Nopalapan Weather Records (MXN00030116)

Record envelope, standing records and threshold days for Nopalapan (MXN00030116), Mexico, with 39 years of record.

Key Facts for Nopalapan

Nopalapan (MXN00030116) is a weather station in Mexico at 18.10 latitude and -95.32 longitude, 28 m (91 ft) above sea level.
The station reports from 1944 to 1982, 39 years of record.
1,464 records set at Nopalapan still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Nopalapan tied a monthly record daily precipitation of 59.9 mm (2.4 in) on 8 December 1982.

About the Station

Location: Mexico, 18.10 latitude, -95.32 longitude.
Elevation: 28 m (91 ft).
Period of record: 1944 to 1982, 39 years.
Eligible elements: 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 Nopalapan. 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 Nopalapan, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	36.7 C (98.1 F)	2.8 C (37.0 F)	n/a	n/a
Feb	37.8 C (100.0 F)	3.9 C (39.0 F)	n/a	n/a
Mar	45.0 C (113.0 F)	7.8 C (46.0 F)	n/a	n/a
Apr	40.6 C (105.1 F)	6.7 C (44.1 F)	n/a	n/a
May	43.9 C (111.0 F)	8.9 C (48.0 F)	n/a	n/a
Jun	40.6 C (105.1 F)	10.6 C (51.1 F)	n/a	n/a
Jul	40.6 C (105.1 F)	10.6 C (51.1 F)	n/a	n/a
Aug	43.9 C (111.0 F)	11.7 C (53.1 F)	n/a	n/a
Sep	40.0 C (104.0 F)	10.6 C (51.1 F)	n/a	n/a
Oct	38.9 C (102.0 F)	6.7 C (44.1 F)	n/a	n/a
Nov	36.7 C (98.1 F)	5.6 C (42.1 F)	n/a	n/a
Dec	35.6 C (96.1 F)	3.9 C (39.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Nopalapan still stand. 1948 holds the most, with 241.

Standing records at Nopalapan by the year they were set
Year set	Standing records
1944	33
1945	3
1946	26
1947	100
1948	241
1949	44
1950	96
1951	121
1952	119
1953	46
1954	23
1955	14
1956	62
1957	29
1958	14
1959	9
1960	12
1961	15
1962	20
1963	28
1964	16
1965	13
1966	10
1967	32
1968	7
1969	22
1970	20
1973	84
1974	182
1975	9
1977	5
1981	7
1982	2

Wettest Day of Each Month

Sep: 300.0 mm (11.8 in)

The wettest day on record for each calendar month at Nopalapan. The most was 300.0 mm (11.8 in) on 22 September 1952.

Record daily precipitation for each month at Nopalapan
Month	Record daily precipitation (mm)	Date
Jan	34.8 mm (1.4 in)	12 January 1974
Feb	63.5 mm (2.5 in)	26 February 1957
Mar	74.9 mm (2.9 in)	15 March 1949
Apr	39.4 mm (1.6 in)	15 April 1954
May	87.9 mm (3.5 in)	19 May 1968
Jun	99.8 mm (3.9 in)	29 June 1981
Jul	99.8 mm (3.9 in)	13 July 1981
Aug	95.8 mm (3.8 in)	4 August 1969
Sep	300.0 mm (11.8 in)	22 September 1952
Oct	88.4 mm (3.5 in)	7 October 1954
Nov	98.8 mm (3.9 in)	7 November 1971
Dec	59.9 mm (2.4 in)	7 December 1982

Period of Record Coverage

1944 to 1982

33 years of record at Nopalapan, 1944 to 1982. 9 years have data for under 90 percent of days and are left out of rankings: 1944, 1945, 1946, 1956, 1970, 1973, 1975, 1977 and others.

Days with data per year at Nopalapan
Year	Days with data	Share of year	Complete
1944	227	62%	No
1945	58	16%	No
1946	195	53%	No
1947	364	100%	Yes
1948	366	100%	Yes
1949	364	100%	Yes
1950	365	100%	Yes
1951	362	99%	Yes
1952	363	99%	Yes
1953	363	99%	Yes
1954	363	99%	Yes
1955	331	91%	Yes
1956	323	88%	No
1957	362	99%	Yes
1958	362	99%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	337	92%	Yes
1963	360	99%	Yes
1964	366	100%	Yes
1965	364	100%	Yes
1966	364	100%	Yes
1967	365	100%	Yes
1968	364	99%	Yes
1969	351	96%	Yes
1970	160	44%	No
1973	223	61%	No
1974	333	91%	Yes
1975	31	8%	No
1977	92	25%	No
1981	333	91%	Yes
1982	150	41%	No

