Record envelope, standing records and threshold days for Headquarters (USC00104150), Idaho, United States, with 52 years of record.
Key Facts for Headquarters
Headquarters (USC00104150) is a weather station in Idaho, United States at 46.63 latitude and -115.81 longitude, 975 m (3,200 ft) above sea level.
The station reports from 1959 to 2010, 52 years of record.
1,464 records set at Headquarters still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Headquarters tied a daily record low minimum temperature of -4.4 C (24.1 F) on 5 May 2010.
About the Station
Location: Idaho, United States, 46.63 latitude, -115.81 longitude.
Elevation: 975 m (3,200 ft).
Period of record: 1959 to 2010, 52 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 Headquarters. 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 Headquarters, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
12.8 C (55.0 F)
-32.8 C (-27.0 F)
n/a
n/a
Feb
17.8 C (64.0 F)
-29.4 C (-20.9 F)
n/a
n/a
Mar
22.2 C (72.0 F)
-23.9 C (-11.0 F)
n/a
n/a
Apr
31.1 C (88.0 F)
-15.6 C (3.9 F)
n/a
n/a
May
36.1 C (97.0 F)
-7.2 C (19.0 F)
n/a
n/a
Jun
36.1 C (97.0 F)
-3.9 C (25.0 F)
n/a
n/a
Jul
38.9 C (102.0 F)
-3.3 C (26.1 F)
n/a
n/a
Aug
42.2 C (108.0 F)
-2.2 C (28.0 F)
n/a
n/a
Sep
37.2 C (99.0 F)
-7.8 C (18.0 F)
n/a
n/a
Oct
29.4 C (84.9 F)
-17.2 C (1.0 F)
n/a
n/a
Nov
20.6 C (69.1 F)
-30.0 C (-22.0 F)
n/a
n/a
Dec
12.8 C (55.0 F)
-33.3 C (-27.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Headquarters still stand. 1975 holds the most, with 55.
Standing records at Headquarters by the year they were set
Year set
Standing records
1959
30
1960
30
1961
38
1962
48
1963
35
1964
34
1965
36
1966
36
1967
30
1968
33
1969
28
1970
37
1971
37
1972
52
1973
30
1974
40
1975
55
1976
29
1977
35
1978
18
1979
31
1980
31
1981
24
1982
26
1983
39
1984
27
1985
30
1986
22
1987
24
1988
20
1989
20
1990
19
1991
16
1992
4
1993
20
1994
27
1995
28
1996
40
1997
20
1998
26
1999
33
2000
20
2001
13
2002
36
2003
26
2004
9
2005
17
2006
31
2007
28
2008
21
2009
19
2010
6
All-Time Record Progression
4 new records
4 all-time records were set at Headquarters between 3 February 1989 and 28 December 2008. Each dot is a new record.
When Headquarters set new all-time records
Date
Kind
Detail
1989-02-03
Record low maximum temperature
Record low maximum temperature -20.6 C (-5.1 F)
1994-11-01
Record daily precipitation
Record daily precipitation 53.1 mm (2.1 in)
1996-04-24
Record daily precipitation
Record daily precipitation 58.4 mm (2.3 in)
2008-12-28
Record daily precipitation
Record daily precipitation 72.1 mm (2.8 in)
Wettest Day of Each Month
Dec: 72.1 mm (2.8 in)
The wettest day on record for each calendar month at Headquarters. The most was 72.1 mm (2.8 in) on 28 December 2008.
