oswaldo Vieira Intl

Bissau Oswaldo Vieira Intl (PUM00061766) is a weather station in Guinea-Bissau at 11.89 latitude and -15.65 longitude, 39 m (129 ft) above sea level.
The station reports from 1973 to 2025, 53 years of record.
1,462 records set at Bissau Oswaldo Vieira Intl still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Guinea-Bissau, 11.89 latitude, -15.65 longitude.
Elevation: 39 m (129 ft).
Period of record: 1973 to 2025, 53 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

42 days at or beyond a record

The band shows the record high and record low for each calendar day at Bissau Oswaldo Vieira Intl. The lines show the 2026 daily maximum and minimum. 42 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Bissau Oswaldo Vieira Intl, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	44.0 C (111.2 F)	10.0 C (50.0 F)	36.5 C (97.7 F)	15.4 C (59.7 F)
Feb	39.0 C (102.2 F)	10.0 C (50.0 F)	38.2 C (100.8 F)	16.5 C (61.7 F)
Mar	40.6 C (105.1 F)	11.0 C (51.8 F)	37.6 C (99.7 F)	17.9 C (64.2 F)
Apr	41.0 C (105.8 F)	12.0 C (53.6 F)	40.4 C (104.7 F)	20.0 C (68.0 F)
May	41.0 C (105.8 F)	11.0 C (51.8 F)	37.7 C (99.9 F)	20.1 C (68.2 F)
Jun	38.5 C (101.3 F)	15.0 C (59.0 F)	36.4 C (97.5 F)	21.4 C (70.5 F)
Jul	34.5 C (94.1 F)	15.0 C (59.0 F)	33.5 C (92.3 F)	21.0 C (69.8 F)
Aug	34.8 C (94.6 F)	10.0 C (50.0 F)	32.6 C (90.7 F)	20.5 C (68.9 F)
Sep	38.4 C (101.1 F)	14.0 C (57.2 F)	n/a	n/a
Oct	35.0 C (95.0 F)	13.0 C (55.4 F)	n/a	n/a
Nov	37.0 C (98.6 F)	12.0 C (53.6 F)	n/a	n/a
Dec	38.0 C (100.4 F)	12.0 C (53.6 F)	n/a	n/a

Which Years Hold Standing Records

1,462 standing records

1,462 records at Bissau Oswaldo Vieira Intl still stand. 1975 holds the most, with 121.

Standing records at Bissau Oswaldo Vieira Intl by the year they were set
Year set	Standing records
1973	110
1974	92
1975	121
1976	89
1977	75
1978	108
1979	103
1980	67
1981	15
1982	1
1983	1
1984	14
1985	18
1986	8
1987	3
1988	19
1989	10
1990	3
1993	1
1994	11
1995	29
1996	19
1997	11
1998	5
2006	1
2007	28
2008	6
2009	37
2010	18
2011	18
2012	9
2013	39
2014	18
2015	22
2016	32
2017	30
2018	26
2020	16
2022	32
2023	48
2024	90
2025	59

Wettest Day of Each Month

Jul: 170.9 mm (6.7 in)

The wettest day on record for each calendar month at Bissau Oswaldo Vieira Intl. The most was 170.9 mm (6.7 in) on 10 July 2007.

Record daily precipitation for each month at Bissau Oswaldo Vieira Intl
Month	Record daily precipitation (mm)	Date
Jan	0.0 mm (0.00 in)	3 January 1974
Feb	7.9 mm (0.31 in)	11 February 1979
Mar	0.0 mm (0.00 in)	9 March 1974
Apr	8.9 mm (0.35 in)	4 April 1979
May	17.0 mm (0.7 in)	24 May 1978
Jun	62.0 mm (2.4 in)	20 June 2023
Jul	170.9 mm (6.7 in)	10 July 2007
Aug	140.0 mm (5.5 in)	6 August 1974
Sep	134.9 mm (5.3 in)	10 September 2022
Oct	98.0 mm (3.9 in)	3 October 1984
Nov	35.1 mm (1.4 in)	14 November 1973
Dec	2.0 mm (0.08 in)	30 December 2022

Period of Record Coverage

1973 to 2025

43 years of record at Bissau Oswaldo Vieira Intl, 1973 to 2025. 43 years have data for under 90 percent of days and are left out of rankings: 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980 and others.

