Record envelope, standing records and threshold days for Clermont 8 SW (USC00361534), Pennsylvania, United States, with 39 years of record.
Key Facts for Clermont 8 SW
Clermont 8 SW (USC00361534) is a weather station in Pennsylvania, United States at 41.73 latitude and -78.53 longitude, 494 m (1,620 ft) above sea level.
The station reports from 1961 to 1999, 39 years of record.
1,464 records set at Clermont 8 SW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Clermont 8 SW set a daily record precipitation of 24.9 mm (1.0 in) on 25 May 1999.
About the Station
Location: Pennsylvania, United States, 41.73 latitude, -78.53 longitude.
Elevation: 494 m (1,620 ft).
Period of record: 1961 to 1999, 39 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 Clermont 8 SW. 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 Clermont 8 SW, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
17.8 C (64.0 F)
-36.7 C (-34.1 F)
n/a
n/a
Feb
18.9 C (66.0 F)
-38.3 C (-36.9 F)
n/a
n/a
Mar
26.7 C (80.1 F)
-29.4 C (-20.9 F)
n/a
n/a
Apr
31.1 C (88.0 F)
-17.2 C (1.0 F)
n/a
n/a
May
33.3 C (91.9 F)
-12.2 C (10.0 F)
n/a
n/a
Jun
32.2 C (90.0 F)
-6.1 C (21.0 F)
n/a
n/a
Jul
36.7 C (98.1 F)
-2.2 C (28.0 F)
n/a
n/a
Aug
34.4 C (93.9 F)
-5.0 C (23.0 F)
n/a
n/a
Sep
31.7 C (89.1 F)
-7.2 C (19.0 F)
n/a
n/a
Oct
27.2 C (81.0 F)
-12.8 C (9.0 F)
n/a
n/a
Nov
23.9 C (75.0 F)
-19.4 C (-2.9 F)
n/a
n/a
Dec
21.1 C (70.0 F)
-33.9 C (-29.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Clermont 8 SW still stand. 1963 holds the most, with 64.
Standing records at Clermont 8 SW by the year they were set
Year set
Standing records
1961
42
1962
56
1963
64
1964
54
1965
47
1966
60
1967
31
1968
48
1969
28
1970
44
1971
53
1972
38
1973
40
1974
38
1975
40
1976
60
1977
50
1978
42
1979
54
1980
37
1981
35
1982
40
1983
30
1984
42
1985
22
1986
33
1987
30
1988
60
1989
48
1990
48
1991
50
1992
2
1995
1
1996
32
1997
33
1998
30
1999
2
Wettest Day of Each Month
Jun: 111.8 mm (4.4 in)
The wettest day on record for each calendar month at Clermont 8 SW. The most was 111.8 mm (4.4 in) on 18 June 1984.
Record daily precipitation for each month at Clermont 8 SW
Month
Record daily precipitation (mm)
Date
Jan
38.9 mm (1.5 in)
25 January 1979
Feb
34.3 mm (1.4 in)
17 February 1976
Mar
47.2 mm (1.9 in)
3 March 1976
Apr
55.9 mm (2.2 in)
29 April 1981
May
48.0 mm (1.9 in)
12 May 1981
Jun
111.8 mm (4.4 in)
18 June 1984
Jul
55.4 mm (2.2 in)
5 July 1989
Aug
78.7 mm (3.1 in)
7 August 1985
Sep
85.6 mm (3.4 in)
29 September 1967
Oct
64.5 mm (2.5 in)
19 October 1996
Nov
42.7 mm (1.7 in)
30 November 1987
Dec
46.5 mm (1.8 in)
3 December 1991
Period of Record Coverage
1961 to 1999
Complete yearUnder 90 percent of days
37 years of record at Clermont 8 SW, 1961 to 1999. 5 years have data for under 90 percent of days and are left out of rankings: 1965, 1967, 1992, 1995, 1999.
