Record envelope, standing records and threshold days for Ballantine (USC00240432), Montana, United States, with 93 years of record.
Key Facts for Ballantine
Ballantine (USC00240432) is a weather station in Montana, United States at 45.95 latitude and -108.14 longitude, 914 m (3,000 ft) above sea level.
The station reports from 1919 to 2011, 93 years of record.
1,464 records set at Ballantine still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Ballantine tied a daily record high minimum temperature of 15.6 C (60.1 F) on 28 August 2011.
About the Station
Location: Montana, United States, 45.95 latitude, -108.14 longitude.
Elevation: 914 m (3,000 ft).
Period of record: 1919 to 2011, 93 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 Ballantine. 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 Ballantine, 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)
-40.6 C (-41.1 F)
n/a
n/a
Feb
25.0 C (77.0 F)
-45.6 C (-50.1 F)
n/a
n/a
Mar
30.0 C (86.0 F)
-37.2 C (-35.0 F)
n/a
n/a
Apr
34.4 C (93.9 F)
-23.3 C (-9.9 F)
n/a
n/a
May
40.0 C (104.0 F)
-11.1 C (12.0 F)
n/a
n/a
Jun
41.7 C (107.1 F)
-1.1 C (30.0 F)
n/a
n/a
Jul
43.3 C (109.9 F)
2.8 C (37.0 F)
n/a
n/a
Aug
42.2 C (108.0 F)
1.7 C (35.1 F)
n/a
n/a
Sep
40.0 C (104.0 F)
-7.2 C (19.0 F)
n/a
n/a
Oct
33.9 C (93.0 F)
-25.0 C (-13.0 F)
n/a
n/a
Nov
25.0 C (77.0 F)
-35.0 C (-31.0 F)
n/a
n/a
Dec
21.1 C (70.0 F)
-42.2 C (-44.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Ballantine still stand. 1936 holds the most, with 62.
Standing records at Ballantine by the year they were set
Year set
Standing records
1919
26
1920
13
1921
26
1922
19
1923
18
1924
23
1925
23
1926
24
1927
17
1928
15
1929
18
1930
27
1931
32
1932
27
1933
25
1934
34
1935
23
1936
62
1937
12
1938
14
1939
25
1940
21
1941
9
1942
16
1943
34
1944
17
1945
13
1946
6
1947
13
1948
18
1949
22
1950
32
1951
25
1952
11
1953
16
1954
25
1955
16
1956
11
1957
11
1958
13
1959
19
1960
13
1961
11
1962
16
1963
14
1964
4
1965
29
1966
10
1967
11
1968
15
1969
17
1970
6
1971
16
1972
21
1973
12
1974
10
1975
8
1976
8
1977
15
1978
13
1979
11
1980
24
1981
16
1982
14
1983
19
1984
10
1985
34
1986
21
1987
21
1988
18
1989
25
1990
18
1999
1
2000
9
2001
12
2002
22
2003
18
2004
14
2005
20
2006
10
2007
11
2008
4
2009
1
2010
6
2011
5
All-Time Record Progression
3 new records
3 all-time records were set at Ballantine between 3 July 1949 and 25 December 1983. Each dot is a new record.
When Ballantine set new all-time records
Date
Kind
Detail
1949-07-03
Record high minimum temperature
Record high minimum temperature 22.2 C (72.0 F)
1968-06-09
Record daily precipitation
Record daily precipitation 80.0 mm (3.1 in)
1983-12-25
Record low maximum temperature
Record low maximum temperature -28.9 C (-20.0 F)
Wettest Day of Each Month
Jun: 80.0 mm (3.1 in)
The wettest day on record for each calendar month at Ballantine. The most was 80.0 mm (3.1 in) on 9 June 1968.
