Record envelope, standing records and threshold days for Parma Exp STN (USC00106844), Idaho, United States, with 105 years of record.
Key Facts for Parma Exp STN
Parma Exp STN (USC00106844) is a weather station in Idaho, United States at 43.80 latitude and -116.94 longitude, 698 m (2,290 ft) above sea level.
The station reports from 1922 to 2026, 105 years of record.
1,464 records set at Parma Exp STN still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Parma Exp STN set a daily record high minimum temperature of 19.4 C (66.9 F) on 20 July 2026.
About the Station
Location: Idaho, United States, 43.80 latitude, -116.94 longitude.
Elevation: 698 m (2,290 ft).
Period of record: 1922 to 2026, 105 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
1 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 Parma Exp STN. The lines show the 2026 daily maximum and minimum. 1 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Parma Exp STN, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
18.3 C (64.9 F)
-36.1 C (-33.0 F)
12.2 C (54.0 F)
-9.4 C (15.1 F)
Feb
19.4 C (66.9 F)
-31.7 C (-25.1 F)
16.1 C (61.0 F)
-6.1 C (21.0 F)
Mar
28.9 C (84.0 F)
-16.7 C (1.9 F)
n/a
n/a
Apr
34.4 C (93.9 F)
-10.6 C (12.9 F)
25.6 C (78.1 F)
-2.8 C (27.0 F)
May
37.8 C (100.0 F)
-5.6 C (21.9 F)
32.2 C (90.0 F)
5.0 C (41.0 F)
Jun
41.1 C (106.0 F)
-0.6 C (30.9 F)
35.6 C (96.1 F)
4.4 C (39.9 F)
Jul
43.3 C (109.9 F)
0.6 C (33.1 F)
38.3 C (100.9 F)
13.3 C (55.9 F)
Aug
41.7 C (107.1 F)
1.1 C (34.0 F)
37.2 C (99.0 F)
5.6 C (42.1 F)
Sep
39.4 C (102.9 F)
-9.4 C (15.1 F)
n/a
n/a
Oct
35.0 C (95.0 F)
-12.8 C (9.0 F)
29.4 C (84.9 F)
5.0 C (41.0 F)
Nov
25.6 C (78.1 F)
-22.8 C (-9.0 F)
n/a
n/a
Dec
20.0 C (68.0 F)
-37.2 C (-35.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Parma Exp STN still stand. 1929 holds the most, with 42.
Standing records at Parma Exp STN by the year they were set
Year set
Standing records
1922
2
1923
14
1924
40
1925
17
1926
23
1927
21
1928
18
1929
42
1930
28
1931
20
1932
12
1933
21
1934
25
1935
15
1936
28
1937
20
1938
19
1939
17
1940
18
1941
9
1942
8
1943
10
1944
14
1945
19
1946
9
1947
7
1948
16
1949
19
1950
20
1951
11
1952
6
1953
21
1954
18
1955
20
1956
17
1957
14
1958
5
1959
10
1960
16
1961
19
1962
17
1963
14
1964
18
1965
22
1966
27
1967
9
1968
15
1969
16
1970
18
1971
21
1972
34
1973
8
1974
21
1975
23
1976
5
1977
23
1978
11
1979
19
1980
12
1981
8
1982
8
1983
17
1984
12
1985
41
1986
16
1987
14
1988
10
1989
20
1990
16
1991
7
1992
19
1993
24
1994
9
1995
15
1996
15
1997
11
1998
10
1999
8
2000
8
2001
7
2002
17
2003
18
2004
9
2005
4
2006
11
2007
8
2008
5
2009
8
2010
8
2011
8
2012
5
2016
3
2019
7
2020
11
2021
1
2022
6
2023
3
2024
5
2025
7
2026
4
All-Time Record Progression
9 new records
9 all-time records were set at Parma Exp STN between 12 May 1958 and 1 December 2010. Each dot is a new record.
