Record envelope, standing records and threshold days for Bruneau (USC00101195), Idaho, United States, with 76 years of record.
Key Facts for Bruneau
Bruneau (USC00101195) is a weather station in Idaho, United States at 42.88 latitude and -115.80 longitude, 771 m (2,530 ft) above sea level.
The station reports from 1937 to 2012, 76 years of record.
1,464 records set at Bruneau still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Bruneau set a daily record high maximum temperature of 38.3 C (100.9 F) on 1 July 2012.
About the Station
Location: Idaho, United States, 42.88 latitude, -115.80 longitude.
Elevation: 771 m (2,530 ft).
Period of record: 1937 to 2012, 76 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 Bruneau. 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 Bruneau, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
19.4 C (66.9 F)
-26.7 C (-16.1 F)
n/a
n/a
Feb
23.3 C (73.9 F)
-30.0 C (-22.0 F)
n/a
n/a
Mar
28.9 C (84.0 F)
-17.8 C (0.0 F)
n/a
n/a
Apr
34.4 C (93.9 F)
-8.3 C (17.1 F)
n/a
n/a
May
40.0 C (104.0 F)
-4.4 C (24.1 F)
n/a
n/a
Jun
41.7 C (107.1 F)
-1.1 C (30.0 F)
n/a
n/a
Jul
45.0 C (113.0 F)
3.9 C (39.0 F)
n/a
n/a
Aug
42.2 C (108.0 F)
0.6 C (33.1 F)
n/a
n/a
Sep
39.4 C (102.9 F)
-6.1 C (21.0 F)
n/a
n/a
Oct
36.7 C (98.1 F)
-12.2 C (10.0 F)
n/a
n/a
Nov
28.3 C (82.9 F)
-20.0 C (-4.0 F)
n/a
n/a
Dec
23.3 C (73.9 F)
-35.6 C (-32.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Bruneau still stand. 1985 holds the most, with 48.
Standing records at Bruneau by the year they were set
Year set
Standing records
1938
42
1939
30
1940
23
1941
18
1942
34
1943
32
1944
18
1945
17
1962
16
1963
25
1964
33
1965
35
1966
31
1967
19
1968
25
1969
33
1970
34
1971
29
1972
39
1973
18
1974
29
1975
24
1976
20
1977
36
1978
22
1979
29
1980
25
1981
25
1982
22
1983
27
1984
34
1985
48
1986
36
1987
29
1988
18
1989
35
1990
34
1991
25
1992
34
1993
21
1994
14
1995
34
1996
26
1997
10
1998
19
1999
30
2000
19
2001
16
2002
27
2003
25
2004
13
2005
13
2006
20
2007
12
2008
16
2009
17
2010
7
2011
14
2012
8
All-Time Record Progression
6 new records
6 all-time records were set at Bruneau between 20 June 1988 and 12 July 2002. Each dot is a new record.
When Bruneau set new all-time records
Date
Kind
Detail
1988-06-20
Record high minimum temperature
Record high minimum temperature 26.7 C (80.1 F)
1990-12-19
Record daily snowfall
Record daily snowfall 15.2 cm (6.0 in)
1990-12-22
Record low maximum temperature
Record low maximum temperature -23.3 C (-9.9 F)
1990-12-22
Record low minimum temperature
Record low minimum temperature -35.6 C (-32.1 F)
2002-07-12
Record high maximum temperature
Record high maximum temperature 45.0 C (113.0 F)
2002-07-12
Record high minimum temperature
Record high minimum temperature 27.2 C (81.0 F)
Wettest Day of Each Month
Jun: 45.7 mm (1.8 in)
The wettest day on record for each calendar month at Bruneau. The most was 45.7 mm (1.8 in) on 26 June 1971.
