Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Arroyo Seco. 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 Arroyo Seco, 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)
-2.2 C (28.0 F)
n/a
n/a
Feb
40.0 C (104.0 F)
-2.2 C (28.0 F)
n/a
n/a
Mar
42.8 C (109.0 F)
0.0 C (32.0 F)
n/a
n/a
Apr
43.9 C (111.0 F)
2.8 C (37.0 F)
n/a
n/a
May
46.7 C (116.1 F)
7.8 C (46.0 F)
n/a
n/a
Jun
45.0 C (113.0 F)
8.9 C (48.0 F)
n/a
n/a
Jul
41.7 C (107.1 F)
10.0 C (50.0 F)
n/a
n/a
Aug
40.6 C (105.1 F)
7.8 C (46.0 F)
n/a
n/a
Sep
38.9 C (102.0 F)
8.9 C (48.0 F)
n/a
n/a
Oct
38.9 C (102.0 F)
5.0 C (41.0 F)
n/a
n/a
Nov
35.6 C (96.1 F)
1.7 C (35.1 F)
n/a
n/a
Dec
36.7 C (98.1 F)
-5.0 C (23.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Arroyo Seco still stand. 1995 holds the most, with 105.
Standing records at Arroyo Seco by the year they were set
Year set
Standing records
1974
3
1975
72
1976
73
1977
89
1978
65
1979
80
1980
66
1981
53
1982
56
1983
48
1984
51
1985
33
1986
38
1987
66
1988
49
1989
56
1990
46
1991
40
1992
32
1993
67
1994
36
1995
105
1996
13
1997
41
1998
30
1999
17
2000
21
2001
12
2002
19
2003
21
2004
12
2005
39
2006
15
All-Time Record Progression
1 new records
1 all-time records were set at Arroyo Seco between 22 June 2006 and 22 June 2006. Each dot is a new record.
When Arroyo Seco set new all-time records
Date
Kind
Detail
2006-06-22
Record high minimum temperature
Record high minimum temperature 25.6 C (78.1 F)
Wettest Day of Each Month
Sep: 105.9 mm (4.2 in)
The wettest day on record for each calendar month at Arroyo Seco. The most was 105.9 mm (4.2 in) on 3 September 1996.
Record daily precipitation for each month at Arroyo Seco
Month
Record daily precipitation (mm)
Date
Jan
36.8 mm (1.4 in)
18 January 1975
Feb
19.8 mm (0.8 in)
5 February 1984
Mar
39.9 mm (1.6 in)
23 March 2006
Apr
51.8 mm (2.0 in)
29 April 1981
May
49.8 mm (2.0 in)
23 May 1981
Jun
59.9 mm (2.4 in)
4 June 1985
Jul
73.9 mm (2.9 in)
2 July 1983
Aug
59.9 mm (2.4 in)
21 August 2005
Sep
105.9 mm (4.2 in)
3 September 1996
Oct
71.9 mm (2.8 in)
9 October 1982
Nov
19.8 mm (0.8 in)
27 November 1985
Dec
23.9 mm (0.9 in)
16 December 2004
Period of Record Coverage
1974 to 2006
Complete yearUnder 90 percent of days
33 years of record at Arroyo Seco, 1974 to 2006. 13 years have data for under 90 percent of days and are left out of rankings: 1974, 1990, 1992, 1996, 1997, 1998, 1999, 2000 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 17 complete years at Arroyo Seco, 1975 to 2006. Blue stripes are years cooler than the station's own mean of 21.5 C (70.8 F); red stripes are warmer. The coolest year was 1995, at 19.8 C (67.7 F), and the warmest was 2006, at 23.1 C (73.5 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Arroyo Seco as warming stripes, 1975 to 2006
Year
Annual mean temperature
Difference from the station mean
1975
22.3 C
+0.72 C
1976
21.2 C
-0.37 C
1977
22.5 C
+0.91 C
1978
22.4 C
+0.88 C
1979
21.9 C
+0.32 C
1980
22.3 C
+0.74 C
1981
21.5 C
-0.01 C
1982
22.1 C
+0.60 C
1984
20.9 C
-0.67 C
1985
21.3 C
-0.27 C
1986
21.6 C
+0.10 C
1987
20.7 C
-0.87 C
1988
20.9 C
-0.67 C
1993
20.1 C
-1.47 C
1994
21.7 C
+0.16 C
1995
19.8 C
-1.71 C
2006
23.1 C
+1.54 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
1974 to 2006
Yearly extremes at Arroyo Seco: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
46.7 C (116.1 F)
1978
41.7 C (107.1 F)
33
Coldest night (TNn)
-5.0 C (23.0 F)
1997
0.6 C (33.1 F)
33
Wettest day (Rx1day)
105.9 mm (4.2 in)
1996
53.3 mm (2.1 in)
33
Wettest five days (Rx5day)
237.3 mm (9.3 in)
1978
112.1 mm (4.4 in)
33
Longest dry spell (CDD)
124 days
1991
61 days
33
Hottest day (TXx)
The hottest day of the year at Arroyo Seco, 1974 to 2006. The record is 46.7 C (116.1 F) in 1978, marked on the chart; the median year is 41.7 C (107.1 F).
