Record envelope, standing records and threshold days for Butler 2 SW (USC00361139), Pennsylvania, United States, with 54 years of record.
Key Facts for Butler 2 SW
Butler 2 SW (USC00361139) is a weather station in Pennsylvania, United States at 40.84 latitude and -79.92 longitude, 305 m (1,000 ft) above sea level.
The station reports from 1967 to 2020, 54 years of record.
1,464 records set at Butler 2 SW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Butler 2 SW set a daily record high maximum temperature of 33.9 C (93.0 F) on 10 July 2020.
About the Station
Location: Pennsylvania, United States, 40.84 latitude, -79.92 longitude.
Elevation: 305 m (1,000 ft).
Period of record: 1967 to 2020, 54 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 Butler 2 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 Butler 2 SW, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
20.6 C (69.1 F)
-28.9 C (-20.0 F)
n/a
n/a
Feb
23.9 C (75.0 F)
-28.3 C (-18.9 F)
n/a
n/a
Mar
28.9 C (84.0 F)
-23.3 C (-9.9 F)
n/a
n/a
Apr
32.2 C (90.0 F)
-12.8 C (9.0 F)
n/a
n/a
May
32.8 C (91.0 F)
-5.6 C (21.9 F)
n/a
n/a
Jun
36.1 C (97.0 F)
-0.6 C (30.9 F)
n/a
n/a
Jul
38.9 C (102.0 F)
1.1 C (34.0 F)
n/a
n/a
Aug
37.8 C (100.0 F)
0.0 C (32.0 F)
n/a
n/a
Sep
34.4 C (93.9 F)
-2.2 C (28.0 F)
n/a
n/a
Oct
31.1 C (88.0 F)
-8.3 C (17.1 F)
n/a
n/a
Nov
26.1 C (79.0 F)
-17.8 C (0.0 F)
n/a
n/a
Dec
23.3 C (73.9 F)
-25.6 C (-14.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Butler 2 SW still stand. 1976 holds the most, with 57.
Standing records at Butler 2 SW by the year they were set
Year set
Standing records
1967
7
1968
41
1969
30
1970
24
1971
42
1972
30
1973
35
1974
28
1975
28
1976
57
1977
45
1978
35
1979
48
1980
20
1981
17
1982
39
1983
26
1984
33
1985
24
1986
34
1987
21
1988
53
1989
44
1990
29
1991
35
1992
12
1993
26
1994
21
1995
18
1996
25
1997
25
1998
24
1999
16
2000
23
2001
24
2002
40
2003
11
2004
21
2005
23
2006
24
2007
22
2008
19
2009
18
2010
15
2011
16
2012
35
2013
21
2014
26
2015
34
2016
25
2017
28
2018
26
2019
11
2020
10
All-Time Record Progression
3 new records
3 all-time records were set at Butler 2 SW between 9 September 2004 and 6 February 2010. Each dot is a new record.
When Butler 2 SW set new all-time records
Date
Kind
Detail
2004-09-09
Record daily precipitation
Record daily precipitation 99.1 mm (3.9 in)
2004-09-18
Record daily precipitation
Record daily precipitation 119.9 mm (4.7 in)
2010-02-06
Record daily snowfall
Record daily snowfall 43.4 cm (17.1 in)
Wettest Day of Each Month
Sep: 119.9 mm (4.7 in)
The wettest day on record for each calendar month at Butler 2 SW. The most was 119.9 mm (4.7 in) on 18 September 2004.
Record daily precipitation for each month at Butler 2 SW
Month
Record daily precipitation (mm)
Date
Jan
62.2 mm (2.4 in)
12 January 2018
Feb
51.8 mm (2.0 in)
24 February 1975
Mar
50.3 mm (2.0 in)
29 March 1985
Apr
53.3 mm (2.1 in)
11 April 2013
May
84.3 mm (3.3 in)
28 May 1985
Jun
61.0 mm (2.4 in)
15 June 2015
Jul
74.7 mm (2.9 in)
9 July 1985
Aug
100.3 mm (3.9 in)
21 August 2007
Sep
119.9 mm (4.7 in)
18 September 2004
Oct
69.3 mm (2.7 in)
4 October 1986
Nov
55.4 mm (2.2 in)
6 November 2017
Dec
80.0 mm (3.1 in)
1 December 2010
Period of Record Coverage
1967 to 2020
Complete yearUnder 90 percent of days
54 years of record at Butler 2 SW, 1967 to 2020. 6 years have data for under 90 percent of days and are left out of rankings: 1967, 2008, 2009, 2012, 2014, 2020.
