Mexicali (Smn) Weather Records (MXN00002034)

Record envelope, standing records and threshold days for Mexicali (Smn) (MXN00002034), Mexico, with 59 years of record.

Key Facts for Mexicali (Smn)

Mexicali (Smn) (MXN00002034) is a weather station in Mexico at 32.55 latitude and -115.47 longitude, 3 m (9 ft) above sea level.
The station reports from 1930 to 1988, 59 years of record.
1,464 records set at Mexicali (Smn) still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Mexicali (Smn) set a daily record precipitation of 0.8 mm (0.03 in) on 15 April 1988.

About the Station

Location: Mexico, 32.55 latitude, -115.47 longitude.
Elevation: 3 m (9 ft).
Period of record: 1930 to 1988, 59 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 Mexicali (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 Mexicali (Smn), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	32.8 C (91.0 F)	-7.2 C (19.0 F)	n/a	n/a
Feb	35.0 C (95.0 F)	-4.4 C (24.1 F)	n/a	n/a
Mar	41.7 C (107.1 F)	-3.3 C (26.1 F)	n/a	n/a
Apr	51.7 C (125.1 F)	1.1 C (34.0 F)	n/a	n/a
May	55.6 C (132.1 F)	1.7 C (35.1 F)	n/a	n/a
Jun	55.6 C (132.1 F)	5.0 C (41.0 F)	n/a	n/a
Jul	56.7 C (134.1 F)	9.4 C (48.9 F)	n/a	n/a
Aug	56.7 C (134.1 F)	10.0 C (50.0 F)	n/a	n/a
Sep	56.7 C (134.1 F)	5.0 C (41.0 F)	n/a	n/a
Oct	51.7 C (125.1 F)	-2.8 C (27.0 F)	n/a	n/a
Nov	45.6 C (114.1 F)	-5.0 C (23.0 F)	n/a	n/a
Dec	35.0 C (95.0 F)	-5.0 C (23.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Mexicali (Smn) still stand. 1949 holds the most, with 163.

Standing records at Mexicali (Smn) by the year they were set
Year set	Standing records
1930	39
1931	46
1932	23
1933	41
1934	43
1935	18
1936	23
1937	29
1938	35
1939	5
1944	6
1945	11
1948	19
1949	163
1950	129
1951	89
1952	139
1953	14
1954	13
1955	15
1956	16
1957	29
1958	22
1959	12
1960	24
1961	5
1962	14
1963	22
1964	30
1965	18
1966	14
1967	17
1968	14
1969	24
1970	10
1971	35
1972	34
1973	8
1974	14
1975	19
1976	17
1977	8
1978	11
1979	7
1980	9
1981	16
1982	8
1983	24
1984	16
1985	32
1986	19
1987	14
1988	2

Wettest Day of Each Month

Jan: 88.9 mm (3.5 in)

The wettest day on record for each calendar month at Mexicali (Smn). The most was 88.9 mm (3.5 in) on 16 January 1933.

Record daily precipitation for each month at Mexicali (Smn)
Month	Record daily precipitation (mm)	Date
Jan	88.9 mm (3.5 in)	16 January 1933
Feb	64.8 mm (2.6 in)	20 February 1973
Mar	53.1 mm (2.1 in)	23 March 1934
Apr	30.0 mm (1.2 in)	12 April 1930
May	11.2 mm (0.4 in)	1 May 1930
Jun	43.2 mm (1.7 in)	3 June 1931
Jul	24.9 mm (1.0 in)	19 July 1979
Aug	57.9 mm (2.3 in)	11 August 1979
Sep	78.0 mm (3.1 in)	10 September 1959
Oct	61.0 mm (2.4 in)	10 October 1933
Nov	63.5 mm (2.5 in)	11 November 1931
Dec	73.7 mm (2.9 in)	12 December 1934

Period of Record Coverage

1930 to 1988

53 years of record at Mexicali (Smn), 1930 to 1988. 8 years have data for under 90 percent of days and are left out of rankings: 1939, 1944, 1945, 1948, 1949, 1952, 1980, 1988.

