Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Rubicon Sec. 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 Rubicon Sec, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
37.5 C (99.5 F)
0.0 C (32.0 F)
n/a
n/a
Feb
36.7 C (98.1 F)
0.2 C (32.4 F)
n/a
n/a
Mar
32.9 C (91.2 F)
0.1 C (32.2 F)
n/a
n/a
Apr
28.0 C (82.4 F)
0.0 C (32.0 F)
n/a
n/a
May
22.0 C (71.6 F)
-2.0 C (28.4 F)
n/a
n/a
Jun
16.8 C (62.2 F)
-2.6 C (27.3 F)
n/a
n/a
Jul
16.7 C (62.1 F)
-3.5 C (25.7 F)
n/a
n/a
Aug
18.5 C (65.3 F)
-5.6 C (21.9 F)
n/a
n/a
Sep
23.9 C (75.0 F)
-2.9 C (26.8 F)
n/a
n/a
Oct
26.7 C (80.1 F)
-1.8 C (28.8 F)
n/a
n/a
Nov
32.9 C (91.2 F)
-0.4 C (31.3 F)
n/a
n/a
Dec
32.9 C (91.2 F)
1.0 C (33.8 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Rubicon Sec still stand. 1982 holds the most, with 58.
Standing records at Rubicon Sec by the year they were set
Year set
Standing records
1957
57
1958
32
1959
39
1960
56
1961
44
1962
46
1963
39
1964
57
1965
48
1966
50
1967
48
1968
43
1969
46
1970
40
1971
36
1972
32
1973
36
1974
15
1975
46
1976
15
1977
42
1978
35
1979
29
1980
40
1981
34
1982
58
1983
56
1984
40
1985
34
1986
41
1987
51
1988
54
1989
18
1990
33
1991
40
1992
22
1993
12
All-Time Record Progression
1 new records
1 all-time records were set at Rubicon Sec between 29 June 1980 and 29 June 1980. Each dot is a new record.
When Rubicon Sec set new all-time records
Date
Kind
Detail
1980-06-29
Record daily precipitation
Record daily precipitation 154.0 mm (6.1 in)
Wettest Day of Each Month
Jun: 154.0 mm (6.1 in)
The wettest day on record for each calendar month at Rubicon Sec. The most was 154.0 mm (6.1 in) on 29 June 1980.
Record daily precipitation for each month at Rubicon Sec
Month
Record daily precipitation (mm)
Date
Jan
104.4 mm (4.1 in)
19 January 1956
Feb
70.1 mm (2.8 in)
21 February 1973
Mar
76.0 mm (3.0 in)
21 March 1989
Apr
133.6 mm (5.3 in)
23 April 1960
May
97.0 mm (3.8 in)
17 May 1975
Jun
154.0 mm (6.1 in)
29 June 1980
Jul
70.4 mm (2.8 in)
23 July 1951
Aug
75.8 mm (3.0 in)
21 August 1975
Sep
103.1 mm (4.1 in)
23 September 1955
Oct
74.6 mm (2.9 in)
8 October 1975
Nov
90.4 mm (3.6 in)
21 November 1954
Dec
54.6 mm (2.1 in)
2 December 1969
Period of Record Coverage
1957 to 1993
Complete yearUnder 90 percent of days
37 years of record at Rubicon Sec, 1957 to 1993. 1 years have data for under 90 percent of days and are left out of rankings: 1993.
Cooler than the station meanWarmer than the station mean
One stripe for each of 35 complete years at Rubicon Sec, 1957 to 1992. Blue stripes are years cooler than the station's own mean of 11.2 C (52.2 F); red stripes are warmer. The coolest year was 1964, at 10.4 C (50.6 F), and the warmest was 1988, at 12.1 C (53.8 F). The strongest colour marks a difference of 0.9 C (1.6 F).
