Record envelope, standing records and threshold days for Hartline (USC00453529), Washington, United States, with 94 years of record.
Key Facts for Hartline
Hartline (USC00453529) is a weather station in Washington, United States at 47.69 latitude and -119.11 longitude, 581 m (1,906 ft) above sea level.
The station reports from 1927 to 2020, 94 years of record.
1,464 records set at Hartline still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Hartline set a daily record low maximum temperature of 15.6 C (60.1 F) on 15 June 2020.
About the Station
Location: Washington, United States, 47.69 latitude, -119.11 longitude.
Elevation: 581 m (1,906 ft).
Period of record: 1927 to 2020, 94 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 Hartline. 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 Hartline, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
12.2 C (54.0 F)
-28.3 C (-18.9 F)
n/a
n/a
Feb
16.7 C (62.1 F)
-28.9 C (-20.0 F)
n/a
n/a
Mar
22.8 C (73.0 F)
-16.7 C (1.9 F)
n/a
n/a
Apr
33.9 C (93.0 F)
-10.0 C (14.0 F)
n/a
n/a
May
37.8 C (100.0 F)
-4.4 C (24.1 F)
n/a
n/a
Jun
41.7 C (107.1 F)
-2.2 C (28.0 F)
n/a
n/a
Jul
43.3 C (109.9 F)
0.0 C (32.0 F)
n/a
n/a
Aug
43.3 C (109.9 F)
-0.6 C (30.9 F)
n/a
n/a
Sep
38.3 C (100.9 F)
-3.3 C (26.1 F)
n/a
n/a
Oct
30.0 C (86.0 F)
-15.6 C (3.9 F)
n/a
n/a
Nov
19.4 C (66.9 F)
-22.2 C (-8.0 F)
n/a
n/a
Dec
13.3 C (55.9 F)
-28.3 C (-18.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Hartline still stand. 1936 holds the most, with 44.
Standing records at Hartline by the year they were set
Year set
Standing records
1929
8
1930
15
1931
8
1932
19
1933
25
1934
24
1935
29
1936
44
1937
25
1938
23
1939
27
1940
16
1941
24
1942
12
1943
28
1944
17
1945
18
1946
11
1947
18
1948
16
1949
21
1950
23
1951
4
1952
1
1953
13
1954
11
1955
28
1956
18
1957
20
1958
24
1959
25
1960
27
1961
25
1962
18
1963
5
1964
9
1965
22
1966
10
1967
21
1968
28
1969
15
1970
15
1971
19
1972
33
1973
11
1974
22
1975
17
1976
10
1977
26
1978
8
1979
11
1980
17
1981
24
1982
9
1983
23
1984
22
1985
36
1986
21
1987
24
1988
15
1989
12
1990
12
1991
11
1992
32
1993
19
1994
10
1995
6
1996
11
1997
4
1998
15
1999
22
2000
8
2001
6
2002
16
2003
13
2004
8
2005
4
2012
2
2013
12
2014
15
2015
25
2016
11
2017
4
2018
7
2019
30
2020
11
All-Time Record Progression
2 new records
2 all-time records were set at Hartline between 17 December 1964 and 3 September 1979. Each dot is a new record.
When Hartline set new all-time records
Date
Kind
Detail
1964-12-17
Record low maximum temperature
Record low maximum temperature -22.8 C (-9.0 F)
1979-09-03
Record daily precipitation
Record daily precipitation 46.0 mm (1.8 in)
Wettest Day of Each Month
Sep: 46.0 mm (1.8 in)
The wettest day on record for each calendar month at Hartline. The most was 46.0 mm (1.8 in) on 3 September 1979.
