Record envelope, standing records and threshold days for Mtn Home (USC00106174), Idaho, United States, with 102 years of record.
Key Facts for Mtn Home
Mtn Home (USC00106174) is a weather station in Idaho, United States at 43.13 latitude and -115.71 longitude, 957 m (3,140 ft) above sea level.
The station reports from 1906 to 2007, 102 years of record.
1,464 records set at Mtn Home still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Mtn Home set a daily record high minimum temperature of 11.7 C (53.1 F) on 29 October 2007.
About the Station
Location: Idaho, United States, 43.13 latitude, -115.71 longitude.
Elevation: 957 m (3,140 ft).
Period of record: 1906 to 2007, 102 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 Mtn Home. 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 Mtn Home, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
18.9 C (66.0 F)
-33.9 C (-29.0 F)
n/a
n/a
Feb
22.2 C (72.0 F)
-27.8 C (-18.0 F)
n/a
n/a
Mar
27.8 C (82.0 F)
-15.6 C (3.9 F)
n/a
n/a
Apr
34.4 C (93.9 F)
-17.2 C (1.0 F)
n/a
n/a
May
41.7 C (107.1 F)
-9.4 C (15.1 F)
n/a
n/a
Jun
41.7 C (107.1 F)
-6.7 C (19.9 F)
n/a
n/a
Jul
46.1 C (115.0 F)
-1.7 C (28.9 F)
n/a
n/a
Aug
42.8 C (109.0 F)
-3.3 C (26.1 F)
n/a
n/a
Sep
41.7 C (107.1 F)
-12.8 C (9.0 F)
n/a
n/a
Oct
34.4 C (93.9 F)
-13.9 C (7.0 F)
n/a
n/a
Nov
26.1 C (79.0 F)
-23.3 C (-9.9 F)
n/a
n/a
Dec
19.4 C (66.9 F)
-37.8 C (-36.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Mtn Home still stand. 1953 holds the most, with 39.
Standing records at Mtn Home by the year they were set
Year set
Standing records
1906
32
1907
15
1908
17
1909
13
1910
21
1911
19
1912
14
1913
17
1914
9
1915
20
1916
24
1917
33
1918
28
1919
24
1920
15
1921
22
1922
11
1923
8
1924
26
1925
8
1926
25
1927
18
1928
7
1929
23
1930
10
1931
8
1932
8
1933
20
1934
22
1935
15
1936
19
1937
19
1938
9
1939
15
1940
11
1941
7
1942
11
1943
9
1944
8
1945
6
1946
6
1947
6
1948
8
1949
19
1950
16
1951
8
1952
8
1953
39
1954
23
1955
26
1956
15
1957
8
1958
15
1959
11
1960
9
1961
11
1962
8
1963
9
1964
13
1965
19
1966
6
1967
8
1968
13
1969
16
1970
11
1971
9
1972
20
1973
10
1974
15
1975
15
1976
9
1977
21
1978
3
1979
10
1980
14
1981
8
1982
5
1983
13
1984
9
1985
26
1986
18
1987
12
1988
18
1989
12
1990
21
1991
3
1992
20
1993
15
1994
10
1995
10
1996
10
1997
6
1998
11
1999
9
2000
10
2001
23
2002
22
2003
28
2004
8
2005
7
2006
15
2007
12
All-Time Record Progression
7 new records
7 all-time records were set at Mtn Home between 15 July 1955 and 13 July 2002. Each dot is a new record.
When Mtn Home set new all-time records
Date
Kind
Detail
1955-07-15
Record high maximum temperature
Record high maximum temperature 43.3 C (109.9 F)
1976-07-31
Record daily precipitation
Record daily precipitation 50.0 mm (2.0 in)
1990-12-23
Record low maximum temperature
Record low maximum temperature -20.6 C (-5.1 F)
1998-07-17
Record high maximum temperature
Record high maximum temperature 44.4 C (111.9 F)
2001-07-05
Record high minimum temperature
Record high minimum temperature 26.7 C (80.1 F)
2002-07-12
Record high maximum temperature
Record high maximum temperature 45.6 C (114.1 F)
2002-07-13
Record high maximum temperature
Record high maximum temperature 46.1 C (115.0 F)
Wettest Day of Each Month
Jul: 50.0 mm (2.0 in)
The wettest day on record for each calendar month at Mtn Home. The most was 50.0 mm (2.0 in) on 31 July 1976.
