Guanacevi (Smn) Weather Records (MXN00010029)

Record envelope, standing records and threshold days for Guanacevi (Smn) (MXN00010029), Mexico, with 88 years of record.

Key Facts for Guanacevi (Smn)

Guanacevi (Smn) (MXN00010029) is a weather station in Mexico at 25.92 latitude and -105.95 longitude, 2,099 m (6,886 ft) above sea level.
The station reports from 1922 to 2009, 88 years of record.
1,464 records set at Guanacevi (Smn) still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Guanacevi (Smn) set a daily record low maximum temperature of 16.7 C (62.1 F) on 5 October 2008.

About the Station

Location: Mexico, 25.92 latitude, -105.95 longitude.
Elevation: 2,099 m (6,886 ft).
Period of record: 1922 to 2009, 88 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 Guanacevi (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 Guanacevi (Smn), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	27.8 C (82.0 F)	-12.2 C (10.0 F)	n/a	n/a
Feb	30.0 C (86.0 F)	-9.4 C (15.1 F)	n/a	n/a
Mar	31.7 C (89.1 F)	-7.8 C (18.0 F)	n/a	n/a
Apr	35.0 C (95.0 F)	-3.3 C (26.1 F)	n/a	n/a
May	38.9 C (102.0 F)	0.0 C (32.0 F)	n/a	n/a
Jun	38.9 C (102.0 F)	3.3 C (37.9 F)	n/a	n/a
Jul	36.7 C (98.1 F)	4.4 C (39.9 F)	n/a	n/a
Aug	37.8 C (100.0 F)	2.8 C (37.0 F)	n/a	n/a
Sep	33.3 C (91.9 F)	1.7 C (35.1 F)	n/a	n/a
Oct	30.6 C (87.1 F)	-5.0 C (23.0 F)	n/a	n/a
Nov	28.9 C (84.0 F)	-7.8 C (18.0 F)	n/a	n/a
Dec	28.9 C (84.0 F)	-10.0 C (14.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Guanacevi (Smn) still stand. 1952 holds the most, with 76.

Standing records at Guanacevi (Smn) by the year they were set
Year set	Standing records
1922	12
1923	20
1924	18
1925	20
1926	17
1927	29
1928	24
1929	14
1930	15
1931	13
1932	14
1933	20
1934	16
1935	65
1936	21
1937	20
1938	18
1939	32
1940	43
1941	15
1942	18
1943	10
1944	17
1945	18
1946	7
1947	22
1948	16
1949	15
1950	20
1951	24
1952	76
1953	29
1954	11
1956	13
1957	34
1958	12
1959	15
1960	17
1961	12
1962	11
1963	28
1964	5
1965	10
1966	6
1967	24
1968	18
1969	20
1970	12
1971	9
1972	5
1973	16
1974	6
1975	8
1976	17
1977	10
1978	12
1979	10
1980	11
1981	9
1982	12
1983	8
1984	8
1985	4
1986	7
1987	11
1988	3
1989	11
1990	5
1991	13
1992	7
1993	7
1994	5
1995	4
1996	12
1997	32
1998	45
1999	30
2000	18
2001	19
2002	4
2003	67
2004	1
2005	7
2006	13
2007	18
2008	14

All-Time Record Progression

4 new records

4 all-time records were set at Guanacevi (Smn) between 7 May 1952 and 18 January 1997. Each dot is a new record.

When Guanacevi (Smn) set new all-time records
Date	Kind	Detail
1952-05-07	Record high maximum temperature	Record high maximum temperature 36.7 C (98.1 F)
1952-05-08	Record high maximum temperature	Record high maximum temperature 38.9 C (102.0 F)
1969-06-29	Record high minimum temperature	Record high minimum temperature 20.6 C (69.1 F)
1997-01-18	Record low minimum temperature	Record low minimum temperature -12.2 C (10.0 F)

Wettest Day of Each Month

Sep: 84.1 mm (3.3 in)

The wettest day on record for each calendar month at Guanacevi (Smn). The most was 84.1 mm (3.3 in) on 21 September 1928.