Record daily precipitation for each month at Ballantine
Month
Record daily precipitation (mm)
Date
Jan
19.8 mm (0.8 in)
13 January 1928
Feb
33.0 mm (1.3 in)
25 February 2000
Mar
35.6 mm (1.4 in)
30 March 2006
Apr
37.6 mm (1.5 in)
25 April 1964
May
54.4 mm (2.1 in)
18 May 1978
Jun
80.0 mm (3.1 in)
9 June 1968
Jul
32.3 mm (1.3 in)
26 July 1968
Aug
39.4 mm (1.6 in)
30 August 1967
Sep
73.2 mm (2.9 in)
7 September 1941
Oct
43.7 mm (1.7 in)
31 October 1974
Nov
33.0 mm (1.3 in)
4 November 1968
Dec
14.7 mm (0.6 in)
20 December 1944
Period of Record Coverage
1919 to 2011
Complete yearUnder 90 percent of days
85 years of record at Ballantine, 1919 to 2011. 11 years have data for under 90 percent of days and are left out of rankings: 1919, 1928, 1960, 1961, 1964, 1999, 2007, 2008 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 73 complete years at Ballantine, 1920 to 2006. Blue stripes are years cooler than the station's own mean of 8.2 C (46.8 F); red stripes are warmer. The coolest year was 1951, at 6.2 C (43.2 F), and the warmest was 1934, at 10.3 C (50.5 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Ballantine as warming stripes, 1920 to 2006
Year
Annual mean temperature
Difference from the station mean
1920
7.3 C
-0.92 C
1921
8.7 C
+0.48 C
1922
6.6 C
-1.68 C
1923
8.7 C
+0.47 C
1924
7.5 C
-0.78 C
1925
9.0 C
+0.72 C
1926
9.6 C
+1.41 C
1927
7.0 C
-1.26 C
1929
6.4 C
-1.84 C
1930
8.8 C
+0.61 C
1931
9.3 C
+1.07 C
1932
7.3 C
-0.92 C
1933
8.5 C
+0.29 C
1934
10.3 C
+2.02 C
1935
8.1 C
-0.16 C
1936
8.1 C
-0.14 C
1937
7.3 C
-0.95 C
1938
9.0 C
+0.73 C
1939
9.3 C
+1.05 C
1940
9.2 C
+0.96 C
1941
9.3 C
+1.10 C
1942
8.7 C
+0.42 C
1943
8.7 C
+0.42 C
1944
8.5 C
+0.27 C
1946
9.2 C
+0.98 C
1947
8.3 C
+0.08 C
1948
8.8 C
+0.52 C
1949
7.7 C
-0.49 C
1950
6.4 C
-1.82 C
1951
6.2 C
-2.03 C
1952
8.5 C
+0.29 C
1953
10.1 C
+1.82 C
1954
8.7 C
+0.50 C
1955
7.3 C
-0.96 C
1956
8.4 C
+0.15 C
1957
7.8 C
-0.39 C
1958
9.0 C
+0.81 C
1959
7.6 C
-0.61 C
1960
8.8 C
+0.58 C
1962
8.1 C
-0.11 C
1963
8.9 C
+0.71 C
1965
6.9 C
-1.33 C
1966
7.7 C
-0.53 C
1967
8.2 C
+0.00 C
1968
7.2 C
-1.02 C
1969
7.0 C
-1.19 C
1970
8.1 C
-0.11 C
1971
8.1 C
-0.15 C
1972
7.8 C
-0.47 C
1973
8.3 C
+0.06 C
1974
8.5 C
+0.27 C
1975
6.5 C
-1.69 C
1976
8.5 C
+0.22 C
1977
9.0 C
+0.80 C
1978
6.8 C
-1.48 C
1979
8.1 C
-0.10 C
1980
9.3 C
+1.04 C
1981
9.4 C
+1.18 C
1982
6.6 C
-1.59 C
1983
8.1 C
-0.11 C
1984
8.1 C
-0.10 C
1985
6.4 C
-1.81 C
1986
8.6 C
+0.36 C
1987
9.5 C
+1.22 C
1988
9.6 C
+1.40 C
1989
7.2 C
-1.03 C
1990
8.5 C
+0.25 C
2000
8.1 C
-0.18 C
2001
8.7 C
+0.44 C
2002
8.2 C
-0.01 C
2003
8.9 C
+0.66 C
2004
8.6 C
+0.37 C
2006
9.4 C
+1.15 C
The fitted trend in annual mean temperature here over 1920 to 2006 is 0.01 C (-0.09 to 0.10) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.01 F (-0.15 to 0.18) per decade. The slope is a straight line fitted to 73 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Ballantine
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.01 C (-0.09 to 0.10) per decade
0.01 F (-0.15 to 0.18) per decade