Cooler than the station meanWarmer than the station mean
One stripe for each of 27 complete years at Clermont 8 SW, 1961 to 1997. Blue stripes are years cooler than the station's own mean of 7.2 C (45.0 F); red stripes are warmer. The coolest year was 1963, at 5.8 C (42.5 F), and the warmest was 1990, at 9.0 C (48.2 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Clermont 8 SW as warming stripes, 1961 to 1997
Year
Annual mean temperature
Difference from the station mean
1961
7.9 C
+0.69 C
1962
6.5 C
-0.76 C
1963
5.8 C
-1.38 C
1964
6.6 C
-0.63 C
1966
6.6 C
-0.67 C
1968
7.0 C
-0.26 C
1970
7.4 C
+0.16 C
1971
7.4 C
+0.16 C
1972
6.7 C
-0.56 C
1973
8.3 C
+1.04 C
1974
7.2 C
-0.01 C
1975
7.6 C
+0.37 C
1976
6.5 C
-0.74 C
1977
7.1 C
-0.17 C
1978
6.2 C
-1.01 C
1979
7.0 C
-0.26 C
1980
6.7 C
-0.52 C
1982
7.3 C
+0.08 C
1983
7.7 C
+0.51 C
1984
7.3 C
+0.10 C
1987
8.0 C
+0.74 C
1988
7.4 C
+0.20 C
1989
7.1 C
-0.13 C
1990
9.0 C
+1.77 C
1991
8.7 C
+1.52 C
1996
7.2 C
-0.04 C
1997
7.1 C
-0.09 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
1961 to 1999
Yearly extremes at Clermont 8 SW: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
36.7 C (98.1 F)
1988
31.7 C (89.1 F)
37
Coldest night (TNn)
-38.3 C (-36.9 F)
1963
-30.3 C (-22.5 F)
36
Wettest day (Rx1day)
111.8 mm (4.4 in)
1984
50.8 mm (2.0 in)
37
Wettest five days (Rx5day)
219.4 mm (8.6 in)
1972
74.4 mm (2.9 in)
37
Longest dry spell (CDD)
22 days
1963
12 days
37
Hottest day (TXx)
The hottest day of the year at Clermont 8 SW, 1961 to 1999. The record is 36.7 C (98.1 F) in 1988, marked on the chart; the median year is 31.7 C (89.1 F).
Hottest day (TXx) at Clermont 8 SW by year
Year
Hottest day (TXx)
1961
32.2 C (90.0 F)
1962
33.3 C (91.9 F)
1963
34.4 C (93.9 F)
1964
33.9 C (93.0 F)
1965
32.2 C (90.0 F)
1966
35.0 C (95.0 F)
1967
31.7 C (89.1 F)
1968
31.1 C (88.0 F)
1969
31.7 C (89.1 F)
1970
30.6 C (87.1 F)
1971
32.2 C (90.0 F)
1972
31.7 C (89.1 F)
1973
32.2 C (90.0 F)
1974
31.7 C (89.1 F)
1975
32.8 C (91.0 F)
1976
31.1 C (88.0 F)
1977
32.2 C (90.0 F)
1978
31.7 C (89.1 F)
1979
31.1 C (88.0 F)
1980
32.8 C (91.0 F)
1981
31.7 C (89.1 F)
1982
30.6 C (87.1 F)
1983
32.2 C (90.0 F)
1984
31.1 C (88.0 F)
1985
29.4 C (84.9 F)
1986
32.2 C (90.0 F)
1987
32.8 C (91.0 F)
1988
36.7 C (98.1 F)
1989
31.7 C (89.1 F)
1990
33.9 C (93.0 F)
1991
32.8 C (91.0 F)
1992
8.9 C (48.0 F)
1995
7.8 C (46.0 F)
1996
31.1 C (88.0 F)
1997
30.6 C (87.1 F)
1998
31.1 C (88.0 F)
1999
-1.1 C (30.0 F)
Coldest night (TNn)
The coldest night of the year at Clermont 8 SW, 1961 to 1999. The record is -38.3 C (-36.9 F) in 1963, marked on the chart; the median year is -30.3 C (-22.5 F).
