Paso del Cuarenta I Weather Records (MXN00014106)

Record envelope, standing records and threshold days for Paso del Cuarenta I (MXN00014106), Mexico, with 62 years of record.

Key Facts for Paso del Cuarenta I

Paso del Cuarenta I (MXN00014106) is a weather station in Mexico at 21.48 latitude and -101.73 longitude, 1,947 m (6,387 ft) above sea level.
The station reports from 1941 to 2002, 62 years of record.
1,464 records set at Paso del Cuarenta I still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Paso del Cuarenta I tied a daily record low maximum temperature of 17.8 C (64.0 F) on 27 November 2002.

About the Station

Location: Mexico, 21.48 latitude, -101.73 longitude.
Elevation: 1,947 m (6,387 ft).
Period of record: 1941 to 2002, 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 Paso del Cuarenta I. 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 Paso del Cuarenta I, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	31.1 C (88.0 F)	-7.2 C (19.0 F)	n/a	n/a
Feb	35.6 C (96.1 F)	-5.0 C (23.0 F)	n/a	n/a
Mar	38.9 C (102.0 F)	-5.0 C (23.0 F)	n/a	n/a
Apr	36.7 C (98.1 F)	-3.3 C (26.1 F)	n/a	n/a
May	38.9 C (102.0 F)	1.7 C (35.1 F)	n/a	n/a
Jun	37.8 C (100.0 F)	3.9 C (39.0 F)	n/a	n/a
Jul	33.3 C (91.9 F)	6.1 C (43.0 F)	n/a	n/a
Aug	35.0 C (95.0 F)	5.6 C (42.1 F)	n/a	n/a
Sep	33.9 C (93.0 F)	2.8 C (37.0 F)	n/a	n/a
Oct	37.8 C (100.0 F)	0.0 C (32.0 F)	n/a	n/a
Nov	31.7 C (89.1 F)	-5.0 C (23.0 F)	n/a	n/a
Dec	30.0 C (86.0 F)	-6.7 C (19.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Paso del Cuarenta I still stand. 1941 holds the most, with 99.

Standing records at Paso del Cuarenta I by the year they were set
Year set	Standing records
1941	99
1942	66
1943	31
1944	26
1945	51
1946	48
1947	17
1948	24
1949	24
1950	10
1951	24
1952	38
1953	40
1954	17
1955	11
1956	11
1957	18
1958	28
1959	21
1960	14
1961	26
1962	26
1963	25
1964	18
1965	30
1966	40
1967	48
1968	91
1969	92
1970	18
1971	17
1972	13
1973	13
1974	13
1975	16
1976	24
1977	9
1978	7
1979	27
1980	13
1981	9
1982	6
1983	24
1984	12
1985	14
1986	22
1987	17
1988	25
1989	9
1990	15
1991	14
1992	22
1993	18
1994	8
1999	5
2000	19
2001	33
2002	8

All-Time Record Progression

2 new records

2 all-time records were set at Paso del Cuarenta I between 10 July 1976 and 29 August 2001. Each dot is a new record.

When Paso del Cuarenta I set new all-time records
Date	Kind	Detail
1976-07-10	Record daily precipitation	Record daily precipitation 95.3 mm (3.8 in)
2001-08-29	Record daily precipitation	Record daily precipitation 123.2 mm (4.9 in)

Wettest Day of Each Month

Aug: 123.2 mm (4.9 in)

The wettest day on record for each calendar month at Paso del Cuarenta I. The most was 123.2 mm (4.9 in) on 29 August 2001.

