Record envelope, standing records and threshold days for Palmerton (USC00366689), Pennsylvania, United States, with 81 years of record.
Key Facts for Palmerton
Palmerton (USC00366689) is a weather station in Pennsylvania, United States at 40.80 latitude and -75.62 longitude, 125 m (410 ft) above sea level.
The station reports from 1917 to 1997, 81 years of record.
1,464 records set at Palmerton still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Palmerton set a daily record snowfall of 5.6 cm (2.2 in) on 10 December 1997.
About the Station
Location: Pennsylvania, United States, 40.80 latitude, -75.62 longitude.
Elevation: 125 m (410 ft).
Period of record: 1917 to 1997, 81 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 Palmerton. 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 Palmerton, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
21.1 C (70.0 F)
-30.6 C (-23.1 F)
n/a
n/a
Feb
23.9 C (75.0 F)
-27.2 C (-17.0 F)
n/a
n/a
Mar
29.4 C (84.9 F)
-22.2 C (-8.0 F)
n/a
n/a
Apr
36.1 C (97.0 F)
-12.2 C (10.0 F)
n/a
n/a
May
38.3 C (100.9 F)
-3.9 C (25.0 F)
n/a
n/a
Jun
38.9 C (102.0 F)
2.2 C (36.0 F)
n/a
n/a
Jul
40.0 C (104.0 F)
5.0 C (41.0 F)
n/a
n/a
Aug
41.1 C (106.0 F)
3.9 C (39.0 F)
n/a
n/a
Sep
37.8 C (100.0 F)
-3.3 C (26.1 F)
n/a
n/a
Oct
33.9 C (93.0 F)
-8.9 C (16.0 F)
n/a
n/a
Nov
28.3 C (82.9 F)
-16.7 C (1.9 F)
n/a
n/a
Dec
22.8 C (73.0 F)
-22.8 C (-9.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Palmerton still stand. 1976 holds the most, with 40.
Standing records at Palmerton by the year they were set
Year set
Standing records
1917
5
1918
22
1919
21
1920
20
1921
15
1922
18
1923
27
1924
19
1925
33
1926
31
1927
27
1928
21
1929
21
1930
23
1931
11
1932
19
1933
18
1934
26
1935
17
1936
21
1937
12
1938
12
1939
6
1940
30
1941
27
1942
21
1943
21
1944
13
1945
26
1946
18
1947
20
1948
21
1949
26
1950
22
1951
23
1952
16
1953
11
1954
11
1955
14
1956
18
1957
17
1958
16
1959
18
1960
22
1961
13
1962
14
1963
14
1964
23
1965
22
1966
12
1967
21
1968
15
1969
25
1970
24
1971
13
1972
25
1973
22
1974
19
1975
34
1976
40
1977
14
1978
5
1979
29
1980
7
1981
7
1982
15
1983
8
1984
10
1985
5
1988
19
1989
8
1990
30
1991
27
1992
6
1993
22
1994
6
1995
17
1996
24
1997
13
All-Time Record Progression
5 new records
5 all-time records were set at Palmerton between 14 February 1983 and 13 January 1996. Each dot is a new record.
When Palmerton set new all-time records
Date
Kind
Detail
1983-02-14
Record snow depth
Record snow depth 61.0 cm (24.0 in)
1987-07-14
Record daily precipitation
Record daily precipitation 141.7 mm (5.6 in)
1994-01-21
Record low minimum temperature
Record low minimum temperature -30.6 C (-23.1 F)
1994-02-14
Record snow depth
Record snow depth 81.3 cm (32.0 in)
1996-01-13
Record snow depth
Record snow depth 91.4 cm (36.0 in)
Wettest Day of Each Month
Jul: 141.7 mm (5.6 in)
The wettest day on record for each calendar month at Palmerton. The most was 141.7 mm (5.6 in) on 14 July 1987.