Record daily precipitation for each month at Hartline
Month
Record daily precipitation (mm)
Date
Jan
38.1 mm (1.5 in)
26 January 2005
Feb
43.2 mm (1.7 in)
27 February 1999
Mar
24.1 mm (0.9 in)
22 March 2016
Apr
21.6 mm (0.9 in)
12 April 1986
May
45.7 mm (1.8 in)
29 May 1948
Jun
45.2 mm (1.8 in)
8 June 1987
Jul
35.6 mm (1.4 in)
13 July 1975
Aug
27.4 mm (1.1 in)
2 August 1996
Sep
46.0 mm (1.8 in)
3 September 1979
Oct
19.8 mm (0.8 in)
31 October 1994
Nov
29.2 mm (1.1 in)
26 November 1944
Dec
27.9 mm (1.1 in)
7 December 2015
Period of Record Coverage
1929 to 2020
Complete yearUnder 90 percent of days
86 years of record at Hartline, 1929 to 2020. 35 years have data for under 90 percent of days and are left out of rankings: 1929, 1931, 1934, 1935, 1947, 1949, 1950, 1951 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 50 complete years at Hartline, 1930 to 2019. Blue stripes are years cooler than the station's own mean of 9.1 C (48.4 F); red stripes are warmer. The coolest year was 1985, at 7.2 C (44.9 F), and the warmest was 1958, at 10.9 C (51.6 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Hartline as warming stripes, 1930 to 2019
Year
Annual mean temperature
Difference from the station mean
1930
8.6 C
-0.53 C
1932
8.0 C
-1.09 C
1933
8.3 C
-0.88 C
1936
8.7 C
-0.42 C
1937
8.3 C
-0.81 C
1938
10.2 C
+1.04 C
1939
9.7 C
+0.55 C
1940
9.8 C
+0.65 C
1941
9.8 C
+0.66 C
1942
9.2 C
+0.04 C
1943
8.5 C
-0.65 C
1944
9.5 C
+0.37 C
1945
9.3 C
+0.16 C
1946
9.0 C
-0.11 C
1948
7.7 C
-1.47 C
1953
9.8 C
+0.66 C
1956
8.8 C
-0.33 C
1957
8.5 C
-0.60 C
1958
10.9 C
+1.75 C
1959
8.5 C
-0.61 C
1960
9.1 C
+0.00 C
1961
9.6 C
+0.46 C
1967
10.2 C
+1.05 C
1968
9.5 C
+0.40 C
1969
8.5 C
-0.64 C
1970
9.1 C
-0.05 C
1971
8.5 C
-0.68 C
1972
8.6 C
-0.57 C
1974
9.7 C
+0.59 C
1975
8.5 C
-0.59 C
1976
8.9 C
-0.19 C
1977
9.5 C
+0.36 C
1978
9.0 C
-0.09 C
1979
9.6 C
+0.49 C
1980
9.2 C
+0.09 C
1981
9.9 C
+0.75 C
1983
9.6 C
+0.48 C
1984
8.0 C
-1.09 C
1985
7.2 C
-1.98 C
1986
9.8 C
+0.66 C
1987
10.6 C
+1.49 C
1988
9.8 C
+0.62 C
1990
10.0 C
+0.88 C
1991
10.2 C
+1.03 C
1993
8.7 C
-0.45 C
1996
8.4 C
-0.72 C
2000
8.6 C
-0.55 C
2014
10.2 C
+1.08 C
2017
8.5 C
-0.64 C
2019
8.5 C
-0.61 C
The fitted trend in annual mean temperature here over 1930 to 2019 is 0.03 C (-0.07 to 0.12) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.05 F (-0.13 to 0.22) per decade. The slope is a straight line fitted to 50 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Hartline
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.03 C (-0.07 to 0.12) per decade
0.05 F (-0.13 to 0.22) per decade
1930 to 2019
50
Not clearly different from zero
Mean daily maximum
0.03 C (-0.08 to 0.15) per decade
0.1 F (-0.1 to 0.3) per decade
1930 to 2019
50
Not clearly different from zero
Mean daily minimum
0.02 C (-0.08 to 0.12) per decade
0.03 F (-0.15 to 0.21) per decade
1930 to 2019
50
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
1927 to 2020
Yearly extremes at Hartline: 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)
1960
38.9 C (102.0 F)
86
Coldest night (TNn)
-28.9 C (-20.0 F)
1933
-19.4 C (-2.9 F)
86
Wettest day (Rx1day)
46.0 mm (1.8 in)
1979
20.6 mm (0.8 in)
88
Wettest five days (Rx5day)
70.7 mm (2.8 in)
1992
31.4 mm (1.2 in)
88
Longest dry spell (CDD)
101 days
1932
44 days
88
Hottest day (TXx)
The hottest day of the year at Hartline, 1927 to 2020. The record is 43.3 C (109.9 F) in 1960, marked on the chart; the median year is 38.9 C (102.0 F).
