Record envelope, standing records and threshold days for Seneca (USC00357675), Oregon, United States, with 114 years of record.
Key Facts for Seneca
Seneca (USC00357675) is a weather station in Oregon, United States at 44.14 latitude and -118.97 longitude, 1,420 m (4,660 ft) above sea level.
The station reports from 1908 to 2021, 114 years of record.
1,464 records set at Seneca still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Seneca set a daily record high maximum temperature of 35.6 C (96.1 F) on 15 July 2021.
About the Station
Location: Oregon, United States, 44.14 latitude, -118.97 longitude.
Elevation: 1,420 m (4,660 ft).
Period of record: 1908 to 2021, 114 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Seneca. 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 Seneca, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
14.4 C (57.9 F)
-41.7 C (-43.1 F)
n/a
n/a
Feb
17.8 C (64.0 F)
-47.8 C (-54.0 F)
n/a
n/a
Mar
23.3 C (73.9 F)
-32.2 C (-26.0 F)
n/a
n/a
Apr
28.3 C (82.9 F)
-16.7 C (1.9 F)
n/a
n/a
May
31.7 C (89.1 F)
-14.4 C (6.1 F)
n/a
n/a
Jun
40.0 C (104.0 F)
-8.9 C (16.0 F)
n/a
n/a
Jul
40.0 C (104.0 F)
-7.2 C (19.0 F)
n/a
n/a
Aug
40.0 C (104.0 F)
-10.6 C (12.9 F)
n/a
n/a
Sep
37.8 C (100.0 F)
-17.2 C (1.0 F)
n/a
n/a
Oct
32.2 C (90.0 F)
-23.9 C (-11.0 F)
n/a
n/a
Nov
22.2 C (72.0 F)
-35.0 C (-31.0 F)
n/a
n/a
Dec
15.0 C (59.0 F)
-40.6 C (-41.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Seneca still stand. 1934 holds the most, with 44.
Standing records at Seneca by the year they were set
Year set
Standing records
1912
16
1913
25
1931
36
1932
18
1933
20
1934
44
1935
26
1936
16
1937
31
1938
13
1939
10
1940
18
1941
8
1942
9
1943
9
1944
8
1948
2
1949
5
1950
18
1951
13
1952
14
1953
13
1954
17
1955
22
1956
25
1957
18
1958
13
1959
20
1960
21
1961
11
1962
30
1963
17
1964
15
1965
15
1966
22
1967
15
1968
26
1969
13
1970
18
1971
28
1972
26
1973
10
1974
11
1975
13
1976
9
1977
13
1978
16
1979
15
1980
11
1981
13
1982
15
1983
17
1984
21
1985
42
1986
19
1987
23
1988
30
1989
19
1990
19
1991
10
1992
25
1993
16
1994
9
1995
17
1996
21
1997
11
1998
10
1999
19
2000
25
2001
10
2002
19
2003
17
2004
6
2005
10
2006
17
2007
4
2008
10
2009
13
2010
14
2011
8
2012
6
2013
15
2014
4
2015
23
2016
9
2017
10
2018
9
2019
6
2020
18
2021
13
All-Time Record Progression
4 new records
4 all-time records were set at Seneca between 3 August 1965 and 22 June 1988. Each dot is a new record.
When Seneca set new all-time records
Date
Kind
Detail
1965-08-03
Record daily precipitation
Record daily precipitation 64.8 mm (2.6 in)
1978-12-30
Record low maximum temperature
Record low maximum temperature -21.1 C (-6.0 F)
1988-06-20
Record high minimum temperature
Record high minimum temperature 18.3 C (64.9 F)
1988-06-22
Record high minimum temperature
Record high minimum temperature 18.9 C (66.0 F)
Wettest Day of Each Month
Aug: 64.8 mm (2.6 in)
The wettest day on record for each calendar month at Seneca. The most was 64.8 mm (2.6 in) on 3 August 1965.