Annual mean temperature at Rubicon Sec as warming stripes, 1957 to 1992
Year
Annual mean temperature
Difference from the station mean
1957
10.9 C
-0.29 C
1958
10.7 C
-0.51 C
1959
11.8 C
+0.63 C
1960
10.8 C
-0.43 C
1961
12.1 C
+0.90 C
1962
11.1 C
-0.15 C
1963
11.3 C
+0.05 C
1964
10.4 C
-0.86 C
1965
11.1 C
-0.08 C
1966
10.6 C
-0.64 C
1967
11.3 C
+0.12 C
1969
11.2 C
-0.02 C
1970
10.7 C
-0.55 C
1971
11.0 C
-0.20 C
1972
11.6 C
+0.41 C
1973
11.4 C
+0.23 C
1974
11.2 C
-0.06 C
1975
11.4 C
+0.17 C
1976
11.0 C
-0.26 C
1977
11.1 C
-0.09 C
1978
11.1 C
-0.08 C
1979
11.4 C
+0.16 C
1980
11.7 C
+0.45 C
1981
11.7 C
+0.50 C
1982
11.9 C
+0.64 C
1983
11.5 C
+0.27 C
1984
10.5 C
-0.67 C
1985
11.4 C
+0.18 C
1986
10.5 C
-0.69 C
1987
10.9 C
-0.28 C
1988
12.1 C
+0.90 C
1989
11.4 C
+0.16 C
1990
11.6 C
+0.41 C
1991
11.5 C
+0.31 C
1992
10.8 C
-0.46 C
The fitted trend in annual mean temperature here over 1957 to 1992 is 0.1 C (-0.1 to 0.2) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.4) per decade. The slope is a straight line fitted to 35 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Rubicon Sec
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.1 to 0.2) per decade
0.1 F (-0.1 to 0.4) per decade
1957 to 1992
35
Not clearly different from zero
Mean daily maximum
-0.02 C (-0.20 to 0.17) per decade
-0.03 F (-0.36 to 0.30) per decade
1957 to 1992
35
Not clearly different from zero
Mean daily minimum
0.17 C (0.04 to 0.30) per decade
0.3 F (0.1 to 0.5) per decade
1957 to 1992
35
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
1943 to 1993
Yearly extremes at Rubicon Sec: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
37.5 C (99.5 F)
1982
32.8 C (91.0 F)
37
Coldest night (TNn)
-5.6 C (21.9 F)
1960
-1.6 C (29.1 F)
37
Wettest day (Rx1day)
154.0 mm (6.1 in)
1980
63.2 mm (2.5 in)
51
Wettest five days (Rx5day)
317.7 mm (12.5 in)
1980
146.8 mm (5.8 in)
51
Longest dry spell (CDD)
39 days
1953
23 days
51
Hottest day (TXx)
The hottest day of the year at Rubicon Sec, 1943 to 1993. The record is 37.5 C (99.5 F) in 1982, marked on the chart; the median year is 32.8 C (91.0 F).
Hottest day (TXx) at Rubicon Sec by year
Year
Hottest day (TXx)
1943
n/a
1944
n/a
1945
n/a
1946
n/a
1947
n/a
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
33.1 C (91.6 F)
1958
29.4 C (84.9 F)
1959
35.0 C (95.0 F)
1960
32.2 C (90.0 F)
1961
34.4 C (93.9 F)
1962
32.8 C (91.0 F)
1963
31.1 C (88.0 F)
1964
33.3 C (91.9 F)
1965
32.9 C (91.2 F)
1966
31.9 C (89.4 F)
1967
32.2 C (90.0 F)
1968
36.7 C (98.1 F)
1969
31.4 C (88.5 F)
1970
31.7 C (89.1 F)
1971
31.7 C (89.1 F)
1972
32.9 C (91.2 F)
1973
33.5 C (92.3 F)
1974
29.6 C (85.3 F)
1975
31.7 C (89.1 F)
1976
32.0 C (89.6 F)
1977
34.3 C (93.7 F)
1978
32.1 C (89.8 F)
1979
33.6 C (92.5 F)
1980
34.3 C (93.7 F)
1981
34.3 C (93.7 F)
1982
37.5 C (99.5 F)
1983
35.4 C (95.7 F)
1984
28.0 C (82.4 F)
1985
34.0 C (93.2 F)
1986
31.4 C (88.5 F)
1987
32.9 C (91.2 F)
1988
34.3 C (93.7 F)
1989
30.1 C (86.2 F)
1990
32.0 C (89.6 F)
1991
33.0 C (91.4 F)
1992
31.5 C (88.7 F)
1993
31.6 C (88.9 F)
Coldest night (TNn)
The coldest night of the year at Rubicon Sec, 1943 to 1993. The record is -5.6 C (21.9 F) in 1960, marked on the chart; the median year is -1.6 C (29.1 F).
