Record envelope, standing records and threshold days for Plymouth 2 WSW (USC00336729), Ohio, United States, with 48 years of record.
Key Facts for Plymouth 2 WSW
Plymouth 2 WSW (USC00336729) is a weather station in Ohio, United States at 40.98 latitude and -82.70 longitude, 293 m (961 ft) above sea level.
The station reports from 1935 to 1982, 48 years of record.
1,464 records set at Plymouth 2 WSW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Plymouth 2 WSW set a daily record low maximum temperature of 12.2 C (54.0 F) on 23 September 1982.
About the Station
Location: Ohio, United States, 40.98 latitude, -82.70 longitude.
Elevation: 293 m (961 ft).
Period of record: 1935 to 1982, 48 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 Plymouth 2 WSW. 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 Plymouth 2 WSW, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
21.7 C (71.1 F)
-29.4 C (-20.9 F)
n/a
n/a
Feb
21.7 C (71.1 F)
-29.4 C (-20.9 F)
n/a
n/a
Mar
27.8 C (82.0 F)
-26.7 C (-16.1 F)
n/a
n/a
Apr
31.7 C (89.1 F)
-15.0 C (5.0 F)
n/a
n/a
May
35.6 C (96.1 F)
-5.0 C (23.0 F)
n/a
n/a
Jun
37.2 C (99.0 F)
1.1 C (34.0 F)
n/a
n/a
Jul
40.6 C (105.1 F)
2.2 C (36.0 F)
n/a
n/a
Aug
38.3 C (100.9 F)
2.2 C (36.0 F)
n/a
n/a
Sep
37.8 C (100.0 F)
-3.3 C (26.1 F)
n/a
n/a
Oct
32.8 C (91.0 F)
-9.4 C (15.1 F)
n/a
n/a
Nov
26.7 C (80.1 F)
-20.6 C (-5.1 F)
n/a
n/a
Dec
20.6 C (69.1 F)
-28.9 C (-20.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Plymouth 2 WSW still stand. 1936 holds the most, with 50.
Standing records at Plymouth 2 WSW by the year they were set
Year set
Standing records
1935
22
1936
50
1937
29
1938
26
1939
39
1940
44
1941
49
1942
34
1943
34
1944
28
1945
37
1946
31
1947
38
1948
24
1949
38
1950
37
1951
34
1952
35
1953
37
1954
37
1955
29
1956
22
1957
12
1958
20
1959
29
1960
31
1961
21
1962
8
1963
34
1964
24
1965
29
1966
24
1967
31
1968
16
1969
19
1970
18
1971
19
1972
22
1973
20
1974
19
1975
24
1976
45
1977
49
1978
49
1979
46
1980
42
1981
34
1982
25
All-Time Record Progression
3 new records
3 all-time records were set at Plymouth 2 WSW between 5 July 1969 and 11 January 1982. Each dot is a new record.
When Plymouth 2 WSW set new all-time records
Date
Kind
Detail
1969-07-05
Record daily precipitation
Record daily precipitation 127.0 mm (5.0 in)
1978-02-11
Record low minimum temperature
Record low minimum temperature -29.4 C (-20.9 F)
1982-01-11
Record low maximum temperature
Record low maximum temperature -19.4 C (-2.9 F)
Wettest Day of Each Month
Jul: 127.0 mm (5.0 in)
The wettest day on record for each calendar month at Plymouth 2 WSW. The most was 127.0 mm (5.0 in) on 5 July 1969.