When Parma Exp STN set new all-time records
Date
Kind
Detail
1958-05-12
Record daily precipitation
Record daily precipitation 36.8 mm (1.4 in)
1959-09-14
Record daily precipitation
Record daily precipitation 39.4 mm (1.6 in)
1979-08-14
Record daily precipitation
Record daily precipitation 39.9 mm (1.6 in)
1982-01-02
Record snow depth
Record snow depth 45.7 cm (18.0 in)
1983-12-30
Record snow depth
Record snow depth 48.3 cm (19.0 in)
1983-12-31
Record snow depth
Record snow depth 53.3 cm (21.0 in)
1999-01-26
Record daily precipitation
Record daily precipitation 43.2 mm (1.7 in)
2002-07-12
Record high maximum temperature
Record high maximum temperature 43.3 C (109.9 F)
2010-12-01
Record daily snowfall
Record daily snowfall 25.9 cm (10.2 in)
Wettest Day of Each Month
Jan: 43.2 mm (1.7 in)
The wettest day on record for each calendar month at Parma Exp STN. The most was 43.2 mm (1.7 in) on 26 January 1999.
Record daily precipitation for each month at Parma Exp STN
Month
Record daily precipitation (mm)
Date
Jan
43.2 mm (1.7 in)
26 January 1999
Feb
18.0 mm (0.7 in)
8 February 1953
Mar
29.5 mm (1.2 in)
31 March 1996
Apr
21.8 mm (0.9 in)
29 April 1933
May
36.8 mm (1.4 in)
12 May 1958
Jun
28.7 mm (1.1 in)
19 June 1975
Jul
31.0 mm (1.2 in)
9 July 1965
Aug
39.9 mm (1.6 in)
14 August 1979
Sep
39.4 mm (1.6 in)
14 September 1959
Oct
30.5 mm (1.2 in)
4 October 1923
Nov
21.1 mm (0.8 in)
30 November 1993
Dec
28.7 mm (1.1 in)
24 December 1968
Period of Record Coverage
1922 to 2026
Complete yearUnder 90 percent of days
102 years of record at Parma Exp STN, 1922 to 2026. 13 years have data for under 90 percent of days and are left out of rankings: 1922, 1984, 2012, 2016, 2017, 2018, 2019, 2021 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 78 complete years at Parma Exp STN, 1923 to 2020. Blue stripes are years cooler than the station's own mean of 10.3 C (50.6 F); red stripes are warmer. The coolest year was 1985, at 7.2 C (45.0 F), and the warmest was 1934, at 12.7 C (54.8 F). The strongest colour marks a difference of 3.2 C (5.8 F).
Annual mean temperature at Parma Exp STN as warming stripes, 1923 to 2020
Year
Annual mean temperature
Difference from the station mean
1923
10.6 C
+0.24 C
1924
10.0 C
-0.33 C
1925
11.0 C
+0.72 C
1927
10.7 C
+0.40 C
1928
10.7 C
+0.38 C
1929
10.4 C
+0.05 C
1930
10.6 C
+0.27 C
1931
11.2 C
+0.88 C
1932
10.2 C
-0.17 C
1933
10.3 C
-0.07 C
1934
12.7 C
+2.34 C
1935
9.9 C
-0.43 C
1936
10.5 C
+0.13 C
1937
10.2 C
-0.10 C
1938
11.1 C
+0.76 C
1939
