Iguala (Smn) Weather Records (MXN00012047)

Record envelope, standing records and threshold days for Iguala (Smn) (MXN00012047), Mexico, with 86 years of record.

Key Facts for Iguala (Smn)

Iguala (Smn) (MXN00012047) is a weather station in Mexico at 18.33 latitude and -99.53 longitude, 738 m (2,421 ft) above sea level.
The station reports from 1922 to 2007, 86 years of record.
1,464 records set at Iguala (Smn) still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Iguala (Smn) set a daily record low maximum temperature of 25.6 C (78.1 F) on 25 October 2007.

About the Station

Location: Mexico, 18.33 latitude, -99.53 longitude.
Elevation: 738 m (2,421 ft).
Period of record: 1922 to 2007, 86 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 Iguala (Smn). 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 Iguala (Smn), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	40.0 C (104.0 F)	5.6 C (42.1 F)	n/a	n/a
Feb	43.9 C (111.0 F)	8.9 C (48.0 F)	n/a	n/a
Mar	42.8 C (109.0 F)	10.6 C (51.1 F)	n/a	n/a
Apr	42.8 C (109.0 F)	13.3 C (55.9 F)	n/a	n/a
May	42.8 C (109.0 F)	13.9 C (57.0 F)	n/a	n/a
Jun	45.0 C (113.0 F)	12.2 C (54.0 F)	n/a	n/a
Jul	38.9 C (102.0 F)	15.6 C (60.1 F)	n/a	n/a
Aug	38.9 C (102.0 F)	13.9 C (57.0 F)	n/a	n/a
Sep	38.9 C (102.0 F)	15.0 C (59.0 F)	n/a	n/a
Oct	38.9 C (102.0 F)	10.0 C (50.0 F)	n/a	n/a
Nov	37.8 C (100.0 F)	8.3 C (46.9 F)	n/a	n/a
Dec	38.9 C (102.0 F)	6.1 C (43.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Iguala (Smn) still stand. 1969 holds the most, with 95.

Standing records at Iguala (Smn) by the year they were set
Year set	Standing records
1922	30
1923	17
1924	6
1925	12
1926	9
1927	14
1928	22
1929	14
1930	15
1931	13
1932	33
1933	8
1934	10
1935	8
1936	32
1937	69
1938	15
1939	14
1940	36
1941	27
1942	34
1943	18
1944	13
1945	10
1949	21
1950	25
1951	25
1952	34
1953	22
1954	24
1955	22
1956	35
1957	12
1958	25
1959	13
1960	10
1961	10
1962	15
1963	2
1964	7
1965	17
1966	22
1967	27
1968	18
1969	95
1970	60
1971	8
1972	1
1973	13
1974	2
1975	2
1976	14
1977	4
1978	10
1979	9
1980	12
1981	3
1982	14
1983	27
1984	9
1985	4
1986	22
1987	26
1988	16
1989	7
1990	19
1991	11
1992	23
1993	7
1994	4
1995	47
1996	18
1997	8
1998	7
1999	6
2000	5
2001	20
2002	20
2003	10
2004	6
2005	21
2006	7
2007	2

All-Time Record Progression

4 new records

4 all-time records were set at Iguala (Smn) between 18 January 1958 and 4 September 1988. Each dot is a new record.

When Iguala (Smn) set new all-time records
Date	Kind	Detail
1958-01-18	Record low maximum temperature	Record low maximum temperature 19.4 C (66.9 F)
1967-01-10	Record low maximum temperature	Record low maximum temperature 17.2 C (63.0 F)
1983-06-01	Record high maximum temperature	Record high maximum temperature 45.0 C (113.0 F)
1988-09-04	Record daily precipitation	Record daily precipitation 102.6 mm (4.0 in)

Wettest Day of Each Month

Sep: 102.6 mm (4.0 in)

The wettest day on record for each calendar month at Iguala (Smn). The most was 102.6 mm (4.0 in) on 4 September 1988.

