Cotija Weather Records (MXN00016025)

Record envelope, standing records and threshold days for Cotija (MXN00016025), Mexico, with 62 years of record.

Key Facts for Cotija

Cotija (MXN00016025) is a weather station in Mexico at 19.72 latitude and -102.67 longitude, 2,341 m (7,680 ft) above sea level.
The station reports from 1924 to 1985, 62 years of record.
1,464 records set at Cotija still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Cotija tied a monthly record high minimum temperature of 20.0 C (68.0 F) on 25 July 1985.

About the Station

Location: Mexico, 19.72 latitude, -102.67 longitude.
Elevation: 2,341 m (7,680 ft).
Period of record: 1924 to 1985, 62 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 Cotija. 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 Cotija, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	32.8 C (91.0 F)	-1.7 C (28.9 F)	n/a	n/a
Feb	34.4 C (93.9 F)	-3.3 C (26.1 F)	n/a	n/a
Mar	36.7 C (98.1 F)	0.6 C (33.1 F)	n/a	n/a
Apr	38.9 C (102.0 F)	1.1 C (34.0 F)	n/a	n/a
May	40.0 C (104.0 F)	1.7 C (35.1 F)	n/a	n/a
Jun	40.0 C (104.0 F)	5.0 C (41.0 F)	n/a	n/a
Jul	38.9 C (102.0 F)	0.6 C (33.1 F)	n/a	n/a
Aug	33.9 C (93.0 F)	0.6 C (33.1 F)	n/a	n/a
Sep	35.6 C (96.1 F)	5.6 C (42.1 F)	n/a	n/a
Oct	33.9 C (93.0 F)	1.1 C (34.0 F)	n/a	n/a
Nov	33.9 C (93.0 F)	-2.2 C (28.0 F)	n/a	n/a
Dec	35.0 C (95.0 F)	-3.3 C (26.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Cotija still stand. 1965 holds the most, with 155.

Standing records at Cotija by the year they were set
Year set	Standing records
1924	36
1925	12
1926	1
1927	1
1929	3
1932	12
1933	4
1934	6
1935	2
1936	29
1937	32
1938	67
1939	39
1940	64
1941	9
1942	18
1943	27
1944	3
1945	27
1946	45
1947	8
1948	5
1949	5
1950	7
1951	15
1952	15
1953	27
1954	5
1955	7
1956	9
1957	15
1958	24
1959	8
1960	10
1961	3
1962	25
1963	7
1964	13
1965	155
1966	30
1967	85
1968	57
1971	13
1972	23
1973	22
1974	26
1975	17
1976	42
1977	23
1978	49
1979	31
1980	37
1981	8
1982	9
1983	68
1984	114
1985	10

Wettest Day of Each Month

Jul: 89.9 mm (3.5 in)

The wettest day on record for each calendar month at Cotija. The most was 89.9 mm (3.5 in) on 15 July 1945.

Record daily precipitation for each month at Cotija
Month	Record daily precipitation (mm)	Date
Jan	79.8 mm (3.1 in)	26 January 1931
Feb	34.8 mm (1.4 in)	23 February 1930
Mar	22.9 mm (0.9 in)	27 March 1981
Apr	31.8 mm (1.3 in)	15 April 1959
May	45.0 mm (1.8 in)	24 May 1940
Jun	75.9 mm (3.0 in)	12 June 1926
Jul	89.9 mm (3.5 in)	15 July 1945
Aug	79.8 mm (3.1 in)	5 August 1967
Sep	59.9 mm (2.4 in)	24 September 1967
Oct	67.8 mm (2.7 in)	16 October 1955
Nov	46.0 mm (1.8 in)	11 November 1930
Dec	79.8 mm (3.1 in)	6 December 1925

Period of Record Coverage

1924 to 1985

60 years of record at Cotija, 1924 to 1985. 20 years have data for under 90 percent of days and are left out of rankings: 1924, 1928, 1929, 1930, 1932, 1934, 1935, 1942 and others.

