Record envelope, standing records and threshold days for Philadelphia City (USW00013779), Pennsylvania, United States, with 123 years of record.
Key Facts for Philadelphia City
Philadelphia City (USW00013779) is a weather station in Pennsylvania, United States at 39.95 latitude and -75.15 longitude, 8 m (26 ft) above sea level.
The station reports from 1871 to 1993, 123 years of record.
1,464 records set at Philadelphia City still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Philadelphia City tied a daily record low maximum temperature of 22.8 C (73.0 F) on 19 July 1993.
About the Station
Location: Pennsylvania, United States, 39.95 latitude, -75.15 longitude.
Elevation: 8 m (26 ft).
Period of record: 1871 to 1993, 123 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 Philadelphia City. 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 Philadelphia City, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
23.3 C (73.9 F)
-20.6 C (-5.1 F)
n/a
n/a
Feb
26.1 C (79.0 F)
-23.9 C (-11.0 F)
n/a
n/a
Mar
30.0 C (86.0 F)
-14.4 C (6.1 F)
n/a
n/a
Apr
35.6 C (96.1 F)
-10.0 C (14.0 F)
n/a
n/a
May
36.7 C (98.1 F)
1.7 C (35.1 F)
n/a
n/a
Jun
38.9 C (102.0 F)
7.8 C (46.0 F)
n/a
n/a
Jul
40.0 C (104.0 F)
12.2 C (54.0 F)
n/a
n/a
Aug
41.1 C (106.0 F)
10.0 C (50.0 F)
n/a
n/a
Sep
38.9 C (102.0 F)
4.4 C (39.9 F)
n/a
n/a
Oct
34.4 C (93.9 F)
-1.7 C (28.9 F)
n/a
n/a
Nov
28.9 C (84.0 F)
-13.3 C (8.1 F)
n/a
n/a
Dec
23.3 C (73.9 F)
-20.6 C (-5.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Philadelphia City still stand. 1875 holds the most, with 37.
Standing records at Philadelphia City by the year they were set
Year set
Standing records
1874
17
1875
37
1876
20
1877
9
1878
2
1879
22
1880
26
1881
31
1882
10
1883
15
1884
21
1885
22
1886
21
1887
9
1888
25
1889
11
1890
17
1891
18
1892
11
1893
18
1894
16
1895
31
1896
24
1897
6
1898
8
1899
15
1900
19
1901
12
1902
7
1903
17
1904
11
1905
5
1906
8
1907
16
1908
7
1909
7
1910
5
1911
7
1912
4
1913
19
1914
18
1915
10
1916
12
1917
13
1918
19
1919
15
1920
8
1921
9
1922
5
1923
14
1924
6
1925
26
1926
11
1927
11
1928
11
1929
19
1930
25
1931
3
1932
12
1933
19
1934
14
1935
15
1936
12
1937
3
1938
11
1939
5
1940
15
1941
10
1942
11
1943
9
1944
1
1945
17
1946
11
1947
20
1948
14
1949
9
1950
16
1951
9
1952
6
1953
17
1954
9
1955
8
1956
9
1957
11
1958
4
1959
15
1960
9
1961
8
1962
12
1963
14
1964
15
1974
14
1975
13
1976
17
1977
11
1978
4
1979
14
1980
4
1981
3
1982
19
1983
22
1984
23
1985
16
1986
11
1987
11
1988
10
1989
6
1990
23
1991
20
1992
7
1993
5
All-Time Record Progression
4 new records
4 all-time records were set at Philadelphia City between 3 April 1915 and 26 June 1952. Each dot is a new record.
When Philadelphia City set new all-time records
Date
Kind
Detail
1915-04-03
Record daily snowfall
Record daily snowfall 48.3 cm (19.0 in)
1918-08-07
Record high maximum temperature
Record high maximum temperature 41.1 C (106.0 F)
1934-02-09
Record low minimum temperature
Record low minimum temperature -23.9 C (-11.0 F)
1952-06-26
Record high minimum temperature
Record high minimum temperature 28.9 C (84.0 F)
Wettest Day of Each Month
Aug: 143.0 mm (5.6 in)
The wettest day on record for each calendar month at Philadelphia City. The most was 143.0 mm (5.6 in) on 3 August 1898.