Record daily precipitation for each month at Iguala (Smn)
Month	Record daily precipitation (mm)	Date
Jan	40.9 mm (1.6 in)	10 January 1967
Feb	11.9 mm (0.5 in)	20 February 1990
Mar	27.2 mm (1.1 in)	12 March 1985
Apr	30.0 mm (1.2 in)	9 April 1997
May	53.8 mm (2.1 in)	17 May 1942
Jun	79.8 mm (3.1 in)	29 June 1964
Jul	89.9 mm (3.5 in)	25 July 1939
Aug	87.4 mm (3.4 in)	20 August 1927
Sep	102.6 mm (4.0 in)	4 September 1988
Oct	82.3 mm (3.2 in)	12 October 1925
Nov	83.8 mm (3.3 in)	20 November 1922
Dec	48.8 mm (1.9 in)	2 December 1986

Period of Record Coverage

1922 to 2007

83 years of record at Iguala (Smn), 1922 to 2007. 8 years have data for under 90 percent of days and are left out of rankings: 1943, 1944, 1945, 1949, 1972, 1976, 1983, 2007.

Days with data per year at Iguala (Smn)
Year	Days with data	Share of year	Complete
1922	365	100%	Yes
1923	365	100%	Yes
1924	366	100%	Yes
1925	365	100%	Yes
1926	365	100%	Yes
1927	365	100%	Yes
1928	366	100%	Yes
1929	365	100%	Yes
1930	365	100%	Yes
1931	365	100%	Yes
1932	366	100%	Yes
1933	365	100%	Yes
1934	365	100%	Yes
1935	365	100%	Yes
1936	358	98%	Yes
1937	363	99%	Yes
1938	365	100%	Yes
1939	365	100%	Yes
1940	366	100%	Yes
1941	365	100%	Yes
1942	364	100%	Yes
1943	303	83%	No
1944	306	84%	No
1945	242	66%	No
1949	245	67%	No
1950	365	100%	Yes
1951	364	100%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	364	100%	Yes
1955	364	100%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	363	99%	Yes
1959	364	100%	Yes
1960	366	100%	Yes
1961	358	98%	Yes
1962	359	98%	Yes
1963	360	99%	Yes
1964	361	99%	Yes
1965	357	98%	Yes
1966	359	98%	Yes
1967	330	90%	Yes
1968	357	98%	Yes
1969	364	100%	Yes
1970	334	92%	Yes
1971	333	91%	Yes
1972	91	25%	No
1973	363	99%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	273	75%	No
1977	360	99%	Yes
1978	359	98%	Yes
1979	359	98%	Yes
1980	361	99%	Yes
1981	357	98%	Yes
1982	332	91%	Yes
1983	270	74%	No
1984	366	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	364	100%	Yes
1988	365	100%	Yes
1989	365	100%	Yes
1990	365	100%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	364	100%	Yes
1996	366	100%	Yes
1997	351	96%	Yes
1998	329	90%	Yes
1999	337	92%	Yes
2000	366	100%	Yes
2001	365	100%	Yes
2002	365	100%	Yes
2003	365	100%	Yes
2004	366	100%	Yes
2005	334	92%	Yes
2006	365	100%	Yes
2007	328	90%	No

