Calvillo (Smn) Weather Records (MXN00001003)

Record envelope, standing records and threshold days for Calvillo (Smn) (MXN00001003), Mexico, with 57 years of record.

Key Facts for Calvillo (Smn)

Calvillo (Smn) (MXN00001003) is a weather station in Mexico at 21.88 latitude and -102.72 longitude, 1,640 m (5,380 ft) above sea level.
The station reports from 1932 to 1988, 57 years of record.
1,464 records set at Calvillo (Smn) still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Calvillo (Smn) tied a daily record high maximum temperature of 30.0 C (86.0 F) on 26 December 1988.

About the Station

Location: Mexico, 21.88 latitude, -102.72 longitude.
Elevation: 1,640 m (5,380 ft).
Period of record: 1932 to 1988, 57 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 Calvillo (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 Calvillo (Smn), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	33.9 C (93.0 F)	-5.0 C (23.0 F)	n/a	n/a
Feb	35.6 C (96.1 F)	-3.9 C (25.0 F)	n/a	n/a
Mar	38.9 C (102.0 F)	-0.6 C (30.9 F)	n/a	n/a
Apr	42.8 C (109.0 F)	0.6 C (33.1 F)	n/a	n/a
May	40.6 C (105.1 F)	5.0 C (41.0 F)	n/a	n/a
Jun	42.8 C (109.0 F)	7.2 C (45.0 F)	n/a	n/a
Jul	37.2 C (99.0 F)	7.8 C (46.0 F)	n/a	n/a
Aug	36.7 C (98.1 F)	7.8 C (46.0 F)	n/a	n/a
Sep	37.2 C (99.0 F)	6.7 C (44.1 F)	n/a	n/a
Oct	40.0 C (104.0 F)	2.8 C (37.0 F)	n/a	n/a
Nov	35.6 C (96.1 F)	-1.7 C (28.9 F)	n/a	n/a
Dec	35.0 C (95.0 F)	-3.9 C (25.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Calvillo (Smn) still stand. 1980 holds the most, with 83.

Standing records at Calvillo (Smn) by the year they were set
Year set	Standing records
1932	13
1933	31
1934	36
1935	32
1936	23
1937	28
1938	26
1939	27
1940	23
1941	39
1942	25
1943	34
1944	43
1945	38
1946	26
1947	27
1948	16
1949	20
1954	11
1955	26
1956	19
1957	47
1958	39
1959	22
1960	37
1961	23
1962	24
1963	22
1964	19
1965	15
1966	21
1967	47
1968	24
1969	15
1970	21
1971	5
1972	25
1973	36
1974	10
1975	19
1976	25
1977	16
1978	14
1979	38
1980	83
1981	56
1982	57
1983	20
1984	15
1985	13
1986	22
1987	39
1988	32

All-Time Record Progression

6 new records

6 all-time records were set at Calvillo (Smn) between 1 September 1968 and 6 September 1986. Each dot is a new record.

When Calvillo (Smn) set new all-time records
Date	Kind	Detail
1968-09-01	Record daily precipitation	Record daily precipitation 66.3 mm (2.6 in)
1973-10-31	Record daily precipitation	Record daily precipitation 74.7 mm (2.9 in)
1981-06-07	Record high maximum temperature	Record high maximum temperature 41.1 C (106.0 F)
1981-06-08	Record high maximum temperature	Record high maximum temperature 41.7 C (107.1 F)
1981-06-10	Record high maximum temperature	Record high maximum temperature 42.8 C (109.0 F)
1986-09-06	Record daily precipitation	Record daily precipitation 99.8 mm (3.9 in)

Wettest Day of Each Month

Sep: 99.8 mm (3.9 in)

The wettest day on record for each calendar month at Calvillo (Smn). The most was 99.8 mm (3.9 in) on 6 September 1986.