Days with data per year at Cotija
Year	Days with data	Share of year	Complete
1924	184	50%	No
1925	365	100%	Yes
1926	365	100%	Yes
1927	333	91%	Yes
1928	213	58%	No
1929	144	39%	No
1930	30	8%	No
1932	159	43%	No
1933	355	97%	Yes
1934	234	64%	No
1935	145	40%	No
1936	365	100%	Yes
1937	365	100%	Yes
1938	364	100%	Yes
1939	365	100%	Yes
1940	366	100%	Yes
1941	365	100%	Yes
1942	306	84%	No
1943	273	75%	No
1944	242	66%	No
1945	361	99%	Yes
1946	365	100%	Yes
1947	363	99%	Yes
1948	366	100%	Yes
1949	365	100%	Yes
1950	365	100%	Yes
1951	335	92%	Yes
1952	366	100%	Yes
1953	274	75%	No
1954	365	100%	Yes
1955	365	100%	Yes
1956	366	100%	Yes
1957	335	92%	Yes
1958	364	100%	Yes
1959	363	99%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	363	99%	Yes
1963	365	100%	Yes
1964	274	75%	No
1965	365	100%	Yes
1966	333	91%	Yes
1967	355	97%	Yes
1968	356	97%	Yes
1970	327	90%	No
1971	338	93%	Yes
1972	354	97%	Yes
1973	351	96%	Yes
1974	358	98%	Yes
1975	322	88%	No
1976	347	95%	Yes
1977	321	88%	No
1978	347	95%	Yes
1979	312	85%	No
1980	322	88%	No
1981	227	62%	No
1982	333	91%	Yes
1983	353	97%	Yes
1984	178	49%	No
1985	212	58%	No

Latest Records

Latest records at Cotija
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
25 July 1985	Cotija, MX	monthly high min (Tie)	20.0 C (68.0 F)	tie	47 years	7 of 100 (Routine)
24 July 1985	Cotija, MX	daily rain	59.9 mm (2.4 in)	32.0 mm (1.3 in)	12 years	39 of 100 (Notable)
22 July 1985	Cotija, MX	daily rain	59.9 mm (2.4 in)	29.9 mm (1.2 in)	59 years	51 of 100 (Notable)
20 July 1985	Cotija, MX	daily rain	54.9 mm (2.2 in)	27.0 mm (1.1 in)	32 years	40 of 100 (Notable)
19 July 1985	Cotija, MX	daily rain	47.8 mm (1.9 in)	21.4 mm (0.8 in)	32 years	35 of 100 (Notable)
16 July 1985	Cotija, MX	daily rain	63.8 mm (2.5 in)	33.8 mm (1.3 in)	14 years	41 of 100 (Notable)
13 July 1985	Cotija, MX	daily high min (Tie)	17.8 C (64.0 F)	tie	28 years	3 of 100 (Routine)
12 July 1985	Cotija, MX	daily rain	23.9 mm (0.9 in)	1.0 mm (0.04 in)	6 years	7 of 100 (Routine)
12 July 1985	Cotija, MX	daily high min (Tie)	17.8 C (64.0 F)	tie	38 years	4 of 100 (Routine)
8 July 1985	Cotija, MX	daily rain	63.0 mm (2.5 in)	39.1 mm (1.5 in)	8 years	44 of 100 (Notable)
4 July 1985	Cotija, MX	monthly high max	38.9 C (102.0 F)	3.3 C (5.9 F)	31 years	33 of 100 (Routine)
4 July 1985	Cotija, MX	daily rain	48.8 mm (1.9 in)	3.8 mm (0.15 in)	35 years	19 of 100 (Routine)
3 July 1985	Cotija, MX	daily rain	45.0 mm (1.8 in)	5.1 mm (0.20 in)	18 years	15 of 100 (Routine)
27 June 1985	Cotija, MX	daily rain	41.9 mm (1.6 in)	2.0 mm (0.08 in)	22 years	14 of 100 (Routine)
23 June 1985	Cotija, MX	daily rain	46.0 mm (1.8 in)	22.1 mm (0.9 in)	27 years	36 of 100 (Notable)
10 June 1985	Cotija, MX	daily rain	46.0 mm (1.8 in)	21.1 mm (0.8 in)	8 years	29 of 100 (Routine)
5 June 1985	Cotija, MX	daily rain (Tie)	23.9 mm (0.9 in)	tie	27 years	3 of 100 (Routine)
1 June 1985	Cotija, MX	daily high min (Tie)	20.0 C (68.0 F)	tie	42 years	4 of 100 (Routine)
18 May 1985	Cotija, MX	daily rain	33.8 mm (1.3 in)	8.9 mm (0.35 in)	11 years	19 of 100 (Routine)
2 May 1985	Cotija, MX	all-time high min (Tie)	21.7 C (71.1 F)	tie	33 years	9 of 100 (Routine)