Record daily precipitation for each month at Philadelphia City
Month
Record daily precipitation (mm)
Date
Jan
63.2 mm (2.5 in)
7 January 1874
Feb
98.0 mm (3.9 in)
6 February 1896
Mar
70.9 mm (2.8 in)
15 March 1912
Apr
84.6 mm (3.3 in)
30 April 1947
May
80.3 mm (3.2 in)
27 May 1918
Jun
83.8 mm (3.3 in)
16 June 1906
Jul
89.2 mm (3.5 in)
10 July 1950
Aug
143.0 mm (5.6 in)
3 August 1898
Sep
118.1 mm (4.6 in)
22 September 1882
Oct
69.3 mm (2.7 in)
4 October 1877
Nov
110.0 mm (4.3 in)
7 November 1977
Dec
94.2 mm (3.7 in)
7 December 1914
Period of Record Coverage
1874 to 1993
Complete yearUnder 90 percent of days
111 years of record at Philadelphia City, 1874 to 1993. 1 years have data for under 90 percent of days and are left out of rankings: 1993.
Cooler than the station meanWarmer than the station mean
One stripe for each of 110 complete years at Philadelphia City, 1874 to 1992. Blue stripes are years cooler than the station's own mean of 12.9 C (55.3 F); red stripes are warmer. The coolest year was 1875, at 10.0 C (50.1 F), and the warmest was 1990, at 14.9 C (58.8 F). The strongest colour marks a difference of 3.0 C (5.4 F).
Annual mean temperature at Philadelphia City as warming stripes, 1874 to 1992
Year
Annual mean temperature
Difference from the station mean
1874
11.7 C
-1.28 C
1875
10.0 C
-2.90 C
1876
11.5 C
-1.47 C
1877
12.4 C
-0.56 C
1878
12.7 C
-0.21 C
1879
12.0 C
-0.92 C
1880
12.7 C
-0.25 C
1881
12.5 C
-0.45 C
1882
12.7 C
-0.25 C
1883
12.3 C
-0.68 C
1884
12.3 C
-0.59 C
1885
11.1 C
-1.86 C
1886
12.1 C
-0.88 C
1887
12.5 C
-0.42 C
1888
11.6 C
-1.35 C
1889
12.6 C
-0.30 C
1890
12.7 C
-0.19 C
1891
12.8 C
-0.18 C
1892
11.9 C
-1.06 C
1893
11.6 C
-1.36 C
1894
12.8 C
-0.17 C
1895
12.0 C
-0.95 C
1896
12.5 C
-0.44 C
1897
12.5 C
-0.39 C
1898
13.1 C
+0.19 C
1899
12.5 C
-0.46 C
1900
13.4 C
+0.43 C
1901
12.1 C
-0.84 C
1902
12.4 C
-0.57 C
1903
12.3 C
-0.61 C
1904
11.0 C
-1.94 C
1905
12.2 C
-0.75 C
1906
13.0 C
+0.05 C
1907
11.7 C
-1.23 C
1908
13.1 C
+0.14 C
1909
12.9 C
-0.07 C
1910
12.8 C
-0.16 C
1911
13.0 C
+0.09 C
1912
12.3 C
-0.60 C
1913
13.9 C
+0.95 C
1914
12.4 C
-0.56 C
1915
13.0 C
+0.05 C
1916
12.4 C
-0.53 C
1917
11.5 C
-1.40 C
1918
12.7 C
-0.24 C
1919
13.2 C
+0.26 C
1920
12.4 C
-0.50 C
1921
13.9 C
+1.00 C
1922
13.2 C
+0.24 C
1923
12.9 C
0.00 C
1924
12.1 C
-0.83 C
1925
13.3 C
+0.36 C
1926
12.0 C
-0.95 C
1927
13.1 C
+0.15 C
1928
13.0 C
+0.08 C
1929
13.3 C
+0.32 C
1930