Record daily precipitation for each month at Calvillo (Smn)
Month	Record daily precipitation (mm)	Date
Jan	34.8 mm (1.4 in)	4 January 1948
Feb	21.3 mm (0.8 in)	23 February 1970
Mar	34.8 mm (1.4 in)	4 March 1968
Apr	39.6 mm (1.6 in)	13 April 1959
May	39.6 mm (1.6 in)	27 May 1946
Jun	60.5 mm (2.4 in)	26 June 1988
Jul	62.0 mm (2.4 in)	19 July 1967
Aug	58.9 mm (2.3 in)	20 August 1936
Sep	99.8 mm (3.9 in)	6 September 1986
Oct	74.7 mm (2.9 in)	31 October 1973
Nov	43.7 mm (1.7 in)	2 November 1958
Dec	40.9 mm (1.6 in)	2 December 1979

Period of Record Coverage

1932 to 1988

53 years of record at Calvillo (Smn), 1932 to 1988. 5 years have data for under 90 percent of days and are left out of rankings: 1932, 1965, 1971, 1974, 1979.

Days with data per year at Calvillo (Smn)
Year	Days with data	Share of year	Complete
1932	141	39%	No
1933	365	100%	Yes
1934	365	100%	Yes
1935	365	100%	Yes
1936	366	100%	Yes
1937	365	100%	Yes
1938	365	100%	Yes
1939	364	100%	Yes
1940	365	100%	Yes
1941	365	100%	Yes
1942	365	100%	Yes
1943	365	100%	Yes
1944	366	100%	Yes
1945	364	100%	Yes
1946	365	100%	Yes
1947	365	100%	Yes
1948	366	100%	Yes
1949	365	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	366	100%	Yes
1957	364	100%	Yes
1958	365	100%	Yes
1959	363	99%	Yes
1960	335	92%	Yes
1961	363	99%	Yes
1962	364	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	304	83%	No
1966	332	91%	Yes
1967	365	100%	Yes
1968	335	92%	Yes
1969	364	100%	Yes
1970	364	100%	Yes
1971	212	58%	No
1972	366	100%	Yes
1973	345	95%	Yes
1974	180	49%	No
1975	360	99%	Yes
1976	365	100%	Yes
1977	364	100%	Yes
1978	364	100%	Yes
1979	212	58%	No
1980	365	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	364	100%	Yes
1984	365	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	366	100%	Yes

Latest Records

Latest records at Calvillo (Smn)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
26 December 1988	Calvillo (Smn), MX	daily high max (Tie)	30.0 C (86.0 F)	tie	40 years	4 of 100 (Routine)
25 December 1988	Calvillo (Smn), MX	daily high max	31.7 C (89.1 F)	1.1 C (2.0 F)	16 years	12 of 100 (Routine)
24 December 1988	Calvillo (Smn), MX	daily high max	32.8 C (91.0 F)	1.1 C (2.0 F)	4 years	9 of 100 (Routine)
23 December 1988	Calvillo (Smn), MX	daily high max	30.6 C (87.1 F)	0.6 C (1.1 F)	40 years	19 of 100 (Routine)
19 December 1988	Calvillo (Smn), MX	daily high max (Tie)	30.6 C (87.1 F)	tie	40 years	4 of 100 (Routine)
17 December 1988	Calvillo (Smn), MX	daily high max (Tie)	30.0 C (86.0 F)	tie	40 years	4 of 100 (Routine)
16 December 1988	Calvillo (Smn), MX	daily high max	32.8 C (91.0 F)	1.1 C (2.0 F)	2 years	8 of 100 (Routine)
15 December 1988	Calvillo (Smn), MX	daily high max (Tie)	31.7 C (89.1 F)	tie	8 years	1 of 100 (Routine)
13 December 1988	Calvillo (Smn), MX	daily high max (Tie)	30.0 C (86.0 F)	tie	9 years	1 of 100 (Routine)
30 November 1988	Calvillo (Smn), MX	daily high max (Tie)	31.7 C (89.1 F)	tie	9 years	1 of 100 (Routine)
16 November 1988	Calvillo (Smn), MX	daily high max (Tie)	35.0 C (95.0 F)	tie	2 years	1 of 100 (Routine)
14 November 1988	Calvillo (Smn), MX	daily high max	33.9 C (93.0 F)	2.2 C (4.0 F)	50 years	27 of 100 (Routine)
13 November 1988	Calvillo (Smn), MX	daily high max (Tie)	33.3 C (91.9 F)	tie	50 years	5 of 100 (Routine)
12 November 1988	Calvillo (Smn), MX	daily high max	33.9 C (93.0 F)	1.1 C (2.0 F)	9 years	10 of 100 (Routine)
11 November 1988	Calvillo (Smn), MX	daily high max	33.9 C (93.0 F)	1.1 C (2.0 F)	16 years	12 of 100 (Routine)
10 November 1988	Calvillo (Smn), MX	daily high max	35.0 C (95.0 F)	1.1 C (2.0 F)	16 years	12 of 100 (Routine)
9 November 1988	Calvillo (Smn), MX	daily high max	34.4 C (93.9 F)	0.5 C (0.9 F)	7 years	8 of 100 (Routine)
8 November 1988	Calvillo (Smn), MX	daily high max (Tie)	33.9 C (93.0 F)	tie	16 years	2 of 100 (Routine)
7 November 1988	Calvillo (Smn), MX	daily high max (Tie)	33.9 C (93.0 F)	tie	9 years	1 of 100 (Routine)
2 November 1988	Calvillo (Smn), MX	daily high max (Tie)	32.8 C (91.0 F)	tie	34 years	3 of 100 (Routine)