Record daily precipitation for each month at Bruneau
Month
Record daily precipitation (mm)
Date
Jan
43.2 mm (1.7 in)
14 January 1991
Feb
19.3 mm (0.8 in)
4 February 1996
Mar
20.3 mm (0.8 in)
27 March 1996
Apr
36.1 mm (1.4 in)
27 April 1940
May
30.5 mm (1.2 in)
11 May 1995
Jun
45.7 mm (1.8 in)
26 June 1971
Jul
12.7 mm (0.5 in)
4 July 1978
Aug
31.8 mm (1.3 in)
17 August 1968
Sep
42.4 mm (1.7 in)
11 September 1980
Oct
24.4 mm (1.0 in)
11 October 1975
Nov
25.4 mm (1.0 in)
14 November 1944
Dec
27.4 mm (1.1 in)
11 December 1983
Period of Record Coverage
1937 to 2012
Complete yearUnder 90 percent of days
60 years of record at Bruneau, 1937 to 2012. 12 years have data for under 90 percent of days and are left out of rankings: 1937, 1938, 1941, 1945, 1962, 1964, 1977, 1993 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 40 complete years at Bruneau, 1939 to 2011. Blue stripes are years cooler than the station's own mean of 11.5 C (52.6 F); red stripes are warmer. The coolest year was 1985, at 9.2 C (48.5 F), and the warmest was 2003, at 12.5 C (54.6 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Bruneau as warming stripes, 1939 to 2011
Year
Annual mean temperature
Difference from the station mean
1939
11.7 C
+0.27 C
1940
11.9 C
+0.44 C
1965
11.0 C
-0.51 C
1966
11.8 C
+0.33 C
1967
11.7 C
+0.27 C
1968
11.3 C
-0.16 C
1969
11.7 C
+0.21 C
1971
11.3 C
-0.18 C
1972
11.0 C
-0.47 C
1973
12.0 C
+0.53 C
1974
11.6 C
+0.08 C
1975
11.0 C
-0.50 C
1976
10.8 C
-0.67 C
1978
11.4 C
-0.05 C
1979
11.4 C
-0.12 C
1980
11.6 C
+0.13 C
1981
12.2 C
+0.74 C
1982
10.6 C
-0.89 C
1983
11.7 C
+0.20 C
1984
10.3 C
-1.18 C
1985
9.2 C
-2.29 C
1986
11.8 C
+0.34 C
1987
12.1 C
+0.63 C
1988
11.9 C
+0.47 C
1989
11.0 C
-0.50 C
1990
11.7 C
+0.22 C
1991
11.4 C
-0.12 C
1992
12.4 C
+0.92 C
1996
11.4 C
-0.12 C
1997
11.6 C
+0.12 C
1999
11.2 C
-0.27 C
2000
11.3 C
-0.13 C
2001
11.6 C
+0.15 C
2002
10.9 C
-0.56 C
2003
12.5 C
+1.06 C
2004
11.5 C
+0.04 C
2005
10.9 C
-0.55 C
2006
11.7 C
+0.20 C
2009
12.5 C
+0.98 C
2011
12.2 C
+0.77 C
The fitted trend in annual mean temperature here over 1939 to 2011 is 0.03 C (-0.09 to 0.15) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.2 to 0.3) per decade. The slope is a straight line fitted to 40 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Bruneau
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.03 C (-0.09 to 0.15) per decade
0.1 F (-0.2 to 0.3) per decade
1939 to 2011
40
Not clearly different from zero
Mean daily maximum
-0.12 C (-0.27 to 0.03) per decade
-0.2 F (-0.5 to 0.1) per decade
1939 to 2011
40
Not clearly different from zero
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.3 F (0.1 to 0.5) per decade
1939 to 2011
40
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
1937 to 2012
Yearly extremes at Bruneau: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
45.0 C (113.0 F)
2002
40.6 C (105.1 F)
60
Coldest night (TNn)
-35.6 C (-32.1 F)
1990
-17.2 C (1.0 F)
60
Wettest day (Rx1day)
45.7 mm (1.8 in)
1971
16.9 mm (0.7 in)
60
Wettest five days (Rx5day)
65.4 mm (2.6 in)
1968
26.2 mm (1.0 in)
60
Longest dry spell (CDD)
165 days
1999
55 days
60
Hottest day (TXx)
The hottest day of the year at Bruneau, 1937 to 2012. The record is 45.0 C (113.0 F) in 2002, marked on the chart; the median year is 40.6 C (105.1 F).