Record daily precipitation for each month at Palmerton
Month
Record daily precipitation (mm)
Date
Jan
53.8 mm (2.1 in)
19 January 1936
Feb
51.6 mm (2.0 in)
7 February 1965
Mar
74.4 mm (2.9 in)
11 March 1952
Apr
100.1 mm (3.9 in)
15 April 1983
May
91.7 mm (3.6 in)
28 May 1918
Jun
84.8 mm (3.3 in)
19 June 1927
Jul
141.7 mm (5.6 in)
14 July 1987
Aug
120.1 mm (4.7 in)
18 August 1955
Sep
135.1 mm (5.3 in)
27 September 1942
Oct
101.9 mm (4.0 in)
19 October 1996
Nov
80.8 mm (3.2 in)
25 November 1950
Dec
101.3 mm (4.0 in)
20 December 1957
Period of Record Coverage
1917 to 1997
Complete yearUnder 90 percent of days
80 years of record at Palmerton, 1917 to 1997. 13 years have data for under 90 percent of days and are left out of rankings: 1917, 1918, 1937, 1976, 1977, 1978, 1980, 1981 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 58 complete years at Palmerton, 1919 to 1997. 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 1958, at 9.1 C (48.4 F), and the warmest was 1990, at 12.8 C (55.0 F). The strongest colour marks a difference of 2.5 C (4.5 F).
Annual mean temperature at Palmerton as warming stripes, 1919 to 1997
Year
Annual mean temperature
Difference from the station mean
1919
10.9 C
+0.54 C
1920
9.7 C
-0.63 C
1921
11.3 C
+0.95 C
1922
10.3 C
+0.02 C
1923
10.0 C
-0.29 C
1924
9.6 C
-0.73 C
1927
10.1 C
-0.20 C
1928
10.2 C
-0.08 C
1930
10.3 C
-0.01 C
1931
11.2 C
+0.86 C
1934
9.8 C
-0.49 C
1935
9.7 C
-0.60 C
1937
10.3 C
+0.00 C
1938
10.7 C
+0.42 C
1939
10.6 C
+0.29 C
1940
9.3 C
-1.01 C
1941
11.0 C
+0.71 C
1942
10.7 C
+0.38 C
1943
10.1 C
-0.24 C
1944
10.1 C
-0.18 C
1945
9.8 C
-0.48 C
1946
10.2 C
-0.10 C
1947
9.7 C
-0.58 C
1948
9.8 C
-0.51 C
1949
11.4 C
+1.09 C
1950
9.8 C
-0.53 C
1951
10.3 C
-0.04 C
1952
10.6 C
+0.25 C
1954
10.5 C
+0.18 C
1955
10.4 C
+0.12 C
1956
9.8 C
-0.51 C
1957
10.5 C
+0.15 C
1958
9.1 C
-1.19 C
1959
10.7 C
+0.34 C
1960
9.6 C
-0.68 C
1961
10.0 C
-0.32 C
1962
9.5 C
-0.84 C
1963
9.3 C
-1.06 C
1964
10.0 C
-0.32 C
1965
9.7 C
-0.61 C
1966
9.8 C
-0.47 C
1967
9.4 C
-0.87 C
1969
10.6 C
+0.28 C
1970
10.6 C
+0.33 C
1972
10.1 C
-0.17 C
1973
11.6 C
+1.33 C
1974
10.7 C
+0.40 C
1975
11.4 C
+1.11 C
1979
10.5 C
+0.15 C
1982
10.0 C
-0.33 C
1984
10.1 C
-0.18 C
1988
10.6 C
+0.29 C
1989
10.4 C
+0.12 C
1990
12.8 C
+2.46 C
1991
12.3 C
+1.94 C
1995
10.9 C
+0.56 C
1996
9.8 C
-0.51 C
1997
9.8 C
-0.55 C
The fitted trend in annual mean temperature here over 1919 to 1997 is 0.06 C (-0.02 to 0.15) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.11 F (-0.04 to 0.26) per decade. The slope is a straight line fitted to 58 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Palmerton
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.06 C (-0.02 to 0.15) per decade
0.11 F (-0.04 to 0.26) per decade
1919 to 1997