Climate Trend

44 complete years, 1933 to 1988

One stripe for each of 44 complete years at Calvillo (Smn), 1933 to 1988. Blue stripes are years cooler than the station's own mean of 20.0 C (68.0 F); red stripes are warmer. The coolest year was 1967, at 18.7 C (65.7 F), and the warmest was 1981, at 21.6 C (70.9 F). The strongest colour marks a difference of 1.7 C (3.1 F).

Annual mean temperature at Calvillo (Smn) as warming stripes, 1933 to 1988
Year	Annual mean temperature	Difference from the station mean
1933	20.0 C	+0.03 C
1934	19.5 C	-0.49 C
1935	19.4 C	-0.65 C
1936	20.3 C	+0.26 C
1937	20.1 C	+0.12 C
1938	19.9 C	-0.10 C
1939	19.9 C	-0.10 C
1940	20.0 C	+0.04 C
1941	20.1 C	+0.13 C
1942	20.2 C	+0.22 C
1943	19.9 C	-0.14 C
1944	19.6 C	-0.44 C
1945	20.1 C	+0.07 C
1946	20.4 C	+0.43 C
1947	19.8 C	-0.20 C
1948	20.0 C	-0.02 C
1949	20.7 C	+0.65 C
1954	20.6 C	+0.56 C
1955	20.0 C	+0.03 C
1956	19.9 C	-0.08 C
1957	20.8 C	+0.77 C
1958	19.8 C	-0.21 C
1959	19.9 C	-0.14 C
1961	20.0 C	+0.00 C
1962	20.2 C	+0.24 C
1963	20.0 C	+0.03 C
1964	19.3 C	-0.66 C
1967	18.7 C	-1.26 C
1969	19.7 C	-0.26 C
1970	19.7 C	-0.35 C
1972	20.0 C	+0.04 C
1975	19.5 C	-0.53 C
1976	19.1 C	-0.91 C
1977	19.7 C	-0.31 C
1978	20.1 C	+0.07 C
1980	19.9 C	-0.07 C
1981	21.6 C	+1.61 C
1982	21.0 C	+1.04 C
1983	19.6 C	-0.36 C
1984	19.6 C	-0.42 C
1985	19.7 C	-0.32 C
1986	20.2 C	+0.18 C
1987	20.4 C	+0.43 C
1988	20.9 C	+0.90 C

The fitted trend in annual mean temperature here over 1933 to 1988 is 0.03 C (-0.06 to 0.12) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.2) per decade. The slope is a straight line fitted to 44 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Calvillo (Smn)
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.03 C (-0.06 to 0.12) per decade	0.1 F (-0.1 to 0.2) per decade	1933 to 1988	44	Not clearly different from zero
Mean daily maximum	0.2 C (0.1 to 0.3) per decade	0.4 F (0.1 to 0.6) per decade	1933 to 1988	44	Rise
Mean daily minimum	-0.2 C (-0.2 to -0.1) per decade	-0.3 F (-0.4 to -0.1) per decade	1933 to 1988	44	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