Record daily precipitation for each month at Guanacevi (Smn)
Month	Record daily precipitation (mm)	Date
Jan	53.3 mm (2.1 in)	4 January 1960
Feb	39.6 mm (1.6 in)	14 February 1931
Mar	59.9 mm (2.4 in)	16 March 1930
Apr	45.5 mm (1.8 in)	27 April 1934
May	32.3 mm (1.3 in)	27 May 1934
Jun	43.2 mm (1.7 in)	16 June 1943
Jul	63.8 mm (2.5 in)	12 July 1950
Aug	58.9 mm (2.3 in)	1 August 1979
Sep	84.1 mm (3.3 in)	21 September 1928
Oct	52.8 mm (2.1 in)	5 October 1981
Nov	41.9 mm (1.6 in)	6 November 1974
Dec	52.8 mm (2.1 in)	12 December 1984

Period of Record Coverage

1922 to 2009

88 years of record at Guanacevi (Smn), 1922 to 2009. 15 years have data for under 90 percent of days and are left out of rankings: 1922, 1955, 1988, 1995, 1996, 1997, 1998, 2001 and others.

Days with data per year at Guanacevi (Smn)
Year	Days with data	Share of year	Complete
1922	209	57%	No
1923	365	100%	Yes
1924	365	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	366	100%	Yes
1937	365	100%	Yes
1938	365	100%	Yes
1939	365	100%	Yes
1940	366	100%	Yes
1941	365	100%	Yes
1942	365	100%	Yes
1943	365	100%	Yes
1944	365	100%	Yes
1945	365	100%	Yes
1946	365	100%	Yes
1947	365	100%	Yes
1948	366	100%	Yes
1949	365	100%	Yes
1950	365	100%	Yes
1951	365	100%	Yes
1952	366	100%	Yes
1953	364	100%	Yes
1954	334	92%	Yes
1955	31	8%	No
1956	366	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	363	99%	Yes
1967	364	100%	Yes
1968	366	100%	Yes
1969	357	98%	Yes
1970	364	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	364	100%	Yes
1975	363	99%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	364	100%	Yes
1980	363	99%	Yes
1981	361	99%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	305	83%	No
1989	365	100%	Yes
1990	365	100%	Yes
1991	354	97%	Yes
1992	366	100%	Yes
1993	361	99%	Yes
1994	365	100%	Yes
1995	304	83%	No
1996	285	78%	No
1997	303	83%	No
1998	318	87%	No
1999	360	99%	Yes
2000	338	92%	Yes
2001	273	75%	No
2002	327	90%	No
2003	365	100%	Yes
2004	196	54%	No
2005	324	89%	No
2006	284	78%	No
2007	319	87%	No
2008	292	80%	No
2009	30	8%	No

Latest Records

Latest records at Guanacevi (Smn)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
5 October 2008	Guanacevi (Smn), MX	daily low max	16.7 C (62.1 F)	2.2 C (4.0 F)	44 years	28 of 100 (Routine)
4 October 2008	Guanacevi (Smn), MX	daily low max	17.8 C (64.0 F)	0.5 C (0.9 F)	75 years	31 of 100 (Routine)
25 September 2008	Guanacevi (Smn), MX	daily low max	13.9 C (57.0 F)	2.8 C (5.0 F)	64 years	35 of 100 (Notable)
24 September 2008	Guanacevi (Smn), MX	daily rain	32.8 mm (1.3 in)	6.9 mm (0.27 in)	24 years	21 of 100 (Routine)
17 September 2008	Guanacevi (Smn), MX	daily low min	5.0 C (41.0 F)	0.6 C (1.1 F)	76 years	32 of 100 (Routine)
15 September 2008	Guanacevi (Smn), MX	daily rain (Tie)	34.8 mm (1.4 in)	tie	12 years	2 of 100 (Routine)
8 September 2008	Guanacevi (Smn), MX	daily rain	39.9 mm (1.6 in)	8.9 mm (0.35 in)	50 years	31 of 100 (Routine)
30 August 2008	Guanacevi (Smn), MX	daily low max	18.9 C (66.0 F)	1.1 C (2.0 F)	70 years	32 of 100 (Routine)
30 August 2008	Guanacevi (Smn), MX	daily rain	34.8 mm (1.4 in)	1.8 mm (0.07 in)	68 years	29 of 100 (Routine)
26 August 2008	Guanacevi (Smn), MX	daily low min (Tie)	7.8 C (46.0 F)	tie	82 years	8 of 100 (Routine)
25 August 2008	Guanacevi (Smn), MX	daily low max	18.9 C (66.0 F)	1.1 C (2.0 F)	38 years	22 of 100 (Routine)
23 August 2008	Guanacevi (Smn), MX	daily low min (Tie)	7.8 C (46.0 F)	tie	69 years	7 of 100 (Routine)
8 August 2008	Guanacevi (Smn), MX	daily low min	7.8 C (46.0 F)	1.1 C (2.0 F)	75 years	36 of 100 (Notable)
7 August 2008	Guanacevi (Smn), MX	daily low min (Tie)	7.8 C (46.0 F)	tie	69 years	7 of 100 (Routine)
1 July 2008	Guanacevi (Smn), MX	daily low min	5.6 C (42.1 F)	2.2 C (4.0 F)	69 years	40 of 100 (Notable)
23 May 2008	Guanacevi (Smn), MX	daily low min (Tie)	3.9 C (39.0 F)	tie	68 years	7 of 100 (Routine)
15 May 2008	Guanacevi (Smn), MX	daily low min	1.7 C (35.1 F)	1.1 C (2.0 F)	5 years	13 of 100 (Routine)
15 May 2008	Guanacevi (Smn), MX	daily rain	6.4 mm (0.25 in)	1.6 mm (0.06 in)	3 years	11 of 100 (Routine)
4 May 2008	Guanacevi (Smn), MX	daily low min	2.8 C (37.0 F)	0.5 C (0.9 F)	55 years	25 of 100 (Routine)
2 May 2008	Guanacevi (Smn), MX	daily low min (Tie)	3.9 C (39.0 F)	tie	5 years	2 of 100 (Routine)