Climate Trend

34 complete years, 1925 to 1983

One stripe for each of 34 complete years at Cotija, 1925 to 1983. Blue stripes are years cooler than the station's own mean of 18.0 C (64.5 F); red stripes are warmer. The coolest year was 1978, at 14.4 C (57.8 F), and the warmest was 1968, at 20.5 C (69.0 F). The strongest colour marks a difference of 3.7 C (6.7 F).

Annual mean temperature at Cotija as warming stripes, 1925 to 1983
Year	Annual mean temperature	Difference from the station mean
1925	18.8 C	+0.72 C
1926	18.0 C	0.00 C
1933	18.8 C	+0.74 C
1936	16.5 C	-1.56 C
1937	16.2 C	-1.86 C
1938	14.9 C	-3.11 C
1939	15.7 C	-2.39 C
1940	18.4 C	+0.31 C
1941	18.5 C	+0.50 C
1945	18.4 C	+0.40 C
1946	17.8 C	-0.27 C
1947	18.4 C	+0.31 C
1948	19.0 C	+0.98 C
1949	19.3 C	+1.21 C
1950	19.4 C	+1.35 C
1952	19.9 C	+1.90 C
1954	19.5 C	+1.43 C
1955	19.2 C	+1.12 C
1956	19.0 C	+1.00 C
1958	19.6 C	+1.53 C
1959	18.8 C	+0.77 C
1960	20.0 C	+1.98 C
1961	19.9 C	+1.84 C
1962	20.5 C	+2.46 C
1963	19.9 C	+1.90 C
1965	19.1 C	+1.07 C
1967	19.8 C	+1.76 C
1968	20.5 C	+2.50 C
1972	14.8 C	-3.25 C
1973	14.7 C	-3.31 C
1974	15.0 C	-3.05 C
1976	14.7 C	-3.35 C
1978	14.4 C	-3.69 C
1983	16.1 C	-1.92 C

The fitted trend in annual mean temperature here over 1925 to 1983 is -0.2 C (-0.7 to 0.2) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.4 F (-1.3 to 0.4) per decade. The slope is a straight line fitted to 34 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Cotija
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.2 C (-0.7 to 0.2) per decade	-0.4 F (-1.3 to 0.4) per decade	1925 to 1983	34	Not clearly different from zero
Mean daily maximum	-0.5 C (-1.3 to 0.3) per decade	-0.9 F (-2.3 to 0.5) per decade	1925 to 1983	34	Not clearly different from zero
Mean daily minimum	0.02 C (-0.43 to 0.47) per decade	0.04 F (-0.77 to 0.85) per decade	1925 to 1983	34	Not clearly different from zero

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

1924 to 1985

Yearly extremes at Cotija: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.0 C (104.0 F)	1938	35.0 C (95.0 F)	60
Coldest night (TNn)	-3.3 C (26.1 F)	1940	2.2 C (36.0 F)	60
Wettest day (Rx1day)	89.9 mm (3.5 in)	1945	38.9 mm (1.5 in)	61
Wettest five days (Rx5day)	214.6 mm (8.4 in)	1985	80.6 mm (3.2 in)	61
Longest dry spell (CDD)	163 days	1960	67 days	61

Hottest day (TXx)

The hottest day of the year at Cotija, 1924 to 1985. The record is 40.0 C (104.0 F) in 1938, marked on the chart; the median year is 35.0 C (95.0 F).

