Chiautla de Tapia Weather Records (MXN00021116)

Record envelope, standing records and threshold days for Chiautla de Tapia (MXN00021116), Mexico, with 67 years of record.

Key Facts for Chiautla de Tapia

Chiautla de Tapia (MXN00021116) is a weather station in Mexico at 18.28 latitude and -98.60 longitude, 991 m (3,251 ft) above sea level.
The station reports from 1927 to 1993, 67 years of record.
1,464 records set at Chiautla de Tapia still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Chiautla de Tapia set a daily record high minimum temperature of 18.3 C (64.9 F) on 7 November 1993.

About the Station

Location: Mexico, 18.28 latitude, -98.60 longitude.
Elevation: 991 m (3,251 ft).
Period of record: 1927 to 1993, 67 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 Chiautla de Tapia. 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 Chiautla de Tapia, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	37.8 C (100.0 F)	0.6 C (33.1 F)	n/a	n/a
Feb	40.0 C (104.0 F)	1.7 C (35.1 F)	n/a	n/a
Mar	43.9 C (111.0 F)	3.9 C (39.0 F)	n/a	n/a
Apr	45.6 C (114.1 F)	3.9 C (39.0 F)	n/a	n/a
May	42.8 C (109.0 F)	6.7 C (44.1 F)	n/a	n/a
Jun	48.9 C (120.0 F)	7.8 C (46.0 F)	n/a	n/a
Jul	43.9 C (111.0 F)	10.0 C (50.0 F)	n/a	n/a
Aug	45.0 C (113.0 F)	8.9 C (48.0 F)	n/a	n/a
Sep	45.0 C (113.0 F)	6.7 C (44.1 F)	n/a	n/a
Oct	45.0 C (113.0 F)	1.7 C (35.1 F)	n/a	n/a
Nov	37.2 C (99.0 F)	1.7 C (35.1 F)	n/a	n/a
Dec	38.9 C (102.0 F)	0.0 C (32.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Chiautla de Tapia still stand. 1930 holds the most, with 187.

Standing records at Chiautla de Tapia by the year they were set
Year set	Standing records
1927	23
1928	48
1929	49
1930	187
1931	9
1932	50
1933	31
1934	22
1935	49
1936	26
1937	19
1938	17
1939	19
1940	36
1941	44
1942	26
1943	31
1944	17
1945	17
1946	19
1947	19
1948	18
1960	18
1961	81
1962	20
1963	9
1964	19
1965	19
1966	103
1967	145
1968	81
1969	2
1972	15
1974	35
1975	3
1978	22
1979	1
1989	6
1990	30
1991	35
1992	21
1993	23

Wettest Day of Each Month

Aug: 96.8 mm (3.8 in)

The wettest day on record for each calendar month at Chiautla de Tapia. The most was 96.8 mm (3.8 in) on 24 August 1934.

Record daily precipitation for each month at Chiautla de Tapia
Month	Record daily precipitation (mm)	Date
Jan	50.8 mm (2.0 in)	26 January 1992
Feb	56.9 mm (2.2 in)	23 February 1958
Mar	30.0 mm (1.2 in)	27 March 1935
Apr	31.8 mm (1.3 in)	23 April 1967
May	72.9 mm (2.9 in)	27 May 1931
Jun	90.9 mm (3.6 in)	22 June 1949
Jul	82.3 mm (3.2 in)	9 July 1991
Aug	96.8 mm (3.8 in)	24 August 1934
Sep	95.0 mm (3.7 in)	1 September 1928
Oct	69.9 mm (2.8 in)	3 October 1962
Nov	32.8 mm (1.3 in)	6 November 1946
Dec	23.9 mm (0.9 in)	27 December 1962

Period of Record Coverage

1927 to 1993

44 years of record at Chiautla de Tapia, 1927 to 1993. 20 years have data for under 90 percent of days and are left out of rankings: 1927, 1931, 1933, 1948, 1957, 1960, 1961, 1966 and others.

