Bir Mobhrein (Fort) Weather Records (MR000001401)

Record envelope, standing records and threshold days for Bir Mobhrein (Fort) (MR000001401), Mauritania, with 35 years of record.

Key Facts for Bir Mobhrein (Fort)

Bir Mobhrein (Fort) (MR000001401) is a weather station in Mauritania at 25.23 latitude and -11.62 longitude, 359 m (1,178 ft) above sea level.
The station reports from 1946 to 1980, 35 years of record.
1,464 records set at Bir Mobhrein (Fort) still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Bir Mobhrein (Fort) set a daily record low minimum temperature of 6.0 C (42.8 F) on 29 December 1980.

About the Station

Location: Mauritania, 25.23 latitude, -11.62 longitude.
Elevation: 359 m (1,178 ft).
Period of record: 1946 to 1980, 35 years.
Eligible elements: tmax, tmin, 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 Bir Mobhrein (Fort). 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 Bir Mobhrein (Fort), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	31.4 C (88.5 F)	2.4 C (36.3 F)	n/a	n/a
Feb	36.0 C (96.8 F)	4.0 C (39.2 F)	n/a	n/a
Mar	40.6 C (105.1 F)	5.1 C (41.2 F)	n/a	n/a
Apr	40.1 C (104.2 F)	6.7 C (44.1 F)	n/a	n/a
May	43.2 C (109.8 F)	9.4 C (48.9 F)	n/a	n/a
Jun	46.0 C (114.8 F)	11.8 C (53.2 F)	n/a	n/a
Jul	48.5 C (119.3 F)	12.1 C (53.8 F)	n/a	n/a
Aug	49.0 C (120.2 F)	12.9 C (55.2 F)	n/a	n/a
Sep	46.0 C (114.8 F)	13.4 C (56.1 F)	n/a	n/a
Oct	41.6 C (106.9 F)	10.6 C (51.1 F)	n/a	n/a
Nov	36.0 C (96.8 F)	7.6 C (45.7 F)	n/a	n/a
Dec	31.7 C (89.1 F)	1.0 C (33.8 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Bir Mobhrein (Fort) still stand. 1972 holds the most, with 102.

Standing records at Bir Mobhrein (Fort) by the year they were set
Year set	Standing records
1946	43
1947	66
1948	44
1949	39
1950	18
1951	49
1952	50
1953	38
1954	54
1955	46
1956	43
1957	37
1958	38
1959	45
1960	41
1961	34
1962	44
1963	41
1964	51
1965	30
1967	39
1968	30
1969	49
1970	47
1971	55
1972	102
1973	40
1974	58
1975	23
1976	25
1977	7
1978	42
1979	51
1980	45

All-Time Record Progression

1 new records

1 all-time records were set at Bir Mobhrein (Fort) between 4 February 1978 and 4 February 1978. Each dot is a new record.

Wettest Day of Each Month

Sep: 64.5 mm (2.5 in)

The wettest day on record for each calendar month at Bir Mobhrein (Fort). The most was 64.5 mm (2.5 in) on 16 September 1946.

Record daily precipitation for each month at Bir Mobhrein (Fort)
Month	Record daily precipitation (mm)	Date
Jan	19.1 mm (0.8 in)	28 January 1953
Feb	11.6 mm (0.5 in)	14 February 1951
Mar	11.5 mm (0.5 in)	2 March 1974
Apr	33.8 mm (1.3 in)	11 April 1971
May	3.0 mm (0.12 in)	3 May 1967
Jun	9.1 mm (0.36 in)	26 June 1955
Jul	3.7 mm (0.15 in)	5 July 1961
Aug	32.6 mm (1.3 in)	28 August 1959
Sep	64.5 mm (2.5 in)	16 September 1946
Oct	56.8 mm (2.2 in)	8 October 1969
Nov	56.1 mm (2.2 in)	26 November 1947
Dec	55.5 mm (2.2 in)	15 December 1969

Period of Record Coverage

1946 to 1980

34 years of record at Bir Mobhrein (Fort), 1946 to 1980. 3 years have data for under 90 percent of days and are left out of rankings: 1975, 1976, 1977.