Hottest day (TXx) at Hartline by year
Year
Hottest day (TXx)
1927
n/a
1928
n/a
1929
40.6 C (105.1 F)
1930
38.9 C (102.0 F)
1931
36.7 C (98.1 F)
1932
37.8 C (100.0 F)
1933
40.6 C (105.1 F)
1934
38.9 C (102.0 F)
1935
38.9 C (102.0 F)
1936
39.4 C (102.9 F)
1937
38.9 C (102.0 F)
1938
41.1 C (106.0 F)
1939
42.2 C (108.0 F)
1940
39.4 C (102.9 F)
1941
41.1 C (106.0 F)
1942
38.9 C (102.0 F)
1943
36.1 C (97.0 F)
1944
37.8 C (100.0 F)
1945
37.8 C (100.0 F)
1946
39.4 C (102.9 F)
1947
37.8 C (100.0 F)
1948
35.0 C (95.0 F)
1949
37.2 C (99.0 F)
1950
37.8 C (100.0 F)
1951
31.1 C (88.0 F)
1952
27.8 C (82.0 F)
1953
37.8 C (100.0 F)
1954
35.6 C (96.1 F)
1955
40.0 C (104.0 F)
1956
38.9 C (102.0 F)
1957
35.6 C (96.1 F)
1958
40.0 C (104.0 F)
1959
40.0 C (104.0 F)
1960
43.3 C (109.9 F)
1961
43.3 C (109.9 F)
1962
38.9 C (102.0 F)
1963
30.6 C (87.1 F)
1964
29.4 C (84.9 F)
1965
39.4 C (102.9 F)
1966
35.0 C (95.0 F)
1967
40.0 C (104.0 F)
1968
40.6 C (105.1 F)
1969
37.8 C (100.0 F)
1970
39.4 C (102.9 F)
1971
41.1 C (106.0 F)
1972
40.0 C (104.0 F)
1973
39.4 C (102.9 F)
1974
37.8 C (100.0 F)
1975
41.7 C (107.1 F)
1976
37.2 C (99.0 F)
1977
40.0 C (104.0 F)
1978
38.9 C (102.0 F)
1979
40.6 C (105.1 F)
1980
38.9 C (102.0 F)
1981
39.4 C (102.9 F)
1982
39.4 C (102.9 F)
1983
36.1 C (97.0 F)
1984
38.9 C (102.0 F)
1985
38.9 C (102.0 F)
1986
37.8 C (100.0 F)
1987
37.2 C (99.0 F)
1988
38.3 C (100.9 F)
1989
36.7 C (98.1 F)
1990
39.4 C (102.9 F)
1991
35.6 C (96.1 F)
1992
39.4 C (102.9 F)
1993
34.4 C (93.9 F)
1994
40.6 C (105.1 F)
1995
36.1 C (97.0 F)
1996
37.8 C (100.0 F)
1997
38.3 C (100.9 F)
1998
40.6 C (105.1 F)
1999
37.2 C (99.0 F)
2000
37.2 C (99.0 F)
2001
37.8 C (100.0 F)
2002
39.4 C (102.9 F)
2003
38.9 C (102.0 F)
2004
38.9 C (102.0 F)
2005
32.2 C (90.0 F)
2012
9.4 C (48.9 F)
2013
36.7 C (98.1 F)
2014
39.4 C (102.9 F)
2015
41.7 C (107.1 F)
2016
36.7 C (98.1 F)
2017
37.2 C (99.0 F)
2018
40.6 C (105.1 F)
2019
38.3 C (100.9 F)
2020
33.3 C (91.9 F)
Coldest night (TNn)
The coldest night of the year at Hartline, 1927 to 2020. The record is -28.9 C (-20.0 F) in 1933, marked on the chart; the median year is -19.4 C (-2.9 F).
