Record envelope, standing records and threshold days for Dover (USC00332270), Ohio, United States, with 45 years of record.
Key Facts for Dover
Dover (USC00332270) is a weather station in Ohio, United States at 40.53 latitude and -81.48 longitude, 269 m (884 ft) above sea level.
The station reports from 1893 to 1937, 45 years of record.
1,464 records set at Dover still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Dover set a daily record precipitation of 45.7 mm (1.8 in) on 20 June 1937.
About the Station
Location: Ohio, United States, 40.53 latitude, -81.48 longitude.
Elevation: 269 m (884 ft).
Period of record: 1893 to 1937, 45 years.
Eligible elements: tmax, tmin, prcp.
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 Dover. 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 Dover, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
22.2 C (72.0 F)
-31.1 C (-24.0 F)
n/a
n/a
Feb
22.2 C (72.0 F)
-31.7 C (-25.1 F)
n/a
n/a
Mar
29.4 C (84.9 F)
-23.9 C (-11.0 F)
n/a
n/a
Apr
33.9 C (93.0 F)
-14.4 C (6.1 F)
n/a
n/a
May
36.1 C (97.0 F)
-3.9 C (25.0 F)
n/a
n/a
Jun
39.4 C (102.9 F)
-2.2 C (28.0 F)
n/a
n/a
Jul
40.6 C (105.1 F)
0.6 C (33.1 F)
n/a
n/a
Aug
37.8 C (100.0 F)
0.0 C (32.0 F)
n/a
n/a
Sep
38.3 C (100.9 F)
-2.8 C (27.0 F)
n/a
n/a
Oct
31.7 C (89.1 F)
-11.1 C (12.0 F)
n/a
n/a
Nov
26.1 C (79.0 F)
-17.8 C (0.0 F)
n/a
n/a
Dec
20.0 C (68.0 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 Dover still stand. 1895 holds the most, with 49.
Standing records at Dover by the year they were set
Year set
Standing records
1893
19
1894
38
1895
49
1896
45
1897
46
1898
30
1899
33
1900
38
1901
29
1902
26
1903
45
1904
26
1905
15
1906
36
1907
25
1908
26
1909
27
1910
28
1911
36
1912
22
1913
7
1914
31
1915
13
1916
45
1917
41
1918
40
1919
24
1920
28
1921
41
1922
21
1923
31
1924
43
1925
39
1926
43
1927
39
1928
30
1929
36
1930
47
1931
40
1932
34
1933
47
1934
38
1935
29
1936
36
1937
2
All-Time Record Progression
3 new records
3 all-time records were set at Dover between 20 July 1930 and 23 July 1933. Each dot is a new record.
When Dover set new all-time records
Date
Kind
Detail
1930-07-20
Record high minimum temperature
Record high minimum temperature 25.6 C (78.1 F)
1933-06-08
Record high maximum temperature
Record high maximum temperature 39.4 C (102.9 F)
1933-07-23
Record high maximum temperature
Record high maximum temperature 40.6 C (105.1 F)
Wettest Day of Each Month
Sep: 92.2 mm (3.6 in)
The wettest day on record for each calendar month at Dover. The most was 92.2 mm (3.6 in) on 24 September 1926.
Record daily precipitation for each month at Dover
Month
Record daily precipitation (mm)
Date
Jan
41.1 mm (1.6 in)
11 January 1924
Feb
50.8 mm (2.0 in)
6 February 1897
Mar
68.6 mm (2.7 in)
25 March 1913
Apr
53.3 mm (2.1 in)
20 April 1901
May
52.1 mm (2.1 in)
14 May 1905
Jun
50.8 mm (2.0 in)
22 June 1905
Jul
91.4 mm (3.6 in)
16 July 1919
Aug
75.7 mm (3.0 in)
14 August 1905
Sep
92.2 mm (3.6 in)
24 September 1926
Oct
59.9 mm (2.4 in)
14 October 1893
Nov
45.7 mm (1.8 in)
17 November 1927
Dec
50.8 mm (2.0 in)
30 December 1915
Period of Record Coverage
1893 to 1937
Complete yearUnder 90 percent of days
45 years of record at Dover, 1893 to 1937. 7 years have data for under 90 percent of days and are left out of rankings: 1893, 1895, 1913, 1914, 1915, 1930, 1937.
