Sonoita Weather Records (MXN00026096)

Record envelope, standing records and threshold days for Sonoita (MXN00026096), Mexico, with 66 years of record.

Key Facts for Sonoita

Sonoita (MXN00026096) is a weather station in Mexico at 31.85 latitude and -112.85 longitude, 389 m (1,276 ft) above sea level.
The station reports from 1948 to 2013, 66 years of record.
1,464 records set at Sonoita still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Sonoita tied a daily record low minimum temperature of 10.6 C (51.1 F) on 29 September 2013.

About the Station

Location: Mexico, 31.85 latitude, -112.85 longitude.
Elevation: 389 m (1,276 ft).
Period of record: 1948 to 2013, 66 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 Sonoita. 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 Sonoita, 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)	-8.9 C (16.0 F)	n/a	n/a
Feb	33.3 C (91.9 F)	-6.7 C (19.9 F)	n/a	n/a
Mar	39.4 C (102.9 F)	-2.2 C (28.0 F)	n/a	n/a
Apr	41.1 C (106.0 F)	1.1 C (34.0 F)	n/a	n/a
May	45.0 C (113.0 F)	2.8 C (37.0 F)	n/a	n/a
Jun	48.3 C (118.9 F)	8.9 C (48.0 F)	n/a	n/a
Jul	48.9 C (120.0 F)	13.9 C (57.0 F)	n/a	n/a
Aug	47.2 C (117.0 F)	11.1 C (52.0 F)	n/a	n/a
Sep	45.0 C (113.0 F)	9.4 C (48.9 F)	n/a	n/a
Oct	41.7 C (107.1 F)	-0.6 C (30.9 F)	n/a	n/a
Nov	35.6 C (96.1 F)	-5.0 C (23.0 F)	n/a	n/a
Dec	30.0 C (86.0 F)	-10.0 C (14.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Sonoita still stand. 1949 holds the most, with 56.

Standing records at Sonoita by the year they were set
Year set	Standing records
1948	2
1949	56
1950	22
1951	10
1952	28
1953	28
1954	4
1955	42
1956	31
1957	26
1958	23
1959	21
1960	38
1961	27
1962	25
1963	25
1964	22
1965	34
1966	15
1967	45
1968	20
1969	22
1970	7
1971	56
1972	19
1973	15
1974	18
1975	14
1976	17
1977	22
1978	16
1979	21
1980	31
1981	19
1982	18
1983	14
1984	17
1985	32
1986	29
1987	24
1988	20
1989	33
1990	33
1991	18
1992	21
1993	18
1994	13
1995	33
1996	22
1997	23
1998	14
1999	19
2000	19
2001	18
2002	18
2003	15
2004	21
2005	12
2006	23
2007	20
2008	18
2009	21
2010	13
2011	19
2012	15
2013	10

All-Time Record Progression

6 new records

6 all-time records were set at Sonoita between 24 August 1985 and 21 January 2010. Each dot is a new record.

When Sonoita set new all-time records
Date	Kind	Detail
1985-08-24	Record high maximum temperature	Record high maximum temperature 47.2 C (117.0 F)
1988-12-28	Record low minimum temperature	Record low minimum temperature -10.0 C (14.0 F)
1990-06-26	Record high maximum temperature	Record high maximum temperature 48.3 C (118.9 F)
2001-07-02	Record high maximum temperature	Record high maximum temperature 48.9 C (120.0 F)
2003-07-15	Record high minimum temperature	Record high minimum temperature 31.7 C (89.1 F)
2010-01-21	Record daily precipitation	Record daily precipitation 130.3 mm (5.1 in)

Wettest Day of Each Month

Jan: 130.3 mm (5.1 in)

The wettest day on record for each calendar month at Sonoita. The most was 130.3 mm (5.1 in) on 21 January 2010.