Record daily precipitation for each month at Paso del Cuarenta I
Month	Record daily precipitation (mm)	Date
Jan	40.1 mm (1.6 in)	13 January 2002
Feb	41.1 mm (1.6 in)	11 February 1966
Mar	37.8 mm (1.5 in)	23 March 1967
Apr	23.9 mm (0.9 in)	3 April 1966
May	43.9 mm (1.7 in)	31 May 1972
Jun	91.2 mm (3.6 in)	13 June 1994
Jul	95.3 mm (3.8 in)	10 July 1976
Aug	123.2 mm (4.9 in)	29 August 2001
Sep	71.6 mm (2.8 in)	13 September 1963
Oct	55.9 mm (2.2 in)	14 October 1966
Nov	50.5 mm (2.0 in)	18 November 1976
Dec	28.4 mm (1.1 in)	3 December 1979

Period of Record Coverage

1941 to 2002

58 years of record at Paso del Cuarenta I, 1941 to 2002. 6 years have data for under 90 percent of days and are left out of rankings: 1960, 1989, 1990, 1991, 1999, 2000.

Days with data per year at Paso del Cuarenta I
Year	Days with data	Share of year	Complete
1941	351	96%	Yes
1942	355	97%	Yes
1943	353	97%	Yes
1944	353	96%	Yes
1945	354	97%	Yes
1946	348	95%	Yes
1947	353	97%	Yes
1948	359	98%	Yes
1949	349	96%	Yes
1950	363	99%	Yes
1951	362	99%	Yes
1952	360	98%	Yes
1953	362	99%	Yes
1954	363	99%	Yes
1955	364	100%	Yes
1956	365	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	363	99%	Yes
1960	195	53%	No
1961	358	98%	Yes
1962	353	97%	Yes
1963	351	96%	Yes
1964	355	97%	Yes
1965	355	97%	Yes
1966	343	94%	Yes
1967	357	98%	Yes
1968	364	99%	Yes
1969	363	99%	Yes
1970	354	97%	Yes
1971	353	97%	Yes
1972	361	99%	Yes
1973	354	97%	Yes
1974	329	90%	Yes
1975	352	96%	Yes
1976	363	99%	Yes
1977	355	97%	Yes
1978	360	99%	Yes
1979	359	98%	Yes
1980	366	100%	Yes
1981	361	99%	Yes
1982	360	99%	Yes
1983	355	97%	Yes
1984	360	98%	Yes
1985	362	99%	Yes
1986	360	99%	Yes
1987	332	91%	Yes
1988	364	99%	Yes
1989	212	58%	No
1990	245	67%	No
1991	325	89%	No
1992	366	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1999	320	88%	No
2000	316	86%	No
2001	360	99%	Yes
2002	333	91%	Yes