Record daily precipitation for each month at Mtn Home
Month
Record daily precipitation (mm)
Date
Jan
40.6 mm (1.6 in)
28 January 1965
Feb
19.8 mm (0.8 in)
15 February 1949
Mar
36.1 mm (1.4 in)
8 March 1943
Apr
24.9 mm (1.0 in)
4 April 2006
May
33.8 mm (1.3 in)
18 May 2005
Jun
35.6 mm (1.4 in)
29 June 1970
Jul
50.0 mm (2.0 in)
31 July 1976
Aug
39.4 mm (1.6 in)
22 August 1961
Sep
42.7 mm (1.7 in)
11 September 1980
Oct
38.1 mm (1.5 in)
30 October 1933
Nov
25.9 mm (1.0 in)
30 November 1921
Dec
26.9 mm (1.1 in)
8 December 2004
Period of Record Coverage
1906 to 2007
Complete yearUnder 90 percent of days
102 years of record at Mtn Home, 1906 to 2007. 11 years have data for under 90 percent of days and are left out of rankings: 1911, 1932, 1952, 1959, 1960, 1966, 1971, 1972 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 83 complete years at Mtn Home, 1907 to 2006. Blue stripes are years cooler than the station's own mean of 10.1 C (50.2 F); red stripes are warmer. The coolest year was 1985, at 8.2 C (46.7 F), and the warmest was 2003, at 12.2 C (53.9 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Mtn Home as warming stripes, 1907 to 2006
Year
Annual mean temperature
Difference from the station mean
1907
9.9 C
-0.24 C
1908
9.5 C
-0.61 C
1909
9.6 C
-0.54 C
1910
9.9 C
-0.24 C
1912
8.4 C
-1.70 C
1913
8.6 C
-1.46 C
1915
10.0 C
-0.14 C
1916
8.7 C
-1.38 C
1917
8.6 C
-1.46 C
1919
9.0 C
-1.07 C
1920
9.1 C
-1.00 C
1921
9.9 C
-0.15 C
1922
8.9 C
-1.19 C
1923
9.3 C
-0.76 C
1924
9.2 C
-0.93 C
1925
9.9 C
-0.17 C
1926
10.3 C
+0.20 C
1927
9.5 C
-0.58 C
1928
9.0 C
-1.09 C
1929
8.5 C
-1.64 C
1931
10.1 C
-0.02 C
1933
9.2 C
-0.85 C
1934
12.0 C
+1.93 C
1935
9.3 C
-0.79 C
1936
10.0 C
-0.13 C
1937
9.4 C
-0.67 C
1938
9.9 C
-0.15 C
1939
10.2 C
+0.07 C
1940
10.6 C
+0.55 C
1941
10.3 C
+0.16 C
1942
9.3 C
-0.81 C
1943
10.2 C
+0.12 C
1944
9.5 C
-0.64 C
1945
9.8 C
-0.30 C
1946
9.9 C
-0.23 C
1947
10.1 C
-0.02 C
1948
9.2 C
-0.89 C
1949
9.3 C
-0.84 C
1950
10.3 C
+0.17 C
1953
12.1 C
+2.04 C
1954
11.7 C
+1.63 C
1955
9.6 C
-0.45 C
1956
10.4 C
+0.30 C
1957
10.4 C
+0.27 C
1958
11.4 C
+1.31 C
1961
10.8 C
+0.72 C
1962
10.0 C
-0.06 C
1963
10.6 C
+0.51 C
1964
9.2 C
-0.89 C
1965
10.2 C
+0.08 C
1967
10.3 C
+0.19 C
1968
9.9 C
-0.24 C
1969