Days with data per year at Chiautla de Tapia
Year	Days with data	Share of year	Complete
1927	92	25%	No
1928	366	100%	Yes
1929	365	100%	Yes
1930	365	100%	Yes
1931	249	68%	No
1932	350	96%	Yes
1933	323	88%	No
1934	349	96%	Yes
1935	365	100%	Yes
1936	365	100%	Yes
1937	365	100%	Yes
1938	365	100%	Yes
1939	365	100%	Yes
1940	334	91%	Yes
1941	365	100%	Yes
1942	364	100%	Yes
1943	365	100%	Yes
1944	365	100%	Yes
1945	365	100%	Yes
1946	365	100%	Yes
1947	365	100%	Yes
1948	305	83%	No
1957	31	8%	No
1960	29	8%	No
1961	151	41%	No
1962	365	100%	Yes
1963	363	99%	Yes
1964	365	100%	Yes
1965	363	99%	Yes
1966	300	82%	No
1967	304	83%	No
1968	273	75%	No
1969	31	8%	No
1972	123	34%	No
1973	92	25%	No
1974	110	30%	No
1975	30	8%	No
1978	121	33%	No
1979	61	17%	No
1989	151	41%	No
1990	364	100%	Yes
1991	363	99%	Yes
1992	306	84%	No
1993	326	89%	No

Latest Records

Latest records at Chiautla de Tapia
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
7 November 1993	Chiautla de Tapia, MX	daily high min	18.3 C (64.9 F)	0.5 C (0.9 F)	32 years	16 of 100 (Routine)
29 October 1993	Chiautla de Tapia, MX	daily high min	21.1 C (70.0 F)	0.5 C (0.9 F)	27 years	15 of 100 (Routine)
6 October 1993	Chiautla de Tapia, MX	daily high min (Tie)	20.6 C (69.1 F)	tie	27 years	3 of 100 (Routine)
21 September 1993	Chiautla de Tapia, MX	daily low max	25.6 C (78.1 F)	2.2 C (4.0 F)	28 years	21 of 100 (Routine)
21 September 1993	Chiautla de Tapia, MX	daily high min (Tie)	20.0 C (68.0 F)	tie	47 years	5 of 100 (Routine)
23 August 1993	Chiautla de Tapia, MX	daily high min (Tie)	20.0 C (68.0 F)	tie	56 years	5 of 100 (Routine)
20 August 1993	Chiautla de Tapia, MX	daily high min	21.1 C (70.0 F)	1.1 C (2.0 F)	27 years	18 of 100 (Routine)
19 August 1993	Chiautla de Tapia, MX	daily high min (Tie)	20.0 C (68.0 F)	tie	31 years	3 of 100 (Routine)
14 August 1993	Chiautla de Tapia, MX	daily high min	23.3 C (73.9 F)	2.2 C (4.0 F)	0 years	14 of 100 (Routine)
11 August 1993	Chiautla de Tapia, MX	daily high min (Tie)	21.1 C (70.0 F)	tie	0 years	1 of 100 (Routine)
9 August 1993	Chiautla de Tapia, MX	daily high min	21.1 C (70.0 F)	0.5 C (0.9 F)	48 years	21 of 100 (Routine)
7 August 1993	Chiautla de Tapia, MX	daily high min	21.1 C (70.0 F)	0.5 C (0.9 F)	27 years	15 of 100 (Routine)
6 August 1993	Chiautla de Tapia, MX	daily low max (Tie)	30.0 C (86.0 F)	tie	60 years	6 of 100 (Routine)
1 August 1993	Chiautla de Tapia, MX	daily high min	21.1 C (70.0 F)	0.5 C (0.9 F)	47 years	21 of 100 (Routine)
25 July 1993	Chiautla de Tapia, MX	daily high min	21.1 C (70.0 F)	0.5 C (0.9 F)	47 years	21 of 100 (Routine)
16 July 1993	Chiautla de Tapia, MX	daily low max (Tie)	30.0 C (86.0 F)	tie	52 years	5 of 100 (Routine)
11 July 1993	Chiautla de Tapia, MX	daily high min	21.1 C (70.0 F)	0.5 C (0.9 F)	27 years	15 of 100 (Routine)
3 July 1993	Chiautla de Tapia, MX	daily low max (Tie)	30.0 C (86.0 F)	tie	62 years	6 of 100 (Routine)
20 June 1993	Chiautla de Tapia, MX	daily high min	22.2 C (72.0 F)	1.6 C (2.9 F)	56 years	28 of 100 (Routine)
19 June 1993	Chiautla de Tapia, MX	daily high min	21.7 C (71.1 F)	1.1 C (2.0 F)	56 years	26 of 100 (Routine)

Climate Trend

19 complete years, 1928 to 1991

One stripe for each of 19 complete years at Chiautla de Tapia, 1928 to 1991. Blue stripes are years cooler than the station's own mean of 23.9 C (75.0 F); red stripes are warmer. The coolest year was 1930, at 22.0 C (71.5 F), and the warmest was 1990, at 25.9 C (78.6 F). The strongest colour marks a difference of 2.0 C (3.6 F).