Hottest day (TXx) at Bruneau by year
Year
Hottest day (TXx)
1937
17.2 C (63.0 F)
1938
37.8 C (100.0 F)
1939
43.3 C (109.9 F)
1940
40.0 C (104.0 F)
1941
37.8 C (100.0 F)
1942
40.0 C (104.0 F)
1943
38.3 C (100.9 F)
1944
41.1 C (106.0 F)
1945
41.1 C (106.0 F)
1962
40.0 C (104.0 F)
1963
40.0 C (104.0 F)
1964
40.0 C (104.0 F)
1965
39.4 C (102.9 F)
1966
40.0 C (104.0 F)
1967
41.1 C (106.0 F)
1968
42.2 C (108.0 F)
1969
40.6 C (105.1 F)
1970
40.0 C (104.0 F)
1971
41.7 C (107.1 F)
1972
41.1 C (106.0 F)
1973
43.9 C (111.0 F)
1974
41.7 C (107.1 F)
1975
42.2 C (108.0 F)
1976
39.4 C (102.9 F)
1977
40.6 C (105.1 F)
1978
40.6 C (105.1 F)
1979
41.1 C (106.0 F)
1980
42.8 C (109.0 F)
1981
40.6 C (105.1 F)
1982
38.9 C (102.0 F)
1983
42.2 C (108.0 F)
1984
39.4 C (102.9 F)
1985
40.6 C (105.1 F)
1986
40.6 C (105.1 F)
1987
39.4 C (102.9 F)
1988
40.6 C (105.1 F)
1989
42.2 C (108.0 F)
1990
41.7 C (107.1 F)
1991
40.0 C (104.0 F)
1992
40.0 C (104.0 F)
1993
37.8 C (100.0 F)
1994
40.0 C (104.0 F)
1995
40.0 C (104.0 F)
1996
38.3 C (100.9 F)
1997
38.3 C (100.9 F)
1998
41.7 C (107.1 F)
1999
38.9 C (102.0 F)
2000
40.0 C (104.0 F)
2001
40.6 C (105.1 F)
2002
45.0 C (113.0 F)
2003
43.3 C (109.9 F)
2004
39.4 C (102.9 F)
2005
41.1 C (106.0 F)
2006
42.8 C (109.0 F)
2007
40.6 C (105.1 F)
2008
41.1 C (106.0 F)
2009
42.2 C (108.0 F)
2010
41.7 C (107.1 F)
2011
41.7 C (107.1 F)
2012
42.8 C (109.0 F)
Coldest night (TNn)
The coldest night of the year at Bruneau, 1937 to 2012. The record is -35.6 C (-32.1 F) in 1990, marked on the chart; the median year is -17.2 C (1.0 F).
Coldest night (TNn) at Bruneau by year
Year
Coldest night (TNn)
1937
-8.3 C (17.1 F)
1938
-15.6 C (3.9 F)
1939
-12.8 C (9.0 F)
1940
-20.0 C (-4.0 F)
1941
-13.9 C (7.0 F)
1942
-26.7 C (-16.1 F)
1943
-20.6 C (-5.1 F)
1944
-21.1 C (-6.0 F)
1945
-12.8 C (9.0 F)
1962
-13.9 C (7.0 F)
1963
-18.3 C (-0.9 F)
1964
-19.4 C (-2.9 F)
1965
-14.4 C (6.1 F)
1966
-18.3 C (-0.9 F)
1967
-19.4 C (-2.9 F)
1968
-15.6 C (3.9 F)
1969
-17.8 C (0.0 F)
1970
-16.1 C (3.0 F)
1971
-16.1 C (3.0 F)
1972
-32.2 C (-26.0 F)
1973
-11.7 C (10.9 F)
1974
-22.2 C (-8.0 F)
1975
-17.8 C (0.0 F)
1976
-17.8 C (0.0 F)
1977
-21.1 C (-6.0 F)
1978
-23.9 C (-11.0 F)
1979
-26.7 C (-16.1 F)
1980
-20.6 C (-5.1 F)
1981
-10.6 C (12.9 F)
1982
-19.4 C (-2.9 F)
1983
-22.8 C (-9.0 F)
1984
-26.7 C (-16.1 F)
1985
-26.1 C (-15.0 F)
1986
-13.9 C (7.0 F)
1987
-19.4 C (-2.9 F)
1988
-16.7 C (1.9 F)
1989
-30.0 C (-22.0 F)
1990
-35.6 C (-32.1 F)
1991
-22.8 C (-9.0 F)
1992
-17.2 C (1.0 F)
1993
-18.9 C (-2.0 F)
1994
-14.4 C (6.1 F)
1995
-15.6 C (3.9 F)
1996
-19.4 C (-2.9 F)
1997
-15.6 C (3.9 F)
1998
-21.7 C (-7.1 F)
1999
-10.6 C (12.9 F)
2000
-12.8 C (9.0 F)
2001
-12.2 C (10.0 F)
2002
-12.8 C (9.0 F)
2003
-11.7 C (10.9 F)
2004
-13.3 C (8.1 F)
2005
-17.8 C (0.0 F)
2006
-13.9 C (7.0 F)
2007
-16.1 C (3.0 F)
2008
-17.2 C (1.0 F)
2009
-12.2 C (10.0 F)
2010
-5.0 C (23.0 F)
2011
-9.4 C (15.1 F)
2012
-7.8 C (18.0 F)
Wettest day (Rx1day)
The wettest day of the year at Bruneau, 1937 to 2012. The record is 45.7 mm (1.8 in) in 1971, marked on the chart; the median year is 16.9 mm (0.7 in).