1932 to 1988

Yearly extremes at Calvillo (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)	1981	37.8 C (100.0 F)	53
Coldest night (TNn)	-5.0 C (23.0 F)	1955	-0.6 C (30.9 F)	53
Wettest day (Rx1day)	99.8 mm (3.9 in)	1986	45.5 mm (1.8 in)	53
Wettest five days (Rx5day)	153.4 mm (6.0 in)	1945	91.0 mm (3.6 in)	53
Longest dry spell (CDD)	165 days	1960	74 days	53

Hottest day (TXx)

The hottest day of the year at Calvillo (Smn), 1932 to 1988. The record is 42.8 C (109.0 F) in 1981, marked on the chart; the median year is 37.8 C (100.0 F).

Hottest day (TXx) at Calvillo (Smn) by year
Year	Hottest day (TXx)
1932	32.8 C (91.0 F)
1933	37.8 C (100.0 F)
1934	36.7 C (98.1 F)
1935	36.7 C (98.1 F)
1936	40.0 C (104.0 F)
1937	37.2 C (99.0 F)
1938	37.8 C (100.0 F)
1939	36.1 C (97.0 F)
1940	37.2 C (99.0 F)
1941	37.8 C (100.0 F)
1942	38.3 C (100.9 F)
1943	39.4 C (102.9 F)
1944	36.7 C (98.1 F)
1945	37.8 C (100.0 F)
1946	37.8 C (100.0 F)
1947	36.1 C (97.0 F)
1948	37.2 C (99.0 F)
1949	38.9 C (102.0 F)
1954	37.8 C (100.0 F)
1955	37.8 C (100.0 F)
1956	37.2 C (99.0 F)
1957	38.3 C (100.9 F)
1958	36.7 C (98.1 F)
1959	36.1 C (97.0 F)
1960	37.8 C (100.0 F)
1961	37.8 C (100.0 F)
1962	37.8 C (100.0 F)
1963	39.4 C (102.9 F)
1964	36.7 C (98.1 F)
1965	37.8 C (100.0 F)
1966	37.8 C (100.0 F)
1967	37.8 C (100.0 F)
1968	37.8 C (100.0 F)
1969	36.7 C (98.1 F)
1970	38.9 C (102.0 F)
1971	32.8 C (91.0 F)
1972	38.9 C (102.0 F)
1973	40.0 C (104.0 F)
1974	33.9 C (93.0 F)
1975	37.8 C (100.0 F)
1976	37.2 C (99.0 F)
1977	36.7 C (98.1 F)
1978	38.3 C (100.9 F)
1979	40.0 C (104.0 F)
1980	37.8 C (100.0 F)
1981	42.8 C (109.0 F)
1982	42.8 C (109.0 F)
1983	38.9 C (102.0 F)
1984	35.6 C (96.1 F)
1985	37.8 C (100.0 F)
1986	40.6 C (105.1 F)
1987	38.9 C (102.0 F)
1988	39.4 C (102.9 F)

Coldest night (TNn)

The coldest night of the year at Calvillo (Smn), 1932 to 1988. The record is -5.0 C (23.0 F) in 1955, marked on the chart; the median year is -0.6 C (30.9 F).