Annual mean temperature at Chiautla de Tapia as warming stripes, 1928 to 1991
Year	Annual mean temperature	Difference from the station mean
1928	25.5 C	+1.60 C
1929	23.5 C	-0.39 C
1930	22.0 C	-1.95 C
1935	22.7 C	-1.23 C
1936	23.6 C	-0.35 C
1937	23.3 C	-0.59 C
1938	22.8 C	-1.15 C
1939	22.4 C	-1.53 C
1941	24.0 C	+0.10 C
1942	24.0 C	+0.11 C
1943	22.3 C	-1.65 C
1944	24.0 C	+0.03 C
1945	24.8 C	+0.89 C
1946	24.7 C	+0.75 C
1947	24.4 C	+0.52 C
1962	24.8 C	+0.84 C
1963	24.1 C	+0.20 C
1990	25.9 C	+1.98 C
1991	25.7 C	+1.75 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

1927 to 1993

Yearly extremes at Chiautla de Tapia: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	48.9 C (120.0 F)	1968	40.0 C (104.0 F)	44
Coldest night (TNn)	0.0 C (32.0 F)	1943	5.6 C (42.1 F)	43
Wettest day (Rx1day)	96.8 mm (3.8 in)	1934	53.8 mm (2.1 in)	53
Wettest five days (Rx5day)	257.6 mm (10.1 in)	1992	106.8 mm (4.2 in)	53
Longest dry spell (CDD)	153 days	1961	71 days	53

Hottest day (TXx)

The hottest day of the year at Chiautla de Tapia, 1927 to 1993. The record is 48.9 C (120.0 F) in 1968, marked on the chart; the median year is 40.0 C (104.0 F).

Hottest day (TXx) at Chiautla de Tapia by year
Year	Hottest day (TXx)
1927	37.8 C (100.0 F)
1928	41.1 C (106.0 F)
1929	41.1 C (106.0 F)
1930	41.1 C (106.0 F)
1931	40.0 C (104.0 F)
1932	39.4 C (102.9 F)
1933	41.1 C (106.0 F)
1934	40.6 C (105.1 F)
1935	40.6 C (105.1 F)
1936	40.6 C (105.1 F)
1937	40.6 C (105.1 F)
1938	40.0 C (104.0 F)
1939	40.0 C (104.0 F)
1940	41.7 C (107.1 F)
1941	42.8 C (109.0 F)
1942	41.7 C (107.1 F)
1943	40.6 C (105.1 F)
1944	40.0 C (104.0 F)
1945	40.0 C (104.0 F)
1946	40.0 C (104.0 F)
1947	40.0 C (104.0 F)
1948	40.0 C (104.0 F)
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	36.7 C (98.1 F)
1958	n/a
1959	n/a
1960	25.6 C (78.1 F)
1961	35.0 C (95.0 F)
1962	38.9 C (102.0 F)
1963	40.6 C (105.1 F)
1964	40.0 C (104.0 F)
1965	40.0 C (104.0 F)
1966	40.0 C (104.0 F)
1967	45.6 C (114.1 F)
1968	48.9 C (120.0 F)
1969	35.6 C (96.1 F)
1972	40.6 C (105.1 F)
1973	35.6 C (96.1 F)
1974	43.9 C (111.0 F)
1975	40.0 C (104.0 F)
1978	43.9 C (111.0 F)
1979	38.9 C (102.0 F)
1989	35.6 C (96.1 F)
1990	42.8 C (109.0 F)
1991	42.8 C (109.0 F)
1992	38.9 C (102.0 F)
1993	39.4 C (102.9 F)

Coldest night (TNn)

The coldest night of the year at Chiautla de Tapia, 1927 to 1993. The record is 0.0 C (32.0 F) in 1943, marked on the chart; the median year is 5.6 C (42.1 F).