Record daily precipitation for each month at Plymouth 2 WSW
Month
Record daily precipitation (mm)
Date
Jan
88.1 mm (3.5 in)
21 January 1959
Feb
64.5 mm (2.5 in)
10 February 1959
Mar
48.0 mm (1.9 in)
11 March 1952
Apr
49.3 mm (1.9 in)
21 April 1964
May
69.9 mm (2.8 in)
17 May 1945
Jun
90.9 mm (3.6 in)
17 June 1954
Jul
127.0 mm (5.0 in)
5 July 1969
Aug
85.3 mm (3.4 in)
7 August 1935
Sep
95.0 mm (3.7 in)
13 September 1936
Oct
59.2 mm (2.3 in)
7 October 1941
Nov
42.9 mm (1.7 in)
3 November 1966
Dec
48.3 mm (1.9 in)
28 December 1968
Period of Record Coverage
1935 to 1982
Complete yearUnder 90 percent of days
48 years of record at Plymouth 2 WSW, 1935 to 1982. 4 years have data for under 90 percent of days and are left out of rankings: 1935, 1962, 1970, 1982.
Cooler than the station meanWarmer than the station mean
One stripe for each of 41 complete years at Plymouth 2 WSW, 1936 to 1981. Blue stripes are years cooler than the station's own mean of 9.8 C (49.7 F); red stripes are warmer. The coolest year was 1978, at 6.8 C (44.3 F), and the warmest was 1949, at 11.7 C (53.0 F). The strongest colour marks a difference of 3.1 C (5.6 F).
Annual mean temperature at Plymouth 2 WSW as warming stripes, 1936 to 1981
Year
Annual mean temperature
Difference from the station mean
1936
10.0 C
+0.11 C
1937
9.7 C
-0.16 C
1938
11.2 C
+1.33 C
1939
10.9 C
+1.05 C
1940
8.9 C
-0.96 C
1941
10.8 C
+0.96 C
1942
10.2 C
+0.37 C
1943
9.6 C
-0.26 C
1944
10.5 C
+0.63 C
1945
9.9 C
+0.01 C
1946
11.1 C
+1.28 C
1947
9.9 C
+0.06 C
1948
10.4 C
+0.51 C
1949
11.7 C
+1.80 C
1950
9.6 C
-0.24 C
1951
10.0 C
+0.15 C
1952
10.9 C
+1.09 C
1953
11.5 C
+1.62 C
1954
11.2 C
+1.34 C
1955
11.0 C
+1.12 C
1956
10.4 C
+0.51 C
1957
10.1 C
+0.24 C
1958
8.9 C
-0.92 C
1959
10.8 C
+0.98 C
1960
10.1 C
+0.21 C
1964
10.2 C
+0.38 C
1965
10.1 C
+0.26 C
1966
9.5 C
-0.39 C
1967
9.5 C
-0.35 C
1968
9.3 C
-0.53 C
1969
8.9 C
-0.99 C
1971
10.0 C
+0.12 C
1972
9.4 C
-0.49 C
1973
10.9 C
+1.06 C
1974
9.4 C
-0.47 C
1975
10.1 C
+0.26 C
1977
8.4 C
-1.50 C
1978
6.8 C
-3.04 C
1979
7.6 C
-2.23 C
1980
7.1 C
-2.77 C
1981
7.7 C
-2.17 C
The annual mean temperature here has fallen by 0.5 C (0.3 to 0.7) per decade over 1936 to 1981. In Fahrenheit: 0.9 F (0.5 to 1.3) per decade. The slope is a straight line fitted to 41 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Plymouth 2 WSW
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.5 C (-0.7 to -0.3) per decade
-0.9 F (-1.3 to -0.5) per decade
1936 to 1981
41
Fall
Mean daily maximum
-0.4 C (-0.7 to -0.2) per decade
-0.8 F (-1.2 to -0.4) per decade
1936 to 1981
41
Fall
Mean daily minimum
-0.5 C (-0.8 to -0.3) per decade
-1.0 F (-1.4 to -0.5) per decade
1936 to 1981
41
Fall
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
1935 to 1982
Yearly extremes at Plymouth 2 WSW: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.6 C (105.1 F)
1936
35.0 C (95.0 F)
48
Coldest night (TNn)
-29.4 C (-20.9 F)
1978