Climate Trend

72 complete years, 1923 to 2003

One stripe for each of 72 complete years at Guanacevi (Smn), 1923 to 2003. Blue stripes are years cooler than the station's own mean of 14.9 C (58.9 F); red stripes are warmer. The coolest year was 1935, at 13.7 C (56.7 F), and the warmest was 1999, at 17.0 C (62.7 F). The strongest colour marks a difference of 2.2 C (4.0 F).

Annual mean temperature at Guanacevi (Smn) as warming stripes, 1923 to 2003
Year	Annual mean temperature	Difference from the station mean
1923	15.3 C	+0.35 C
1924	14.8 C	-0.11 C
1925	15.4 C	+0.45 C
1926	14.9 C	+0.00 C
1927	15.8 C	+0.83 C
1928	15.1 C	+0.13 C
1929	15.0 C	+0.07 C
1930	14.8 C	-0.15 C
1931	14.4 C	-0.50 C
1932	14.2 C	-0.72 C
1933	14.1 C	-0.81 C
1934	14.0 C	-0.89 C
1935	13.7 C	-1.22 C
1936	14.7 C	-0.22 C
1937	14.9 C	-0.07 C
1938	14.4 C	-0.51 C
1939	13.7 C	-1.21 C
1940	14.0 C	-0.94 C
1941	15.3 C	+0.42 C
1942	15.3 C	+0.38 C
1943	15.0 C	+0.09 C
1944	14.7 C	-0.24 C
1945	15.7 C	+0.75 C
1946	15.4 C	+0.47 C
1947	14.6 C	-0.37 C
1948	15.6 C	+0.66 C
1949	15.0 C	+0.11 C
1950	15.5 C	+0.57 C
1951	15.9 C	+0.94 C
1952	16.5 C	+1.61 C
1953	15.1 C	+0.20 C
1956	15.1 C	+0.13 C
1957	15.5 C	+0.53 C
1958	14.9 C	-0.02 C
1959	15.2 C	+0.30 C
1960	15.1 C	+0.20 C
1961	14.7 C	-0.27 C
1962	15.2 C	+0.29 C
1963	14.4 C	-0.56 C
1964	14.4 C	-0.54 C
1965	14.5 C	-0.40 C
1966	14.4 C	-0.49 C
1967	14.5 C	-0.46 C
1968	14.5 C	-0.41 C
1969	15.4 C	+0.43 C
1970	14.7 C	-0.20 C
1971	14.7 C	-0.23 C
1972	15.0 C	+0.11 C
1973	14.6 C	-0.36 C
1974	14.8 C	-0.09 C
1975	14.6 C	-0.33 C
1976	14.2 C	-0.68 C
1977	14.6 C	-0.28 C
1978	15.2 C	+0.26 C
1979	14.9 C	+0.01 C
1980	15.5 C	+0.58 C
1981	14.8 C	-0.13 C
1982	15.7 C	+0.76 C
1983	14.4 C	-0.54 C
1984	14.1 C	-0.81 C
1985	14.6 C	-0.36 C
1986	14.7 C	-0.23 C
1987	14.3 C	-0.58 C
1989	15.4 C	+0.44 C
1990	14.9 C	+0.01 C
1991	15.1 C	+0.18 C
1992	14.3 C	-0.60 C
1993	15.1 C	+0.15 C
1994	15.4 C	+0.50 C
1999	17.0 C	+2.11 C
2000	16.6 C	+1.68 C
2003	14.5 C	-0.39 C

