Record envelope, standing records and threshold days for Balch Pwr House (USC00040449), California, United States, with 74 years of record.
Key Facts for Balch Pwr House
Balch Pwr House (USC00040449) is a weather station in California, United States at 36.91 latitude and -119.09 longitude, 529 m (1,735 ft) above sea level.
The station reports from 1950 to 2023, 74 years of record.
1,464 records set at Balch Pwr House still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Balch Pwr House set a daily record high maximum temperature of 18.9 C (66.0 F) on 27 December 2022.
About the Station
Location: California, United States, 36.91 latitude, -119.09 longitude.
Elevation: 529 m (1,735 ft).
Period of record: 1950 to 2023, 74 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 Balch Pwr House. 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 Balch Pwr House, 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)
-6.7 C (19.9 F)
n/a
n/a
Feb
26.1 C (79.0 F)
-5.6 C (21.9 F)
n/a
n/a
Mar
31.1 C (88.0 F)
-2.8 C (27.0 F)
n/a
n/a
Apr
33.3 C (91.9 F)
-5.0 C (23.0 F)
n/a
n/a
May
39.4 C (102.9 F)
-5.6 C (21.9 F)
n/a
n/a
Jun
41.1 C (106.0 F)
1.7 C (35.1 F)
n/a
n/a
Jul
44.4 C (111.9 F)
7.8 C (46.0 F)
n/a
n/a
Aug
43.9 C (111.0 F)
10.0 C (50.0 F)
n/a
n/a
Sep
42.8 C (109.0 F)
3.9 C (39.0 F)
n/a
n/a
Oct
38.9 C (102.0 F)
0.0 C (32.0 F)
n/a
n/a
Nov
28.9 C (84.0 F)
-1.7 C (28.9 F)
n/a
n/a
Dec
20.0 C (68.0 F)
-7.8 C (18.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Balch Pwr House still stand. 1987 holds the most, with 45.
Standing records at Balch Pwr House by the year they were set
Year set
Standing records
1962
13
1963
22
1964
39
1965
21
1966
40
1967
34
1968
15
1969
10
1970
30
1971
42
1972
40
1973
25
1974
9
1975
41
1976
44
1977
30
1978
22
1979
15
1980
17
1981
20
1982
21
1983
30
1984
17
1985
27
1986
41
1987
45
1988
23
1989
29
1990
28
1991
32
1992
13
1993
7
1994
13
1995
20
1996
29
1997
17
1998
37
1999
25
2000
15
2001
24
2002
18
2003
38
2004
32
2005
10
2006
23
2007
28
2008
12
2009
24
2010
15
2011
31
2012
13
2013
15
2014
16
2015
25
2016
9
2017
26
2018
15
2019
20
2020
29
2021
19
2022
24
All-Time Record Progression
10 new records
10 all-time records were set at Balch Pwr House between 13 November 1983 and 29 August 2017. Each dot is a new record.
When Balch Pwr House set new all-time records
Date
Kind
Detail
1983-11-13
Record snow depth
Record snow depth 10.2 cm (4.0 in)
1983-11-19
Record snow depth
Record snow depth 15.2 cm (6.0 in)
1983-11-20
Record snow depth
Record snow depth 20.3 cm (8.0 in)
1983-11-24
Record snow depth
Record snow depth 27.9 cm (11.0 in)
1996-08-14
Record high maximum temperature
Record high maximum temperature 43.3 C (109.9 F)
2001-07-04
Record high minimum temperature
Record high minimum temperature 28.3 C (82.9 F)
2007-01-13
Record low maximum temperature
Record low maximum temperature -0.6 C (30.9 F)
2007-07-05
Record high maximum temperature
Record high maximum temperature 43.9 C (111.0 F)
2007-07-06
Record high maximum temperature
Record high maximum temperature 44.4 C (111.9 F)
2017-08-29
Record high minimum temperature
Record high minimum temperature 30.6 C (87.1 F)
Wettest Day of Each Month
Jan: 176.5 mm (6.9 in)
The wettest day on record for each calendar month at Balch Pwr House. The most was 176.5 mm (6.9 in) on 19 January 1969.