Coldest night (TNn) at Calvillo (Smn) by year
Year	Coldest night (TNn)
1932	0.6 C (33.1 F)
1933	1.1 C (34.0 F)
1934	1.1 C (34.0 F)
1935	-2.8 C (27.0 F)
1936	-0.6 C (30.9 F)
1937	0.0 C (32.0 F)
1938	1.1 C (34.0 F)
1939	-0.6 C (30.9 F)
1940	-3.3 C (26.1 F)
1941	-2.2 C (28.0 F)
1942	-2.2 C (28.0 F)
1943	0.6 C (33.1 F)
1944	-3.9 C (25.0 F)
1945	0.6 C (33.1 F)
1946	0.0 C (32.0 F)
1947	0.6 C (33.1 F)
1948	0.6 C (33.1 F)
1949	1.1 C (34.0 F)
1954	0.6 C (33.1 F)
1955	-5.0 C (23.0 F)
1956	-1.7 C (28.9 F)
1957	1.1 C (34.0 F)
1958	0.0 C (32.0 F)
1959	0.6 C (33.1 F)
1960	-3.9 C (25.0 F)
1961	1.1 C (34.0 F)
1962	-1.7 C (28.9 F)
1963	-1.1 C (30.0 F)
1964	0.6 C (33.1 F)
1965	-1.1 C (30.0 F)
1966	-1.1 C (30.0 F)
1967	-3.9 C (25.0 F)
1968	-2.2 C (28.0 F)
1969	0.0 C (32.0 F)
1970	-1.7 C (28.9 F)
1971	-2.2 C (28.0 F)
1972	0.0 C (32.0 F)
1973	-1.1 C (30.0 F)
1974	-1.1 C (30.0 F)
1975	-2.2 C (28.0 F)
1976	-2.8 C (27.0 F)
1977	1.7 C (35.1 F)
1978	-1.1 C (30.0 F)
1979	-1.1 C (30.0 F)
1980	1.1 C (34.0 F)
1981	-0.6 C (30.9 F)
1982	1.7 C (35.1 F)
1983	-1.7 C (28.9 F)
1984	-0.6 C (30.9 F)
1985	-3.3 C (26.1 F)
1986	-1.1 C (30.0 F)
1987	1.7 C (35.1 F)
1988	-2.2 C (28.0 F)

Wettest day (Rx1day)

The wettest day of the year at Calvillo (Smn), 1932 to 1988. The record is 99.8 mm (3.9 in) in 1986, marked on the chart; the median year is 45.5 mm (1.8 in).

Wettest day (Rx1day) at Calvillo (Smn) by year
Year	Wettest day (Rx1day)
1932	26.9 mm (1.1 in)
1933	46.2 mm (1.8 in)
1934	41.1 mm (1.6 in)
1935	49.3 mm (1.9 in)
1936	58.9 mm (2.3 in)
1937	40.6 mm (1.6 in)
1938	39.4 mm (1.6 in)
1939	39.1 mm (1.5 in)
1940	59.9 mm (2.4 in)
1941	52.8 mm (2.1 in)
1942	45.5 mm (1.8 in)
1943	44.5 mm (1.8 in)
1944	28.4 mm (1.1 in)
1945	49.5 mm (1.9 in)
1946	39.6 mm (1.6 in)
1947	51.3 mm (2.0 in)
1948	35.3 mm (1.4 in)
1949	38.1 mm (1.5 in)
1954	47.2 mm (1.9 in)
1955	43.4 mm (1.7 in)
1956	56.1 mm (2.2 in)
1957	39.1 mm (1.5 in)
1958	50.5 mm (2.0 in)
1959	52.3 mm (2.1 in)
1960	32.5 mm (1.3 in)
1961	42.4 mm (1.7 in)
1962	64.3 mm (2.5 in)
1963	47.5 mm (1.9 in)
1964	38.4 mm (1.5 in)
1965	37.8 mm (1.5 in)
1966	50.8 mm (2.0 in)
1967	62.0 mm (2.4 in)
1968	66.3 mm (2.6 in)
1969	31.0 mm (1.2 in)
1970	42.9 mm (1.7 in)
1971	35.3 mm (1.4 in)
1972	52.1 mm (2.1 in)
1973	74.7 mm (2.9 in)
1974	32.8 mm (1.3 in)
1975	59.4 mm (2.3 in)
1976	38.9 mm (1.5 in)
1977	47.0 mm (1.9 in)
1978	39.9 mm (1.6 in)
1979	40.9 mm (1.6 in)
1980	54.9 mm (2.2 in)
1981	31.0 mm (1.2 in)
1982	53.3 mm (2.1 in)
1983	35.3 mm (1.4 in)
1984	39.9 mm (1.6 in)
1985	46.0 mm (1.8 in)
1986	99.8 mm (3.9 in)
1987	55.4 mm (2.2 in)
1988	60.5 mm (2.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Calvillo (Smn), 1932 to 1988. The record is 153.4 mm (6.0 in) in 1945, marked on the chart; the median year is 91.0 mm (3.6 in).

