Sao Tome Weather Records (BR002241001)

Record envelope, standing records and threshold days for Sao Tome (BR002241001), Brazil, with 44 years of record.

Key Facts for Sao Tome

Sao Tome (BR002241001) is a weather station in Brazil at -22.05 latitude and -41.05 longitude, 4 m (13 ft) above sea level.
The station reports from 1966 to 2009, 44 years of record.
138 records set at Sao Tome still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Sao Tome set a daily record precipitation of 41.9 mm (1.6 in) on 1 April 2009.

About the Station

Location: Brazil, -22.05 latitude, -41.05 longitude.
Elevation: 4 m (13 ft).
Period of record: 1966 to 2009, 44 years.
Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Sao Tome. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Sao Tome, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	30.0 C (86.0 F)	21.5 C (70.7 F)	n/a	n/a
Feb	32.0 C (89.6 F)	14.5 C (58.1 F)	n/a	n/a
Mar	33.0 C (91.4 F)	22.0 C (71.6 F)	n/a	n/a
Apr	30.0 C (86.0 F)	20.0 C (68.0 F)	n/a	n/a
May	33.0 C (91.4 F)	17.0 C (62.6 F)	n/a	n/a
Jun	25.0 C (77.0 F)	17.0 C (62.6 F)	n/a	n/a
Jul	30.5 C (86.9 F)	14.5 C (58.1 F)	n/a	n/a
Aug	26.0 C (78.8 F)	10.8 C (51.4 F)	n/a	n/a
Sep	n/a	20.0 C (68.0 F)	n/a	n/a
Oct	n/a	22.0 C (71.6 F)	n/a	n/a
Nov	30.0 C (86.0 F)	20.5 C (68.9 F)	n/a	n/a
Dec	29.0 C (84.2 F)	23.0 C (73.4 F)	n/a	n/a

Which Years Hold Standing Records

138 standing records

138 records at Sao Tome still stand. 1985 holds the most, with 79.

Wettest Day of Each Month

Nov: 120.0 mm (4.7 in)

The wettest day on record for each calendar month at Sao Tome. The most was 120.0 mm (4.7 in) on 2 November 1991.

Record daily precipitation for each month at Sao Tome
Month	Record daily precipitation (mm)	Date
Jan	108.8 mm (4.3 in)	22 January 1979
Feb	66.0 mm (2.6 in)	3 February 1983
Mar	87.2 mm (3.4 in)	4 March 1985
Apr	69.0 mm (2.7 in)	7 April 1983
May	60.0 mm (2.4 in)	15 May 1986
Jun	60.3 mm (2.4 in)	21 June 1969
Jul	64.0 mm (2.5 in)	7 July 1986
Aug	54.0 mm (2.1 in)	19 August 1982
Sep	106.2 mm (4.2 in)	2 September 1971
Oct	60.0 mm (2.4 in)	15 October 1983
Nov	120.0 mm (4.7 in)	2 November 1991
Dec	87.0 mm (3.4 in)	11 December 1992

Period of Record Coverage

1981 to 1993

5 years of record at Sao Tome, 1981 to 1993. 5 years have data for under 90 percent of days and are left out of rankings: 1981, 1985, 1986, 1992, 1993.