13.8 C
+0.82 C
1931
14.5 C
+1.57 C
1932
13.9 C
+1.00 C
1933
13.6 C
+0.65 C
1934
12.8 C
-0.09 C
1935
12.4 C
-0.49 C
1936
12.7 C
-0.23 C
1937
12.9 C
-0.01 C
1938
13.3 C
+0.41 C
1939
13.2 C
+0.28 C
1940
11.7 C
-1.20 C
1941
13.5 C
+0.53 C
1942
13.1 C
+0.13 C
1943
12.8 C
-0.13 C
1944
13.1 C
+0.18 C
1945
13.1 C
+0.14 C
1946
13.8 C
+0.89 C
1947
12.8 C
-0.10 C
1948
12.9 C
-0.05 C
1949
14.3 C
+1.41 C
1950
12.7 C
-0.24 C
1951
13.4 C
+0.51 C
1952
13.7 C
+0.79 C
1953
14.4 C
+1.50 C
1954
13.5 C
+0.60 C
1955
13.5 C
+0.53 C
1956
12.9 C
-0.04 C
1957
13.7 C
+0.79 C
1958
12.2 C
-0.77 C
1959
14.1 C
+1.20 C
1960
13.2 C
+0.25 C
1961
13.4 C
+0.51 C
1962
12.7 C
-0.28 C
1963
13.3 C
+0.32 C
1964
13.8 C
+0.83 C
1974
13.5 C
+0.55 C
1975
14.0 C
+1.04 C
1976
13.4 C
+0.44 C
1977
13.4 C
+0.48 C
1978
12.2 C
-0.70 C
1979
13.0 C
+0.02 C
1980
13.8 C
+0.88 C
1981
13.6 C
+0.64 C
1982
13.2 C
+0.22 C
1983
14.5 C
+1.52 C
1984
14.7 C
+1.77 C
1985
14.3 C
+1.34 C
1986
14.4 C
+1.48 C
1987
14.0 C
+1.11 C
1988
13.4 C
+0.45 C
1989
13.2 C
+0.27 C
1990
14.9 C
+1.94 C
1991
14.7 C
+1.81 C
1992
12.9 C
-0.05 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1874 to 1992. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 110 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Philadelphia City
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.2) per decade
0.3 F (0.2 to 0.4) per decade
1874 to 1992
110
Rise
Mean daily maximum
0.2 C (0.1 to 0.2) per decade
0.3 F (0.2 to 0.4) per decade
1874 to 1992
110
Rise
Mean daily minimum
0.2 C (0.1 to 0.2) per decade
0.3 F (0.2 to 0.4) per decade
1874 to 1992
110
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
1871 to 1993
Yearly extremes at Philadelphia City: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.1 C (106.0 F)
1918
36.1 C (97.0 F)
111
Coldest night (TNn)
-23.9 C (-11.0 F)
1934
-13.9 C (7.0 F)
111
Wettest day (Rx1day)
143.0 mm (5.6 in)
1898
64.0 mm (2.5 in)
91
Wettest five days (Rx5day)
257.6 mm (10.1 in)
1882
90.4 mm (3.6 in)
91
Longest dry spell (CDD)
37 days
1924
18 days
91
Hottest day (TXx)
The hottest day of the year at Philadelphia City, 1871 to 1993. The record is 41.1 C (106.0 F) in 1918, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Philadelphia City by year
Year
Hottest day (TXx)
1871
n/a
1872
n/a
1873
n/a
1874
36.1 C (97.0 F)
1875
35.0 C (95.0 F)
1876
37.8 C (100.0 F)
1877
35.0 C (95.0 F)
1878
36.1 C (97.0 F)
1879
35.6 C (96.1 F)