1920 to 2006
73
Not clearly different from zero
Mean daily maximum
-0.02 C (-0.13 to 0.10) per decade
-0.03 F (-0.24 to 0.18) per decade
1920 to 2006
73
Not clearly different from zero
Mean daily minimum
0.03 C (-0.06 to 0.13) per decade
0.1 F (-0.1 to 0.2) per decade
1920 to 2006
73
Not clearly different from zero
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
1919 to 2011
Yearly extremes at Ballantine: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
43.3 C (109.9 F)
1933
39.4 C (102.9 F)
85
Coldest night (TNn)
-45.6 C (-50.1 F)
1936
-33.3 C (-27.9 F)
85
Wettest day (Rx1day)
80.0 mm (3.1 in)
1968
27.7 mm (1.1 in)
85
Wettest five days (Rx5day)
122.7 mm (4.8 in)
1969
46.3 mm (1.8 in)
85
Longest dry spell (CDD)
82 days
1964
31 days
85
Hottest day (TXx)
The hottest day of the year at Ballantine, 1919 to 2011. The record is 43.3 C (109.9 F) in 1933, marked on the chart; the median year is 39.4 C (102.9 F).
Hottest day (TXx) at Ballantine by year
Year
Hottest day (TXx)
1919
41.7 C (107.1 F)
1920
37.2 C (99.0 F)
1921
42.8 C (109.0 F)
1922
37.8 C (100.0 F)
1923
40.6 C (105.1 F)
1924
39.4 C (102.9 F)
1925
39.4 C (102.9 F)
1926
40.0 C (104.0 F)
1927
37.8 C (100.0 F)
1928
37.8 C (100.0 F)
1929
38.9 C (102.0 F)
1930
40.0 C (104.0 F)
1931
41.1 C (106.0 F)
1932
38.9 C (102.0 F)
1933
43.3 C (109.9 F)
1934
41.7 C (107.1 F)
1935
40.6 C (105.1 F)
1936
43.3 C (109.9 F)
1937
38.9 C (102.0 F)
1938
35.0 C (95.0 F)
1939
38.3 C (100.9 F)
1940
39.4 C (102.9 F)
1941
37.8 C (100.0 F)
1942
36.7 C (98.1 F)
1943
37.8 C (100.0 F)
1944
33.3 C (91.9 F)
1945
38.3 C (100.9 F)
1946
38.9 C (102.0 F)
1947
41.1 C (106.0 F)
1948
39.4 C (102.9 F)
1949
41.1 C (106.0 F)
1950
37.8 C (100.0 F)
1951
40.0 C (104.0 F)
1952
38.9 C (102.0 F)
1953
40.6 C (105.1 F)
1954
40.0 C (104.0 F)
1955
40.6 C (105.1 F)
1956
41.1 C (106.0 F)
1957
40.0 C (104.0 F)
1958
38.9 C (102.0 F)
1959
38.9 C (102.0 F)
1960
42.8 C (109.0 F)
1961
42.2 C (108.0 F)
1962
37.8 C (100.0 F)
1963
39.4 C (102.9 F)
1964
40.0 C (104.0 F)
1965
37.8 C (100.0 F)
1966
40.6 C (105.1 F)
1967
37.2 C (99.0 F)
1968
35.0 C (95.0 F)
1969
38.9 C (102.0 F)
1970
39.4 C (102.9 F)
1971
41.1 C (106.0 F)
1972
37.2 C (99.0 F)
1973
39.4 C (102.9 F)
1974
38.3 C (100.9 F)
1975
40.6 C (105.1 F)
1976
41.1 C (106.0 F)
1977
39.4 C (102.9 F)
1978
37.8 C (100.0 F)
1979
39.4 C (102.9 F)
1980
39.4 C (102.9 F)
1981
40.0 C (104.0 F)
1982
38.3 C (100.9 F)
1983
40.6 C (105.1 F)
1984
40.6 C (105.1 F)
1985
40.6 C (105.1 F)
1986
38.3 C (100.9 F)
1987
38.3 C (100.9 F)
1988
41.1 C (106.0 F)
1989
41.1 C (106.0 F)
1990
39.4 C (102.9 F)
1999
15.6 C (60.1 F)
2000
38.9 C (102.0 F)
2001
39.4 C (102.9 F)
2002
42.2 C (108.0 F)
2003
41.1 C (106.0 F)
2004
37.8 C (100.0 F)
2005
42.2 C (108.0 F)
2006
37.8 C (100.0 F)
2007
40.0 C (104.0 F)
2008
21.7 C (71.1 F)
2009
20.6 C (69.1 F)
2010
38.9 C (102.0 F)
2011
37.8 C (100.0 F)
Coldest night (TNn)
The coldest night of the year at Ballantine, 1919 to 2011. The record is -45.6 C (-50.1 F) in 1936, marked on the chart; the median year is -33.3 C (-27.9 F).
