Record envelope, standing records and threshold days for Coatesville 1 SW (USC00361589), Pennsylvania, United States, with 89 years of record.
Key Facts for Coatesville 1 SW
Coatesville 1 SW (USC00361589) is a weather station in Pennsylvania, United States at 39.97 latitude and -75.83 longitude, 104 m (341 ft) above sea level.
The station reports from 1894 to 1982, 89 years of record.
1,464 records set at Coatesville 1 SW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Coatesville 1 SW tied a daily record high minimum temperature of 8.9 C (48.0 F) on 24 November 1982.
About the Station
Location: Pennsylvania, United States, 39.97 latitude, -75.83 longitude.
Elevation: 104 m (341 ft).
Period of record: 1894 to 1982, 89 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 Coatesville 1 SW. 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 Coatesville 1 SW, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
23.9 C (75.0 F)
-28.3 C (-18.9 F)
n/a
n/a
Feb
25.0 C (77.0 F)
-25.6 C (-14.1 F)
n/a
n/a
Mar
30.6 C (87.1 F)
-18.3 C (-0.9 F)
n/a
n/a
Apr
35.0 C (95.0 F)
-13.9 C (7.0 F)
n/a
n/a
May
35.0 C (95.0 F)
-3.9 C (25.0 F)
n/a
n/a
Jun
37.8 C (100.0 F)
1.1 C (34.0 F)
n/a
n/a
Jul
40.0 C (104.0 F)
6.1 C (43.0 F)
n/a
n/a
Aug
41.7 C (107.1 F)
3.3 C (37.9 F)
n/a
n/a
Sep
38.9 C (102.0 F)
-1.1 C (30.0 F)
n/a
n/a
Oct
34.4 C (93.9 F)
-8.3 C (17.1 F)
n/a
n/a
Nov
28.9 C (84.0 F)
-15.0 C (5.0 F)
n/a
n/a
Dec
21.7 C (71.1 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 Coatesville 1 SW still stand. 1896 holds the most, with 43.
Standing records at Coatesville 1 SW by the year they were set
Year set
Standing records
1894
20
1895
31
1896
43
1897
14
1898
20
1899
25
1900
30
1901
23
1902
9
1903
15
1904
16
1905
13
1906
18
1907
16
1908
13
1909
15
1910
13
1911
15
1912
20
1913
18
1914
21
1915
15
1916
13
1917
24
1918
24
1919
14
1920
8
1921
22
1922
17
1923
22
1924
14
1925
27
1926
28
1927
14
1928
22
1929
34
1930
39
1931
12
1932
16
1933
18
1934
20
1935
9
1936
17
1937
16
1938
21
1939
10
1940
21
1941
14
1942
26
1943
20
1944
16
1945
22
1946
15
1947
14
1948
4
1949
9
1950
22
1951
15
1952
14
1953
15
1954
13
1955
8
1956
12
1957
10
1958
7
1959
10
1960
17
1961
7
1962
17
1963
17
1964
17
1965
10
1966
11
1967
15
1968
7
1969
6
1970
14
1971
5
1972
12
1973
12
1974
18
1975
8
1976
22
1977
8
1978
12
1979
25
1980
13
1981
6
1982
14
All-Time Record Progression
4 new records
4 all-time records were set at Coatesville 1 SW between 17 August 1928 and 18 January 1982. Each dot is a new record.
When Coatesville 1 SW set new all-time records
Date
Kind
Detail
1928-08-17
Record daily precipitation
Record daily precipitation 134.1 mm (5.3 in)
1942-08-09
Record daily precipitation
Record daily precipitation 141.5 mm (5.6 in)
1945-07-01
Record high minimum temperature
Record high minimum temperature 26.7 C (80.1 F)
1982-01-18
Record low maximum temperature
Record low maximum temperature -16.7 C (1.9 F)
Wettest Day of Each Month
Aug: 141.5 mm (5.6 in)
The wettest day on record for each calendar month at Coatesville 1 SW. The most was 141.5 mm (5.6 in) on 9 August 1942.
Record daily precipitation for each month at Coatesville 1 SW
Month
Record daily precipitation (mm)
Date
Jan
70.1 mm (2.8 in)
25 January 1979
Feb
89.7 mm (3.5 in)
13 February 1899
Mar
80.0 mm (3.1 in)
20 March 1958
Apr
61.5 mm (2.4 in)
16 April 1929
May
124.2 mm (4.9 in)
20 May 1894
Jun
95.3 mm (3.8 in)
23 June 1972
Jul
121.4 mm (4.8 in)
21 July 1979
Aug
141.5 mm (5.6 in)
9 August 1942
Sep
109.2 mm (4.3 in)
22 September 1979
Oct
81.0 mm (3.2 in)
10 October 1894
Nov
86.4 mm (3.4 in)
17 November 1935
Dec
106.9 mm (4.2 in)
13 December 1909
Period of Record Coverage
1894 to 1982
Complete yearUnder 90 percent of days
89 years of record at Coatesville 1 SW, 1894 to 1982. Every year has data for at least 90 percent of its days.