Record daily precipitation for each month at Headquarters
Month
Record daily precipitation (mm)
Date
Jan
64.0 mm (2.5 in)
2 January 2009
Feb
52.6 mm (2.1 in)
24 February 1999
Mar
55.4 mm (2.2 in)
28 March 2005
Apr
58.4 mm (2.3 in)
24 April 1996
May
48.8 mm (1.9 in)
30 May 1985
Jun
46.0 mm (1.8 in)
15 June 1970
Jul
40.4 mm (1.6 in)
1 July 1997
Aug
37.8 mm (1.5 in)
24 August 1975
Sep
36.3 mm (1.4 in)
11 September 1962
Oct
55.9 mm (2.2 in)
1 October 2000
Nov
53.1 mm (2.1 in)
1 November 1994
Dec
72.1 mm (2.8 in)
28 December 2008
Period of Record Coverage
1959 to 2010
Complete yearUnder 90 percent of days
52 years of record at Headquarters, 1959 to 2010. 17 years have data for under 90 percent of days and are left out of rankings: 1959, 1978, 1979, 1980, 1982, 1984, 1985, 1986 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 34 complete years at Headquarters, 1960 to 2009. Blue stripes are years cooler than the station's own mean of 6.3 C (43.4 F); red stripes are warmer. The coolest year was 1964, at 5.1 C (41.2 F), and the warmest was 1998, at 7.5 C (45.6 F). The strongest colour marks a difference of 1.3 C (2.3 F).
Annual mean temperature at Headquarters as warming stripes, 1960 to 2009
Year
Annual mean temperature
Difference from the station mean
1960
6.1 C
-0.20 C
1961
6.5 C
+0.19 C
1962
5.9 C
-0.46 C
1963
6.3 C
-0.07 C
1964
5.1 C
-1.20 C
1965
6.6 C
+0.25 C
1966
7.2 C
+0.87 C
1967
6.9 C
+0.56 C
1968
6.1 C
-0.19 C
1969
5.9 C
-0.45 C
1970
6.3 C
-0.03 C
1971
5.2 C
-1.11 C
1972
6.1 C
-0.28 C
1973
6.6 C
+0.25 C
1974
6.5 C
+0.15 C
1975
5.2 C
-1.17 C
1976
5.7 C
-0.62 C
1980
6.7 C
+0.39 C
1981
7.4 C
+1.08 C
1983
6.8 C
+0.51 C
1994
6.9 C
+0.56 C
1995
6.4 C
+0.09 C
1996
6.0 C
-0.29 C
1997
6.5 C
+0.21 C
1998
7.5 C
+1.21 C
1999
6.4 C
+0.10 C
2000
6.2 C
-0.18 C
2001
6.5 C
+0.15 C
2002
5.9 C
-0.47 C
2003
6.9 C
+0.61 C
2005
6.3 C
-0.06 C
2006
6.7 C
+0.34 C
2007
6.5 C
+0.12 C
2009
5.3 C
-1.00 C
The fitted trend in annual mean temperature here over 1960 to 2009 is 0.1 C (-0.1 to 0.2) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.3) per decade. The slope is a straight line fitted to 34 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Headquarters
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.1 to 0.2) per decade
0.1 F (-0.1 to 0.3) per decade
1960 to 2009
34
Not clearly different from zero
Mean daily maximum
-0.19 C (-0.33 to -0.05) per decade
-0.3 F (-0.6 to -0.1) per decade
1960 to 2009
34
Fall
Mean daily minimum
0.3 C (0.1 to 0.5) per decade
0.5 F (0.3 to 0.8) per decade
1960 to 2009
34
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
1959 to 2010
Yearly extremes at Headquarters: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.2 C (108.0 F)
1961
35.9 C (96.5 F)
52
Coldest night (TNn)
-33.3 C (-27.9 F)
1968
-23.6 C (-10.5 F)
52
Wettest day (Rx1day)
72.1 mm (2.8 in)
2008
38.5 mm (1.5 in)
52
Wettest five days (Rx5day)
129.4 mm (5.1 in)
2003
80.8 mm (3.2 in)
52
Longest dry spell (CDD)
79 days
1967
32 days
52
Hottest day (TXx)
The hottest day of the year at Headquarters, 1959 to 2010. The record is 42.2 C (108.0 F) in 1961, marked on the chart; the median year is 35.9 C (96.5 F).