Hottest day (TXx) at Arroyo Seco by year
Year
Hottest day (TXx)
1974
30.0 C (86.0 F)
1975
43.9 C (111.0 F)
1976
42.8 C (109.0 F)
1977
42.8 C (109.0 F)
1978
46.7 C (116.1 F)
1979
42.8 C (109.0 F)
1980
43.9 C (111.0 F)
1981
42.8 C (109.0 F)
1982
43.9 C (111.0 F)
1983
45.0 C (113.0 F)
1984
42.8 C (109.0 F)
1985
42.8 C (109.0 F)
1986
40.6 C (105.1 F)
1987
40.0 C (104.0 F)
1988
40.6 C (105.1 F)
1989
42.8 C (109.0 F)
1990
41.7 C (107.1 F)
1991
41.7 C (107.1 F)
1992
37.8 C (100.0 F)
1993
37.8 C (100.0 F)
1994
41.7 C (107.1 F)
1995
45.6 C (114.1 F)
1996
35.6 C (96.1 F)
1997
41.7 C (107.1 F)
1998
45.6 C (114.1 F)
1999
41.7 C (107.1 F)
2000
41.7 C (107.1 F)
2001
40.6 C (105.1 F)
2002
40.0 C (104.0 F)
2003
42.8 C (109.0 F)
2004
40.0 C (104.0 F)
2005
35.0 C (95.0 F)
2006
40.6 C (105.1 F)
Coldest night (TNn)
The coldest night of the year at Arroyo Seco, 1974 to 2006. The record is -5.0 C (23.0 F) in 1997, marked on the chart; the median year is 0.6 C (33.1 F).
Coldest night (TNn) at Arroyo Seco by year
Year
Coldest night (TNn)
1974
5.6 C (42.1 F)
1975
-2.2 C (28.0 F)
1976
-2.2 C (28.0 F)
1977
-1.1 C (30.0 F)
1978
-1.1 C (30.0 F)
1979
0.0 C (32.0 F)
1980
0.0 C (32.0 F)
1981
2.8 C (37.0 F)
1982
0.0 C (32.0 F)
1983
3.9 C (39.0 F)
1984
0.6 C (33.1 F)
1985
-2.2 C (28.0 F)
1986
0.0 C (32.0 F)
1987
0.6 C (33.1 F)
1988
0.0 C (32.0 F)
1989
-3.3 C (26.1 F)
1990
0.0 C (32.0 F)
1991
5.0 C (41.0 F)
1992
3.9 C (39.0 F)
1993
0.6 C (33.1 F)
1994
1.7 C (35.1 F)
1995
1.7 C (35.1 F)
1996
5.0 C (41.0 F)
1997
-5.0 C (23.0 F)
1998
6.7 C (44.1 F)
1999
3.9 C (39.0 F)
2000
0.0 C (32.0 F)
2001
0.6 C (33.1 F)
2002
2.8 C (37.0 F)
2003
1.7 C (35.1 F)
2004
1.7 C (35.1 F)
2005
5.6 C (42.1 F)
2006
3.9 C (39.0 F)
Wettest day (Rx1day)
The wettest day of the year at Arroyo Seco, 1974 to 2006. The record is 105.9 mm (4.2 in) in 1996, marked on the chart; the median year is 53.3 mm (2.1 in).