The fitted trend in annual mean temperature here over 1923 to 2003 is 0.04 C (-0.03 to 0.10) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.07 F (-0.05 to 0.19) per decade. The slope is a straight line fitted to 72 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Guanacevi (Smn)
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.04 C (-0.03 to 0.10) per decade	0.07 F (-0.05 to 0.19) per decade	1923 to 2003	72	Not clearly different from zero
Mean daily maximum	0.06 C (-0.04 to 0.17) per decade	0.1 F (-0.1 to 0.3) per decade	1923 to 2003	72	Not clearly different from zero
Mean daily minimum	0.02 C (-0.07 to 0.10) per decade	0.03 F (-0.13 to 0.18) per decade	1923 to 2003	72	Not clearly different from zero

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 2009

Yearly extremes at Guanacevi (Smn): 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)	1952	32.8 C (91.0 F)	88
Coldest night (TNn)	-12.2 C (10.0 F)	1997	-6.1 C (21.0 F)	88
Wettest day (Rx1day)	84.1 mm (3.3 in)	1928	39.9 mm (1.6 in)	88
Wettest five days (Rx5day)	163.1 mm (6.4 in)	1998	84.7 mm (3.3 in)	88
Longest dry spell (CDD)	162 days	1995	60 days	88

Hottest day (TXx)

The hottest day of the year at Guanacevi (Smn), 1922 to 2009. The record is 38.9 C (102.0 F) in 1952, marked on the chart; the median year is 32.8 C (91.0 F).

Hottest day (TXx) at Guanacevi (Smn) by year
Year	Hottest day (TXx)
1922	32.8 C (91.0 F)
1923	32.8 C (91.0 F)
1924	31.7 C (89.1 F)
1925	32.8 C (91.0 F)
1926	31.1 C (88.0 F)
1927	33.3 C (91.9 F)
1928	33.3 C (91.9 F)
1929	33.3 C (91.9 F)
1930	31.1 C (88.0 F)
1931	30.0 C (86.0 F)
1932	35.0 C (95.0 F)
1933	32.8 C (91.0 F)
1934	33.3 C (91.9 F)
1935	31.1 C (88.0 F)
1936	33.9 C (93.0 F)
1937	35.6 C (96.1 F)
1938	32.2 C (90.0 F)
1939	33.9 C (93.0 F)
1940	32.2 C (90.0 F)
1941	31.7 C (89.1 F)
1942	33.9 C (93.0 F)
1943	31.1 C (88.0 F)
1944	35.0 C (95.0 F)
1945	33.3 C (91.9 F)
1946	31.1 C (88.0 F)
1947	32.8 C (91.0 F)
1948	31.7 C (89.1 F)
1949	33.3 C (91.9 F)
1950	31.1 C (88.0 F)
1951	34.4 C (93.9 F)
1952	38.9 C (102.0 F)
1953	32.2 C (90.0 F)
1954	33.9 C (93.0 F)
1955	23.9 C (75.0 F)
1956	31.7 C (89.1 F)
1957	33.9 C (93.0 F)
1958	32.8 C (91.0 F)
1959	32.8 C (91.0 F)
1960	32.8 C (91.0 F)
1961	32.8 C (91.0 F)
1962	35.6 C (96.1 F)
1963	31.7 C (89.1 F)
1964	30.6 C (87.1 F)
1965	32.8 C (91.0 F)
1966	32.8 C (91.0 F)
1967	31.7 C (89.1 F)
1968	32.8 C (91.0 F)
1969	35.0 C (95.0 F)
1970	32.8 C (91.0 F)
1971	31.7 C (89.1 F)
1972	31.7 C (89.1 F)
1973	32.8 C (91.0 F)
1974	32.8 C (91.0 F)
1975	31.7 C (89.1 F)
1976	35.6 C (96.1 F)
1977	30.6 C (87.1 F)
1978	31.7 C (89.1 F)
1979	32.8 C (91.0 F)
1980	35.6 C (96.1 F)
1981	35.0 C (95.0 F)
1982	36.7 C (98.1 F)
1983	35.0 C (95.0 F)
1984	35.0 C (95.0 F)
1985	32.8 C (91.0 F)
1986	32.8 C (91.0 F)
1987	35.0 C (95.0 F)
1988	31.7 C (89.1 F)
1989	37.8 C (100.0 F)
1990	33.9 C (93.0 F)
1991	35.0 C (95.0 F)
1992	35.0 C (95.0 F)
1993	31.7 C (89.1 F)
1994	35.0 C (95.0 F)
1995	35.0 C (95.0 F)
1996	33.3 C (91.9 F)
1997	31.7 C (89.1 F)
1998	36.1 C (97.0 F)
1999	33.9 C (93.0 F)
2000	32.8 C (91.0 F)
2001	33.9 C (93.0 F)
2002	33.9 C (93.0 F)
2003	37.8 C (100.0 F)
2004	30.6 C (87.1 F)
2005	32.8 C (91.0 F)
2006	35.0 C (95.0 F)
2007	30.0 C (86.0 F)
2008	35.0 C (95.0 F)
2009	17.8 C (64.0 F)

