Record envelope, standing records and threshold days for Seneca Sf 1N (USC00468051), West Virginia, United States, with 63 years of record.
Key Facts for Seneca Sf 1N
Seneca Sf 1N (USC00468051) is a weather station in West Virginia, United States at 38.33 latitude and -79.92 longitude, 747 m (2,450 ft) above sea level.
The station reports from 1938 to 2000, 63 years of record.
1,464 records set at Seneca Sf 1N still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Seneca Sf 1N tied a daily record snow depth of 2.5 cm (1.0 in) on 29 March 2000.
About the Station
Location: West Virginia, United States, 38.33 latitude, -79.92 longitude.
Elevation: 747 m (2,450 ft).
Period of record: 1938 to 2000, 63 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 Sf 1N. 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 Sf 1N, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
21.7 C (71.1 F)
-31.1 C (-24.0 F)
n/a
n/a
Feb
22.2 C (72.0 F)
-29.4 C (-20.9 F)
n/a
n/a
Mar
27.8 C (82.0 F)
-25.0 C (-13.0 F)
n/a
n/a
Apr
34.4 C (93.9 F)
-17.2 C (1.0 F)
n/a
n/a
May
33.9 C (93.0 F)
-9.4 C (15.1 F)
n/a
n/a
Jun
35.0 C (95.0 F)
-4.4 C (24.1 F)
n/a
n/a
Jul
37.2 C (99.0 F)
-1.7 C (28.9 F)
n/a
n/a
Aug
35.6 C (96.1 F)
-1.1 C (30.0 F)
n/a
n/a
Sep
33.9 C (93.0 F)
-7.8 C (18.0 F)
n/a
n/a
Oct
31.1 C (88.0 F)
-13.9 C (7.0 F)
n/a
n/a
Nov
25.6 C (78.1 F)
-18.9 C (-2.0 F)
n/a
n/a
Dec
23.9 C (75.0 F)
-31.7 C (-25.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Seneca Sf 1N still stand. 1940 holds the most, with 68.
Standing records at Seneca Sf 1N by the year they were set
Year set
Standing records
1938
4
1939
51
1940
68
1941
49
1942
46
1943
55
1944
32
1945
33
1946
11
1947
9
1967
17
1968
52
1969
28
1970
30
1971
38
1972
37
1973
27
1974
48
1975
27
1976
50
1977
41
1978
26
1979
32
1980
27
1981
28
1982
34
1983
37
1984
47
1985
37
1986
34
1987
38
1988
47
1989
43
1990
31
1991
40
1992
21
1993
17
1994
20
1995
25
1996
38
1997
32
1998
25
1999
26
2000
6
Wettest Day of Each Month
Nov: 157.5 mm (6.2 in)
The wettest day on record for each calendar month at Seneca Sf 1N. The most was 157.5 mm (6.2 in) on 4 November 1985.
Record daily precipitation for each month at Seneca Sf 1N
Month
Record daily precipitation (mm)
Date
Jan
65.8 mm (2.6 in)
19 January 1996
Feb
50.5 mm (2.0 in)
17 February 1945
Mar
47.5 mm (1.9 in)
25 March 1978
Apr
73.9 mm (2.9 in)
4 April 1977
May
65.0 mm (2.6 in)
8 May 1994
Jun
73.4 mm (2.9 in)
23 June 1995
Jul
97.3 mm (3.8 in)
29 July 1939
Aug
91.4 mm (3.6 in)
21 August 1989
Sep
88.4 mm (3.5 in)
28 September 1967
Oct
123.4 mm (4.9 in)
5 October 1972
Nov
157.5 mm (6.2 in)
4 November 1985
Dec
63.2 mm (2.5 in)
26 December 1973
Period of Record Coverage
1938 to 2000
Complete yearUnder 90 percent of days