Latest Records

Latest records at Paso del Cuarenta I
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 November 2002	Paso del Cuarenta I, MX	daily low max (Tie)	17.8 C (64.0 F)	tie	39 years	4 of 100 (Routine)
6 November 2002	Paso del Cuarenta I, MX	daily low max	15.0 C (59.0 F)	2.2 C (4.0 F)	43 years	25 of 100 (Routine)
5 November 2002	Paso del Cuarenta I, MX	daily high min (Tie)	14.4 C (57.9 F)	tie	32 years	3 of 100 (Routine)
4 November 2002	Paso del Cuarenta I, MX	daily rain	21.3 mm (0.8 in)	17.2 mm (0.7 in)	29 years	20 of 100 (Routine)
4 November 2002	Paso del Cuarenta I, MX	daily high min	12.8 C (55.0 F)	0.6 C (1.1 F)	51 years	22 of 100 (Routine)
3 November 2002	Paso del Cuarenta I, MX	daily high min (Tie)	12.8 C (55.0 F)	tie	60 years	6 of 100 (Routine)
28 October 2002	Paso del Cuarenta I, MX	daily rain	20.3 mm (0.8 in)	9.1 mm (0.36 in)	44 years	20 of 100 (Routine)
25 October 2002	Paso del Cuarenta I, MX	daily rain (Tie)	1.3 mm (0.05 in)	tie	44 years	4 of 100 (Routine)
22 October 2002	Paso del Cuarenta I, MX	daily rain	25.9 mm (1.0 in)	17.5 mm (0.7 in)	39 years	34 of 100 (Routine)
15 September 2002	Paso del Cuarenta I, MX	daily high min	15.6 C (60.1 F)	0.6 C (1.1 F)	60 years	26 of 100 (Routine)
14 September 2002	Paso del Cuarenta I, MX	daily high min (Tie)	15.6 C (60.1 F)	tie	52 years	5 of 100 (Routine)
9 September 2002	Paso del Cuarenta I, MX	daily high min (Tie)	15.6 C (60.1 F)	tie	60 years	6 of 100 (Routine)
15 August 2002	Paso del Cuarenta I, MX	daily rain	39.4 mm (1.6 in)	1.6 mm (0.06 in)	56 years	24 of 100 (Routine)
14 August 2002	Paso del Cuarenta I, MX	daily rain	45.0 mm (1.8 in)	4.6 mm (0.18 in)	21 years	16 of 100 (Routine)
4 August 2002	Paso del Cuarenta I, MX	daily rain	25.7 mm (1.0 in)	0.3 mm (0.01 in)	49 years	20 of 100 (Routine)
31 July 2002	Paso del Cuarenta I, MX	monthly low max	16.1 C (61.0 F)	0.6 C (1.1 F)	26 years	25 of 100 (Routine)
1 July 2002	Paso del Cuarenta I, MX	daily rain	44.2 mm (1.7 in)	3.3 mm (0.13 in)	19 years	13 of 100 (Routine)
25 June 2002	Paso del Cuarenta I, MX	daily high max (Tie)	32.8 C (91.0 F)	tie	47 years	5 of 100 (Routine)
28 April 2002	Paso del Cuarenta I, MX	daily high max (Tie)	35.0 C (95.0 F)	tie	60 years	6 of 100 (Routine)
23 April 2002	Paso del Cuarenta I, MX	daily high min (Tie)	13.9 C (57.0 F)	tie	52 years	5 of 100 (Routine)

Climate Trend

49 complete years, 1941 to 2001

One stripe for each of 49 complete years at Paso del Cuarenta I, 1941 to 2001. Blue stripes are years cooler than the station's own mean of 17.4 C (63.3 F); red stripes are warmer. The coolest year was 1966, at 15.4 C (59.6 F), and the warmest was 1953, at 19.1 C (66.4 F). The strongest colour marks a difference of 2.1 C (3.8 F).

Annual mean temperature at Paso del Cuarenta I as warming stripes, 1941 to 2001
Year	Annual mean temperature	Difference from the station mean
1941	18.8 C	+1.40 C
1942	18.6 C	+1.21 C
1943	18.0 C	+0.59 C
1944	17.7 C	+0.35 C
1945	18.3 C	+0.96 C
1946	18.7 C	+1.35 C
1947	17.9 C	+0.55 C
1948	18.1 C	+0.75 C
1949	18.2 C	+0.79 C
1950	18.2 C	+0.87 C
1951	19.0 C	+1.60 C
1952	18.9 C	+1.51 C
1953	19.1 C	+1.73 C
1954	19.0 C	+1.61 C
1955	18.5 C	+1.09 C
1956	18.1 C	+0.76 C
1957	18.9 C	+1.57 C
1958	18.2 C	+0.83 C
1959	17.6 C	+0.25 C
1961	16.1 C	-1.30 C
1962	16.3 C	-1.03 C
1963	16.1 C	-1.28 C
1964	15.9 C	-1.45 C
1965	15.8 C	-1.58 C
1966	15.4 C	-2.00 C
1967	16.4 C	-0.95 C
1968	17.9 C	+0.55 C
1969	19.0 C	+1.68 C
1970	16.6 C	-0.74 C
1971	16.5 C	-0.82 C
1972	17.1 C	-0.29 C
1973	16.9 C	-0.49 C
1975	16.4 C	-0.98 C
1976	16.3 C	-1.06 C
1977	16.7 C	-0.71 C
1978	16.9 C	-0.50 C
1979	16.9 C	-0.43 C
1980	17.3 C	-0.07 C
1981	16.9 C	-0.50 C
1982	17.1 C	-0.24 C
1983	16.3 C	-1.08 C
1984	16.5 C	-0.89 C
1985	16.6 C	-0.75 C
1986	16.6 C	-0.81 C
1988	16.6 C	-0.74 C
1992	16.3 C	-1.10 C
1993	16.6 C	-0.73 C
1994	17.1 C	-0.27 C
2001	18.4 C	+1.00 C