Record daily precipitation for each month at Sonoita
Month	Record daily precipitation (mm)	Date
Jan	130.3 mm (5.1 in)	21 January 2010
Feb	30.7 mm (1.2 in)	17 February 1998
Mar	47.0 mm (1.9 in)	17 March 1963
Apr	43.9 mm (1.7 in)	2 April 2004
May	8.6 mm (0.34 in)	19 May 1979
Jun	12.4 mm (0.5 in)	25 June 1984
Jul	71.6 mm (2.8 in)	14 July 1996
Aug	79.0 mm (3.1 in)	14 August 1961
Sep	57.9 mm (2.3 in)	13 September 1962
Oct	58.4 mm (2.3 in)	14 October 1988
Nov	35.3 mm (1.4 in)	30 November 2007
Dec	62.7 mm (2.5 in)	1 December 1983

Period of Record Coverage

1948 to 2013

66 years of record at Sonoita, 1948 to 2013. 8 years have data for under 90 percent of days and are left out of rankings: 1948, 1949, 1950, 1951, 1960, 1962, 2005, 2013.

Days with data per year at Sonoita
Year	Days with data	Share of year	Complete
1948	49	13%	No
1949	315	86%	No
1950	161	44%	No
1951	216	59%	No
1952	335	92%	Yes
1953	365	100%	Yes
1954	334	92%	Yes
1955	365	100%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	328	90%	No
1961	365	100%	Yes
1962	316	87%	No
1963	364	100%	Yes
1964	365	100%	Yes
1965	360	99%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	358	98%	Yes
1970	363	99%	Yes
1971	360	99%	Yes
1972	365	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	364	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	364	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	366	100%	Yes
1989	365	100%	Yes
1990	365	100%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	365	100%	Yes
1996	366	100%	Yes
1997	365	100%	Yes
1998	365	100%	Yes
1999	365	100%	Yes
2000	365	100%	Yes
2001	365	100%	Yes
2002	365	100%	Yes
2003	364	100%	Yes
2004	366	100%	Yes
2005	274	75%	No
2006	365	100%	Yes
2007	364	100%	Yes
2008	366	100%	Yes
2009	365	100%	Yes
2010	365	100%	Yes
2011	365	100%	Yes
2012	366	100%	Yes
2013	272	75%	No

Latest Records

Latest records at Sonoita
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 September 2013	Sonoita, MX	daily low min (Tie)	10.6 C (51.1 F)	tie	48 years	5 of 100 (Routine)
28 September 2013	Sonoita, MX	daily low min	10.0 C (50.0 F)	2.2 C (4.0 F)	27 years	20 of 100 (Routine)
23 September 2013	Sonoita, MX	daily low min (Tie)	12.8 C (55.0 F)	tie	24 years	3 of 100 (Routine)
29 August 2013	Sonoita, MX	daily low max	30.0 C (86.0 F)	1.7 C (3.1 F)	12 years	14 of 100 (Routine)
29 August 2013	Sonoita, MX	daily rain	9.4 mm (0.37 in)	3.0 mm (0.12 in)	16 years	13 of 100 (Routine)
28 August 2013	Sonoita, MX	daily rain	68.3 mm (2.7 in)	59.9 mm (2.4 in)	4 years	47 of 100 (Notable)
24 August 2013	Sonoita, MX	daily rain	22.9 mm (0.9 in)	13.5 mm (0.5 in)	12 years	20 of 100 (Routine)
19 August 2013	Sonoita, MX	daily high min (Tie)	27.2 C (81.0 F)	tie	18 years	2 of 100 (Routine)
18 August 2013	Sonoita, MX	daily high max (Tie)	43.9 C (111.0 F)	tie	60 years	6 of 100 (Routine)
16 August 2013	Sonoita, MX	daily high max (Tie)	43.9 C (111.0 F)	tie	20 years	3 of 100 (Routine)
15 August 2013	Sonoita, MX	daily high max	42.8 C (109.0 F)	1.1 C (2.0 F)	28 years	17 of 100 (Routine)
13 August 2013	Sonoita, MX	daily low min (Tie)	18.3 C (64.9 F)	tie	28 years	3 of 100 (Routine)
28 June 2013	Sonoita, MX	daily high max (Tie)	45.0 C (113.0 F)	tie	19 years	2 of 100 (Routine)
14 March 2013	Sonoita, MX	daily high max	35.0 C (95.0 F)	1.1 C (2.0 F)	6 years	9 of 100 (Routine)
13 March 2013	Sonoita, MX	daily high max (Tie)	33.9 C (93.0 F)	tie	40 years	4 of 100 (Routine)
26 February 2013	Sonoita, MX	daily low min (Tie)	-2.2 C (28.0 F)	tie	53 years	5 of 100 (Routine)
28 January 2013	Sonoita, MX	daily rain	2.3 mm (0.09 in)	0.8 mm (0.03 in)	56 years	20 of 100 (Routine)
27 January 2013	Sonoita, MX	daily high min (Tie)	10.6 C (51.1 F)	tie	44 years	4 of 100 (Routine)
25 January 2013	Sonoita, MX	daily high min	10.6 C (51.1 F)	0.6 C (1.1 F)	44 years	20 of 100 (Routine)
25 January 2013	Sonoita, MX	daily rain	11.9 mm (0.5 in)	5.3 mm (0.21 in)	24 years	17 of 100 (Routine)

