Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Santa Rosa Aero. 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 Santa Rosa Aero, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
45.7 C (114.3 F)
0.9 C (33.6 F)
n/a
n/a
Feb
42.5 C (108.5 F)
2.3 C (36.1 F)
n/a
n/a
Mar
40.7 C (105.3 F)
-3.7 C (25.3 F)
n/a
n/a
Apr
36.5 C (97.7 F)
-7.0 C (19.4 F)
n/a
n/a
May
31.8 C (89.2 F)
-8.6 C (16.5 F)
n/a
n/a
Jun
27.1 C (80.8 F)
-12.7 C (9.1 F)
n/a
n/a
Jul
27.8 C (82.0 F)
-12.3 C (9.9 F)
n/a
n/a
Aug
32.9 C (91.2 F)
-9.2 C (15.4 F)
n/a
n/a
Sep
35.2 C (95.4 F)
-8.8 C (16.2 F)
n/a
n/a
Oct
38.4 C (101.1 F)
-4.3 C (24.3 F)
n/a
n/a
Nov
39.9 C (103.8 F)
-1.2 C (29.8 F)
n/a
n/a
Dec
42.8 C (109.0 F)
2.0 C (35.6 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Santa Rosa Aero still stand. 1965 holds the most, with 40.
Standing records at Santa Rosa Aero by the year they were set
Year set
Standing records
1951
23
1952
11
1953
29
1954
34
1955
32
1956
22
1957
23
1958
29
1959
27
1960
16
1961
12
1962
23
1963
17
1964
27
1965
40
1966
28
1967
31
1968
31
1969
25
1970
30
1971
34
1972
31
1973
22
1974
13
1975
27
1976
23
1977
25
1978
14
1979
15
1980
31
1981
13
1982
14
1983
11
1984
23
1985
17
1986
17
1987
22
1988
10
1989
21
1990
26
1991
20
1992
20
1993
26
1994
22
1995
19
1996
25
1997
16
1998
13
1999
17
2000
17
2001
25
2002
17
2003
16
2004
13
2005
10
2006
18
2007
18
2008
19
2009
20
2010
14
2011
8
2012
15
2013
17
2014
15
2015
13
2016
5
2017
7
2018
11
2019
21
2020
6
2021
7
2022
20
2023
13
2024
17
2025
5
Wettest Day of Each Month
Feb: 329.9 mm (13.0 in)
The wettest day on record for each calendar month at Santa Rosa Aero. The most was 329.9 mm (13.0 in) on 20 February 1980.
Record daily precipitation for each month at Santa Rosa Aero
Month
Record daily precipitation (mm)
Date
Jan
135.9 mm (5.4 in)
17 January 2015
Feb
329.9 mm (13.0 in)
20 February 1980
Mar
192.0 mm (7.6 in)
9 March 2010
Apr
110.0 mm (4.3 in)
14 April 2001
May
145.0 mm (5.7 in)
15 May 2000
Jun
72.9 mm (2.9 in)
13 June 1997
Jul
50.0 mm (2.0 in)
1 July 1980
Aug
101.1 mm (4.0 in)
14 August 1990
Sep
70.1 mm (2.8 in)
24 September 1988
Oct
190.0 mm (7.5 in)
19 October 1995
Nov
150.1 mm (5.9 in)
15 November 1976
Dec
99.1 mm (3.9 in)
8 December 1989
Period of Record Coverage
1951 to 2025
Complete yearUnder 90 percent of days
74 years of record at Santa Rosa Aero, 1951 to 2025. 29 years have data for under 90 percent of days and are left out of rankings: 1951, 1952, 1953, 1959, 1961, 1967, 1971, 2004 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 44 complete years at Santa Rosa Aero, 1954 to 2003. 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 1955, at 14.7 C (58.4 F), and the warmest was 2003, at 16.7 C (62.1 F). The strongest colour marks a difference of 1.1 C (2.0 F).