11.3 C
+0.99 C
1940
11.5 C
+1.14 C
1942
9.5 C
-0.83 C
1943
9.7 C
-0.61 C
1944
8.8 C
-1.50 C
1945
10.0 C
-0.31 C
1946
10.8 C
+0.46 C
1947
10.9 C
+0.62 C
1948
9.9 C
-0.40 C
1949
10.1 C
-0.23 C
1950
10.3 C
-0.01 C
1951
10.0 C
-0.28 C
1952
10.4 C
+0.08 C
1953
11.1 C
+0.82 C
1954
10.9 C
+0.56 C
1955
9.5 C
-0.87 C
1956
9.9 C
-0.40 C
1957
9.6 C
-0.71 C
1958
11.4 C
+1.10 C
1959
10.3 C
-0.04 C
1960
10.1 C
-0.26 C
1961
11.0 C
+0.70 C
1962
9.9 C
-0.41 C
1963
10.0 C
-0.28 C
1966
10.5 C
+0.19 C
1967
10.8 C
+0.52 C
1969
10.4 C
+0.11 C
1970
10.5 C
+0.17 C
1971
10.2 C
-0.09 C
1972
9.7 C
-0.65 C
1973
10.7 C
+0.38 C
1974
10.2 C
-0.13 C
1975
9.3 C
-1.02 C
1976
8.9 C
-1.41 C
1978
9.8 C
-0.48 C
1979
9.3 C
-1.00 C
1980
9.9 C
-0.44 C
1981
10.4 C
+0.06 C
1982
8.6 C
-1.76 C
1985
7.2 C
-3.11 C
1986
10.1 C
-0.24 C
1987
10.7 C
+0.37 C
1988
10.5 C
+0.16 C
1989
8.8 C
-1.53 C
1990
10.4 C
+0.03 C
1991
9.7 C
-0.58 C
1992
10.6 C
+0.31 C
1993
8.5 C
-1.80 C
1994
10.7 C
+0.41 C
1995
10.8 C
+0.43 C
1997
11.0 C
+0.69 C
1999
10.8 C
+0.52 C
2000
11.1 C
+0.80 C
2001
11.0 C
+0.68 C
2002
10.9 C
+0.56 C
2003
12.1 C
+1.76 C
2004
11.0 C
+0.66 C
2007
11.3 C
+1.00 C
2008
10.3 C
-0.07 C
2009
10.5 C
+0.19 C
2010
10.7 C
+0.33 C
2011
10.0 C
-0.31 C
2020
10.6 C
+0.25 C
The fitted trend in annual mean temperature here over 1923 to 2020 is -0.02 C (-0.09 to 0.05) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.03 F (-0.16 to 0.09) per decade. The slope is a straight line fitted to 78 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Parma Exp STN
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.02 C (-0.09 to 0.05) per decade
-0.03 F (-0.16 to 0.09) per decade
1923 to 2020
78
Not clearly different from zero
Mean daily maximum
-0.11 C (-0.19 to -0.03) per decade
-0.2 F (-0.3 to -0.1) per decade
1923 to 2020
78
Fall
Mean daily minimum
0.07 C (0.00 to 0.15) per decade
0.13 F (0.00 to 0.26) per decade
1923 to 2020
78
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
1922 to 2026
Yearly extremes at Parma Exp STN: 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)
2002
39.4 C (102.9 F)
102
Coldest night (TNn)
-37.2 C (-35.0 F)
1924
-18.6 C (-1.5 F)
102
Wettest day (Rx1day)
43.2 mm (1.7 in)
1999
18.3 mm (0.7 in)
101
Wettest five days (Rx5day)
69.1 mm (2.7 in)
1969
30.5 mm (1.2 in)
100
Longest dry spell (CDD)
144 days
1928
48 days
101
Hottest day (TXx)
The hottest day of the year at Parma Exp STN, 1922 to 2026. The record is 43.3 C (109.9 F) in 2002, marked on the chart; the median year is 39.4 C (102.9 F).
