Mamou Weather Records (GV000001820)

Record envelope, standing records and threshold days for Mamou (GV000001820), Guinea, with 81 years of record.

Key Facts for Mamou

Mamou (GV000001820) is a weather station in Guinea at 10.37 latitude and -12.08 longitude, 782 m (2,566 ft) above sea level.
The station reports from 1945 to 2025, 81 years of record.
1,464 records set at Mamou still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Guinea, 10.37 latitude, -12.08 longitude.
Elevation: 782 m (2,566 ft).
Period of record: 1945 to 2025, 81 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

12 days at or beyond a record

The band shows the record high and record low for each calendar day at Mamou. The lines show the 2026 daily maximum and minimum. 12 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Mamou, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	35.5 C (95.9 F)	8.0 C (46.4 F)	33.0 C (91.4 F)	14.5 C (58.1 F)
Feb	38.0 C (100.4 F)	10.0 C (50.0 F)	33.2 C (91.8 F)	15.0 C (59.0 F)
Mar	39.5 C (103.1 F)	10.2 C (50.4 F)	37.5 C (99.5 F)	16.0 C (60.8 F)
Apr	38.2 C (100.8 F)	13.8 C (56.8 F)	36.0 C (96.8 F)	16.2 C (61.2 F)
May	35.6 C (96.1 F)	12.0 C (53.6 F)	n/a	n/a
Jun	33.7 C (92.7 F)	12.2 C (54.0 F)	29.5 C (85.1 F)	19.0 C (66.2 F)
Jul	31.6 C (88.9 F)	13.6 C (56.5 F)	26.5 C (79.7 F)	19.0 C (66.2 F)
Aug	31.0 C (87.8 F)	13.0 C (55.4 F)	27.0 C (80.6 F)	20.0 C (68.0 F)
Sep	31.1 C (88.0 F)	13.0 C (55.4 F)	n/a	n/a
Oct	31.6 C (88.9 F)	13.0 C (55.4 F)	n/a	n/a
Nov	35.0 C (95.0 F)	10.2 C (50.4 F)	n/a	n/a
Dec	34.5 C (94.1 F)	8.0 C (46.4 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Mamou still stand. 1946 holds the most, with 237.

Standing records at Mamou by the year they were set
Year set	Standing records
1945	112
1946	237
1947	200
1948	35
1949	52
1950	69
1951	36
1952	32
1953	29
1954	48
1955	49
1956	38
1957	32
1958	24
1975	1
1980	2
1981	5
1982	1
1989	1
1990	1
1991	5
1992	8
1993	6
1994	13
1995	6
1996	9
1997	1
1998	1
1999	6
2001	4
2002	3
2003	5
2004	18
2005	32
2006	22
2007	8
2009	2
2015	4
2022	26
2023	188
2024	81
2025	12

Wettest Day of Each Month

Sep: 290.1 mm (11.4 in)

The wettest day on record for each calendar month at Mamou. The most was 290.1 mm (11.4 in) on 26 September 1981.

Record daily precipitation for each month at Mamou
Month	Record daily precipitation (mm)	Date
Jan	52.1 mm (2.1 in)	5 January 1994
Feb	13.8 mm (0.5 in)	26 February 1953
Mar	79.4 mm (3.1 in)	29 March 1955
Apr	48.9 mm (1.9 in)	25 April 1958
May	180.1 mm (7.1 in)	10 May 1994
Jun	65.6 mm (2.6 in)	15 June 1957
Jul	236.0 mm (9.3 in)	7 July 1994
Aug	115.2 mm (4.5 in)	23 August 1946
Sep	290.1 mm (11.4 in)	26 September 1981
Oct	70.0 mm (2.8 in)	4 October 1956
Nov	34.0 mm (1.3 in)	4 November 1947
Dec	77.0 mm (3.0 in)	25 December 1993

Period of Record Coverage

1945 to 2025

50 years of record at Mamou, 1945 to 2025. 37 years have data for under 90 percent of days and are left out of rankings: 1958, 1975, 1976, 1977, 1978, 1979, 1980, 1981 and others.