10.5 C
+0.41 C
1970
10.3 C
+0.21 C
1971
10.0 C
-0.14 C
1974
10.1 C
-0.02 C
1975
9.3 C
-0.75 C
1976
9.7 C
-0.42 C
1977
10.5 C
+0.42 C
1981
11.2 C
+1.09 C
1982
9.4 C
-0.65 C
1983
10.7 C
+0.63 C
1984
9.1 C
-0.96 C
1985
8.2 C
-1.90 C
1986
11.1 C
+1.00 C
1987
11.3 C
+1.22 C
1988
11.1 C
+1.01 C
1989
10.2 C
+0.09 C
1991
10.4 C
+0.26 C
1992
11.5 C
+1.42 C
1993
8.9 C
-1.18 C
1994
11.1 C
+1.05 C
1996
10.8 C
+0.72 C
1997
10.9 C
+0.82 C
1998
10.7 C
+0.60 C
1999
10.8 C
+0.66 C
2000
11.3 C
+1.18 C
2001
11.7 C
+1.57 C
2002
10.6 C
+0.55 C
2003
12.2 C
+2.08 C
2004
11.2 C
+1.15 C
2005
11.2 C
+1.10 C
2006
11.3 C
+1.20 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1907 to 2006. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 83 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Mtn Home
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.2) per decade
0.3 F (0.2 to 0.4) per decade
1907 to 2006
83
Rise
Mean daily maximum
0.06 C (-0.01 to 0.14) per decade
0.11 F (-0.02 to 0.24) per decade
1907 to 2006
83
Not clearly different from zero
Mean daily minimum
0.3 C (0.2 to 0.3) per decade
0.5 F (0.4 to 0.6) per decade
1907 to 2006
83
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
1906 to 2007
Yearly extremes at Mtn Home: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
46.1 C (115.0 F)
2002
40.0 C (104.0 F)
102
Coldest night (TNn)
-37.8 C (-36.0 F)
1924
-20.6 C (-5.1 F)
102
Wettest day (Rx1day)
50.0 mm (2.0 in)
1976
20.6 mm (0.8 in)
102
Wettest five days (Rx5day)
71.9 mm (2.8 in)
1968
33.3 mm (1.3 in)
102
Longest dry spell (CDD)
146 days
1999
55 days
102
Hottest day (TXx)
The hottest day of the year at Mtn Home, 1906 to 2007. The record is 46.1 C (115.0 F) in 2002, marked on the chart; the median year is 40.0 C (104.0 F).
Hottest day (TXx) at Mtn Home by year
Year
Hottest day (TXx)
1906
40.0 C (104.0 F)
1907
38.9 C (102.0 F)
1908
41.1 C (106.0 F)
1909
40.6 C (105.1 F)
1910
39.4 C (102.9 F)
1911
37.8 C (100.0 F)
1912
37.2 C (99.0 F)
1913
38.3 C (100.9 F)
1914
38.9 C (102.0 F)
1915
41.1 C (106.0 F)
1916
40.6 C (105.1 F)
1917
40.0 C (104.0 F)
1918
38.3 C (100.9 F)
1919
38.9 C (102.0 F)
1920
40.0 C (104.0 F)
1921
38.9 C (102.0 F)
1922
39.4 C (102.9 F)
1923
37.2 C (99.0 F)
1924
41.1 C (106.0 F)
1925
