Record envelope, standing records and threshold days for Dover (USC00282340), New Jersey, United States, with 51 years of record.
Key Facts for Dover
Dover (USC00282340) is a weather station in New Jersey, United States at 40.88 latitude and -74.57 longitude, 175 m (575 ft) above sea level.
The station reports from 1893 to 1943, 51 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 tied a daily record low minimum temperature of -15.6 C (3.9 F) on 24 December 1943.
About the Station
Location: New Jersey, United States, 40.88 latitude, -74.57 longitude.
Elevation: 175 m (575 ft).
Period of record: 1893 to 1943, 51 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
20.6 C (69.1 F)
-29.4 C (-20.9 F)
n/a
n/a
Feb
22.8 C (73.0 F)
-28.3 C (-18.9 F)
n/a
n/a
Mar
28.3 C (82.9 F)
-20.6 C (-5.1 F)
n/a
n/a
Apr
33.9 C (93.0 F)
-13.3 C (8.1 F)
n/a
n/a
May
37.2 C (99.0 F)
-2.8 C (27.0 F)
n/a
n/a
Jun
37.8 C (100.0 F)
2.2 C (36.0 F)
n/a
n/a
Jul
39.4 C (102.9 F)
1.7 C (35.1 F)
n/a
n/a
Aug
38.3 C (100.9 F)
3.9 C (39.0 F)
n/a
n/a
Sep
37.2 C (99.0 F)
-2.2 C (28.0 F)
n/a
n/a
Oct
31.7 C (89.1 F)
-9.4 C (15.1 F)
n/a
n/a
Nov
26.1 C (79.0 F)
-15.0 C (5.0 F)
n/a
n/a
Dec
17.8 C (64.0 F)
-25.6 C (-14.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Dover still stand. 1896 holds the most, with 67.
Standing records at Dover by the year they were set
Year set
Standing records
1893
28
1894
29
1895
53
1896
67
1897
26
1898
36
1899
37
1900
37
1901
27
1902
26
1903
56
1904
37
1905
31
1906
33
1907
30
1908
25
1909
37
1910
23
1911
25
1912
25
1913
31
1914
33
1915
28
1916
33
1917
34
1918
31
1919
20
1920
16
1921
22
1922
13
1923
27
1924
14
1925
30
1926
31
1927
27
1928
27
1929
39
1930
31
1931
20
1932
26
1933
28
1934
26
1935
19
1936
32
1937
17
1938
24
1939
16
1940
24
1941
15
1942
21
1943
21
All-Time Record Progression
1 new records
1 all-time records were set at Dover between 29 December 1933 and 29 December 1933. Each dot is a new record.
When Dover set new all-time records
Date
Kind
Detail
1933-12-29
Record low maximum temperature
Record low maximum temperature -18.9 C (-2.0 F)
Wettest Day of Each Month
Jun: 146.1 mm (5.8 in)
The wettest day on record for each calendar month at Dover. The most was 146.1 mm (5.8 in) on 12 June 1903.
Record daily precipitation for each month at Dover
Month
Record daily precipitation (mm)
Date
Jan
73.7 mm (2.9 in)
22 January 1902
Feb
105.7 mm (4.2 in)
6 February 1896
Mar
71.9 mm (2.8 in)
15 March 1940
Apr
85.1 mm (3.4 in)
7 April 1924
May
82.6 mm (3.3 in)
2 May 1897
Jun
146.1 mm (5.8 in)
12 June 1903
Jul
132.1 mm (5.2 in)
6 July 1901
Aug
101.6 mm (4.0 in)
17 August 1909
Sep
142.2 mm (5.6 in)
15 September 1904
Oct
139.7 mm (5.5 in)
9 October 1903
Nov
98.8 mm (3.9 in)
13 November 1937
Dec
83.8 mm (3.3 in)
13 December 1909
Period of Record Coverage
1893 to 1943
Complete yearUnder 90 percent of days
51 years of record at Dover, 1893 to 1943. 2 years have data for under 90 percent of days and are left out of rankings: 1925, 1942.
