Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Las Hormigas. 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 Las Hormigas, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
35.0 C (95.0 F)
-9.4 C (15.1 F)
n/a
n/a
Feb
35.0 C (95.0 F)
-6.1 C (21.0 F)
n/a
n/a
Mar
35.0 C (95.0 F)
-5.0 C (23.0 F)
n/a
n/a
Apr
41.7 C (107.1 F)
-8.3 C (17.1 F)
n/a
n/a
May
42.8 C (109.0 F)
0.0 C (32.0 F)
n/a
n/a
Jun
41.7 C (107.1 F)
3.9 C (39.0 F)
n/a
n/a
Jul
40.0 C (104.0 F)
5.0 C (41.0 F)
n/a
n/a
Aug
38.9 C (102.0 F)
0.0 C (32.0 F)
n/a
n/a
Sep
37.8 C (100.0 F)
0.6 C (33.1 F)
n/a
n/a
Oct
35.0 C (95.0 F)
-2.2 C (28.0 F)
n/a
n/a
Nov
35.0 C (95.0 F)
-10.0 C (14.0 F)
n/a
n/a
Dec
30.0 C (86.0 F)
-11.1 C (12.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Las Hormigas still stand. 1981 holds the most, with 90.
Standing records at Las Hormigas by the year they were set
Year set
Standing records
1979
1
1980
8
1981
90
1982
37
1983
39
1984
48
1985
42
1986
38
1987
61
1988
56
1989
73
1990
63
1991
62
1992
73
1993
78
1994
44
1995
39
1996
36
1997
61
1998
36
1999
32
2000
24
2001
23
2002
83
2003
35
2004
36
2005
35
2006
46
2007
29
2008
34
2009
33
2010
31
2011
25
2012
13
Wettest Day of Each Month
May: 96.5 mm (3.8 in)
The wettest day on record for each calendar month at Las Hormigas. The most was 96.5 mm (3.8 in) on 20 May 1981.
Record daily precipitation for each month at Las Hormigas
Month
Record daily precipitation (mm)
Date
Jan
48.8 mm (1.9 in)
9 January 1992
Feb
27.9 mm (1.1 in)
25 February 1987
Mar
27.9 mm (1.1 in)
2 March 2001
Apr
45.0 mm (1.8 in)
15 April 1989
May
96.5 mm (3.8 in)
20 May 1981
Jun
45.0 mm (1.8 in)
6 June 2004
Jul
79.8 mm (3.1 in)
18 July 1984
Aug
50.8 mm (2.0 in)
17 August 1998
Sep
49.8 mm (2.0 in)
27 September 2004
Oct
43.9 mm (1.7 in)
3 October 1998
Nov
31.8 mm (1.3 in)
29 November 1992
Dec
33.8 mm (1.3 in)
2 December 1989
Period of Record Coverage
1979 to 2012
Complete yearUnder 90 percent of days
34 years of record at Las Hormigas, 1979 to 2012. 9 years have data for under 90 percent of days and are left out of rankings: 1979, 1980, 1981, 1982, 1985, 1986, 1989, 2002 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 23 complete years at Las Hormigas, 1983 to 2012. Blue stripes are years cooler than the station's own mean of 15.7 C (60.3 F); red stripes are warmer. The coolest year was 1987, at 14.7 C (58.5 F), and the warmest was 2011, at 16.4 C (61.5 F). The strongest colour marks a difference of 1.1 C (2.0 F).