Hottest day (TXx) at Cotija by year
Year	Hottest day (TXx)
1924	31.7 C (89.1 F)
1925	35.0 C (95.0 F)
1926	27.8 C (82.0 F)
1927	30.0 C (86.0 F)
1928	31.7 C (89.1 F)
1929	35.0 C (95.0 F)
1930	33.9 C (93.0 F)
1931	n/a
1932	32.8 C (91.0 F)
1933	35.6 C (96.1 F)
1934	32.8 C (91.0 F)
1935	30.0 C (86.0 F)
1936	37.8 C (100.0 F)
1937	38.3 C (100.9 F)
1938	40.0 C (104.0 F)
1939	37.8 C (100.0 F)
1940	37.2 C (99.0 F)
1941	36.1 C (97.0 F)
1942	38.9 C (102.0 F)
1943	37.2 C (99.0 F)
1944	37.2 C (99.0 F)
1945	35.0 C (95.0 F)
1946	31.7 C (89.1 F)
1947	31.1 C (88.0 F)
1948	35.0 C (95.0 F)
1949	33.3 C (91.9 F)
1950	35.0 C (95.0 F)
1951	35.6 C (96.1 F)
1952	37.2 C (99.0 F)
1953	35.6 C (96.1 F)
1954	35.0 C (95.0 F)
1955	35.6 C (96.1 F)
1956	35.6 C (96.1 F)
1957	32.8 C (91.0 F)
1958	33.9 C (93.0 F)
1959	30.6 C (87.1 F)
1960	35.6 C (96.1 F)
1961	35.0 C (95.0 F)
1962	35.6 C (96.1 F)
1963	36.7 C (98.1 F)
1964	35.6 C (96.1 F)
1965	38.9 C (102.0 F)
1966	33.9 C (93.0 F)
1967	40.0 C (104.0 F)
1968	40.0 C (104.0 F)
1970	31.7 C (89.1 F)
1971	30.6 C (87.1 F)
1972	32.8 C (91.0 F)
1973	30.0 C (86.0 F)
1974	30.6 C (87.1 F)
1975	25.6 C (78.1 F)
1976	26.7 C (80.1 F)
1977	28.9 C (84.0 F)
1978	22.8 C (73.0 F)
1979	27.8 C (82.0 F)
1980	25.0 C (77.0 F)
1981	28.9 C (84.0 F)
1982	27.8 C (82.0 F)
1983	30.0 C (86.0 F)
1984	35.6 C (96.1 F)
1985	38.9 C (102.0 F)

Coldest night (TNn)

The coldest night of the year at Cotija, 1924 to 1985. The record is -3.3 C (26.1 F) in 1940, marked on the chart; the median year is 2.2 C (36.0 F).

Coldest night (TNn) at Cotija by year
Year	Coldest night (TNn)
1924	0.6 C (33.1 F)
1925	1.7 C (35.1 F)
1926	5.0 C (41.0 F)
1927	10.0 C (50.0 F)
1928	6.7 C (44.1 F)
1929	5.0 C (41.0 F)
1930	7.8 C (46.0 F)
1931	n/a
1932	1.7 C (35.1 F)
1933	3.9 C (39.0 F)
1934	2.2 C (36.0 F)
1935	0.6 C (33.1 F)
1936	0.0 C (32.0 F)
1937	0.0 C (32.0 F)
1938	-1.7 C (28.9 F)
1939	0.0 C (32.0 F)
1940	-3.3 C (26.1 F)
1941	0.0 C (32.0 F)
1942	-3.3 C (26.1 F)
1943	-2.2 C (28.0 F)
1944	0.0 C (32.0 F)
1945	2.2 C (36.0 F)
1946	6.7 C (44.1 F)
1947	5.0 C (41.0 F)
1948	2.8 C (37.0 F)
1949	2.8 C (37.0 F)
1950	3.9 C (39.0 F)
1951	5.0 C (41.0 F)
1952	3.3 C (37.9 F)
1953	0.0 C (32.0 F)
1954	-2.2 C (28.0 F)
1955	0.0 C (32.0 F)
1956	0.0 C (32.0 F)
1957	5.6 C (42.1 F)
1958	5.6 C (42.1 F)
1959	5.6 C (42.1 F)
1960	2.8 C (37.0 F)
1961	2.8 C (37.0 F)
1962	1.7 C (35.1 F)
1963	1.7 C (35.1 F)
1964	3.9 C (39.0 F)
1965	0.6 C (33.1 F)
1966	1.7 C (35.1 F)
1967	0.0 C (32.0 F)
1968	5.6 C (42.1 F)
1970	0.0 C (32.0 F)
1971	1.1 C (34.0 F)
1972	3.9 C (39.0 F)
1973	3.9 C (39.0 F)
1974	5.0 C (41.0 F)
1975	0.0 C (32.0 F)
1976	0.0 C (32.0 F)
1977	2.8 C (37.0 F)
1978	1.7 C (35.1 F)
1979	5.6 C (42.1 F)
1980	6.7 C (44.1 F)
1981	0.0 C (32.0 F)
1982	0.0 C (32.0 F)
1983	7.8 C (46.0 F)
1984	12.8 C (55.0 F)
1985	10.0 C (50.0 F)