Coldest night (TNn) at Ballantine by year
Year
Coldest night (TNn)
1919
-40.6 C (-41.1 F)
1920
-34.4 C (-29.9 F)
1921
-32.2 C (-26.0 F)
1922
-36.7 C (-34.1 F)
1923
-39.4 C (-38.9 F)
1924
-37.2 C (-35.0 F)
1925
-25.6 C (-14.1 F)
1926
-26.1 C (-15.0 F)
1927
-40.6 C (-41.1 F)
1928
-36.1 C (-33.0 F)
1929
-38.3 C (-36.9 F)
1930
-40.0 C (-40.0 F)
1931
-24.4 C (-11.9 F)
1932
-37.2 C (-35.0 F)
1933
-41.7 C (-43.1 F)
1934
-28.3 C (-18.9 F)
1935
-33.3 C (-27.9 F)
1936
-45.6 C (-50.1 F)
1937
-40.6 C (-41.1 F)
1938
-33.9 C (-29.0 F)
1939
-34.4 C (-29.9 F)
1940
-37.2 C (-35.0 F)
1941
-26.1 C (-15.0 F)
1942
-35.0 C (-31.0 F)
1943
-33.3 C (-27.9 F)
1944
-30.6 C (-23.1 F)
1945
-29.4 C (-20.9 F)
1946
-31.1 C (-24.0 F)
1947
-33.3 C (-27.9 F)
1948
-30.0 C (-22.0 F)
1949
-38.9 C (-38.0 F)
1950
-35.0 C (-31.0 F)
1951
-32.8 C (-27.0 F)
1952
-33.9 C (-29.0 F)
1953
-21.1 C (-6.0 F)
1954
-39.4 C (-38.9 F)
1955
-33.3 C (-27.9 F)
1956
-36.1 C (-33.0 F)
1957
-38.9 C (-38.0 F)
1958
-23.3 C (-9.9 F)
1959
-35.0 C (-31.0 F)
1960
-28.9 C (-20.0 F)
1961
-30.6 C (-23.1 F)
1962
-36.7 C (-34.1 F)
1963
-36.7 C (-34.1 F)
1964
-37.8 C (-36.0 F)
1965
-33.9 C (-29.0 F)
1966
-32.8 C (-27.0 F)
1967
-31.7 C (-25.1 F)
1968
-34.4 C (-29.9 F)
1969
-37.8 C (-36.0 F)
1970
-27.8 C (-18.0 F)
1971
-30.6 C (-23.1 F)
1972
-33.9 C (-29.0 F)
1973
-31.1 C (-24.0 F)
1974
-32.8 C (-27.0 F)
1975
-30.0 C (-22.0 F)
1976
-27.8 C (-18.0 F)
1977
-30.6 C (-23.1 F)
1978
-33.3 C (-27.9 F)
1979
-34.4 C (-29.9 F)
1980
-33.3 C (-27.9 F)
1981
-31.1 C (-24.0 F)
1982
-35.6 C (-32.1 F)
1983
-42.2 C (-44.0 F)
1984
-28.3 C (-18.9 F)
1985
-33.9 C (-29.0 F)
1986
-29.4 C (-20.9 F)
1987
-21.7 C (-7.1 F)
1988
-28.9 C (-20.0 F)
1989
-41.7 C (-43.1 F)
1990
-36.7 C (-34.1 F)
1999
-12.8 C (9.0 F)
2000
-27.8 C (-18.0 F)
2001
-25.6 C (-14.1 F)
2002
-23.3 C (-9.9 F)
2003
-28.9 C (-20.0 F)
2004
-31.1 C (-24.0 F)
2005
-35.0 C (-31.0 F)
2006
-27.2 C (-17.0 F)
2007
-26.7 C (-16.1 F)
2008
-29.4 C (-20.9 F)
2009
-25.6 C (-14.1 F)
2010
-24.4 C (-11.9 F)
2011
-30.6 C (-23.1 F)
Wettest day (Rx1day)
The wettest day of the year at Ballantine, 1919 to 2011. The record is 80.0 mm (3.1 in) in 1968, marked on the chart; the median year is 27.7 mm (1.1 in).