Cooler than the station meanWarmer than the station mean
One stripe for each of 83 complete years at Coatesville 1 SW, 1894 to 1981. Blue stripes are years cooler than the station's own mean of 11.2 C (52.1 F); red stripes are warmer. The coolest year was 1940, at 9.5 C (49.0 F), and the warmest was 1913, at 12.7 C (54.8 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Coatesville 1 SW as warming stripes, 1894 to 1981
Year
Annual mean temperature
Difference from the station mean
1894
11.6 C
+0.40 C
1896
11.3 C
+0.12 C
1897
11.6 C
+0.42 C
1898
12.2 C
+1.06 C
1899
11.6 C
+0.43 C
1900
12.7 C
+1.52 C
1901
11.3 C
+0.18 C
1902
11.4 C
+0.21 C
1904
9.8 C
-1.37 C
1906
12.0 C
+0.85 C
1907
10.4 C
-0.73 C
1908
11.9 C
+0.70 C
1909
11.5 C
+0.32 C
1910
11.4 C
+0.23 C
1911
12.0 C
+0.88 C
1912
11.1 C
-0.09 C
1913
12.7 C
+1.53 C
1914
11.1 C
-0.11 C
1915
11.5 C
+0.33 C
1916
11.2 C
0.00 C
1917
10.4 C
-0.76 C
1918
11.7 C
+0.54 C
1919
12.1 C
+0.98 C
1920
11.1 C
-0.04 C
1921
12.7 C
+1.52 C
1922
11.5 C
+0.34 C
1923
10.9 C
-0.31 C
1924
9.9 C
-1.29 C
1925
10.7 C
-0.47 C
1926
9.5 C
-1.64 C
1927
10.9 C
-0.23 C
1928
10.8 C
-0.32 C
1929
11.0 C
-0.13 C
1930
11.5 C
+0.34 C
1931
12.6 C
+1.47 C
1932
12.0 C
+0.83 C
1933
11.8 C
+0.65 C
1934
11.0 C
-0.12 C
1935
11.0 C
-0.13 C
1936
10.9 C
-0.30 C
1937
11.1 C
-0.11 C
1938
11.6 C
+0.44 C
1939
11.2 C
+0.03 C
1940
9.5 C
-1.69 C
1941
12.0 C
+0.88 C
1942
11.9 C
+0.74 C
1943
11.8 C
+0.67 C
1944
12.1 C
+0.94 C
1945
11.9 C
+0.74 C
1946
12.0 C
+0.79 C
1947
10.9 C
-0.26 C
1948
10.8 C
-0.41 C
1949
11.8 C
+0.67 C
1950
10.5 C
-0.63 C
1951
11.1 C
-0.02 C
1952
11.3 C
+0.18 C
1953
12.0 C
+0.86 C
1954
11.2 C
+0.07 C
1955
11.2 C
+0.06 C
1956
10.7 C
-0.48 C
1957
11.4 C
+0.23 C
1958
10.0 C
-1.13 C
1959
11.8 C
+0.68 C
1960
10.9 C
-0.22 C
1961
11.2 C
+0.04 C
1962
10.5 C
-0.69 C
1963
10.3 C
-0.84 C
1964
10.9 C
-0.23 C
1965
10.9 C
-0.26 C
1966
10.8 C
-0.39 C
1967
10.5 C
-0.62 C
1969
10.7 C
-0.48 C
1970
10.8 C
-0.40 C
1971
10.9 C
-0.28 C
1972
10.1 C
-1.03 C
1973
11.3 C
+0.15 C
1975
10.6 C
-0.55 C
1976
10.1 C
-1.04 C
1977
10.5 C
-0.65 C
1978
9.7 C
-1.45 C
1979
10.6 C
-0.60 C
1980
10.6 C
-0.52 C
1981
10.3 C
-0.82 C
The annual mean temperature here has fallen by 0.1 C (0.1 to 0.2) per decade over 1894 to 1981. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 83 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Coatesville 1 SW
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.1 C (-0.2 to -0.1) per decade
-0.2 F (-0.3 to -0.1) per decade
1894 to 1981
83
Fall
Mean daily maximum
-0.08 C (-0.15 to -0.01) per decade
-0.15 F (-0.27 to -0.03) per decade
1894 to 1981
83
Fall
Mean daily minimum
-0.2 C (-0.2 to -0.1) per decade
-0.3 F (-0.4 to -0.2) per decade
1894 to 1981
83