Climate Trend

56 complete years, 1953 to 2012

One stripe for each of 56 complete years at Sonoita, 1953 to 2012. Blue stripes are years cooler than the station's own mean of 21.2 C (70.2 F); red stripes are warmer. The coolest year was 1971, at 18.5 C (65.4 F), and the warmest was 1961, at 22.5 C (72.5 F). The strongest colour marks a difference of 2.7 C (4.9 F).

Annual mean temperature at Sonoita as warming stripes, 1953 to 2012
Year	Annual mean temperature	Difference from the station mean
1953	20.7 C	-0.51 C
1955	19.9 C	-1.30 C
1956	20.6 C	-0.58 C
1957	20.9 C	-0.30 C
1958	21.0 C	-0.18 C
1959	20.8 C	-0.41 C
1961	22.5 C	+1.30 C
1963	21.0 C	-0.17 C
1964	19.8 C	-1.37 C
1965	20.4 C	-0.79 C
1966	20.7 C	-0.51 C
1967	20.8 C	-0.38 C
1968	21.1 C	-0.13 C
1969	20.6 C	-0.61 C
1970	20.6 C	-0.62 C
1971	18.5 C	-2.68 C
1972	21.0 C	-0.23 C
1973	20.8 C	-0.40 C
1974	21.2 C	+0.02 C
1975	20.6 C	-0.63 C
1976	21.3 C	+0.08 C
1977	21.4 C	+0.19 C
1978	21.3 C	+0.06 C
1979	20.8 C	-0.46 C
1980	21.8 C	+0.60 C
1981	22.4 C	+1.17 C
1982	20.5 C	-0.68 C
1983	20.9 C	-0.33 C
1984	21.0 C	-0.21 C
1985	21.3 C	+0.08 C
1986	21.9 C	+0.66 C
1987	21.3 C	+0.06 C
1988	21.6 C	+0.36 C
1989	22.1 C	+0.86 C
1990	21.4 C	+0.15 C
1991	21.0 C	-0.17 C
1992	21.5 C	+0.25 C
1993	21.4 C	+0.23 C
1994	21.6 C	+0.40 C
1995	22.0 C	+0.82 C
1996	22.2 C	+1.01 C
1997	21.7 C	+0.52 C
1998	20.8 C	-0.43 C
1999	21.7 C	+0.49 C
2000	22.1 C	+0.89 C
2001	21.9 C	+0.69 C
2002	21.7 C	+0.48 C
2003	21.9 C	+0.71 C
2004	21.5 C	+0.24 C
2006	21.6 C	+0.43 C
2007	21.5 C	+0.31 C
2008	21.4 C	+0.21 C
2009	21.8 C	+0.56 C
2010	21.2 C	-0.05 C
2011	21.2 C	-0.06 C
2012	21.8 C	+0.56 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1953 to 2012. In Fahrenheit: 0.4 F (0.2 to 0.5) per decade. The slope is a straight line fitted to 56 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Sonoita
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.2 C (0.1 to 0.3) per decade	0.4 F (0.2 to 0.5) per decade	1953 to 2012	56	Rise
Mean daily maximum	0.4 C (0.2 to 0.5) per decade	0.6 F (0.4 to 0.9) per decade	1953 to 2012	56	Rise
Mean daily minimum	0.07 C (-0.03 to 0.17) per decade	0.13 F (-0.05 to 0.30) per decade	1953 to 2012	56	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