Cooler than the station meanWarmer than the station mean
One stripe for each of 51 complete years at Butler 2 SW, 1968 to 2019. Blue stripes are years cooler than the station's own mean of 9.4 C (48.9 F); red stripes are warmer. The coolest year was 1978, at 7.9 C (46.1 F), and the warmest was 2012, at 11.0 C (51.9 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Butler 2 SW as warming stripes, 1968 to 2019
Year
Annual mean temperature
Difference from the station mean
1968
8.7 C
-0.72 C
1969
8.8 C
-0.64 C
1970
9.4 C
+0.00 C
1971
9.1 C
-0.31 C
1972
8.7 C
-0.72 C
1973
10.0 C
+0.57 C
1974
9.0 C
-0.45 C
1975
9.5 C
+0.13 C
1976
8.2 C
-1.18 C
1977
8.7 C
-0.72 C
1978
7.9 C
-1.55 C
1979
9.0 C
-0.40 C
1980
8.8 C
-0.58 C
1981
9.3 C
-0.14 C
1982
9.6 C
+0.15 C
1983
9.7 C
+0.31 C
1984
9.2 C
-0.24 C
1985
9.3 C
-0.10 C
1986
10.0 C
+0.55 C
1987
10.2 C
+0.75 C
1988
9.3 C
-0.10 C
1989
8.8 C
-0.63 C
1991
10.6 C
+1.21 C
1992
8.7 C
-0.75 C
1993
9.1 C
-0.32 C
1994
9.0 C
-0.39 C
1995
9.2 C
-0.25 C
1996
8.9 C
-0.51 C
1997
8.8 C
-0.61 C
1998
11.0 C
+1.61 C
1999
10.1 C
+0.65 C
2000
9.4 C
-0.04 C
2001
10.1 C
+0.69 C
2002
10.2 C
+0.77 C
2003
9.0 C
-0.45 C
2004
9.5 C
+0.08 C
2005
9.9 C
+0.47 C
2006
10.4 C
+0.96 C
2007
9.7 C
+0.31 C
2008
9.0 C
-0.37 C
2009
8.9 C
-0.48 C
2010
9.7 C
+0.33 C
2011
10.6 C
+1.16 C
2012
11.0 C
+1.63 C
2013
9.3 C
-0.09 C
2014
8.3 C
-1.10 C
2015
9.4 C
-0.03 C
2016
10.1 C
+0.69 C
2017
10.0 C
+0.58 C
2018
9.4 C
-0.01 C
2019
9.6 C
+0.15 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1968 to 2019. In Fahrenheit: 0.3 F (0.1 to 0.5) per decade. The slope is a straight line fitted to 51 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Butler 2 SW
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.3) per decade
0.3 F (0.1 to 0.5) per decade
1968 to 2019
51
Rise
Mean daily maximum
-0.02 C (-0.15 to 0.12) per decade
-0.03 F (-0.27 to 0.21) per decade
1968 to 2019
51
Not clearly different from zero
Mean daily minimum
0.4 C (0.2 to 0.5) per decade
0.7 F (0.4 to 0.9) per decade
1968 to 2019
51
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
1967 to 2020
Yearly extremes at Butler 2 SW: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
38.9 C (102.0 F)
1988
33.6 C (92.5 F)
54
Coldest night (TNn)
-28.9 C (-20.0 F)
1977
-21.9 C (-7.5 F)
54
Wettest day (Rx1day)
119.9 mm (4.7 in)
2004
53.3 mm (2.1 in)
54
Wettest five days (Rx5day)
165.1 mm (6.5 in)
2018
79.2 mm (3.1 in)
54
Longest dry spell (CDD)
27 days
1983
14 days
54
Hottest day (TXx)
The hottest day of the year at Butler 2 SW, 1967 to 2020. The record is 38.9 C (102.0 F) in 1988, marked on the chart; the median year is 33.6 C (92.5 F).