58
Not clearly different from zero
Mean daily maximum
0.13 C (0.00 to 0.25) per decade
0.23 F (0.01 to 0.46) per decade
1919 to 1997
58
Rise
Mean daily minimum
-0.01 C (-0.10 to 0.09) per decade
-0.01 F (-0.17 to 0.15) per decade
1919 to 1997
58
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
1917 to 1997
Yearly extremes at Palmerton: 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
35.6 C (96.1 F)
80
Coldest night (TNn)
-30.6 C (-23.1 F)
1994
-20.0 C (-4.0 F)
80
Wettest day (Rx1day)
141.7 mm (5.6 in)
1987
62.2 mm (2.4 in)
81
Wettest five days (Rx5day)
184.7 mm (7.3 in)
1955
95.0 mm (3.7 in)
81
Longest dry spell (CDD)
43 days
1924
19 days
81
Hottest day (TXx)
The hottest day of the year at Palmerton, 1917 to 1997. The record is 41.1 C (106.0 F) in 1918, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Palmerton by year
Year
Hottest day (TXx)
1917
35.6 C (96.1 F)
1918
41.1 C (106.0 F)
1919
38.9 C (102.0 F)
1920
34.4 C (93.9 F)
1921
35.6 C (96.1 F)
1922
35.6 C (96.1 F)
1923
37.2 C (99.0 F)
1924
37.2 C (99.0 F)
1925
38.9 C (102.0 F)
1926
37.8 C (100.0 F)
1927
36.1 C (97.0 F)
1928
35.0 C (95.0 F)
1929
34.4 C (93.9 F)
1930
37.8 C (100.0 F)
1931
36.1 C (97.0 F)
1932
35.6 C (96.1 F)
1933
36.1 C (97.0 F)
1934
36.7 C (98.1 F)
1935
33.3 C (91.9 F)
1936
38.3 C (100.9 F)
1937
35.6 C (96.1 F)
1938
34.4 C (93.9 F)
1939
35.6 C (96.1 F)
1940
36.7 C (98.1 F)
1941
37.2 C (99.0 F)
1942
36.7 C (98.1 F)
1943
37.8 C (100.0 F)
1944
35.6 C (96.1 F)
1945
36.1 C (97.0 F)
1946
33.9 C (93.0 F)
1947
32.2 C (90.0 F)
1948
36.7 C (98.1 F)
1949
36.7 C (98.1 F)
1950
33.3 C (91.9 F)
1951
32.2 C (90.0 F)
1952
36.7 C (98.1 F)
1953
37.8 C (100.0 F)
1954
37.2 C (99.0 F)
1955
37.2 C (99.0 F)
1956
33.3 C (91.9 F)
1957
36.1 C (97.0 F)
1958
33.3 C (91.9 F)
1959
35.0 C (95.0 F)
1960
32.2 C (90.0 F)
1961
33.3 C (91.9 F)
1962
35.0 C (95.0 F)
1963
34.4 C (93.9 F)
1964
35.6 C (96.1 F)
1965
33.9 C (93.0 F)
1966
38.3 C (100.9 F)
1967
33.9 C (93.0 F)
1968
35.6 C (96.1 F)
1969
36.1 C (97.0 F)
1970
35.6 C (96.1 F)
1971
36.7 C (98.1 F)
1972
36.7 C (98.1 F)
1973
37.8 C (100.0 F)
1974
36.1 C (97.0 F)
1975
40.6 C (105.1 F)
1976
36.7 C (98.1 F)
1977
35.6 C (96.1 F)
1978
35.6 C (96.1 F)
1979
32.2 C (90.0 F)
1980
35.0 C (95.0 F)
1981
32.8 C (91.0 F)
1982
33.3 C (91.9 F)
1983
35.0 C (95.0 F)
1984
33.9 C (93.0 F)
1985
32.2 C (90.0 F)
1986
n/a
1987
29.4 C (84.9 F)
1988
40.0 C (104.0 F)
1989
35.6 C (96.1 F)
1990
38.3 C (100.9 F)
1991
39.4 C (102.9 F)
1992
38.3 C (100.9 F)
1993
38.9 C (102.0 F)
1994
35.6 C (96.1 F)
1995
39.4 C (102.9 F)
1996
37.8 C (100.0 F)
1997
35.6 C (96.1 F)
Coldest night (TNn)
The coldest night of the year at Palmerton, 1917 to 1997. The record is -30.6 C (-23.1 F) in 1994, marked on the chart; the median year is -20.0 C (-4.0 F).