41.7 C (107.1 F)
1926
40.6 C (105.1 F)
1927
37.8 C (100.0 F)
1928
37.8 C (100.0 F)
1929
40.6 C (105.1 F)
1930
39.4 C (102.9 F)
1931
41.7 C (107.1 F)
1932
37.8 C (100.0 F)
1933
41.1 C (106.0 F)
1934
41.7 C (107.1 F)
1935
40.6 C (105.1 F)
1936
40.0 C (104.0 F)
1937
38.9 C (102.0 F)
1938
36.1 C (97.0 F)
1939
37.8 C (100.0 F)
1940
40.0 C (104.0 F)
1941
37.2 C (99.0 F)
1942
38.9 C (102.0 F)
1943
38.3 C (100.9 F)
1944
37.2 C (99.0 F)
1945
37.8 C (100.0 F)
1946
38.9 C (102.0 F)
1947
40.0 C (104.0 F)
1948
38.9 C (102.0 F)
1949
38.9 C (102.0 F)
1950
41.1 C (106.0 F)
1951
40.0 C (104.0 F)
1952
37.8 C (100.0 F)
1953
41.7 C (107.1 F)
1954
40.6 C (105.1 F)
1955
43.3 C (109.9 F)
1956
42.2 C (108.0 F)
1957
38.9 C (102.0 F)
1958
41.1 C (106.0 F)
1959
41.1 C (106.0 F)
1960
41.7 C (107.1 F)
1961
41.1 C (106.0 F)
1962
39.4 C (102.9 F)
1963
40.6 C (105.1 F)
1964
37.8 C (100.0 F)
1965
38.3 C (100.9 F)
1966
38.9 C (102.0 F)
1967
40.6 C (105.1 F)
1968
42.2 C (108.0 F)
1969
42.8 C (109.0 F)
1970
40.0 C (104.0 F)
1971
40.0 C (104.0 F)
1972
40.6 C (105.1 F)
1973
42.2 C (108.0 F)
1974
41.7 C (107.1 F)
1975
42.2 C (108.0 F)
1976
40.0 C (104.0 F)
1977
41.1 C (106.0 F)
1978
40.6 C (105.1 F)
1979
40.0 C (104.0 F)
1980
42.2 C (108.0 F)
1981
40.0 C (104.0 F)
1982
38.9 C (102.0 F)
1983
42.2 C (108.0 F)
1984
38.9 C (102.0 F)
1985
40.0 C (104.0 F)
1986
40.0 C (104.0 F)
1987
40.0 C (104.0 F)
1988
40.6 C (105.1 F)
1989
42.2 C (108.0 F)
1990
42.8 C (109.0 F)
1991
40.0 C (104.0 F)
1992
41.1 C (106.0 F)
1993
37.2 C (99.0 F)
1994
41.1 C (106.0 F)
1995
40.6 C (105.1 F)
1996
41.1 C (106.0 F)
1997
40.0 C (104.0 F)
1998
44.4 C (111.9 F)
1999
40.6 C (105.1 F)
2000
42.8 C (109.0 F)
2001
43.3 C (109.9 F)
2002
46.1 C (115.0 F)
2003
46.1 C (115.0 F)
2004
41.7 C (107.1 F)
2005
42.2 C (108.0 F)
2006
42.8 C (109.0 F)
2007
40.6 C (105.1 F)
Coldest night (TNn)
The coldest night of the year at Mtn Home, 1906 to 2007. The record is -37.8 C (-36.0 F) in 1924, marked on the chart; the median year is -20.6 C (-5.1 F).
Coldest night (TNn) at Mtn Home by year
Year
Coldest night (TNn)
1906
-21.7 C (-7.1 F)
1907
-17.8 C (0.0 F)
1908
-21.1 C (-6.0 F)
1909
-16.1 C (3.0 F)
1910
-28.3 C (-18.9 F)
1911
-21.7 C (-7.1 F)
1912
-30.0 C (-22.0 F)
1913
-23.3 C (-9.9 F)
1914