Latest Records

Latest records at Iguala (Smn)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
25 October 2007	Iguala (Smn), MX	daily low max	25.6 C (78.1 F)	1.1 C (2.0 F)	41 years	24 of 100 (Routine)
21 October 2007	Iguala (Smn), MX	daily rain	68.6 mm (2.7 in)	17.8 mm (0.7 in)	16 years	26 of 100 (Routine)
29 September 2007	Iguala (Smn), MX	daily rain	36.1 mm (1.4 in)	2.8 mm (0.11 in)	8 years	12 of 100 (Routine)
7 September 2007	Iguala (Smn), MX	daily rain	76.5 mm (3.0 in)	13.5 mm (0.5 in)	62 years	36 of 100 (Notable)
26 August 2007	Iguala (Smn), MX	daily low min	15.6 C (60.1 F)	1.1 C (2.0 F)	56 years	33 of 100 (Routine)
7 August 2007	Iguala (Smn), MX	daily rain	38.1 mm (1.5 in)	6.3 mm (0.25 in)	68 years	33 of 100 (Routine)
7 August 2007	Iguala (Smn), MX	daily high max (Tie)	37.8 C (100.0 F)	tie	13 years	3 of 100 (Routine)
21 July 2007	Iguala (Smn), MX	daily low min (Tie)	17.8 C (64.0 F)	tie	68 years	7 of 100 (Routine)
16 June 2007	Iguala (Smn), MX	daily low min (Tie)	18.9 C (66.0 F)	tie	52 years	5 of 100 (Routine)
7 May 2007	Iguala (Smn), MX	daily high min (Tie)	25.0 C (77.0 F)	tie	36 years	4 of 100 (Routine)
23 April 2007	Iguala (Smn), MX	daily high min (Tie)	25.0 C (77.0 F)	tie	16 years	3 of 100 (Routine)
1 April 2007	Iguala (Smn), MX	daily high min (Tie)	23.9 C (75.0 F)	tie	36 years	4 of 100 (Routine)
31 March 2007	Iguala (Smn), MX	daily high min (Tie)	23.9 C (75.0 F)	tie	36 years	4 of 100 (Routine)
24 November 2006	Iguala (Smn), MX	daily low max	23.3 C (73.9 F)	1.7 C (3.1 F)	9 years	17 of 100 (Routine)
23 November 2006	Iguala (Smn), MX	daily low max (Tie)	26.7 C (80.1 F)	tie	11 years	2 of 100 (Routine)
14 November 2006	Iguala (Smn), MX	daily rain	9.4 mm (0.37 in)	8.9 mm (0.35 in)	44 years	20 of 100 (Routine)
13 November 2006	Iguala (Smn), MX	daily rain	7.9 mm (0.31 in)	3.8 mm (0.15 in)	41 years	20 of 100 (Routine)
27 October 2006	Iguala (Smn), MX	daily rain	16.5 mm (0.6 in)	8.1 mm (0.32 in)	36 years	20 of 100 (Routine)
7 October 2006	Iguala (Smn), MX	daily rain	36.6 mm (1.4 in)	15.8 mm (0.6 in)	64 years	39 of 100 (Notable)
20 September 2006	Iguala (Smn), MX	daily low min (Tie)	17.8 C (64.0 F)	tie	56 years	6 of 100 (Routine)

Climate Trend

67 complete years, 1922 to 2004

One stripe for each of 67 complete years at Iguala (Smn), 1922 to 2004. Blue stripes are years cooler than the station's own mean of 26.3 C (79.4 F); red stripes are warmer. The coolest year was 1950, at 24.5 C (76.1 F), and the warmest was 1930, at 27.5 C (81.5 F). The strongest colour marks a difference of 1.9 C (3.4 F).