Coldest night (TNn) at Palmerton by year
Year
Coldest night (TNn)
1917
-1.7 C (28.9 F)
1918
-15.6 C (3.9 F)
1919
-22.2 C (-8.0 F)
1920
-22.2 C (-8.0 F)
1921
-17.8 C (0.0 F)
1922
-20.0 C (-4.0 F)
1923
-18.9 C (-2.0 F)
1924
-17.2 C (1.0 F)
1925
-28.3 C (-18.9 F)
1926
-19.4 C (-2.9 F)
1927
-18.3 C (-0.9 F)
1928
-18.3 C (-0.9 F)
1929
-18.9 C (-2.0 F)
1930
-21.1 C (-6.0 F)
1931
-14.4 C (6.1 F)
1932
-17.2 C (1.0 F)
1933
-20.0 C (-4.0 F)
1934
-26.1 C (-15.0 F)
1935
-23.9 C (-11.0 F)
1936
-23.3 C (-9.9 F)
1937
-13.9 C (7.0 F)
1938
-20.6 C (-5.1 F)
1939
-20.0 C (-4.0 F)
1940
-17.8 C (0.0 F)
1941
-14.4 C (6.1 F)
1942
-22.8 C (-9.0 F)
1943
-26.7 C (-16.1 F)
1944
-18.9 C (-2.0 F)
1945
-19.4 C (-2.9 F)
1946
-17.8 C (0.0 F)
1947
-17.8 C (0.0 F)
1948
-23.3 C (-9.9 F)
1949
-17.8 C (0.0 F)
1950
-21.7 C (-7.1 F)
1951
-20.6 C (-5.1 F)
1952
-15.0 C (5.0 F)
1953
-12.8 C (9.0 F)
1954
-22.8 C (-9.0 F)
1955
-17.2 C (1.0 F)
1956
-12.8 C (9.0 F)
1957
-23.3 C (-9.9 F)
1958
-22.2 C (-8.0 F)
1959
-17.8 C (0.0 F)
1960
-21.1 C (-6.0 F)
1961
-26.1 C (-15.0 F)
1962
-20.6 C (-5.1 F)
1963
-24.4 C (-11.9 F)
1964
-21.7 C (-7.1 F)
1965
-18.9 C (-2.0 F)
1966
-18.9 C (-2.0 F)
1967
-20.6 C (-5.1 F)
1968
-24.4 C (-11.9 F)
1969
-19.4 C (-2.9 F)
1970
-20.6 C (-5.1 F)
1971
-20.0 C (-4.0 F)
1972
-18.3 C (-0.9 F)
1973
-17.8 C (0.0 F)
1974
-17.8 C (0.0 F)
1975
-20.0 C (-4.0 F)
1976
-21.1 C (-6.0 F)
1977
-23.9 C (-11.0 F)
1978
-21.1 C (-6.0 F)
1979
-22.2 C (-8.0 F)
1980
-17.8 C (0.0 F)
1981
-17.8 C (0.0 F)
1982
-22.2 C (-8.0 F)
1983
-19.4 C (-2.9 F)
1984
-25.0 C (-13.0 F)
1985
-23.3 C (-9.9 F)
1986
n/a
1987
-15.6 C (3.9 F)
1988
-23.3 C (-9.9 F)
1989
-22.8 C (-9.0 F)
1990
-13.9 C (7.0 F)
1991
-15.6 C (3.9 F)
1992
-13.9 C (7.0 F)
1993
-17.2 C (1.0 F)
1994
-30.6 C (-23.1 F)
1995
-18.9 C (-2.0 F)
1996
-27.2 C (-17.0 F)
1997
-20.6 C (-5.1 F)
Wettest day (Rx1day)
The wettest day of the year at Palmerton, 1917 to 1997. The record is 141.7 mm (5.6 in) in 1987, marked on the chart; the median year is 62.2 mm (2.4 in).