Record daily precipitation for each month at Seneca
Month
Record daily precipitation (mm)
Date
Jan
25.4 mm (1.0 in)
12 January 2015
Feb
36.6 mm (1.4 in)
10 February 1942
Mar
26.7 mm (1.1 in)
24 March 1952
Apr
27.9 mm (1.1 in)
4 April 1954
May
32.8 mm (1.3 in)
10 May 1989
Jun
31.8 mm (1.3 in)
25 June 2010
Jul
35.6 mm (1.4 in)
12 July 2015
Aug
64.8 mm (2.6 in)
3 August 1965
Sep
42.4 mm (1.7 in)
19 September 1937
Oct
31.5 mm (1.2 in)
3 October 1967
Nov
27.9 mm (1.1 in)
20 November 1966
Dec
29.5 mm (1.2 in)
31 December 1996
Period of Record Coverage
1912 to 2021
Complete yearUnder 90 percent of days
91 years of record at Seneca, 1912 to 2021. 26 years have data for under 90 percent of days and are left out of rankings: 1912, 1913, 1931, 1941, 1943, 1944, 1947, 1948 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 60 complete years at Seneca, 1933 to 2019. Blue stripes are years cooler than the station's own mean of 4.6 C (40.3 F); red stripes are warmer. The coolest year was 1985, at 1.8 C (35.3 F), and the warmest was 1934, at 6.8 C (44.3 F). The strongest colour marks a difference of 2.8 C (5.0 F).
Annual mean temperature at Seneca as warming stripes, 1933 to 2019
Year
Annual mean temperature
Difference from the station mean
1933
4.9 C
+0.34 C
1934
6.8 C
+2.25 C
1935
5.1 C
+0.52 C
1936
3.2 C
-1.41 C
1938
4.6 C
-0.01 C
1939
5.1 C
+0.50 C
1942
4.0 C
-0.64 C
1951
4.5 C
-0.14 C
1952
3.8 C
-0.75 C
1953
5.0 C
+0.43 C
1954
4.7 C
+0.09 C
1955
3.9 C
-0.69 C
1956
5.1 C
+0.53 C
1957
4.0 C
-0.57 C
1958
5.4 C
+0.82 C
1959
4.7 C
+0.11 C
1960
4.1 C
-0.45 C
1961
5.2 C
+0.61 C
1962
4.3 C
-0.27 C
1963
5.3 C
+0.67 C
1964
3.5 C
-1.13 C
1966
4.3 C
-0.34 C
1967
4.7 C
+0.13 C
1968
4.6 C
+0.04 C
1969
4.0 C
-0.60 C
1970
4.0 C
-0.57 C
1971
3.5 C
-1.06 C
1972
3.6 C
-0.95 C
1973
4.9 C
+0.26 C
1977
4.9 C
+0.28 C
1978
4.1 C
-0.46 C
1981
5.0 C
+0.43 C
1982
3.7 C
-0.91 C
1983
4.7 C
+0.07 C
1984
3.2 C
-1.38 C
1985
1.8 C
-2.75 C
1986
5.2 C
+0.57 C
1987
4.8 C
+0.23 C
1989
4.3 C
-0.28 C
1990
5.1 C
+0.55 C
1991
5.1 C
+0.49 C
1992
5.6 C
+0.99 C
1993
3.3 C
-1.28 C
1994
5.1 C
+0.47 C
1995
5.6 C
+1.04 C
1996
5.3 C
+0.72 C
1997
5.5 C
+0.92 C
1998
5.4 C
+0.79 C
1999
4.2 C
-0.38 C
2000
4.9 C
+0.31 C
2001
4.6 C
+0.04 C
2002
4.8 C
+0.18 C
2003
6.2 C
+1.61 C
2005
4.9 C
+0.26 C
2006
4.9 C
+0.26 C
2008
3.4 C
-1.21 C
2010
5.0 C
+0.36 C
2011
4.0 C
-0.61 C
2012
5.1 C
+0.51 C
2019
5.0 C
+0.44 C
The fitted trend in annual mean temperature here over 1933 to 2019 is 0.02 C (-0.07 to 0.11) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.04 F (-0.13 to 0.21) per decade. The slope is a straight line fitted to 60 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Seneca
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.02 C (-0.07 to 0.11) per decade
0.04 F (-0.13 to 0.21) per decade
1933 to 2019
60
Not clearly different from zero
Mean daily maximum
-0.2 C (-0.3 to -0.1) per decade