Annual mean temperature at Santa Rosa Aero as warming stripes, 1954 to 2003
Year
Annual mean temperature
Difference from the station mean
1954
15.5 C
-0.23 C
1955
14.7 C
-1.06 C
1956
14.7 C
-1.03 C
1957
15.1 C
-0.61 C
1958
15.8 C
+0.02 C
1962
16.0 C
+0.21 C
1964
15.0 C
-0.71 C
1965
15.9 C
+0.17 C
1966
15.5 C
-0.22 C
1968
15.9 C
+0.14 C
1969
15.9 C
+0.12 C
1970
16.0 C
+0.21 C
1972
15.7 C
-0.09 C
1973
15.2 C
-0.60 C
1974
15.3 C
-0.41 C
1975
15.9 C
+0.12 C
1976
14.9 C
-0.87 C
1977
16.2 C
+0.44 C
1978
15.9 C
+0.13 C
1979
15.8 C
+0.04 C
1980
16.6 C
+0.80 C
1981
16.2 C
+0.44 C
1982
16.2 C
+0.49 C
1983
15.7 C
-0.09 C
1984
14.8 C
-0.91 C
1985
15.7 C
-0.02 C
1986
15.5 C
-0.21 C
1987
15.8 C
+0.00 C
1988
15.6 C
-0.11 C
1989
16.5 C
+0.74 C
1990
16.3 C
+0.52 C
1991
15.8 C
+0.07 C
1992
15.5 C
-0.24 C
1993
15.7 C
-0.07 C
1994
16.5 C
+0.76 C
1995
16.4 C
+0.62 C
1996
16.2 C
+0.44 C
1997
16.3 C
+0.59 C
1998
16.0 C
+0.20 C
1999
15.5 C
-0.24 C
2000
15.2 C
-0.53 C
2001
15.9 C
+0.15 C
2002
15.6 C
-0.18 C
2003
16.7 C
+0.96 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1954 to 2003. In Fahrenheit: 0.3 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 44 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Santa Rosa Aero
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.2) per decade
0.3 F (0.1 to 0.4) per decade
1954 to 2003
44
Rise
Mean daily maximum
-0.1 C (-0.2 to 0.1) per decade
-0.2 F (-0.4 to 0.1) per decade
1954 to 2003
44
Not clearly different from zero
Mean daily minimum
0.4 C (0.3 to 0.5) per decade
0.7 F (0.5 to 0.9) per decade
1954 to 2003
44
Rise
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
1951 to 2025
Yearly extremes at Santa Rosa Aero: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
45.7 C (114.3 F)
1955
39.6 C (103.3 F)
74
Coldest night (TNn)
-12.7 C (9.1 F)
1967
-7.0 C (19.4 F)
75
Wettest day (Rx1day)
329.9 mm (13.0 in)
1980
63.5 mm (2.5 in)
56
Wettest five days (Rx5day)
353.9 mm (13.9 in)
2017
82.8 mm (3.3 in)
54
Longest dry spell (CDD)
24 days
1979
6 days
56
Hottest day (TXx)
The hottest day of the year at Santa Rosa Aero, 1951 to 2025. The record is 45.7 C (114.3 F) in 1955, marked on the chart; the median year is 39.6 C (103.3 F).
Hottest day (TXx) at Santa Rosa Aero by year
Year
Hottest day (TXx)
1951
39.4 C (102.9 F)
1952
38.0 C (100.4 F)
1953
42.5 C (108.5 F)
1954
41.3 C (106.3 F)
1955
45.7 C (114.3 F)
1956
38.7 C (101.7 F)
1957
42.2 C (108.0 F)
1958
37.9 C (100.2 F)
1959
38.2 C (100.8 F)
1960
n/a
1961
40.3 C (104.5 F)
1962
38.5 C (101.3 F)
1963
39.5 C (103.1 F)
1964
38.4 C (101.1 F)
1965
40.0 C (104.0 F)
1966
36.9 C (98.4 F)
1967
41.0 C (105.8 F)
1968
40.0 C (104.0 F)
1969
41.9 C (107.4 F)
1970
42.0 C (107.6 F)
1971
42.8 C (109.0 F)
1972
40.0 C (104.0 F)
1973
37.2 C (99.0 F)
1974
36.9 C (98.4 F)
1975
41.1 C (106.0 F)
1976
39.7 C (103.5 F)
1977
38.0 C (100.4 F)
1978
37.2 C (99.0 F)
1979
36.3 C (97.3 F)
1980
42.1 C (107.8 F)
1981
39.0 C (102.2 F)
1982
40.9 C (105.6 F)