Wettest day (Rx1day) at Ballantine by year
Year
Wettest day (Rx1day)
1919
71.1 mm (2.8 in)
1920
27.4 mm (1.1 in)
1921
29.2 mm (1.1 in)
1922
59.2 mm (2.3 in)
1923
31.0 mm (1.2 in)
1924
22.4 mm (0.9 in)
1925
23.9 mm (0.9 in)
1926
25.9 mm (1.0 in)
1927
24.9 mm (1.0 in)
1928
19.8 mm (0.8 in)
1929
14.5 mm (0.6 in)
1930
23.6 mm (0.9 in)
1931
11.4 mm (0.4 in)
1932
25.1 mm (1.0 in)
1933
36.3 mm (1.4 in)
1934
25.4 mm (1.0 in)
1935
28.4 mm (1.1 in)
1936
16.8 mm (0.7 in)
1937
42.2 mm (1.7 in)
1938
40.9 mm (1.6 in)
1939
31.8 mm (1.3 in)
1940
31.5 mm (1.2 in)
1941
73.2 mm (2.9 in)
1942
45.7 mm (1.8 in)
1943
47.8 mm (1.9 in)
1944
30.2 mm (1.2 in)
1945
12.4 mm (0.5 in)
1946
25.7 mm (1.0 in)
1947
42.4 mm (1.7 in)
1948
21.8 mm (0.9 in)
1949
25.7 mm (1.0 in)
1950
19.1 mm (0.8 in)
1951
33.8 mm (1.3 in)
1952
26.2 mm (1.0 in)
1953
18.3 mm (0.7 in)
1954
15.7 mm (0.6 in)
1955
23.6 mm (0.9 in)
1956
15.5 mm (0.6 in)
1957
29.0 mm (1.1 in)
1958
21.3 mm (0.8 in)
1959
26.7 mm (1.1 in)
1960
28.7 mm (1.1 in)
1961
66.0 mm (2.6 in)
1962
37.6 mm (1.5 in)
1963
34.0 mm (1.3 in)
1964
40.4 mm (1.6 in)
1965
19.1 mm (0.8 in)
1966
62.7 mm (2.5 in)
1967
43.2 mm (1.7 in)
1968
80.0 mm (3.1 in)
1969
62.2 mm (2.4 in)
1970
29.5 mm (1.2 in)
1971
36.8 mm (1.4 in)
1972
27.7 mm (1.1 in)
1973
24.9 mm (1.0 in)
1974
43.7 mm (1.7 in)
1975
25.9 mm (1.0 in)
1976
24.4 mm (1.0 in)
1977
23.4 mm (0.9 in)
1978
54.4 mm (2.1 in)
1979
10.7 mm (0.4 in)
1980
31.5 mm (1.2 in)
1981
41.9 mm (1.6 in)
1982
36.6 mm (1.4 in)
1983
24.1 mm (0.9 in)
1984
26.9 mm (1.1 in)
1985
25.4 mm (1.0 in)
1986
18.3 mm (0.7 in)
1987
27.9 mm (1.1 in)
1988
25.4 mm (1.0 in)
1989
31.8 mm (1.3 in)
1990
15.2 mm (0.6 in)
1999
4.6 mm (0.18 in)
2000
33.0 mm (1.3 in)
2001
24.9 mm (1.0 in)
2002
13.2 mm (0.5 in)
2003
35.6 mm (1.4 in)
2004
47.0 mm (1.9 in)
2005
35.1 mm (1.4 in)
2006
35.6 mm (1.4 in)
2007
33.8 mm (1.3 in)
2008
11.4 mm (0.4 in)
2009
12.7 mm (0.5 in)
2010
33.0 mm (1.3 in)
2011
25.4 mm (1.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Ballantine, 1919 to 2011. The record is 122.7 mm (4.8 in) in 1969, marked on the chart; the median year is 46.3 mm (1.8 in).