Days with data per year at Bir Mobhrein (Fort)
Year	Days with data	Share of year	Complete
1946	364	100%	Yes
1947	365	100%	Yes
1948	362	99%	Yes
1949	329	90%	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	364	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	364	99%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	334	92%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	362	99%	Yes
1973	365	100%	Yes
1974	336	92%	Yes
1975	260	71%	No
1976	184	50%	No
1977	59	16%	No
1978	334	92%	Yes
1979	365	100%	Yes
1980	341	93%	Yes

Latest Records

Latest records at Bir Mobhrein (Fort)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 December 1980	Bir Mobhrein (Fort), MR	daily low min	6.0 C (42.8 F)	1.3 C (2.3 F)	22 years	14 of 100 (Routine)
29 December 1980	Bir Mobhrein (Fort), MR	daily low max	16.9 C (62.4 F)	0.5 C (0.9 F)	31 years	13 of 100 (Routine)
11 December 1980	Bir Mobhrein (Fort), MR	daily low max	17.6 C (63.7 F)	0.1 C (0.2 F)	31 years	12 of 100 (Routine)
16 November 1980	Bir Mobhrein (Fort), MR	daily low min	9.2 C (48.6 F)	2.2 C (4.0 F)	34 years	21 of 100 (Routine)
13 November 1980	Bir Mobhrein (Fort), MR	daily rain	0.7 mm (0.03 in)	0.7 mm (0.03 in)	34 years	13 of 100 (Routine)
7 November 1980	Bir Mobhrein (Fort), MR	daily rain	2.3 mm (0.09 in)	2.3 mm (0.09 in)	34 years	15 of 100 (Routine)
5 November 1980	Bir Mobhrein (Fort), MR	daily low min	12.0 C (53.6 F)	0.2 C (0.4 F)	8 years	5 of 100 (Routine)
24 October 1980	Bir Mobhrein (Fort), MR	daily high min	26.2 C (79.2 F)	1.2 C (2.2 F)	8 years	8 of 100 (Routine)
7 October 1980	Bir Mobhrein (Fort), MR	daily high max	39.3 C (102.7 F)	0.6 C (1.1 F)	31 years	13 of 100 (Routine)
1 October 1980	Bir Mobhrein (Fort), MR	daily low max	27.7 C (81.9 F)	1.1 C (2.0 F)	34 years	15 of 100 (Routine)
3 September 1980	Bir Mobhrein (Fort), MR	daily high min	31.7 C (89.1 F)	1.3 C (2.3 F)	16 years	10 of 100 (Routine)
1 September 1980	Bir Mobhrein (Fort), MR	monthly high min	32.8 C (91.0 F)	1.3 C (2.3 F)	28 years	24 of 100 (Routine)
1 September 1980	Bir Mobhrein (Fort), MR	daily high max (Tie)	44.8 C (112.6 F)	tie	25 years	2 of 100 (Routine)
31 August 1980	Bir Mobhrein (Fort), MR	daily high min	33.1 C (91.6 F)	2.9 C (5.2 F)	27 years	17 of 100 (Routine)
30 August 1980	Bir Mobhrein (Fort), MR	daily high max	45.4 C (113.7 F)	0.6 C (1.1 F)	29 years	12 of 100 (Routine)
23 August 1980	Bir Mobhrein (Fort), MR	daily rain	1.6 mm (0.06 in)	1.0 mm (0.04 in)	23 years	10 of 100 (Routine)
11 August 1980	Bir Mobhrein (Fort), MR	daily high min	29.1 C (84.4 F)	0.3 C (0.5 F)	18 years	8 of 100 (Routine)
11 August 1980	Bir Mobhrein (Fort), MR	daily high max (Tie)	46.0 C (114.8 F)	tie	32 years	3 of 100 (Routine)
9 August 1980	Bir Mobhrein (Fort), MR	daily high min	31.1 C (88.0 F)	0.1 C (0.2 F)	10 years	6 of 100 (Routine)
9 August 1980	Bir Mobhrein (Fort), MR	daily high max (Tie)	46.0 C (114.8 F)	tie	18 years	2 of 100 (Routine)

Climate Trend

26 complete years, 1946 to 1979

One stripe for each of 26 complete years at Bir Mobhrein (Fort), 1946 to 1979. Blue stripes are years cooler than the station's own mean of 23.7 C (74.6 F); red stripes are warmer. The coolest year was 1972, at 21.9 C (71.4 F), and the warmest was 1961, at 24.8 C (76.7 F). The strongest colour marks a difference of 1.9 C (3.4 F).

Annual mean temperature at Bir Mobhrein (Fort) as warming stripes, 1946 to 1979
Year	Annual mean temperature	Difference from the station mean
1946	22.9 C	-0.79 C
1947	23.7 C	+0.05 C
1948	24.1 C	+0.44 C
1950	23.8 C	+0.13 C
1951	23.1 C	-0.55 C
1952	23.6 C	-0.06 C
1953	23.7 C	-0.03 C
1954	23.5 C	-0.20 C
1955	24.7 C	+1.05 C
1956	23.1 C	-0.63 C
1957	23.2 C	-0.54 C
1958	24.2 C	+0.47 C
1959	23.4 C	-0.29 C
1960	23.9 C	+0.20 C
1961	24.8 C	+1.12 C
1962	24.3 C	+0.62 C
1963	23.8 C	+0.10 C
1964	24.8 C	+1.07 C
1965	23.7 C	-0.03 C
1967	23.6 C	-0.10 C
1968	23.5 C	-0.16 C
1970	24.4 C	+0.70 C
1971	22.8 C	-0.93 C
1972	21.9 C	-1.82 C
1973	23.3 C	-0.35 C
1979	24.1 C	+0.44 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