Hottest day (TXx) at Parma Exp STN by year
Year
Hottest day (TXx)
1922
17.2 C (63.0 F)
1923
38.9 C (102.0 F)
1924
41.7 C (107.1 F)
1925
40.6 C (105.1 F)
1926
40.0 C (104.0 F)
1927
40.6 C (105.1 F)
1928
42.8 C (109.0 F)
1929
41.7 C (107.1 F)
1930
41.1 C (106.0 F)
1931
42.2 C (108.0 F)
1932
38.9 C (102.0 F)
1933
40.6 C (105.1 F)
1934
42.8 C (109.0 F)
1935
40.0 C (104.0 F)
1936
41.7 C (107.1 F)
1937
40.0 C (104.0 F)
1938
38.9 C (102.0 F)
1939
41.1 C (106.0 F)
1940
41.1 C (106.0 F)
1941
37.8 C (100.0 F)
1942
37.8 C (100.0 F)
1943
36.1 C (97.0 F)
1944
35.6 C (96.1 F)
1945
36.1 C (97.0 F)
1946
40.6 C (105.1 F)
1947
41.7 C (107.1 F)
1948
38.3 C (100.9 F)
1949
40.6 C (105.1 F)
1950
38.3 C (100.9 F)
1951
40.6 C (105.1 F)
1952
38.9 C (102.0 F)
1953
37.8 C (100.0 F)
1954
38.9 C (102.0 F)
1955
38.9 C (102.0 F)
1956
38.9 C (102.0 F)
1957
36.7 C (98.1 F)
1958
38.9 C (102.0 F)
1959
40.6 C (105.1 F)
1960
40.6 C (105.1 F)
1961
41.1 C (106.0 F)
1962
38.3 C (100.9 F)
1963
37.2 C (99.0 F)
1964
38.3 C (100.9 F)
1965
38.3 C (100.9 F)
1966
39.4 C (102.9 F)
1967
40.6 C (105.1 F)
1968
38.3 C (100.9 F)
1969
40.0 C (104.0 F)
1970
41.1 C (106.0 F)
1971
41.1 C (106.0 F)
1972
39.4 C (102.9 F)
1973
40.0 C (104.0 F)
1974
41.1 C (106.0 F)
1975
39.4 C (102.9 F)
1976
38.9 C (102.0 F)
1977
41.1 C (106.0 F)
1978
41.1 C (106.0 F)
1979
40.6 C (105.1 F)
1980
39.4 C (102.9 F)
1981
38.3 C (100.9 F)
1982
37.2 C (99.0 F)
1983
40.0 C (104.0 F)
1984
37.8 C (100.0 F)
1985
38.3 C (100.9 F)
1986
37.8 C (100.0 F)
1987
38.3 C (100.9 F)
1988
40.0 C (104.0 F)
1989
37.8 C (100.0 F)
1990
40.6 C (105.1 F)
1991
38.9 C (102.0 F)
1992
40.6 C (105.1 F)
1993
36.7 C (98.1 F)
1994
40.6 C (105.1 F)
1995
38.9 C (102.0 F)
1996
40.6 C (105.1 F)
1997
38.9 C (102.0 F)
1998
40.6 C (105.1 F)
1999
40.6 C (105.1 F)
2000
38.9 C (102.0 F)
2001
40.6 C (105.1 F)
2002
43.3 C (109.9 F)
2003
42.2 C (108.0 F)
2004
40.0 C (104.0 F)
2005
39.4 C (102.9 F)
2006
41.7 C (107.1 F)
2007
40.6 C (105.1 F)
2008
37.8 C (100.0 F)
2009
39.4 C (102.9 F)
2010
37.8 C (100.0 F)
2011
37.8 C (100.0 F)
2012
32.8 C (91.0 F)
2014
n/a
2016
39.4 C (102.9 F)
2017
2.8 C (37.0 F)
2018
17.8 C (64.0 F)
2019
32.8 C (91.0 F)
2020
38.9 C (102.0 F)
2021
31.1 C (88.0 F)
2022
40.6 C (105.1 F)
2023
40.0 C (104.0 F)
2024
39.4 C (102.9 F)
2025
38.9 C (102.0 F)
2026
38.3 C (100.9 F)
Coldest night (TNn)
The coldest night of the year at Parma Exp STN, 1922 to 2026. The record is -37.2 C (-35.0 F) in 1924, marked on the chart; the median year is -18.6 C (-1.5 F).