The annual mean temperature here has fallen by 0.4 C (0.2 to 0.5) per decade over 1941 to 2001. In Fahrenheit: 0.7 F (0.4 to 1.0) per decade. The slope is a straight line fitted to 49 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Paso del Cuarenta I
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.4 C (-0.5 to -0.2) per decade	-0.7 F (-1.0 to -0.4) per decade	1941 to 2001	49	Fall
Mean daily maximum	-0.5 C (-0.7 to -0.3) per decade	-0.8 F (-1.2 to -0.5) per decade	1941 to 2001	49	Fall
Mean daily minimum	-0.3 C (-0.5 to -0.1) per decade	-0.5 F (-0.8 to -0.2) per decade	1941 to 2001	49	Fall

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

1941 to 2002

Yearly extremes at Paso del Cuarenta I: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.9 C (102.0 F)	1942	35.0 C (95.0 F)	58
Coldest night (TNn)	-7.2 C (19.0 F)	1955	-3.3 C (26.1 F)	58
Wettest day (Rx1day)	123.2 mm (4.9 in)	2001	40.3 mm (1.6 in)	58
Wettest five days (Rx5day)	195.1 mm (7.7 in)	1971	85.9 mm (3.4 in)	58
Longest dry spell (CDD)	158 days	1953	68 days	58

Hottest day (TXx)

The hottest day of the year at Paso del Cuarenta I, 1941 to 2002. The record is 38.9 C (102.0 F) in 1942, marked on the chart; the median year is 35.0 C (95.0 F).

Hottest day (TXx) at Paso del Cuarenta I by year
Year	Hottest day (TXx)
1941	37.8 C (100.0 F)
1942	38.9 C (102.0 F)
1943	36.7 C (98.1 F)
1944	35.6 C (96.1 F)
1945	37.8 C (100.0 F)
1946	38.3 C (100.9 F)
1947	35.0 C (95.0 F)
1948	36.7 C (98.1 F)
1949	35.6 C (96.1 F)
1950	35.6 C (96.1 F)
1951	35.0 C (95.0 F)
1952	36.1 C (97.0 F)
1953	36.7 C (98.1 F)
1954	35.0 C (95.0 F)
1955	35.6 C (96.1 F)
1956	35.0 C (95.0 F)
1957	35.6 C (96.1 F)
1958	34.4 C (93.9 F)
1959	34.4 C (93.9 F)
1960	35.0 C (95.0 F)
1961	33.9 C (93.0 F)
1962	33.3 C (91.9 F)
1963	33.3 C (91.9 F)
1964	33.3 C (91.9 F)
1965	33.9 C (93.0 F)
1966	32.8 C (91.0 F)
1967	35.0 C (95.0 F)
1968	32.8 C (91.0 F)
1969	33.9 C (93.0 F)
1970	35.0 C (95.0 F)
1971	34.4 C (93.9 F)
1972	35.0 C (95.0 F)
1973	35.0 C (95.0 F)
1974	33.9 C (93.0 F)
1975	33.3 C (91.9 F)
1976	33.3 C (91.9 F)
1977	32.8 C (91.0 F)
1978	33.9 C (93.0 F)
1979	33.3 C (91.9 F)
1980	33.9 C (93.0 F)
1981	33.9 C (93.0 F)
1982	35.0 C (95.0 F)
1983	35.6 C (96.1 F)
1984	32.8 C (91.0 F)
1985	32.8 C (91.0 F)
1986	33.9 C (93.0 F)
1987	31.7 C (89.1 F)
1988	33.3 C (91.9 F)
1989	35.0 C (95.0 F)
1990	36.7 C (98.1 F)
1991	35.0 C (95.0 F)
1992	33.3 C (91.9 F)
1993	35.0 C (95.0 F)
1994	33.9 C (93.0 F)
1999	33.9 C (93.0 F)
2000	35.0 C (95.0 F)
2001	36.7 C (98.1 F)
2002	35.0 C (95.0 F)