-0.3 F (-0.5 to -0.1) per decade
1933 to 2019
60
Fall
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.4 F (0.2 to 0.6) per decade
1933 to 2019
60
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
1908 to 2021
Yearly extremes at Seneca: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.0 C (104.0 F)
1933
35.0 C (95.0 F)
91
Coldest night (TNn)
-47.8 C (-54.0 F)
1933
-30.0 C (-22.0 F)
91
Wettest day (Rx1day)
64.8 mm (2.6 in)
1965
21.1 mm (0.8 in)
95
Wettest five days (Rx5day)
74.8 mm (2.9 in)
1936
34.1 mm (1.3 in)
95
Longest dry spell (CDD)
92 days
1935
41 days
95
Hottest day (TXx)
The hottest day of the year at Seneca, 1908 to 2021. The record is 40.0 C (104.0 F) in 1933, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Seneca by year
Year
Hottest day (TXx)
1908
n/a
1909
n/a
1910
n/a
1911
n/a
1912
31.1 C (88.0 F)
1913
32.2 C (90.0 F)
1931
36.1 C (97.0 F)
1932
35.0 C (95.0 F)
1933
40.0 C (104.0 F)
1934
39.4 C (102.9 F)
1935
38.3 C (100.9 F)
1936
38.9 C (102.0 F)
1937
40.0 C (104.0 F)
1938
36.1 C (97.0 F)
1939
37.2 C (99.0 F)
1940
36.1 C (97.0 F)
1941
38.9 C (102.0 F)
1942
35.0 C (95.0 F)
1943
32.8 C (91.0 F)
1944
33.9 C (93.0 F)
1947
14.4 C (57.9 F)
1948
27.8 C (82.0 F)
1949
36.1 C (97.0 F)
1950
35.6 C (96.1 F)
1951
35.0 C (95.0 F)
1952
33.3 C (91.9 F)
1953
35.0 C (95.0 F)
1954
34.4 C (93.9 F)
1955
35.6 C (96.1 F)
1956
37.8 C (100.0 F)
1957
35.0 C (95.0 F)
1958
33.9 C (93.0 F)
1959
35.6 C (96.1 F)
1960
36.1 C (97.0 F)
1961
37.8 C (100.0 F)
1962
33.3 C (91.9 F)
1963
32.2 C (90.0 F)
1964
34.4 C (93.9 F)
1965
32.2 C (90.0 F)
1966
33.9 C (93.0 F)
1967
35.0 C (95.0 F)
1968
35.0 C (95.0 F)
1969
34.4 C (93.9 F)
1970
34.4 C (93.9 F)
1971
35.6 C (96.1 F)
1972
36.7 C (98.1 F)
1973
33.3 C (91.9 F)
1974
34.4 C (93.9 F)
1975
34.4 C (93.9 F)
1976
32.8 C (91.0 F)
1977
35.0 C (95.0 F)
1978
33.9 C (93.0 F)
1979
35.6 C (96.1 F)
1980
34.4 C (93.9 F)
1981
34.4 C (93.9 F)
1982
33.9 C (93.0 F)
1983
33.9 C (93.0 F)
1984
33.9 C (93.0 F)
1985
34.4 C (93.9 F)
1986
34.4 C (93.9 F)
1987
33.3 C (91.9 F)
1988
35.6 C (96.1 F)
1989
32.2 C (90.0 F)
1990
36.1 C (97.0 F)
1991
33.3 C (91.9 F)
1992
35.6 C (96.1 F)
1993
31.7 C (89.1 F)
1994
35.6 C (96.1 F)
1995
32.8 C (91.0 F)
1996
35.6 C (96.1 F)
1997
33.9 C (93.0 F)
1998
35.6 C (96.1 F)
1999
33.9 C (93.0 F)
2000
36.1 C (97.0 F)
2001
35.6 C (96.1 F)
2002
40.0 C (104.0 F)
2003
38.3 C (100.9 F)
2004
33.9 C (93.0 F)
2005
36.1 C (97.0 F)
2006
38.3 C (100.9 F)
2007
37.8 C (100.0 F)
2008
35.0 C (95.0 F)
2009
36.1 C (97.0 F)
2010
33.9 C (93.0 F)
2011
32.8 C (91.0 F)
2012
35.0 C (95.0 F)
2013
35.6 C (96.1 F)
2014
35.0 C (95.0 F)
2015
35.0 C (95.0 F)
2016
33.9 C (93.0 F)
2017
35.0 C (95.0 F)
2018
40.0 C (104.0 F)
2019
34.4 C (93.9 F)
2020
38.9 C (102.0 F)
2021
38.3 C (100.9 F)
Coldest night (TNn)
The coldest night of the year at Seneca, 1908 to 2021. The record is -47.8 C (-54.0 F) in 1933, marked on the chart; the median year is -30.0 C (-22.0 F).