1880
35.6 C (96.1 F)
1881
38.9 C (102.0 F)
1882
35.0 C (95.0 F)
1883
34.4 C (93.9 F)
1884
35.0 C (95.0 F)
1885
36.1 C (97.0 F)
1886
34.4 C (93.9 F)
1887
37.8 C (100.0 F)
1888
36.7 C (98.1 F)
1889
34.4 C (93.9 F)
1890
36.1 C (97.0 F)
1891
36.1 C (97.0 F)
1892
38.3 C (100.9 F)
1893
36.7 C (98.1 F)
1894
36.1 C (97.0 F)
1895
36.7 C (98.1 F)
1896
36.1 C (97.0 F)
1897
35.6 C (96.1 F)
1898
37.8 C (100.0 F)
1899
36.1 C (97.0 F)
1900
38.3 C (100.9 F)
1901
39.4 C (102.9 F)
1902
35.0 C (95.0 F)
1903
35.6 C (96.1 F)
1904
35.6 C (96.1 F)
1905
36.7 C (98.1 F)
1906
35.6 C (96.1 F)
1907
33.9 C (93.0 F)
1908
36.1 C (97.0 F)
1909
36.7 C (98.1 F)
1910
35.0 C (95.0 F)
1911
37.2 C (99.0 F)
1912
35.0 C (95.0 F)
1913
36.1 C (97.0 F)
1914
35.6 C (96.1 F)
1915
35.6 C (96.1 F)
1916
36.1 C (97.0 F)
1917
38.3 C (100.9 F)
1918
41.1 C (106.0 F)
1919
37.8 C (100.0 F)
1920
35.0 C (95.0 F)
1921
35.6 C (96.1 F)
1922
34.4 C (93.9 F)
1923
37.2 C (99.0 F)
1924
35.6 C (96.1 F)
1925
37.8 C (100.0 F)
1926
37.8 C (100.0 F)
1927
35.0 C (95.0 F)
1928
35.0 C (95.0 F)
1929
35.0 C (95.0 F)
1930
39.4 C (102.9 F)
1931
36.7 C (98.1 F)
1932
36.1 C (97.0 F)
1933
37.2 C (99.0 F)
1934
38.9 C (102.0 F)
1935
35.0 C (95.0 F)
1936
40.0 C (104.0 F)
1937
36.7 C (98.1 F)
1938
35.0 C (95.0 F)
1939
35.6 C (96.1 F)
1940
37.2 C (99.0 F)
1941
36.1 C (97.0 F)
1942
36.7 C (98.1 F)
1943
34.4 C (93.9 F)
1944
36.1 C (97.0 F)
1945
37.2 C (99.0 F)
1946
35.0 C (95.0 F)
1947
33.9 C (93.0 F)
1948
38.3 C (100.9 F)
1949
36.7 C (98.1 F)
1950
33.9 C (93.0 F)
1951
34.4 C (93.9 F)
1952
36.7 C (98.1 F)
1953
37.8 C (100.0 F)
1954
37.2 C (99.0 F)
1955
37.8 C (100.0 F)
1956
34.4 C (93.9 F)
1957
36.7 C (98.1 F)
1958
32.8 C (91.0 F)
1959
37.2 C (99.0 F)
1960
34.4 C (93.9 F)
1961
35.6 C (96.1 F)
1962
36.7 C (98.1 F)
1963
38.3 C (100.9 F)
1964
37.2 C (99.0 F)
1974
33.9 C (93.0 F)
1975
36.1 C (97.0 F)
1976
35.6 C (96.1 F)
1977
37.2 C (99.0 F)
1978
35.6 C (96.1 F)
1979
34.4 C (93.9 F)
1980
37.2 C (99.0 F)
1981
35.6 C (96.1 F)
1982
34.4 C (93.9 F)
1983
38.9 C (102.0 F)
1984
37.2 C (99.0 F)
1985
35.0 C (95.0 F)
1986
36.7 C (98.1 F)
1987
36.7 C (98.1 F)
1988
36.7 C (98.1 F)
1989
35.0 C (95.0 F)
1990
35.6 C (96.1 F)
1991
36.7 C (98.1 F)
1992
35.0 C (95.0 F)
1993
36.1 C (97.0 F)
Coldest night (TNn)
The coldest night of the year at Philadelphia City, 1871 to 1993. The record is -23.9 C (-11.0 F) in 1934, marked on the chart; the median year is -13.9 C (7.0 F).