Coldest night (TNn)

The coldest night of the year at Paso del Cuarenta I, 1941 to 2002. The record is -7.2 C (19.0 F) in 1955, marked on the chart; the median year is -3.3 C (26.1 F).

Coldest night (TNn) at Paso del Cuarenta I by year
Year	Coldest night (TNn)
1941	-3.3 C (26.1 F)
1942	-2.2 C (28.0 F)
1943	-3.3 C (26.1 F)
1944	-2.2 C (28.0 F)
1945	-3.9 C (25.0 F)
1946	-4.4 C (24.1 F)
1947	0.0 C (32.0 F)
1948	-2.2 C (28.0 F)
1949	-2.2 C (28.0 F)
1950	-5.0 C (23.0 F)
1951	-3.9 C (25.0 F)
1952	-4.4 C (24.1 F)
1953	-1.1 C (30.0 F)
1954	0.0 C (32.0 F)
1955	-7.2 C (19.0 F)
1956	-3.3 C (26.1 F)
1957	-1.7 C (28.9 F)
1958	0.0 C (32.0 F)
1959	-2.8 C (27.0 F)
1960	-5.0 C (23.0 F)
1961	-4.4 C (24.1 F)
1962	-6.7 C (19.9 F)
1963	-5.0 C (23.0 F)
1964	-3.3 C (26.1 F)
1965	-3.3 C (26.1 F)
1966	-4.4 C (24.1 F)
1967	-6.1 C (21.0 F)
1968	0.0 C (32.0 F)
1969	0.0 C (32.0 F)
1970	-4.4 C (24.1 F)
1971	-4.4 C (24.1 F)
1972	-3.9 C (25.0 F)
1973	-5.0 C (23.0 F)
1974	-2.8 C (27.0 F)
1975	-6.7 C (19.9 F)
1976	-6.7 C (19.9 F)
1977	-4.4 C (24.1 F)
1978	-5.0 C (23.0 F)
1979	-3.9 C (25.0 F)
1980	-2.2 C (28.0 F)
1981	-3.9 C (25.0 F)
1982	-2.2 C (28.0 F)
1983	-5.0 C (23.0 F)
1984	-2.2 C (28.0 F)
1985	-3.3 C (26.1 F)
1986	-5.0 C (23.0 F)
1987	-3.9 C (25.0 F)
1988	-6.7 C (19.9 F)
1989	-3.9 C (25.0 F)
1990	-1.1 C (30.0 F)
1991	0.6 C (33.1 F)
1992	-2.2 C (28.0 F)
1993	-5.0 C (23.0 F)
1994	-3.3 C (26.1 F)
1999	-3.3 C (26.1 F)
2000	-2.2 C (28.0 F)
2001	-2.2 C (28.0 F)
2002	-2.8 C (27.0 F)

Wettest day (Rx1day)

The wettest day of the year at Paso del Cuarenta I, 1941 to 2002. The record is 123.2 mm (4.9 in) in 2001, marked on the chart; the median year is 40.3 mm (1.6 in).