Latest Records

Latest records at Nopalapan
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
8 December 1982	Nopalapan, MX	monthly rain (Tie)	59.9 mm (2.4 in)	tie	0 years	3 of 100 (Routine)
7 December 1982	Nopalapan, MX	monthly rain	59.9 mm (2.4 in)	10.1 mm (0.4 in)	10 years	27 of 100 (Routine)
8 September 1982	Nopalapan, MX	daily rain	64.8 mm (2.6 in)	25.9 mm (1.0 in)	27 years	18 of 100 (Routine)
7 September 1982	Nopalapan, MX	daily rain (Tie)	34.8 mm (1.4 in)	tie	12 years	1 of 100 (Routine)
9 December 1981	Nopalapan, MX	daily rain	2.8 mm (0.11 in)	1.0 mm (0.04 in)	11 years	7 of 100 (Routine)
31 October 1981	Nopalapan, MX	daily rain	11.9 mm (0.5 in)	4.0 mm (0.16 in)	16 years	9 of 100 (Routine)
26 October 1981	Nopalapan, MX	daily rain	33.8 mm (1.3 in)	5.9 mm (0.23 in)	16 years	10 of 100 (Routine)
17 September 1981	Nopalapan, MX	daily rain	59.9 mm (2.4 in)	29.9 mm (1.2 in)	30 years	20 of 100 (Routine)
31 July 1981	Nopalapan, MX	daily rain (Tie)	19.8 mm (0.8 in)	tie	35 years	3 of 100 (Routine)
14 July 1981	Nopalapan, MX	daily rain	46.0 mm (1.8 in)	16.0 mm (0.6 in)	35 years	23 of 100 (Routine)
13 July 1981	Nopalapan, MX	monthly rain	99.8 mm (3.9 in)	11.9 mm (0.5 in)	7 years	23 of 100 (Routine)
7 July 1981	Nopalapan, MX	daily rain	49.8 mm (2.0 in)	9.9 mm (0.39 in)	32 years	18 of 100 (Routine)
29 June 1981	Nopalapan, MX	monthly rain	99.8 mm (3.9 in)	11.9 mm (0.5 in)	15 years	25 of 100 (Routine)
16 June 1981	Nopalapan, MX	daily rain	19.8 mm (0.8 in)	4.1 mm (0.16 in)	22 years	11 of 100 (Routine)
14 June 1981	Nopalapan, MX	daily rain	54.9 mm (2.2 in)	18.1 mm (0.7 in)	20 years	21 of 100 (Routine)
2 June 1981	Nopalapan, MX	daily rain	30.0 mm (1.2 in)	22.1 mm (0.9 in)	8 years	20 of 100 (Routine)
31 May 1981	Nopalapan, MX	daily rain	19.8 mm (0.8 in)	9.9 mm (0.39 in)	31 years	18 of 100 (Routine)
25 April 1981	Nopalapan, MX	daily rain	34.8 mm (1.4 in)	26.9 mm (1.1 in)	35 years	38 of 100 (Notable)
14 March 1981	Nopalapan, MX	daily rain	0.8 mm (0.03 in)	0.8 mm (0.03 in)	36 years	13 of 100 (Routine)
18 February 1981	Nopalapan, MX	daily rain	4.8 mm (0.19 in)	2.0 mm (0.08 in)	12 years	7 of 100 (Routine)

Climate Trend

20 complete years, 1947 to 1969

One stripe for each of 20 complete years at Nopalapan, 1947 to 1969. Blue stripes are years cooler than the station's own mean of 25.3 C (77.6 F); red stripes are warmer. The coolest year was 1961, at 22.9 C (73.3 F), and the warmest was 1948, at 30.1 C (86.1 F). The strongest colour marks a difference of 4.8 C (8.6 F).

Annual mean temperature at Nopalapan as warming stripes, 1947 to 1969
Year	Annual mean temperature	Difference from the station mean
1947	27.4 C	+2.02 C
1948	30.1 C	+4.71 C
1949	26.0 C	+0.61 C
1950	23.3 C	-2.08 C
1951	24.1 C	-1.28 C
1952	24.1 C	-1.28 C
1953	23.6 C	-1.79 C
1954	24.6 C	-0.76 C
1957	24.6 C	-0.75 C
1958	24.7 C	-0.62 C
1959	24.8 C	-0.53 C
1960	25.1 C	-0.28 C
1961	22.9 C	-2.41 C
1963	26.3 C	+0.98 C
1964	26.1 C	+0.71 C
1965	25.9 C	+0.52 C
1966	25.3 C	-0.09 C
1967	26.2 C	+0.85 C
1968	25.8 C	+0.46 C
1969	26.3 C	+0.96 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