1983
38.5 C (101.3 F)
1984
38.0 C (100.4 F)
1985
36.7 C (98.1 F)
1986
39.3 C (102.7 F)
1987
37.7 C (99.9 F)
1988
39.5 C (103.1 F)
1989
41.0 C (105.8 F)
1990
40.5 C (104.9 F)
1991
38.0 C (100.4 F)
1992
37.3 C (99.1 F)
1993
37.3 C (99.1 F)
1994
41.2 C (106.2 F)
1995
40.5 C (104.9 F)
1996
37.0 C (98.6 F)
1997
36.3 C (97.3 F)
1998
38.3 C (100.9 F)
1999
39.7 C (103.5 F)
2000
38.7 C (101.7 F)
2001
40.2 C (104.4 F)
2002
36.5 C (97.7 F)
2003
39.7 C (103.5 F)
2004
37.2 C (99.0 F)
2005
37.5 C (99.5 F)
2006
40.8 C (105.4 F)
2007
39.7 C (103.5 F)
2008
37.7 C (99.9 F)
2009
39.0 C (102.2 F)
2010
41.7 C (107.1 F)
2011
38.5 C (101.3 F)
2012
41.5 C (106.7 F)
2013
40.4 C (104.7 F)
2014
44.9 C (112.8 F)
2015
40.9 C (105.6 F)
2016
38.3 C (100.9 F)
2017
43.3 C (109.9 F)
2018
40.6 C (105.1 F)
2019
41.2 C (106.2 F)
2020
38.6 C (101.5 F)
2021
38.4 C (101.1 F)
2022
41.6 C (106.9 F)
2023
40.7 C (105.3 F)
2024
42.2 C (108.0 F)
2025
41.4 C (106.5 F)
Coldest night (TNn)
The coldest night of the year at Santa Rosa Aero, 1951 to 2025. The record is -12.7 C (9.1 F) in 1967, marked on the chart; the median year is -7.0 C (19.4 F).
Coldest night (TNn) at Santa Rosa Aero by year
Year
Coldest night (TNn)
1951
-6.0 C (21.2 F)
1952
-7.6 C (18.3 F)
1953
-12.3 C (9.9 F)
1954
-6.0 C (21.2 F)
1955
-9.1 C (15.6 F)
1956
-6.9 C (19.6 F)
1957
-8.7 C (16.3 F)
1958
-7.0 C (19.4 F)
1959
-5.5 C (22.1 F)
1960
-8.8 C (16.2 F)
1961
-8.5 C (16.7 F)
1962
-8.9 C (16.0 F)
1963
-8.6 C (16.5 F)
1964
-9.5 C (14.9 F)
1965
-8.2 C (17.2 F)
1966
-8.5 C (16.7 F)
1967
-12.7 C (9.1 F)
1968
-6.9 C (19.6 F)
1969
-7.2 C (19.0 F)
1970
-11.2 C (11.8 F)
1971
-9.0 C (15.8 F)
1972
-9.0 C (15.8 F)
1973
-6.4 C (20.5 F)
1974
-8.8 C (16.2 F)
1975
-9.1 C (15.6 F)
1976
-8.8 C (16.2 F)
1977
-5.6 C (21.9 F)
1978
-6.6 C (20.1 F)
1979
-10.0 C (14.0 F)
1980
-7.6 C (18.3 F)
1981
-6.2 C (20.8 F)
1982
-6.1 C (21.0 F)
1983
-5.8 C (21.6 F)
1984
-7.0 C (19.4 F)
1985
-6.3 C (20.7 F)
1986
-6.2 C (20.8 F)
1987
-7.3 C (18.9 F)
1988
-11.3 C (11.7 F)
1989
-7.7 C (18.1 F)
1990
-8.0 C (17.6 F)
1991
-7.5 C (18.5 F)
1992
-5.5 C (22.1 F)
1993
-9.0 C (15.8 F)
1994
-6.0 C (21.2 F)
1995
-8.7 C (16.3 F)
1996
-5.8 C (21.6 F)
1997
-5.3 C (22.5 F)
1998
-5.8 C (21.6 F)
1999
-8.8 C (16.2 F)
2000
-7.5 C (18.5 F)
2001
-5.8 C (21.6 F)
2002
-8.9 C (16.0 F)
2003
-7.5 C (18.5 F)
2004
-4.0 C (24.8 F)
2005
-5.1 C (22.8 F)
2006
-7.9 C (17.8 F)
2007
-10.9 C (12.4 F)
2008
-5.6 C (21.9 F)
2009
-5.1 C (22.8 F)
2010
-9.2 C (15.4 F)
2011
-5.6 C (21.9 F)
2012
-6.6 C (20.1 F)
2013
-6.7 C (19.9 F)
2014
-4.7 C (23.5 F)
2015
-7.0 C (19.4 F)
2016
-3.1 C (26.4 F)
2017
-4.4 C (24.1 F)
2018
-5.4 C (22.3 F)
2019
-6.9 C (19.6 F)
2020
-5.5 C (22.1 F)
2021
-4.5 C (23.9 F)
2022
-6.7 C (19.9 F)
2023
-5.0 C (23.0 F)
2024
-6.6 C (20.1 F)
2025
-7.3 C (18.9 F)
Wettest day (Rx1day)
The wettest day of the year at Santa Rosa Aero, 1951 to 2025. The record is 329.9 mm (13.0 in) in 1980, marked on the chart; the median year is 63.5 mm (2.5 in).