Wettest day (Rx1day) at Bruneau by year
Year
Wettest day (Rx1day)
1937
6.6 mm (0.26 in)
1938
22.9 mm (0.9 in)
1939
10.4 mm (0.4 in)
1940
36.1 mm (1.4 in)
1941
26.7 mm (1.1 in)
1942
29.0 mm (1.1 in)
1943
18.3 mm (0.7 in)
1944
25.4 mm (1.0 in)
1945
11.4 mm (0.4 in)
1962
3.3 mm (0.13 in)
1963
20.3 mm (0.8 in)
1964
21.8 mm (0.9 in)
1965
13.2 mm (0.5 in)
1966
8.6 mm (0.34 in)
1967
12.7 mm (0.5 in)
1968
36.1 mm (1.4 in)
1969
14.0 mm (0.6 in)
1970
31.0 mm (1.2 in)
1971
45.7 mm (1.8 in)
1972
16.0 mm (0.6 in)
1973
11.9 mm (0.5 in)
1974
17.8 mm (0.7 in)
1975
24.4 mm (1.0 in)
1976
19.1 mm (0.8 in)
1977
10.7 mm (0.4 in)
1978
14.2 mm (0.6 in)
1979
13.5 mm (0.5 in)
1980
42.4 mm (1.7 in)
1981
18.5 mm (0.7 in)
1982
18.5 mm (0.7 in)
1983
27.4 mm (1.1 in)
1984
21.6 mm (0.9 in)
1985
15.7 mm (0.6 in)
1986
14.0 mm (0.6 in)
1987
8.9 mm (0.35 in)
1988
10.4 mm (0.4 in)
1989
13.2 mm (0.5 in)
1990
16.3 mm (0.6 in)
1991
43.2 mm (1.7 in)
1992
11.4 mm (0.4 in)
1993
16.0 mm (0.6 in)
1994
19.3 mm (0.8 in)
1995
30.5 mm (1.2 in)
1996
20.3 mm (0.8 in)
1997
17.3 mm (0.7 in)
1998
19.8 mm (0.8 in)
1999
10.9 mm (0.4 in)
2000
13.7 mm (0.5 in)
2001
12.7 mm (0.5 in)
2002
18.3 mm (0.7 in)
2003
13.7 mm (0.5 in)
2004
10.2 mm (0.4 in)
2005
30.2 mm (1.2 in)
2006
24.1 mm (0.9 in)
2007
25.1 mm (1.0 in)
2008
15.2 mm (0.6 in)
2009
18.5 mm (0.7 in)
2010
15.7 mm (0.6 in)
2011
16.5 mm (0.6 in)
2012
15.2 mm (0.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Bruneau, 1937 to 2012. The record is 65.4 mm (2.6 in) in 1968, marked on the chart; the median year is 26.2 mm (1.0 in).