Coldest night (TNn) at Philadelphia City by year
Year
Coldest night (TNn)
1871
n/a
1872
n/a
1873
n/a
1874
-12.2 C (10.0 F)
1875
-20.6 C (-5.1 F)
1876
-15.6 C (3.9 F)
1877
-13.3 C (8.1 F)
1878
-11.1 C (12.0 F)
1879
-19.4 C (-2.9 F)
1880
-20.6 C (-5.1 F)
1881
-18.3 C (-0.9 F)
1882
-17.8 C (0.0 F)
1883
-12.8 C (9.0 F)
1884
-17.2 C (1.0 F)
1885
-17.8 C (0.0 F)
1886
-18.9 C (-2.0 F)
1887
-13.3 C (8.1 F)
1888
-16.7 C (1.9 F)
1889
-16.7 C (1.9 F)
1890
-12.8 C (9.0 F)
1891
-11.1 C (12.0 F)
1892
-12.2 C (10.0 F)
1893
-17.8 C (0.0 F)
1894
-15.6 C (3.9 F)
1895
-19.4 C (-2.9 F)
1896
-18.9 C (-2.0 F)
1897
-13.9 C (7.0 F)
1898
-13.3 C (8.1 F)
1899
-21.1 C (-6.0 F)
1900
-14.4 C (6.1 F)
1901
-13.3 C (8.1 F)
1902
-11.1 C (12.0 F)
1903
-16.1 C (3.0 F)
1904
-18.9 C (-2.0 F)
1905
-14.4 C (6.1 F)
1906
-13.3 C (8.1 F)
1907
-14.4 C (6.1 F)
1908
-15.0 C (5.0 F)
1909
-12.8 C (9.0 F)
1910
-15.0 C (5.0 F)
1911
-8.3 C (17.1 F)
1912
-17.8 C (0.0 F)
1913
-10.0 C (14.0 F)
1914
-17.8 C (0.0 F)
1915
-10.0 C (14.0 F)
1916
-15.0 C (5.0 F)
1917
-20.0 C (-4.0 F)
1918
-18.9 C (-2.0 F)
1919
-15.6 C (3.9 F)
1920
-16.7 C (1.9 F)
1921
-13.9 C (7.0 F)
1922
-15.6 C (3.9 F)
1923
-12.2 C (10.0 F)
1924
-14.4 C (6.1 F)
1925
-16.1 C (3.0 F)
1926
-13.9 C (7.0 F)
1927
-15.6 C (3.9 F)
1928
-11.7 C (10.9 F)
1929
-12.8 C (9.0 F)
1930
-13.3 C (8.1 F)
1931
-8.9 C (16.0 F)
1932
-9.4 C (15.1 F)
1933
-16.1 C (3.0 F)
1934
-23.9 C (-11.0 F)
1935
-16.1 C (3.0 F)
1936
-18.9 C (-2.0 F)
1937
-7.8 C (18.0 F)
1938
-11.7 C (10.9 F)
1939
-11.1 C (12.0 F)
1940
-15.0 C (5.0 F)
1941
-9.4 C (15.1 F)
1942
-16.7 C (1.9 F)
1943
-16.1 C (3.0 F)
1944
-10.6 C (12.9 F)
1945
-16.1 C (3.0 F)
1946
-11.7 C (10.9 F)
1947
-14.4 C (6.1 F)
1948
-14.4 C (6.1 F)
1949
-7.2 C (19.0 F)
1950
-12.2 C (10.0 F)
1951
-12.2 C (10.0 F)
1952
-12.8 C (9.0 F)
1953
-7.8 C (18.0 F)
1954
-10.6 C (12.9 F)
1955
-14.4 C (6.1 F)
1956
-7.8 C (18.0 F)
1957
-13.3 C (8.1 F)
1958
-14.4 C (6.1 F)
1959
-11.1 C (12.0 F)
1960
-12.8 C (9.0 F)
1961
-17.8 C (0.0 F)
1962
-15.6 C (3.9 F)
1963
-16.1 C (3.0 F)
1964
-12.2 C (10.0 F)
1974
-10.0 C (14.0 F)
1975
-8.9 C (16.0 F)
1976
-13.3 C (8.1 F)
1977
-17.8 C (0.0 F)
1978
-11.7 C (10.9 F)
1979
-17.2 C (1.0 F)
1980
-12.2 C (10.0 F)
1981
-13.9 C (7.0 F)
1982
-20.0 C (-4.0 F)
1983
-15.6 C (3.9 F)
1984
-12.2 C (10.0 F)
1985
-19.4 C (-2.9 F)
1986
-10.6 C (12.9 F)
1987
-12.2 C (10.0 F)
1988
-12.8 C (9.0 F)
1989
-13.9 C (7.0 F)
1990
-11.7 C (10.9 F)
1991
-11.1 C (12.0 F)
1992
-10.6 C (12.9 F)
1993
-12.8 C (9.0 F)
Wettest day (Rx1day)
The wettest day of the year at Philadelphia City, 1871 to 1993. The record is 143.0 mm (5.6 in) in 1898, marked on the chart; the median year is 64.0 mm (2.5 in).