44 years of record at Seneca Sf 1N, 1938 to 2000. 10 years have data for under 90 percent of days and are left out of rankings: 1938, 1939, 1945, 1946, 1947, 1967, 1992, 1993 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 29 complete years at Seneca Sf 1N, 1940 to 1999. Blue stripes are years cooler than the station's own mean of 8.9 C (48.0 F); red stripes are warmer. The coolest year was 1981, at 8.0 C (46.3 F), and the warmest was 1990, at 10.5 C (51.0 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Seneca Sf 1N as warming stripes, 1940 to 1999
Year
Annual mean temperature
Difference from the station mean
1940
8.7 C
-0.21 C
1941
9.8 C
+0.91 C
1942
9.2 C
+0.28 C
1944
8.7 C
-0.21 C
1968
8.2 C
-0.71 C
1969
8.1 C
-0.84 C
1970
8.8 C
-0.09 C
1971
8.9 C
+0.01 C
1972
8.5 C
-0.44 C
1973
9.5 C
+0.59 C
1974
9.0 C
+0.08 C
1975
9.4 C
+0.53 C
1976
8.0 C
-0.89 C
1977
8.7 C
-0.17 C
1979
8.3 C
-0.57 C
1980
8.4 C
-0.56 C
1981
8.0 C
-0.95 C
1982
9.0 C
+0.08 C
1983
8.2 C
-0.76 C
1984
9.0 C
+0.05 C
1985
9.5 C
+0.56 C
1986
9.5 C
+0.55 C
1987
9.7 C
+0.74 C
1988
8.5 C
-0.41 C
1989
8.9 C
+0.01 C
1990
10.5 C
+1.63 C
1997
8.2 C
-0.73 C
1998
10.0 C
+1.10 C
1999
9.5 C
+0.56 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
1938 to 2000
Yearly extremes at Seneca Sf 1N: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
37.2 C (99.0 F)
1988
32.2 C (90.0 F)
44
Coldest night (TNn)
-31.7 C (-25.1 F)
1989
-24.4 C (-11.9 F)
43
Wettest day (Rx1day)
157.5 mm (6.2 in)
1985
52.8 mm (2.1 in)
44
Wettest five days (Rx5day)
203.5 mm (8.0 in)
1985
89.5 mm (3.5 in)
44
Longest dry spell (CDD)
31 days
1988
15 days
44
Hottest day (TXx)
The hottest day of the year at Seneca Sf 1N, 1938 to 2000. The record is 37.2 C (99.0 F) in 1988, marked on the chart; the median year is 32.2 C (90.0 F).
Hottest day (TXx) at Seneca Sf 1N by year
Year
Hottest day (TXx)
1938
31.1 C (88.0 F)
1939
35.0 C (95.0 F)
1940
32.8 C (91.0 F)
1941
34.4 C (93.9 F)
1942
33.3 C (91.9 F)
1943
31.1 C (88.0 F)
1944
32.2 C (90.0 F)
1945
26.7 C (80.1 F)
1946
27.8 C (82.0 F)
1947
26.7 C (80.1 F)
1967
29.4 C (84.9 F)
1968
33.3 C (91.9 F)
1969
32.8 C (91.0 F)
1970
31.7 C (89.1 F)
1971
32.2 C (90.0 F)
1972
32.2 C (90.0 F)
1973
33.9 C (93.0 F)
1974
31.7 C (89.1 F)
1975
34.4 C (93.9 F)
1976
31.1 C (88.0 F)
1977
34.4 C (93.9 F)
1978
32.8 C (91.0 F)
1979
31.7 C (89.1 F)
1980
34.4 C (93.9 F)
1981
32.2 C (90.0 F)
1982
31.1 C (88.0 F)
1983
33.9 C (93.0 F)
1984
32.2 C (90.0 F)
1985
32.2 C (90.0 F)
1986
32.8 C (91.0 F)
1987
35.6 C (96.1 F)
1988
37.2 C (99.0 F)
1989
31.7 C (89.1 F)
1990
32.8 C (91.0 F)
1991
33.3 C (91.9 F)
1992
29.4 C (84.9 F)
1993
32.8 C (91.0 F)
1994
30.6 C (87.1 F)
1995
35.6 C (96.1 F)
1996
32.8 C (91.0 F)
1997
30.6 C (87.1 F)
1998
30.6 C (87.1 F)
1999
33.9 C (93.0 F)
2000
24.4 C (75.9 F)
Coldest night (TNn)
The coldest night of the year at Seneca Sf 1N, 1938 to 2000. The record is -31.7 C (-25.1 F) in 1989, marked on the chart; the median year is -24.4 C (-11.9 F).
