Nanchital (Smn) Weather Records (MXN00030113)

Record envelope, standing records and threshold days for Nanchital (Smn) (MXN00030113), Mexico, with 45 years of record.

Key Facts for Nanchital (Smn)

Nanchital (Smn) (MXN00030113) is a weather station in Mexico at 18.07 latitude and -94.42 longitude, 20 m (65 ft) above sea level.
The station reports from 1939 to 1983, 45 years of record.
1,464 records set at Nanchital (Smn) still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Nanchital (Smn) set a daily record precipitation of 66.5 mm (2.6 in) on 30 December 1983.

About the Station

Location: Mexico, 18.07 latitude, -94.42 longitude.
Elevation: 20 m (65 ft).
Period of record: 1939 to 1983, 45 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 Nanchital (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 Nanchital (Smn), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	38.3 C (100.9 F)	9.4 C (48.9 F)	n/a	n/a
Feb	37.2 C (99.0 F)	10.0 C (50.0 F)	n/a	n/a
Mar	39.4 C (102.9 F)	10.0 C (50.0 F)	n/a	n/a
Apr	42.8 C (109.0 F)	12.8 C (55.0 F)	n/a	n/a
May	41.7 C (107.1 F)	15.6 C (60.1 F)	n/a	n/a
Jun	40.0 C (104.0 F)	17.8 C (64.0 F)	n/a	n/a
Jul	38.9 C (102.0 F)	18.9 C (66.0 F)	n/a	n/a
Aug	40.0 C (104.0 F)	17.8 C (64.0 F)	n/a	n/a
Sep	41.1 C (106.0 F)	18.9 C (66.0 F)	n/a	n/a
Oct	38.9 C (102.0 F)	15.0 C (59.0 F)	n/a	n/a
Nov	39.4 C (102.9 F)	12.8 C (55.0 F)	n/a	n/a
Dec	36.7 C (98.1 F)	10.0 C (50.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Nanchital (Smn) still stand. 1972 holds the most, with 111.

Standing records at Nanchital (Smn) by the year they were set
Year set	Standing records
1939	68
1940	82
1941	56
1943	61
1944	76
1945	85
1946	74
1947	69
1948	29
1960	7
1961	31
1962	37
1963	28
1964	27
1965	16
1966	22
1967	27
1968	38
1969	37
1970	31
1971	32
1972	111
1973	47
1974	32
1975	25
1976	27
1977	22
1978	62
1979	29
1980	43
1981	45
1982	24
1983	64

Wettest Day of Each Month

Sep: 301.0 mm (11.9 in)

The wettest day on record for each calendar month at Nanchital (Smn). The most was 301.0 mm (11.9 in) on 24 September 1966.

Record daily precipitation for each month at Nanchital (Smn)
Month	Record daily precipitation (mm)	Date
Jan	149.9 mm (5.9 in)	3 January 1943
Feb	184.9 mm (7.3 in)	4 February 1972
Mar	85.9 mm (3.4 in)	20 March 1965
Apr	122.9 mm (4.8 in)	20 April 1946
May	151.9 mm (6.0 in)	24 May 1947
Jun	127.5 mm (5.0 in)	22 June 1940
Jul	215.9 mm (8.5 in)	31 July 1983
Aug	195.8 mm (7.7 in)	19 August 1945
Sep	301.0 mm (11.9 in)	24 September 1966
Oct	234.4 mm (9.2 in)	14 October 1969
Nov	186.4 mm (7.3 in)	5 November 1946
Dec	168.9 mm (6.6 in)	20 December 1946

Period of Record Coverage

1939 to 1983

33 years of record at Nanchital (Smn), 1939 to 1983. 8 years have data for under 90 percent of days and are left out of rankings: 1939, 1948, 1960, 1965, 1966, 1970, 1980, 1981.