Coldest night (TNn) at Chiautla de Tapia by year
Year	Coldest night (TNn)
1927	7.8 C (46.0 F)
1928	3.9 C (39.0 F)
1929	2.8 C (37.0 F)
1930	1.7 C (35.1 F)
1931	5.6 C (42.1 F)
1932	1.1 C (34.0 F)
1933	0.6 C (33.1 F)
1934	2.8 C (37.0 F)
1935	0.6 C (33.1 F)
1936	1.7 C (35.1 F)
1937	3.9 C (39.0 F)
1938	1.7 C (35.1 F)
1939	1.7 C (35.1 F)
1940	0.6 C (33.1 F)
1941	2.8 C (37.0 F)
1942	1.1 C (34.0 F)
1943	0.0 C (32.0 F)
1944	3.9 C (39.0 F)
1945	7.8 C (46.0 F)
1946	3.9 C (39.0 F)
1947	6.1 C (43.0 F)
1948	6.7 C (44.1 F)
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	10.0 C (50.0 F)
1958	n/a
1959	n/a
1960	n/a
1961	10.6 C (51.1 F)
1962	10.0 C (50.0 F)
1963	6.7 C (44.1 F)
1964	13.9 C (57.0 F)
1965	5.6 C (42.1 F)
1966	8.9 C (48.0 F)
1967	5.6 C (42.1 F)
1968	5.6 C (42.1 F)
1969	8.9 C (48.0 F)
1972	12.8 C (55.0 F)
1973	11.7 C (53.1 F)
1974	5.6 C (42.1 F)
1975	15.6 C (60.1 F)
1978	5.0 C (41.0 F)
1979	15.0 C (59.0 F)
1989	5.0 C (41.0 F)
1990	7.8 C (46.0 F)
1991	10.0 C (50.0 F)
1992	6.7 C (44.1 F)
1993	10.6 C (51.1 F)

Wettest day (Rx1day)

The wettest day of the year at Chiautla de Tapia, 1927 to 1993. The record is 96.8 mm (3.8 in) in 1934, marked on the chart; the median year is 53.8 mm (2.1 in).

Wettest day (Rx1day) at Chiautla de Tapia by year
Year	Wettest day (Rx1day)
1927	26.9 mm (1.1 in)
1928	95.0 mm (3.7 in)
1929	77.2 mm (3.0 in)
1930	70.4 mm (2.8 in)
1931	72.9 mm (2.9 in)
1932	37.8 mm (1.5 in)
1933	62.5 mm (2.5 in)
1934	96.8 mm (3.8 in)
1935	81.8 mm (3.2 in)
1936	79.8 mm (3.1 in)
1937	44.5 mm (1.8 in)
1938	65.8 mm (2.6 in)
1939	63.5 mm (2.5 in)
1940	54.9 mm (2.2 in)
1941	72.9 mm (2.9 in)
1942	47.8 mm (1.9 in)
1943	52.3 mm (2.1 in)
1944	59.9 mm (2.4 in)
1945	51.8 mm (2.0 in)
1946	59.9 mm (2.4 in)
1947	47.0 mm (1.9 in)
1948	47.0 mm (1.9 in)
1949	90.9 mm (3.6 in)
1950	57.9 mm (2.3 in)
1951	63.0 mm (2.5 in)
1952	79.8 mm (3.1 in)
1953	52.8 mm (2.1 in)
1954	53.8 mm (2.1 in)
1955	57.9 mm (2.3 in)
1956	40.4 mm (1.6 in)
1957	67.3 mm (2.6 in)
1958	61.0 mm (2.4 in)
1959	27.9 mm (1.1 in)
1960	11.9 mm (0.5 in)
1961	19.8 mm (0.8 in)
1962	79.8 mm (3.1 in)
1963	59.9 mm (2.4 in)
1964	45.0 mm (1.8 in)
1965	37.8 mm (1.5 in)
1966	44.2 mm (1.7 in)
1967	62.0 mm (2.4 in)
1968	39.9 mm (1.6 in)
1969	2.8 mm (0.11 in)
1972	19.3 mm (0.8 in)
1973	8.4 mm (0.33 in)
1974	27.2 mm (1.1 in)
1975	40.4 mm (1.6 in)
1978	47.0 mm (1.9 in)
1979	11.9 mm (0.5 in)
1989	1.0 mm (0.04 in)
1990	39.4 mm (1.6 in)
1991	82.3 mm (3.2 in)
1992	80.5 mm (3.2 in)
1993	n/a

Wettest five days (Rx5day)

The wettest five days of the year at Chiautla de Tapia, 1927 to 1993. The record is 257.6 mm (10.1 in) in 1992, marked on the chart; the median year is 106.8 mm (4.2 in).