Days with data per year at Mexicali (Smn)
Year	Days with data	Share of year	Complete
1930	364	100%	Yes
1931	365	100%	Yes
1932	365	100%	Yes
1933	365	100%	Yes
1934	365	100%	Yes
1935	364	100%	Yes
1936	366	100%	Yes
1937	365	100%	Yes
1938	365	100%	Yes
1939	182	50%	No
1944	152	42%	No
1945	151	41%	No
1948	295	81%	No
1949	214	59%	No
1950	364	100%	Yes
1951	365	100%	Yes
1952	301	82%	No
1953	365	100%	Yes
1954	365	100%	Yes
1955	364	100%	Yes
1956	335	92%	Yes
1957	365	100%	Yes
1958	355	97%	Yes
1959	365	100%	Yes
1960	365	100%	Yes
1961	364	100%	Yes
1962	365	100%	Yes
1963	364	100%	Yes
1964	365	100%	Yes
1965	363	99%	Yes
1966	330	90%	Yes
1967	356	98%	Yes
1968	362	99%	Yes
1969	362	99%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	332	91%	Yes
1973	363	99%	Yes
1974	365	100%	Yes
1975	335	92%	Yes
1976	366	100%	Yes
1977	354	97%	Yes
1978	362	99%	Yes
1979	364	100%	Yes
1980	212	58%	No
1981	365	100%	Yes
1982	360	99%	Yes
1983	358	98%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	334	92%	Yes
1987	329	90%	Yes
1988	150	41%	No

Latest Records

Latest records at Mexicali (Smn)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 April 1988	Mexicali (Smn), MX	daily rain	0.8 mm (0.03 in)	0.8 mm (0.03 in)	58 years	20 of 100 (Routine)
14 April 1988	Mexicali (Smn), MX	daily rain	2.3 mm (0.09 in)	1.0 mm (0.04 in)	17 years	11 of 100 (Routine)
12 April 1988	Mexicali (Smn), MX	daily high min	18.9 C (66.0 F)	1.1 C (2.0 F)	57 years	24 of 100 (Routine)
11 April 1988	Mexicali (Smn), MX	daily high max (Tie)	37.8 C (100.0 F)	tie	36 years	3 of 100 (Routine)
10 April 1988	Mexicali (Smn), MX	daily high max (Tie)	37.2 C (99.0 F)	tie	36 years	3 of 100 (Routine)
26 March 1988	Mexicali (Smn), MX	daily high max (Tie)	40.0 C (104.0 F)	tie	36 years	3 of 100 (Routine)
20 March 1988	Mexicali (Smn), MX	daily high max	34.4 C (93.9 F)	1.1 C (2.0 F)	54 years	23 of 100 (Routine)
12 March 1988	Mexicali (Smn), MX	daily low min (Tie)	1.1 C (34.0 F)	tie	19 years	2 of 100 (Routine)
7 March 1988	Mexicali (Smn), MX	daily high min (Tie)	15.0 C (59.0 F)	tie	39 years	4 of 100 (Routine)
1 February 1988	Mexicali (Smn), MX	daily rain	3.3 mm (0.13 in)	2.3 mm (0.09 in)	49 years	20 of 100 (Routine)
28 December 1987	Mexicali (Smn), MX	daily low min	-3.3 C (26.1 F)	2.2 C (4.0 F)	37 years	22 of 100 (Routine)
24 December 1987	Mexicali (Smn), MX	daily low max (Tie)	10.0 C (50.0 F)	tie	21 years	2 of 100 (Routine)
18 December 1987	Mexicali (Smn), MX	daily low max	12.8 C (55.0 F)	2.2 C (4.0 F)	20 years	16 of 100 (Routine)
5 December 1987	Mexicali (Smn), MX	daily high min (Tie)	13.9 C (57.0 F)	tie	20 years	2 of 100 (Routine)
4 November 1987	Mexicali (Smn), MX	daily rain	0.8 mm (0.03 in)	0.8 mm (0.03 in)	56 years	20 of 100 (Routine)
2 November 1987	Mexicali (Smn), MX	daily rain	0.3 mm (0.01 in)	0.3 mm (0.01 in)	56 years	20 of 100 (Routine)
31 October 1987	Mexicali (Smn), MX	daily rain (Tie)	0.8 mm (0.03 in)	tie	29 years	3 of 100 (Routine)
28 October 1987	Mexicali (Smn), MX	daily high min	17.8 C (64.0 F)	1.1 C (2.0 F)	5 years	8 of 100 (Routine)
27 October 1987	Mexicali (Smn), MX	daily high min	20.6 C (69.1 F)	4.5 C (8.1 F)	29 years	24 of 100 (Routine)
24 October 1987	Mexicali (Smn), MX	daily high min	20.0 C (68.0 F)	2.8 C (5.0 F)	32 years	21 of 100 (Routine)