Hottest day (TXx) at Headquarters by year
Year
Hottest day (TXx)
1959
38.9 C (102.0 F)
1960
37.8 C (100.0 F)
1961
42.2 C (108.0 F)
1962
36.1 C (97.0 F)
1963
34.4 C (93.9 F)
1964
36.1 C (97.0 F)
1965
35.6 C (96.1 F)
1966
36.7 C (98.1 F)
1967
38.9 C (102.0 F)
1968
35.0 C (95.0 F)
1969
37.8 C (100.0 F)
1970
36.7 C (98.1 F)
1971
36.1 C (97.0 F)
1972
35.6 C (96.1 F)
1973
36.1 C (97.0 F)
1974
36.1 C (97.0 F)
1975
37.2 C (99.0 F)
1976
35.0 C (95.0 F)
1977
35.6 C (96.1 F)
1978
34.4 C (93.9 F)
1979
36.7 C (98.1 F)
1980
36.7 C (98.1 F)
1981
35.0 C (95.0 F)
1982
34.4 C (93.9 F)
1983
37.8 C (100.0 F)
1984
37.2 C (99.0 F)
1985
37.8 C (100.0 F)
1986
36.7 C (98.1 F)
1987
35.0 C (95.0 F)
1988
37.2 C (99.0 F)
1989
35.0 C (95.0 F)
1990
36.1 C (97.0 F)
1991
33.9 C (93.0 F)
1992
21.1 C (70.0 F)
1993
32.2 C (90.0 F)
1994
36.1 C (97.0 F)
1995
30.0 C (86.0 F)
1996
34.4 C (93.9 F)
1997
33.9 C (93.0 F)
1998
36.1 C (97.0 F)
1999
35.0 C (95.0 F)
2000
34.4 C (93.9 F)
2001
35.0 C (95.0 F)
2002
36.7 C (98.1 F)
2003
35.0 C (95.0 F)
2004
32.8 C (91.0 F)
2005
35.0 C (95.0 F)
2006
35.0 C (95.0 F)
2007
36.1 C (97.0 F)
2008
36.7 C (98.1 F)
2009
33.3 C (91.9 F)
2010
25.0 C (77.0 F)
Coldest night (TNn)
The coldest night of the year at Headquarters, 1959 to 2010. The record is -33.3 C (-27.9 F) in 1968, marked on the chart; the median year is -23.6 C (-10.5 F).
Coldest night (TNn) at Headquarters by year
Year
Coldest night (TNn)
1959
-20.6 C (-5.1 F)
1960
-26.7 C (-16.1 F)
1961
-24.4 C (-11.9 F)
1962
-32.8 C (-27.0 F)
1963
-28.9 C (-20.0 F)
1964
-32.2 C (-26.0 F)
1965
-19.4 C (-2.9 F)
1966
-21.1 C (-6.0 F)
1967
-20.6 C (-5.1 F)
1968
-33.3 C (-27.9 F)
1969
-21.1 C (-6.0 F)
1970
-18.9 C (-2.0 F)
1971
-21.1 C (-6.0 F)
1972
-25.6 C (-14.1 F)
1973
-21.7 C (-7.1 F)
1974
-26.7 C (-16.1 F)
1975
-23.3 C (-9.9 F)
1976
-24.4 C (-11.9 F)
1977
-21.1 C (-6.0 F)
1978
-24.4 C (-11.9 F)
1979
-31.7 C (-25.1 F)
1980
-25.6 C (-14.1 F)
1981
-23.3 C (-9.9 F)
1982
-25.0 C (-13.0 F)
1983
-30.6 C (-23.1 F)
1984
-24.4 C (-11.9 F)
1985
-30.0 C (-22.0 F)
1986
-17.8 C (0.0 F)
1987
-22.2 C (-8.0 F)
1988
-25.0 C (-13.0 F)
1989
-29.4 C (-20.9 F)
1990
-32.2 C (-26.0 F)
1991
-25.0 C (-13.0 F)
1992
-17.2 C (1.0 F)
1993
-20.6 C (-5.1 F)
1994
-20.0 C (-4.0 F)
1995
-21.7 C (-7.1 F)
1996
-28.3 C (-18.9 F)
1997
-22.8 C (-9.0 F)
1998
-25.0 C (-13.0 F)
1999
-13.9 C (7.0 F)
2000
-17.2 C (1.0 F)
2001
-17.8 C (0.0 F)
2002
-18.3 C (-0.9 F)
2003
-16.7 C (1.9 F)
2004
-25.0 C (-13.0 F)
2005
-22.2 C (-8.0 F)
2006
-25.0 C (-13.0 F)
2007
-26.7 C (-16.1 F)
2008
-23.3 C (-9.9 F)
2009
-23.9 C (-11.0 F)
2010
-13.9 C (7.0 F)
Wettest day (Rx1day)
The wettest day of the year at Headquarters, 1959 to 2010. The record is 72.1 mm (2.8 in) in 2008, marked on the chart; the median year is 38.5 mm (1.5 in).