1944 to 1982

Yearly extremes at Nopalapan: 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)	1963	40.0 C (104.0 F)	33
Coldest night (TNn)	2.8 C (37.0 F)	1956	10.0 C (50.0 F)	33
Wettest day (Rx1day)	300.0 mm (11.8 in)	1952	75.9 mm (3.0 in)	35
Wettest five days (Rx5day)	569.7 mm (22.4 in)	1952	154.5 mm (6.1 in)	35
Longest dry spell (CDD)	120 days	1947	43 days	35

Hottest day (TXx)

The hottest day of the year at Nopalapan, 1944 to 1982. The record is 45.0 C (113.0 F) in 1963, marked on the chart; the median year is 40.0 C (104.0 F).

Hottest day (TXx) at Nopalapan by year
Year	Hottest day (TXx)
1944	43.9 C (111.0 F)
1945	36.7 C (98.1 F)
1946	35.6 C (96.1 F)
1947	40.0 C (104.0 F)
1948	40.6 C (105.1 F)
1949	37.8 C (100.0 F)
1950	35.0 C (95.0 F)
1951	38.9 C (102.0 F)
1952	37.8 C (100.0 F)
1953	37.8 C (100.0 F)
1954	40.0 C (104.0 F)
1955	40.6 C (105.1 F)
1956	38.9 C (102.0 F)
1957	40.0 C (104.0 F)
1958	43.9 C (111.0 F)
1959	37.8 C (100.0 F)
1960	41.7 C (107.1 F)
1961	40.6 C (105.1 F)
1962	41.7 C (107.1 F)
1963	45.0 C (113.0 F)
1964	40.6 C (105.1 F)
1965	40.6 C (105.1 F)
1966	38.9 C (102.0 F)
1967	41.7 C (107.1 F)
1968	40.0 C (104.0 F)
1969	40.6 C (105.1 F)
1970	41.7 C (107.1 F)
1971	n/a
1972	n/a
1973	40.0 C (104.0 F)
1974	40.0 C (104.0 F)
1975	32.8 C (91.0 F)
1977	37.8 C (100.0 F)
1981	38.9 C (102.0 F)
1982	38.9 C (102.0 F)

Coldest night (TNn)

The coldest night of the year at Nopalapan, 1944 to 1982. The record is 2.8 C (37.0 F) in 1956, marked on the chart; the median year is 10.0 C (50.0 F).

Coldest night (TNn) at Nopalapan by year
Year	Coldest night (TNn)
1944	10.6 C (51.1 F)
1945	13.9 C (57.0 F)
1946	11.7 C (53.1 F)
1947	11.7 C (53.1 F)
1948	17.8 C (64.0 F)
1949	13.9 C (57.0 F)
1950	12.8 C (55.0 F)
1951	11.7 C (53.1 F)
1952	15.0 C (59.0 F)
1953	13.9 C (57.0 F)
1954	8.9 C (48.0 F)
1955	10.0 C (50.0 F)
1956	2.8 C (37.0 F)
1957	2.8 C (37.0 F)
1958	6.7 C (44.1 F)
1959	5.6 C (42.1 F)
1960	6.7 C (44.1 F)
1961	6.7 C (44.1 F)
1962	3.9 C (39.0 F)
1963	8.9 C (48.0 F)
1964	10.0 C (50.0 F)
1965	10.6 C (51.1 F)
1966	10.0 C (50.0 F)
1967	8.3 C (46.9 F)
1968	7.8 C (46.0 F)
1969	12.8 C (55.0 F)
1970	11.7 C (53.1 F)
1971	n/a
1972	n/a
1973	7.8 C (46.0 F)
1974	3.9 C (39.0 F)
1975	2.8 C (37.0 F)
1977	10.6 C (51.1 F)
1981	10.0 C (50.0 F)
1982	10.6 C (51.1 F)

Wettest day (Rx1day)

The wettest day of the year at Nopalapan, 1944 to 1982. The record is 300.0 mm (11.8 in) in 1952, marked on the chart; the median year is 75.9 mm (3.0 in).