Climate Trend

39 complete years, 1930 to 1985

One stripe for each of 39 complete years at Mexicali (Smn), 1930 to 1985. Blue stripes are years cooler than the station's own mean of 21.8 C (71.2 F); red stripes are warmer. The coolest year was 1951, at 18.6 C (65.4 F), and the warmest was 1954, at 23.5 C (74.3 F). The strongest colour marks a difference of 3.3 C (5.9 F).

Annual mean temperature at Mexicali (Smn) as warming stripes, 1930 to 1985
Year	Annual mean temperature	Difference from the station mean
1930	22.4 C	+0.63 C
1931	22.4 C	+0.62 C
1932	21.6 C	-0.22 C
1933	21.5 C	-0.28 C
1934	23.0 C	+1.19 C
1935	21.7 C	-0.07 C
1936	22.5 C	+0.68 C
1937	22.1 C	+0.35 C
1938	21.6 C	-0.15 C
1950	19.3 C	-2.48 C
1951	18.6 C	-3.21 C
1953	22.7 C	+0.88 C
1954	23.5 C	+1.73 C
1955	22.4 C	+0.59 C
1957	22.4 C	+0.58 C
1958	22.3 C	+0.49 C
1959	21.5 C	-0.32 C
1960	22.0 C	+0.20 C
1961	21.1 C	-0.64 C
1962	21.8 C	+0.00 C
1963	21.6 C	-0.17 C
1964	20.9 C	-0.84 C
1965	21.3 C	-0.50 C
1967	21.6 C	-0.18 C
1968	21.4 C	-0.40 C
1969	21.8 C	-0.02 C
1970	21.4 C	-0.41 C
1971	20.8 C	-1.02 C
1973	21.2 C	-0.58 C
1974	22.0 C	+0.23 C
1976	21.3 C	-0.48 C
1977	22.2 C	+0.39 C
1978	22.0 C	+0.25 C
1979	21.9 C	+0.13 C
1981	23.4 C	+1.60 C
1982	21.2 C	-0.55 C
1983	22.0 C	+0.17 C
1984	22.4 C	+0.59 C
1985	22.9 C	+1.12 C

The fitted trend in annual mean temperature here over 1930 to 1985 is 0.00 C (-0.18 to 0.18) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.00 F (-0.32 to 0.32) per decade. The slope is a straight line fitted to 39 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Mexicali (Smn)
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.00 C (-0.18 to 0.18) per decade	0.00 F (-0.32 to 0.32) per decade	1930 to 1985	39	Not clearly different from zero
Mean daily maximum	0.20 C (0.04 to 0.36) per decade	0.4 F (0.1 to 0.6) per decade	1930 to 1985	39	Rise
Mean daily minimum	-0.2 C (-0.5 to 0.1) per decade	-0.4 F (-1.0 to 0.2) per decade	1930 to 1985	39	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

1930 to 1988

Yearly extremes at Mexicali (Smn): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	56.7 C (134.1 F)	1949	46.7 C (116.1 F)	53
Coldest night (TNn)	-7.2 C (19.0 F)	1937	-2.2 C (28.0 F)	53
Wettest day (Rx1day)	88.9 mm (3.5 in)	1933	26.1 mm (1.0 in)	54
Wettest five days (Rx5day)	177.6 mm (7.0 in)	1933	30.9 mm (1.2 in)	54
Longest dry spell (CDD)	305 days	1953	139 days	54

Hottest day (TXx)

The hottest day of the year at Mexicali (Smn), 1930 to 1988. The record is 56.7 C (134.1 F) in 1949, marked on the chart; the median year is 46.7 C (116.1 F).