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
1894 to 1982
Yearly extremes at Coatesville 1 SW: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.7 C (107.1 F)
1918
36.1 C (97.0 F)
89
Coldest night (TNn)
-28.3 C (-18.9 F)
1912
-18.3 C (-0.9 F)
89
Wettest day (Rx1day)
141.5 mm (5.6 in)
1942
68.6 mm (2.7 in)
89
Wettest five days (Rx5day)
249.2 mm (9.8 in)
1955
99.1 mm (3.9 in)
89
Longest dry spell (CDD)
34 days
1924
17 days
89
Hottest day (TXx)
The hottest day of the year at Coatesville 1 SW, 1894 to 1982. The record is 41.7 C (107.1 F) in 1918, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Coatesville 1 SW by year
Year
Hottest day (TXx)
1894
36.7 C (98.1 F)
1895
37.8 C (100.0 F)
1896
37.2 C (99.0 F)
1897
37.2 C (99.0 F)
1898
38.3 C (100.9 F)
1899
37.8 C (100.0 F)
1900
38.9 C (102.0 F)
1901
39.4 C (102.9 F)
1902
35.6 C (96.1 F)
1903
36.1 C (97.0 F)
1904
35.6 C (96.1 F)
1905
36.7 C (98.1 F)
1906
35.0 C (95.0 F)
1907
33.9 C (93.0 F)
1908
36.1 C (97.0 F)
1909
37.2 C (99.0 F)
1910
35.6 C (96.1 F)
1911
38.9 C (102.0 F)
1912
35.6 C (96.1 F)
1913
36.7 C (98.1 F)
1914
36.7 C (98.1 F)
1915
35.6 C (96.1 F)
1916
37.2 C (99.0 F)
1917
38.3 C (100.9 F)
1918
41.7 C (107.1 F)
1919
38.9 C (102.0 F)
1920
35.6 C (96.1 F)
1921
36.1 C (97.0 F)
1922
35.0 C (95.0 F)
1923
36.7 C (98.1 F)
1924
36.1 C (97.0 F)
1925
36.1 C (97.0 F)
1926
36.7 C (98.1 F)
1927
34.4 C (93.9 F)
1928
34.4 C (93.9 F)
1929
35.0 C (95.0 F)
1930
38.9 C (102.0 F)
1931
36.7 C (98.1 F)
1932
35.6 C (96.1 F)
1933
37.2 C (99.0 F)
1934
37.8 C (100.0 F)
1935
35.6 C (96.1 F)
1936
40.0 C (104.0 F)
1937
36.1 C (97.0 F)
1938
35.6 C (96.1 F)
1939
36.1 C (97.0 F)
1940
37.2 C (99.0 F)
1941
38.3 C (100.9 F)
1942
36.7 C (98.1 F)
1943
37.2 C (99.0 F)
1944
36.7 C (98.1 F)
1945
36.7 C (98.1 F)
1946
35.6 C (96.1 F)
1947
34.4 C (93.9 F)
1948
36.1 C (97.0 F)
1949
37.2 C (99.0 F)
1950
33.9 C (93.0 F)
1951
33.3 C (91.9 F)
1952
36.7 C (98.1 F)
1953
38.9 C (102.0 F)
1954
38.9 C (102.0 F)
1955
37.8 C (100.0 F)
1956
35.0 C (95.0 F)
1957
37.2 C (99.0 F)
1958
34.4 C (93.9 F)
1959
36.7 C (98.1 F)
1960
33.9 C (93.0 F)
1961
35.0 C (95.0 F)
1962
35.0 C (95.0 F)
1963
36.7 C (98.1 F)
1964
36.1 C (97.0 F)
1965
35.0 C (95.0 F)
1966
38.9 C (102.0 F)
1967
35.6 C (96.1 F)
1968
35.0 C (95.0 F)
1969
35.0 C (95.0 F)
1970
33.9 C (93.0 F)
1971
33.3 C (91.9 F)
1972
35.0 C (95.0 F)
1973
36.7 C (98.1 F)
1974
35.0 C (95.0 F)
1975
34.4 C (93.9 F)
1976
34.4 C (93.9 F)
1977
35.0 C (95.0 F)
1978
35.0 C (95.0 F)
1979
33.3 C (91.9 F)
1980
36.7 C (98.1 F)
1981
34.4 C (93.9 F)
1982
34.4 C (93.9 F)
Coldest night (TNn)
The coldest night of the year at Coatesville 1 SW, 1894 to 1982. The record is -28.3 C (-18.9 F) in 1912, marked on the chart; the median year is -18.3 C (-0.9 F).