Wettest five days (Rx5day) at Ballantine by year
Year
Wettest five days (Rx5day)
1919
73.7 mm (2.9 in)
1920
41.3 mm (1.6 in)
1921
38.3 mm (1.5 in)
1922
60.0 mm (2.4 in)
1923
52.6 mm (2.1 in)
1924
30.5 mm (1.2 in)
1925
33.8 mm (1.3 in)
1926
25.9 mm (1.0 in)
1927
66.7 mm (2.6 in)
1928
30.8 mm (1.2 in)
1929
18.6 mm (0.7 in)
1930
25.1 mm (1.0 in)
1931
15.8 mm (0.6 in)
1932
49.0 mm (1.9 in)
1933
68.3 mm (2.7 in)
1934
35.1 mm (1.4 in)
1935
32.0 mm (1.3 in)
1936
31.1 mm (1.2 in)
1937
68.8 mm (2.7 in)
1938
66.8 mm (2.6 in)
1939
49.9 mm (2.0 in)
1940
36.6 mm (1.4 in)
1941
88.2 mm (3.5 in)
1942
71.9 mm (2.8 in)
1943
65.6 mm (2.6 in)
1944
63.6 mm (2.5 in)
1945
22.0 mm (0.9 in)
1946
39.4 mm (1.6 in)
1947
62.0 mm (2.4 in)
1948
55.3 mm (2.2 in)
1949
57.5 mm (2.3 in)
1950
28.8 mm (1.1 in)
1951
49.8 mm (2.0 in)
1952
46.0 mm (1.8 in)
1953
37.2 mm (1.5 in)
1954
20.3 mm (0.8 in)
1955
40.6 mm (1.6 in)
1956
28.4 mm (1.1 in)
1957
56.0 mm (2.2 in)
1958
30.7 mm (1.2 in)
1959
40.4 mm (1.6 in)
1960
28.7 mm (1.1 in)
1961
98.2 mm (3.9 in)
1962
51.6 mm (2.0 in)
1963
40.8 mm (1.6 in)
1964
64.5 mm (2.5 in)
1965
40.9 mm (1.6 in)
1966
63.5 mm (2.5 in)
1967
61.8 mm (2.4 in)
1968
100.0 mm (3.9 in)
1969
122.7 mm (4.8 in)
1970
48.1 mm (1.9 in)
1971
59.9 mm (2.4 in)
1972
33.7 mm (1.3 in)
1973
41.1 mm (1.6 in)
1974
53.1 mm (2.1 in)
1975
64.6 mm (2.5 in)
1976
34.6 mm (1.4 in)
1977
40.7 mm (1.6 in)
1978
89.2 mm (3.5 in)
1979
26.3 mm (1.0 in)
1980
51.1 mm (2.0 in)
1981
85.8 mm (3.4 in)
1982
66.6 mm (2.6 in)
1983
42.4 mm (1.7 in)
1984
34.1 mm (1.3 in)
1985
52.4 mm (2.1 in)
1986
50.8 mm (2.0 in)
1987
53.6 mm (2.1 in)
1988
26.5 mm (1.0 in)
1989
73.2 mm (2.9 in)
1990
25.1 mm (1.0 in)
1999
4.6 mm (0.18 in)
2000
43.2 mm (1.7 in)
2001
34.2 mm (1.3 in)
2002
26.8 mm (1.1 in)
2003
47.6 mm (1.9 in)
2004
50.6 mm (2.0 in)
2005
69.8 mm (2.7 in)
2006
46.3 mm (1.8 in)
2007
63.5 mm (2.5 in)
2008
11.4 mm (0.4 in)
2009
12.7 mm (0.5 in)
2010
0.0 mm (0.00 in)
2011
48.7 mm (1.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Ballantine, 1919 to 2011. The record is 82 days in 1964, marked on the chart; the median year is 31 days.