Coldest night (TNn) at Hartline by year
Year
Coldest night (TNn)
1927
n/a
1928
n/a
1929
-13.3 C (8.1 F)
1930
-23.9 C (-11.0 F)
1931
-21.1 C (-6.0 F)
1932
-26.1 C (-15.0 F)
1933
-28.9 C (-20.0 F)
1934
-10.6 C (12.9 F)
1935
-23.3 C (-9.9 F)
1936
-24.4 C (-11.9 F)
1937
-24.4 C (-11.9 F)
1938
-13.9 C (7.0 F)
1939
-20.0 C (-4.0 F)
1940
-14.4 C (6.1 F)
1941
-12.2 C (10.0 F)
1942
-19.4 C (-2.9 F)
1943
-25.6 C (-14.1 F)
1944
-16.1 C (3.0 F)
1945
-15.6 C (3.9 F)
1946
-13.9 C (7.0 F)
1947
-20.6 C (-5.1 F)
1948
-19.4 C (-2.9 F)
1949
-25.6 C (-14.1 F)
1950
-28.3 C (-18.9 F)
1951
-20.0 C (-4.0 F)
1952
-13.9 C (7.0 F)
1953
-11.1 C (12.0 F)
1954
-22.2 C (-8.0 F)
1955
-20.0 C (-4.0 F)
1956
-28.3 C (-18.9 F)
1957
-27.8 C (-18.0 F)
1958
-12.8 C (9.0 F)
1959
-19.4 C (-2.9 F)
1960
-16.1 C (3.0 F)
1961
-20.6 C (-5.1 F)
1962
-20.0 C (-4.0 F)
1963
-21.7 C (-7.1 F)
1964
-27.2 C (-17.0 F)
1965
-14.4 C (6.1 F)
1966
-16.1 C (3.0 F)
1967
-16.1 C (3.0 F)
1968
-27.2 C (-17.0 F)
1969
-26.1 C (-15.0 F)
1970
-15.6 C (3.9 F)
1971
-17.2 C (1.0 F)
1972
-23.9 C (-11.0 F)
1973
-16.7 C (1.9 F)
1974
-21.1 C (-6.0 F)
1975
-17.8 C (0.0 F)
1976
-15.6 C (3.9 F)
1977
-17.8 C (0.0 F)
1978
-27.8 C (-18.0 F)
1979
-27.8 C (-18.0 F)
1980
-20.6 C (-5.1 F)
1981
-15.0 C (5.0 F)
1982
-23.3 C (-9.9 F)
1983
-28.3 C (-18.9 F)
1984
-21.1 C (-6.0 F)
1985
-23.3 C (-9.9 F)
1986
-17.8 C (0.0 F)
1987
-14.4 C (6.1 F)
1988
-16.1 C (3.0 F)
1989
-21.1 C (-6.0 F)
1990
-20.0 C (-4.0 F)
1991
-25.0 C (-13.0 F)
1992
-13.3 C (8.1 F)
1993
-22.2 C (-8.0 F)
1994
-11.7 C (10.9 F)
1995
-13.9 C (7.0 F)
1996
-26.7 C (-16.1 F)
1997
-15.6 C (3.9 F)
1998
-16.1 C (3.0 F)
1999
-8.3 C (17.1 F)
2000
-13.3 C (8.1 F)
2001
-12.2 C (10.0 F)
2002
-13.9 C (7.0 F)
2003
-9.4 C (15.1 F)
2004
-22.2 C (-8.0 F)
2005
-20.0 C (-4.0 F)
2012
-12.2 C (10.0 F)
2013
-20.6 C (-5.1 F)
2014
-17.2 C (1.0 F)
2015
-13.3 C (8.1 F)
2016
-19.4 C (-2.9 F)
2017
-21.1 C (-6.0 F)
2018
-13.9 C (7.0 F)
2019
-16.7 C (1.9 F)
2020
-17.8 C (0.0 F)
Wettest day (Rx1day)
The wettest day of the year at Hartline, 1927 to 2020. The record is 46.0 mm (1.8 in) in 1979, marked on the chart; the median year is 20.6 mm (0.8 in).