Wettest five days (Rx5day) at Calvillo (Smn) by year
Year	Wettest five days (Rx5day)
1932	26.9 mm (1.1 in)
1933	76.2 mm (3.0 in)
1934	71.1 mm (2.8 in)
1935	127.5 mm (5.0 in)
1936	102.7 mm (4.0 in)
1937	96.0 mm (3.8 in)
1938	73.4 mm (2.9 in)
1939	96.0 mm (3.8 in)
1940	105.1 mm (4.1 in)
1941	114.7 mm (4.5 in)
1942	107.6 mm (4.2 in)
1943	93.1 mm (3.7 in)
1944	71.1 mm (2.8 in)
1945	153.4 mm (6.0 in)
1946	64.5 mm (2.5 in)
1947	72.9 mm (2.9 in)
1948	108.2 mm (4.3 in)
1949	62.6 mm (2.5 in)
1954	51.4 mm (2.0 in)
1955	71.1 mm (2.8 in)
1956	121.3 mm (4.8 in)
1957	56.6 mm (2.2 in)
1958	75.1 mm (3.0 in)
1959	77.2 mm (3.0 in)
1960	67.6 mm (2.7 in)
1961	81.7 mm (3.2 in)
1962	102.1 mm (4.0 in)
1963	105.9 mm (4.2 in)
1964	74.5 mm (2.9 in)
1965	72.1 mm (2.8 in)
1966	94.7 mm (3.7 in)
1967	90.9 mm (3.6 in)
1968	111.7 mm (4.4 in)
1969	74.7 mm (2.9 in)
1970	99.8 mm (3.9 in)
1971	88.2 mm (3.5 in)
1972	61.8 mm (2.4 in)
1973	138.2 mm (5.4 in)
1974	59.7 mm (2.4 in)
1975	95.9 mm (3.8 in)
1976	113.4 mm (4.5 in)
1977	94.2 mm (3.7 in)
1978	66.3 mm (2.6 in)
1979	75.7 mm (3.0 in)
1980	95.8 mm (3.8 in)
1981	62.8 mm (2.5 in)
1982	122.4 mm (4.8 in)
1983	76.5 mm (3.0 in)
1984	112.6 mm (4.4 in)
1985	101.2 mm (4.0 in)
1986	128.0 mm (5.0 in)
1987	91.0 mm (3.6 in)
1988	116.9 mm (4.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Calvillo (Smn), 1932 to 1988. The record is 165 days in 1960, marked on the chart; the median year is 74 days.

Longest dry spell (CDD) at Calvillo (Smn) by year
Year	Longest dry spell (CDD)
1932	69 days
1933	112 days
1934	59 days
1935	48 days
1936	74 days
1937	90 days
1938	73 days
1939	71 days
1940	64 days
1941	46 days
1942	80 days
1943	149 days
1944	58 days
1945	117 days
1946	50 days
1947	63 days
1948	37 days
1949	123 days
1954	76 days
1955	153 days
1956	74 days
1957	80 days
1958	73 days
1959	59 days
1960	165 days
1961	42 days
1962	69 days
1963	58 days
1964	72 days
1965	54 days
1966	45 days
1967	46 days
1968	49 days
1969	149 days
1970	98 days
1971	76 days
1972	76 days
1973	120 days
1974	54 days
1975	113 days
1976	136 days
1977	80 days
1978	81 days
1979	70 days
1980	57 days
1981	87 days
1982	137 days
1983	74 days
1984	98 days
1985	83 days
1986	111 days
1987	93 days
1988	162 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

48 years, 1933 to 1988

A day with at least 46.1 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 87.9 mm (3.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Calvillo (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	46.1 mm (1.8 in)
5 years	56.9 mm (2.2 in)
10 years	64.2 mm (2.5 in)
25 years	73.7 mm (2.9 in)
50 years	80.8 mm (3.2 in)	Longer than the 48 years of record
100 years	87.9 mm (3.5 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 1933 to 1988.

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: 99.8 mm (3.9 in) in 1986; 74.7 mm (2.9 in) in 1973; 66.3 mm (2.6 in) in 1968.

Download the Data

Data for Calvillo (Smn) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Calvillo (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 2026-10-16 (16 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).