Annual mean temperature at Las Hormigas as warming stripes, 1983 to 2012
Year
Annual mean temperature
Difference from the station mean
1983
15.1 C
-0.64 C
1987
14.7 C
-1.02 C
1988
15.0 C
-0.69 C
1990
15.5 C
-0.21 C
1991
15.6 C
-0.09 C
1992
15.3 C
-0.39 C
1993
16.0 C
+0.25 C
1994
16.2 C
+0.44 C
1995
16.0 C
+0.30 C
1996
15.8 C
+0.09 C
1997
15.9 C
+0.21 C
1999
16.0 C
+0.23 C
2000
16.1 C
+0.37 C
2001
15.9 C
+0.20 C
2004
15.6 C
-0.12 C
2005
16.1 C
+0.37 C
2006
16.2 C
+0.49 C
2007
16.0 C
+0.24 C
2008
15.7 C
0.00 C
2009
15.6 C
-0.11 C
2010
15.3 C
-0.48 C
2011
16.4 C
+0.65 C
2012
15.7 C
-0.06 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1979 to 2012
Yearly extremes at Las Hormigas: 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)
2002
35.6 C (96.1 F)
34
Coldest night (TNn)
-11.1 C (12.0 F)
1990
-4.4 C (24.1 F)
34
Wettest day (Rx1day)
96.5 mm (3.8 in)
1981
34.8 mm (1.4 in)
29
Wettest five days (Rx5day)
179.1 mm (7.1 in)
1981
62.3 mm (2.5 in)
29
Longest dry spell (CDD)
224 days
2003
62 days
29
Hottest day (TXx)
The hottest day of the year at Las Hormigas, 1979 to 2012. The record is 42.8 C (109.0 F) in 2002, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Las Hormigas by year
Year
Hottest day (TXx)
1979
21.7 C (71.1 F)
1980
25.6 C (78.1 F)
1981
38.9 C (102.0 F)
1982
36.1 C (97.0 F)
1983
35.0 C (95.0 F)
1984
35.6 C (96.1 F)
1985
30.6 C (87.1 F)
1986
35.6 C (96.1 F)
1987
32.8 C (91.0 F)
1988
30.6 C (87.1 F)
1989
35.6 C (96.1 F)
1990
36.7 C (98.1 F)
1991
32.8 C (91.0 F)
1992
40.0 C (104.0 F)
1993
41.7 C (107.1 F)
1994
35.0 C (95.0 F)
1995
33.9 C (93.0 F)
1996
37.8 C (100.0 F)
1997
35.0 C (95.0 F)
1998
35.0 C (95.0 F)
1999
37.8 C (100.0 F)
2000
33.9 C (93.0 F)
2001
38.9 C (102.0 F)
2002
42.8 C (109.0 F)
2003
38.9 C (102.0 F)
2004
35.6 C (96.1 F)
2005
38.9 C (102.0 F)
2006
38.9 C (102.0 F)
2007
35.0 C (95.0 F)
2008
40.0 C (104.0 F)
2009
33.9 C (93.0 F)
2010
31.7 C (89.1 F)
2011
35.6 C (96.1 F)
2012
31.7 C (89.1 F)
Coldest night (TNn)
The coldest night of the year at Las Hormigas, 1979 to 2012. The record is -11.1 C (12.0 F) in 1990, marked on the chart; the median year is -4.4 C (24.1 F).
Coldest night (TNn) at Las Hormigas by year
Year
Coldest night (TNn)
1979
-3.3 C (26.1 F)
1980
0.6 C (33.1 F)
1981
-3.3 C (26.1 F)
1982
-6.1 C (21.0 F)
1983
-3.3 C (26.1 F)
1984
-4.4 C (24.1 F)
1985
-6.1 C (21.0 F)
1986
-2.2 C (28.0 F)
1987
-8.3 C (17.1 F)
1988
-7.2 C (19.0 F)
1989
-5.0 C (23.0 F)
1990
-11.1 C (12.0 F)
1991
-10.0 C (14.0 F)
1992
-3.3 C (26.1 F)
1993
-5.0 C (23.0 F)
1994
-4.4 C (24.1 F)
1995
-4.4 C (24.1 F)
1996
-6.1 C (21.0 F)
1997
-8.3 C (17.1 F)
1998
-3.3 C (26.1 F)
1999
0.0 C (32.0 F)
2000
-4.4 C (24.1 F)
2001
-6.1 C (21.0 F)
2002
-4.4 C (24.1 F)
2003
-7.2 C (19.0 F)
2004
-4.4 C (24.1 F)
2005
-4.4 C (24.1 F)
2006
-9.4 C (15.1 F)
2007
-5.0 C (23.0 F)
2008
0.0 C (32.0 F)
2009
0.0 C (32.0 F)
2010
-5.0 C (23.0 F)
2011
-3.3 C (26.1 F)
2012
-3.9 C (25.0 F)
Wettest day (Rx1day)
The wettest day of the year at Las Hormigas, 1979 to 2012. The record is 96.5 mm (3.8 in) in 1981, marked on the chart; the median year is 34.8 mm (1.4 in).