Coldest night (TNn) at Seneca by year
Year
Coldest night (TNn)
1908
n/a
1909
n/a
1910
n/a
1911
n/a
1912
-30.0 C (-22.0 F)
1913
-29.4 C (-20.9 F)
1931
-30.0 C (-22.0 F)
1932
-36.7 C (-34.1 F)
1933
-47.8 C (-54.0 F)
1934
-21.7 C (-7.1 F)
1935
-28.3 C (-18.9 F)
1936
-35.6 C (-32.1 F)
1937
-41.1 C (-42.0 F)
1938
-28.3 C (-18.9 F)
1939
-32.2 C (-26.0 F)
1940
-23.3 C (-9.9 F)
1941
-16.1 C (3.0 F)
1942
-33.9 C (-29.0 F)
1943
-41.1 C (-42.0 F)
1944
-28.3 C (-18.9 F)
1947
-11.1 C (12.0 F)
1948
-10.0 C (14.0 F)
1949
-12.8 C (9.0 F)
1950
-15.0 C (5.0 F)
1951
-35.6 C (-32.1 F)
1952
-32.2 C (-26.0 F)
1953
-23.9 C (-11.0 F)
1954
-30.0 C (-22.0 F)
1955
-35.0 C (-31.0 F)
1956
-38.9 C (-38.0 F)
1957
-41.7 C (-43.1 F)
1958
-23.9 C (-11.0 F)
1959
-31.7 C (-25.1 F)
1960
-35.0 C (-31.0 F)
1961
-33.9 C (-29.0 F)
1962
-40.6 C (-41.1 F)
1963
-32.2 C (-26.0 F)
1964
-36.1 C (-33.0 F)
1965
-25.0 C (-13.0 F)
1966
-29.4 C (-20.9 F)
1967
-33.3 C (-27.9 F)
1968
-23.3 C (-9.9 F)
1969
-31.7 C (-25.1 F)
1970
-30.6 C (-23.1 F)
1971
-37.2 C (-35.0 F)
1972
-40.0 C (-40.0 F)
1973
-28.9 C (-20.0 F)
1974
-31.7 C (-25.1 F)
1975
-28.9 C (-20.0 F)
1976
-29.4 C (-20.9 F)
1977
-33.9 C (-29.0 F)
1978
-40.6 C (-41.1 F)
1979
-40.0 C (-40.0 F)
1980
-23.3 C (-9.9 F)
1981
-25.0 C (-13.0 F)
1982
-37.2 C (-35.0 F)
1983
-32.8 C (-27.0 F)
1984
-31.1 C (-24.0 F)
1985
-41.7 C (-43.1 F)
1986
-22.2 C (-8.0 F)
1987
-32.2 C (-26.0 F)
1988
-29.4 C (-20.9 F)
1989
-44.4 C (-47.9 F)
1990
-37.8 C (-36.0 F)
1991
-25.6 C (-14.1 F)
1992
-35.6 C (-32.1 F)
1993
-30.0 C (-22.0 F)
1994
-26.7 C (-16.1 F)
1995
-24.4 C (-11.9 F)
1996
-37.2 C (-35.0 F)
1997
-23.3 C (-9.9 F)
1998
-28.9 C (-20.0 F)
1999
-29.4 C (-20.9 F)
2000
-24.4 C (-11.9 F)
2001
-26.7 C (-16.1 F)
2002
-30.0 C (-22.0 F)
2003
-27.8 C (-18.0 F)
2004
-27.2 C (-17.0 F)
2005
-27.2 C (-17.0 F)
2006
-27.8 C (-18.0 F)
2007
-25.6 C (-14.1 F)
2008
-33.9 C (-29.0 F)
2009
-27.8 C (-18.0 F)
2010
-32.8 C (-27.0 F)
2011
-34.4 C (-29.9 F)
2012
-24.4 C (-11.9 F)
2013
-33.3 C (-27.9 F)
2014
-28.9 C (-20.0 F)
2015
-22.8 C (-9.0 F)
2016
-11.1 C (12.0 F)
2017
-24.4 C (-11.9 F)
2018
-23.9 C (-11.0 F)
2019
-30.6 C (-23.1 F)
2020
-26.1 C (-15.0 F)
2021
-25.0 C (-13.0 F)
Wettest day (Rx1day)
The wettest day of the year at Seneca, 1908 to 2021. The record is 64.8 mm (2.6 in) in 1965, marked on the chart; the median year is 21.1 mm (0.8 in).