Days with data per year at Nanchital (Smn)
Year	Days with data	Share of year	Complete
1939	299	82%	No
1940	365	100%	Yes
1941	364	100%	Yes
1943	333	91%	Yes
1944	366	100%	Yes
1945	364	100%	Yes
1946	332	91%	Yes
1947	333	91%	Yes
1948	149	41%	No
1960	89	24%	No
1961	360	99%	Yes
1962	358	98%	Yes
1963	359	98%	Yes
1964	356	97%	Yes
1965	208	57%	No
1966	300	82%	No
1967	355	97%	Yes
1968	355	97%	Yes
1969	348	95%	Yes
1970	326	89%	No
1971	358	98%	Yes
1972	345	94%	Yes
1973	353	97%	Yes
1974	350	96%	Yes
1975	358	98%	Yes
1976	347	95%	Yes
1977	345	95%	Yes
1978	347	95%	Yes
1979	341	93%	Yes
1980	286	78%	No
1981	317	87%	No
1982	350	96%	Yes
1983	356	98%	Yes

Latest Records

Latest records at Nanchital (Smn)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 December 1983	Nanchital (Smn), MX	daily rain	66.5 mm (2.6 in)	48.2 mm (1.9 in)	14 years	26 of 100 (Routine)
30 December 1983	Nanchital (Smn), MX	daily low min	11.7 C (53.1 F)	0.5 C (0.9 F)	42 years	17 of 100 (Routine)
27 December 1983	Nanchital (Smn), MX	daily high min	25.0 C (77.0 F)	1.7 C (3.1 F)	1 year	10 of 100 (Routine)
2 December 1983	Nanchital (Smn), MX	daily high min	25.0 C (77.0 F)	2.2 C (4.0 F)	10 years	15 of 100 (Routine)
30 November 1983	Nanchital (Smn), MX	daily high min	21.7 C (71.1 F)	1.7 C (3.1 F)	40 years	23 of 100 (Routine)
30 November 1983	Nanchital (Smn), MX	daily high max (Tie)	25.6 C (78.1 F)	tie	42 years	4 of 100 (Routine)
28 November 1983	Nanchital (Smn), MX	daily high min	25.0 C (77.0 F)	2.2 C (4.0 F)	13 years	18 of 100 (Routine)
9 November 1983	Nanchital (Smn), MX	daily rain	108.0 mm (4.3 in)	22.1 mm (0.9 in)	5 years	14 of 100 (Routine)
23 October 1983	Nanchital (Smn), MX	daily high min (Tie)	22.8 C (73.0 F)	tie	14 years	2 of 100 (Routine)
14 October 1983	Nanchital (Smn), MX	daily low max (Tie)	25.0 C (77.0 F)	tie	5 years	1 of 100 (Routine)
13 October 1983	Nanchital (Smn), MX	daily low max	25.0 C (77.0 F)	1.7 C (3.1 F)	38 years	20 of 100 (Routine)
18 September 1983	Nanchital (Smn), MX	daily high max	38.9 C (102.0 F)	1.7 C (3.1 F)	10 years	14 of 100 (Routine)
5 September 1983	Nanchital (Smn), MX	daily high max	40.0 C (104.0 F)	3.3 C (5.9 F)	10 years	20 of 100 (Routine)
18 August 1983	Nanchital (Smn), MX	daily high min	25.6 C (78.1 F)	0.6 C (1.1 F)	18 years	13 of 100 (Routine)
17 August 1983	Nanchital (Smn), MX	daily high min (Tie)	25.0 C (77.0 F)	tie	16 years	2 of 100 (Routine)
31 July 1983	Nanchital (Smn), MX	monthly rain	215.9 mm (8.5 in)	66.0 mm (2.6 in)	42 years	60 of 100 (Major)
27 July 1983	Nanchital (Smn), MX	daily rain	39.9 mm (1.6 in)	3.6 mm (0.14 in)	10 years	8 of 100 (Routine)
17 July 1983	Nanchital (Smn), MX	daily rain (Tie)	63.0 mm (2.5 in)	tie	12 years	1 of 100 (Routine)
11 July 1983	Nanchital (Smn), MX	daily low min	21.1 C (70.0 F)	0.6 C (1.1 F)	12 years	11 of 100 (Routine)
5 July 1983	Nanchital (Smn), MX	monthly high max (Tie)	38.9 C (102.0 F)	tie	9 years	4 of 100 (Routine)

Climate Trend

22 complete years, 1940 to 1983

One stripe for each of 22 complete years at Nanchital (Smn), 1940 to 1983. Blue stripes are years cooler than the station's own mean of 25.7 C (78.3 F); red stripes are warmer. The coolest year was 1940, at 24.4 C (75.9 F), and the warmest was 1972, at 27.3 C (81.1 F). The strongest colour marks a difference of 1.6 C (2.9 F).