Longest dry spell (CDD) at Ballantine by year
Year
Longest dry spell (CDD)
1919
25 days
1920
37 days
1921
39 days
1922
41 days
1923
79 days
1924
30 days
1925
24 days
1926
28 days
1927
28 days
1928
33 days
1929
34 days
1930
45 days
1931
32 days
1932
25 days
1933
44 days
1934
41 days
1935
24 days
1936
30 days
1937
20 days
1938
29 days
1939
47 days
1940
31 days
1941
40 days
1942
31 days
1943
36 days
1944
31 days
1945
23 days
1946
24 days
1947
33 days
1948
36 days
1949
39 days
1950
23 days
1951
30 days
1952
58 days
1953
25 days
1954
42 days
1955
33 days
1956
29 days
1957
59 days
1958
24 days
1959
56 days
1960
27 days
1961
31 days
1962
37 days
1963
41 days
1964
82 days
1965
38 days
1966
38 days
1967
33 days
1968
51 days
1969
21 days
1970
28 days
1971
31 days
1972
26 days
1973
33 days
1974
33 days
1975
26 days
1976
30 days
1977
38 days
1978
41 days
1979
27 days
1980
22 days
1981
28 days
1982
18 days
1983
24 days
1984
25 days
1985
29 days
1986
27 days
1987
40 days
1988
38 days
1989
19 days
1990
30 days
1999
13 days
2000
34 days
2001
32 days
2002
33 days
2003
62 days
2004
55 days
2005
33 days
2006
44 days
2007
54 days
2008
14 days
2009
31 days
2010
30 days
2011
5 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
73 years with a frost
Across 73 years with a frost, the median last spring frost at Ballantine falls on 14 May and the median first autumn frost on 22 September, which leaves a median of 133 days between them.
In 1967 to 2006 the median growing season was 134 days. That is 3 days more than in 1920 to 1951.
Fitted over all years, the growing season changes by +0.4 days per decade at this station.
Frost dates and growing season at Ballantine
Measure
Median, all years
Earliest period (1920 to 1951)
Recent period (1967 to 2006)
Recent against earliest
Fitted trend
Last spring frost
14 May
16 May
13 May
3 days earlier
-0.1 days per decade
First autumn frost
22 September
22 September
21 September
1 day earlier
+0.3 days per decade
Growing days
133 days
131 days
134 days
3 days more
+0.4 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
77 years, 1920 to 2005
A day with at least 28.2 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 82.1 mm (3.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Ballantine: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
28.2 mm (1.1 in)
5 years
40.2 mm (1.6 in)
10 years
49.0 mm (1.9 in)
25 years
61.3 mm (2.4 in)
50 years
71.3 mm (2.8 in)
100 years
82.1 mm (3.2 in)
Longer than the 77 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, 77 years of values from 1920 to 2005.
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: 80.0 mm (3.1 in) in 1968; 73.2 mm (2.9 in) in 1941; 66.0 mm (2.6 in) in 1961.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Ballantine, at 1962. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1962 ran 0.3 C (0.5 F) lower than in the years before (possible change).
Suspected changes in the annual mean temperature at Ballantine, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1962
-0.3
-0.5
possible
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 Ballantine standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ballantine 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.