Record daily precipitation for each month at Balch Pwr House
Month
Record daily precipitation (mm)
Date
Jan
176.5 mm (6.9 in)
19 January 1969
Feb
109.5 mm (4.3 in)
13 February 1986
Mar
118.6 mm (4.7 in)
10 March 1995
Apr
106.9 mm (4.2 in)
11 April 1982
May
61.0 mm (2.4 in)
16 May 1996
Jun
51.3 mm (2.0 in)
7 June 1998
Jul
63.8 mm (2.5 in)
12 July 1992
Aug
25.4 mm (1.0 in)
5 August 2022
Sep
85.6 mm (3.4 in)
11 September 1976
Oct
121.9 mm (4.8 in)
14 October 2009
Nov
145.8 mm (5.7 in)
19 November 1950
Dec
140.0 mm (5.5 in)
23 December 1955
Period of Record Coverage
1962 to 2022
Complete yearUnder 90 percent of days
61 years of record at Balch Pwr House, 1962 to 2022. 27 years have data for under 90 percent of days and are left out of rankings: 1962, 1979, 1984, 1985, 1989, 1991, 1993, 1994 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 45 complete years at Balch Pwr House, 1963 to 2020. Blue stripes are years cooler than the station's own mean of 16.6 C (61.9 F); red stripes are warmer. The coolest year was 1998, at 14.6 C (58.2 F), and the warmest was 2014, at 18.2 C (64.7 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Balch Pwr House as warming stripes, 1963 to 2020
Year
Annual mean temperature
Difference from the station mean
1963
16.1 C
-0.48 C
1964
16.3 C
-0.27 C
1965
16.1 C
-0.47 C
1966
17.4 C
+0.76 C
1967
16.1 C
-0.51 C
1968
17.1 C
+0.49 C
1969
15.9 C
-0.71 C
1970
17.3 C
+0.68 C
1972
16.7 C
+0.06 C
1973
16.1 C
-0.53 C
1974
16.4 C
-0.20 C
1975
15.4 C
-1.25 C
1976
16.4 C
-0.21 C
1977
16.4 C
-0.19 C
1978
15.6 C
-0.97 C
1980
16.2 C
-0.44 C
1981
17.2 C
+0.60 C
1982
15.2 C
-1.42 C
1983
15.2 C
-1.43 C
1984
16.6 C
-0.02 C
1985
16.3 C
-0.31 C
1986
16.4 C
-0.23 C
1987
16.9 C
+0.26 C
1988
17.2 C
+0.61 C
1989
16.7 C
+0.10 C
1990
17.0 C
+0.43 C
1991
17.2 C
+0.60 C
1992
17.5 C
+0.93 C
1994
16.4 C
-0.23 C
1996
17.3 C
+0.66 C
1998
14.6 C
-2.04 C
1999
16.5 C
-0.08 C
2001
17.3 C
+0.72 C
2002
17.1 C
+0.52 C
2003
17.5 C
+0.86 C
2005
16.7 C
+0.08 C
2006
16.5 C
-0.13 C
2011
14.8 C
-1.80 C
2012
16.8 C
+0.17 C
2013
16.9 C
+0.34 C
2014
18.2 C
+1.57 C
2016
17.5 C
+0.89 C
2017
16.7 C
+0.10 C
2018
17.9 C
+1.26 C
2020
17.8 C
+1.22 C
The annual mean temperature here has risen by 0.16 C (0.03 to 0.30) per decade over 1963 to 2020. In Fahrenheit: 0.29 F (0.05 to 0.54) per decade. The slope is a straight line fitted to 45 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Balch Pwr House
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.16 C (0.03 to 0.30) per decade
0.29 F (0.05 to 0.54) per decade
1963 to 2020
45
Rise
Mean daily maximum
0.17 C (0.01 to 0.33) per decade
0.30 F (0.02 to 0.59) per decade
1963 to 2020
45
Rise
Mean daily minimum
0.16 C (0.02 to 0.29) per decade
0.28 F (0.04 to 0.53) per decade
1963 to 2020
45
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
1950 to 2023
Yearly extremes at Balch Pwr House: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
44.4 C (111.9 F)
2007
40.0 C (104.0 F)
61
Coldest night (TNn)
-7.8 C (18.0 F)
1972
-2.8 C (27.0 F)
61
Wettest day (Rx1day)
176.5 mm (6.9 in)
1969
63.5 mm (2.5 in)
74
Wettest five days (Rx5day)
369.8 mm (14.6 in)
1966
122.2 mm (4.8 in)
74
Longest dry spell (CDD)
176 days
1952
86 days
74
Hottest day (TXx)
The hottest day of the year at Balch Pwr House, 1950 to 2023. The record is 44.4 C (111.9 F) in 2007, marked on the chart; the median year is 40.0 C (104.0 F).