-23.0 C (-9.5 F)
48
Wettest day (Rx1day)
127.0 mm (5.0 in)
1969
56.8 mm (2.2 in)
48
Wettest five days (Rx5day)
160.7 mm (6.3 in)
1954
83.9 mm (3.3 in)
48
Longest dry spell (CDD)
31 days
1963
17 days
48
Hottest day (TXx)
The hottest day of the year at Plymouth 2 WSW, 1935 to 1982. The record is 40.6 C (105.1 F) in 1936, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Plymouth 2 WSW by year
Year
Hottest day (TXx)
1935
36.1 C (97.0 F)
1936
40.6 C (105.1 F)
1937
34.4 C (93.9 F)
1938
34.4 C (93.9 F)
1939
37.8 C (100.0 F)
1940
35.0 C (95.0 F)
1941
37.8 C (100.0 F)
1942
36.7 C (98.1 F)
1943
36.1 C (97.0 F)
1944
36.7 C (98.1 F)
1945
33.9 C (93.0 F)
1946
35.6 C (96.1 F)
1947
35.6 C (96.1 F)
1948
36.7 C (98.1 F)
1949
36.1 C (97.0 F)
1950
33.3 C (91.9 F)
1951
36.1 C (97.0 F)
1952
37.2 C (99.0 F)
1953
37.8 C (100.0 F)
1954
36.1 C (97.0 F)
1955
36.7 C (98.1 F)
1956
34.4 C (93.9 F)
1957
33.9 C (93.0 F)
1958
32.2 C (90.0 F)
1959
35.0 C (95.0 F)
1960
32.2 C (90.0 F)
1961
33.3 C (91.9 F)
1962
32.8 C (91.0 F)
1963
33.9 C (93.0 F)
1964
34.4 C (93.9 F)
1965
36.7 C (98.1 F)
1966
34.4 C (93.9 F)
1967
33.9 C (93.0 F)
1968
33.3 C (91.9 F)
1969
35.6 C (96.1 F)
1970
32.2 C (90.0 F)
1971
36.7 C (98.1 F)
1972
33.9 C (93.0 F)
1973
36.1 C (97.0 F)
1974
33.9 C (93.0 F)
1975
36.1 C (97.0 F)
1976
33.9 C (93.0 F)
1977
35.0 C (95.0 F)
1978
34.4 C (93.9 F)
1979
31.7 C (89.1 F)
1980
35.0 C (95.0 F)
1981
33.3 C (91.9 F)
1982
31.7 C (89.1 F)
Coldest night (TNn)
The coldest night of the year at Plymouth 2 WSW, 1935 to 1982. The record is -29.4 C (-20.9 F) in 1978, marked on the chart; the median year is -23.0 C (-9.5 F).
Coldest night (TNn) at Plymouth 2 WSW by year
Year
Coldest night (TNn)
1935
-20.0 C (-4.0 F)
1936
-26.7 C (-16.1 F)
1937
-15.6 C (3.9 F)
1938
-17.8 C (0.0 F)
1939
-21.1 C (-6.0 F)
1940
-25.6 C (-14.1 F)
1941
-17.8 C (0.0 F)
1942
-23.3 C (-9.9 F)
1943
-23.3 C (-9.9 F)
1944
-22.8 C (-9.0 F)
1945
-20.6 C (-5.1 F)
1946
-20.6 C (-5.1 F)
1947
-21.1 C (-6.0 F)
1948
-21.7 C (-7.1 F)
1949
-18.3 C (-0.9 F)
1950
-25.0 C (-13.0 F)
1951
-25.0 C (-13.0 F)
1952
-16.1 C (3.0 F)
1953
-17.2 C (1.0 F)
1954
-17.8 C (0.0 F)
1955
-20.6 C (-5.1 F)
1956
-17.8 C (0.0 F)
1957
-22.2 C (-8.0 F)
1958
-24.4 C (-11.9 F)
1959
-22.8 C (-9.0 F)
1960
-22.8 C (-9.0 F)
1961
-23.3 C (-9.9 F)
1962
-21.1 C (-6.0 F)
1963
-28.9 C (-20.0 F)
1964
-21.1 C (-6.0 F)
1965
-22.8 C (-9.0 F)
1966
-24.4 C (-11.9 F)
1967
-23.3 C (-9.9 F)
1968
-25.0 C (-13.0 F)
1969
-21.7 C (-7.1 F)
1970
-25.6 C (-14.1 F)
1971
-23.3 C (-9.9 F)
1972
-24.4 C (-11.9 F)
1973
-23.3 C (-9.9 F)
1974
-20.6 C (-5.1 F)
1975
-24.4 C (-11.9 F)
1976
-28.9 C (-20.0 F)
1977
-28.9 C (-20.0 F)
1978
-29.4 C (-20.9 F)
1979
-28.9 C (-20.0 F)
1980
-25.6 C (-14.1 F)
1981
-29.4 C (-20.9 F)
1982
-28.3 C (-18.9 F)
Wettest day (Rx1day)
The wettest day of the year at Plymouth 2 WSW, 1935 to 1982. The record is 127.0 mm (5.0 in) in 1969, marked on the chart; the median year is 56.8 mm (2.2 in).