Coldest night (TNn)

The coldest night of the year at Guanacevi (Smn), 1922 to 2009. The record is -12.2 C (10.0 F) in 1997, marked on the chart; the median year is -6.1 C (21.0 F).

Coldest night (TNn) at Guanacevi (Smn) by year
Year	Coldest night (TNn)
1922	-1.1 C (30.0 F)
1923	-6.1 C (21.0 F)
1924	-6.1 C (21.0 F)
1925	-8.3 C (17.1 F)
1926	-7.2 C (19.0 F)
1927	-3.9 C (25.0 F)
1928	-5.0 C (23.0 F)
1929	-7.8 C (18.0 F)
1930	-5.6 C (21.9 F)
1931	-6.1 C (21.0 F)
1932	-8.9 C (16.0 F)
1933	-9.4 C (15.1 F)
1934	-9.4 C (15.1 F)
1935	-11.7 C (10.9 F)
1936	-6.7 C (19.9 F)
1937	-5.0 C (23.0 F)
1938	-7.2 C (19.0 F)
1939	-7.2 C (19.0 F)
1940	-9.4 C (15.1 F)
1941	-6.7 C (19.9 F)
1942	-8.3 C (17.1 F)
1943	-3.9 C (25.0 F)
1944	-8.9 C (16.0 F)
1945	-6.1 C (21.0 F)
1946	-8.3 C (17.1 F)
1947	-10.0 C (14.0 F)
1948	-6.1 C (21.0 F)
1949	-11.1 C (12.0 F)
1950	-5.0 C (23.0 F)
1951	-9.4 C (15.1 F)
1952	-6.1 C (21.0 F)
1953	-10.0 C (14.0 F)
1954	-4.4 C (24.1 F)
1955	-3.9 C (25.0 F)
1956	-9.4 C (15.1 F)
1957	-6.1 C (21.0 F)
1958	-10.0 C (14.0 F)
1959	-7.2 C (19.0 F)
1960	-7.8 C (18.0 F)
1961	-6.7 C (19.9 F)
1962	-10.0 C (14.0 F)
1963	-8.3 C (17.1 F)
1964	-7.2 C (19.0 F)
1965	-8.3 C (17.1 F)
1966	-6.1 C (21.0 F)
1967	-7.2 C (19.0 F)
1968	-4.4 C (24.1 F)
1969	-6.1 C (21.0 F)
1970	-6.1 C (21.0 F)
1971	-6.1 C (21.0 F)
1972	-3.3 C (26.1 F)
1973	-6.1 C (21.0 F)
1974	-6.1 C (21.0 F)
1975	-9.4 C (15.1 F)
1976	-4.4 C (24.1 F)
1977	-3.3 C (26.1 F)
1978	-4.4 C (24.1 F)
1979	-6.1 C (21.0 F)
1980	-3.3 C (26.1 F)
1981	-5.0 C (23.0 F)
1982	-4.4 C (24.1 F)
1983	-5.0 C (23.0 F)
1984	-5.0 C (23.0 F)
1985	-7.2 C (19.0 F)
1986	-5.0 C (23.0 F)
1987	-6.1 C (21.0 F)
1988	-7.2 C (19.0 F)
1989	-5.0 C (23.0 F)
1990	-6.1 C (21.0 F)
1991	-5.0 C (23.0 F)
1992	-5.0 C (23.0 F)
1993	-4.4 C (24.1 F)
1994	-5.0 C (23.0 F)
1995	-5.0 C (23.0 F)
1996	-8.3 C (17.1 F)
1997	-12.2 C (10.0 F)
1998	-5.0 C (23.0 F)
1999	-5.0 C (23.0 F)
2000	-5.0 C (23.0 F)
2001	-3.9 C (25.0 F)
2002	-4.4 C (24.1 F)
2003	-5.0 C (23.0 F)
2004	-4.4 C (24.1 F)
2005	-4.4 C (24.1 F)
2006	-8.3 C (17.1 F)
2007	-8.3 C (17.1 F)
2008	-9.4 C (15.1 F)
2009	-5.0 C (23.0 F)