Wettest day (Rx1day) at Headquarters by year
Year
Wettest day (Rx1day)
1959
38.1 mm (1.5 in)
1960
34.8 mm (1.4 in)
1961
42.2 mm (1.7 in)
1962
49.0 mm (1.9 in)
1963
33.5 mm (1.3 in)
1964
50.8 mm (2.0 in)
1965
43.4 mm (1.7 in)
1966
48.3 mm (1.9 in)
1967
36.6 mm (1.4 in)
1968
42.4 mm (1.7 in)
1969
37.6 mm (1.5 in)
1970
46.0 mm (1.8 in)
1971
45.5 mm (1.8 in)
1972
39.4 mm (1.6 in)
1973
29.0 mm (1.1 in)
1974
36.8 mm (1.4 in)
1975
38.6 mm (1.5 in)
1976
38.4 mm (1.5 in)
1977
50.8 mm (2.0 in)
1978
28.7 mm (1.1 in)
1979
33.5 mm (1.3 in)
1980
27.2 mm (1.1 in)
1981
39.9 mm (1.6 in)
1982
27.7 mm (1.1 in)
1983
35.8 mm (1.4 in)
1984
25.4 mm (1.0 in)
1985
48.8 mm (1.9 in)
1986
22.6 mm (0.9 in)
1987
33.0 mm (1.3 in)
1988
21.3 mm (0.8 in)
1989
35.6 mm (1.4 in)
1990
27.9 mm (1.1 in)
1991
26.7 mm (1.1 in)
1992
10.4 mm (0.4 in)
1993
23.4 mm (0.9 in)
1994
53.1 mm (2.1 in)
1995
37.3 mm (1.5 in)
1996
58.4 mm (2.3 in)
1997
40.4 mm (1.6 in)
1998
39.4 mm (1.6 in)
1999
52.6 mm (2.1 in)
2000
55.9 mm (2.2 in)
2001
39.4 mm (1.6 in)
2002
29.2 mm (1.1 in)
2003
47.0 mm (1.9 in)
2004
35.1 mm (1.4 in)
2005
55.4 mm (2.2 in)
2006
46.0 mm (1.8 in)
2007
48.0 mm (1.9 in)
2008
72.1 mm (2.8 in)
2009
64.0 mm (2.5 in)
2010
31.2 mm (1.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Headquarters, 1959 to 2010. The record is 129.4 mm (5.1 in) in 2003, marked on the chart; the median year is 80.8 mm (3.2 in).