-20.6 C (-5.1 F)
1915
-28.9 C (-20.0 F)
1916
-24.4 C (-11.9 F)
1917
-30.6 C (-23.1 F)
1918
-17.2 C (1.0 F)
1919
-29.4 C (-20.9 F)
1920
-18.9 C (-2.0 F)
1921
-20.6 C (-5.1 F)
1922
-28.3 C (-18.9 F)
1923
-21.1 C (-6.0 F)
1924
-37.8 C (-36.0 F)
1925
-18.3 C (-0.9 F)
1926
-18.9 C (-2.0 F)
1927
-22.8 C (-9.0 F)
1928
-17.8 C (0.0 F)
1929
-21.7 C (-7.1 F)
1930
-30.6 C (-23.1 F)
1931
-25.0 C (-13.0 F)
1932
-26.7 C (-16.1 F)
1933
-27.2 C (-17.0 F)
1934
-10.0 C (14.0 F)
1935
-26.1 C (-15.0 F)
1936
-27.8 C (-18.0 F)
1937
-33.9 C (-29.0 F)
1938
-13.9 C (7.0 F)
1939
-16.7 C (1.9 F)
1940
-20.6 C (-5.1 F)
1941
-16.1 C (3.0 F)
1942
-28.3 C (-18.9 F)
1943
-21.1 C (-6.0 F)
1944
-20.0 C (-4.0 F)
1945
-18.3 C (-0.9 F)
1946
-17.2 C (1.0 F)
1947
-22.2 C (-8.0 F)
1948
-22.8 C (-9.0 F)
1949
-27.8 C (-18.0 F)
1950
-25.0 C (-13.0 F)
1951
-22.2 C (-8.0 F)
1952
-18.9 C (-2.0 F)
1953
-12.8 C (9.0 F)
1954
-16.7 C (1.9 F)
1955
-23.3 C (-9.9 F)
1956
-25.6 C (-14.1 F)
1957
-21.7 C (-7.1 F)
1958
-19.4 C (-2.9 F)
1959
-20.6 C (-5.1 F)
1960
-19.4 C (-2.9 F)
1961
-17.8 C (0.0 F)
1962
-27.8 C (-18.0 F)
1963
-24.4 C (-11.9 F)
1964
-23.3 C (-9.9 F)
1965
-15.0 C (5.0 F)
1966
-17.2 C (1.0 F)
1967
-20.0 C (-4.0 F)
1968
-18.9 C (-2.0 F)
1969
-16.1 C (3.0 F)
1970
-16.7 C (1.9 F)
1971
-18.9 C (-2.0 F)
1972
-29.4 C (-20.9 F)
1973
-13.3 C (8.1 F)
1974
-21.7 C (-7.1 F)
1975
-19.4 C (-2.9 F)
1976
-16.7 C (1.9 F)
1977
-21.7 C (-7.1 F)
1978
-25.6 C (-14.1 F)
1979
-26.1 C (-15.0 F)
1980
-11.7 C (10.9 F)
1981
-16.1 C (3.0 F)
1982
-20.6 C (-5.1 F)
1983
-25.6 C (-14.1 F)
1984
-23.3 C (-9.9 F)
1985
-24.4 C (-11.9 F)
1986
-11.1 C (12.0 F)
1987
-18.9 C (-2.0 F)
1988
-17.8 C (0.0 F)
1989
-25.0 C (-13.0 F)
1990
-31.7 C (-25.1 F)
1991
-21.7 C (-7.1 F)
1992
-17.8 C (0.0 F)
1993
-19.4 C (-2.9 F)
1994
-15.0 C (5.0 F)
1995
-15.0 C (5.0 F)
1996
-22.2 C (-8.0 F)
1997
-15.6 C (3.9 F)
1998
-23.3 C (-9.9 F)
1999
-11.1 C (12.0 F)
2000
-12.8 C (9.0 F)
2001
-12.8 C (9.0 F)
2002
-16.7 C (1.9 F)
2003
-11.7 C (10.9 F)
2004
-16.1 C (3.0 F)
2005
-16.7 C (1.9 F)
2006
-13.9 C (7.0 F)
2007
-16.1 C (3.0 F)
Wettest day (Rx1day)
The wettest day of the year at Mtn Home, 1906 to 2007. The record is 50.0 mm (2.0 in) in 1976, marked on the chart; the median year is 20.6 mm (0.8 in).