Wettest day (Rx1day)

The wettest day of the year at Cotija, 1924 to 1985. The record is 89.9 mm (3.5 in) in 1945, marked on the chart; the median year is 38.9 mm (1.5 in).

Wettest day (Rx1day) at Cotija by year
Year	Wettest day (Rx1day)
1924	38.9 mm (1.5 in)
1925	79.8 mm (3.1 in)
1926	75.9 mm (3.0 in)
1927	10.9 mm (0.4 in)
1928	13.7 mm (0.5 in)
1929	29.5 mm (1.2 in)
1930	46.0 mm (1.8 in)
1931	79.8 mm (3.1 in)
1932	28.7 mm (1.1 in)
1933	53.1 mm (2.1 in)
1934	42.9 mm (1.7 in)
1935	45.0 mm (1.8 in)
1936	30.0 mm (1.2 in)
1937	47.0 mm (1.9 in)
1938	36.3 mm (1.4 in)
1939	70.4 mm (2.8 in)
1940	50.0 mm (2.0 in)
1941	60.7 mm (2.4 in)
1942	35.3 mm (1.4 in)
1943	37.3 mm (1.5 in)
1944	26.2 mm (1.0 in)
1945	89.9 mm (3.5 in)
1946	35.8 mm (1.4 in)
1947	41.9 mm (1.6 in)
1948	28.2 mm (1.1 in)
1949	38.9 mm (1.5 in)
1950	61.2 mm (2.4 in)
1951	28.4 mm (1.1 in)
1952	68.3 mm (2.7 in)
1953	29.0 mm (1.1 in)
1954	59.4 mm (2.3 in)
1955	67.8 mm (2.7 in)
1956	45.0 mm (1.8 in)
1957	65.8 mm (2.6 in)
1958	43.9 mm (1.7 in)
1959	64.8 mm (2.6 in)
1960	31.8 mm (1.3 in)
1961	39.9 mm (1.6 in)
1962	34.8 mm (1.4 in)
1963	49.8 mm (2.0 in)
1964	41.9 mm (1.6 in)
1965	45.0 mm (1.8 in)
1966	34.8 mm (1.4 in)
1967	79.8 mm (3.1 in)
1968	34.8 mm (1.4 in)
1970	45.0 mm (1.8 in)
1971	45.0 mm (1.8 in)
1972	34.8 mm (1.4 in)
1973	35.8 mm (1.4 in)
1974	25.9 mm (1.0 in)
1975	29.0 mm (1.1 in)
1976	25.9 mm (1.0 in)
1977	23.9 mm (0.9 in)
1978	40.9 mm (1.6 in)
1979	29.0 mm (1.1 in)
1980	31.0 mm (1.2 in)
1981	25.9 mm (1.0 in)
1982	22.9 mm (0.9 in)
1983	30.0 mm (1.2 in)
1984	7.9 mm (0.31 in)
1985	63.8 mm (2.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Cotija, 1924 to 1985. The record is 214.6 mm (8.4 in) in 1985, marked on the chart; the median year is 80.6 mm (3.2 in).