Wettest five days (Rx5day) at Headquarters by year
Year
Wettest five days (Rx5day)
1959
80.5 mm (3.2 in)
1960
82.6 mm (3.3 in)
1961
83.2 mm (3.3 in)
1962
107.9 mm (4.2 in)
1963
87.2 mm (3.4 in)
1964
110.7 mm (4.4 in)
1965
94.5 mm (3.7 in)
1966
82.4 mm (3.2 in)
1967
77.2 mm (3.0 in)
1968
111.3 mm (4.4 in)
1969
83.6 mm (3.3 in)
1970
81.1 mm (3.2 in)
1971
72.4 mm (2.9 in)
1972
93.7 mm (3.7 in)
1973
84.9 mm (3.3 in)
1974
107.6 mm (4.2 in)
1975
99.6 mm (3.9 in)
1976
80.6 mm (3.2 in)
1977
71.9 mm (2.8 in)
1978
50.6 mm (2.0 in)
1979
49.2 mm (1.9 in)
1980
52.7 mm (2.1 in)
1981
73.0 mm (2.9 in)
1982
56.9 mm (2.2 in)
1983
61.2 mm (2.4 in)
1984
62.2 mm (2.4 in)
1985
57.2 mm (2.3 in)
1986
27.9 mm (1.1 in)
1987
29.2 mm (1.1 in)
1988
30.5 mm (1.2 in)
1989
36.4 mm (1.4 in)
1990
41.9 mm (1.6 in)
1991
43.7 mm (1.7 in)
1992
23.4 mm (0.9 in)
1993
45.7 mm (1.8 in)
1994
86.6 mm (3.4 in)
1995
107.0 mm (4.2 in)
1996
105.1 mm (4.1 in)
1997
107.6 mm (4.2 in)
1998
86.6 mm (3.4 in)
1999
110.1 mm (4.3 in)
2000
73.2 mm (2.9 in)
2001
66.8 mm (2.6 in)
2002
57.6 mm (2.3 in)
2003
129.4 mm (5.1 in)
2004
81.0 mm (3.2 in)
2005
93.8 mm (3.7 in)
2006
119.8 mm (4.7 in)
2007
99.1 mm (3.9 in)
2008
74.9 mm (2.9 in)
2009
93.5 mm (3.7 in)
2010
73.9 mm (2.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Headquarters, 1959 to 2010. The record is 79 days in 1967, marked on the chart; the median year is 32 days.
Longest dry spell (CDD) at Headquarters by year
Year
Longest dry spell (CDD)
1959
42 days
1960
30 days
1961
68 days
1962
21 days
1963
43 days
1964
14 days
1965
14 days
1966
34 days
1967
79 days
1968
24 days
1969
43 days
1970
31 days
1971
42 days
1972
15 days
1973
67 days
1974
39 days
1975
18 days
1976
22 days
1977
30 days
1978
35 days
1979
34 days
1980
33 days
1981
42 days
1982
13 days
1983
15 days
1984
32 days
1985
35 days
1986
46 days
1987
32 days
1988
32 days
1989
22 days
1990
21 days
1991
35 days
1992
11 days
1993
15 days
1994
25 days
1995
20 days
1996
24 days
1997
22 days
1998
41 days
1999
37 days
2000
37 days
2001
42 days
2002
23 days
2003
34 days
2004
30 days
2005
38 days
2006
32 days
2007
31 days
2008
40 days
2009
17 days
2010
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
34 years with a frost
Across 34 years with a frost, the median last spring frost at Headquarters falls on 8 June and the median first autumn frost on 8 September, which leaves a median of 95 days between them.
Fitted over all years, the growing season changes by +8.1 days per decade at this station.
Frost dates and growing season at Headquarters
Measure
Median, all years
Earliest period
Recent period (1964 to 2009)
Recent against earliest
Fitted trend
Last spring frost
8 June
n/a
7 June
n/a
-2.4 days per decade
First autumn frost
8 September
n/a
9 September
n/a
+5.6 days per decade
Growing days
95 days
n/a
96 days
n/a
+8.1 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
35 years, 1960 to 2009
A day with at least 43.0 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 74.5 mm (2.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Headquarters: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
43.0 mm (1.7 in)
5 years
51.6 mm (2.0 in)
10 years
57.2 mm (2.3 in)
25 years
64.2 mm (2.5 in)
50 years
69.4 mm (2.7 in)
Longer than the 35 years of record
100 years
74.5 mm (2.9 in)
Longer than the 35 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, 35 years of values from 1960 to 2009.
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: 72.1 mm (2.8 in) in 2008; 64.0 mm (2.5 in) in 2009; 58.4 mm (2.3 in) in 1996.
Download the Data
Data for Headquarters standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Headquarters 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.