Cooler than the station meanWarmer than the station mean
One stripe for each of 45 complete years at Dover, 1893 to 1943. Blue stripes are years cooler than the station's own mean of 9.5 C (49.1 F); red stripes are warmer. The coolest year was 1904, at 7.2 C (45.0 F), and the warmest was 1900, at 10.9 C (51.6 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Dover as warming stripes, 1893 to 1943
Year
Annual mean temperature
Difference from the station mean
1893
8.7 C
-0.82 C
1894
10.2 C
+0.65 C
1895
9.6 C
+0.10 C
1896
9.8 C
+0.23 C
1897
10.1 C
+0.57 C
1898
10.6 C
+1.06 C
1900
10.9 C
+1.34 C
1902
9.3 C
-0.27 C
1903
8.9 C
-0.59 C
1904
7.2 C
-2.30 C
1905
8.6 C
-0.89 C
1906
9.5 C
-0.08 C
1907
8.2 C
-1.32 C
1908
9.3 C
-0.19 C
1909
9.1 C
-0.41 C
1910
9.0 C
-0.50 C
1911
9.3 C
-0.20 C
1912
8.8 C
-0.70 C
1913
10.3 C
+0.74 C
1914
8.6 C
-0.91 C
1915
9.6 C
+0.10 C
1916
9.0 C
-0.55 C
1917
8.1 C
-1.39 C
1918
9.5 C
-0.07 C
1919
9.8 C
+0.23 C
1920
9.3 C
-0.28 C
1921
10.8 C
+1.26 C
1922
10.2 C
+0.66 C
1923
9.7 C
+0.18 C
1924
9.0 C
-0.56 C
1926
8.6 C
-0.91 C
1927
9.9 C
+0.33 C
1928
10.0 C
+0.44 C
1929
10.2 C
+0.69 C
1930
10.2 C
+0.66 C
1932
10.7 C
+1.13 C
1933
10.2 C
+0.70 C
1934
9.6 C
+0.05 C
1935
9.7 C
+0.16 C
1936
9.8 C
+0.23 C
1937
10.2 C
+0.66 C
1938
10.4 C
+0.88 C
1939
10.2 C
+0.64 C
1940
8.6 C
-0.92 C
1943
9.5 C
-0.03 C
The fitted trend in annual mean temperature here over 1893 to 1943 is 0.12 C (-0.04 to 0.28) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.1 to 0.5) per decade. The slope is a straight line fitted to 45 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
0.12 C (-0.04 to 0.28) per decade
0.2 F (-0.1 to 0.5) per decade
1893 to 1943
45
Not clearly different from zero
Mean daily maximum
0.1 C (-0.1 to 0.3) per decade
0.1 F (-0.2 to 0.5) per decade
1893 to 1943
45
Not clearly different from zero
Mean daily minimum
0.17 C (0.02 to 0.32) per decade
0.31 F (0.04 to 0.58) per decade
1893 to 1943
45
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
1893 to 1943
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)
39.4 C (102.9 F)
1901
35.0 C (95.0 F)
51
Coldest night (TNn)
-29.4 C (-20.9 F)
1912
-20.6 C (-5.1 F)
51
Wettest day (Rx1day)
146.1 mm (5.8 in)
1903
79.2 mm (3.1 in)
51
Wettest five days (Rx5day)
257.3 mm (10.1 in)
1903
114.1 mm (4.5 in)
51
Longest dry spell (CDD)
34 days
1924
16 days
51
Hottest day (TXx)
The hottest day of the year at Dover, 1893 to 1943. The record is 39.4 C (102.9 F) in 1901, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Dover by year
Year
Hottest day (TXx)
1893
36.7 C (98.1 F)
1894