Days with data per year at Mamou
Year	Days with data	Share of year	Complete
1945	348	95%	Yes
1946	356	98%	Yes
1947	362	99%	Yes
1948	366	100%	Yes
1949	364	100%	Yes
1950	365	100%	Yes
1951	365	100%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	270	74%	No
1975	10	3%	No
1976	6	2%	No
1977	6	2%	No
1978	4	1%	No
1979	1	0%	No
1980	13	4%	No
1981	15	4%	No
1982	6	2%	No
1983	1	0%	No
1984	2	1%	No
1989	5	1%	No
1990	8	2%	No
1991	18	5%	No
1992	69	19%	No
1993	104	28%	No
1994	139	38%	No
1995	61	17%	No
1996	106	29%	No
1997	31	8%	No
1998	13	4%	No
1999	66	18%	No
2000	10	3%	No
2001	28	8%	No
2002	25	7%	No
2003	43	12%	No
2004	86	23%	No
2005	130	36%	No
2006	152	42%	No
2007	35	10%	No
2008	1	0%	No
2009	4	1%	No
2015	15	4%	No
2022	107	29%	No
2023	219	60%	No
2024	127	35%	No
2025	41	11%	No

Latest Records

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

Climate Trend

13 complete years, 1945 to 1957

One stripe for each of 13 complete years at Mamou, 1945 to 1957. Blue stripes are years cooler than the station's own mean of 23.6 C (74.5 F); red stripes are warmer. The coolest year was 1955, at 23.3 C (73.9 F), and the warmest was 1947, at 24.1 C (75.3 F). The strongest colour marks a difference of 0.5 C (0.9 F).

Annual mean temperature at Mamou as warming stripes, 1945 to 1957
Year	Annual mean temperature	Difference from the station mean
1945	24.0 C	+0.32 C
1946	23.6 C	-0.03 C
1947	24.1 C	+0.45 C
1948	23.6 C	+0.00 C
1949	23.9 C	+0.26 C
1950	23.3 C	-0.33 C
1951	23.5 C	-0.11 C
1952	23.9 C	+0.25 C
1953	23.9 C	+0.28 C
1954	23.4 C	-0.25 C
1955	23.3 C	-0.35 C
1956	23.3 C	-0.35 C
1957	23.5 C	-0.15 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1945 to 2025

Yearly extremes at Mamou: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	39.5 C (103.1 F)	1946	35.7 C (96.3 F)	50
Coldest night (TNn)	8.0 C (46.4 F)	1945	12.9 C (55.2 F)	46
Wettest day (Rx1day)	290.1 mm (11.4 in)	1981	30.5 mm (1.2 in)	46
Wettest five days (Rx5day)	263.5 mm (10.4 in)	1946	145.8 mm (5.7 in)	20
Longest dry spell (CDD)	88 days	1950	4 days	42

Hottest day (TXx)

The hottest day of the year at Mamou, 1945 to 2025. The record is 39.5 C (103.1 F) in 1946, marked on the chart; the median year is 35.7 C (96.3 F).

Hottest day (TXx) at Mamou by year
Year	Hottest day (TXx)
1945	38.0 C (100.4 F)
1946	39.5 C (103.1 F)
1947	33.8 C (92.8 F)
1948	36.5 C (97.7 F)
1949	35.8 C (96.4 F)
1950	36.0 C (96.8 F)
1951	36.0 C (96.8 F)
1952	36.0 C (96.8 F)
1953	35.7 C (96.3 F)
1954	35.0 C (95.0 F)
1955	34.8 C (94.6 F)
1956	35.5 C (95.9 F)
1957	35.3 C (95.5 F)
1958	36.0 C (96.8 F)
1975	31.0 C (87.8 F)
1976	33.0 C (91.4 F)
1977	31.0 C (87.8 F)
1978	35.0 C (95.0 F)
1979	27.0 C (80.6 F)
1980	29.0 C (84.2 F)
1981	34.0 C (93.2 F)
1982	29.9 C (85.8 F)
1983	26.5 C (79.7 F)
1984	28.0 C (82.4 F)
1989	30.5 C (86.9 F)
1990	35.0 C (95.0 F)
1991	36.0 C (96.8 F)
1992	36.0 C (96.8 F)
1993	35.3 C (95.5 F)
1994	36.7 C (98.1 F)
1995	36.7 C (98.1 F)
1996	36.0 C (96.8 F)
1997	35.5 C (95.9 F)
1998	32.7 C (90.9 F)
1999	36.5 C (97.7 F)
2000	32.8 C (91.0 F)
2001	36.7 C (98.1 F)
2002	36.0 C (96.8 F)
2003	36.8 C (98.2 F)
2004	38.0 C (100.4 F)
2005	37.4 C (99.3 F)
2006	37.0 C (98.6 F)
2007	35.7 C (96.3 F)
2008	31.2 C (88.2 F)
2009	34.1 C (93.4 F)
2015	36.0 C (96.8 F)
2019	n/a
2020	n/a
2021	n/a
2022	34.0 C (93.2 F)
2023	37.4 C (99.3 F)
2024	38.4 C (101.1 F)
2025	37.5 C (99.5 F)