Wettest day (Rx1day) at Paso del Cuarenta I by year
Year	Wettest day (Rx1day)
1941	58.9 mm (2.3 in)
1942	52.8 mm (2.1 in)
1943	23.9 mm (0.9 in)
1944	71.1 mm (2.8 in)
1945	45.7 mm (1.8 in)
1946	90.4 mm (3.6 in)
1947	39.9 mm (1.6 in)
1948	37.8 mm (1.5 in)
1949	33.0 mm (1.3 in)
1950	37.6 mm (1.5 in)
1951	47.0 mm (1.9 in)
1952	39.4 mm (1.6 in)
1953	45.7 mm (1.8 in)
1954	30.0 mm (1.2 in)
1955	35.8 mm (1.4 in)
1956	31.0 mm (1.2 in)
1957	61.5 mm (2.4 in)
1958	40.4 mm (1.6 in)
1959	37.3 mm (1.5 in)
1960	29.7 mm (1.2 in)
1961	38.9 mm (1.5 in)
1962	51.3 mm (2.0 in)
1963	71.6 mm (2.8 in)
1964	28.4 mm (1.1 in)
1965	37.1 mm (1.5 in)
1966	82.8 mm (3.3 in)
1967	40.1 mm (1.6 in)
1968	36.1 mm (1.4 in)
1969	33.8 mm (1.3 in)
1970	41.9 mm (1.6 in)
1971	68.6 mm (2.7 in)
1972	43.9 mm (1.7 in)
1973	49.8 mm (2.0 in)
1974	39.9 mm (1.6 in)
1975	62.5 mm (2.5 in)
1976	95.3 mm (3.8 in)
1977	38.6 mm (1.5 in)
1978	68.6 mm (2.7 in)
1979	34.3 mm (1.4 in)
1980	68.6 mm (2.7 in)
1981	38.1 mm (1.5 in)
1982	40.1 mm (1.6 in)
1983	40.9 mm (1.6 in)
1984	57.2 mm (2.3 in)
1985	38.6 mm (1.5 in)
1986	42.4 mm (1.7 in)
1987	33.5 mm (1.3 in)
1988	70.1 mm (2.8 in)
1989	16.3 mm (0.6 in)
1990	31.8 mm (1.3 in)
1991	50.8 mm (2.0 in)
1992	31.8 mm (1.3 in)
1993	36.3 mm (1.4 in)
1994	91.2 mm (3.6 in)
1999	30.7 mm (1.2 in)
2000	40.4 mm (1.6 in)
2001	123.2 mm (4.9 in)
2002	45.0 mm (1.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Paso del Cuarenta I, 1941 to 2002. The record is 195.1 mm (7.7 in) in 1971, marked on the chart; the median year is 85.9 mm (3.4 in).

Wettest five days (Rx5day) at Paso del Cuarenta I by year
Year	Wettest five days (Rx5day)
1941	146.6 mm (5.8 in)
1942	63.0 mm (2.5 in)
1943	55.8 mm (2.2 in)
1944	167.4 mm (6.6 in)
1945	83.3 mm (3.3 in)
1946	158.2 mm (6.2 in)
1947	95.3 mm (3.8 in)
1948	69.3 mm (2.7 in)
1949	52.6 mm (2.1 in)
1950	92.3 mm (3.6 in)
1951	108.2 mm (4.3 in)
1952	73.0 mm (2.9 in)
1953	96.3 mm (3.8 in)
1954	64.0 mm (2.5 in)
1955	57.4 mm (2.3 in)
1956	65.7 mm (2.6 in)
1957	118.6 mm (4.7 in)
1958	78.1 mm (3.1 in)
1959	79.5 mm (3.1 in)
1960	72.6 mm (2.9 in)
1961	94.8 mm (3.7 in)
1962	79.5 mm (3.1 in)
1963	132.9 mm (5.2 in)
1964	79.9 mm (3.1 in)
1965	69.4 mm (2.7 in)
1966	122.4 mm (4.8 in)
1967	97.0 mm (3.8 in)
1968	79.1 mm (3.1 in)
1969	49.4 mm (1.9 in)
1970	86.4 mm (3.4 in)
1971	195.1 mm (7.7 in)
1972	90.0 mm (3.5 in)
1973	95.5 mm (3.8 in)
1974	57.4 mm (2.3 in)
1975	94.0 mm (3.7 in)
1976	174.8 mm (6.9 in)
1977	56.4 mm (2.2 in)
1978	127.8 mm (5.0 in)
1979	69.4 mm (2.7 in)
1980	83.1 mm (3.3 in)
1981	83.6 mm (3.3 in)
1982	98.0 mm (3.9 in)
1983	103.2 mm (4.1 in)
1984	95.4 mm (3.8 in)
1985	86.7 mm (3.4 in)
1986	85.3 mm (3.4 in)
1987	77.4 mm (3.0 in)
1988	122.7 mm (4.8 in)
1989	20.9 mm (0.8 in)
1990	99.3 mm (3.9 in)
1991	152.2 mm (6.0 in)
1992	63.5 mm (2.5 in)
1993	68.2 mm (2.7 in)
1994	152.2 mm (6.0 in)
1999	33.0 mm (1.3 in)
2000	70.4 mm (2.8 in)
2001	174.3 mm (6.9 in)
2002	129.9 mm (5.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Paso del Cuarenta I, 1941 to 2002. The record is 158 days in 1953, marked on the chart; the median year is 68 days.