Annual mean temperature at Iguala (Smn) as warming stripes, 1922 to 2004
Year	Annual mean temperature	Difference from the station mean
1922	26.9 C	+0.58 C
1923	26.7 C	+0.34 C
1924	26.6 C	+0.30 C
1925	26.7 C	+0.34 C
1926	26.7 C	+0.39 C
1927	26.9 C	+0.57 C
1928	27.5 C	+1.15 C
1929	27.4 C	+1.07 C
1930	27.5 C	+1.18 C
1931	27.2 C	+0.86 C
1932	27.4 C	+1.08 C
1933	26.9 C	+0.55 C
1934	26.6 C	+0.26 C
1935	26.6 C	+0.31 C
1936	27.3 C	+0.96 C
1937	26.9 C	+0.57 C
1938	26.3 C	0.00 C
1939	26.0 C	-0.28 C
1940	27.0 C	+0.69 C
1941	26.8 C	+0.52 C
1942	26.6 C	+0.29 C
1950	24.5 C	-1.83 C
1951	24.9 C	-1.44 C
1952	24.6 C	-1.75 C
1953	25.0 C	-1.34 C
1954	24.6 C	-1.72 C
1955	24.7 C	-1.64 C
1956	24.7 C	-1.64 C
1957	25.8 C	-0.54 C
1958	25.4 C	-0.89 C
1959	25.7 C	-0.59 C
1960	25.9 C	-0.43 C
1961	26.7 C	+0.36 C
1962	26.9 C	+0.56 C
1963	26.1 C	-0.20 C
1964	25.6 C	-0.74 C
1965	25.1 C	-1.18 C
1966	24.6 C	-1.69 C
1968	25.1 C	-1.24 C
1969	27.4 C	+1.11 C
1973	26.1 C	-0.27 C
1974	26.7 C	+0.35 C
1975	26.6 C	+0.23 C
1977	26.8 C	+0.50 C
1978	26.9 C	+0.58 C
1979	26.8 C	+0.50 C
1980	26.5 C	+0.16 C
1984	26.9 C	+0.61 C
1985	26.3 C	-0.03 C
1986	27.0 C	+0.69 C
1987	26.9 C	+0.54 C
1988	26.9 C	+0.55 C
1989	26.4 C	+0.03 C
1990	26.6 C	+0.29 C
1991	26.8 C	+0.50 C
1992	26.2 C	-0.08 C
1993	26.9 C	+0.56 C
1994	27.2 C	+0.86 C
1995	26.0 C	-0.37 C
1996	26.3 C	+0.02 C
1997	26.8 C	+0.49 C
1998	26.0 C	-0.28 C
2000	25.9 C	-0.46 C
2001	25.6 C	-0.77 C
2002	26.3 C	+0.02 C
2003	26.5 C	+0.14 C
2004	26.3 C	-0.05 C

The fitted trend in annual mean temperature here over 1922 to 2004 is -0.04 C (-0.11 to 0.04) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.2 to 0.1) per decade. The slope is a straight line fitted to 67 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Iguala (Smn)
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.04 C (-0.11 to 0.04) per decade	-0.1 F (-0.2 to 0.1) per decade	1922 to 2004	67	Not clearly different from zero
Mean daily maximum	-0.2 C (-0.3 to -0.1) per decade	-0.4 F (-0.6 to -0.2) per decade	1922 to 2004	67	Fall
Mean daily minimum	0.1 C (0.1 to 0.2) per decade	0.3 F (0.1 to 0.4) per decade	1922 to 2004	67	Rise

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

1922 to 2007

Yearly extremes at Iguala (Smn): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	45.0 C (113.0 F)	1983	40.0 C (104.0 F)	83
Coldest night (TNn)	5.6 C (42.1 F)	1953	10.6 C (51.1 F)	83
Wettest day (Rx1day)	102.6 mm (4.0 in)	1988	56.9 mm (2.2 in)	83
Wettest five days (Rx5day)	200.4 mm (7.9 in)	1922	116.3 mm (4.6 in)	83
Longest dry spell (CDD)	141 days	1933	82 days	83

Hottest day (TXx)

The hottest day of the year at Iguala (Smn), 1922 to 2007. The record is 45.0 C (113.0 F) in 1983, marked on the chart; the median year is 40.0 C (104.0 F).