Wettest day (Rx1day) at Philadelphia City by year
Year
Wettest day (Rx1day)
1871
33.0 mm (1.3 in)
1872
53.6 mm (2.1 in)
1873
132.3 mm (5.2 in)
1874
65.0 mm (2.6 in)
1875
49.5 mm (1.9 in)
1876
88.4 mm (3.5 in)
1877
69.3 mm (2.7 in)
1878
49.0 mm (1.9 in)
1879
58.9 mm (2.3 in)
1880
49.0 mm (1.9 in)
1881
41.7 mm (1.6 in)
1882
118.1 mm (4.6 in)
1883
72.6 mm (2.9 in)
1884
63.0 mm (2.5 in)
1885
63.5 mm (2.5 in)
1886
44.2 mm (1.7 in)
1887
69.9 mm (2.8 in)
1888
56.6 mm (2.2 in)
1889
76.2 mm (3.0 in)
1890
29.5 mm (1.2 in)
1891
40.9 mm (1.6 in)
1892
50.8 mm (2.0 in)
1893
49.5 mm (1.9 in)
1894
74.7 mm (2.9 in)
1895
55.4 mm (2.2 in)
1896
98.0 mm (3.9 in)
1897
51.3 mm (2.0 in)
1898
143.0 mm (5.6 in)
1899
52.1 mm (2.1 in)
1900
96.3 mm (3.8 in)
1901
71.1 mm (2.8 in)
1902
52.3 mm (2.1 in)
1903
52.8 mm (2.1 in)
1904
74.4 mm (2.9 in)
1905
69.6 mm (2.7 in)
1906
83.8 mm (3.3 in)
1907
54.4 mm (2.1 in)
1908
68.3 mm (2.7 in)
1909
56.4 mm (2.2 in)
1910
51.6 mm (2.0 in)
1911
86.6 mm (3.4 in)
1912
70.9 mm (2.8 in)
1913
44.7 mm (1.8 in)
1914
94.2 mm (3.7 in)
1915
74.2 mm (2.9 in)
1916
44.7 mm (1.8 in)
1917
65.3 mm (2.6 in)
1918
80.3 mm (3.2 in)
1919
80.3 mm (3.2 in)
1920
58.7 mm (2.3 in)
1921
94.0 mm (3.7 in)
1922
32.5 mm (1.3 in)
1923
55.6 mm (2.2 in)
1924
54.9 mm (2.2 in)
1925
44.5 mm (1.8 in)
1926
75.2 mm (3.0 in)
1927
53.6 mm (2.1 in)
1928
70.1 mm (2.8 in)
1929
74.7 mm (2.9 in)
1930
70.4 mm (2.8 in)
1931
75.9 mm (3.0 in)
1932
52.3 mm (2.1 in)
1933
95.0 mm (3.7 in)
1934
38.4 mm (1.5 in)
1935
82.6 mm (3.3 in)
1936
46.2 mm (1.8 in)
1937
38.4 mm (1.5 in)
1938
83.1 mm (3.3 in)
1939
94.7 mm (3.7 in)
1940
81.0 mm (3.2 in)
1941
77.0 mm (3.0 in)
1942
74.9 mm (2.9 in)
1943
n/a
1944
78.7 mm (3.1 in)
1945
72.1 mm (2.8 in)
1946
54.9 mm (2.2 in)
1947
84.6 mm (3.3 in)
1948
53.3 mm (2.1 in)
1949
46.5 mm (1.8 in)
1950
97.8 mm (3.9 in)
1951
55.1 mm (2.2 in)
1952
71.4 mm (2.8 in)
1953
57.4 mm (2.3 in)
1954
52.6 mm (2.1 in)
1955
77.2 mm (3.0 in)
1956
41.9 mm (1.6 in)
1957
33.3 mm (1.3 in)
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
n/a
1964
n/a
1974
48.0 mm (1.9 in)
1975
64.0 mm (2.5 in)
1976
57.7 mm (2.3 in)
1977
124.0 mm (4.9 in)
1978
69.3 mm (2.7 in)
1979
n/a
1980
n/a
1981
n/a
1982
n/a
1983
n/a
1984
n/a
1985
n/a
1986
n/a
1987
n/a
1988
n/a
1989
n/a
1990
n/a
1991
n/a
1992
n/a
1993
n/a
Wettest five days (Rx5day)
The wettest five days of the year at Philadelphia City, 1871 to 1993. The record is 257.6 mm (10.1 in) in 1882, marked on the chart; the median year is 90.4 mm (3.6 in).