Wettest day (Rx1day) at Seneca by year
Year
Wettest day (Rx1day)
1908
2.5 mm (0.10 in)
1909
17.8 mm (0.7 in)
1910
25.1 mm (1.0 in)
1911
23.6 mm (0.9 in)
1912
29.0 mm (1.1 in)
1913
29.5 mm (1.2 in)
1931
19.8 mm (0.8 in)
1932
10.4 mm (0.4 in)
1933
22.9 mm (0.9 in)
1934
19.8 mm (0.8 in)
1935
16.3 mm (0.6 in)
1936
21.8 mm (0.9 in)
1937
42.4 mm (1.7 in)
1938
23.6 mm (0.9 in)
1939
14.5 mm (0.6 in)
1940
20.8 mm (0.8 in)
1941
21.6 mm (0.9 in)
1942
36.6 mm (1.4 in)
1943
18.3 mm (0.7 in)
1944
20.1 mm (0.8 in)
1947
8.4 mm (0.33 in)
1948
13.5 mm (0.5 in)
1949
10.7 mm (0.4 in)
1950
12.7 mm (0.5 in)
1951
15.2 mm (0.6 in)
1952
26.7 mm (1.1 in)
1953
20.3 mm (0.8 in)
1954
27.9 mm (1.1 in)
1955
20.1 mm (0.8 in)
1956
20.8 mm (0.8 in)
1957
15.2 mm (0.6 in)
1958
25.7 mm (1.0 in)
1959
23.6 mm (0.9 in)
1960
19.1 mm (0.8 in)
1961
15.5 mm (0.6 in)
1962
23.1 mm (0.9 in)
1963
19.3 mm (0.8 in)
1964
25.4 mm (1.0 in)
1965
64.8 mm (2.6 in)
1966
27.9 mm (1.1 in)
1967
31.5 mm (1.2 in)
1968
25.4 mm (1.0 in)
1969
13.7 mm (0.5 in)
1970
22.4 mm (0.9 in)
1971
20.8 mm (0.8 in)
1972
19.6 mm (0.8 in)
1973
21.1 mm (0.8 in)
1974
12.4 mm (0.5 in)
1975
30.7 mm (1.2 in)
1976
13.0 mm (0.5 in)
1977
26.7 mm (1.1 in)
1978
18.0 mm (0.7 in)
1979
16.0 mm (0.6 in)
1980
16.3 mm (0.6 in)
1981
22.9 mm (0.9 in)
1982
26.7 mm (1.1 in)
1983
24.4 mm (1.0 in)
1984
51.3 mm (2.0 in)
1985
20.8 mm (0.8 in)
1986
16.8 mm (0.7 in)
1987
17.8 mm (0.7 in)
1988
15.5 mm (0.6 in)
1989
32.8 mm (1.3 in)
1990
22.9 mm (0.9 in)
1991
21.1 mm (0.8 in)
1992
25.4 mm (1.0 in)
1993
24.1 mm (0.9 in)
1994
23.4 mm (0.9 in)
1995
23.4 mm (0.9 in)
1996
29.5 mm (1.2 in)
1997
30.0 mm (1.2 in)
1998
24.4 mm (1.0 in)
1999
14.5 mm (0.6 in)
2000
19.1 mm (0.8 in)
2001
13.5 mm (0.5 in)
2002
13.2 mm (0.5 in)
2003
17.8 mm (0.7 in)
2004
15.7 mm (0.6 in)
2005
15.7 mm (0.6 in)
2006
16.3 mm (0.6 in)
2007
10.2 mm (0.4 in)
2008
25.4 mm (1.0 in)
2009
24.4 mm (1.0 in)
2010
31.8 mm (1.3 in)
2011
29.7 mm (1.2 in)
2012
22.9 mm (0.9 in)
2013
28.2 mm (1.1 in)
2014
23.4 mm (0.9 in)
2015
35.6 mm (1.4 in)
2016
25.4 mm (1.0 in)
2017
10.9 mm (0.4 in)
2018
16.5 mm (0.6 in)
2019
24.1 mm (0.9 in)
2020
25.4 mm (1.0 in)
2021
0.0 mm (0.00 in)
Wettest five days (Rx5day)
The wettest five days of the year at Seneca, 1908 to 2021. The record is 74.8 mm (2.9 in) in 1936, marked on the chart; the median year is 34.1 mm (1.3 in).