Wettest day (Rx1day) at Arroyo Seco by year
Year
Wettest day (Rx1day)
1974
14.0 mm (0.6 in)
1975
47.0 mm (1.9 in)
1976
58.9 mm (2.3 in)
1977
47.0 mm (1.9 in)
1978
82.8 mm (3.3 in)
1979
78.0 mm (3.1 in)
1980
62.0 mm (2.4 in)
1981
63.0 mm (2.5 in)
1982
71.9 mm (2.8 in)
1983
73.9 mm (2.9 in)
1984
42.9 mm (1.7 in)
1985
59.9 mm (2.4 in)
1986
49.8 mm (2.0 in)
1987
31.0 mm (1.2 in)
1988
90.9 mm (3.6 in)
1989
22.9 mm (0.9 in)
1990
30.0 mm (1.2 in)
1991
46.0 mm (1.8 in)
1992
30.0 mm (1.2 in)
1993
15.0 mm (0.6 in)
1994
30.0 mm (1.2 in)
1995
21.8 mm (0.9 in)
1996
105.9 mm (4.2 in)
1997
42.9 mm (1.7 in)
1998
82.8 mm (3.3 in)
1999
80.8 mm (3.2 in)
2000
51.8 mm (2.0 in)
2001
96.8 mm (3.8 in)
2002
69.9 mm (2.8 in)
2003
71.9 mm (2.8 in)
2004
34.8 mm (1.4 in)
2005
64.8 mm (2.6 in)
2006
53.3 mm (2.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Arroyo Seco, 1974 to 2006. The record is 237.3 mm (9.3 in) in 1978, marked on the chart; the median year is 112.1 mm (4.4 in).
Wettest five days (Rx5day) at Arroyo Seco by year
Year
Wettest five days (Rx5day)
1974
18.6 mm (0.7 in)
1975
180.6 mm (7.1 in)
1976
109.6 mm (4.3 in)
1977
65.8 mm (2.6 in)
1978
237.3 mm (9.3 in)
1979
170.4 mm (6.7 in)
1980
142.6 mm (5.6 in)
1981
146.4 mm (5.8 in)
1982
99.6 mm (3.9 in)
1983
115.5 mm (4.5 in)
1984
143.3 mm (5.6 in)
1985
119.6 mm (4.7 in)
1986
65.2 mm (2.6 in)
1987
48.3 mm (1.9 in)
1988
167.6 mm (6.6 in)
1989
23.7 mm (0.9 in)
1990
61.6 mm (2.4 in)
1991
157.2 mm (6.2 in)
1992
33.8 mm (1.3 in)
1993
19.8 mm (0.8 in)
1994
49.8 mm (2.0 in)
1995
57.4 mm (2.3 in)
1996
174.6 mm (6.9 in)
1997
99.4 mm (3.9 in)
1998
191.1 mm (7.5 in)
1999
185.5 mm (7.3 in)
2000
103.9 mm (4.1 in)
2001
192.6 mm (7.6 in)
2002
122.4 mm (4.8 in)
2003
112.1 mm (4.4 in)
2004
104.4 mm (4.1 in)
2005
174.0 mm (6.9 in)
2006
100.5 mm (4.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Arroyo Seco, 1974 to 2006. The record is 124 days in 1991, marked on the chart; the median year is 61 days.
Longest dry spell (CDD) at Arroyo Seco by year
Year
Longest dry spell (CDD)
1974
20 days
1975
68 days
1976
66 days
1977
62 days
1978
34 days
1979
58 days
1980
56 days
1981
33 days
1982
51 days
1983
73 days
1984
82 days
1985
43 days
1986
103 days
1987
61 days
1988
87 days
1989
90 days
1990
71 days
1991
124 days
1992
38 days
1993
84 days
1994
67 days
1995
87 days
1996
29 days
1997
31 days
1998
12 days
1999
22 days
2000
51 days
2001
47 days
2002
53 days
2003
83 days
2004
63 days
2005
55 days
2006
66 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.
Download the Data
Data for Arroyo Seco standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Arroyo Seco 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.