Wettest day (Rx1day)

The wettest day of the year at Guanacevi (Smn), 1922 to 2009. The record is 84.1 mm (3.3 in) in 1928, marked on the chart; the median year is 39.9 mm (1.6 in).

Wettest day (Rx1day) at Guanacevi (Smn) by year
Year	Wettest day (Rx1day)
1922	39.9 mm (1.6 in)
1923	37.3 mm (1.5 in)
1924	34.8 mm (1.4 in)
1925	45.5 mm (1.8 in)
1926	35.3 mm (1.4 in)
1927	45.7 mm (1.8 in)
1928	84.1 mm (3.3 in)
1929	29.5 mm (1.2 in)
1930	59.9 mm (2.4 in)
1931	39.9 mm (1.6 in)
1932	41.7 mm (1.6 in)
1933	32.8 mm (1.3 in)
1934	45.5 mm (1.8 in)
1935	51.3 mm (2.0 in)
1936	39.1 mm (1.5 in)
1937	37.1 mm (1.5 in)
1938	26.4 mm (1.0 in)
1939	35.8 mm (1.4 in)
1940	35.1 mm (1.4 in)
1941	33.8 mm (1.3 in)
1942	40.4 mm (1.6 in)
1943	56.9 mm (2.2 in)
1944	56.1 mm (2.2 in)
1945	40.9 mm (1.6 in)
1946	45.0 mm (1.8 in)
1947	47.0 mm (1.9 in)
1948	49.8 mm (2.0 in)
1949	33.8 mm (1.3 in)
1950	63.8 mm (2.5 in)
1951	36.8 mm (1.4 in)
1952	26.9 mm (1.1 in)
1953	62.0 mm (2.4 in)
1954	30.0 mm (1.2 in)
1955	0.0 mm (0.00 in)
1956	26.9 mm (1.1 in)
1957	24.9 mm (1.0 in)
1958	41.9 mm (1.6 in)
1959	26.9 mm (1.1 in)
1960	53.3 mm (2.1 in)
1961	27.9 mm (1.1 in)
1962	29.0 mm (1.1 in)
1963	41.9 mm (1.6 in)
1964	35.3 mm (1.4 in)
1965	32.8 mm (1.3 in)
1966	30.2 mm (1.2 in)
1967	39.9 mm (1.6 in)
1968	64.8 mm (2.6 in)
1969	27.9 mm (1.1 in)
1970	51.3 mm (2.0 in)
1971	27.9 mm (1.1 in)
1972	39.9 mm (1.6 in)
1973	33.3 mm (1.3 in)
1974	41.9 mm (1.6 in)
1975	38.9 mm (1.5 in)
1976	36.8 mm (1.4 in)
1977	63.5 mm (2.5 in)
1978	36.8 mm (1.4 in)
1979	58.9 mm (2.3 in)
1980	37.8 mm (1.5 in)
1981	52.8 mm (2.1 in)
1982	50.8 mm (2.0 in)
1983	30.0 mm (1.2 in)
1984	62.0 mm (2.4 in)
1985	37.8 mm (1.5 in)
1986	43.9 mm (1.7 in)
1987	39.9 mm (1.6 in)
1988	48.8 mm (1.9 in)
1989	38.9 mm (1.5 in)
1990	35.8 mm (1.4 in)
1991	41.9 mm (1.6 in)
1992	47.0 mm (1.9 in)
1993	34.8 mm (1.4 in)
1994	19.8 mm (0.8 in)
1995	37.3 mm (1.5 in)
1996	34.8 mm (1.4 in)
1997	45.0 mm (1.8 in)
1998	41.4 mm (1.6 in)
1999	40.9 mm (1.6 in)
2000	37.8 mm (1.5 in)
2001	55.9 mm (2.2 in)
2002	46.0 mm (1.8 in)
2003	31.8 mm (1.3 in)
2004	48.8 mm (1.9 in)
2005	51.8 mm (2.0 in)
2006	47.8 mm (1.9 in)
2007	31.8 mm (1.3 in)
2008	39.9 mm (1.6 in)
2009	6.9 mm (0.27 in)