Wettest five days (Rx5day) at Chiautla de Tapia by year
Year	Wettest five days (Rx5day)
1927	74.7 mm (2.9 in)
1928	123.5 mm (4.9 in)
1929	110.5 mm (4.4 in)
1930	89.2 mm (3.5 in)
1931	137.1 mm (5.4 in)
1932	63.6 mm (2.5 in)
1933	106.8 mm (4.2 in)
1934	226.1 mm (8.9 in)
1935	139.4 mm (5.5 in)
1936	132.6 mm (5.2 in)
1937	137.6 mm (5.4 in)
1938	124.2 mm (4.9 in)
1939	119.1 mm (4.7 in)
1940	70.6 mm (2.8 in)
1941	122.9 mm (4.8 in)
1942	148.1 mm (5.8 in)
1943	187.9 mm (7.4 in)
1944	105.7 mm (4.2 in)
1945	101.3 mm (4.0 in)
1946	88.6 mm (3.5 in)
1947	87.6 mm (3.4 in)
1948	116.4 mm (4.6 in)
1949	174.9 mm (6.9 in)
1950	137.9 mm (5.4 in)
1951	76.5 mm (3.0 in)
1952	129.6 mm (5.1 in)
1953	115.3 mm (4.5 in)
1954	139.3 mm (5.5 in)
1955	138.5 mm (5.5 in)
1956	108.0 mm (4.3 in)
1957	94.5 mm (3.7 in)
1958	75.0 mm (3.0 in)
1959	47.7 mm (1.9 in)
1960	27.7 mm (1.1 in)
1961	72.9 mm (2.9 in)
1962	203.0 mm (8.0 in)
1963	102.4 mm (4.0 in)
1964	113.9 mm (4.5 in)
1965	76.4 mm (3.0 in)
1966	116.1 mm (4.6 in)
1967	254.7 mm (10.0 in)
1968	75.4 mm (3.0 in)
1969	2.8 mm (0.11 in)
1972	47.0 mm (1.9 in)
1973	20.3 mm (0.8 in)
1974	42.4 mm (1.7 in)
1975	60.2 mm (2.4 in)
1978	79.8 mm (3.1 in)
1979	32.7 mm (1.3 in)
1989	1.3 mm (0.05 in)
1990	86.2 mm (3.4 in)
1991	248.9 mm (9.8 in)
1992	257.6 mm (10.1 in)
1993	n/a

Longest dry spell (CDD)

The longest dry spell of the year at Chiautla de Tapia, 1927 to 1993. The record is 153 days in 1961, marked on the chart; the median year is 71 days.

Longest dry spell (CDD) at Chiautla de Tapia by year
Year	Longest dry spell (CDD)
1927	29 days
1928	115 days
1929	131 days
1930	83 days
1931	82 days
1932	59 days
1933	58 days
1934	65 days
1935	33 days
1936	69 days
1937	63 days
1938	44 days
1939	58 days
1940	72 days
1941	32 days
1942	58 days
1943	92 days
1944	128 days
1945	128 days
1946	58 days
1947	58 days
1948	87 days
1949	95 days
1950	128 days
1951	122 days
1952	93 days
1953	140 days
1954	100 days
1955	85 days
1956	57 days
1957	71 days
1958	49 days
1959	108 days
1960	146 days
1961	153 days
1962	76 days
1963	131 days
1964	60 days
1965	73 days
1966	90 days
1967	88 days
1968	47 days
1969	27 days
1972	22 days
1973	12 days
1974	29 days
1975	6 days
1978	51 days
1979	18 days
1989	59 days
1990	82 days
1991	59 days
1992	93 days
1993	n/a

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

39 years, 1928 to 1990

A day with at least 58.8 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 99.9 mm (3.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Chiautla de Tapia: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	58.8 mm (2.3 in)
5 years	75.4 mm (3.0 in)
10 years	83.6 mm (3.3 in)
25 years	91.6 mm (3.6 in)
50 years	96.2 mm (3.8 in)	Longer than the 39 years of record
100 years	99.9 mm (3.9 in)	Longer than the 39 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, 39 years of values from 1928 to 1990.

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: 96.8 mm (3.8 in) in 1934; 95.0 mm (3.7 in) in 1928; 90.9 mm (3.6 in) in 1949.

Download the Data

Data for Chiautla de Tapia standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Chiautla de Tapia 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 2026-10-15 (15 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).