1948 to 2013

Yearly extremes at Sonoita: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	48.9 C (120.0 F)	2001	45.0 C (113.0 F)	66
Coldest night (TNn)	-10.0 C (14.0 F)	1988	-4.4 C (24.1 F)	66
Wettest day (Rx1day)	130.3 mm (5.1 in)	2010	32.6 mm (1.3 in)	66
Wettest five days (Rx5day)	154.2 mm (6.1 in)	2010	42.3 mm (1.7 in)	66
Longest dry spell (CDD)	212 days	2002	102 days	66

Hottest day (TXx)

The hottest day of the year at Sonoita, 1948 to 2013. The record is 48.9 C (120.0 F) in 2001, marked on the chart; the median year is 45.0 C (113.0 F).

Hottest day (TXx) at Sonoita by year
Year	Hottest day (TXx)
1948	28.9 C (84.0 F)
1949	43.3 C (109.9 F)
1950	45.0 C (113.0 F)
1951	44.4 C (111.9 F)
1952	45.0 C (113.0 F)
1953	44.4 C (111.9 F)
1954	43.9 C (111.0 F)
1955	45.0 C (113.0 F)
1956	45.0 C (113.0 F)
1957	45.0 C (113.0 F)
1958	45.6 C (114.1 F)
1959	43.9 C (111.0 F)
1960	45.0 C (113.0 F)
1961	45.6 C (114.1 F)
1962	45.6 C (114.1 F)
1963	43.3 C (109.9 F)
1964	45.6 C (114.1 F)
1965	43.9 C (111.0 F)
1966	43.3 C (109.9 F)
1967	41.7 C (107.1 F)
1968	43.9 C (111.0 F)
1969	45.0 C (113.0 F)
1970	43.9 C (111.0 F)
1971	41.1 C (106.0 F)
1972	45.0 C (113.0 F)
1973	45.0 C (113.0 F)
1974	46.1 C (115.0 F)
1975	45.0 C (113.0 F)
1976	46.1 C (115.0 F)
1977	43.9 C (111.0 F)
1978	45.6 C (114.1 F)
1979	45.6 C (114.1 F)
1980	45.0 C (113.0 F)
1981	46.1 C (115.0 F)
1982	43.9 C (111.0 F)
1983	46.1 C (115.0 F)
1984	45.0 C (113.0 F)
1985	47.2 C (117.0 F)
1986	45.0 C (113.0 F)
1987	45.0 C (113.0 F)
1988	45.0 C (113.0 F)
1989	46.1 C (115.0 F)
1990	48.3 C (118.9 F)
1991	43.3 C (109.9 F)
1992	45.0 C (113.0 F)
1993	46.1 C (115.0 F)
1994	46.7 C (116.1 F)
1995	48.3 C (118.9 F)
1996	46.7 C (116.1 F)
1997	45.0 C (113.0 F)
1998	47.8 C (118.0 F)
1999	45.6 C (114.1 F)
2000	46.1 C (115.0 F)
2001	48.9 C (120.0 F)
2002	45.0 C (113.0 F)
2003	46.1 C (115.0 F)
2004	44.4 C (111.9 F)
2005	45.6 C (114.1 F)
2006	46.7 C (116.1 F)
2007	45.6 C (114.1 F)
2008	45.0 C (113.0 F)
2009	46.7 C (116.1 F)
2010	46.7 C (116.1 F)
2011	46.7 C (116.1 F)
2012	45.6 C (114.1 F)
2013	45.0 C (113.0 F)

Coldest night (TNn)

The coldest night of the year at Sonoita, 1948 to 2013. The record is -10.0 C (14.0 F) in 1988, marked on the chart; the median year is -4.4 C (24.1 F).