Coldest night (TNn) at Parma Exp STN by year
Year
Coldest night (TNn)
1922
-21.1 C (-6.0 F)
1923
-18.3 C (-0.9 F)
1924
-37.2 C (-35.0 F)
1925
-16.1 C (3.0 F)
1926
-20.6 C (-5.1 F)
1927
-18.3 C (-0.9 F)
1928
-19.4 C (-2.9 F)
1929
-22.8 C (-9.0 F)
1930
-36.1 C (-33.0 F)
1931
-21.7 C (-7.1 F)
1932
-23.9 C (-11.0 F)
1933
-26.7 C (-16.1 F)
1934
-8.9 C (16.0 F)
1935
-18.9 C (-2.0 F)
1936
-20.6 C (-5.1 F)
1937
-33.3 C (-27.9 F)
1938
-13.9 C (7.0 F)
1939
-12.2 C (10.0 F)
1940
-17.8 C (0.0 F)
1941
-13.3 C (8.1 F)
1942
-24.4 C (-11.9 F)
1943
-22.8 C (-9.0 F)
1944
-23.9 C (-11.0 F)
1945
-17.8 C (0.0 F)
1946
-12.2 C (10.0 F)
1947
-20.0 C (-4.0 F)
1948
-21.1 C (-6.0 F)
1949
-28.9 C (-20.0 F)
1950
-28.9 C (-20.0 F)
1951
-17.8 C (0.0 F)
1952
-17.2 C (1.0 F)
1953
-9.4 C (15.1 F)
1954
-15.0 C (5.0 F)
1955
-22.8 C (-9.0 F)
1956
-24.4 C (-11.9 F)
1957
-33.3 C (-27.9 F)
1958
-13.9 C (7.0 F)
1959
-19.4 C (-2.9 F)
1960
-17.2 C (1.0 F)
1961
-15.6 C (3.9 F)
1962
-32.8 C (-27.0 F)
1963
-23.3 C (-9.9 F)
1964
-20.0 C (-4.0 F)
1965
-17.8 C (0.0 F)
1966
-16.7 C (1.9 F)
1967
-18.9 C (-2.0 F)
1968
-15.0 C (5.0 F)
1969
-12.8 C (9.0 F)
1970
-12.8 C (9.0 F)
1971
-15.6 C (3.9 F)
1972
-32.8 C (-27.0 F)
1973
-16.1 C (3.0 F)
1974
-22.2 C (-8.0 F)
1975
-22.2 C (-8.0 F)
1976
-17.8 C (0.0 F)
1977
-27.2 C (-17.0 F)
1978
-20.0 C (-4.0 F)
1979
-31.7 C (-25.1 F)
1980
-19.4 C (-2.9 F)
1981
-19.4 C (-2.9 F)
1982
-25.0 C (-13.0 F)
1983
-29.4 C (-20.9 F)
1984
-27.8 C (-18.0 F)
1985
-28.9 C (-20.0 F)
1986
-19.4 C (-2.9 F)
1987
-15.6 C (3.9 F)
1988
-23.3 C (-9.9 F)
1989
-31.7 C (-25.1 F)
1990
-29.4 C (-20.9 F)
1991
-21.1 C (-6.0 F)
1992
-24.4 C (-11.9 F)
1993
-21.1 C (-6.0 F)
1994
-17.8 C (0.0 F)
1995
-16.1 C (3.0 F)
1996
-13.3 C (8.1 F)
1997
-13.3 C (8.1 F)
1998
-19.4 C (-2.9 F)
1999
-11.7 C (10.9 F)
2000
-10.0 C (14.0 F)
2001
-13.9 C (7.0 F)
2002
-12.2 C (10.0 F)
2003
-11.1 C (12.0 F)
2004
-17.2 C (1.0 F)
2005
-15.0 C (5.0 F)
2006
-12.8 C (9.0 F)
2007
-13.9 C (7.0 F)
2008
-17.2 C (1.0 F)
2009
-19.4 C (-2.9 F)
2010
-13.3 C (8.1 F)
2011
-15.0 C (5.0 F)
2012
-10.6 C (12.9 F)
2014
n/a
2016
-22.2 C (-8.0 F)
2017
-22.2 C (-8.0 F)
2018
-10.6 C (12.9 F)
2019
-12.8 C (9.0 F)
2020
-10.6 C (12.9 F)
2021
-7.2 C (19.0 F)
2022
-13.3 C (8.1 F)
2023
-11.7 C (10.9 F)
2024
-21.7 C (-7.1 F)
2025
-16.1 C (3.0 F)
2026
-9.4 C (15.1 F)
Wettest day (Rx1day)
The wettest day of the year at Parma Exp STN, 1922 to 2026. The record is 43.2 mm (1.7 in) in 1999, marked on the chart; the median year is 18.3 mm (0.7 in).