Hottest day (TXx) at Mexicali (Smn) by year
Year	Hottest day (TXx)
1930	45.0 C (113.0 F)
1931	45.6 C (114.1 F)
1932	43.9 C (111.0 F)
1933	46.7 C (116.1 F)
1934	45.6 C (114.1 F)
1935	45.6 C (114.1 F)
1936	45.0 C (113.0 F)
1937	45.0 C (113.0 F)
1938	42.8 C (109.0 F)
1939	42.2 C (108.0 F)
1944	46.1 C (115.0 F)
1945	38.9 C (102.0 F)
1947	n/a
1948	44.4 C (111.9 F)
1949	56.7 C (134.1 F)
1950	48.9 C (120.0 F)
1951	46.1 C (115.0 F)
1952	56.7 C (134.1 F)
1953	47.8 C (118.0 F)
1954	48.3 C (118.9 F)
1955	46.7 C (116.1 F)
1956	46.7 C (116.1 F)
1957	48.9 C (120.0 F)
1958	47.8 C (118.0 F)
1959	48.3 C (118.9 F)
1960	47.8 C (118.0 F)
1961	46.7 C (116.1 F)
1962	46.1 C (115.0 F)
1963	45.6 C (114.1 F)
1964	46.7 C (116.1 F)
1965	46.7 C (116.1 F)
1966	45.6 C (114.1 F)
1967	45.6 C (114.1 F)
1968	46.7 C (116.1 F)
1969	50.6 C (123.1 F)
1970	47.8 C (118.0 F)
1971	46.1 C (115.0 F)
1972	47.2 C (117.0 F)
1973	46.7 C (116.1 F)
1974	46.7 C (116.1 F)
1975	45.6 C (114.1 F)
1976	46.1 C (115.0 F)
1977	45.6 C (114.1 F)
1978	46.7 C (116.1 F)
1979	46.7 C (116.1 F)
1980	45.6 C (114.1 F)
1981	46.7 C (116.1 F)
1982	45.6 C (114.1 F)
1983	45.6 C (114.1 F)
1984	47.8 C (118.0 F)
1985	49.4 C (120.9 F)
1986	47.8 C (118.0 F)
1987	47.8 C (118.0 F)
1988	42.2 C (108.0 F)

Coldest night (TNn)

The coldest night of the year at Mexicali (Smn), 1930 to 1988. The record is -7.2 C (19.0 F) in 1937, marked on the chart; the median year is -2.2 C (28.0 F).

Coldest night (TNn) at Mexicali (Smn) by year
Year	Coldest night (TNn)
1930	0.0 C (32.0 F)
1931	-1.1 C (30.0 F)
1932	-2.2 C (28.0 F)
1933	-2.2 C (28.0 F)
1934	-1.1 C (30.0 F)
1935	-0.6 C (30.9 F)
1936	0.6 C (33.1 F)
1937	-7.2 C (19.0 F)
1938	-5.0 C (23.0 F)
1939	0.0 C (32.0 F)
1944	-0.6 C (30.9 F)
1945	0.0 C (32.0 F)
1947	n/a
1948	-1.1 C (30.0 F)
1949	-2.2 C (28.0 F)
1950	-3.3 C (26.1 F)
1951	-1.7 C (28.9 F)
1952	-2.2 C (28.0 F)
1953	-2.2 C (28.0 F)
1954	-3.9 C (25.0 F)
1955	-0.6 C (30.9 F)
1956	-2.2 C (28.0 F)
1957	0.6 C (33.1 F)
1958	-5.0 C (23.0 F)
1959	-4.4 C (24.1 F)
1960	-5.0 C (23.0 F)
1961	-1.1 C (30.0 F)
1962	-5.0 C (23.0 F)
1963	-7.2 C (19.0 F)
1964	-3.9 C (25.0 F)
1965	-2.2 C (28.0 F)
1966	-3.3 C (26.1 F)
1967	-2.8 C (27.0 F)
1968	-5.0 C (23.0 F)
1969	-3.3 C (26.1 F)
1970	-5.0 C (23.0 F)
1971	-6.1 C (21.0 F)
1972	-6.1 C (21.0 F)
1973	-3.3 C (26.1 F)
1974	-3.3 C (26.1 F)
1975	-3.3 C (26.1 F)
1976	-5.0 C (23.0 F)
1977	-1.1 C (30.0 F)
1978	-5.0 C (23.0 F)
1979	-2.2 C (28.0 F)
1980	1.1 C (34.0 F)
1981	0.6 C (33.1 F)
1982	-1.1 C (30.0 F)
1983	0.0 C (32.0 F)
1984	0.0 C (32.0 F)
1985	-2.8 C (27.0 F)
1986	0.0 C (32.0 F)
1987	-3.3 C (26.1 F)
1988	0.0 C (32.0 F)