1946 to 1980

Yearly extremes at Bir Mobhrein (Fort): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	49.0 C (120.2 F)	1974	46.7 C (116.1 F)	34
Coldest night (TNn)	1.0 C (33.8 F)	1946	5.3 C (41.5 F)	34
Wettest day (Rx1day)	64.5 mm (2.5 in)	1946	10.3 mm (0.4 in)	34
Wettest five days (Rx5day)	66.0 mm (2.6 in)	1969	11.3 mm (0.4 in)	34
Longest dry spell (CDD)	355 days	1948	177 days	34

Hottest day (TXx)

The hottest day of the year at Bir Mobhrein (Fort), 1946 to 1980. The record is 49.0 C (120.2 F) in 1974, marked on the chart; the median year is 46.7 C (116.1 F).

Hottest day (TXx) at Bir Mobhrein (Fort) by year
Year	Hottest day (TXx)
1946	46.8 C (116.2 F)
1947	46.0 C (114.8 F)
1948	47.0 C (116.6 F)
1949	48.0 C (118.4 F)
1950	46.3 C (115.3 F)
1951	47.2 C (117.0 F)
1952	46.5 C (115.7 F)
1953	46.9 C (116.4 F)
1954	48.0 C (118.4 F)
1955	47.6 C (117.7 F)
1956	45.8 C (114.4 F)
1957	46.8 C (116.2 F)
1958	46.2 C (115.2 F)
1959	46.6 C (115.9 F)
1960	46.3 C (115.3 F)
1961	47.1 C (116.8 F)
1962	46.5 C (115.7 F)
1963	48.5 C (119.3 F)
1964	46.8 C (116.2 F)
1965	46.0 C (114.8 F)
1967	46.8 C (116.2 F)
1968	47.2 C (117.0 F)
1969	46.0 C (114.8 F)
1970	46.9 C (116.4 F)
1971	45.9 C (114.6 F)
1972	47.4 C (117.3 F)
1973	46.4 C (115.5 F)
1974	49.0 C (120.2 F)
1975	45.9 C (114.6 F)
1976	46.0 C (114.8 F)
1977	30.3 C (86.5 F)
1978	47.0 C (116.6 F)
1979	46.0 C (114.8 F)
1980	46.4 C (115.5 F)

Coldest night (TNn)

The coldest night of the year at Bir Mobhrein (Fort), 1946 to 1980. The record is 1.0 C (33.8 F) in 1946, marked on the chart; the median year is 5.3 C (41.5 F).

Coldest night (TNn) at Bir Mobhrein (Fort) by year
Year	Coldest night (TNn)
1946	1.0 C (33.8 F)
1947	2.4 C (36.3 F)
1948	6.2 C (43.2 F)
1949	5.2 C (41.4 F)
1950	4.2 C (39.6 F)
1951	6.8 C (44.2 F)
1952	3.4 C (38.1 F)
1953	5.2 C (41.4 F)
1954	4.0 C (39.2 F)
1955	7.8 C (46.0 F)
1956	3.5 C (38.3 F)
1957	3.4 C (38.1 F)
1958	6.6 C (43.9 F)
1959	6.1 C (43.0 F)
1960	6.0 C (42.8 F)
1961	4.8 C (40.6 F)
1962	2.2 C (36.0 F)
1963	4.1 C (39.4 F)
1964	6.0 C (42.8 F)
1965	4.0 C (39.2 F)
1967	5.3 C (41.5 F)
1968	5.3 C (41.5 F)
1969	6.4 C (43.5 F)
1970	3.5 C (38.3 F)
1971	5.7 C (42.3 F)
1972	5.4 C (41.7 F)
1973	2.4 C (36.3 F)
1974	4.2 C (39.6 F)
1975	8.0 C (46.4 F)
1976	7.0 C (44.6 F)
1977	7.8 C (46.0 F)
1978	5.5 C (41.9 F)
1979	5.8 C (42.4 F)
1980	5.1 C (41.2 F)

Wettest day (Rx1day)

The wettest day of the year at Bir Mobhrein (Fort), 1946 to 1980. The record is 64.5 mm (2.5 in) in 1946, marked on the chart; the median year is 10.3 mm (0.4 in).