Latest Records

Latest records at Sao Tome
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 April 2009	Sao Tome, BR	daily rain	41.9 mm (1.6 in)	28.7 mm (1.1 in)	11 years	35 of 100 (Notable)
31 March 2009	Sao Tome, BR	daily rain (Tie)	16.0 mm (0.6 in)	tie	24 years	2 of 100 (Routine)
30 March 2009	Sao Tome, BR	daily rain	16.0 mm (0.6 in)	2.0 mm (0.08 in)	18 years	10 of 100 (Routine)
10 September 1999	Sao Tome, BR	daily rain	12.0 mm (0.5 in)	4.0 mm (0.16 in)	16 years	10 of 100 (Routine)
9 June 1999	Sao Tome, BR	daily rain	13.0 mm (0.5 in)	3.0 mm (0.12 in)	12 years	9 of 100 (Routine)
2 June 1999	Sao Tome, BR	daily rain	3.6 mm (0.14 in)	1.4 mm (0.06 in)	13 years	8 of 100 (Routine)
18 March 1999	Sao Tome, BR	daily rain	10.0 mm (0.4 in)	1.6 mm (0.06 in)	20 years	10 of 100 (Routine)
16 March 1999	Sao Tome, BR	daily rain	11.7 mm (0.5 in)	5.1 mm (0.20 in)	16 years	10 of 100 (Routine)
2 October 1998	Sao Tome, BR	daily rain	35.4 mm (1.4 in)	4.8 mm (0.19 in)	29 years	15 of 100 (Routine)
15 September 1998	Sao Tome, BR	daily rain	17.7 mm (0.7 in)	4.7 mm (0.19 in)	0 years	7 of 100 (Routine)
6 August 1998	Sao Tome, BR	daily rain	27.0 mm (1.1 in)	3.8 mm (0.15 in)	24 years	15 of 100 (Routine)
30 May 1998	Sao Tome, BR	daily rain	12.4 mm (0.5 in)	2.4 mm (0.09 in)	19 years	10 of 100 (Routine)
1 April 1998	Sao Tome, BR	daily rain	13.2 mm (0.5 in)	0.4 mm (0.02 in)	17 years	8 of 100 (Routine)
12 February 1998	Sao Tome, BR	daily rain	58.2 mm (2.3 in)	12.2 mm (0.5 in)	10 years	15 of 100 (Routine)
19 December 1997	Sao Tome, BR	daily rain	26.4 mm (1.0 in)	19.4 mm (0.8 in)	19 years	21 of 100 (Routine)
16 December 1997	Sao Tome, BR	daily rain	25.1 mm (1.0 in)	1.1 mm (0.04 in)	7 years	5 of 100 (Routine)
6 November 1997	Sao Tome, BR	daily rain	31.9 mm (1.3 in)	21.9 mm (0.9 in)	24 years	23 of 100 (Routine)
26 October 1997	Sao Tome, BR	daily rain	18.0 mm (0.7 in)	6.0 mm (0.24 in)	14 years	13 of 100 (Routine)
17 October 1997	Sao Tome, BR	daily rain	13.2 mm (0.5 in)	8.2 mm (0.32 in)	8 years	13 of 100 (Routine)
15 September 1997	Sao Tome, BR	daily rain	13.0 mm (0.5 in)	4.2 mm (0.17 in)	18 years	11 of 100 (Routine)

Extremes by Year

1966 to 2009

Yearly extremes at Sao Tome: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	33.0 C (91.4 F)	1985	30.0 C (86.0 F)	5
Coldest night (TNn)	10.8 C (51.4 F)	1985	19.0 C (66.2 F)	7
Wettest day (Rx1day)	120.0 mm (4.7 in)	1991	60.2 mm (2.4 in)	36
Wettest five days (Rx5day)	191.0 mm (7.5 in)	1981	92.1 mm (3.6 in)	35
Longest dry spell (CDD)	61 days	1967	29 days	35

Hottest day (TXx)

The hottest day of the year at Sao Tome, 1966 to 2009. The record is 33.0 C (91.4 F) in 1985, marked on the chart; the median year is 30.0 C (86.0 F).

Hottest day (TXx) at Sao Tome by year
Year	Hottest day (TXx)
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	29.0 C (84.2 F)
1982	n/a
1983	n/a
1984	n/a
1985	33.0 C (91.4 F)
1986	33.0 C (91.4 F)
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	27.5 C (81.5 F)
1993	30.0 C (86.0 F)
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2008	n/a
2009	n/a

Coldest night (TNn)

The coldest night of the year at Sao Tome, 1966 to 2009. The record is 10.8 C (51.4 F) in 1985, marked on the chart; the median year is 19.0 C (66.2 F).

Coldest night (TNn) at Sao Tome by year
Year	Coldest night (TNn)
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	19.0 C (66.2 F)
1982	n/a
1983	n/a
1984	20.5 C (68.9 F)
1985	10.8 C (51.4 F)
1986	17.0 C (62.6 F)
1987	22.5 C (72.5 F)
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	19.0 C (66.2 F)
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2008	24.0 C (75.2 F)
2009	n/a

Wettest day (Rx1day)

The wettest day of the year at Sao Tome, 1966 to 2009. The record is 120.0 mm (4.7 in) in 1991, marked on the chart; the median year is 60.2 mm (2.4 in).