Wettest day (Rx1day) at Mtn Home by year
Year
Wettest day (Rx1day)
1906
12.7 mm (0.5 in)
1907
20.3 mm (0.8 in)
1908
24.6 mm (1.0 in)
1909
24.9 mm (1.0 in)
1910
16.3 mm (0.6 in)
1911
19.8 mm (0.8 in)
1912
17.0 mm (0.7 in)
1913
41.9 mm (1.6 in)
1914
18.8 mm (0.7 in)
1915
33.0 mm (1.3 in)
1916
17.5 mm (0.7 in)
1917
28.2 mm (1.1 in)
1918
18.3 mm (0.7 in)
1919
19.8 mm (0.8 in)
1920
16.5 mm (0.6 in)
1921
25.9 mm (1.0 in)
1922
21.8 mm (0.9 in)
1923
31.8 mm (1.3 in)
1924
22.6 mm (0.9 in)
1925
26.2 mm (1.0 in)
1926
13.0 mm (0.5 in)
1927
19.1 mm (0.8 in)
1928
21.6 mm (0.9 in)
1929
14.0 mm (0.6 in)
1930
14.0 mm (0.6 in)
1931
23.6 mm (0.9 in)
1932
22.4 mm (0.9 in)
1933
38.1 mm (1.5 in)
1934
10.9 mm (0.4 in)
1935
31.5 mm (1.2 in)
1936
25.4 mm (1.0 in)
1937
24.9 mm (1.0 in)
1938
20.8 mm (0.8 in)
1939
17.3 mm (0.7 in)
1940
21.1 mm (0.8 in)
1941
31.2 mm (1.2 in)
1942
14.7 mm (0.6 in)
1943
36.1 mm (1.4 in)
1944
16.5 mm (0.6 in)
1945
17.0 mm (0.7 in)
1946
26.7 mm (1.1 in)
1947
13.2 mm (0.5 in)
1948
14.0 mm (0.6 in)
1949
19.8 mm (0.8 in)
1950
18.0 mm (0.7 in)
1951
17.8 mm (0.7 in)
1952
14.5 mm (0.6 in)
1953
27.7 mm (1.1 in)
1954
19.3 mm (0.8 in)
1955
22.4 mm (0.9 in)
1956
27.2 mm (1.1 in)
1957
22.1 mm (0.9 in)
1958
19.8 mm (0.8 in)
1959
11.9 mm (0.5 in)
1960
26.2 mm (1.0 in)
1961
39.4 mm (1.6 in)
1962
23.6 mm (0.9 in)
1963
25.4 mm (1.0 in)
1964
22.9 mm (0.9 in)
1965
40.6 mm (1.6 in)
1966
19.1 mm (0.8 in)
1967
20.3 mm (0.8 in)
1968
38.1 mm (1.5 in)
1969
15.2 mm (0.6 in)
1970
35.6 mm (1.4 in)
1971
15.5 mm (0.6 in)
1972
14.7 mm (0.6 in)
1973
12.7 mm (0.5 in)
1974
19.8 mm (0.8 in)
1975
25.7 mm (1.0 in)
1976
50.0 mm (2.0 in)
1977
14.0 mm (0.6 in)
1978
25.4 mm (1.0 in)
1979
20.3 mm (0.8 in)
1980
42.7 mm (1.7 in)
1981
25.4 mm (1.0 in)
1982
21.1 mm (0.8 in)
1983
24.4 mm (1.0 in)
1984
13.2 mm (0.5 in)
1985
28.7 mm (1.1 in)
1986
20.8 mm (0.8 in)
1987
10.7 mm (0.4 in)
1988
10.7 mm (0.4 in)
1989
15.0 mm (0.6 in)
1990
7.9 mm (0.31 in)
1991
29.2 mm (1.1 in)
1992
14.0 mm (0.6 in)
1993
26.4 mm (1.0 in)
1994
16.0 mm (0.6 in)
1995
26.2 mm (1.0 in)
1996
19.3 mm (0.8 in)
1997
13.2 mm (0.5 in)
1998
30.7 mm (1.2 in)
1999
12.7 mm (0.5 in)
2000
16.5 mm (0.6 in)
2001
12.7 mm (0.5 in)
2002
25.7 mm (1.0 in)
2003
19.8 mm (0.8 in)
2004
26.9 mm (1.1 in)
2005
33.8 mm (1.3 in)
2006
24.9 mm (1.0 in)
2007
19.6 mm (0.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Mtn Home, 1906 to 2007. The record is 71.9 mm (2.8 in) in 1968, marked on the chart; the median year is 33.3 mm (1.3 in).