Annual mean temperature at Nanchital (Smn) as warming stripes, 1940 to 1983
Year	Annual mean temperature	Difference from the station mean
1940	24.4 C	-1.35 C
1941	24.8 C	-0.89 C
1944	25.1 C	-0.64 C
1945	25.0 C	-0.71 C
1961	26.0 C	+0.28 C
1962	26.1 C	+0.38 C
1963	25.7 C	+0.00 C
1964	25.9 C	+0.15 C
1967	26.0 C	+0.23 C
1968	26.0 C	+0.28 C
1969	26.0 C	+0.31 C
1971	26.2 C	+0.47 C
1972	27.3 C	+1.55 C
1973	26.0 C	+0.25 C
1974	25.6 C	-0.12 C
1975	25.7 C	+0.02 C
1976	25.2 C	-0.49 C
1977	25.4 C	-0.34 C
1978	26.0 C	+0.30 C
1979	25.6 C	-0.11 C
1982	25.3 C	-0.43 C
1983	26.5 C	+0.82 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

1939 to 1983

Yearly extremes at Nanchital (Smn): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	42.8 C (109.0 F)	1979	39.4 C (102.9 F)	33
Coldest night (TNn)	9.4 C (48.9 F)	1982	11.7 C (53.1 F)	33
Wettest day (Rx1day)	301.0 mm (11.9 in)	1966	146.8 mm (5.8 in)	33
Wettest five days (Rx5day)	623.3 mm (24.5 in)	1966	286.3 mm (11.3 in)	33
Longest dry spell (CDD)	56 days	1961	29 days	33

Hottest day (TXx)

The hottest day of the year at Nanchital (Smn), 1939 to 1983. The record is 42.8 C (109.0 F) in 1979, marked on the chart; the median year is 39.4 C (102.9 F).

Hottest day (TXx) at Nanchital (Smn) by year
Year	Hottest day (TXx)
1939	36.7 C (98.1 F)
1940	37.8 C (100.0 F)
1941	38.3 C (100.9 F)
1943	35.6 C (96.1 F)
1944	38.9 C (102.0 F)
1945	38.9 C (102.0 F)
1946	37.8 C (100.0 F)
1947	36.7 C (98.1 F)
1948	35.0 C (95.0 F)
1960	35.6 C (96.1 F)
1961	40.0 C (104.0 F)
1962	40.0 C (104.0 F)
1963	38.3 C (100.9 F)
1964	41.7 C (107.1 F)
1965	40.0 C (104.0 F)
1966	37.8 C (100.0 F)
1967	40.6 C (105.1 F)
1968	37.8 C (100.0 F)
1969	41.7 C (107.1 F)
1970	40.0 C (104.0 F)
1971	41.7 C (107.1 F)
1972	38.9 C (102.0 F)
1973	38.9 C (102.0 F)
1974	38.9 C (102.0 F)
1975	40.6 C (105.1 F)
1976	40.0 C (104.0 F)
1977	40.0 C (104.0 F)
1978	41.1 C (106.0 F)
1979	42.8 C (109.0 F)
1980	41.7 C (107.1 F)
1981	40.0 C (104.0 F)
1982	39.4 C (102.9 F)
1983	40.0 C (104.0 F)

Coldest night (TNn)

The coldest night of the year at Nanchital (Smn), 1939 to 1983. The record is 9.4 C (48.9 F) in 1982, marked on the chart; the median year is 11.7 C (53.1 F).

Coldest night (TNn) at Nanchital (Smn) by year
Year	Coldest night (TNn)
1939	13.9 C (57.0 F)
1940	10.0 C (50.0 F)
1941	10.0 C (50.0 F)
1943	12.2 C (54.0 F)
1944	11.7 C (53.1 F)
1945	11.7 C (53.1 F)
1946	11.7 C (53.1 F)
1947	11.7 C (53.1 F)
1948	11.7 C (53.1 F)
1960	20.0 C (68.0 F)
1961	13.9 C (57.0 F)
1962	12.8 C (55.0 F)
1963	10.0 C (50.0 F)
1964	11.7 C (53.1 F)
1965	12.2 C (54.0 F)
1966	10.6 C (51.1 F)
1967	10.6 C (51.1 F)
1968	12.8 C (55.0 F)
1969	11.7 C (53.1 F)
1970	12.8 C (55.0 F)
1971	11.7 C (53.1 F)
1972	11.7 C (53.1 F)
1973	11.7 C (53.1 F)
1974	11.7 C (53.1 F)
1975	13.9 C (57.0 F)
1976	10.0 C (50.0 F)
1977	13.3 C (55.9 F)
1978	11.7 C (53.1 F)
1979	10.6 C (51.1 F)
1980	10.6 C (51.1 F)
1981	10.6 C (51.1 F)
1982	9.4 C (48.9 F)
1983	11.7 C (53.1 F)

Wettest day (Rx1day)

The wettest day of the year at Nanchital (Smn), 1939 to 1983. The record is 301.0 mm (11.9 in) in 1966, marked on the chart; the median year is 146.8 mm (5.8 in).