Wettest day (Rx1day) at Las Hormigas by year
Year
Wettest day (Rx1day)
1979
0.0 mm (0.00 in)
1980
34.8 mm (1.4 in)
1981
96.5 mm (3.8 in)
1982
37.8 mm (1.5 in)
1983
37.8 mm (1.5 in)
1984
79.8 mm (3.1 in)
1985
31.8 mm (1.3 in)
1986
27.9 mm (1.1 in)
1987
39.9 mm (1.6 in)
1988
38.9 mm (1.5 in)
1989
45.0 mm (1.8 in)
1990
38.9 mm (1.5 in)
1991
26.9 mm (1.1 in)
1992
55.9 mm (2.2 in)
1993
33.8 mm (1.3 in)
1994
29.0 mm (1.1 in)
1995
27.9 mm (1.1 in)
1996
48.8 mm (1.9 in)
1997
31.8 mm (1.3 in)
1998
50.8 mm (2.0 in)
1999
47.0 mm (1.9 in)
2000
27.9 mm (1.1 in)
2001
39.9 mm (1.6 in)
2002
33.8 mm (1.3 in)
2003
19.8 mm (0.8 in)
2004
49.8 mm (2.0 in)
2005
29.0 mm (1.1 in)
2006
27.9 mm (1.1 in)
2007
23.9 mm (0.9 in)
2008
n/a
2009
n/a
2010
n/a
2011
n/a
2012
n/a
Wettest five days (Rx5day)
The wettest five days of the year at Las Hormigas, 1979 to 2012. The record is 179.1 mm (7.1 in) in 1981, marked on the chart; the median year is 62.3 mm (2.5 in).
Wettest five days (Rx5day) at Las Hormigas by year
Year
Wettest five days (Rx5day)
1979
0.0 mm (0.00 in)
1980
35.6 mm (1.4 in)
1981
179.1 mm (7.1 in)
1982
46.5 mm (1.8 in)
1983
96.9 mm (3.8 in)
1984
88.7 mm (3.5 in)
1985
48.5 mm (1.9 in)
1986
61.9 mm (2.4 in)
1987
69.9 mm (2.8 in)
1988
80.3 mm (3.2 in)
1989
99.9 mm (3.9 in)
1990
86.4 mm (3.4 in)
1991
89.4 mm (3.5 in)
1992
104.7 mm (4.1 in)
1993
67.4 mm (2.7 in)
1994
58.7 mm (2.3 in)
1995
51.8 mm (2.0 in)
1996
62.3 mm (2.5 in)
1997
74.2 mm (2.9 in)
1998
81.3 mm (3.2 in)
1999
47.0 mm (1.9 in)
2000
56.2 mm (2.2 in)
2001
48.8 mm (1.9 in)
2002
99.3 mm (3.9 in)
2003
31.4 mm (1.2 in)
2004
75.5 mm (3.0 in)
2005
56.4 mm (2.2 in)
2006
38.5 mm (1.5 in)
2007
44.7 mm (1.8 in)
2008
n/a
2009
n/a
2010
n/a
2011
n/a
2012
n/a
Longest dry spell (CDD)
The longest dry spell of the year at Las Hormigas, 1979 to 2012. The record is 224 days in 2003, marked on the chart; the median year is 62 days.
Longest dry spell (CDD) at Las Hormigas by year
Year
Longest dry spell (CDD)
1979
7 days
1980
20 days
1981
43 days
1982
109 days
1983
75 days
1984
62 days
1985
41 days
1986
98 days
1987
46 days
1988
44 days
1989
39 days
1990
39 days
1991
97 days
1992
30 days
1993
104 days
1994
75 days
1995
118 days
1996
170 days
1997
37 days
1998
112 days
1999
84 days
2000
91 days
2001
48 days
2002
41 days
2003
224 days
2004
61 days
2005
145 days
2006
62 days
2007
62 days
2008
n/a
2009
n/a
2010
n/a
2011
n/a
2012
n/a
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
23 years with a frost
Across 23 years with a frost, the median last spring frost at Las Hormigas falls on 30 March and the median first autumn frost on 12 November, which leaves a median of 233 days between them.
Frost dates and growing season at Las Hormigas
Measure
Median, all years
Earliest period
Recent period (1983 to 2012)
Recent against earliest
Fitted trend
Last spring frost
30 March
n/a
30 March
n/a
n/a
First autumn frost
12 November
n/a
12 November
n/a
n/a
Growing days
233 days
n/a
233 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.
Download the Data
Data for Las Hormigas standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Las Hormigas 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.