Longest dry spell (CDD) at Paso del Cuarenta I by year
Year	Longest dry spell (CDD)
1941	77 days
1942	44 days
1943	119 days
1944	52 days
1945	81 days
1946	50 days
1947	103 days
1948	51 days
1949	97 days
1950	109 days
1951	117 days
1952	95 days
1953	158 days
1954	109 days
1955	131 days
1956	52 days
1957	67 days
1958	82 days
1959	59 days
1960	99 days
1961	93 days
1962	70 days
1963	58 days
1964	41 days
1965	45 days
1966	73 days
1967	45 days
1968	35 days
1969	51 days
1970	97 days
1971	79 days
1972	65 days
1973	76 days
1974	69 days
1975	92 days
1976	90 days
1977	108 days
1978	45 days
1979	108 days
1980	68 days
1981	36 days
1982	54 days
1983	124 days
1984	90 days
1985	66 days
1986	69 days
1987	53 days
1988	60 days
1989	51 days
1990	20 days
1991	39 days
1992	40 days
1993	70 days
1994	57 days
1999	38 days
2000	49 days
2001	28 days
2002	49 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.

Frost Dates and Growing Season

39 years with a frost

Across 39 years with a frost, the median last spring frost at Paso del Cuarenta I falls on 6 March and the median first autumn frost on 29 November, which leaves a median of 264 days between them.

Fitted over all years, the growing season changes by -1.0 days per decade at this station.

Frost dates and growing season at Paso del Cuarenta I
Measure	Median, all years	Earliest period	Recent period (1957 to 2001)	Recent against earliest	Fitted trend
Last spring frost	6 March	n/a	6 March	n/a	+0.6 days per decade
First autumn frost	29 November	n/a	27 November	n/a	-0.4 days per decade
Growing days	264 days	n/a	264 days	n/a	-1.0 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

48 years, 1941 to 1992

A day with at least 43.1 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 115.7 mm (4.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Paso del Cuarenta I: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	43.1 mm (1.7 in)
5 years	57.2 mm (2.3 in)
10 years	68.4 mm (2.7 in)
25 years	85.0 mm (3.3 in)
50 years	99.3 mm (3.9 in)	Longer than the 48 years of record
100 years	115.7 mm (4.6 in)	Longer than the 48 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, 48 years of values from 1941 to 1992.

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: 95.3 mm (3.8 in) in 1976; 90.4 mm (3.6 in) in 1946; 82.8 mm (3.3 in) in 1966.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

Data for Paso del Cuarenta I standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Paso del Cuarenta I 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).