Wettest day (Rx1day) at Plymouth 2 WSW by year
Year
Wettest day (Rx1day)
1935
85.3 mm (3.4 in)
1936
95.0 mm (3.7 in)
1937
61.7 mm (2.4 in)
1938
58.4 mm (2.3 in)
1939
44.7 mm (1.8 in)
1940
55.1 mm (2.2 in)
1941
59.2 mm (2.3 in)
1942
48.0 mm (1.9 in)
1943
60.5 mm (2.4 in)
1944
53.8 mm (2.1 in)
1945
69.9 mm (2.8 in)
1946
60.5 mm (2.4 in)
1947
65.3 mm (2.6 in)
1948
70.9 mm (2.8 in)
1949
61.0 mm (2.4 in)
1950
55.9 mm (2.2 in)
1951
30.7 mm (1.2 in)
1952
48.0 mm (1.9 in)
1953
65.0 mm (2.6 in)
1954
90.9 mm (3.6 in)
1955
36.6 mm (1.4 in)
1956
56.6 mm (2.2 in)
1957
71.9 mm (2.8 in)
1958
98.6 mm (3.9 in)
1959
88.1 mm (3.5 in)
1960
64.3 mm (2.5 in)
1961
38.6 mm (1.5 in)
1962
63.2 mm (2.5 in)
1963
35.6 mm (1.4 in)
1964
50.0 mm (2.0 in)
1965
34.3 mm (1.4 in)
1966
51.3 mm (2.0 in)
1967
38.1 mm (1.5 in)
1968
56.4 mm (2.2 in)
1969
127.0 mm (5.0 in)
1970
27.9 mm (1.1 in)
1971
48.3 mm (1.9 in)
1972
68.3 mm (2.7 in)
1973
31.8 mm (1.3 in)
1974
63.5 mm (2.5 in)
1975
39.4 mm (1.6 in)
1976
56.9 mm (2.2 in)
1977
43.4 mm (1.7 in)
1978
30.2 mm (1.2 in)
1979
66.0 mm (2.6 in)
1980
41.4 mm (1.6 in)
1981
69.1 mm (2.7 in)
1982
42.9 mm (1.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at Plymouth 2 WSW, 1935 to 1982. The record is 160.7 mm (6.3 in) in 1954, marked on the chart; the median year is 83.9 mm (3.3 in).