Wettest day (Rx1day) at Bir Mobhrein (Fort) by year
Year	Wettest day (Rx1day)
1946	64.5 mm (2.5 in)
1947	56.1 mm (2.2 in)
1948	2.0 mm (0.08 in)
1949	9.3 mm (0.37 in)
1950	37.8 mm (1.5 in)
1951	31.8 mm (1.3 in)
1952	10.8 mm (0.4 in)
1953	19.1 mm (0.8 in)
1954	9.9 mm (0.39 in)
1955	9.1 mm (0.36 in)
1956	19.3 mm (0.8 in)
1957	45.5 mm (1.8 in)
1958	5.6 mm (0.22 in)
1959	32.6 mm (1.3 in)
1960	5.2 mm (0.20 in)
1961	3.7 mm (0.15 in)
1962	10.6 mm (0.4 in)
1963	4.6 mm (0.18 in)
1964	8.0 mm (0.31 in)
1965	22.1 mm (0.9 in)
1967	30.5 mm (1.2 in)
1968	3.5 mm (0.14 in)
1969	56.8 mm (2.2 in)
1970	7.0 mm (0.28 in)
1971	33.8 mm (1.3 in)
1972	19.3 mm (0.8 in)
1973	8.4 mm (0.33 in)
1974	11.5 mm (0.5 in)
1975	2.8 mm (0.11 in)
1976	2.0 mm (0.08 in)
1977	0.0 mm (0.00 in)
1978	0.0 mm (0.00 in)
1979	21.6 mm (0.9 in)
1980	2.8 mm (0.11 in)

Wettest five days (Rx5day)

The wettest five days of the year at Bir Mobhrein (Fort), 1946 to 1980. The record is 66.0 mm (2.6 in) in 1969, marked on the chart; the median year is 11.3 mm (0.4 in).

Wettest five days (Rx5day) at Bir Mobhrein (Fort) by year
Year	Wettest five days (Rx5day)
1946	64.7 mm (2.5 in)
1947	64.5 mm (2.5 in)
1948	2.3 mm (0.09 in)
1949	9.6 mm (0.38 in)
1950	61.7 mm (2.4 in)
1951	34.9 mm (1.4 in)
1952	23.1 mm (0.9 in)
1953	25.3 mm (1.0 in)
1954	20.8 mm (0.8 in)
1955	9.1 mm (0.36 in)
1956	26.2 mm (1.0 in)
1957	57.3 mm (2.3 in)
1958	9.6 mm (0.38 in)
1959	32.6 mm (1.3 in)
1960	8.5 mm (0.33 in)
1961	3.7 mm (0.15 in)
1962	10.8 mm (0.4 in)
1963	10.8 mm (0.4 in)
1964	11.0 mm (0.4 in)
1965	39.6 mm (1.6 in)
1967	38.0 mm (1.5 in)
1968	4.0 mm (0.16 in)
1969	66.0 mm (2.6 in)
1970	7.9 mm (0.31 in)
1971	33.8 mm (1.3 in)
1972	19.3 mm (0.8 in)
1973	9.4 mm (0.37 in)
1974	11.5 mm (0.5 in)
1975	6.0 mm (0.24 in)
1976	2.4 mm (0.09 in)
1977	0.0 mm (0.00 in)
1978	0.0 mm (0.00 in)
1979	21.6 mm (0.9 in)
1980	2.8 mm (0.11 in)

Longest dry spell (CDD)

The longest dry spell of the year at Bir Mobhrein (Fort), 1946 to 1980. The record is 355 days in 1948, marked on the chart; the median year is 177 days.

Longest dry spell (CDD) at Bir Mobhrein (Fort) by year
Year	Longest dry spell (CDD)
1946	237 days
1947	194 days
1948	355 days
1949	178 days
1950	219 days
1951	201 days
1952	236 days
1953	150 days
1954	165 days
1955	101 days
1956	282 days
1957	212 days
1958	329 days
1959	176 days
1960	155 days
1961	185 days
1962	115 days
1963	231 days
1964	260 days
1965	92 days
1967	192 days
1968	160 days
1969	181 days
1970	159 days
1971	136 days
1972	117 days
1973	152 days
1974	109 days
1975	120 days
1976	137 days
1977	59 days
1978	245 days
1979	237 days
1980	176 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.

Rainfall Return Levels

31 years, 1946 to 1980

A day with at least 14.4 mm (0.6 in) of rain is expected about once in 2 years. A day with at least 95.8 mm (3.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Bir Mobhrein (Fort): the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	14.4 mm (0.6 in)
5 years	29.5 mm (1.2 in)
10 years	41.7 mm (1.6 in)
25 years	60.3 mm (2.4 in)
50 years	76.8 mm (3.0 in)	Longer than the 31 years of record
100 years	95.8 mm (3.8 in)	Longer than the 31 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, 31 years of values from 1946 to 1980.

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: 64.5 mm (2.5 in) in 1946; 56.8 mm (2.2 in) in 1969; 56.1 mm (2.2 in) in 1947.

Download the Data

Data for Bir Mobhrein (Fort) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Bir Mobhrein (Fort) 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).