Wettest five days (Rx5day) at Bruneau by year
Year
Wettest five days (Rx5day)
1937
8.7 mm (0.34 in)
1938
37.6 mm (1.5 in)
1939
16.5 mm (0.6 in)
1940
40.2 mm (1.6 in)
1941
28.5 mm (1.1 in)
1942
39.2 mm (1.5 in)
1943
56.9 mm (2.2 in)
1944
50.6 mm (2.0 in)
1945
29.1 mm (1.1 in)
1962
4.8 mm (0.19 in)
1963
29.2 mm (1.1 in)
1964
30.3 mm (1.2 in)
1965
20.3 mm (0.8 in)
1966
20.0 mm (0.8 in)
1967
19.1 mm (0.8 in)
1968
65.4 mm (2.6 in)
1969
19.9 mm (0.8 in)
1970
44.4 mm (1.7 in)
1971
53.6 mm (2.1 in)
1972
23.0 mm (0.9 in)
1973
16.0 mm (0.6 in)
1974
24.9 mm (1.0 in)
1975
35.1 mm (1.4 in)
1976
19.3 mm (0.8 in)
1977
17.5 mm (0.7 in)
1978
33.0 mm (1.3 in)
1979
22.3 mm (0.9 in)
1980
57.2 mm (2.3 in)
1981
29.0 mm (1.1 in)
1982
28.7 mm (1.1 in)
1983
27.5 mm (1.1 in)
1984
35.1 mm (1.4 in)
1985
34.3 mm (1.4 in)
1986
22.9 mm (0.9 in)
1987
13.4 mm (0.5 in)
1988
21.1 mm (0.8 in)
1989
20.1 mm (0.8 in)
1990
22.9 mm (0.9 in)
1991
46.5 mm (1.8 in)
1992
23.0 mm (0.9 in)
1993
24.6 mm (1.0 in)
1994
21.0 mm (0.8 in)
1995
37.9 mm (1.5 in)
1996
41.4 mm (1.6 in)
1997
30.2 mm (1.2 in)
1998
22.4 mm (0.9 in)
1999
17.2 mm (0.7 in)
2000
19.3 mm (0.8 in)
2001
20.8 mm (0.8 in)
2002
22.8 mm (0.9 in)
2003
15.5 mm (0.6 in)
2004
17.3 mm (0.7 in)
2005
36.6 mm (1.4 in)
2006
33.1 mm (1.3 in)
2007
30.2 mm (1.2 in)
2008
15.7 mm (0.6 in)
2009
30.2 mm (1.2 in)
2010
30.4 mm (1.2 in)
2011
27.7 mm (1.1 in)
2012
24.9 mm (1.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Bruneau, 1937 to 2012. The record is 165 days in 1999, marked on the chart; the median year is 55 days.
Longest dry spell (CDD) at Bruneau by year
Year
Longest dry spell (CDD)
1937
15 days
1938
62 days
1939
31 days
1940
62 days
1941
39 days
1942
88 days
1943
130 days
1944
48 days
1945
34 days
1962
49 days
1963
61 days
1964
35 days
1965
46 days
1966
56 days
1967
50 days
1968
54 days
1969
74 days
1970
39 days
1971
62 days
1972
81 days
1973
42 days
1974
125 days
1975
68 days
1976
47 days
1977
36 days
1978
53 days
1979
55 days
1980
46 days
1981
80 days
1982
52 days
1983
36 days
1984
38 days
1985
57 days
1986
92 days
1987
107 days
1988
110 days
1989
40 days
1990
40 days
1991
49 days
1992
120 days
1993
32 days
1994
68 days
1995
36 days
1996
33 days
1997
30 days
1998
39 days
1999
165 days
2000
113 days
2001
44 days
2002
125 days
2003
98 days
2004
40 days
2005
80 days
2006
96 days
2007
82 days
2008
100 days
2009
56 days
2010
64 days
2011
77 days
2012
31 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
40 years with a frost
Across 40 years with a frost, the median last spring frost at Bruneau falls on 7 May and the median first autumn frost on 5 October, which leaves a median of 146 days between them.
Fitted over all years, the growing season changes by +1.6 days per decade at this station.
Frost dates and growing season at Bruneau
Measure
Median, all years
Earliest period
Recent period (1974 to 2011)
Recent against earliest
Fitted trend
Last spring frost
7 May
n/a
5 May
n/a
-1.0 days per decade
First autumn frost
5 October
n/a
8 October
n/a
+0.6 days per decade
Growing days
146 days
n/a
154 days
n/a
+1.6 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
47 years, 1939 to 2011
A day with at least 18.0 mm (0.7 in) of rain is expected about once in 2 years. A day with at least 56.6 mm (2.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Bruneau: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
18.0 mm (0.7 in)
5 years
26.1 mm (1.0 in)
10 years
32.2 mm (1.3 in)
25 years
41.0 mm (1.6 in)
50 years
48.4 mm (1.9 in)
Longer than the 47 years of record
100 years
56.6 mm (2.2 in)
Longer than the 47 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, 47 years of values from 1939 to 2011.
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: 45.7 mm (1.8 in) in 1971; 43.2 mm (1.7 in) in 1991; 42.4 mm (1.7 in) in 1980.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Bruneau standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Bruneau 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.