Wettest day (Rx1day) at Hartline by year
Year
Wettest day (Rx1day)
1927
27.4 mm (1.1 in)
1928
10.2 mm (0.4 in)
1929
12.2 mm (0.5 in)
1930
29.5 mm (1.2 in)
1931
18.3 mm (0.7 in)
1932
24.1 mm (0.9 in)
1933
17.8 mm (0.7 in)
1934
15.2 mm (0.6 in)
1935
13.5 mm (0.5 in)
1936
28.7 mm (1.1 in)
1937
35.6 mm (1.4 in)
1938
16.3 mm (0.6 in)
1939
14.0 mm (0.6 in)
1940
19.8 mm (0.8 in)
1941
20.1 mm (0.8 in)
1942
32.3 mm (1.3 in)
1943
17.3 mm (0.7 in)
1944
29.2 mm (1.1 in)
1945
17.8 mm (0.7 in)
1946
33.0 mm (1.3 in)
1947
24.1 mm (0.9 in)
1948
45.7 mm (1.8 in)
1949
12.2 mm (0.5 in)
1950
15.2 mm (0.6 in)
1951
15.7 mm (0.6 in)
1952
13.0 mm (0.5 in)
1953
19.1 mm (0.8 in)
1954
20.3 mm (0.8 in)
1955
14.0 mm (0.6 in)
1956
16.0 mm (0.6 in)
1957
11.9 mm (0.5 in)
1958
26.2 mm (1.0 in)
1959
27.9 mm (1.1 in)
1960
22.4 mm (0.9 in)
1961
16.5 mm (0.6 in)
1962
13.2 mm (0.5 in)
1963
16.5 mm (0.6 in)
1964
8.9 mm (0.35 in)
1965
24.4 mm (1.0 in)
1966
27.4 mm (1.1 in)
1967
16.8 mm (0.7 in)
1968
22.9 mm (0.9 in)
1969
14.5 mm (0.6 in)
1970
16.0 mm (0.6 in)
1971
23.9 mm (0.9 in)
1972
24.6 mm (1.0 in)
1973
17.8 mm (0.7 in)
1974
16.8 mm (0.7 in)
1975
35.6 mm (1.4 in)
1976
10.2 mm (0.4 in)
1977
14.0 mm (0.6 in)
1978
27.9 mm (1.1 in)
1979
46.0 mm (1.8 in)
1980
22.1 mm (0.9 in)
1981
20.3 mm (0.8 in)
1982
26.7 mm (1.1 in)
1983
21.1 mm (0.8 in)
1984
35.6 mm (1.4 in)
1985
11.4 mm (0.4 in)
1986
21.6 mm (0.9 in)
1987
45.2 mm (1.8 in)
1988
18.0 mm (0.7 in)
1989
34.0 mm (1.3 in)
1990
24.4 mm (1.0 in)
1991
20.3 mm (0.8 in)
1992
35.1 mm (1.4 in)
1993
20.8 mm (0.8 in)
1994
22.9 mm (0.9 in)
1995
27.9 mm (1.1 in)
1996
27.4 mm (1.1 in)
1997
19.8 mm (0.8 in)
1998
25.4 mm (1.0 in)
1999
43.2 mm (1.7 in)
2000
23.4 mm (0.9 in)
2001
17.8 mm (0.7 in)
2002
17.5 mm (0.7 in)
2003
23.9 mm (0.9 in)
2004
16.5 mm (0.6 in)
2005
38.1 mm (1.5 in)
2012
17.5 mm (0.7 in)
2013
25.4 mm (1.0 in)
2014
13.7 mm (0.5 in)
2015
27.9 mm (1.1 in)
2016
24.1 mm (0.9 in)
2017
23.9 mm (0.9 in)
2018
16.3 mm (0.6 in)
2019
21.1 mm (0.8 in)
2020
14.0 mm (0.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Hartline, 1927 to 2020. The record is 70.7 mm (2.8 in) in 1992, marked on the chart; the median year is 31.4 mm (1.2 in).