Coldest night (TNn) at Rubicon Sec by year
Year
Coldest night (TNn)
1943
n/a
1944
n/a
1945
n/a
1946
n/a
1947
n/a
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
-1.7 C (28.9 F)
1958
-1.7 C (28.9 F)
1959
-1.7 C (28.9 F)
1960
-5.6 C (21.9 F)
1961
-1.1 C (30.0 F)
1962
-2.8 C (27.0 F)
1963
-1.7 C (28.9 F)
1964
-2.2 C (28.0 F)
1965
-2.3 C (27.9 F)
1966
-2.8 C (27.0 F)
1967
-2.9 C (26.8 F)
1968
-1.2 C (29.8 F)
1969
-2.9 C (26.8 F)
1970
-1.2 C (29.8 F)
1971
-0.9 C (30.4 F)
1972
-1.0 C (30.2 F)
1973
-2.6 C (27.3 F)
1974
-3.6 C (25.5 F)
1975
-1.2 C (29.8 F)
1976
-1.6 C (29.1 F)
1977
-2.0 C (28.4 F)
1978
-1.9 C (28.6 F)
1979
-1.0 C (30.2 F)
1980
-0.2 C (31.6 F)
1981
-0.9 C (30.4 F)
1982
-1.9 C (28.6 F)
1983
-1.4 C (29.5 F)
1984
-1.8 C (28.8 F)
1985
-1.5 C (29.3 F)
1986
-3.5 C (25.7 F)
1987
-1.0 C (30.2 F)
1988
0.0 C (32.0 F)
1989
-0.5 C (31.1 F)
1990
-1.6 C (29.1 F)
1991
-1.5 C (29.3 F)
1992
-1.0 C (30.2 F)
1993
1.1 C (34.0 F)
Wettest day (Rx1day)
The wettest day of the year at Rubicon Sec, 1943 to 1993. The record is 154.0 mm (6.1 in) in 1980, marked on the chart; the median year is 63.2 mm (2.5 in).
Wettest day (Rx1day) at Rubicon Sec by year
Year
Wettest day (Rx1day)
1943
23.6 mm (0.9 in)
1944
63.5 mm (2.5 in)
1945
57.7 mm (2.3 in)
1946
63.2 mm (2.5 in)
1947
68.3 mm (2.7 in)
1948
54.9 mm (2.2 in)
1949
46.5 mm (1.8 in)
1950
67.8 mm (2.7 in)
1951
70.4 mm (2.8 in)
1952
70.9 mm (2.8 in)
1953
62.7 mm (2.5 in)
1954
90.4 mm (3.6 in)
1955
103.1 mm (4.1 in)
1956
104.4 mm (4.1 in)
1957
47.0 mm (1.9 in)
1958
53.8 mm (2.1 in)
1959
40.1 mm (1.6 in)
1960
133.6 mm (5.3 in)
1961
61.2 mm (2.4 in)
1962
82.6 mm (3.3 in)
1963
61.7 mm (2.4 in)
1964
44.7 mm (1.8 in)
1965
50.5 mm (2.0 in)
1966
51.8 mm (2.0 in)
1967
32.3 mm (1.3 in)
1968
92.2 mm (3.6 in)
1969
59.4 mm (2.3 in)
1970
69.3 mm (2.7 in)
1971
69.9 mm (2.8 in)
1972
52.1 mm (2.1 in)
1973
70.1 mm (2.8 in)
1974
123.8 mm (4.9 in)
1975
97.0 mm (3.8 in)
1976
53.3 mm (2.1 in)
1977
87.0 mm (3.4 in)
1978
79.0 mm (3.1 in)
1979
55.6 mm (2.2 in)
1980
154.0 mm (6.1 in)
1981
69.8 mm (2.7 in)
1982
47.2 mm (1.9 in)
1983
59.4 mm (2.3 in)
1984
98.6 mm (3.9 in)
1985
76.4 mm (3.0 in)
1986
63.0 mm (2.5 in)
1987
55.6 mm (2.2 in)
1988
92.2 mm (3.6 in)
1989
76.0 mm (3.0 in)
1990
52.0 mm (2.0 in)
1991
92.6 mm (3.6 in)
1992
47.0 mm (1.9 in)
1993
52.4 mm (2.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Rubicon Sec, 1943 to 1993. The record is 317.7 mm (12.5 in) in 1980, marked on the chart; the median year is 146.8 mm (5.8 in).