Hottest day (TXx) at Iguala (Smn) by year
Year	Hottest day (TXx)
1922	40.6 C (105.1 F)
1923	41.7 C (107.1 F)
1924	40.6 C (105.1 F)
1925	40.6 C (105.1 F)
1926	40.0 C (104.0 F)
1927	40.0 C (104.0 F)
1928	40.0 C (104.0 F)
1929	40.6 C (105.1 F)
1930	38.9 C (102.0 F)
1931	38.9 C (102.0 F)
1932	42.8 C (109.0 F)
1933	41.1 C (106.0 F)
1934	40.0 C (104.0 F)
1935	40.0 C (104.0 F)
1936	40.6 C (105.1 F)
1937	43.9 C (111.0 F)
1938	40.6 C (105.1 F)
1939	40.6 C (105.1 F)
1940	41.7 C (107.1 F)
1941	41.7 C (107.1 F)
1942	42.8 C (109.0 F)
1943	42.8 C (109.0 F)
1944	41.7 C (107.1 F)
1945	42.8 C (109.0 F)
1949	38.9 C (102.0 F)
1950	37.8 C (100.0 F)
1951	37.8 C (100.0 F)
1952	37.8 C (100.0 F)
1953	37.8 C (100.0 F)
1954	38.9 C (102.0 F)
1955	38.9 C (102.0 F)
1956	37.8 C (100.0 F)
1957	42.8 C (109.0 F)
1958	39.4 C (102.9 F)
1959	39.4 C (102.9 F)
1960	39.4 C (102.9 F)
1961	40.0 C (104.0 F)
1962	40.0 C (104.0 F)
1963	40.0 C (104.0 F)
1964	38.3 C (100.9 F)
1965	38.3 C (100.9 F)
1966	38.9 C (102.0 F)
1967	38.9 C (102.0 F)
1968	38.9 C (102.0 F)
1969	39.4 C (102.9 F)
1970	37.2 C (99.0 F)
1971	38.9 C (102.0 F)
1972	37.8 C (100.0 F)
1973	37.8 C (100.0 F)
1974	39.4 C (102.9 F)
1975	37.8 C (100.0 F)
1976	40.0 C (104.0 F)
1977	40.0 C (104.0 F)
1978	41.7 C (107.1 F)
1979	41.7 C (107.1 F)
1980	40.0 C (104.0 F)
1981	40.0 C (104.0 F)
1982	40.0 C (104.0 F)
1983	45.0 C (113.0 F)
1984	42.8 C (109.0 F)
1985	40.0 C (104.0 F)
1986	41.7 C (107.1 F)
1987	41.1 C (106.0 F)
1988	40.6 C (105.1 F)
1989	40.0 C (104.0 F)
1990	40.6 C (105.1 F)
1991	40.6 C (105.1 F)
1992	40.0 C (104.0 F)
1993	42.8 C (109.0 F)
1994	41.7 C (107.1 F)
1995	38.3 C (100.9 F)
1996	41.1 C (106.0 F)
1997	41.1 C (106.0 F)
1998	40.0 C (104.0 F)
1999	40.0 C (104.0 F)
2000	40.0 C (104.0 F)
2001	40.0 C (104.0 F)
2002	40.0 C (104.0 F)
2003	42.8 C (109.0 F)
2004	42.2 C (108.0 F)
2005	41.7 C (107.1 F)
2006	40.6 C (105.1 F)
2007	41.1 C (106.0 F)

Coldest night (TNn)

The coldest night of the year at Iguala (Smn), 1922 to 2007. The record is 5.6 C (42.1 F) in 1953, marked on the chart; the median year is 10.6 C (51.1 F).