Coldest night (TNn) at Sonoita by year
Year	Coldest night (TNn)
1948	-2.2 C (28.0 F)
1949	-8.3 C (17.1 F)
1950	-6.1 C (21.0 F)
1951	-4.4 C (24.1 F)
1952	-5.0 C (23.0 F)
1953	-5.0 C (23.0 F)
1954	-6.1 C (21.0 F)
1955	-5.0 C (23.0 F)
1956	-2.8 C (27.0 F)
1957	-1.1 C (30.0 F)
1958	-4.4 C (24.1 F)
1959	-6.1 C (21.0 F)
1960	-5.0 C (23.0 F)
1961	0.0 C (32.0 F)
1962	-4.4 C (24.1 F)
1963	-5.6 C (21.9 F)
1964	-5.6 C (21.9 F)
1965	-3.9 C (25.0 F)
1966	-4.4 C (24.1 F)
1967	-4.4 C (24.1 F)
1968	0.0 C (32.0 F)
1969	0.0 C (32.0 F)
1970	-1.1 C (30.0 F)
1971	-6.1 C (21.0 F)
1972	-5.0 C (23.0 F)
1973	-1.1 C (30.0 F)
1974	-3.9 C (25.0 F)
1975	-1.1 C (30.0 F)
1976	-5.0 C (23.0 F)
1977	-1.7 C (28.9 F)
1978	-5.0 C (23.0 F)
1979	-5.0 C (23.0 F)
1980	0.0 C (32.0 F)
1981	-3.3 C (26.1 F)
1982	-2.2 C (28.0 F)
1983	-3.9 C (25.0 F)
1984	-3.3 C (26.1 F)
1985	-5.0 C (23.0 F)
1986	-2.8 C (27.0 F)
1987	-6.7 C (19.9 F)
1988	-10.0 C (14.0 F)
1989	-3.3 C (26.1 F)
1990	-6.7 C (19.9 F)
1991	-2.8 C (27.0 F)
1992	-2.2 C (28.0 F)
1993	-3.3 C (26.1 F)
1994	-2.8 C (27.0 F)
1995	-0.6 C (30.9 F)
1996	-1.7 C (28.9 F)
1997	-2.2 C (28.0 F)
1998	-5.0 C (23.0 F)
1999	-2.2 C (28.0 F)
2000	-3.3 C (26.1 F)
2001	-2.8 C (27.0 F)
2002	-6.7 C (19.9 F)
2003	-4.4 C (24.1 F)
2004	-5.0 C (23.0 F)
2005	-2.8 C (27.0 F)
2006	-4.4 C (24.1 F)
2007	-8.9 C (16.0 F)
2008	-4.4 C (24.1 F)
2009	-2.2 C (28.0 F)
2010	-5.0 C (23.0 F)
2011	-6.1 C (21.0 F)
2012	-1.7 C (28.9 F)
2013	-7.2 C (19.0 F)

Wettest day (Rx1day)

The wettest day of the year at Sonoita, 1948 to 2013. The record is 130.3 mm (5.1 in) in 2010, marked on the chart; the median year is 32.6 mm (1.3 in).