Coldest night (TNn) at Seneca Sf 1N by year
Year
Coldest night (TNn)
1938
n/a
1939
-20.0 C (-4.0 F)
1940
-29.4 C (-20.9 F)
1941
-23.9 C (-11.0 F)
1942
-29.4 C (-20.9 F)
1943
-24.4 C (-11.9 F)
1944
-26.1 C (-15.0 F)
1945
-23.9 C (-11.0 F)
1946
-25.0 C (-13.0 F)
1947
-6.7 C (19.9 F)
1967
-25.0 C (-13.0 F)
1968
-24.4 C (-11.9 F)
1969
-23.3 C (-9.9 F)
1970
-25.0 C (-13.0 F)
1971
-21.1 C (-6.0 F)
1972
-29.4 C (-20.9 F)
1973
-23.3 C (-9.9 F)
1974
-22.2 C (-8.0 F)
1975
-23.3 C (-9.9 F)
1976
-23.9 C (-11.0 F)
1977
-27.8 C (-18.0 F)
1978
-25.6 C (-14.1 F)
1979
-24.4 C (-11.9 F)
1980
-25.0 C (-13.0 F)
1981
-26.7 C (-16.1 F)
1982
-31.1 C (-24.0 F)
1983
-27.8 C (-18.0 F)
1984
-30.6 C (-23.1 F)
1985
-30.6 C (-23.1 F)
1986
-23.3 C (-9.9 F)
1987
-29.4 C (-20.9 F)
1988
-25.6 C (-14.1 F)
1989
-31.7 C (-25.1 F)
1990
-24.4 C (-11.9 F)
1991
-18.9 C (-2.0 F)
1992
-18.3 C (-0.9 F)
1993
-23.3 C (-9.9 F)
1994
-31.1 C (-24.0 F)
1995
-23.3 C (-9.9 F)
1996
-27.2 C (-17.0 F)
1997
-23.9 C (-11.0 F)
1998
-17.2 C (1.0 F)
1999
-21.1 C (-6.0 F)
2000
-21.7 C (-7.1 F)
Wettest day (Rx1day)
The wettest day of the year at Seneca Sf 1N, 1938 to 2000. The record is 157.5 mm (6.2 in) in 1985, marked on the chart; the median year is 52.8 mm (2.1 in).
Wettest day (Rx1day) at Seneca Sf 1N by year
Year
Wettest day (Rx1day)
1938
21.3 mm (0.8 in)
1939
97.3 mm (3.8 in)
1940
50.8 mm (2.0 in)
1941
40.6 mm (1.6 in)
1942
50.8 mm (2.0 in)
1943
64.5 mm (2.5 in)
1944
54.1 mm (2.1 in)
1945
50.5 mm (2.0 in)
1946
35.1 mm (1.4 in)
1947
34.8 mm (1.4 in)
1967
88.4 mm (3.5 in)
1968
47.5 mm (1.9 in)
1969
39.4 mm (1.6 in)
1970
65.8 mm (2.6 in)
1971
56.9 mm (2.2 in)
1972
123.4 mm (4.9 in)
1973
63.2 mm (2.5 in)
1974
80.3 mm (3.2 in)
1975
68.3 mm (2.7 in)
1976
41.9 mm (1.6 in)
1977
73.9 mm (2.9 in)
1978
47.5 mm (1.9 in)
1979
70.6 mm (2.8 in)
1980
52.1 mm (2.1 in)
1981
43.4 mm (1.7 in)
1982
52.8 mm (2.1 in)
1983
61.0 mm (2.4 in)
1984
60.7 mm (2.4 in)
1985
157.5 mm (6.2 in)
1986
43.4 mm (1.7 in)
1987
50.0 mm (2.0 in)
1988
47.8 mm (1.9 in)
1989
91.4 mm (3.6 in)
1990
58.9 mm (2.3 in)
1991
54.4 mm (2.1 in)
1992
45.7 mm (1.8 in)
1993
42.9 mm (1.7 in)
1994
65.0 mm (2.6 in)
1995
73.4 mm (2.9 in)
1996
65.8 mm (2.6 in)
1997
46.2 mm (1.8 in)
1998
52.8 mm (2.1 in)
1999
34.3 mm (1.4 in)
2000
40.4 mm (1.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Seneca Sf 1N, 1938 to 2000. The record is 203.5 mm (8.0 in) in 1985, marked on the chart; the median year is 89.5 mm (3.5 in).