Wettest five days (Rx5day) at Hartline by year
Year
Wettest five days (Rx5day)
1927
40.0 mm (1.6 in)
1928
16.6 mm (0.7 in)
1929
18.8 mm (0.7 in)
1930
38.4 mm (1.5 in)
1931
45.2 mm (1.8 in)
1932
35.0 mm (1.4 in)
1933
25.0 mm (1.0 in)
1934
22.2 mm (0.9 in)
1935
19.5 mm (0.8 in)
1936
57.6 mm (2.3 in)
1937
60.7 mm (2.4 in)
1938
20.8 mm (0.8 in)
1939
20.6 mm (0.8 in)
1940
29.8 mm (1.2 in)
1941
38.9 mm (1.5 in)
1942
40.7 mm (1.6 in)
1943
37.9 mm (1.5 in)
1944
35.1 mm (1.4 in)
1945
35.6 mm (1.4 in)
1946
47.0 mm (1.9 in)
1947
37.6 mm (1.5 in)
1948
51.3 mm (2.0 in)
1949
25.4 mm (1.0 in)
1950
31.0 mm (1.2 in)
1951
25.7 mm (1.0 in)
1952
17.8 mm (0.7 in)
1953
28.4 mm (1.1 in)
1954
40.8 mm (1.6 in)
1955
18.1 mm (0.7 in)
1956
38.6 mm (1.5 in)
1957
38.8 mm (1.5 in)
1958
39.9 mm (1.6 in)
1959
38.1 mm (1.5 in)
1960
31.5 mm (1.2 in)
1961
29.2 mm (1.1 in)
1962
22.9 mm (0.9 in)
1963
26.6 mm (1.0 in)
1964
22.9 mm (0.9 in)
1965
42.4 mm (1.7 in)
1966
37.1 mm (1.5 in)
1967
23.8 mm (0.9 in)
1968
39.1 mm (1.5 in)
1969
23.9 mm (0.9 in)
1970
29.8 mm (1.2 in)
1971
28.2 mm (1.1 in)
1972
45.4 mm (1.8 in)
1973
67.8 mm (2.7 in)
1974
24.6 mm (1.0 in)
1975
37.9 mm (1.5 in)
1976
13.3 mm (0.5 in)
1977
32.4 mm (1.3 in)
1978
32.7 mm (1.3 in)
1979
54.6 mm (2.1 in)
1980
36.2 mm (1.4 in)
1981
22.8 mm (0.9 in)
1982
36.3 mm (1.4 in)
1983
36.9 mm (1.5 in)
1984
35.6 mm (1.4 in)
1985
15.3 mm (0.6 in)
1986
24.4 mm (1.0 in)
1987
45.2 mm (1.8 in)
1988
23.6 mm (0.9 in)
1989
52.0 mm (2.0 in)
1990
35.0 mm (1.4 in)
1991
36.6 mm (1.4 in)
1992
70.7 mm (2.8 in)
1993
33.8 mm (1.3 in)
1994
28.2 mm (1.1 in)
1995
43.0 mm (1.7 in)
1996
30.2 mm (1.2 in)
1997
26.4 mm (1.0 in)
1998
25.4 mm (1.0 in)
1999
43.2 mm (1.7 in)
2000
23.4 mm (0.9 in)
2001
31.2 mm (1.2 in)
2002
27.2 mm (1.1 in)
2003
23.9 mm (0.9 in)
2004
16.5 mm (0.6 in)
2005
38.1 mm (1.5 in)
2012
21.1 mm (0.8 in)
2013
26.9 mm (1.1 in)
2014
24.6 mm (1.0 in)
2015
44.9 mm (1.8 in)
2016
37.3 mm (1.5 in)
2017
26.7 mm (1.1 in)
2018
25.7 mm (1.0 in)
2019
24.7 mm (1.0 in)
2020
25.4 mm (1.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Hartline, 1927 to 2020. The record is 101 days in 1932, marked on the chart; the median year is 44 days.