Coldest night (TNn)

The coldest night of the year at Mamou, 1945 to 2025. The record is 8.0 C (46.4 F) in 1945, marked on the chart; the median year is 12.9 C (55.2 F).

Coldest night (TNn) at Mamou by year
Year	Coldest night (TNn)
1945	8.0 C (46.4 F)
1946	12.0 C (53.6 F)
1947	11.4 C (52.5 F)
1948	10.5 C (50.9 F)
1949	10.4 C (50.7 F)
1950	10.0 C (50.0 F)
1951	11.6 C (52.9 F)
1952	11.7 C (53.1 F)
1953	12.8 C (55.0 F)
1954	11.4 C (52.5 F)
1955	10.4 C (50.7 F)
1956	11.4 C (52.5 F)
1957	10.5 C (50.9 F)
1958	12.5 C (54.5 F)
1975	12.0 C (53.6 F)
1976	15.0 C (59.0 F)
1977	16.0 C (60.8 F)
1978	n/a
1979	19.0 C (66.2 F)
1980	18.0 C (64.4 F)
1981	11.0 C (51.8 F)
1982	13.0 C (55.4 F)
1983	18.8 C (65.8 F)
1984	15.8 C (60.4 F)
1989	13.5 C (56.3 F)
1990	15.0 C (59.0 F)
1991	12.0 C (53.6 F)
1992	14.0 C (57.2 F)
1993	11.4 C (52.5 F)
1994	11.0 C (51.8 F)
1995	15.0 C (59.0 F)
1996	n/a
1997	n/a
1998	n/a
1999	16.1 C (61.0 F)
2000	19.5 C (67.1 F)
2001	14.2 C (57.6 F)
2002	11.5 C (52.7 F)
2003	18.6 C (65.5 F)
2004	14.9 C (58.8 F)
2005	13.5 C (56.3 F)
2006	17.2 C (63.0 F)
2007	n/a
2008	n/a
2009	n/a
2015	18.5 C (65.3 F)
2019	16.8 C (62.2 F)
2020	16.6 C (61.9 F)
2021	17.0 C (62.6 F)
2022	11.0 C (51.8 F)
2023	8.0 C (46.4 F)
2024	9.0 C (48.2 F)
2025	14.5 C (58.1 F)

Wettest day (Rx1day)

The wettest day of the year at Mamou, 1945 to 2025. The record is 290.1 mm (11.4 in) in 1981, marked on the chart; the median year is 30.5 mm (1.2 in).