Cooler than the station meanWarmer than the station mean
One stripe for each of 33 complete years at Dover, 1896 to 1935. Blue stripes are years cooler than the station's own mean of 10.1 C (50.1 F); red stripes are warmer. The coolest year was 1917, at 8.1 C (46.6 F), and the warmest was 1931, at 12.4 C (54.4 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Dover as warming stripes, 1896 to 1935
Year
Annual mean temperature
Difference from the station mean
1896
10.4 C
+0.37 C
1897
10.1 C
+0.07 C
1898
10.7 C
+0.66 C
1899
10.5 C
+0.49 C
1900
10.8 C
+0.72 C
1901
9.8 C
-0.26 C
1902
9.8 C
-0.25 C
1903
9.8 C
-0.26 C
1904
8.7 C
-1.34 C
1905
9.2 C
-0.83 C
1906
10.3 C
+0.21 C
1908
10.5 C
+0.44 C
1909
9.8 C
-0.29 C
1910
9.7 C
-0.37 C
1911
11.1 C
+1.00 C
1912
9.5 C
-0.59 C
1916
9.4 C
-0.61 C
1917
8.1 C
-1.96 C
1918
9.6 C
-0.42 C
1920
8.8 C
-1.21 C
1921
11.2 C
+1.14 C
1922
10.0 C
-0.02 C
1923
9.9 C
-0.13 C
1924
8.7 C
-1.37 C
1925
9.8 C
-0.23 C
1926
9.1 C
-0.96 C
1927
10.4 C
+0.35 C
1928
9.9 C
-0.16 C
1931
12.4 C
+2.37 C
1932
11.1 C
+1.02 C
1933
11.5 C
+1.49 C
1934
10.8 C
+0.76 C
1935
10.2 C
+0.17 C
The fitted trend in annual mean temperature here over 1896 to 1935 is 0.1 C (-0.1 to 0.4) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.2 to 0.7) per decade. The slope is a straight line fitted to 33 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Dover
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.1 to 0.4) per decade
0.2 F (-0.2 to 0.7) per decade
1896 to 1935
33
Not clearly different from zero
Mean daily maximum
0.3 C (-0.1 to 0.7) per decade
0.5 F (-0.2 to 1.2) per decade
1896 to 1935
33
Not clearly different from zero
Mean daily minimum
-0.03 C (-0.26 to 0.21) per decade
-0.1 F (-0.5 to 0.4) per decade
1896 to 1935
33
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
1893 to 1937
Yearly extremes at Dover: 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)
1933
35.6 C (96.1 F)
45
Coldest night (TNn)
-31.7 C (-25.1 F)
1899
-22.2 C (-8.0 F)
45
Wettest day (Rx1day)
92.2 mm (3.6 in)
1926
48.5 mm (1.9 in)
45
Wettest five days (Rx5day)
158.8 mm (6.3 in)
1935
65.0 mm (2.6 in)
43
Longest dry spell (CDD)
24 days
1904
12 days
45
Hottest day (TXx)
The hottest day of the year at Dover, 1893 to 1937. The record is 40.6 C (105.1 F) in 1933, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Dover by year
Year
Hottest day (TXx)
1893
33.3 C (91.9 F)
1894
37.8 C (100.0 F)
1895
37.2 C (99.0 F)
1896
34.4 C (93.9 F)
1897
37.8 C (100.0 F)
1898
36.7 C (98.1 F)
1899
36.7 C (98.1 F)
1900
36.1 C (97.0 F)
1901
38.9 C (102.0 F)
1902
35.0 C (95.0 F)
1903
35.0 C (95.0 F)
1904
33.9 C (93.0 F)
1905
33.9 C (93.0 F)
1906
34.4 C (93.9 F)
1907
33.3 C (91.9 F)
1908
35.0 C (95.0 F)
1909
33.3 C (91.9 F)
1910
35.0 C (95.0 F)
1911
38.3 C (100.9 F)
1912
33.3 C (91.9 F)
1913
28.9 C (84.0 F)
1914
36.7 C (98.1 F)
1915
33.9 C (93.0 F)
1916
33.9 C (93.0 F)
1917
33.3 C (91.9 F)
1918
37.2 C (99.0 F)
1919
33.9 C (93.0 F)
1920
31.7 C (89.1 F)
1921
35.0 C (95.0 F)
1922
35.0 C (95.0 F)
1923
36.1 C (97.0 F)
1924
36.7 C (98.1 F)
1925
37.8 C (100.0 F)
1926
38.3 C (100.9 F)
1927
36.1 C (97.0 F)
1928
36.7 C (98.1 F)
1929
35.6 C (96.1 F)
1930
38.9 C (102.0 F)
1931
38.9 C (102.0 F)
1932
38.3 C (100.9 F)
1933
40.6 C (105.1 F)
1934
39.4 C (102.9 F)
1935
33.3 C (91.9 F)
1936
40.6 C (105.1 F)
1937
32.8 C (91.0 F)
Coldest night (TNn)
The coldest night of the year at Dover, 1893 to 1937. The record is -31.7 C (-25.1 F) in 1899, marked on the chart; the median year is -22.2 C (-8.0 F).