Coldest night (TNn) at Iguala (Smn) by year
Year	Coldest night (TNn)
1922	10.6 C (51.1 F)
1923	12.8 C (55.0 F)
1924	10.6 C (51.1 F)
1925	8.9 C (48.0 F)
1926	8.9 C (48.0 F)
1927	8.9 C (48.0 F)
1928	10.6 C (51.1 F)
1929	10.6 C (51.1 F)
1930	10.6 C (51.1 F)
1931	10.6 C (51.1 F)
1932	10.0 C (50.0 F)
1933	10.0 C (50.0 F)
1934	10.0 C (50.0 F)
1935	9.4 C (48.9 F)
1936	8.9 C (48.0 F)
1937	8.9 C (48.0 F)
1938	6.7 C (44.1 F)
1939	8.3 C (46.9 F)
1940	7.8 C (46.0 F)
1941	8.9 C (48.0 F)
1942	6.7 C (44.1 F)
1943	6.1 C (43.0 F)
1944	7.8 C (46.0 F)
1945	12.8 C (55.0 F)
1949	10.0 C (50.0 F)
1950	7.8 C (46.0 F)
1951	10.0 C (50.0 F)
1952	10.6 C (51.1 F)
1953	5.6 C (42.1 F)
1954	7.8 C (46.0 F)
1955	7.8 C (46.0 F)
1956	5.6 C (42.1 F)
1957	10.0 C (50.0 F)
1958	10.6 C (51.1 F)
1959	11.7 C (53.1 F)
1960	10.6 C (51.1 F)
1961	8.3 C (46.9 F)
1962	10.6 C (51.1 F)
1963	10.6 C (51.1 F)
1964	11.1 C (52.0 F)
1965	10.6 C (51.1 F)
1966	11.1 C (52.0 F)
1967	7.2 C (45.0 F)
1968	11.7 C (53.1 F)
1969	8.9 C (48.0 F)
1970	11.1 C (52.0 F)
1971	11.1 C (52.0 F)
1972	11.7 C (53.1 F)
1973	11.7 C (53.1 F)
1974	12.8 C (55.0 F)
1975	12.8 C (55.0 F)
1976	11.7 C (53.1 F)
1977	11.7 C (53.1 F)
1978	13.9 C (57.0 F)
1979	12.8 C (55.0 F)
1980	11.7 C (53.1 F)
1981	11.7 C (53.1 F)
1982	10.0 C (50.0 F)
1983	10.6 C (51.1 F)
1984	10.0 C (50.0 F)
1985	10.0 C (50.0 F)
1986	7.8 C (46.0 F)
1987	10.0 C (50.0 F)
1988	10.6 C (51.1 F)
1989	11.7 C (53.1 F)
1990	13.9 C (57.0 F)
1991	13.9 C (57.0 F)
1992	10.0 C (50.0 F)
1993	11.7 C (53.1 F)
1994	11.7 C (53.1 F)
1995	11.1 C (52.0 F)
1996	10.0 C (50.0 F)
1997	8.9 C (48.0 F)
1998	8.9 C (48.0 F)
1999	10.6 C (51.1 F)
2000	12.2 C (54.0 F)
2001	12.2 C (54.0 F)
2002	8.9 C (48.0 F)
2003	10.6 C (51.1 F)
2004	10.6 C (51.1 F)
2005	12.8 C (55.0 F)
2006	10.0 C (50.0 F)
2007	12.8 C (55.0 F)

Wettest day (Rx1day)

The wettest day of the year at Iguala (Smn), 1922 to 2007. The record is 102.6 mm (4.0 in) in 1988, marked on the chart; the median year is 56.9 mm (2.2 in).