Wettest five days (Rx5day) at Seneca by year
Year
Wettest five days (Rx5day)
1908
2.5 mm (0.10 in)
1909
44.7 mm (1.8 in)
1910
44.6 mm (1.8 in)
1911
35.3 mm (1.4 in)
1912
48.5 mm (1.9 in)
1913
63.2 mm (2.5 in)
1931
35.8 mm (1.4 in)
1932
22.9 mm (0.9 in)
1933
33.3 mm (1.3 in)
1934
21.8 mm (0.9 in)
1935
22.7 mm (0.9 in)
1936
74.8 mm (2.9 in)
1937
44.9 mm (1.8 in)
1938
40.4 mm (1.6 in)
1939
27.7 mm (1.1 in)
1940
34.8 mm (1.4 in)
1941
23.4 mm (0.9 in)
1942
45.0 mm (1.8 in)
1943
38.6 mm (1.5 in)
1944
10.4 mm (0.4 in)
1947
17.6 mm (0.7 in)
1948
36.8 mm (1.4 in)
1949
10.7 mm (0.4 in)
1950
20.8 mm (0.8 in)
1951
33.0 mm (1.3 in)
1952
35.9 mm (1.4 in)
1953
32.9 mm (1.3 in)
1954
30.4 mm (1.2 in)
1955
37.2 mm (1.5 in)
1956
35.8 mm (1.4 in)
1957
37.6 mm (1.5 in)
1958
29.5 mm (1.2 in)
1959
54.1 mm (2.1 in)
1960
22.9 mm (0.9 in)
1961
32.5 mm (1.3 in)
1962
73.2 mm (2.9 in)
1963
36.6 mm (1.4 in)
1964
55.3 mm (2.2 in)
1965
64.8 mm (2.6 in)
1966
41.6 mm (1.6 in)
1967
34.8 mm (1.4 in)
1968
32.7 mm (1.3 in)
1969
30.7 mm (1.2 in)
1970
51.4 mm (2.0 in)
1971
31.0 mm (1.2 in)
1972
25.7 mm (1.0 in)
1973
30.2 mm (1.2 in)
1974
23.2 mm (0.9 in)
1975
40.4 mm (1.6 in)
1976
27.8 mm (1.1 in)
1977
40.4 mm (1.6 in)
1978
32.6 mm (1.3 in)
1979
41.7 mm (1.6 in)
1980
25.6 mm (1.0 in)
1981
38.1 mm (1.5 in)
1982
59.0 mm (2.3 in)
1983
44.2 mm (1.7 in)
1984
62.0 mm (2.4 in)
1985
28.8 mm (1.1 in)
1986
42.0 mm (1.7 in)
1987
29.1 mm (1.1 in)
1988
19.4 mm (0.8 in)
1989
52.1 mm (2.1 in)
1990
33.1 mm (1.3 in)
1991
54.9 mm (2.2 in)
1992
28.3 mm (1.1 in)
1993
27.9 mm (1.1 in)
1994
26.0 mm (1.0 in)
1995
41.9 mm (1.6 in)
1996
49.6 mm (2.0 in)
1997
65.8 mm (2.6 in)
1998
46.7 mm (1.8 in)
1999
19.9 mm (0.8 in)
2000
25.4 mm (1.0 in)
2001
25.9 mm (1.0 in)
2002
22.3 mm (0.9 in)
2003
37.1 mm (1.5 in)
2004
32.2 mm (1.3 in)
2005
29.7 mm (1.2 in)
2006
39.4 mm (1.6 in)
2007
15.1 mm (0.6 in)
2008
42.0 mm (1.7 in)
2009
48.6 mm (1.9 in)
2010
32.3 mm (1.3 in)
2011
50.8 mm (2.0 in)
2012
42.6 mm (1.7 in)
2013
34.1 mm (1.3 in)
2014
26.7 mm (1.1 in)
2015
63.5 mm (2.5 in)
2016
30.5 mm (1.2 in)
2017
28.7 mm (1.1 in)
2018
16.5 mm (0.6 in)
2019
61.0 mm (2.4 in)
2020
29.6 mm (1.2 in)
2021
0.0 mm (0.00 in)
Longest dry spell (CDD)
The longest dry spell of the year at Seneca, 1908 to 2021. The record is 92 days in 1935, marked on the chart; the median year is 41 days.