Wettest five days (Rx5day) at Seneca Sf 1N by year
Year
Wettest five days (Rx5day)
1938
21.9 mm (0.9 in)
1939
101.9 mm (4.0 in)
1940
75.8 mm (3.0 in)
1941
42.5 mm (1.7 in)
1942
106.9 mm (4.2 in)
1943
98.0 mm (3.9 in)
1944
89.1 mm (3.5 in)
1945
61.5 mm (2.4 in)
1946
50.1 mm (2.0 in)
1947
52.6 mm (2.1 in)
1967
97.4 mm (3.8 in)
1968
76.7 mm (3.0 in)
1969
79.4 mm (3.1 in)
1970
81.1 mm (3.2 in)
1971
88.5 mm (3.5 in)
1972
138.4 mm (5.4 in)
1973
79.4 mm (3.1 in)
1974
93.8 mm (3.7 in)
1975
79.7 mm (3.1 in)
1976
110.7 mm (4.4 in)
1977
92.2 mm (3.6 in)
1978
91.7 mm (3.6 in)
1979
91.0 mm (3.6 in)
1980
76.7 mm (3.0 in)
1981
86.1 mm (3.4 in)
1982
88.1 mm (3.5 in)
1983
128.5 mm (5.1 in)
1984
155.2 mm (6.1 in)
1985
203.5 mm (8.0 in)
1986
107.0 mm (4.2 in)
1987
96.6 mm (3.8 in)
1988
75.0 mm (3.0 in)
1989
119.4 mm (4.7 in)
1990
94.1 mm (3.7 in)
1991
98.4 mm (3.9 in)
1992
58.2 mm (2.3 in)
1993
67.3 mm (2.6 in)
1994
95.0 mm (3.7 in)
1995
91.2 mm (3.6 in)
1996
114.3 mm (4.5 in)
1997
89.9 mm (3.5 in)
1998
62.9 mm (2.5 in)
1999
67.4 mm (2.7 in)
2000
56.4 mm (2.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Seneca Sf 1N, 1938 to 2000. The record is 31 days in 1988, marked on the chart; the median year is 15 days.
Longest dry spell (CDD) at Seneca Sf 1N by year
Year
Longest dry spell (CDD)
1938
12 days
1939
19 days
1940
13 days
1941
22 days
1942
16 days
1943
27 days
1944
15 days
1945
18 days
1946
11 days
1947
9 days
1967
12 days
1968
17 days
1969
13 days
1970
12 days
1971
18 days
1972
9 days
1973
18 days
1974
17 days
1975
10 days
1976
19 days
1977
16 days
1978
15 days
1979
15 days
1980
14 days
1981
16 days
1982
21 days
1983
12 days
1984
14 days
1985
14 days
1986
20 days
1987
13 days
1988
31 days
1989
11 days
1990
13 days
1991
10 days
1992
12 days
1993
17 days
1994
23 days
1995
15 days
1996
9 days
1997
15 days
1998
20 days
1999
14 days
2000
10 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
29 years with a frost
Across 29 years with a frost, the median last spring frost at Seneca Sf 1N falls on 26 May and the median first autumn frost on 22 September, which leaves a median of 118 days between them.
Fitted over all years, the growing season changes by +2.1 days per decade at this station.
Frost dates and growing season at Seneca Sf 1N
Measure
Median, all years
Earliest period
Recent period (1940 to 1999)
Recent against earliest
Fitted trend
Last spring frost
26 May
n/a
26 May
n/a
-2.4 days per decade
First autumn frost
22 September
n/a
22 September
n/a
-0.3 days per decade
Growing days
118 days
n/a
118 days
n/a
+2.1 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
37 years, 1940 to 1999
A day with at least 54.0 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 156.5 mm (6.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Seneca Sf 1N: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
54.0 mm (2.1 in)
5 years
70.5 mm (2.8 in)
10 years
84.8 mm (3.3 in)
25 years
108.0 mm (4.3 in)
50 years
129.9 mm (5.1 in)
Longer than the 37 years of record
100 years
156.5 mm (6.2 in)
Longer than the 37 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, 37 years of values from 1940 to 1999.
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: 157.5 mm (6.2 in) in 1985; 123.4 mm (4.9 in) in 1972; 91.4 mm (3.6 in) in 1989.
Download the Data
Data for Seneca Sf 1N standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Seneca Sf 1N 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.