Hottest day (TXx) at Butler 2 SW by year
Year
Hottest day (TXx)
1967
28.3 C (82.9 F)
1968
35.0 C (95.0 F)
1969
34.4 C (93.9 F)
1970
32.2 C (90.0 F)
1971
34.4 C (93.9 F)
1972
33.3 C (91.9 F)
1973
34.4 C (93.9 F)
1974
32.8 C (91.0 F)
1975
33.9 C (93.0 F)
1976
32.2 C (90.0 F)
1977
34.4 C (93.9 F)
1978
33.9 C (93.0 F)
1979
33.9 C (93.0 F)
1980
35.0 C (95.0 F)
1981
33.3 C (91.9 F)
1982
33.3 C (91.9 F)
1983
33.9 C (93.0 F)
1984
32.8 C (91.0 F)
1985
34.4 C (93.9 F)
1986
33.9 C (93.0 F)
1987
34.4 C (93.9 F)
1988
38.9 C (102.0 F)
1989
33.9 C (93.0 F)
1990
32.8 C (91.0 F)
1991
35.0 C (95.0 F)
1992
30.0 C (86.0 F)
1993
33.3 C (91.9 F)
1994
35.6 C (96.1 F)
1995
34.4 C (93.9 F)
1996
31.7 C (89.1 F)
1997
33.3 C (91.9 F)
1998
32.8 C (91.0 F)
1999
35.6 C (96.1 F)
2000
32.2 C (90.0 F)
2001
35.0 C (95.0 F)
2002
35.0 C (95.0 F)
2003
31.7 C (89.1 F)
2004
30.6 C (87.1 F)
2005
34.4 C (93.9 F)
2006
33.3 C (91.9 F)
2007
33.3 C (91.9 F)
2008
32.2 C (90.0 F)
2009
31.7 C (89.1 F)
2010
33.9 C (93.0 F)
2011
37.2 C (99.0 F)
2012
36.1 C (97.0 F)
2013
32.8 C (91.0 F)
2014
31.1 C (88.0 F)
2015
31.7 C (89.1 F)
2016
33.9 C (93.0 F)
2017
31.7 C (89.1 F)
2018
33.3 C (91.9 F)
2019
32.8 C (91.0 F)
2020
34.4 C (93.9 F)
Coldest night (TNn)
The coldest night of the year at Butler 2 SW, 1967 to 2020. The record is -28.9 C (-20.0 F) in 1977, marked on the chart; the median year is -21.9 C (-7.5 F).
Coldest night (TNn) at Butler 2 SW by year
Year
Coldest night (TNn)
1967
-13.3 C (8.1 F)
1968
-23.3 C (-9.9 F)
1969
-21.1 C (-6.0 F)
1970
-23.9 C (-11.0 F)
1971
-23.9 C (-11.0 F)
1972
-23.9 C (-11.0 F)
1973
-22.2 C (-8.0 F)
1974
-16.1 C (3.0 F)
1975
-25.0 C (-13.0 F)
1976
-24.4 C (-11.9 F)
1977
-28.9 C (-20.0 F)
1978
-25.0 C (-13.0 F)
1979
-27.8 C (-18.0 F)
1980
-22.2 C (-8.0 F)
1981
-25.6 C (-14.1 F)
1982
-26.7 C (-16.1 F)
1983
-23.9 C (-11.0 F)
1984
-28.9 C (-20.0 F)
1985
-27.8 C (-18.0 F)
1986
-21.1 C (-6.0 F)
1987
-21.7 C (-7.1 F)
1988
-21.7 C (-7.1 F)
1989
-25.6 C (-14.1 F)
1990
-20.6 C (-5.1 F)
1991
-17.2 C (1.0 F)
1992
-18.9 C (-2.0 F)
1993
-21.7 C (-7.1 F)
1994
-28.9 C (-20.0 F)
1995
-18.9 C (-2.0 F)
1996
-21.1 C (-6.0 F)
1997
-22.2 C (-8.0 F)
1998
-16.7 C (1.9 F)
1999
-18.3 C (-0.9 F)
2000
-20.0 C (-4.0 F)
2001
-15.6 C (3.9 F)
2002
-15.6 C (3.9 F)
2003
-23.3 C (-9.9 F)
2004
-22.8 C (-9.0 F)
2005
-22.2 C (-8.0 F)
2006
-15.6 C (3.9 F)
2007
-20.0 C (-4.0 F)
2008
-16.7 C (1.9 F)
2009
-26.7 C (-16.1 F)
2010
-21.7 C (-7.1 F)
2011
-22.8 C (-9.0 F)
2012
-16.1 C (3.0 F)
2013
-17.2 C (1.0 F)
2014
-25.0 C (-13.0 F)
2015
-27.8 C (-18.0 F)
2016
-21.1 C (-6.0 F)
2017
-18.9 C (-2.0 F)
2018
-24.4 C (-11.9 F)
2019
-21.1 C (-6.0 F)
2020
-15.0 C (5.0 F)
Wettest day (Rx1day)
The wettest day of the year at Butler 2 SW, 1967 to 2020. The record is 119.9 mm (4.7 in) in 2004, marked on the chart; the median year is 53.3 mm (2.1 in).