36.1 C (97.0 F)
1895
37.2 C (99.0 F)
1896
38.3 C (100.9 F)
1897
37.8 C (100.0 F)
1898
38.9 C (102.0 F)
1899
37.8 C (100.0 F)
1900
36.7 C (98.1 F)
1901
39.4 C (102.9 F)
1902
34.4 C (93.9 F)
1903
36.1 C (97.0 F)
1904
33.3 C (91.9 F)
1905
35.0 C (95.0 F)
1906
33.9 C (93.0 F)
1907
34.4 C (93.9 F)
1908
36.7 C (98.1 F)
1909
34.4 C (93.9 F)
1910
35.0 C (95.0 F)
1911
38.9 C (102.0 F)
1912
36.1 C (97.0 F)
1913
35.0 C (95.0 F)
1914
34.4 C (93.9 F)
1915
33.9 C (93.0 F)
1916
35.6 C (96.1 F)
1917
35.6 C (96.1 F)
1918
37.8 C (100.0 F)
1919
35.6 C (96.1 F)
1920
33.9 C (93.0 F)
1921
33.3 C (91.9 F)
1922
33.9 C (93.0 F)
1923
36.7 C (98.1 F)
1924
35.0 C (95.0 F)
1925
37.2 C (99.0 F)
1926
36.7 C (98.1 F)
1927
35.0 C (95.0 F)
1928
35.0 C (95.0 F)
1929
37.2 C (99.0 F)
1930
37.8 C (100.0 F)
1931
35.0 C (95.0 F)
1932
34.4 C (93.9 F)
1933
37.8 C (100.0 F)
1934
36.7 C (98.1 F)
1935
33.9 C (93.0 F)
1936
38.9 C (102.0 F)
1937
34.4 C (93.9 F)
1938
31.7 C (89.1 F)
1939
33.3 C (91.9 F)
1940
34.4 C (93.9 F)
1941
35.0 C (95.0 F)
1942
33.3 C (91.9 F)
1943
34.4 C (93.9 F)
Coldest night (TNn)
The coldest night of the year at Dover, 1893 to 1943. The record is -29.4 C (-20.9 F) in 1912, marked on the chart; the median year is -20.6 C (-5.1 F).
Coldest night (TNn) at Dover by year
Year
Coldest night (TNn)
1893
-25.0 C (-13.0 F)
1894
-20.6 C (-5.1 F)
1895
-21.1 C (-6.0 F)
1896
-22.2 C (-8.0 F)
1897
-18.3 C (-0.9 F)
1898
-20.0 C (-4.0 F)
1899
-23.3 C (-9.9 F)
1900
-21.1 C (-6.0 F)
1901
-18.3 C (-0.9 F)
1902
-17.8 C (0.0 F)
1903
-19.4 C (-2.9 F)
1904
-24.4 C (-11.9 F)
1905
-21.1 C (-6.0 F)
1906
-18.3 C (-0.9 F)
1907
-21.1 C (-6.0 F)
1908
-20.0 C (-4.0 F)
1909
-19.4 C (-2.9 F)
1910
-18.9 C (-2.0 F)
1911
-15.0 C (5.0 F)
1912
-29.4 C (-20.9 F)
1913
-15.0 C (5.0 F)
1914
-22.2 C (-8.0 F)
1915
-14.4 C (6.1 F)
1916
-21.7 C (-7.1 F)
1917
-25.6 C (-14.1 F)
1918
-24.4 C (-11.9 F)
1919
-22.2 C (-8.0 F)
1920
-21.7 C (-7.1 F)
1921
-20.6 C (-5.1 F)
1922
-20.6 C (-5.1 F)
1923
-18.3 C (-0.9 F)
1924
-17.2 C (1.0 F)
1925
-22.2 C (-8.0 F)
1926
-18.3 C (-0.9 F)
1927
-20.0 C (-4.0 F)
1928
-17.2 C (1.0 F)
1929
-17.8 C (0.0 F)
1930
-18.3 C (-0.9 F)
1931
-16.1 C (3.0 F)
1932
-17.8 C (0.0 F)
1933
-22.2 C (-8.0 F)
1934
-28.3 C (-18.9 F)
1935
-21.7 C (-7.1 F)
1936
-21.7 C (-7.1 F)
1937
-12.8 C (9.0 F)
1938
-21.7 C (-7.1 F)
1939
-16.7 C (1.9 F)
1940
-16.1 C (3.0 F)
1941
-15.0 C (5.0 F)
1942
-23.9 C (-11.0 F)
1943
-26.1 C (-15.0 F)
Wettest day (Rx1day)
The wettest day of the year at Dover, 1893 to 1943. The record is 146.1 mm (5.8 in) in 1903, marked on the chart; the median year is 79.2 mm (3.1 in).