Wettest day (Rx1day) at Iguala (Smn) by year
Year	Wettest day (Rx1day)
1922	83.8 mm (3.3 in)
1923	56.9 mm (2.2 in)
1924	69.1 mm (2.7 in)
1925	82.3 mm (3.2 in)
1926	62.5 mm (2.5 in)
1927	87.4 mm (3.4 in)
1928	67.8 mm (2.7 in)
1929	57.9 mm (2.3 in)
1930	47.0 mm (1.9 in)
1931	75.9 mm (3.0 in)
1932	64.8 mm (2.6 in)
1933	62.0 mm (2.4 in)
1934	67.6 mm (2.7 in)
1935	54.9 mm (2.2 in)
1936	42.9 mm (1.7 in)
1937	47.8 mm (1.9 in)
1938	62.0 mm (2.4 in)
1939	89.9 mm (3.5 in)
1940	50.8 mm (2.0 in)
1941	86.9 mm (3.4 in)
1942	68.8 mm (2.7 in)
1943	35.8 mm (1.4 in)
1944	63.0 mm (2.5 in)
1945	34.8 mm (1.4 in)
1949	74.9 mm (2.9 in)
1950	51.8 mm (2.0 in)
1951	47.0 mm (1.9 in)
1952	49.8 mm (2.0 in)
1953	61.0 mm (2.4 in)
1954	74.4 mm (2.9 in)
1955	65.3 mm (2.6 in)
1956	65.5 mm (2.6 in)
1957	57.7 mm (2.3 in)
1958	65.5 mm (2.6 in)
1959	48.0 mm (1.9 in)
1960	47.5 mm (1.9 in)
1961	53.6 mm (2.1 in)
1962	59.2 mm (2.3 in)
1963	48.5 mm (1.9 in)
1964	79.8 mm (3.1 in)
1965	56.6 mm (2.2 in)
1966	71.6 mm (2.8 in)
1967	64.3 mm (2.5 in)
1968	55.1 mm (2.2 in)
1969	34.3 mm (1.4 in)
1970	23.9 mm (0.9 in)
1971	30.0 mm (1.2 in)
1972	9.1 mm (0.36 in)
1973	30.0 mm (1.2 in)
1974	23.6 mm (0.9 in)
1975	26.7 mm (1.1 in)
1976	41.7 mm (1.6 in)
1977	39.1 mm (1.5 in)
1978	46.2 mm (1.8 in)
1979	52.3 mm (2.1 in)
1980	54.1 mm (2.1 in)
1981	49.8 mm (2.0 in)
1982	64.0 mm (2.5 in)
1983	41.7 mm (1.6 in)
1984	59.9 mm (2.4 in)
1985	51.8 mm (2.0 in)
1986	48.8 mm (1.9 in)
1987	70.6 mm (2.8 in)
1988	102.6 mm (4.0 in)
1989	32.0 mm (1.3 in)
1990	50.8 mm (2.0 in)
1991	81.8 mm (3.2 in)
1992	40.1 mm (1.6 in)
1993	81.3 mm (3.2 in)
1994	55.4 mm (2.2 in)
1995	40.9 mm (1.6 in)
1996	35.6 mm (1.4 in)
1997	43.9 mm (1.7 in)
1998	75.7 mm (3.0 in)
1999	62.0 mm (2.4 in)
2000	63.0 mm (2.5 in)
2001	47.8 mm (1.9 in)
2002	71.9 mm (2.8 in)
2003	68.6 mm (2.7 in)
2004	56.9 mm (2.2 in)
2005	66.5 mm (2.6 in)
2006	49.8 mm (2.0 in)
2007	76.5 mm (3.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Iguala (Smn), 1922 to 2007. The record is 200.4 mm (7.9 in) in 1922, marked on the chart; the median year is 116.3 mm (4.6 in).

Wettest five days (Rx5day) at Iguala (Smn) by year
Year	Wettest five days (Rx5day)
1922	200.4 mm (7.9 in)
1923	103.9 mm (4.1 in)
1924	118.6 mm (4.7 in)
1925	145.1 mm (5.7 in)
1926	160.6 mm (6.3 in)
1927	164.9 mm (6.5 in)
1928	183.0 mm (7.2 in)
1929	136.4 mm (5.4 in)
1930	112.1 mm (4.4 in)
1931	158.4 mm (6.2 in)
1932	100.4 mm (4.0 in)
1933	122.4 mm (4.8 in)
1934	124.7 mm (4.9 in)
1935	130.2 mm (5.1 in)
1936	99.0 mm (3.9 in)
1937	159.3 mm (6.3 in)
1938	126.2 mm (5.0 in)
1939	166.9 mm (6.6 in)
1940	135.4 mm (5.3 in)
1941	152.2 mm (6.0 in)
1942	116.6 mm (4.6 in)
1943	77.5 mm (3.1 in)
1944	82.6 mm (3.3 in)
1945	104.1 mm (4.1 in)
1949	159.5 mm (6.3 in)
1950	131.4 mm (5.2 in)
1951	84.7 mm (3.3 in)
1952	107.3 mm (4.2 in)
1953	97.4 mm (3.8 in)
1954	109.8 mm (4.3 in)
1955	126.5 mm (5.0 in)
1956	130.3 mm (5.1 in)
1957	151.1 mm (5.9 in)
1958	126.7 mm (5.0 in)
1959	116.6 mm (4.6 in)
1960	69.3 mm (2.7 in)
1961	168.4 mm (6.6 in)
1962	99.4 mm (3.9 in)
1963	118.6 mm (4.7 in)
1964	107.8 mm (4.2 in)
1965	106.9 mm (4.2 in)
1966	184.9 mm (7.3 in)
1967	103.4 mm (4.1 in)
1968	121.4 mm (4.8 in)
1969	88.6 mm (3.5 in)
1970	89.7 mm (3.5 in)
1971	78.9 mm (3.1 in)
1972	9.1 mm (0.36 in)
1973	66.0 mm (2.6 in)
1974	91.2 mm (3.6 in)
1975	68.0 mm (2.7 in)
1976	82.6 mm (3.3 in)
1977	77.1 mm (3.0 in)
1978	118.4 mm (4.7 in)
1979	106.2 mm (4.2 in)
1980	150.4 mm (5.9 in)
1981	116.3 mm (4.6 in)
1982	86.1 mm (3.4 in)
1983	80.3 mm (3.2 in)
1984	120.6 mm (4.7 in)
1985	178.8 mm (7.0 in)
1986	79.4 mm (3.1 in)
1987	106.8 mm (4.2 in)
1988	139.8 mm (5.5 in)
1989	70.1 mm (2.8 in)
1990	73.7 mm (2.9 in)
1991	127.0 mm (5.0 in)
1992	98.3 mm (3.9 in)
1993	116.4 mm (4.6 in)
1994	91.0 mm (3.6 in)
1995	81.1 mm (3.2 in)
1996	85.1 mm (3.4 in)
1997	131.1 mm (5.2 in)
1998	104.2 mm (4.1 in)
1999	131.2 mm (5.2 in)
2000	120.9 mm (4.8 in)
2001	107.4 mm (4.2 in)
2002	111.5 mm (4.4 in)
2003	130.3 mm (5.1 in)
2004	111.3 mm (4.4 in)
2005	121.4 mm (4.8 in)
2006	100.0 mm (3.9 in)
2007	176.4 mm (6.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Iguala (Smn), 1922 to 2007. The record is 141 days in 1933, marked on the chart; the median year is 82 days.