Wettest day (Rx1day)

The wettest day of the year at Mexicali (Smn), 1930 to 1988. The record is 88.9 mm (3.5 in) in 1933, marked on the chart; the median year is 26.1 mm (1.0 in).

Wettest day (Rx1day) at Mexicali (Smn) by year
Year	Wettest day (Rx1day)
1930	30.0 mm (1.2 in)
1931	63.5 mm (2.5 in)
1932	44.5 mm (1.8 in)
1933	88.9 mm (3.5 in)
1934	73.7 mm (2.9 in)
1935	22.9 mm (0.9 in)
1936	70.9 mm (2.8 in)
1937	38.4 mm (1.5 in)
1938	45.0 mm (1.8 in)
1939	51.8 mm (2.0 in)
1944	20.1 mm (0.8 in)
1945	16.8 mm (0.7 in)
1947	2.3 mm (0.09 in)
1948	28.4 mm (1.1 in)
1949	25.4 mm (1.0 in)
1950	5.3 mm (0.21 in)
1951	16.8 mm (0.7 in)
1952	11.4 mm (0.4 in)
1953	6.9 mm (0.27 in)
1954	7.9 mm (0.31 in)
1955	29.7 mm (1.2 in)
1956	3.6 mm (0.14 in)
1957	36.8 mm (1.4 in)
1958	21.8 mm (0.9 in)
1959	78.0 mm (3.1 in)
1960	9.9 mm (0.39 in)
1961	32.5 mm (1.3 in)
1962	31.8 mm (1.3 in)
1963	38.4 mm (1.5 in)
1964	7.4 mm (0.29 in)
1965	31.8 mm (1.3 in)
1966	16.8 mm (0.7 in)
1967	36.3 mm (1.4 in)
1968	6.1 mm (0.24 in)
1969	25.9 mm (1.0 in)
1970	19.3 mm (0.8 in)
1971	22.4 mm (0.9 in)
1972	41.9 mm (1.6 in)
1973	64.8 mm (2.6 in)
1974	25.9 mm (1.0 in)
1975	10.9 mm (0.4 in)
1976	51.8 mm (2.0 in)
1977	40.4 mm (1.6 in)
1978	13.5 mm (0.5 in)
1979	57.9 mm (2.3 in)
1980	14.5 mm (0.6 in)
1981	26.2 mm (1.0 in)
1982	61.0 mm (2.4 in)
1983	46.0 mm (1.8 in)
1984	12.4 mm (0.5 in)
1985	19.8 mm (0.8 in)
1986	27.4 mm (1.1 in)
1987	7.4 mm (0.29 in)
1988	3.3 mm (0.13 in)

Wettest five days (Rx5day)

The wettest five days of the year at Mexicali (Smn), 1930 to 1988. The record is 177.6 mm (7.0 in) in 1933, marked on the chart; the median year is 30.9 mm (1.2 in).