Longest dry spell (CDD) at Seneca by year
Year
Longest dry spell (CDD)
1908
10 days
1909
35 days
1910
27 days
1911
56 days
1912
27 days
1913
22 days
1931
91 days
1932
84 days
1933
35 days
1934
87 days
1935
92 days
1936
77 days
1937
43 days
1938
57 days
1939
64 days
1940
47 days
1941
25 days
1942
49 days
1943
50 days
1944
72 days
1947
2 days
1948
14 days
1949
61 days
1950
45 days
1951
47 days
1952
63 days
1953
34 days
1954
30 days
1955
70 days
1956
44 days
1957
36 days
1958
56 days
1959
47 days
1960
29 days
1961
40 days
1962
67 days
1963
22 days
1964
33 days
1965
51 days
1966
63 days
1967
41 days
1968
41 days
1969
46 days
1970
54 days
1971
54 days
1972
26 days
1973
64 days
1974
82 days
1975
30 days
1976
46 days
1977
38 days
1978
72 days
1979
55 days
1980
60 days
1981
73 days
1982
23 days
1983
37 days
1984
28 days
1985
53 days
1986
36 days
1987
86 days
1988
47 days
1989
30 days
1990
25 days
1991
36 days
1992
27 days
1993
46 days
1994
36 days
1995
50 days
1996
32 days
1997
30 days
1998
25 days
1999
56 days
2000
28 days
2001
32 days
2002
32 days
2003
33 days
2004
45 days
2005
62 days
2006
33 days
2007
34 days
2008
43 days
2009
34 days
2010
31 days
2011
60 days
2012
74 days
2013
41 days
2014
36 days
2015
49 days
2016
52 days
2017
32 days
2018
17 days
2019
30 days
2020
19 days
2021
5 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
60 years with a frost
Across 60 years with a frost, the median last spring frost at Seneca falls on 27 June and the median first autumn frost on 4 July, which leaves a median of 8 days between them.
In 1978 to 2019 the median growing season was 12 days. That is 6 days more than in 1933 to 1977.
Fitted over all years, the growing season changes by -0.5 days per decade at this station.
Frost dates and growing season at Seneca
Measure
Median, all years
Earliest period (1933 to 1977)
Recent period (1978 to 2019)
Recent against earliest
Fitted trend
Last spring frost
27 June
28 June
25 June
3 days earlier
-0.1 days per decade
First autumn frost
4 July
3 July
4 July
1 day later
-0.7 days per decade
Growing days
8 days
6 days
12 days
6 days more
-0.5 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
69 years, 1909 to 2013
A day with at least 21.3 mm (0.8 in) of rain is expected about once in 2 years. A day with at least 42.9 mm (1.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Seneca: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
21.3 mm (0.8 in)
5 years
27.4 mm (1.1 in)
10 years
31.3 mm (1.2 in)
25 years
36.1 mm (1.4 in)
50 years
39.5 mm (1.6 in)
100 years
42.9 mm (1.7 in)
Longer than the 69 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, 69 years of values from 1909 to 2013.
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: 51.3 mm (2.0 in) in 1984; 42.4 mm (1.7 in) in 1937; 36.6 mm (1.4 in) in 1942.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Seneca standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Seneca 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.