Longest dry spell (CDD) at Iguala (Smn) by year
Year	Longest dry spell (CDD)
1922	78 days
1923	82 days
1924	109 days
1925	65 days
1926	108 days
1927	74 days
1928	47 days
1929	123 days
1930	55 days
1931	107 days
1932	132 days
1933	141 days
1934	53 days
1935	127 days
1936	105 days
1937	67 days
1938	60 days
1939	121 days
1940	73 days
1941	43 days
1942	85 days
1943	79 days
1944	91 days
1945	47 days
1949	81 days
1950	87 days
1951	77 days
1952	65 days
1953	141 days
1954	54 days
1955	121 days
1956	74 days
1957	125 days
1958	82 days
1959	100 days
1960	123 days
1961	60 days
1962	105 days
1963	78 days
1964	83 days
1965	66 days
1966	68 days
1967	85 days
1968	93 days
1969	76 days
1970	99 days
1971	63 days
1972	71 days
1973	94 days
1974	70 days
1975	107 days
1976	91 days
1977	113 days
1978	74 days
1979	54 days
1980	57 days
1981	66 days
1982	57 days
1983	52 days
1984	117 days
1985	70 days
1986	72 days
1987	117 days
1988	81 days
1989	115 days
1990	48 days
1991	128 days
1992	69 days
1993	63 days
1994	108 days
1995	118 days
1996	114 days
1997	98 days
1998	120 days
1999	51 days
2000	78 days
2001	54 days
2002	83 days
2003	60 days
2004	100 days
2005	140 days
2006	90 days
2007	105 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

78 years, 1922 to 2007

A day with at least 57.2 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 96.1 mm (3.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Iguala (Smn): the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	57.2 mm (2.3 in)
5 years	71.7 mm (2.8 in)
10 years	79.3 mm (3.1 in)
25 years	87.2 mm (3.4 in)
50 years	92.0 mm (3.6 in)
100 years	96.1 mm (3.8 in)	Longer than the 78 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, 78 years of values from 1922 to 2007.

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: 102.6 mm (4.0 in) in 1988; 89.9 mm (3.5 in) in 1939; 87.4 mm (3.4 in) in 1927.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Iguala (Smn), at 1964. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1964 ran 0.7 C (1.3 F) lower than in the years before (likely change).

Suspected changes in the annual mean temperature at Iguala (Smn), against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1964	-0.7	-1.3	likely	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Download the Data

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