Wettest five days (Rx5day) at Mtn Home by year
Year
Wettest five days (Rx5day)
1906
35.1 mm (1.4 in)
1907
61.7 mm (2.4 in)
1908
32.5 mm (1.3 in)
1909
62.5 mm (2.5 in)
1910
33.9 mm (1.3 in)
1911
33.4 mm (1.3 in)
1912
30.5 mm (1.2 in)
1913
48.0 mm (1.9 in)
1914
29.0 mm (1.1 in)
1915
33.0 mm (1.3 in)
1916
41.5 mm (1.6 in)
1917
30.5 mm (1.2 in)
1918
28.5 mm (1.1 in)
1919
27.4 mm (1.1 in)
1920
34.0 mm (1.3 in)
1921
36.0 mm (1.4 in)
1922
29.2 mm (1.1 in)
1923
57.4 mm (2.3 in)
1924
37.9 mm (1.5 in)
1925
47.8 mm (1.9 in)
1926
30.0 mm (1.2 in)
1927
42.4 mm (1.7 in)
1928
24.6 mm (1.0 in)
1929
19.6 mm (0.8 in)
1930
34.3 mm (1.4 in)
1931
23.6 mm (0.9 in)
1932
24.6 mm (1.0 in)
1933
40.7 mm (1.6 in)
1934
18.5 mm (0.7 in)
1935
33.5 mm (1.3 in)
1936
28.8 mm (1.1 in)
1937
38.7 mm (1.5 in)
1938
41.4 mm (1.6 in)
1939
25.7 mm (1.0 in)
1940
33.6 mm (1.3 in)
1941
41.6 mm (1.6 in)
1942
28.4 mm (1.1 in)
1943
38.6 mm (1.5 in)
1944
33.2 mm (1.3 in)
1945
34.3 mm (1.4 in)
1946
45.2 mm (1.8 in)
1947
23.7 mm (0.9 in)
1948
22.6 mm (0.9 in)
1949
19.8 mm (0.8 in)
1950
32.8 mm (1.3 in)
1951
26.9 mm (1.1 in)
1952
18.0 mm (0.7 in)
1953
52.6 mm (2.1 in)
1954
29.0 mm (1.1 in)
1955
33.1 mm (1.3 in)
1956
38.6 mm (1.5 in)
1957
32.6 mm (1.3 in)
1958
26.4 mm (1.0 in)
1959
18.3 mm (0.7 in)
1960
28.4 mm (1.1 in)
1961
41.9 mm (1.6 in)
1962
29.1 mm (1.1 in)
1963
40.1 mm (1.6 in)
1964
49.5 mm (1.9 in)
1965
61.0 mm (2.4 in)
1966
35.6 mm (1.4 in)
1967
25.1 mm (1.0 in)
1968
71.9 mm (2.8 in)
1969
29.7 mm (1.2 in)
1970
51.1 mm (2.0 in)
1971
28.2 mm (1.1 in)
1972
39.8 mm (1.6 in)
1973
29.2 mm (1.1 in)
1974
34.9 mm (1.4 in)
1975
37.4 mm (1.5 in)
1976
58.1 mm (2.3 in)
1977
43.5 mm (1.7 in)
1978
27.6 mm (1.1 in)
1979
43.9 mm (1.7 in)
1980
56.9 mm (2.2 in)
1981
35.1 mm (1.4 in)
1982
40.9 mm (1.6 in)
1983
31.5 mm (1.2 in)
1984
33.0 mm (1.3 in)
1985
39.2 mm (1.5 in)
1986
51.2 mm (2.0 in)
1987
23.4 mm (0.9 in)
1988
21.6 mm (0.9 in)
1989
25.2 mm (1.0 in)
1990
16.8 mm (0.7 in)
1991
39.3 mm (1.5 in)
1992
19.8 mm (0.8 in)
1993
53.4 mm (2.1 in)
1994
22.1 mm (0.9 in)
1995
34.8 mm (1.4 in)
1996
43.5 mm (1.7 in)
1997
32.3 mm (1.3 in)
1998
42.9 mm (1.7 in)
1999
23.7 mm (0.9 in)
2000
23.1 mm (0.9 in)
2001
16.5 mm (0.6 in)
2002
20.6 mm (0.8 in)
2003
28.3 mm (1.1 in)
2004
36.8 mm (1.4 in)
2005
56.7 mm (2.2 in)
2006
53.1 mm (2.1 in)
2007
23.7 mm (0.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Mtn Home, 1906 to 2007. The record is 146 days in 1999, marked on the chart; the median year is 55 days.