Wettest day (Rx1day) at Mamou by year
Year	Wettest day (Rx1day)
1945	82.4 mm (3.2 in)
1946	115.2 mm (4.5 in)
1947	43.3 mm (1.7 in)
1948	128.2 mm (5.0 in)
1949	65.7 mm (2.6 in)
1950	52.6 mm (2.1 in)
1951	65.1 mm (2.6 in)
1952	57.1 mm (2.2 in)
1953	100.5 mm (4.0 in)
1954	123.9 mm (4.9 in)
1955	125.7 mm (4.9 in)
1956	70.0 mm (2.8 in)
1957	75.8 mm (3.0 in)
1958	59.9 mm (2.4 in)
1975	n/a
1976	0.0 mm (0.00 in)
1977	0.0 mm (0.00 in)
1978	n/a
1979	10.9 mm (0.4 in)
1980	19.1 mm (0.8 in)
1981	290.1 mm (11.4 in)
1982	31.0 mm (1.2 in)
1983	27.9 mm (1.1 in)
1984	25.9 mm (1.0 in)
1989	0.0 mm (0.00 in)
1990	0.0 mm (0.00 in)
1991	30.0 mm (1.2 in)
1992	10.9 mm (0.4 in)
1993	77.0 mm (3.0 in)
1994	236.0 mm (9.3 in)
1995	19.1 mm (0.8 in)
1996	0.0 mm (0.00 in)
1997	0.0 mm (0.00 in)
1998	0.0 mm (0.00 in)
1999	0.0 mm (0.00 in)
2000	5.1 mm (0.20 in)
2001	n/a
2002	11.9 mm (0.5 in)
2003	6.1 mm (0.24 in)
2004	74.2 mm (2.9 in)
2005	34.0 mm (1.3 in)
2006	0.0 mm (0.00 in)
2007	n/a
2008	n/a
2009	n/a
2015	7.1 mm (0.28 in)
2019	1.0 mm (0.04 in)
2020	5.1 mm (0.20 in)
2021	n/a
2022	52.1 mm (2.1 in)
2023	55.1 mm (2.2 in)
2024	32.0 mm (1.3 in)
2025	28.0 mm (1.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Mamou, 1945 to 2025. The record is 263.5 mm (10.4 in) in 1946, marked on the chart; the median year is 145.8 mm (5.7 in).

Wettest five days (Rx5day) at Mamou by year
Year	Wettest five days (Rx5day)
1945	168.6 mm (6.6 in)
1946	263.5 mm (10.4 in)
1947	106.2 mm (4.2 in)
1948	191.5 mm (7.5 in)
1949	129.4 mm (5.1 in)
1950	157.2 mm (6.2 in)
1951	156.4 mm (6.2 in)
1952	135.9 mm (5.4 in)
1953	161.9 mm (6.4 in)
1954	177.5 mm (7.0 in)
1955	248.6 mm (9.8 in)
1956	155.6 mm (6.1 in)
1957	167.4 mm (6.6 in)
1958	130.1 mm (5.1 in)
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	60.0 mm (2.4 in)
1982	n/a
1983	n/a
1984	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	0.0 mm (0.00 in)
1994	n/a
1995	n/a
1996	0.0 mm (0.00 in)
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2015	n/a
2019	n/a
2020	n/a
2021	n/a
2022	31.0 mm (1.2 in)
2023	96.9 mm (3.8 in)
2024	54.9 mm (2.2 in)
2025	n/a

Longest dry spell (CDD)

The longest dry spell of the year at Mamou, 1945 to 2025. The record is 88 days in 1950, marked on the chart; the median year is 4 days.

Longest dry spell (CDD) at Mamou by year
Year	Longest dry spell (CDD)
1945	60 days
1946	48 days
1947	50 days
1948	50 days
1949	36 days
1950	88 days
1951	44 days
1952	53 days
1953	36 days
1954	47 days
1955	30 days
1956	44 days
1957	59 days
1958	45 days
1975	n/a
1976	1 day
1977	1 day
1978	n/a
1979	n/a
1980	3 days
1981	4 days
1982	1 day
1983	n/a
1984	1 day
1989	2 days
1990	2 days
1991	1 day
1992	4 days
1993	5 days
1994	4 days
1995	4 days
1996	6 days
1997	4 days
1998	2 days
1999	3 days
2000	n/a
2001	n/a
2002	1 day
2003	3 days
2004	3 days
2005	4 days
2006	1 day
2007	n/a
2008	n/a
2009	n/a
2015	n/a
2019	2 days
2020	1 day
2021	n/a
2022	3 days
2023	3 days
2024	2 days
2025	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.

Download the Data

Data for Mamou standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mamou 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 2026-10-14 (14 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).