Wettest five days (Rx5day) at Rubicon Sec by year
Year
Wettest five days (Rx5day)
1943
34.9 mm (1.4 in)
1944
156.4 mm (6.2 in)
1945
152.4 mm (6.0 in)
1946
99.1 mm (3.9 in)
1947
126.4 mm (5.0 in)
1948
114.8 mm (4.5 in)
1949
104.1 mm (4.1 in)
1950
143.5 mm (5.6 in)
1951
196.1 mm (7.7 in)
1952
204.9 mm (8.1 in)
1953
184.2 mm (7.3 in)
1954
172.0 mm (6.8 in)
1955
149.9 mm (5.9 in)
1956
181.5 mm (7.1 in)
1957
125.2 mm (4.9 in)
1958
152.0 mm (6.0 in)
1959
79.5 mm (3.1 in)
1960
193.3 mm (7.6 in)
1961
138.4 mm (5.4 in)
1962
212.6 mm (8.4 in)
1963
161.3 mm (6.4 in)
1964
161.4 mm (6.4 in)
1965
109.8 mm (4.3 in)
1966
124.7 mm (4.9 in)
1967
81.0 mm (3.2 in)
1968
165.9 mm (6.5 in)
1969
104.1 mm (4.1 in)
1970
120.6 mm (4.7 in)
1971
181.4 mm (7.1 in)
1972
109.9 mm (4.3 in)
1973
164.9 mm (6.5 in)
1974
193.2 mm (7.6 in)
1975
221.0 mm (8.7 in)
1976
173.5 mm (6.8 in)
1977
169.5 mm (6.7 in)
1978
108.2 mm (4.3 in)
1979
146.4 mm (5.8 in)
1980
317.7 mm (12.5 in)
1981
168.7 mm (6.6 in)
1982
89.6 mm (3.5 in)
1983
119.2 mm (4.7 in)
1984
125.8 mm (5.0 in)
1985
129.4 mm (5.1 in)
1986
150.6 mm (5.9 in)
1987
146.8 mm (5.8 in)
1988
176.0 mm (6.9 in)
1989
119.0 mm (4.7 in)
1990
143.5 mm (5.6 in)
1991
212.2 mm (8.4 in)
1992
122.4 mm (4.8 in)
1993
106.8 mm (4.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Rubicon Sec, 1943 to 1993. The record is 39 days in 1953, marked on the chart; the median year is 23 days.
Longest dry spell (CDD) at Rubicon Sec by year
Year
Longest dry spell (CDD)
1943
13 days
1944
22 days
1945
34 days
1946
13 days
1947
27 days
1948
25 days
1949
20 days
1950
26 days
1951
26 days
1952
23 days
1953
39 days
1954
24 days
1955
18 days
1956
20 days
1957
18 days
1958
27 days
1959
23 days
1960
14 days
1961
24 days
1962
24 days
1963
29 days
1964
28 days
1965
31 days
1966
17 days
1967
26 days
1968
26 days
1969
15 days
1970
23 days
1971
21 days
1972
28 days
1973
15 days
1974
17 days
1975
25 days
1976
20 days
1977
18 days
1978
15 days
1979
13 days
1980
27 days
1981
17 days
1982
20 days
1983
39 days
1984
18 days
1985
20 days
1986
31 days
1987
19 days
1988
25 days
1989
21 days
1990
22 days
1991
37 days
1992
31 days
1993
17 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
34 years with a frost
Across 34 years with a frost, the median last spring frost at Rubicon Sec falls on 17 September and the median first autumn frost on 16 June, which leaves a median of 266 days between them.
Fitted over all years, the growing season changes by +7.6 days per decade at this station.
Frost dates and growing season at Rubicon Sec
Measure
Median, all years
Earliest period
Recent period (1961 to 1991)
Recent against earliest
Fitted trend
Last spring frost
17 September
n/a
15 September
n/a
-3.8 days per decade
First autumn frost
16 June
n/a
17 June
n/a
+3.8 days per decade
Growing days
266 days
n/a
268 days
n/a
+7.6 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
49 years, 1944 to 1992
A day with at least 65.3 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 161.3 mm (6.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Rubicon Sec: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
65.3 mm (2.6 in)
5 years
86.4 mm (3.4 in)
10 years
102.0 mm (4.0 in)
25 years
123.9 mm (4.9 in)
50 years
141.9 mm (5.6 in)
Longer than the 49 years of record
100 years
161.3 mm (6.4 in)
Longer than the 49 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, 49 years of values from 1944 to 1992.
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: 154.0 mm (6.1 in) in 1980; 133.6 mm (5.3 in) in 1960; 123.8 mm (4.9 in) in 1974.
Download the Data
Data for Rubicon Sec standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Rubicon Sec 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.