Wettest five days (Rx5day)

The wettest five days of the year at Guanacevi (Smn), 1922 to 2009. The record is 163.1 mm (6.4 in) in 1998, marked on the chart; the median year is 84.7 mm (3.3 in).

Wettest five days (Rx5day) at Guanacevi (Smn) by year
Year	Wettest five days (Rx5day)
1922	90.9 mm (3.6 in)
1923	84.8 mm (3.3 in)
1924	59.6 mm (2.3 in)
1925	97.3 mm (3.8 in)
1926	87.1 mm (3.4 in)
1927	92.2 mm (3.6 in)
1928	134.1 mm (5.3 in)
1929	75.3 mm (3.0 in)
1930	96.2 mm (3.8 in)
1931	83.9 mm (3.3 in)
1932	88.3 mm (3.5 in)
1933	81.3 mm (3.2 in)
1934	45.5 mm (1.8 in)
1935	63.7 mm (2.5 in)
1936	85.3 mm (3.4 in)
1937	95.1 mm (3.7 in)
1938	96.8 mm (3.8 in)
1939	96.3 mm (3.8 in)
1940	75.6 mm (3.0 in)
1941	79.0 mm (3.1 in)
1942	131.4 mm (5.2 in)
1943	129.5 mm (5.1 in)
1944	95.0 mm (3.7 in)
1945	86.4 mm (3.4 in)
1946	68.3 mm (2.7 in)
1947	103.9 mm (4.1 in)
1948	84.5 mm (3.3 in)
1949	80.3 mm (3.2 in)
1950	72.9 mm (2.9 in)
1951	62.0 mm (2.4 in)
1952	61.4 mm (2.4 in)
1953	67.8 mm (2.7 in)
1954	74.2 mm (2.9 in)
1955	0.0 mm (0.00 in)
1956	57.1 mm (2.2 in)
1957	58.2 mm (2.3 in)
1958	92.7 mm (3.6 in)
1959	62.9 mm (2.5 in)
1960	151.7 mm (6.0 in)
1961	62.5 mm (2.5 in)
1962	41.7 mm (1.6 in)
1963	81.3 mm (3.2 in)
1964	67.6 mm (2.7 in)
1965	46.6 mm (1.8 in)
1966	89.6 mm (3.5 in)
1967	89.0 mm (3.5 in)
1968	138.5 mm (5.5 in)
1969	50.8 mm (2.0 in)
1970	114.3 mm (4.5 in)
1971	78.5 mm (3.1 in)
1972	63.8 mm (2.5 in)
1973	93.2 mm (3.7 in)
1974	60.0 mm (2.4 in)
1975	81.3 mm (3.2 in)
1976	75.0 mm (3.0 in)
1977	83.1 mm (3.3 in)
1978	69.1 mm (2.7 in)
1979	146.0 mm (5.7 in)
1980	89.9 mm (3.5 in)
1981	127.5 mm (5.0 in)
1982	66.8 mm (2.6 in)
1983	48.3 mm (1.9 in)
1984	116.9 mm (4.6 in)
1985	60.4 mm (2.4 in)
1986	101.3 mm (4.0 in)
1987	124.8 mm (4.9 in)
1988	98.6 mm (3.9 in)
1989	82.8 mm (3.3 in)
1990	90.5 mm (3.6 in)
1991	82.3 mm (3.2 in)
1992	89.2 mm (3.5 in)
1993	74.2 mm (2.9 in)
1994	37.9 mm (1.5 in)
1995	63.2 mm (2.5 in)
1996	126.5 mm (5.0 in)
1997	153.0 mm (6.0 in)
1998	163.1 mm (6.4 in)
1999	162.1 mm (6.4 in)
2000	105.1 mm (4.1 in)
2001	106.1 mm (4.2 in)
2002	91.1 mm (3.6 in)
2003	70.3 mm (2.8 in)
2004	92.3 mm (3.6 in)
2005	67.5 mm (2.7 in)
2006	101.6 mm (4.0 in)
2007	94.1 mm (3.7 in)
2008	96.5 mm (3.8 in)
2009	6.9 mm (0.27 in)