Wettest day (Rx1day) at Parma Exp STN by year
Year
Wettest day (Rx1day)
1922
14.0 mm (0.6 in)
1923
30.5 mm (1.2 in)
1924
16.0 mm (0.6 in)
1925
26.7 mm (1.1 in)
1926
14.2 mm (0.6 in)
1927
16.3 mm (0.6 in)
1928
16.0 mm (0.6 in)
1929
19.1 mm (0.8 in)
1930
12.7 mm (0.5 in)
1931
12.7 mm (0.5 in)
1932
24.1 mm (0.9 in)
1933
29.0 mm (1.1 in)
1934
14.2 mm (0.6 in)
1935
15.2 mm (0.6 in)
1936
17.5 mm (0.7 in)
1937
23.9 mm (0.9 in)
1938
23.1 mm (0.9 in)
1939
12.4 mm (0.5 in)
1940
35.8 mm (1.4 in)
1941
35.8 mm (1.4 in)
1942
17.8 mm (0.7 in)
1943
20.6 mm (0.8 in)
1944
17.3 mm (0.7 in)
1945
23.6 mm (0.9 in)
1946
10.9 mm (0.4 in)
1947
16.0 mm (0.6 in)
1948
15.5 mm (0.6 in)
1949
10.2 mm (0.4 in)
1950
10.4 mm (0.4 in)
1951
13.7 mm (0.5 in)
1952
17.0 mm (0.7 in)
1953
25.1 mm (1.0 in)
1954
20.8 mm (0.8 in)
1955
19.8 mm (0.8 in)
1956
25.4 mm (1.0 in)
1957
20.8 mm (0.8 in)
1958
36.8 mm (1.4 in)
1959
39.4 mm (1.6 in)
1960
17.3 mm (0.7 in)
1961
17.3 mm (0.7 in)
1962
29.2 mm (1.1 in)
1963
19.8 mm (0.8 in)
1964
20.6 mm (0.8 in)
1965
31.0 mm (1.2 in)
1966
10.7 mm (0.4 in)
1967
22.4 mm (0.9 in)
1968
28.7 mm (1.1 in)
1969
34.5 mm (1.4 in)
1970
27.2 mm (1.1 in)
1971
17.0 mm (0.7 in)
1972
23.6 mm (0.9 in)
1973
14.7 mm (0.6 in)
1974
13.5 mm (0.5 in)
1975
28.7 mm (1.1 in)
1976
20.3 mm (0.8 in)
1977
17.3 mm (0.7 in)
1978
26.2 mm (1.0 in)
1979
39.9 mm (1.6 in)
1980
22.6 mm (0.9 in)
1981
23.4 mm (0.9 in)
1982
20.8 mm (0.8 in)
1983
15.2 mm (0.6 in)
1984
20.3 mm (0.8 in)
1985
19.1 mm (0.8 in)
1986
17.8 mm (0.7 in)
1987
22.9 mm (0.9 in)
1988
19.8 mm (0.8 in)
1989
14.2 mm (0.6 in)
1990
10.7 mm (0.4 in)
1991
16.0 mm (0.6 in)
1992
24.6 mm (1.0 in)
1993
21.1 mm (0.8 in)
1994
14.0 mm (0.6 in)
1995
21.1 mm (0.8 in)
1996
31.8 mm (1.3 in)
1997
23.1 mm (0.9 in)
1998
18.0 mm (0.7 in)
1999
43.2 mm (1.7 in)
2000
17.0 mm (0.7 in)
2001
17.8 mm (0.7 in)
2002
17.0 mm (0.7 in)
2003
12.2 mm (0.5 in)
2004
15.0 mm (0.6 in)
2005
26.7 mm (1.1 in)
2006
19.6 mm (0.8 in)
2007
19.8 mm (0.8 in)
2008
16.8 mm (0.7 in)
2009
17.3 mm (0.7 in)
2010
18.3 mm (0.7 in)
2011
16.8 mm (0.7 in)
2012
9.1 mm (0.36 in)
2014
10.9 mm (0.4 in)
2016
15.7 mm (0.6 in)
2017
5.3 mm (0.21 in)
2018
4.6 mm (0.18 in)
2019
32.8 mm (1.3 in)
2020
36.3 mm (1.4 in)
2021
10.9 mm (0.4 in)
2022
27.4 mm (1.1 in)
2023
15.7 mm (0.6 in)
2024
8.6 mm (0.34 in)
2025
n/a
2026
n/a
Wettest five days (Rx5day)
The wettest five days of the year at Parma Exp STN, 1922 to 2026. The record is 69.1 mm (2.7 in) in 1969, marked on the chart; the median year is 30.5 mm (1.2 in).