Wettest day (Rx1day) at Dover by year
Year
Wettest day (Rx1day)
1893
90.2 mm (3.6 in)
1894
96.5 mm (3.8 in)
1895
105.7 mm (4.2 in)
1896
105.7 mm (4.2 in)
1897
104.4 mm (4.1 in)
1898
43.7 mm (1.7 in)
1899
41.9 mm (1.6 in)
1900
59.9 mm (2.4 in)
1901
132.1 mm (5.2 in)
1902
76.2 mm (3.0 in)
1903
146.1 mm (5.8 in)
1904
142.2 mm (5.6 in)
1905
101.6 mm (4.0 in)
1906
68.6 mm (2.7 in)
1907
108.0 mm (4.3 in)
1908
94.0 mm (3.7 in)
1909
101.6 mm (4.0 in)
1910
92.7 mm (3.6 in)
1911
68.6 mm (2.7 in)
1912
107.2 mm (4.2 in)
1913
77.7 mm (3.1 in)
1914
71.1 mm (2.8 in)
1915
79.2 mm (3.1 in)
1916
64.0 mm (2.5 in)
1917
43.2 mm (1.7 in)
1918
50.8 mm (2.0 in)
1919
80.0 mm (3.1 in)
1920
70.6 mm (2.8 in)
1921
53.6 mm (2.1 in)
1922
91.7 mm (3.6 in)
1923
70.4 mm (2.8 in)
1924
85.1 mm (3.4 in)
1925
64.8 mm (2.6 in)
1926
75.4 mm (3.0 in)
1927
82.6 mm (3.3 in)
1928
56.9 mm (2.2 in)
1929
68.3 mm (2.7 in)
1930
89.2 mm (3.5 in)
1931
110.5 mm (4.4 in)
1932
71.1 mm (2.8 in)
1933
81.3 mm (3.2 in)
1934
76.2 mm (3.0 in)
1935
101.1 mm (4.0 in)
1936
69.9 mm (2.8 in)
1937
98.8 mm (3.9 in)
1938
114.3 mm (4.5 in)
1939
49.5 mm (1.9 in)
1940
77.0 mm (3.0 in)
1941
50.5 mm (2.0 in)
1942
96.0 mm (3.8 in)
1943
50.8 mm (2.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Dover, 1893 to 1943. The record is 257.3 mm (10.1 in) in 1903, marked on the chart; the median year is 114.1 mm (4.5 in).