Longest dry spell (CDD) at Hartline by year
Year
Longest dry spell (CDD)
1927
63 days
1928
2 days
1929
74 days
1930
56 days
1931
43 days
1932
101 days
1933
35 days
1934
42 days
1935
20 days
1936
29 days
1937
33 days
1938
67 days
1939
38 days
1940
44 days
1941
30 days
1942
45 days
1943
46 days
1944
65 days
1945
67 days
1946
53 days
1947
40 days
1948
45 days
1949
37 days
1950
67 days
1951
23 days
1952
24 days
1953
44 days
1954
47 days
1955
48 days
1956
44 days
1957
48 days
1958
26 days
1959
53 days
1960
79 days
1961
55 days
1962
42 days
1963
24 days
1964
45 days
1965
42 days
1966
28 days
1967
74 days
1968
38 days
1969
77 days
1970
40 days
1971
53 days
1972
36 days
1973
40 days
1974
52 days
1975
32 days
1976
48 days
1977
39 days
1978
46 days
1979
38 days
1980
37 days
1981
38 days
1982
22 days
1983
29 days
1984
30 days
1985
53 days
1986
57 days
1987
81 days
1988
87 days
1989
56 days
1990
45 days
1991
53 days
1992
61 days
1993
67 days
1994
62 days
1995
24 days
1996
29 days
1997
30 days
1998
35 days
1999
57 days
2000
54 days
2001
77 days
2002
88 days
2003
48 days
2004
36 days
2005
32 days
2012
6 days
2013
51 days
2014
46 days
2015
35 days
2016
20 days
2017
20 days
2018
36 days
2019
32 days
2020
32 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
50 years with a frost
Across 50 years with a frost, the median last spring frost at Hartline falls on 11 May and the median first autumn frost on 5 October, which leaves a median of 143 days between them.
Fitted over all years, the growing season changes by +1.5 days per decade at this station.
Frost dates and growing season at Hartline
Measure
Median, all years
Earliest period
Recent period (1960 to 2019)
Recent against earliest
Fitted trend
Last spring frost
11 May
n/a
11 May
n/a
-0.8 days per decade
First autumn frost
5 October
n/a
7 October
n/a
+0.7 days per decade
Growing days
143 days
n/a
143 days
n/a
+1.5 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
44 years, 1930 to 2019
A day with at least 21.5 mm (0.8 in) of rain is expected about once in 2 years. A day with at least 58.0 mm (2.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Hartline: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
21.5 mm (0.8 in)
5 years
29.6 mm (1.2 in)
10 years
35.6 mm (1.4 in)
25 years
43.9 mm (1.7 in)
50 years
50.7 mm (2.0 in)
Longer than the 44 years of record
100 years
58.0 mm (2.3 in)
Longer than the 44 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, 44 years of values from 1930 to 2019.
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: 46.0 mm (1.8 in) in 1979; 45.7 mm (1.8 in) in 1948; 45.2 mm (1.8 in) in 1987.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Hartline standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Hartline 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.