Coldest night (TNn) at Dover by year
Year
Coldest night (TNn)
1893
-16.1 C (3.0 F)
1894
-21.7 C (-7.1 F)
1895
-23.3 C (-9.9 F)
1896
-20.0 C (-4.0 F)
1897
-29.4 C (-20.9 F)
1898
-22.2 C (-8.0 F)
1899
-31.7 C (-25.1 F)
1900
-21.7 C (-7.1 F)
1901
-26.1 C (-15.0 F)
1902
-23.3 C (-9.9 F)
1903
-24.4 C (-11.9 F)
1904
-31.1 C (-24.0 F)
1905
-28.9 C (-20.0 F)
1906
-25.6 C (-14.1 F)
1907
-28.9 C (-20.0 F)
1908
-17.2 C (1.0 F)
1909
-28.3 C (-18.9 F)
1910
-28.3 C (-18.9 F)
1911
-25.6 C (-14.1 F)
1912
-30.6 C (-23.1 F)
1913
-17.8 C (0.0 F)
1914
-22.2 C (-8.0 F)
1915
-22.2 C (-8.0 F)
1916
-19.4 C (-2.9 F)
1917
-25.6 C (-14.1 F)
1918
-27.2 C (-17.0 F)
1919
-16.1 C (3.0 F)
1920
-17.8 C (0.0 F)
1921
-12.8 C (9.0 F)
1922
-20.0 C (-4.0 F)
1923
-16.1 C (3.0 F)
1924
-24.4 C (-11.9 F)
1925
-23.9 C (-11.0 F)
1926
-23.9 C (-11.0 F)
1927
-18.3 C (-0.9 F)
1928
-19.4 C (-2.9 F)
1929
-22.8 C (-9.0 F)
1930
-15.6 C (3.9 F)
1931
-13.3 C (8.1 F)
1932
-17.8 C (0.0 F)
1933
-21.7 C (-7.1 F)
1934
-27.2 C (-17.0 F)
1935
-20.0 C (-4.0 F)
1936
-25.6 C (-14.1 F)
1937
-12.2 C (10.0 F)
Wettest day (Rx1day)
The wettest day of the year at Dover, 1893 to 1937. The record is 92.2 mm (3.6 in) in 1926, marked on the chart; the median year is 48.5 mm (1.9 in).
Wettest day (Rx1day) at Dover by year
Year
Wettest day (Rx1day)
1893
59.9 mm (2.4 in)
1894
50.8 mm (2.0 in)
1895
54.9 mm (2.2 in)
1896
55.9 mm (2.2 in)
1897
50.8 mm (2.0 in)
1898
64.5 mm (2.5 in)
1899
48.5 mm (1.9 in)
1900
44.5 mm (1.8 in)
1901
53.3 mm (2.1 in)
1902
45.7 mm (1.8 in)
1903
30.7 mm (1.2 in)
1904
63.5 mm (2.5 in)
1905
75.7 mm (3.0 in)
1906
30.5 mm (1.2 in)
1907
49.0 mm (1.9 in)
1908
33.3 mm (1.3 in)
1909
61.0 mm (2.4 in)
1910
36.1 mm (1.4 in)
1911
74.9 mm (2.9 in)
1912
54.4 mm (2.1 in)
1913
68.6 mm (2.7 in)
1914
46.5 mm (1.8 in)
1915
50.8 mm (2.0 in)
1916
40.6 mm (1.6 in)
1917
38.6 mm (1.5 in)
1918
54.6 mm (2.1 in)
1919
91.4 mm (3.6 in)
1920
47.2 mm (1.9 in)
1921
45.7 mm (1.8 in)
1922
43.2 mm (1.7 in)
1923
41.1 mm (1.6 in)
1924
48.8 mm (1.9 in)
1925
43.7 mm (1.7 in)
1926
92.2 mm (3.6 in)
1927
53.3 mm (2.1 in)
1928
44.5 mm (1.8 in)
1929
43.2 mm (1.7 in)
1930
31.8 mm (1.3 in)
1931
47.0 mm (1.9 in)
1932
35.6 mm (1.4 in)
1933
41.1 mm (1.6 in)
1934
45.7 mm (1.8 in)
1935
71.4 mm (2.8 in)
1936
56.6 mm (2.2 in)
1937
45.7 mm (1.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Dover, 1893 to 1937. The record is 158.8 mm (6.3 in) in 1935, marked on the chart; the median year is 65.0 mm (2.6 in).