Wettest day (Rx1day) at Sonoita by year
Year	Wettest day (Rx1day)
1948	11.4 mm (0.4 in)
1949	30.0 mm (1.2 in)
1950	17.8 mm (0.7 in)
1951	12.4 mm (0.5 in)
1952	20.8 mm (0.8 in)
1953	16.0 mm (0.6 in)
1954	22.4 mm (0.9 in)
1955	21.3 mm (0.8 in)
1956	16.3 mm (0.6 in)
1957	18.8 mm (0.7 in)
1958	43.9 mm (1.7 in)
1959	44.5 mm (1.8 in)
1960	41.9 mm (1.6 in)
1961	79.0 mm (3.1 in)
1962	57.9 mm (2.3 in)
1963	47.0 mm (1.9 in)
1964	47.0 mm (1.9 in)
1965	39.6 mm (1.6 in)
1966	22.9 mm (0.9 in)
1967	34.8 mm (1.4 in)
1968	15.0 mm (0.6 in)
1969	37.8 mm (1.5 in)
1970	34.8 mm (1.4 in)
1971	23.9 mm (0.9 in)
1972	39.4 mm (1.6 in)
1973	12.2 mm (0.5 in)
1974	37.6 mm (1.5 in)
1975	27.9 mm (1.1 in)
1976	18.8 mm (0.7 in)
1977	29.0 mm (1.1 in)
1978	33.5 mm (1.3 in)
1979	58.9 mm (2.3 in)
1980	13.5 mm (0.5 in)
1981	26.4 mm (1.0 in)
1982	36.1 mm (1.4 in)
1983	62.7 mm (2.5 in)
1984	27.9 mm (1.1 in)
1985	25.9 mm (1.0 in)
1986	38.1 mm (1.5 in)
1987	47.8 mm (1.9 in)
1988	61.5 mm (2.4 in)
1989	31.5 mm (1.2 in)
1990	33.8 mm (1.3 in)
1991	28.2 mm (1.1 in)
1992	63.8 mm (2.5 in)
1993	33.3 mm (1.3 in)
1994	31.8 mm (1.3 in)
1995	29.2 mm (1.1 in)
1996	71.6 mm (2.8 in)
1997	49.5 mm (1.9 in)
1998	30.7 mm (1.2 in)
1999	16.8 mm (0.7 in)
2000	29.0 mm (1.1 in)
2001	23.9 mm (0.9 in)
2002	15.2 mm (0.6 in)
2003	53.8 mm (2.1 in)
2004	43.9 mm (1.7 in)
2005	43.4 mm (1.7 in)
2006	29.5 mm (1.2 in)
2007	35.3 mm (1.4 in)
2008	39.9 mm (1.6 in)
2009	11.7 mm (0.5 in)
2010	130.3 mm (5.1 in)
2011	28.4 mm (1.1 in)
2012	50.8 mm (2.0 in)
2013	68.3 mm (2.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at Sonoita, 1948 to 2013. The record is 154.2 mm (6.1 in) in 2010, marked on the chart; the median year is 42.3 mm (1.7 in).

Wettest five days (Rx5day) at Sonoita by year
Year	Wettest five days (Rx5day)
1948	24.0 mm (0.9 in)
1949	31.8 mm (1.3 in)
1950	18.6 mm (0.7 in)
1951	21.3 mm (0.8 in)
1952	41.7 mm (1.6 in)
1953	18.1 mm (0.7 in)
1954	40.7 mm (1.6 in)
1955	33.8 mm (1.3 in)
1956	16.3 mm (0.6 in)
1957	32.8 mm (1.3 in)
1958	43.9 mm (1.7 in)
1959	45.6 mm (1.8 in)
1960	55.4 mm (2.2 in)
1961	98.8 mm (3.9 in)
1962	59.7 mm (2.4 in)
1963	47.0 mm (1.9 in)
1964	58.4 mm (2.3 in)
1965	65.3 mm (2.6 in)
1966	40.7 mm (1.6 in)
1967	71.7 mm (2.8 in)
1968	22.9 mm (0.9 in)
1969	37.8 mm (1.5 in)
1970	60.7 mm (2.4 in)
1971	31.8 mm (1.3 in)
1972	51.9 mm (2.0 in)
1973	18.9 mm (0.7 in)
1974	40.4 mm (1.6 in)
1975	34.0 mm (1.3 in)
1976	22.4 mm (0.9 in)
1977	35.8 mm (1.4 in)
1978	49.8 mm (2.0 in)
1979	71.6 mm (2.8 in)
1980	18.6 mm (0.7 in)
1981	36.4 mm (1.4 in)
1982	53.4 mm (2.1 in)
1983	88.0 mm (3.5 in)
1984	42.5 mm (1.7 in)
1985	26.7 mm (1.1 in)
1986	69.1 mm (2.7 in)
1987	53.4 mm (2.1 in)
1988	113.2 mm (4.5 in)
1989	34.3 mm (1.4 in)
1990	60.8 mm (2.4 in)
1991	31.5 mm (1.2 in)
1992	69.5 mm (2.7 in)
1993	54.4 mm (2.1 in)
1994	53.7 mm (2.1 in)
1995	29.2 mm (1.1 in)
1996	71.6 mm (2.8 in)
1997	70.1 mm (2.8 in)
1998	44.7 mm (1.8 in)
1999	20.1 mm (0.8 in)
2000	62.8 mm (2.5 in)
2001	37.6 mm (1.5 in)
2002	15.7 mm (0.6 in)
2003	64.2 mm (2.5 in)
2004	66.0 mm (2.6 in)
2005	57.6 mm (2.3 in)
2006	39.7 mm (1.6 in)
2007	38.6 mm (1.5 in)
2008	42.0 mm (1.7 in)
2009	11.7 mm (0.5 in)
2010	154.2 mm (6.1 in)
2011	41.9 mm (1.6 in)
2012	60.8 mm (2.4 in)
2013	92.0 mm (3.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Sonoita, 1948 to 2013. The record is 212 days in 2002, marked on the chart; the median year is 102 days.