Wettest day (Rx1day) at Palmerton by year
Year
Wettest day (Rx1day)
1917
57.2 mm (2.3 in)
1918
91.7 mm (3.6 in)
1919
53.1 mm (2.1 in)
1920
79.2 mm (3.1 in)
1921
62.2 mm (2.4 in)
1922
58.2 mm (2.3 in)
1923
39.4 mm (1.6 in)
1924
99.8 mm (3.9 in)
1925
33.0 mm (1.3 in)
1926
69.6 mm (2.7 in)
1927
84.8 mm (3.3 in)
1928
52.8 mm (2.1 in)
1929
98.6 mm (3.9 in)
1930
46.2 mm (1.8 in)
1931
43.7 mm (1.7 in)
1932
74.4 mm (2.9 in)
1933
73.4 mm (2.9 in)
1934
63.2 mm (2.5 in)
1935
90.7 mm (3.6 in)
1936
119.1 mm (4.7 in)
1937
83.1 mm (3.3 in)
1938
63.8 mm (2.5 in)
1939
42.9 mm (1.7 in)
1940
51.8 mm (2.0 in)
1941
40.1 mm (1.6 in)
1942
135.1 mm (5.3 in)
1943
66.3 mm (2.6 in)
1944
41.7 mm (1.6 in)
1945
90.2 mm (3.6 in)
1946
62.0 mm (2.4 in)
1947
55.4 mm (2.2 in)
1948
67.1 mm (2.6 in)
1949
42.4 mm (1.7 in)
1950
80.8 mm (3.2 in)
1951
105.4 mm (4.1 in)
1952
123.2 mm (4.9 in)
1953
73.9 mm (2.9 in)
1954
39.1 mm (1.5 in)
1955
120.1 mm (4.7 in)
1956
50.3 mm (2.0 in)
1957
101.3 mm (4.0 in)
1958
41.7 mm (1.6 in)
1959
71.9 mm (2.8 in)
1960
82.0 mm (3.2 in)
1961
59.7 mm (2.4 in)
1962
60.5 mm (2.4 in)
1963
40.4 mm (1.6 in)
1964
40.6 mm (1.6 in)
1965
54.9 mm (2.2 in)
1966
38.9 mm (1.5 in)
1967
58.9 mm (2.3 in)
1968
52.8 mm (2.1 in)
1969
50.5 mm (2.0 in)
1970
91.7 mm (3.6 in)
1971
56.1 mm (2.2 in)
1972
74.9 mm (2.9 in)
1973
67.8 mm (2.7 in)
1974
68.3 mm (2.7 in)
1975
80.8 mm (3.2 in)
1976
48.5 mm (1.9 in)
1977
58.9 mm (2.3 in)
1978
48.0 mm (1.9 in)
1979
70.1 mm (2.8 in)
1980
43.9 mm (1.7 in)
1981
59.4 mm (2.3 in)
1982
77.7 mm (3.1 in)
1983
100.1 mm (3.9 in)
1984
90.2 mm (3.6 in)
1985
69.3 mm (2.7 in)
1986
59.9 mm (2.4 in)
1987
141.7 mm (5.6 in)
1988
60.5 mm (2.4 in)
1989
50.8 mm (2.0 in)
1990
60.2 mm (2.4 in)
1991
62.2 mm (2.4 in)
1992
55.9 mm (2.2 in)
1993
62.7 mm (2.5 in)
1994
50.5 mm (2.0 in)
1995
67.8 mm (2.7 in)
1996
101.9 mm (4.0 in)
1997
72.9 mm (2.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Palmerton, 1917 to 1997. The record is 184.7 mm (7.3 in) in 1955, marked on the chart; the median year is 95.0 mm (3.7 in).
Wettest five days (Rx5day) at Palmerton by year
Year
Wettest five days (Rx5day)
1917
111.6 mm (4.4 in)
1918
98.0 mm (3.9 in)
1919
111.4 mm (4.4 in)
1920
81.2 mm (3.2 in)
1921
80.6 mm (3.2 in)
1922
100.9 mm (4.0 in)
1923
82.6 mm (3.3 in)
1924
153.1 mm (6.0 in)
1925
78.8 mm (3.1 in)
1926
88.7 mm (3.5 in)
1927
93.2 mm (3.7 in)
1928
85.1 mm (3.4 in)
1929
117.6 mm (4.6 in)
1930
60.2 mm (2.4 in)
1931
88.7 mm (3.5 in)
1932
115.1 mm (4.5 in)
1933
150.6 mm (5.9 in)
1934
110.4 mm (4.3 in)
1935
149.2 mm (5.9 in)
1936
123.7 mm (4.9 in)
1937
144.5 mm (5.7 in)
1938
132.7 mm (5.2 in)
1939
64.2 mm (2.5 in)
1940
87.7 mm (3.5 in)
1941
50.5 mm (2.0 in)
1942
143.0 mm (5.6 in)
1943
100.4 mm (4.0 in)
1944
75.9 mm (3.0 in)
1945
121.4 mm (4.8 in)
1946
126.6 mm (5.0 in)
1947
102.6 mm (4.0 in)
1948
76.2 mm (3.0 in)
1949
84.3 mm (3.3 in)
1950
100.8 mm (4.0 in)
1951
121.4 mm (4.8 in)
1952
183.9 mm (7.2 in)
1953
102.6 mm (4.0 in)
1954
72.4 mm (2.9 in)
1955
184.7 mm (7.3 in)
1956
109.7 mm (4.3 in)
1957
129.5 mm (5.1 in)
1958
72.9 mm (2.9 in)
1959
129.9 mm (5.1 in)
1960
168.3 mm (6.6 in)
1961
80.7 mm (3.2 in)
1962
80.0 mm (3.1 in)
1963
94.5 mm (3.7 in)
1964
80.5 mm (3.2 in)
1965
60.7 mm (2.4 in)
1966
62.0 mm (2.4 in)
1967
80.0 mm (3.1 in)
1968
67.6 mm (2.7 in)
1969
137.1 mm (5.4 in)
1970
116.5 mm (4.6 in)
1971
107.2 mm (4.2 in)
1972
136.1 mm (5.4 in)