Wettest five days (Rx5day) at Plymouth 2 WSW by year
Year
Wettest five days (Rx5day)
1935
102.1 mm (4.0 in)
1936
114.6 mm (4.5 in)
1937
116.4 mm (4.6 in)
1938
80.0 mm (3.1 in)
1939
57.4 mm (2.3 in)
1940
84.2 mm (3.3 in)
1941
95.0 mm (3.7 in)
1942
89.4 mm (3.5 in)
1943
81.8 mm (3.2 in)
1944
74.4 mm (2.9 in)
1945
97.0 mm (3.8 in)
1946
106.7 mm (4.2 in)
1947
80.3 mm (3.2 in)
1948
71.9 mm (2.8 in)
1949
86.5 mm (3.4 in)
1950
83.5 mm (3.3 in)
1951
56.1 mm (2.2 in)
1952
61.9 mm (2.4 in)
1953
84.6 mm (3.3 in)
1954
160.7 mm (6.3 in)
1955
50.3 mm (2.0 in)
1956
78.7 mm (3.1 in)
1957
97.5 mm (3.8 in)
1958
109.1 mm (4.3 in)
1959
101.3 mm (4.0 in)
1960
121.2 mm (4.8 in)
1961
59.4 mm (2.3 in)
1962
93.7 mm (3.7 in)
1963
85.7 mm (3.4 in)
1964
108.7 mm (4.3 in)
1965
60.0 mm (2.4 in)
1966
95.2 mm (3.7 in)
1967
62.3 mm (2.5 in)
1968
102.4 mm (4.0 in)
1969
140.0 mm (5.5 in)
1970
69.6 mm (2.7 in)
1971
50.6 mm (2.0 in)
1972
115.8 mm (4.6 in)
1973
71.8 mm (2.8 in)
1974
92.7 mm (3.6 in)
1975
58.6 mm (2.3 in)
1976
60.5 mm (2.4 in)
1977
80.0 mm (3.1 in)
1978
45.5 mm (1.8 in)
1979
68.1 mm (2.7 in)
1980
54.4 mm (2.1 in)
1981
121.2 mm (4.8 in)
1982
60.9 mm (2.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Plymouth 2 WSW, 1935 to 1982. The record is 31 days in 1963, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Plymouth 2 WSW by year
Year
Longest dry spell (CDD)
1935
17 days
1936
22 days
1937
13 days
1938
26 days
1939
21 days
1940
15 days
1941
21 days
1942
20 days
1943
19 days
1944
17 days
1945
24 days
1946
13 days
1947
12 days
1948
18 days
1949
15 days
1950
12 days
1951
15 days
1952
18 days
1953
26 days
1954
17 days
1955
14 days
1956
13 days
1957
23 days
1958
17 days
1959
16 days
1960
13 days
1961
14 days
1962
16 days
1963
31 days
1964
20 days
1965
14 days
1966
15 days
1967
25 days
1968
14 days
1969
15 days
1970
22 days
1971
14 days
1972
13 days
1973
15 days
1974
10 days
1975
20 days
1976
14 days
1977
18 days
1978
19 days
1979
14 days
1980
17 days
1981
24 days
1982
15 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
41 years with a frost
Across 41 years with a frost, the median last spring frost at Plymouth 2 WSW falls on 8 May and the median first autumn frost on 6 October, which leaves a median of 155 days between them.
Fitted over all years, the growing season changes by -2.0 days per decade at this station.
Frost dates and growing season at Plymouth 2 WSW
Measure
Median, all years
Earliest period
Recent period (1947 to 1981)
Recent against earliest
Fitted trend
Last spring frost
8 May
n/a
8 May
n/a
+2.0 days per decade
First autumn frost
6 October
n/a
8 October
n/a
0.0 days per decade
Growing days
155 days
n/a
159 days
n/a
-2.0 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
45 years, 1936 to 1981
A day with at least 54.6 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 117.5 mm (4.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Plymouth 2 WSW: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
54.6 mm (2.1 in)
5 years
72.2 mm (2.8 in)
10 years
83.6 mm (3.3 in)
25 years
97.6 mm (3.8 in)
50 years
107.7 mm (4.2 in)
Longer than the 45 years of record
100 years
117.5 mm (4.6 in)
Longer than the 45 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, 45 years of values from 1936 to 1981.
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: 127.0 mm (5.0 in) in 1969; 98.6 mm (3.9 in) in 1958; 95.0 mm (3.7 in) in 1936.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Plymouth 2 WSW, at 1977. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1977 ran 1.3 C (2.3 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Plymouth 2 WSW, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1977
-1.3
-2.3
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 Plymouth 2 WSW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Plymouth 2 WSW 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.