Longest dry spell (CDD) at Sonoita by year
Year	Longest dry spell (CDD)
1948	39 days
1949	113 days
1950	53 days
1951	92 days
1952	83 days
1953	162 days
1954	90 days
1955	144 days
1956	132 days
1957	56 days
1958	112 days
1959	138 days
1960	158 days
1961	94 days
1962	105 days
1963	82 days
1964	194 days
1965	95 days
1966	128 days
1967	142 days
1968	163 days
1969	72 days
1970	75 days
1971	147 days
1972	158 days
1973	104 days
1974	119 days
1975	80 days
1976	49 days
1977	54 days
1978	76 days
1979	107 days
1980	119 days
1981	55 days
1982	109 days
1983	90 days
1984	91 days
1985	70 days
1986	107 days
1987	80 days
1988	79 days
1989	121 days
1990	96 days
1991	98 days
1992	101 days
1993	148 days
1994	96 days
1995	82 days
1996	133 days
1997	107 days
1998	106 days
1999	103 days
2000	112 days
2001	72 days
2002	212 days
2003	48 days
2004	110 days
2005	85 days
2006	116 days
2007	93 days
2008	96 days
2009	69 days
2010	126 days
2011	52 days
2012	107 days
2013	114 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

50 years with a frost

Across 50 years with a frost, the median last spring frost at Sonoita falls on 9 February and the median first autumn frost on 1 December, which leaves a median of 294 days between them.

Fitted over all years, the growing season changes by +0.4 days per decade at this station.

Frost dates and growing season at Sonoita
Measure	Median, all years	Earliest period	Recent period (1981 to 2012)	Recent against earliest	Fitted trend
Last spring frost	9 February	n/a	9 February	n/a	-0.3 days per decade
First autumn frost	1 December	n/a	30 November	n/a	0.0 days per decade
Growing days	294 days	n/a	291 days	n/a	+0.4 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

61 years, 1949 to 2012

A day with at least 32.3 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 103.6 mm (4.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Sonoita: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	32.3 mm (1.3 in)
5 years	48.2 mm (1.9 in)
10 years	59.9 mm (2.4 in)
25 years	76.2 mm (3.0 in)
50 years	89.4 mm (3.5 in)
100 years	103.6 mm (4.1 in)	Longer than the 61 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, 61 years of values from 1949 to 2012.

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: 130.3 mm (5.1 in) in 2010; 79.0 mm (3.1 in) in 1961; 71.6 mm (2.8 in) in 1996.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Sonoita, at 2001. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 2001 ran 0.5 C (0.9 F) lower than in the years before (likely change).

Suspected changes in the annual mean temperature at Sonoita, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
2001	-0.5	-0.9	likely	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Download the Data

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