Longest dry spell (CDD) at Mtn Home by year
Year
Longest dry spell (CDD)
1906
44 days
1907
57 days
1908
31 days
1909
37 days
1910
133 days
1911
67 days
1912
36 days
1913
45 days
1914
42 days
1915
49 days
1916
45 days
1917
70 days
1918
34 days
1919
43 days
1920
55 days
1921
77 days
1922
42 days
1923
70 days
1924
43 days
1925
34 days
1926
52 days
1927
38 days
1928
103 days
1929
60 days
1930
38 days
1931
43 days
1932
40 days
1933
77 days
1934
106 days
1935
133 days
1936
90 days
1937
68 days
1938
39 days
1939
55 days
1940
91 days
1941
35 days
1942
117 days
1943
94 days
1944
79 days
1945
60 days
1946
36 days
1947
118 days
1948
55 days
1949
62 days
1950
32 days
1951
88 days
1952
84 days
1953
65 days
1954
54 days
1955
90 days
1956
70 days
1957
101 days
1958
62 days
1959
73 days
1960
71 days
1961
47 days
1962
38 days
1963
88 days
1964
59 days
1965
61 days
1966
44 days
1967
54 days
1968
65 days
1969
74 days
1970
24 days
1971
69 days
1972
46 days
1973
41 days
1974
61 days
1975
43 days
1976
67 days
1977
46 days
1978
71 days
1979
52 days
1980
68 days
1981
48 days
1982
53 days
1983
36 days
1984
29 days
1985
58 days
1986
29 days
1987
80 days
1988
89 days
1989
37 days
1990
35 days
1991
57 days
1992
94 days
1993
51 days
1994
46 days
1995
64 days
1996
46 days
1997
53 days
1998
38 days
1999
146 days
2000
111 days
2001
48 days
2002
59 days
2003
79 days
2004
45 days
2005
38 days
2006
68 days
2007
35 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
83 years with a frost
Across 83 years with a frost, the median last spring frost at Mtn Home falls on 19 May and the median first autumn frost on 21 September, which leaves a median of 124 days between them.
In 1970 to 2006 the median growing season was 138 days. That is 32 days more than in 1907 to 1941.
Fitted over all years, the growing season changes by +5.9 days per decade at this station.
Frost dates and growing season at Mtn Home
Measure
Median, all years
Earliest period (1907 to 1941)
Recent period (1970 to 2006)
Recent against earliest
Fitted trend
Last spring frost
19 May
26 May
9 May
17 days earlier
-2.8 days per decade
First autumn frost
21 September
10 September
28 September
18 days later
+3.1 days per decade
Growing days
124 days
106 days
138 days
32 days more
+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
89 years, 1907 to 2006
A day with at least 20.8 mm (0.8 in) of rain is expected about once in 2 years. A day with at least 46.9 mm (1.8 in) of rain is expected about once in 100 years.
Rainfall return levels at Mtn Home: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
20.8 mm (0.8 in)
5 years
28.0 mm (1.1 in)
10 years
32.7 mm (1.3 in)
25 years
38.5 mm (1.5 in)
50 years
42.7 mm (1.7 in)
100 years
46.9 mm (1.8 in)
Longer than the 89 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, 89 years of values from 1907 to 2006.
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: 50.0 mm (2.0 in) in 1976; 41.9 mm (1.6 in) in 1913; 40.6 mm (1.6 in) in 1965.
Download the Data
Data for Mtn Home standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mtn Home 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.