Wettest five days (Rx5day) at Dover by year
Year
Wettest five days (Rx5day)
1893
53.9 mm (2.1 in)
1894
n/a
1895
n/a
1896
78.0 mm (3.1 in)
1897
60.0 mm (2.4 in)
1898
155.2 mm (6.1 in)
1899
92.7 mm (3.6 in)
1900
64.6 mm (2.5 in)
1901
90.2 mm (3.6 in)
1902
58.1 mm (2.3 in)
1903
61.4 mm (2.4 in)
1904
100.8 mm (4.0 in)
1905
137.7 mm (5.4 in)
1906
52.0 mm (2.0 in)
1907
73.2 mm (2.9 in)
1908
49.2 mm (1.9 in)
1909
65.0 mm (2.6 in)
1910
58.7 mm (2.3 in)
1911
101.3 mm (4.0 in)
1912
78.0 mm (3.1 in)
1913
145.3 mm (5.7 in)
1914
61.8 mm (2.4 in)
1915
73.7 mm (2.9 in)
1916
99.1 mm (3.9 in)
1917
49.8 mm (2.0 in)
1918
41.3 mm (1.6 in)
1919
129.0 mm (5.1 in)
1920
74.1 mm (2.9 in)
1921
59.7 mm (2.4 in)
1922
55.7 mm (2.2 in)
1923
45.8 mm (1.8 in)
1924
76.8 mm (3.0 in)
1925
60.2 mm (2.4 in)
1926
116.1 mm (4.6 in)
1927
83.5 mm (3.3 in)
1928
102.9 mm (4.1 in)
1929
52.9 mm (2.1 in)
1930
48.3 mm (1.9 in)
1931
60.0 mm (2.4 in)
1932
45.9 mm (1.8 in)
1933
70.8 mm (2.8 in)
1934
54.6 mm (2.1 in)
1935
158.8 mm (6.3 in)
1936
103.1 mm (4.1 in)
1937
13.5 mm (0.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Dover, 1893 to 1937. The record is 24 days in 1904, marked on the chart; the median year is 12 days.
Longest dry spell (CDD) at Dover by year
Year
Longest dry spell (CDD)
1893
15 days
1894
3 days
1895
2 days
1896
3 days
1897
2 days
1898
10 days
1899
21 days
1900
17 days
1901
21 days
1902
14 days
1903
20 days
1904
24 days
1905
15 days
1906
11 days
1907
15 days
1908
21 days
1909
13 days
1910
14 days
1911
14 days
1912
16 days
1913
6 days
1914
18 days
1915
21 days
1916
14 days
1917
22 days
1918
9 days
1919
10 days
1920
8 days
1921
8 days
1922
10 days
1923
9 days
1924
23 days
1925
10 days
1926
12 days
1927
3 days
1928
10 days
1929
8 days
1930
9 days
1931
3 days
1932
12 days
1933
16 days
1934
18 days
1935
12 days
1936
17 days
1937
11 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
33 years with a frost
Across 33 years with a frost, the median last spring frost at Dover falls on 10 May and the median first autumn frost on 4 October, which leaves a median of 145 days between them.
Fitted over all years, the growing season changes by -8.2 days per decade at this station.
Frost dates and growing season at Dover
Measure
Median, all years
Earliest period
Recent period (1899 to 1935)
Recent against earliest
Fitted trend
Last spring frost
10 May
n/a
10 May
n/a
+5.9 days per decade
First autumn frost
4 October
n/a
6 October
n/a
-2.3 days per decade
Growing days
145 days
n/a
145 days
n/a
-8.2 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.
Download the Data
Data for Dover standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Dover 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.