Wettest five days (Rx5day) at Mexicali (Smn) by year
Year	Wettest five days (Rx5day)
1930	30.8 mm (1.2 in)
1931	88.9 mm (3.5 in)
1932	95.6 mm (3.8 in)
1933	177.6 mm (7.0 in)
1934	82.6 mm (3.3 in)
1935	43.0 mm (1.7 in)
1936	78.8 mm (3.1 in)
1937	38.4 mm (1.5 in)
1938	106.8 mm (4.2 in)
1939	51.8 mm (2.0 in)
1944	25.7 mm (1.0 in)
1945	18.6 mm (0.7 in)
1947	3.1 mm (0.12 in)
1948	35.0 mm (1.4 in)
1949	35.8 mm (1.4 in)
1950	5.3 mm (0.21 in)
1951	19.9 mm (0.8 in)
1952	11.4 mm (0.4 in)
1953	6.9 mm (0.27 in)
1954	8.7 mm (0.34 in)
1955	35.6 mm (1.4 in)
1956	4.7 mm (0.19 in)
1957	42.0 mm (1.7 in)
1958	30.9 mm (1.2 in)
1959	78.0 mm (3.1 in)
1960	14.8 mm (0.6 in)
1961	17.0 mm (0.7 in)
1962	34.6 mm (1.4 in)
1963	38.4 mm (1.5 in)
1964	7.4 mm (0.29 in)
1965	44.0 mm (1.7 in)
1966	19.1 mm (0.8 in)
1967	37.1 mm (1.5 in)
1968	6.4 mm (0.25 in)
1969	42.7 mm (1.7 in)
1970	20.1 mm (0.8 in)
1971	22.4 mm (0.9 in)
1972	82.8 mm (3.3 in)
1973	65.6 mm (2.6 in)
1974	25.9 mm (1.0 in)
1975	14.2 mm (0.6 in)
1976	51.8 mm (2.0 in)
1977	71.6 mm (2.8 in)
1978	15.3 mm (0.6 in)
1979	62.2 mm (2.4 in)
1980	21.4 mm (0.8 in)
1981	26.2 mm (1.0 in)
1982	89.7 mm (3.5 in)
1983	61.3 mm (2.4 in)
1984	17.2 mm (0.7 in)
1985	20.6 mm (0.8 in)
1986	27.4 mm (1.1 in)
1987	10.5 mm (0.4 in)
1988	3.4 mm (0.13 in)

Longest dry spell (CDD)

The longest dry spell of the year at Mexicali (Smn), 1930 to 1988. The record is 305 days in 1953, marked on the chart; the median year is 139 days.

Longest dry spell (CDD) at Mexicali (Smn) by year
Year	Longest dry spell (CDD)
1930	197 days
1931	70 days
1932	231 days
1933	108 days
1934	263 days
1935	285 days
1936	173 days
1937	188 days
1938	148 days
1939	63 days
1944	62 days
1945	88 days
1947	27 days
1948	152 days
1949	218 days
1950	176 days
1951	92 days
1952	144 days
1953	305 days
1954	139 days
1955	199 days
1956	304 days
1957	151 days
1958	97 days
1959	101 days
1960	138 days
1961	125 days
1962	271 days
1963	136 days
1964	143 days
1965	135 days
1966	64 days
1967	117 days
1968	245 days
1969	178 days
1970	302 days
1971	116 days
1972	121 days
1973	143 days
1974	126 days
1975	106 days
1976	125 days
1977	225 days
1978	234 days
1979	138 days
1980	122 days
1981	107 days
1982	163 days
1983	129 days
1984	106 days
1985	259 days
1986	107 days
1987	207 days
1988	47 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

24 years with a frost

Across 24 years with a frost, the median last spring frost at Mexicali (Smn) falls on 5 February and the median first autumn frost on 7 December, which leaves a median of 309 days between them.

Frost dates and growing season at Mexicali (Smn)
Measure	Median, all years	Earliest period	Recent period (1932 to 1985)	Recent against earliest	Fitted trend
Last spring frost	5 February	n/a	5 February	n/a	n/a
First autumn frost	7 December	n/a	7 December	n/a	n/a
Growing days	309 days	n/a	309 days	n/a	n/a

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, 1930 to 1987

A day with at least 28.0 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 104.5 mm (4.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Mexicali (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	28.0 mm (1.1 in)
5 years	47.4 mm (1.9 in)
10 years	60.7 mm (2.4 in)
25 years	78.0 mm (3.1 in)
50 years	91.2 mm (3.6 in)	Longer than the 48 years of record
100 years	104.5 mm (4.1 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 1930 to 1987.

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: 88.9 mm (3.5 in) in 1933; 78.0 mm (3.1 in) in 1959; 73.7 mm (2.9 in) in 1934.

Download the Data

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