Hottest day (TXx) at Balch Pwr House by year
Year
Hottest day (TXx)
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
37.8 C (100.0 F)
1963
38.9 C (102.0 F)
1964
40.6 C (105.1 F)
1965
36.7 C (98.1 F)
1966
40.0 C (104.0 F)
1967
40.0 C (104.0 F)
1968
38.3 C (100.9 F)
1969
38.9 C (102.0 F)
1970
40.0 C (104.0 F)
1971
39.4 C (102.9 F)
1972
41.1 C (106.0 F)
1973
38.3 C (100.9 F)
1974
37.8 C (100.0 F)
1975
42.8 C (109.0 F)
1976
40.6 C (105.1 F)
1977
39.4 C (102.9 F)
1978
40.6 C (105.1 F)
1979
39.4 C (102.9 F)
1980
39.4 C (102.9 F)
1981
40.6 C (105.1 F)
1982
36.7 C (98.1 F)
1983
38.3 C (100.9 F)
1984
39.4 C (102.9 F)
1985
38.9 C (102.0 F)
1986
37.8 C (100.0 F)
1987
40.6 C (105.1 F)
1988
40.0 C (104.0 F)
1989
38.9 C (102.0 F)
1990
40.6 C (105.1 F)
1991
40.0 C (104.0 F)
1992
41.1 C (106.0 F)
1993
40.6 C (105.1 F)
1994
40.6 C (105.1 F)
1995
40.0 C (104.0 F)
1996
43.3 C (109.9 F)
1997
40.6 C (105.1 F)
1998
41.7 C (107.1 F)
1999
40.0 C (104.0 F)
2000
38.3 C (100.9 F)
2001
41.7 C (107.1 F)
2002
41.7 C (107.1 F)
2003
41.1 C (106.0 F)
2004
41.1 C (106.0 F)
2005
40.6 C (105.1 F)
2006
43.3 C (109.9 F)
2007
44.4 C (111.9 F)
2008
40.6 C (105.1 F)
2009
42.2 C (108.0 F)
2010
42.2 C (108.0 F)
2011
36.1 C (97.0 F)
2012
40.0 C (104.0 F)
2013
39.4 C (102.9 F)
2014
39.4 C (102.9 F)
2015
38.9 C (102.0 F)
2016
38.9 C (102.0 F)
2017
40.0 C (104.0 F)
2018
37.8 C (100.0 F)
2019
37.8 C (100.0 F)
2020
43.9 C (111.0 F)
2021
40.6 C (105.1 F)
2022
42.2 C (108.0 F)
2023
n/a
Coldest night (TNn)
The coldest night of the year at Balch Pwr House, 1950 to 2023. The record is -7.8 C (18.0 F) in 1972, marked on the chart; the median year is -2.8 C (27.0 F).