Days with data per year at Bissau Oswaldo Vieira Intl
Year	Days with data	Share of year	Complete
1973	157	43%	No
1974	154	42%	No
1975	206	56%	No
1976	162	44%	No
1977	166	45%	No
1978	221	61%	No
1979	226	62%	No
1980	170	46%	No
1981	36	10%	No
1982	9	2%	No
1983	2	1%	No
1984	53	14%	No
1985	38	10%	No
1986	31	8%	No
1987	9	2%	No
1988	82	22%	No
1989	36	10%	No
1990	17	5%	No
1993	13	4%	No
1994	111	30%	No
1995	145	40%	No
1996	141	39%	No
1997	102	28%	No
1998	20	5%	No
2006	26	7%	No
2007	208	57%	No
2008	60	16%	No
2009	206	56%	No
2010	224	61%	No
2011	243	67%	No
2012	93	25%	No
2013	217	59%	No
2014	209	57%	No
2015	216	59%	No
2016	242	66%	No
2017	236	65%	No
2018	186	51%	No
2019	1	0%	No
2020	90	25%	No
2021	5	1%	No
2022	65	18%	No
2024	7	2%	No
2025	113	31%	No

Latest Records

No records were set at this station in the latest data.

Extremes by Year

1973 to 2025

Yearly extremes at Bissau Oswaldo Vieira Intl: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	44.0 C (111.2 F)	1995	39.3 C (102.7 F)	43
Coldest night (TNn)	10.0 C (50.0 F)	1975	17.1 C (62.8 F)	28
Wettest day (Rx1day)	170.9 mm (6.7 in)	2007	50.0 mm (2.0 in)	25
Wettest five days (Rx5day)	159.6 mm (6.3 in)	2023	102.1 mm (4.0 in)	11
Longest dry spell (CDD)	23 days	2025	3 days	21

Hottest day (TXx)

The hottest day of the year at Bissau Oswaldo Vieira Intl, 1973 to 2025. The record is 44.0 C (111.2 F) in 1995, marked on the chart; the median year is 39.3 C (102.7 F).

Hottest day (TXx) at Bissau Oswaldo Vieira Intl by year
Year	Hottest day (TXx)
1973	41.0 C (105.8 F)
1974	39.0 C (102.2 F)
1975	40.0 C (104.0 F)
1976	39.0 C (102.2 F)
1977	41.0 C (105.8 F)
1978	40.0 C (104.0 F)
1979	41.0 C (105.8 F)
1980	40.0 C (104.0 F)
1981	40.0 C (104.0 F)
1982	38.4 C (101.1 F)
1983	32.0 C (89.6 F)
1984	39.0 C (102.2 F)
1985	38.5 C (101.3 F)
1986	39.2 C (102.6 F)
1987	38.2 C (100.8 F)
1988	40.6 C (105.1 F)
1989	40.2 C (104.4 F)
1990	38.6 C (101.5 F)
1993	35.6 C (96.1 F)
1994	39.0 C (102.2 F)
1995	44.0 C (111.2 F)
1996	37.6 C (99.7 F)
1997	39.6 C (103.3 F)
1998	39.6 C (103.3 F)
2006	34.5 C (94.1 F)
2007	39.5 C (103.1 F)
2008	35.0 C (95.0 F)
2009	39.6 C (103.3 F)
2010	40.5 C (104.9 F)
2011	39.3 C (102.7 F)
2012	38.5 C (101.3 F)
2013	39.4 C (102.9 F)
2014	38.0 C (100.4 F)
2015	37.6 C (99.7 F)
2016	40.0 C (104.0 F)
2017	39.5 C (103.1 F)
2018	40.0 C (104.0 F)
2019	33.2 C (91.8 F)
2020	38.4 C (101.1 F)
2021	36.6 C (97.9 F)
2022	40.2 C (104.4 F)
2023	n/a
2024	36.7 C (98.1 F)
2025	40.4 C (104.7 F)

Coldest night (TNn)

The coldest night of the year at Bissau Oswaldo Vieira Intl, 1973 to 2025. The record is 10.0 C (50.0 F) in 1975, marked on the chart; the median year is 17.1 C (62.8 F).