Wettest day (Rx1day) at Butler 2 SW by year
Year
Wettest day (Rx1day)
1967
29.0 mm (1.1 in)
1968
43.2 mm (1.7 in)
1969
50.8 mm (2.0 in)
1970
47.0 mm (1.9 in)
1971
36.1 mm (1.4 in)
1972
53.3 mm (2.1 in)
1973
65.8 mm (2.6 in)
1974
66.8 mm (2.6 in)
1975
51.8 mm (2.0 in)
1976
32.8 mm (1.3 in)
1977
71.6 mm (2.8 in)
1978
60.5 mm (2.4 in)
1979
43.7 mm (1.7 in)
1980
59.9 mm (2.4 in)
1981
42.7 mm (1.7 in)
1982
41.1 mm (1.6 in)
1983
32.3 mm (1.3 in)
1984
41.7 mm (1.6 in)
1985
84.3 mm (3.3 in)
1986
69.3 mm (2.7 in)
1987
66.0 mm (2.6 in)
1988
37.3 mm (1.5 in)
1989
74.4 mm (2.9 in)
1990
55.9 mm (2.2 in)
1991
49.0 mm (1.9 in)
1992
85.1 mm (3.4 in)
1993
57.2 mm (2.3 in)
1994
50.5 mm (2.0 in)
1995
53.3 mm (2.1 in)
1996
58.4 mm (2.3 in)
1997
48.3 mm (1.9 in)
1998
48.3 mm (1.9 in)
1999
51.3 mm (2.0 in)
2000
43.2 mm (1.7 in)
2001
55.1 mm (2.2 in)
2002
32.3 mm (1.3 in)
2003
55.6 mm (2.2 in)
2004
119.9 mm (4.7 in)
2005
55.9 mm (2.2 in)
2006
41.4 mm (1.6 in)
2007
100.3 mm (3.9 in)
2008
25.9 mm (1.0 in)
2009
44.5 mm (1.8 in)
2010
80.0 mm (3.1 in)
2011
40.1 mm (1.6 in)
2012
58.4 mm (2.3 in)
2013
64.0 mm (2.5 in)
2014
47.5 mm (1.9 in)
2015
61.0 mm (2.4 in)
2016
74.2 mm (2.9 in)
2017
55.4 mm (2.2 in)
2018
96.5 mm (3.8 in)
2019
67.6 mm (2.7 in)
2020
32.8 mm (1.3 in)
Wettest five days (Rx5day)
The wettest five days of the year at Butler 2 SW, 1967 to 2020. The record is 165.1 mm (6.5 in) in 2018, marked on the chart; the median year is 79.2 mm (3.1 in).