1973
86.1 mm (3.4 in)
1974
85.2 mm (3.4 in)
1975
113.8 mm (4.5 in)
1976
69.6 mm (2.7 in)
1977
73.7 mm (2.9 in)
1978
70.1 mm (2.8 in)
1979
95.0 mm (3.7 in)
1980
63.2 mm (2.5 in)
1981
98.0 mm (3.9 in)
1982
117.1 mm (4.6 in)
1983
123.5 mm (4.9 in)
1984
126.8 mm (5.0 in)
1985
74.7 mm (2.9 in)
1986
41.2 mm (1.6 in)
1987
152.4 mm (6.0 in)
1988
87.7 mm (3.5 in)
1989
107.4 mm (4.2 in)
1990
83.0 mm (3.3 in)
1991
79.0 mm (3.1 in)
1992
77.0 mm (3.0 in)
1993
68.8 mm (2.7 in)
1994
79.8 mm (3.1 in)
1995
87.8 mm (3.5 in)
1996
106.7 mm (4.2 in)
1997
106.2 mm (4.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Palmerton, 1917 to 1997. The record is 43 days in 1924, marked on the chart; the median year is 19 days.
Longest dry spell (CDD) at Palmerton by year
Year
Longest dry spell (CDD)
1917
20 days
1918
17 days
1919
9 days
1920
7 days
1921
14 days
1922
24 days
1923
19 days
1924
43 days
1925
15 days
1926
20 days
1927
16 days
1928
16 days
1929
19 days
1930
22 days
1931
18 days
1932
22 days
1933
19 days
1934
17 days
1935
20 days
1936
15 days
1937
16 days
1938
15 days
1939
25 days
1940
22 days
1941
24 days
1942
25 days
1943
27 days
1944
19 days
1945
12 days
1946
15 days
1947
25 days
1948
15 days
1949
20 days
1950
15 days
1951
12 days
1952
16 days
1953
20 days
1954
11 days
1955
32 days
1956
16 days
1957
16 days
1958
26 days
1959
18 days
1960
13 days
1961
13 days
1962
19 days
1963
28 days
1964
20 days
1965
21 days
1966
33 days
1967
16 days
1968
26 days
1969
21 days
1970
16 days
1971
19 days
1972
10 days
1973
20 days
1974
15 days
1975
12 days
1976
24 days
1977
19 days
1978
21 days
1979
13 days
1980
28 days
1981
24 days
1982
17 days
1983
20 days
1984
17 days
1985
19 days
1986
11 days
1987
24 days
1988
32 days
1989
23 days
1990
12 days
1991
23 days
1992
20 days
1993
18 days
1994
22 days
1995
24 days
1996
20 days
1997
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
58 years with a frost
Across 58 years with a frost, the median last spring frost at Palmerton falls on 4 May and the median first autumn frost on 8 October, which leaves a median of 157 days between them.
Fitted over all years, the growing season changes by +0.3 days per decade at this station.
Frost dates and growing season at Palmerton
Measure
Median, all years
Earliest period
Recent period (1954 to 1997)
Recent against earliest
Fitted trend
Last spring frost
4 May
n/a
4 May
n/a
-0.4 days per decade
First autumn frost
8 October
n/a
6 October
n/a
-0.1 days per decade
Growing days
157 days
n/a
157 days
n/a
+0.3 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
70 years, 1918 to 1997
A day with at least 64.4 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 145.2 mm (5.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Palmerton: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
64.4 mm (2.5 in)
5 years
85.4 mm (3.4 in)
10 years
99.5 mm (3.9 in)
25 years
117.7 mm (4.6 in)
50 years
131.4 mm (5.2 in)
100 years
145.2 mm (5.7 in)
Longer than the 70 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, 70 years of values from 1918 to 1997.
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: 135.1 mm (5.3 in) in 1942; 123.2 mm (4.9 in) in 1952; 120.1 mm (4.7 in) in 1955.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Palmerton standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Palmerton 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.