Coldest night (TNn) at Balch Pwr House by year
Year
Coldest night (TNn)
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
-2.2 C (28.0 F)
1963
-3.9 C (25.0 F)
1964
-1.7 C (28.9 F)
1965
-3.3 C (26.1 F)
1966
-2.2 C (28.0 F)
1967
-6.7 C (19.9 F)
1968
-4.4 C (24.1 F)
1969
-3.9 C (25.0 F)
1970
-1.7 C (28.9 F)
1971
-3.3 C (26.1 F)
1972
-7.8 C (18.0 F)
1973
-3.3 C (26.1 F)
1974
-3.3 C (26.1 F)
1975
-2.2 C (28.0 F)
1976
-2.8 C (27.0 F)
1977
-3.3 C (26.1 F)
1978
-4.4 C (24.1 F)
1979
-3.9 C (25.0 F)
1980
0.0 C (32.0 F)
1981
-1.7 C (28.9 F)
1982
-2.8 C (27.0 F)
1983
-0.6 C (30.9 F)
1984
-2.2 C (28.0 F)
1985
-2.8 C (27.0 F)
1986
-5.6 C (21.9 F)
1987
-4.4 C (24.1 F)
1988
-3.3 C (26.1 F)
1989
-5.6 C (21.9 F)
1990
-4.4 C (24.1 F)
1991
-1.1 C (30.0 F)
1992
-2.2 C (28.0 F)
1993
-2.8 C (27.0 F)
1994
-1.1 C (30.0 F)
1995
-2.2 C (28.0 F)
1996
-2.2 C (28.0 F)
1997
-2.8 C (27.0 F)
1998
-5.6 C (21.9 F)
1999
-2.8 C (27.0 F)
2000
-3.3 C (26.1 F)
2001
-5.0 C (23.0 F)
2002
-5.0 C (23.0 F)
2003
-2.2 C (28.0 F)
2004
-2.2 C (28.0 F)
2005
-0.6 C (30.9 F)
2006
-2.2 C (28.0 F)
2007
-6.7 C (19.9 F)
2008
-2.2 C (28.0 F)
2009
-3.3 C (26.1 F)
2010
-2.2 C (28.0 F)
2011
-2.8 C (27.0 F)
2012
-2.2 C (28.0 F)
2013
-3.9 C (25.0 F)
2014
-2.8 C (27.0 F)
2015
-2.8 C (27.0 F)
2016
-2.8 C (27.0 F)
2017
-2.2 C (28.0 F)
2018
-2.2 C (28.0 F)
2019
-2.2 C (28.0 F)
2020
-0.6 C (30.9 F)
2021
0.0 C (32.0 F)
2022
-1.1 C (30.0 F)
2023
n/a
Wettest day (Rx1day)
The wettest day of the year at Balch Pwr House, 1950 to 2023. The record is 176.5 mm (6.9 in) in 1969, marked on the chart; the median year is 63.5 mm (2.5 in).
Wettest day (Rx1day) at Balch Pwr House by year
Year
Wettest day (Rx1day)
1950
145.8 mm (5.7 in)
1951
52.1 mm (2.1 in)
1952
69.1 mm (2.7 in)
1953
67.1 mm (2.6 in)
1954
80.3 mm (3.2 in)
1955
140.0 mm (5.5 in)
1956
83.3 mm (3.3 in)
1957
39.6 mm (1.6 in)
1958
64.8 mm (2.6 in)
1959
58.4 mm (2.3 in)
1960
47.0 mm (1.9 in)
1961
52.3 mm (2.1 in)
1962
77.0 mm (3.0 in)
1963
148.3 mm (5.8 in)
1964
55.9 mm (2.2 in)
1965
63.5 mm (2.5 in)
1966
138.4 mm (5.4 in)
1967
55.9 mm (2.2 in)
1968
35.6 mm (1.4 in)
1969
176.5 mm (6.9 in)
1970
78.7 mm (3.1 in)
1971
56.6 mm (2.2 in)
1972
48.8 mm (1.9 in)
1973
63.5 mm (2.5 in)
1974
51.1 mm (2.0 in)
1975
42.9 mm (1.7 in)
1976
85.6 mm (3.4 in)
1977
53.6 mm (2.1 in)
1978
104.9 mm (4.1 in)
1979
58.4 mm (2.3 in)
1980
88.6 mm (3.5 in)
1981
62.2 mm (2.4 in)
1982
131.1 mm (5.2 in)
1983
78.7 mm (3.1 in)
1984
44.5 mm (1.8 in)
1985
57.2 mm (2.3 in)
1986
109.5 mm (4.3 in)
1987
79.0 mm (3.1 in)
1988
84.8 mm (3.3 in)
1989
51.1 mm (2.0 in)
1990
46.0 mm (1.8 in)
1991
78.7 mm (3.1 in)
1992
76.2 mm (3.0 in)
1993
61.0 mm (2.4 in)
1994
50.8 mm (2.0 in)
1995
118.6 mm (4.7 in)
1996
95.3 mm (3.8 in)
1997
66.0 mm (2.6 in)