Wettest five days (Rx5day) at Philadelphia City by year
Year
Wettest five days (Rx5day)
1871
45.2 mm (1.8 in)
1872
118.8 mm (4.7 in)
1873
174.2 mm (6.9 in)
1874
137.3 mm (5.4 in)
1875
75.7 mm (3.0 in)
1876
123.7 mm (4.9 in)
1877
76.5 mm (3.0 in)
1878
92.5 mm (3.6 in)
1879
150.1 mm (5.9 in)
1880
91.9 mm (3.6 in)
1881
52.4 mm (2.1 in)
1882
257.6 mm (10.1 in)
1883
75.6 mm (3.0 in)
1884
83.8 mm (3.3 in)
1885
108.5 mm (4.3 in)
1886
66.1 mm (2.6 in)
1887
116.8 mm (4.6 in)
1888
69.9 mm (2.8 in)
1889
116.5 mm (4.6 in)
1890
58.2 mm (2.3 in)
1891
72.6 mm (2.9 in)
1892
76.2 mm (3.0 in)
1893
66.6 mm (2.6 in)
1894
157.6 mm (6.2 in)
1895
83.6 mm (3.3 in)
1896
108.4 mm (4.3 in)
1897
79.5 mm (3.1 in)
1898
171.2 mm (6.7 in)
1899
87.9 mm (3.5 in)
1900
98.3 mm (3.9 in)
1901
144.5 mm (5.7 in)
1902
89.1 mm (3.5 in)
1903
83.6 mm (3.3 in)
1904
164.3 mm (6.5 in)
1905
118.1 mm (4.6 in)
1906
145.3 mm (5.7 in)
1907
76.0 mm (3.0 in)
1908
85.9 mm (3.4 in)
1909
71.7 mm (2.8 in)
1910
85.3 mm (3.4 in)
1911
204.7 mm (8.1 in)
1912
138.6 mm (5.5 in)
1913
85.8 mm (3.4 in)
1914
126.7 mm (5.0 in)
1915
111.6 mm (4.4 in)
1916
71.4 mm (2.8 in)
1917
93.0 mm (3.7 in)
1918
87.9 mm (3.5 in)
1919
135.1 mm (5.3 in)
1920
90.4 mm (3.6 in)
1921
115.1 mm (4.5 in)
1922
69.5 mm (2.7 in)
1923
75.1 mm (3.0 in)
1924
69.5 mm (2.7 in)
1925
53.5 mm (2.1 in)
1926
101.8 mm (4.0 in)
1927
67.1 mm (2.6 in)
1928
74.4 mm (2.9 in)
1929
109.5 mm (4.3 in)
1930
72.2 mm (2.8 in)
1931
127.2 mm (5.0 in)
1932
87.9 mm (3.5 in)
1933
143.8 mm (5.7 in)
1934
89.6 mm (3.5 in)
1935
203.2 mm (8.0 in)
1936
65.0 mm (2.6 in)
1937
67.3 mm (2.6 in)
1938
166.9 mm (6.6 in)
1939
104.0 mm (4.1 in)
1940
114.0 mm (4.5 in)
1941
85.9 mm (3.4 in)
1942
120.7 mm (4.8 in)
1943
n/a
1944
146.3 mm (5.8 in)
1945
94.5 mm (3.7 in)
1946
120.7 mm (4.8 in)
1947
124.2 mm (4.9 in)
1948
82.4 mm (3.2 in)
1949
93.2 mm (3.7 in)
1950
101.4 mm (4.0 in)
1951
82.8 mm (3.3 in)
1952
112.5 mm (4.4 in)
1953
80.8 mm (3.2 in)
1954
67.5 mm (2.7 in)
1955
100.1 mm (3.9 in)
1956
90.4 mm (3.6 in)
1957
57.9 mm (2.3 in)
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
n/a
1964
n/a
1974
65.5 mm (2.6 in)
1975
165.9 mm (6.5 in)
1976
60.2 mm (2.4 in)
1977
129.1 mm (5.1 in)
1978
90.4 mm (3.6 in)
1979
n/a
1980
n/a
1981
n/a
1982
n/a
1983
n/a
1984
n/a
1985
n/a
1986
n/a
1987
n/a
1988
n/a
1989
n/a
1990
n/a
1991
n/a
1992
n/a
1993
n/a
Longest dry spell (CDD)
The longest dry spell of the year at Philadelphia City, 1871 to 1993. The record is 37 days in 1924, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Philadelphia City by year
Year
Longest dry spell (CDD)
1871
9 days
1872
14 days
1873
18 days
1874
29 days
1875
16 days
1876
15 days
1877
23 days
1878
15 days
1879
26 days
1880
21 days
1881
19 days
1882
14 days
1883
13 days
1884
22 days
1885
16 days
1886
32 days
1887
18 days
1888
15 days
1889
16 days
1890
15 days
1891
20 days
1892
19 days
1893
13 days
1894
18 days
1895
17 days
1896
22 days
1897
17 days
1898
17 days
1899
21 days
1900
16 days
1901
27 days
1902
23 days
1903
17 days
1904
18 days
1905
16 days
1906
18 days
1907
15 days
1908
21 days
1909
20 days
1910
30 days
1911
13 days
1912
26 days
1913