Wettest day (Rx1day) at Nopalapan by year
Year	Wettest day (Rx1day)
1944	216.9 mm (8.5 in)
1945	59.9 mm (2.4 in)
1946	49.8 mm (2.0 in)
1947	34.8 mm (1.4 in)
1948	39.9 mm (1.6 in)
1949	134.9 mm (5.3 in)
1950	49.8 mm (2.0 in)
1951	39.9 mm (1.6 in)
1952	300.0 mm (11.8 in)
1953	39.9 mm (1.6 in)
1954	88.4 mm (3.5 in)
1955	110.0 mm (4.3 in)
1956	63.8 mm (2.5 in)
1957	75.9 mm (3.0 in)
1958	65.8 mm (2.6 in)
1959	68.8 mm (2.7 in)
1960	68.8 mm (2.7 in)
1961	47.0 mm (1.9 in)
1962	78.0 mm (3.1 in)
1963	173.0 mm (6.8 in)
1964	79.8 mm (3.1 in)
1965	81.8 mm (3.2 in)
1966	87.9 mm (3.5 in)
1967	63.8 mm (2.5 in)
1968	87.9 mm (3.5 in)
1969	95.8 mm (3.8 in)
1970	90.9 mm (3.6 in)
1971	98.8 mm (3.9 in)
1972	59.9 mm (2.4 in)
1973	93.0 mm (3.7 in)
1974	299.0 mm (11.8 in)
1975	1.8 mm (0.07 in)
1977	42.9 mm (1.7 in)
1981	99.8 mm (3.9 in)
1982	64.8 mm (2.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Nopalapan, 1944 to 1982. The record is 569.7 mm (22.4 in) in 1952, marked on the chart; the median year is 154.5 mm (6.1 in).

Wettest five days (Rx5day) at Nopalapan by year
Year	Wettest five days (Rx5day)
1944	355.8 mm (14.0 in)
1945	156.4 mm (6.2 in)
1946	119.4 mm (4.7 in)
1947	77.5 mm (3.1 in)
1948	132.4 mm (5.2 in)
1949	304.4 mm (12.0 in)
1950	154.5 mm (6.1 in)
1951	119.7 mm (4.7 in)
1952	569.7 mm (22.4 in)
1953	134.7 mm (5.3 in)
1954	261.4 mm (10.3 in)
1955	179.2 mm (7.1 in)
1956	112.4 mm (4.4 in)
1957	175.5 mm (6.9 in)
1958	153.1 mm (6.0 in)
1959	77.5 mm (3.1 in)
1960	166.3 mm (6.5 in)
1961	92.5 mm (3.6 in)
1962	147.4 mm (5.8 in)
1963	240.6 mm (9.5 in)
1964	192.6 mm (7.6 in)
1965	107.0 mm (4.2 in)
1966	149.6 mm (5.9 in)
1967	158.5 mm (6.2 in)
1968	121.4 mm (4.8 in)
1969	132.2 mm (5.2 in)
1970	206.8 mm (8.1 in)
1971	194.9 mm (7.7 in)
1972	175.4 mm (6.9 in)
1973	167.2 mm (6.6 in)
1974	398.3 mm (15.7 in)
1975	2.6 mm (0.10 in)
1977	70.8 mm (2.8 in)
1981	171.4 mm (6.7 in)
1982	128.1 mm (5.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Nopalapan, 1944 to 1982. The record is 120 days in 1947, marked on the chart; the median year is 43 days.

Longest dry spell (CDD) at Nopalapan by year
Year	Longest dry spell (CDD)
1944	19 days
1945	106 days
1946	68 days
1947	120 days
1948	58 days
1949	49 days
1950	36 days
1951	92 days
1952	95 days
1953	42 days
1954	41 days
1955	75 days
1956	69 days
1957	40 days
1958	53 days
1959	50 days
1960	63 days
1961	30 days
1962	59 days
1963	50 days
1964	29 days
1965	30 days
1966	25 days
1967	30 days
1968	38 days
1969	39 days
1970	62 days
1971	57 days
1972	39 days
1973	39 days
1974	43 days
1975	15 days
1977	26 days
1981	56 days
1982	41 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

30 years, 1945 to 1981

A day with at least 71.6 mm (2.8 in) of rain is expected about once in 2 years. A day with at least 375.2 mm (14.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Nopalapan: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	71.6 mm (2.8 in)
5 years	112.3 mm (4.4 in)
10 years	150.8 mm (5.9 in)
25 years	218.2 mm (8.6 in)
50 years	286.6 mm (11.3 in)	Longer than the 30 years of record
100 years	375.2 mm (14.8 in)	Longer than the 30 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, 30 years of values from 1945 to 1981.

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: 300.0 mm (11.8 in) in 1952; 299.0 mm (11.8 in) in 1974; 173.0 mm (6.8 in) in 1963.

Download the Data

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