1998
74.2 mm (2.9 in)
1999
43.2 mm (1.7 in)
2000
89.2 mm (3.5 in)
2001
62.2 mm (2.4 in)
2002
128.5 mm (5.1 in)
2003
66.5 mm (2.6 in)
2004
56.9 mm (2.2 in)
2005
67.8 mm (2.7 in)
2006
73.9 mm (2.9 in)
2007
46.7 mm (1.8 in)
2008
49.8 mm (2.0 in)
2009
121.9 mm (4.8 in)
2010
113.5 mm (4.5 in)
2011
55.9 mm (2.2 in)
2012
55.9 mm (2.2 in)
2013
17.8 mm (0.7 in)
2014
54.6 mm (2.1 in)
2015
50.8 mm (2.0 in)
2016
76.5 mm (3.0 in)
2017
104.1 mm (4.1 in)
2018
60.5 mm (2.4 in)
2019
47.0 mm (1.9 in)
2020
82.3 mm (3.2 in)
2021
42.4 mm (1.7 in)
2022
51.3 mm (2.0 in)
2023
0.0 mm (0.00 in)
Wettest five days (Rx5day)
The wettest five days of the year at Balch Pwr House, 1950 to 2023. The record is 369.8 mm (14.6 in) in 1966, marked on the chart; the median year is 122.2 mm (4.8 in).
Wettest five days (Rx5day) at Balch Pwr House by year
Year
Wettest five days (Rx5day)
1950
266.0 mm (10.5 in)
1951
135.7 mm (5.3 in)
1952
135.0 mm (5.3 in)
1953
75.0 mm (3.0 in)
1954
115.9 mm (4.6 in)
1955
345.5 mm (13.6 in)
1956
176.3 mm (6.9 in)
1957
111.7 mm (4.4 in)
1958
146.5 mm (5.8 in)
1959
93.0 mm (3.7 in)
1960
98.8 mm (3.9 in)
1961
82.8 mm (3.3 in)
1962
242.3 mm (9.5 in)
1963
351.0 mm (13.8 in)
1964
150.9 mm (5.9 in)
1965
121.4 mm (4.8 in)
1966
369.8 mm (14.6 in)
1967
135.9 mm (5.4 in)
1968
80.0 mm (3.1 in)
1969
310.8 mm (12.2 in)
1970
162.3 mm (6.4 in)
1971
77.2 mm (3.0 in)
1972
98.4 mm (3.9 in)
1973
153.0 mm (6.0 in)
1974
98.1 mm (3.9 in)
1975
94.2 mm (3.7 in)
1976
87.1 mm (3.4 in)
1977
108.5 mm (4.3 in)
1978
222.5 mm (8.8 in)
1979
103.8 mm (4.1 in)
1980
306.8 mm (12.1 in)
1981
157.0 mm (6.2 in)
1982
183.9 mm (7.2 in)
1983
135.1 mm (5.3 in)
1984
69.3 mm (2.7 in)
1985
92.3 mm (3.6 in)
1986
278.9 mm (11.0 in)
1987
110.2 mm (4.3 in)
1988
97.0 mm (3.8 in)
1989
60.2 mm (2.4 in)
1990
108.1 mm (4.3 in)
1991
154.4 mm (6.1 in)
1992
142.2 mm (5.6 in)
1993
142.2 mm (5.6 in)
1994
93.0 mm (3.7 in)
1995
204.2 mm (8.0 in)
1996
127.5 mm (5.0 in)
1997
185.9 mm (7.3 in)
1998
121.5 mm (4.8 in)
1999
97.3 mm (3.8 in)
2000
130.6 mm (5.1 in)
2001
74.5 mm (2.9 in)
2002
170.4 mm (6.7 in)
2003
72.6 mm (2.9 in)
2004
121.9 mm (4.8 in)
2005
137.7 mm (5.4 in)
2006
190.7 mm (7.5 in)
2007
75.9 mm (3.0 in)
2008
127.2 mm (5.0 in)
2009
158.7 mm (6.2 in)
2010
315.4 mm (12.4 in)
2011
131.4 mm (5.2 in)
2012
96.6 mm (3.8 in)
2013
25.9 mm (1.0 in)
2014
83.6 mm (3.3 in)
2015
81.4 mm (3.2 in)
2016
90.7 mm (3.6 in)
2017
222.1 mm (8.7 in)
2018
109.0 mm (4.3 in)
2019
122.4 mm (4.8 in)
2020
85.3 mm (3.4 in)
2021
134.0 mm (5.3 in)
2022
65.2 mm (2.6 in)
2023
0.0 mm (0.00 in)
Longest dry spell (CDD)
The longest dry spell of the year at Balch Pwr House, 1950 to 2023. The record is 176 days in 1952, marked on the chart; the median year is 86 days.