16 days
1914
21 days
1915
14 days
1916
14 days
1917
22 days
1918
16 days
1919
11 days
1920
14 days
1921
15 days
1922
17 days
1923
25 days
1924
37 days
1925
17 days
1926
14 days
1927
17 days
1928
18 days
1929
13 days
1930
21 days
1931
20 days
1932
13 days
1933
15 days
1934
17 days
1935
21 days
1936
16 days
1937
14 days
1938
15 days
1939
18 days
1940
15 days
1941
29 days
1942
20 days
1943
n/a
1944
18 days
1945
16 days
1946
18 days
1947
32 days
1948
11 days
1949
21 days
1950
15 days
1951
17 days
1952
29 days
1953
21 days
1954
26 days
1955
22 days
1956
13 days
1957
24 days
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
n/a
1964
n/a
1974
19 days
1975
22 days
1976
27 days
1977
18 days
1978
16 days
1979
n/a
1980
n/a
1981
n/a
1982
n/a
1983
n/a
1984
n/a
1985
n/a
1986
n/a
1987
n/a
1988
n/a
1989
n/a
1990
n/a
1991
n/a
1992
n/a
1993
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
110 years with a frost
Across 110 years with a frost, the median last spring frost at Philadelphia City falls on 5 April and the median first autumn frost on 16 November, which leaves a median of 228 days between them.
In 1954 to 1992 the median growing season was 236 days. That is 19 days more than in 1874 to 1903.
Fitted over all years, the growing season changes by +2.4 days per decade at this station.
Frost dates and growing season at Philadelphia City
Measure
Median, all years
Earliest period (1874 to 1903)
Recent period (1954 to 1992)
Recent against earliest
Fitted trend
Last spring frost
5 April
8 April
30 March
9 days earlier
-1.1 days per decade
First autumn frost
16 November
12 November
20 November
8 days later
+1.3 days per decade
Growing days
228 days
217 days
236 days
19 days more
+2.4 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
87 years, 1872 to 1977
A day with at least 63.2 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 136.1 mm (5.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Philadelphia City: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
63.2 mm (2.5 in)
5 years
82.2 mm (3.2 in)
10 years
94.9 mm (3.7 in)
25 years
111.3 mm (4.4 in)
50 years
123.7 mm (4.9 in)
100 years
136.1 mm (5.4 in)
Longer than the 87 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, 87 years of values from 1872 to 1977.
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: 143.0 mm (5.6 in) in 1898; 132.3 mm (5.2 in) in 1873; 124.0 mm (4.9 in) in 1977.
Station Changes
3 suspected
3 changes were suspected in the annual mean temperature of Philadelphia City, at 1935, 1943 and 1959. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1935 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 1943 ran 0.2 C (0.3 F) higher than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1959 ran 0.3 C (0.5 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Philadelphia City, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1935
-0.4
-0.7
likely
5
1943
+0.2
+0.3
likely
5
1959
+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 Philadelphia City standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Philadelphia City 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.