Coldest night (TNn) at Bissau Oswaldo Vieira Intl by year
Year	Coldest night (TNn)
1973	12.0 C (53.6 F)
1974	16.0 C (60.8 F)
1975	10.0 C (50.0 F)
1976	10.0 C (50.0 F)
1977	12.0 C (53.6 F)
1978	11.0 C (51.8 F)
1979	10.0 C (50.0 F)
1980	17.0 C (62.6 F)
1981	16.0 C (60.8 F)
1982	23.0 C (73.4 F)
1983	19.8 C (67.6 F)
1984	18.0 C (64.4 F)
1985	18.6 C (65.5 F)
1986	n/a
1987	n/a
1988	16.8 C (62.2 F)
1989	n/a
1990	n/a
1993	21.5 C (70.7 F)
1994	19.0 C (66.2 F)
1995	20.0 C (68.0 F)
1996	20.0 C (68.0 F)
1997	18.0 C (64.4 F)
1998	n/a
2006	n/a
2007	n/a
2008	n/a
2009	23.0 C (73.4 F)
2010	18.5 C (65.3 F)
2011	24.2 C (75.6 F)
2012	17.2 C (63.0 F)
2013	18.1 C (64.6 F)
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	17.0 C (62.6 F)
2023	16.0 C (60.8 F)
2024	16.3 C (61.3 F)
2025	15.4 C (59.7 F)

Wettest day (Rx1day)

The wettest day of the year at Bissau Oswaldo Vieira Intl, 1973 to 2025. The record is 170.9 mm (6.7 in) in 2007, marked on the chart; the median year is 50.0 mm (2.0 in).

Wettest day (Rx1day) at Bissau Oswaldo Vieira Intl by year
Year	Wettest day (Rx1day)
1973	55.1 mm (2.2 in)
1974	140.0 mm (5.5 in)
1975	0.0 mm (0.00 in)
1976	33.0 mm (1.3 in)
1977	50.0 mm (2.0 in)
1978	59.9 mm (2.4 in)
1979	70.1 mm (2.8 in)
1980	52.1 mm (2.1 in)
1981	22.1 mm (0.9 in)
1982	7.1 mm (0.28 in)
1983	n/a
1984	98.0 mm (3.9 in)
1985	5.1 mm (0.20 in)
1986	3.0 mm (0.12 in)
1987	n/a
1988	3.0 mm (0.12 in)
1989	n/a
1990	n/a
1993	n/a
1994	43.9 mm (1.7 in)
1995	n/a
1996	n/a
1997	n/a
1998	n/a
2006	n/a
2007	170.9 mm (6.7 in)
2008	38.1 mm (1.5 in)
2009	128.0 mm (5.0 in)
2010	0.0 mm (0.00 in)
2011	9.9 mm (0.39 in)
2012	8.9 mm (0.35 in)
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	134.9 mm (5.3 in)
2023	104.9 mm (4.1 in)
2024	108.0 mm (4.3 in)
2025	55.1 mm (2.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Bissau Oswaldo Vieira Intl, 1973 to 2025. The record is 159.6 mm (6.3 in) in 2023, marked on the chart; the median year is 102.1 mm (4.0 in).

Wettest five days (Rx5day) at Bissau Oswaldo Vieira Intl by year
Year	Wettest five days (Rx5day)
1973	102.1 mm (4.0 in)
1974	37.1 mm (1.5 in)
1975	n/a
1976	54.1 mm (2.1 in)
1977	8.9 mm (0.35 in)
1978	75.2 mm (3.0 in)
1979	123.0 mm (4.8 in)
1980	80.0 mm (3.1 in)
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a
2011	n/a
2012	n/a
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	156.0 mm (6.1 in)
2023	159.6 mm (6.3 in)
2024	155.0 mm (6.1 in)
2025	144.8 mm (5.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Bissau Oswaldo Vieira Intl, 1973 to 2025. The record is 23 days in 2025, marked on the chart; the median year is 3 days.

Longest dry spell (CDD) at Bissau Oswaldo Vieira Intl by year
Year	Longest dry spell (CDD)
1973	10 days
1974	6 days
1975	1 day
1976	5 days
1977	8 days
1978	7 days
1979	14 days
1980	9 days
1981	2 days
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	1 day
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1993	n/a
1994	1 day
1995	n/a
1996	n/a
1997	n/a
1998	n/a
2006	n/a
2007	1 day
2008	1 day
2009	1 day
2010	1 day
2011	1 day
2012	1 day
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	3 days
2023	3 days
2024	18 days
2025	23 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Download the Data

Data for Bissau Oswaldo Vieira Intl standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Bissau Oswaldo Vieira Intl threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).