Coldest night (TNn) at Clermont 8 SW by year
Year
Coldest night (TNn)
1961
-36.7 C (-34.1 F)
1962
-30.0 C (-22.0 F)
1963
-38.3 C (-36.9 F)
1964
-31.1 C (-24.0 F)
1965
-34.4 C (-29.9 F)
1966
-31.7 C (-25.1 F)
1967
-30.6 C (-23.1 F)
1968
-35.6 C (-32.1 F)
1969
-28.9 C (-20.0 F)
1970
-30.6 C (-23.1 F)
1971
-30.6 C (-23.1 F)
1972
-28.9 C (-20.0 F)
1973
-33.9 C (-29.0 F)
1974
-25.6 C (-14.1 F)
1975
-27.2 C (-17.0 F)
1976
-34.4 C (-29.9 F)
1977
-30.6 C (-23.1 F)
1978
-32.8 C (-27.0 F)
1979
-36.7 C (-34.1 F)
1980
-33.9 C (-29.0 F)
1981
-33.9 C (-29.0 F)
1982
-29.4 C (-20.9 F)
1983
-25.0 C (-13.0 F)
1984
-36.7 C (-34.1 F)
1985
-29.4 C (-20.9 F)
1986
-22.2 C (-8.0 F)
1987
-30.0 C (-22.0 F)
1988
-28.3 C (-18.9 F)
1989
-28.9 C (-20.0 F)
1990
-27.8 C (-18.0 F)
1991
-25.6 C (-14.1 F)
1992
-28.3 C (-18.9 F)
1995
-20.0 C (-4.0 F)
1996
-30.6 C (-23.1 F)
1997
-30.0 C (-22.0 F)
1998
-18.3 C (-0.9 F)
1999
n/a
Wettest day (Rx1day)
The wettest day of the year at Clermont 8 SW, 1961 to 1999. The record is 111.8 mm (4.4 in) in 1984, marked on the chart; the median year is 50.8 mm (2.0 in).
Wettest day (Rx1day) at Clermont 8 SW by year
Year
Wettest day (Rx1day)
1961
33.0 mm (1.3 in)
1962
64.3 mm (2.5 in)
1963
46.2 mm (1.8 in)
1964
43.9 mm (1.7 in)
1965
47.2 mm (1.9 in)
1966
30.0 mm (1.2 in)
1967
85.6 mm (3.4 in)
1968
45.2 mm (1.8 in)
1969
51.8 mm (2.0 in)
1970
46.2 mm (1.8 in)
1971
51.6 mm (2.0 in)
1972
96.5 mm (3.8 in)
1973
60.5 mm (2.4 in)
1974
48.3 mm (1.9 in)
1975
58.7 mm (2.3 in)
1976
47.2 mm (1.9 in)
1977
72.6 mm (2.9 in)
1978
46.2 mm (1.8 in)
1979
59.7 mm (2.4 in)
1980
50.8 mm (2.0 in)
1981
55.9 mm (2.2 in)
1982
45.5 mm (1.8 in)
1983
43.2 mm (1.7 in)
1984
111.8 mm (4.4 in)
1985
78.7 mm (3.1 in)
1986
53.3 mm (2.1 in)
1987
66.5 mm (2.6 in)
1988
42.7 mm (1.7 in)
1989
64.3 mm (2.5 in)
1990
42.7 mm (1.7 in)
1991
48.3 mm (1.9 in)
1992
24.1 mm (0.9 in)
1995
20.8 mm (0.8 in)
1996
64.5 mm (2.5 in)
1997
38.1 mm (1.5 in)
1998
61.5 mm (2.4 in)
1999
52.8 mm (2.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Clermont 8 SW, 1961 to 1999. The record is 219.4 mm (8.6 in) in 1972, marked on the chart; the median year is 74.4 mm (2.9 in).