Wettest five days (Rx5day) at Cotija by year
Year	Wettest five days (Rx5day)
1924	64.6 mm (2.5 in)
1925	89.7 mm (3.5 in)
1926	116.8 mm (4.6 in)
1927	28.4 mm (1.1 in)
1928	37.3 mm (1.5 in)
1929	74.7 mm (2.9 in)
1930	129.3 mm (5.1 in)
1931	134.7 mm (5.3 in)
1932	57.4 mm (2.3 in)
1933	81.0 mm (3.2 in)
1934	78.2 mm (3.1 in)
1935	73.4 mm (2.9 in)
1936	63.5 mm (2.5 in)
1937	88.9 mm (3.5 in)
1938	70.1 mm (2.8 in)
1939	105.4 mm (4.1 in)
1940	83.5 mm (3.3 in)
1941	98.8 mm (3.9 in)
1942	59.5 mm (2.3 in)
1943	66.0 mm (2.6 in)
1944	85.6 mm (3.4 in)
1945	179.1 mm (7.1 in)
1946	56.2 mm (2.2 in)
1947	100.4 mm (4.0 in)
1948	53.8 mm (2.1 in)
1949	52.1 mm (2.1 in)
1950	99.9 mm (3.9 in)
1951	46.2 mm (1.8 in)
1952	107.2 mm (4.2 in)
1953	59.5 mm (2.3 in)
1954	113.3 mm (4.5 in)
1955	131.3 mm (5.2 in)
1956	117.6 mm (4.6 in)
1957	80.3 mm (3.2 in)
1958	70.6 mm (2.8 in)
1959	98.3 mm (3.9 in)
1960	58.1 mm (2.3 in)
1961	61.7 mm (2.4 in)
1962	89.4 mm (3.5 in)
1963	80.6 mm (3.2 in)
1964	72.3 mm (2.8 in)
1965	75.4 mm (3.0 in)
1966	90.3 mm (3.6 in)
1967	134.6 mm (5.3 in)
1968	76.5 mm (3.0 in)
1970	149.4 mm (5.9 in)
1971	69.9 mm (2.8 in)
1972	124.5 mm (4.9 in)
1973	87.4 mm (3.4 in)
1974	90.5 mm (3.6 in)
1975	86.0 mm (3.4 in)
1976	97.3 mm (3.8 in)
1977	95.9 mm (3.8 in)
1978	74.6 mm (2.9 in)
1979	86.0 mm (3.4 in)
1980	72.1 mm (2.8 in)
1981	60.4 mm (2.4 in)
1982	51.6 mm (2.0 in)
1983	74.5 mm (2.9 in)
1984	7.9 mm (0.31 in)
1985	214.6 mm (8.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Cotija, 1924 to 1985. The record is 163 days in 1960, marked on the chart; the median year is 67 days.

Longest dry spell (CDD) at Cotija by year
Year	Longest dry spell (CDD)
1924	75 days
1925	30 days
1926	58 days
1927	31 days
1928	68 days
1929	33 days
1930	38 days
1931	35 days
1932	72 days
1933	101 days
1934	59 days
1935	25 days
1936	47 days
1937	72 days
1938	53 days
1939	127 days
1940	45 days
1941	28 days
1942	80 days
1943	32 days
1944	29 days
1945	140 days
1946	43 days
1947	85 days
1948	35 days
1949	54 days
1950	79 days
1951	50 days
1952	46 days
1953	86 days
1954	63 days
1955	152 days
1956	112 days
1957	127 days
1958	78 days
1959	98 days
1960	163 days
1961	66 days
1962	102 days
1963	104 days
1964	63 days
1965	67 days
1966	42 days
1967	88 days
1968	90 days
1970	84 days
1971	48 days
1972	96 days
1973	131 days
1974	67 days
1975	68 days
1976	69 days
1977	89 days
1978	100 days
1979	51 days
1980	62 days
1981	25 days
1982	61 days
1983	124 days
1984	30 days
1985	136 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

45 years, 1925 to 1983

A day with at least 43.3 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 106.3 mm (4.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Cotija: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	43.3 mm (1.7 in)
5 years	60.2 mm (2.4 in)
10 years	71.3 mm (2.8 in)
25 years	85.5 mm (3.4 in)
50 years	95.9 mm (3.8 in)	Longer than the 45 years of record
100 years	106.3 mm (4.2 in)	Longer than the 45 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, 45 years of values from 1925 to 1983.

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: 89.9 mm (3.5 in) in 1945; 79.8 mm (3.1 in) in 1925; 79.8 mm (3.1 in) in 1931.

Download the Data

Data for Cotija standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Cotija 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).