Wettest day (Rx1day) at Nanchital (Smn) by year
Year	Wettest day (Rx1day)
1939	199.9 mm (7.9 in)
1940	147.1 mm (5.8 in)
1941	149.9 mm (5.9 in)
1943	224.8 mm (8.9 in)
1944	120.4 mm (4.7 in)
1945	195.8 mm (7.7 in)
1946	186.4 mm (7.3 in)
1947	151.9 mm (6.0 in)
1948	96.8 mm (3.8 in)
1960	100.3 mm (3.9 in)
1961	177.8 mm (7.0 in)
1962	101.9 mm (4.0 in)
1963	138.9 mm (5.5 in)
1964	216.9 mm (8.5 in)
1965	112.8 mm (4.4 in)
1966	301.0 mm (11.9 in)
1967	146.8 mm (5.8 in)
1968	163.8 mm (6.4 in)
1969	234.4 mm (9.2 in)
1970	119.9 mm (4.7 in)
1971	112.8 mm (4.4 in)
1972	184.9 mm (7.3 in)
1973	175.3 mm (6.9 in)
1974	125.0 mm (4.9 in)
1975	140.0 mm (5.5 in)
1976	140.0 mm (5.5 in)
1977	119.9 mm (4.7 in)
1978	95.0 mm (3.7 in)
1979	59.9 mm (2.4 in)
1980	119.9 mm (4.7 in)
1981	83.3 mm (3.3 in)
1982	220.0 mm (8.7 in)
1983	215.9 mm (8.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Nanchital (Smn), 1939 to 1983. The record is 623.3 mm (24.5 in) in 1966, marked on the chart; the median year is 286.3 mm (11.3 in).

Wettest five days (Rx5day) at Nanchital (Smn) by year
Year	Wettest five days (Rx5day)
1939	392.7 mm (15.5 in)
1940	278.4 mm (11.0 in)
1941	209.6 mm (8.3 in)
1943	463.9 mm (18.3 in)
1944	342.4 mm (13.5 in)
1945	242.3 mm (9.5 in)
1946	295.2 mm (11.6 in)
1947	287.4 mm (11.3 in)
1948	200.4 mm (7.9 in)
1960	170.4 mm (6.7 in)
1961	551.5 mm (21.7 in)
1962	244.7 mm (9.6 in)
1963	292.3 mm (11.5 in)
1964	277.7 mm (10.9 in)
1965	153.8 mm (6.1 in)
1966	623.3 mm (24.5 in)
1967	251.8 mm (9.9 in)
1968	292.2 mm (11.5 in)
1969	286.3 mm (11.3 in)
1970	230.6 mm (9.1 in)
1971	284.8 mm (11.2 in)
1972	336.1 mm (13.2 in)
1973	432.4 mm (17.0 in)
1974	193.6 mm (7.6 in)
1975	352.5 mm (13.9 in)
1976	183.7 mm (7.2 in)
1977	255.1 mm (10.0 in)
1978	299.5 mm (11.8 in)
1979	154.8 mm (6.1 in)
1980	359.4 mm (14.1 in)
1981	250.5 mm (9.9 in)
1982	602.3 mm (23.7 in)
1983	320.6 mm (12.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Nanchital (Smn), 1939 to 1983. The record is 56 days in 1961, marked on the chart; the median year is 29 days.

Longest dry spell (CDD) at Nanchital (Smn) by year
Year	Longest dry spell (CDD)
1939	23 days
1940	26 days
1941	23 days
1943	13 days
1944	52 days
1945	44 days
1946	33 days
1947	20 days
1948	51 days
1960	9 days
1961	56 days
1962	40 days
1963	21 days
1964	28 days
1965	37 days
1966	28 days
1967	24 days
1968	20 days
1969	19 days
1970	51 days
1971	35 days
1972	28 days
1973	36 days
1974	28 days
1975	36 days
1976	30 days
1977	49 days
1978	56 days
1979	23 days
1980	33 days
1981	40 days
1982	29 days
1983	24 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.

Download the Data

Data for Nanchital (Smn) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Nanchital (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 2026-10-13 (13 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).