Wettest five days (Rx5day) at Butler 2 SW by year
Year
Wettest five days (Rx5day)
1967
36.1 mm (1.4 in)
1968
57.2 mm (2.3 in)
1969
70.4 mm (2.8 in)
1970
68.5 mm (2.7 in)
1971
60.7 mm (2.4 in)
1972
114.3 mm (4.5 in)
1973
82.9 mm (3.3 in)
1974
149.6 mm (5.9 in)
1975
77.7 mm (3.1 in)
1976
60.7 mm (2.4 in)
1977
112.0 mm (4.4 in)
1978
79.5 mm (3.1 in)
1979
73.1 mm (2.9 in)
1980
75.4 mm (3.0 in)
1981
85.8 mm (3.4 in)
1982
67.1 mm (2.6 in)
1983
78.8 mm (3.1 in)
1984
78.5 mm (3.1 in)
1985
130.5 mm (5.1 in)
1986
100.8 mm (4.0 in)
1987
92.4 mm (3.6 in)
1988
67.5 mm (2.7 in)
1989
97.8 mm (3.9 in)
1990
134.8 mm (5.3 in)
1991
63.8 mm (2.5 in)
1992
128.8 mm (5.1 in)
1993
74.5 mm (2.9 in)
1994
73.9 mm (2.9 in)
1995
64.7 mm (2.5 in)
1996
76.2 mm (3.0 in)
1997
105.2 mm (4.1 in)
1998
70.4 mm (2.8 in)
1999
70.1 mm (2.8 in)
2000
54.9 mm (2.2 in)
2001
68.1 mm (2.7 in)
2002
59.0 mm (2.3 in)
2003
86.3 mm (3.4 in)
2004
122.7 mm (4.8 in)
2005
96.1 mm (3.8 in)
2006
89.2 mm (3.5 in)
2007
133.3 mm (5.2 in)
2008
53.4 mm (2.1 in)
2009
80.1 mm (3.2 in)
2010
90.7 mm (3.6 in)
2011
67.1 mm (2.6 in)
2012
99.0 mm (3.9 in)
2013
93.3 mm (3.7 in)
2014
77.5 mm (3.1 in)
2015
114.9 mm (4.5 in)
2016
112.8 mm (4.4 in)
2017
87.2 mm (3.4 in)
2018
165.1 mm (6.5 in)
2019
102.1 mm (4.0 in)
2020
70.4 mm (2.8 in)
Longest dry spell (CDD)
The longest dry spell of the year at Butler 2 SW, 1967 to 2020. The record is 27 days in 1983, marked on the chart; the median year is 14 days.
Longest dry spell (CDD) at Butler 2 SW by year
Year
Longest dry spell (CDD)
1967
6 days
1968
25 days
1969
15 days
1970
8 days
1971
14 days
1972
9 days
1973
15 days
1974
10 days
1975
13 days
1976
13 days
1977
18 days
1978
11 days
1979
12 days
1980
16 days
1981
17 days
1982
17 days
1983
27 days
1984
15 days
1985
14 days
1986
16 days
1987
11 days
1988
14 days
1989
9 days
1990
12 days
1991
15 days
1992
16 days
1993
13 days
1994
14 days
1995
19 days
1996
10 days
1997
12 days
1998
18 days
1999
21 days
2000
13 days
2001
16 days
2002
12 days
2003
12 days
2004
14 days
2005
16 days
2006
16 days
2007
15 days
2008
13 days
2009
17 days
2010
16 days
2011
13 days
2012
9 days
2013
11 days
2014
14 days
2015
11 days
2016
10 days
2017
21 days
2018
11 days
2019
12 days
2020
11 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
51 years with a frost
Across 51 years with a frost, the median last spring frost at Butler 2 SW falls on 11 May and the median first autumn frost on 11 October, which leaves a median of 151 days between them.
Fitted over all years, the growing season changes by +5.9 days per decade at this station.
Frost dates and growing season at Butler 2 SW
Measure
Median, all years
Earliest period
Recent period (1989 to 2019)
Recent against earliest
Fitted trend
Last spring frost
11 May
n/a
7 May
n/a
-2.6 days per decade
First autumn frost
11 October
n/a
14 October
n/a
+3.2 days per decade
Growing days
151 days
n/a
161 days
n/a
+5.9 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
50 years, 1968 to 2019
A day with at least 53.4 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 118.5 mm (4.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Butler 2 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
53.4 mm (2.1 in)
5 years
69.8 mm (2.7 in)
10 years
81.1 mm (3.2 in)
25 years
95.8 mm (3.8 in)
50 years
107.1 mm (4.2 in)
100 years
118.5 mm (4.7 in)
Longer than the 50 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, 50 years of values from 1968 to 2019.
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: 119.9 mm (4.7 in) in 2004; 100.3 mm (3.9 in) in 2007; 96.5 mm (3.8 in) in 2018.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2005 to 2019 against 1961 to 1990
Over 2005 to 2019, Butler 2 SW had a mean temperature of 9.7 C (49.4 F) and 1,094.4 mm (43.1 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Belvidere (United States, 407 km away), Matamoras (United States, 440 km away) and Senecaville Lake (United States, 164 km away).
Climate twins of Butler 2 SW: stations whose 1961 to 1990 climate is closest to its 2005 to 2019 climate
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
Download the Data
Data for Butler 2 SW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Butler 2 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.