Wettest day (Rx1day) at Sao Tome by year
Year	Wettest day (Rx1day)
1966	46.0 mm (1.8 in)
1967	72.0 mm (2.8 in)
1968	50.0 mm (2.0 in)
1969	66.0 mm (2.6 in)
1970	43.0 mm (1.7 in)
1971	106.2 mm (4.2 in)
1972	36.8 mm (1.4 in)
1973	96.2 mm (3.8 in)
1974	54.6 mm (2.1 in)
1975	44.4 mm (1.7 in)
1976	51.2 mm (2.0 in)
1977	50.0 mm (2.0 in)
1978	50.6 mm (2.0 in)
1979	108.8 mm (4.3 in)
1980	69.0 mm (2.7 in)
1981	82.4 mm (3.2 in)
1982	62.2 mm (2.4 in)
1983	69.0 mm (2.7 in)
1984	96.0 mm (3.8 in)
1985	87.2 mm (3.4 in)
1986	64.0 mm (2.5 in)
1987	70.7 mm (2.8 in)
1988	50.0 mm (2.0 in)
1989	83.0 mm (3.3 in)
1990	67.0 mm (2.6 in)
1991	120.0 mm (4.7 in)
1992	87.0 mm (3.4 in)
1993	47.0 mm (1.9 in)
1994	52.7 mm (2.1 in)
1995	57.4 mm (2.3 in)
1996	76.9 mm (3.0 in)
1997	49.0 mm (1.9 in)
1998	58.2 mm (2.3 in)
1999	33.4 mm (1.3 in)
2008	13.0 mm (0.5 in)
2009	41.9 mm (1.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Sao Tome, 1966 to 2009. The record is 191.0 mm (7.5 in) in 1981, marked on the chart; the median year is 92.1 mm (3.6 in).

Wettest five days (Rx5day) at Sao Tome by year
Year	Wettest five days (Rx5day)
1966	72.0 mm (2.8 in)
1967	113.0 mm (4.4 in)
1968	114.4 mm (4.5 in)
1969	137.5 mm (5.4 in)
1970	73.4 mm (2.9 in)
1971	162.1 mm (6.4 in)
1972	67.3 mm (2.6 in)
1973	107.0 mm (4.2 in)
1974	83.8 mm (3.3 in)
1975	90.8 mm (3.6 in)
1976	70.6 mm (2.8 in)
1977	81.8 mm (3.2 in)
1978	53.4 mm (2.1 in)
1979	190.0 mm (7.5 in)
1980	71.4 mm (2.8 in)
1981	191.0 mm (7.5 in)
1982	109.9 mm (4.3 in)
1983	148.0 mm (5.8 in)
1984	175.6 mm (6.9 in)
1985	130.8 mm (5.1 in)
1986	80.6 mm (3.2 in)
1987	104.2 mm (4.1 in)
1988	81.5 mm (3.2 in)
1989	114.0 mm (4.5 in)
1990	72.9 mm (2.9 in)
1991	124.3 mm (4.9 in)
1992	88.4 mm (3.5 in)
1993	48.0 mm (1.9 in)
1994	80.0 mm (3.1 in)
1995	92.1 mm (3.6 in)
1996	174.2 mm (6.9 in)
1997	95.7 mm (3.8 in)
1998	92.9 mm (3.7 in)
1999	72.8 mm (2.9 in)
2008	n/a
2009	79.0 mm (3.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Sao Tome, 1966 to 2009. The record is 61 days in 1967, marked on the chart; the median year is 29 days.

Longest dry spell (CDD) at Sao Tome by year
Year	Longest dry spell (CDD)
1966	22 days
1967	61 days
1968	26 days
1969	35 days
1970	42 days
1971	31 days
1972	20 days
1973	30 days
1974	35 days
1975	32 days
1976	29 days
1977	21 days
1978	25 days
1979	26 days
1980	31 days
1981	40 days
1982	33 days
1983	23 days
1984	25 days
1985	37 days
1986	23 days
1987	18 days
1988	35 days
1989	26 days
1990	26 days
1991	29 days
1992	24 days
1993	32 days
1994	30 days
1995	26 days
1996	33 days
1997	37 days
1998	28 days
1999	20 days
2008	n/a
2009	1 day

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.

Rainfall Return Levels

33 years, 1967 to 1999

A day with at least 63.1 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 139.8 mm (5.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Sao Tome: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	63.1 mm (2.5 in)
5 years	83.1 mm (3.3 in)
10 years	96.6 mm (3.8 in)
25 years	113.8 mm (4.5 in)
50 years	126.8 mm (5.0 in)	Longer than the 33 years of record
100 years	139.8 mm (5.5 in)	Longer than the 33 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 33 years of values from 1967 to 1999.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 120.0 mm (4.7 in) in 1991; 108.8 mm (4.3 in) in 1979; 106.2 mm (4.2 in) in 1971.

Download the Data

Data for Sao Tome standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Sao Tome 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 2026-10-17 (17 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).