Longest dry spell (CDD) at Balch Pwr House by year
Year
Longest dry spell (CDD)
1950
136 days
1951
79 days
1952
176 days
1953
133 days
1954
119 days
1955
109 days
1956
135 days
1957
98 days
1958
48 days
1959
115 days
1960
121 days
1961
75 days
1962
102 days
1963
103 days
1964
82 days
1965
80 days
1966
101 days
1967
104 days
1968
72 days
1969
63 days
1970
105 days
1971
100 days
1972
87 days
1973
144 days
1974
83 days
1975
90 days
1976
69 days
1977
67 days
1978
125 days
1979
71 days
1980
143 days
1981
128 days
1982
48 days
1983
51 days
1984
56 days
1985
47 days
1986
136 days
1987
137 days
1988
71 days
1989
61 days
1990
118 days
1991
48 days
1992
97 days
1993
55 days
1994
115 days
1995
131 days
1996
161 days
1997
48 days
1998
50 days
1999
61 days
2000
53 days
2001
114 days
2002
68 days
2003
79 days
2004
114 days
2005
89 days
2006
74 days
2007
142 days
2008
130 days
2009
127 days
2010
141 days
2011
22 days
2012
21 days
2013
86 days
2014
30 days
2015
26 days
2016
18 days
2017
85 days
2018
37 days
2019
35 days
2020
45 days
2021
27 days
2022
38 days
2023
153 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
39 years with a frost
Across 39 years with a frost, the median last spring frost at Balch Pwr House falls on 12 March and the median first autumn frost on 12 December, which leaves a median of 277 days between them.
Fitted over all years, the growing season changes by -1.0 days per decade at this station.
Frost dates and growing season at Balch Pwr House
Measure
Median, all years
Earliest period
Recent period (1974 to 2020)
Recent against earliest
Fitted trend
Last spring frost
12 March
n/a
12 March
n/a
+0.5 days per decade
First autumn frost
12 December
n/a
9 December
n/a
-0.5 days per decade
Growing days
277 days
n/a
276 days
n/a
-1.0 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
62 years, 1950 to 2020
A day with at least 67.1 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 194.8 mm (7.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Balch Pwr House: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
67.1 mm (2.6 in)
5 years
94.1 mm (3.7 in)
10 years
114.6 mm (4.5 in)
25 years
143.8 mm (5.7 in)
50 years
168.1 mm (6.6 in)
100 years
194.8 mm (7.7 in)
Longer than the 62 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, 62 years of values from 1950 to 2020.
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: 176.5 mm (6.9 in) in 1969; 148.3 mm (5.8 in) in 1963; 145.8 mm (5.7 in) in 1950.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of Balch Pwr House, at 1974 and 2011. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1974 ran 0.4 C (0.7 F) lower than in the years before (possible change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 2011 ran 0.5 C (0.8 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Balch Pwr House, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1974
-0.4
-0.7
possible
5
2011
-0.5
-0.8
likely
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for Balch Pwr House standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Balch Pwr House 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.