Wettest day (Rx1day) at Santa Rosa Aero by year
Year
Wettest day (Rx1day)
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
n/a
1964
n/a
1965
4.1 mm (0.16 in)
1966
n/a
1967
47.0 mm (1.9 in)
1968
54.1 mm (2.1 in)
1969
n/a
1970
n/a
1971
n/a
1972
n/a
1973
45.0 mm (1.8 in)
1974
140.0 mm (5.5 in)
1975
110.0 mm (4.3 in)
1976
150.1 mm (5.9 in)
1977
70.1 mm (2.8 in)
1978
51.1 mm (2.0 in)
1979
59.9 mm (2.4 in)
1980
329.9 mm (13.0 in)
1981
33.0 mm (1.3 in)
1982
71.1 mm (2.8 in)
1983
249.9 mm (9.8 in)
1984
48.0 mm (1.9 in)
1985
0.0 mm (0.00 in)
1986
0.0 mm (0.00 in)
1987
70.1 mm (2.8 in)
1988
71.1 mm (2.8 in)
1989
99.1 mm (3.9 in)
1990
101.1 mm (4.0 in)
1991
46.0 mm (1.8 in)
1992
83.1 mm (3.3 in)
1993
80.0 mm (3.1 in)
1994
87.9 mm (3.5 in)
1995
190.0 mm (7.5 in)
1996
88.9 mm (3.5 in)
1997
72.9 mm (2.9 in)
1998
63.0 mm (2.5 in)
1999
92.7 mm (3.6 in)
2000
145.0 mm (5.7 in)
2001
110.0 mm (4.3 in)
2002
64.0 mm (2.5 in)
2003
41.9 mm (1.6 in)
2004
49.0 mm (1.9 in)
2005
43.9 mm (1.7 in)
2006
84.1 mm (3.3 in)
2007
51.1 mm (2.0 in)
2008
43.9 mm (1.7 in)
2009
46.0 mm (1.8 in)
2010
192.0 mm (7.6 in)
2011
165.1 mm (6.5 in)
2012
61.0 mm (2.4 in)
2013
46.0 mm (1.8 in)
2014
83.1 mm (3.3 in)
2015
135.9 mm (5.4 in)
2016
55.9 mm (2.2 in)
2017
168.9 mm (6.6 in)
2018
26.9 mm (1.1 in)
2019
37.1 mm (1.5 in)
2020
62.0 mm (2.4 in)
2021
86.1 mm (3.4 in)
2022
56.9 mm (2.2 in)
2023
63.0 mm (2.5 in)
2024
48.0 mm (1.9 in)
2025
42.9 mm (1.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at Santa Rosa Aero, 1951 to 2025. The record is 353.9 mm (13.9 in) in 2017, marked on the chart; the median year is 82.8 mm (3.3 in).