Wettest five days (Rx5day) at Parma Exp STN by year
Year
Wettest five days (Rx5day)
1922
18.5 mm (0.7 in)
1923
51.8 mm (2.0 in)
1924
28.7 mm (1.1 in)
1925
26.7 mm (1.1 in)
1926
38.3 mm (1.5 in)
1927
28.0 mm (1.1 in)
1928
18.5 mm (0.7 in)
1929
40.7 mm (1.6 in)
1930
20.5 mm (0.8 in)
1931
19.4 mm (0.8 in)
1932
24.1 mm (0.9 in)
1933
43.4 mm (1.7 in)
1934
27.8 mm (1.1 in)
1935
33.8 mm (1.3 in)
1936
32.0 mm (1.3 in)
1937
32.7 mm (1.3 in)
1938
27.7 mm (1.1 in)
1939
14.9 mm (0.6 in)
1940
38.1 mm (1.5 in)
1941
35.8 mm (1.4 in)
1942
31.3 mm (1.2 in)
1943
36.9 mm (1.5 in)
1944
26.7 mm (1.1 in)
1945
42.4 mm (1.7 in)
1946
20.1 mm (0.8 in)
1947
43.0 mm (1.7 in)
1948
16.5 mm (0.6 in)
1949
12.3 mm (0.5 in)
1950
19.4 mm (0.8 in)
1951
30.7 mm (1.2 in)
1952
17.0 mm (0.7 in)
1953
35.3 mm (1.4 in)
1954
31.0 mm (1.2 in)
1955
37.1 mm (1.5 in)
1956
44.6 mm (1.8 in)
1957
38.6 mm (1.5 in)
1958
43.9 mm (1.7 in)
1959
53.1 mm (2.1 in)
1960
29.8 mm (1.2 in)
1961
29.8 mm (1.2 in)
1962
46.4 mm (1.8 in)
1963
30.0 mm (1.2 in)
1964
29.5 mm (1.2 in)
1965
32.7 mm (1.3 in)
1966
19.3 mm (0.8 in)
1967
28.9 mm (1.1 in)
1968
56.5 mm (2.2 in)
1969
69.1 mm (2.7 in)
1970
48.5 mm (1.9 in)
1971
39.4 mm (1.6 in)
1972
63.7 mm (2.5 in)
1973
23.0 mm (0.9 in)
1974
23.9 mm (0.9 in)
1975
33.3 mm (1.3 in)
1976
41.4 mm (1.6 in)
1977
35.6 mm (1.4 in)
1978
49.1 mm (1.9 in)
1979
42.4 mm (1.7 in)
1980
55.6 mm (2.2 in)
1981
36.4 mm (1.4 in)
1982
43.1 mm (1.7 in)
1983
29.7 mm (1.2 in)
1984
27.6 mm (1.1 in)
1985
30.4 mm (1.2 in)
1986
29.4 mm (1.2 in)
1987
30.5 mm (1.2 in)
1988
26.4 mm (1.0 in)
1989
25.9 mm (1.0 in)
1990
23.2 mm (0.9 in)
1991
35.1 mm (1.4 in)
1992
28.9 mm (1.1 in)
1993
35.8 mm (1.4 in)
1994
24.8 mm (1.0 in)
1995
36.4 mm (1.4 in)
1996
68.1 mm (2.7 in)
1997
29.9 mm (1.2 in)
1998
39.8 mm (1.6 in)
1999
49.1 mm (1.9 in)
2000
32.3 mm (1.3 in)
2001
36.8 mm (1.4 in)
2002
22.8 mm (0.9 in)
2003
20.8 mm (0.8 in)
2004
27.9 mm (1.1 in)
2005
58.5 mm (2.3 in)
2006
35.6 mm (1.4 in)
2007
20.6 mm (0.8 in)
2008
27.5 mm (1.1 in)
2009
29.1 mm (1.1 in)
2010
28.6 mm (1.1 in)
2011
26.9 mm (1.1 in)
2012
16.0 mm (0.6 in)
2014
12.5 mm (0.5 in)
2016
17.6 mm (0.7 in)
2017
n/a
2018
10.7 mm (0.4 in)
2019
42.0 mm (1.7 in)
2020
59.4 mm (2.3 in)
2021
23.2 mm (0.9 in)
2022
33.5 mm (1.3 in)
2023
18.2 mm (0.7 in)
2024
7.6 mm (0.30 in)
2025
n/a
2026
n/a
Longest dry spell (CDD)
The longest dry spell of the year at Parma Exp STN, 1922 to 2026. The record is 144 days in 1928, marked on the chart; the median year is 48 days.