Wettest five days (Rx5day) at Dover by year
Year
Wettest five days (Rx5day)
1893
127.8 mm (5.0 in)
1894
135.6 mm (5.3 in)
1895
142.5 mm (5.6 in)
1896
134.2 mm (5.3 in)
1897
114.1 mm (4.5 in)
1898
67.6 mm (2.7 in)
1899
75.9 mm (3.0 in)
1900
97.6 mm (3.8 in)
1901
184.1 mm (7.2 in)
1902
156.3 mm (6.2 in)
1903
257.3 mm (10.1 in)
1904
142.7 mm (5.6 in)
1905
123.2 mm (4.9 in)
1906
82.6 mm (3.3 in)
1907
123.2 mm (4.9 in)
1908
117.1 mm (4.6 in)
1909
106.9 mm (4.2 in)
1910
94.0 mm (3.7 in)
1911
114.1 mm (4.5 in)
1912
107.2 mm (4.2 in)
1913
91.6 mm (3.6 in)
1914
100.3 mm (3.9 in)
1915
127.7 mm (5.0 in)
1916
77.5 mm (3.1 in)
1917
56.5 mm (2.2 in)
1918
65.7 mm (2.6 in)
1919
190.2 mm (7.5 in)
1920
97.3 mm (3.8 in)
1921
94.0 mm (3.7 in)
1922
115.9 mm (4.6 in)
1923
107.9 mm (4.2 in)
1924
118.9 mm (4.7 in)
1925
81.3 mm (3.2 in)
1926
116.0 mm (4.6 in)
1927
96.3 mm (3.8 in)
1928
80.8 mm (3.2 in)
1929
66.5 mm (2.6 in)
1930
101.4 mm (4.0 in)
1931
136.1 mm (5.4 in)
1932
96.3 mm (3.8 in)
1933
137.2 mm (5.4 in)
1934
121.0 mm (4.8 in)
1935
183.2 mm (7.2 in)
1936
86.8 mm (3.4 in)
1937
102.4 mm (4.0 in)
1938
196.1 mm (7.7 in)
1939
78.8 mm (3.1 in)
1940
128.1 mm (5.0 in)
1941
79.8 mm (3.1 in)
1942
159.5 mm (6.3 in)
1943
118.0 mm (4.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Dover, 1893 to 1943. The record is 34 days in 1924, marked on the chart; the median year is 16 days.
Longest dry spell (CDD) at Dover by year
Year
Longest dry spell (CDD)
1893
14 days
1894
18 days
1895
21 days
1896
12 days
1897
11 days
1898
12 days
1899
21 days
1900
17 days
1901
27 days
1902
14 days
1903
18 days
1904
19 days
1905
12 days
1906
16 days
1907
10 days
1908
21 days
1909
17 days
1910
17 days
1911
17 days
1912
17 days
1913
14 days
1914
21 days
1915
13 days
1916
13 days
1917
21 days
1918
16 days
1919
12 days
1920
11 days
1921
15 days
1922
25 days
1923
16 days
1924
34 days
1925
16 days
1926
15 days
1927
17 days
1928
12 days
1929
17 days
1930
21 days
1931
13 days
1932
14 days
1933
12 days
1934
14 days
1935
14 days
1936
12 days
1937
15 days
1938
13 days
1939
26 days
1940
16 days
1941
22 days
1942
24 days
1943
20 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
45 years with a frost
Across 45 years with a frost, the median last spring frost at Dover falls on 29 April and the median first autumn frost on 10 October, which leaves a median of 160 days between them.
Fitted over all years, the growing season changes by +0.2 days per decade at this station.
Frost dates and growing season at Dover
Measure
Median, all years
Earliest period
Recent period (1910 to 1943)
Recent against earliest
Fitted trend
Last spring frost
29 April
n/a
29 April
n/a
+0.2 days per decade
First autumn frost
10 October
n/a
9 October
n/a
+0.4 days per decade
Growing days
160 days
n/a
162 days
n/a
+0.2 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.
Rainfall Return Levels
43 years, 1893 to 1943
A day with at least 78.3 mm (3.1 in) of rain is expected about once in 2 years. A day with at least 153.0 mm (6.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Dover: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
78.3 mm (3.1 in)
5 years
100.7 mm (4.0 in)
10 years
114.5 mm (4.5 in)
25 years
130.9 mm (5.2 in)
50 years
142.3 mm (5.6 in)
Longer than the 43 years of record
100 years
153.0 mm (6.0 in)
Longer than the 43 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, 43 years of values from 1893 to 1943.
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: 146.1 mm (5.8 in) in 1903; 142.2 mm (5.6 in) in 1904; 132.1 mm (5.2 in) in 1901.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Dover, at 1915. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1915 ran 0.2 C (0.3 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Dover, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1915
+0.2
+0.3
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 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.