Wettest five days (Rx5day) at Santa Rosa Aero by year
Year
Wettest five days (Rx5day)
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
n/a
1964
n/a
1965
n/a
1966
n/a
1967
83.6 mm (3.3 in)
1968
56.6 mm (2.2 in)
1969
n/a
1970
n/a
1971
n/a
1972
n/a
1973
74.9 mm (2.9 in)
1974
148.9 mm (5.9 in)
1975
166.2 mm (6.5 in)
1976
162.0 mm (6.4 in)
1977
111.0 mm (4.4 in)
1978
57.2 mm (2.3 in)
1979
80.0 mm (3.1 in)
1980
351.0 mm (13.8 in)
1981
68.8 mm (2.7 in)
1982
62.0 mm (2.4 in)
1983
84.8 mm (3.3 in)
1984
26.2 mm (1.0 in)
1985
0.0 mm (0.00 in)
1986
n/a
1987
110.8 mm (4.4 in)
1988
166.6 mm (6.6 in)
1989
138.0 mm (5.4 in)
1990
56.2 mm (2.2 in)
1991
87.1 mm (3.4 in)
1992
115.1 mm (4.5 in)
1993
57.9 mm (2.3 in)
1994
89.9 mm (3.5 in)
1995
86.9 mm (3.4 in)
1996
215.9 mm (8.5 in)
1997
73.9 mm (2.9 in)
1998
78.0 mm (3.1 in)
1999
121.7 mm (4.8 in)
2000
28.1 mm (1.1 in)
2001
12.8 mm (0.5 in)
2002
69.6 mm (2.7 in)
2003
44.9 mm (1.8 in)
2004
94.0 mm (3.7 in)
2005
47.8 mm (1.9 in)
2006
50.0 mm (2.0 in)
2007
84.1 mm (3.3 in)
2008
82.0 mm (3.2 in)
2009
41.3 mm (1.6 in)
2010
49.0 mm (1.9 in)
2011
88.1 mm (3.5 in)
2012
87.9 mm (3.5 in)
2013
64.8 mm (2.6 in)
2014
126.3 mm (5.0 in)
2015
140.9 mm (5.5 in)
2016
84.7 mm (3.3 in)
2017
353.9 mm (13.9 in)
2018
18.6 mm (0.7 in)
2019
37.1 mm (1.5 in)
2020
93.7 mm (3.7 in)
2021
129.0 mm (5.1 in)
2022
67.8 mm (2.7 in)
2023
73.2 mm (2.9 in)
2024
104.7 mm (4.1 in)
2025
79.0 mm (3.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Santa Rosa Aero, 1951 to 2025. The record is 24 days in 1979, marked on the chart; the median year is 6 days.
Longest dry spell (CDD) at Santa Rosa Aero by year
Year
Longest dry spell (CDD)
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
n/a
1964
n/a
1965
1 day
1966
n/a
1967
2 days
1968
3 days
1969
n/a
1970
n/a
1971
n/a
1972
n/a
1973
18 days
1974
18 days
1975
3 days
1976
7 days
1977
15 days
1978
11 days
1979
24 days
1980
21 days
1981
22 days
1982
5 days
1983
15 days
1984
8 days
1985
15 days
1986
4 days
1987
5 days
1988
7 days
1989
7 days
1990
5 days
1991
4 days
1992
7 days
1993
7 days
1994
6 days
1995
10 days
1996
9 days
1997
15 days
1998
9 days
1999
8 days
2000
4 days
2001
3 days
2002
11 days
2003
24 days
2004
14 days
2005
15 days
2006
3 days
2007
5 days
2008
4 days
2009
3 days
2010
6 days
2011
2 days
2012
3 days
2013
3 days
2014
4 days
2015
6 days
2016
3 days
2017
7 days
2018
4 days
2019
3 days
2020
3 days
2021
3 days
2022
4 days
2023
4 days
2024
4 days
2025
2 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
44 years with a frost
Across 44 years with a frost, the median last spring frost at Santa Rosa Aero falls on 23 September and the median first autumn frost on 2 May, which leaves a median of 216 days between them.
Fitted over all years, the growing season changes by +8.8 days per decade at this station.
Frost dates and growing season at Santa Rosa Aero
Measure
Median, all years
Earliest period
Recent period (1974 to 2003)
Recent against earliest
Fitted trend
Last spring frost
23 September
n/a
22 September
n/a
-3.1 days per decade
First autumn frost
2 May
n/a
5 May
n/a
+5.7 days per decade
Growing days
216 days
n/a
222 days
n/a
+8.8 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.
Download the Data
Data for Santa Rosa Aero standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Santa Rosa Aero 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.