Wettest five days (Rx5day) at Clermont 8 SW by year
Year
Wettest five days (Rx5day)
1961
60.0 mm (2.4 in)
1962
93.8 mm (3.7 in)
1963
73.1 mm (2.9 in)
1964
70.9 mm (2.8 in)
1965
63.7 mm (2.5 in)
1966
59.7 mm (2.4 in)
1967
102.6 mm (4.0 in)
1968
68.6 mm (2.7 in)
1969
60.2 mm (2.4 in)
1970
74.4 mm (2.9 in)
1971
70.4 mm (2.8 in)
1972
219.4 mm (8.6 in)
1973
113.2 mm (4.5 in)
1974
66.1 mm (2.6 in)
1975
99.4 mm (3.9 in)
1976
72.0 mm (2.8 in)
1977
88.9 mm (3.5 in)
1978
68.1 mm (2.7 in)
1979
74.7 mm (2.9 in)
1980
73.1 mm (2.9 in)
1981
75.7 mm (3.0 in)
1982
69.6 mm (2.7 in)
1983
70.9 mm (2.8 in)
1984
124.2 mm (4.9 in)
1985
108.9 mm (4.3 in)
1986
99.2 mm (3.9 in)
1987
105.1 mm (4.1 in)
1988
80.0 mm (3.1 in)
1989
114.6 mm (4.5 in)
1990
96.0 mm (3.8 in)
1991
60.7 mm (2.4 in)
1992
29.2 mm (1.1 in)
1995
26.4 mm (1.0 in)
1996
108.5 mm (4.3 in)
1997
85.6 mm (3.4 in)
1998
87.7 mm (3.5 in)
1999
68.2 mm (2.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Clermont 8 SW, 1961 to 1999. The record is 22 days in 1963, marked on the chart; the median year is 12 days.
Longest dry spell (CDD) at Clermont 8 SW by year
Year
Longest dry spell (CDD)
1961
17 days
1962
11 days
1963
22 days
1964
14 days
1965
9 days
1966
14 days
1967
15 days
1968
12 days
1969
18 days
1970
14 days
1971
18 days
1972
9 days
1973
15 days
1974
11 days
1975
13 days
1976
13 days
1977
18 days
1978
17 days
1979
10 days
1980
16 days
1981
12 days
1982
11 days
1983
16 days
1984
12 days
1985
13 days
1986
11 days
1987
21 days
1988
8 days
1989
10 days
1990
10 days
1991
10 days
1992
9 days
1995
3 days
1996
11 days
1997
10 days
1998
12 days
1999
13 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
27 years with a frost
Across 27 years with a frost, the median last spring frost at Clermont 8 SW falls on 11 June and the median first autumn frost on 2 September, which leaves a median of 92 days between them.
Fitted over all years, the growing season changes by +16.3 days per decade at this station.
Frost dates and growing season at Clermont 8 SW
Measure
Median, all years
Earliest period
Recent period (1961 to 1997)
Recent against earliest
Fitted trend
Last spring frost
11 June
n/a
11 June
n/a
-3.2 days per decade
First autumn frost
2 September
n/a
2 September
n/a
+13.1 days per decade
Growing days
92 days
n/a
92 days
n/a
+16.3 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
33 years, 1961 to 1998
A day with at least 52.0 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 122.8 mm (4.8 in) of rain is expected about once in 100 years.
Rainfall return levels at Clermont 8 SW: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
52.0 mm (2.0 in)
5 years
66.8 mm (2.6 in)
10 years
78.1 mm (3.1 in)
25 years
94.3 mm (3.7 in)
50 years
107.9 mm (4.2 in)
Longer than the 33 years of record
100 years
122.8 mm (4.8 in)
Longer than the 33 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, 33 years of values from 1961 to 1998.
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: 111.8 mm (4.4 in) in 1984; 96.5 mm (3.8 in) in 1972; 85.6 mm (3.4 in) in 1967.
Download the Data
Data for Clermont 8 SW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Clermont 8 SW 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.