Longest dry spell (CDD)

The longest dry spell of the year at Guanacevi (Smn), 1922 to 2009. The record is 162 days in 1995, marked on the chart; the median year is 60 days.

Longest dry spell (CDD) at Guanacevi (Smn) by year
Year	Longest dry spell (CDD)
1922	37 days
1923	40 days
1924	67 days
1925	84 days
1926	34 days
1927	47 days
1928	45 days
1929	79 days
1930	40 days
1931	37 days
1932	83 days
1933	69 days
1934	68 days
1935	60 days
1936	60 days
1937	158 days
1938	109 days
1939	115 days
1940	45 days
1941	39 days
1942	39 days
1943	76 days
1944	47 days
1945	116 days
1946	84 days
1947	45 days
1948	69 days
1949	77 days
1950	88 days
1951	93 days
1952	81 days
1953	92 days
1954	148 days
1955	31 days
1956	119 days
1957	46 days
1958	39 days
1959	125 days
1960	135 days
1961	70 days
1962	102 days
1963	51 days
1964	60 days
1965	56 days
1966	74 days
1967	40 days
1968	30 days
1969	32 days
1970	35 days
1971	30 days
1972	31 days
1973	24 days
1974	36 days
1975	33 days
1976	33 days
1977	30 days
1978	41 days
1979	41 days
1980	25 days
1981	30 days
1982	46 days
1983	29 days
1984	100 days
1985	45 days
1986	82 days
1987	56 days
1988	96 days
1989	53 days
1990	76 days
1991	76 days
1992	43 days
1993	85 days
1994	73 days
1995	162 days
1996	69 days
1997	28 days
1998	113 days
1999	76 days
2000	116 days
2001	51 days
2002	112 days
2003	88 days
2004	42 days
2005	103 days
2006	89 days
2007	67 days
2008	62 days
2009	26 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

72 years with a frost

Across 72 years with a frost, the median last spring frost at Guanacevi (Smn) falls on 22 March and the median first autumn frost on 17 November, which leaves a median of 239 days between them.

In 1967 to 2003 the median growing season was 249 days. That is 18 days more than in 1923 to 1952.

Fitted over all years, the growing season changes by +4.7 days per decade at this station.

Frost dates and growing season at Guanacevi (Smn)
Measure	Median, all years	Earliest period (1923 to 1952)	Recent period (1967 to 2003)	Recent against earliest	Fitted trend
Last spring frost	22 March	31 March	13 March	18 days earlier	-3.2 days per decade
First autumn frost	17 November	15 November	21 November	6 days later	+1.5 days per decade
Growing days	239 days	231 days	249 days	18 days more	+4.7 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

67 years, 1923 to 2004

A day with at least 39.3 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 78.5 mm (3.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Guanacevi (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	39.3 mm (1.5 in)
5 years	49.5 mm (1.9 in)
10 years	56.4 mm (2.2 in)
25 years	65.2 mm (2.6 in)
50 years	71.8 mm (2.8 in)
100 years	78.5 mm (3.1 in)	Longer than the 67 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, 67 years of values from 1923 to 2004.

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: 84.1 mm (3.3 in) in 1928; 64.8 mm (2.6 in) in 1968; 63.8 mm (2.5 in) in 1950.

Download the Data

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