Longest dry spell (CDD) at Parma Exp STN by year
Year
Longest dry spell (CDD)
1922
17 days
1923
66 days
1924
56 days
1925
28 days
1926
50 days
1927
46 days
1928
144 days
1929
76 days
1930
55 days
1931
44 days
1932
79 days
1933
50 days
1934
64 days
1935
78 days
1936
60 days
1937
48 days
1938
52 days
1939
69 days
1940
62 days
1941
27 days
1942
47 days
1943
52 days
1944
46 days
1945
66 days
1946
43 days
1947
82 days
1948
43 days
1949
107 days
1950
49 days
1951
36 days
1952
67 days
1953
68 days
1954
34 days
1955
52 days
1956
30 days
1957
76 days
1958
27 days
1959
52 days
1960
44 days
1961
50 days
1962
53 days
1963
38 days
1964
37 days
1965
28 days
1966
63 days
1967
80 days
1968
40 days
1969
56 days
1970
54 days
1971
50 days
1972
71 days
1973
55 days
1974
90 days
1975
43 days
1976
35 days
1977
48 days
1978
72 days
1979
54 days
1980
45 days
1981
43 days
1982
52 days
1983
32 days
1984
18 days
1985
38 days
1986
41 days
1987
87 days
1988
60 days
1989
35 days
1990
38 days
1991
71 days
1992
41 days
1993
50 days
1994
35 days
1995
25 days
1996
37 days
1997
23 days
1998
37 days
1999
75 days
2000
80 days
2001
46 days
2002
54 days
2003
35 days
2004
46 days
2005
68 days
2006
47 days
2007
69 days
2008
42 days
2009
34 days
2010
52 days
2011
78 days
2012
31 days
2014
9 days
2016
55 days
2017
4 days
2018
23 days
2019
38 days
2020
34 days
2021
14 days
2022
30 days
2023
19 days
2024
5 days
2025
n/a
2026
n/a
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
78 years with a frost
Across 78 years with a frost, the median last spring frost at Parma Exp STN falls on 5 May and the median first autumn frost on 29 September, which leaves a median of 145 days between them.
In 1976 to 2020 the median growing season was 153 days. That is 8 days more than in 1923 to 1954.
Fitted over all years, the growing season changes by +1.5 days per decade at this station.
Frost dates and growing season at Parma Exp STN
Measure
Median, all years
Earliest period (1923 to 1954)
Recent period (1976 to 2020)
Recent against earliest
Fitted trend
Last spring frost
5 May
6 May
4 May
2 days earlier
-0.2 days per decade
First autumn frost
29 September
28 September
5 October
7 days later
+1.3 days per decade
Growing days
145 days
145 days
153 days
8 days more
+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
89 years, 1923 to 2020
A day with at least 19.5 mm (0.8 in) of rain is expected about once in 2 years. A day with at least 46.8 mm (1.8 in) of rain is expected about once in 100 years.
Rainfall return levels at Parma Exp STN: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
19.5 mm (0.8 in)
5 years
26.0 mm (1.0 in)
10 years
30.6 mm (1.2 in)
25 years
36.8 mm (1.4 in)
50 years
41.7 mm (1.6 in)
100 years
46.8 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 1923 to 2020.
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: 43.2 mm (1.7 in) in 1999; 39.9 mm (1.6 in) in 1979; 39.4 mm (1.6 in) in 1959.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of Parma Exp STN, at 1963 and 1997. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1963 ran 0.4 C (0.7 F) lower than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1997 ran 0.3 C (0.5 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Parma Exp STN, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1963
-0.4
-0.7
likely
5
1997
+0.3
+0.5
likely
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 Parma Exp STN standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Parma Exp STN 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.