Coldest night (TNn) at Coatesville 1 SW by year
Year
Coldest night (TNn)
1894
-16.7 C (1.9 F)
1895
-21.1 C (-6.0 F)
1896
-18.3 C (-0.9 F)
1897
-16.1 C (3.0 F)
1898
-18.3 C (-0.9 F)
1899
-25.0 C (-13.0 F)
1900
-19.4 C (-2.9 F)
1901
-15.0 C (5.0 F)
1902
-15.0 C (5.0 F)
1903
-21.7 C (-7.1 F)
1904
-21.7 C (-7.1 F)
1905
-20.0 C (-4.0 F)
1906
-15.6 C (3.9 F)
1907
-17.8 C (0.0 F)
1908
-18.3 C (-0.9 F)
1909
-16.7 C (1.9 F)
1910
-18.9 C (-2.0 F)
1911
-12.8 C (9.0 F)
1912
-28.3 C (-18.9 F)
1913
-15.0 C (5.0 F)
1914
-21.1 C (-6.0 F)
1915
-13.3 C (8.1 F)
1916
-20.0 C (-4.0 F)
1917
-22.8 C (-9.0 F)
1918
-23.9 C (-11.0 F)
1919
-20.0 C (-4.0 F)
1920
-18.9 C (-2.0 F)
1921
-17.2 C (1.0 F)
1922
-19.4 C (-2.9 F)
1923
-16.7 C (1.9 F)
1924
-17.2 C (1.0 F)
1925
-25.0 C (-13.0 F)
1926
-17.2 C (1.0 F)
1927
-18.9 C (-2.0 F)
1928
-21.7 C (-7.1 F)
1929
-17.2 C (1.0 F)
1930
-22.2 C (-8.0 F)
1931
-11.7 C (10.9 F)
1932
-13.3 C (8.1 F)
1933
-18.3 C (-0.9 F)
1934
-25.6 C (-14.1 F)
1935
-22.2 C (-8.0 F)
1936
-20.6 C (-5.1 F)
1937
-11.7 C (10.9 F)
1938
-15.0 C (5.0 F)
1939
-14.4 C (6.1 F)
1940
-18.9 C (-2.0 F)
1941
-12.8 C (9.0 F)
1942
-18.9 C (-2.0 F)
1943
-17.8 C (0.0 F)
1944
-13.9 C (7.0 F)
1945
-18.3 C (-0.9 F)
1946
-12.8 C (9.0 F)
1947
-16.1 C (3.0 F)
1948
-18.9 C (-2.0 F)
1949
-16.1 C (3.0 F)
1950
-17.8 C (0.0 F)
1951
-17.2 C (1.0 F)
1952
-13.9 C (7.0 F)
1953
-12.2 C (10.0 F)
1954
-19.4 C (-2.9 F)
1955
-18.9 C (-2.0 F)
1956
-13.9 C (7.0 F)
1957
-20.0 C (-4.0 F)
1958
-16.1 C (3.0 F)
1959
-16.1 C (3.0 F)
1960
-18.3 C (-0.9 F)
1961
-22.2 C (-8.0 F)
1962
-18.9 C (-2.0 F)
1963
-19.4 C (-2.9 F)
1964
-18.3 C (-0.9 F)
1965
-18.9 C (-2.0 F)
1966
-16.7 C (1.9 F)
1967
-18.3 C (-0.9 F)
1968
-18.9 C (-2.0 F)
1969
-13.3 C (8.1 F)
1970
-18.3 C (-0.9 F)
1971
-17.8 C (0.0 F)
1972
-17.2 C (1.0 F)
1973
-16.1 C (3.0 F)
1974
-15.6 C (3.9 F)
1975
-13.3 C (8.1 F)
1976
-17.2 C (1.0 F)
1977
-22.2 C (-8.0 F)
1978
-18.9 C (-2.0 F)
1979
-22.8 C (-9.0 F)
1980
-21.1 C (-6.0 F)
1981
-21.7 C (-7.1 F)
1982
-25.0 C (-13.0 F)
Wettest day (Rx1day)
The wettest day of the year at Coatesville 1 SW, 1894 to 1982. The record is 141.5 mm (5.6 in) in 1942, marked on the chart; the median year is 68.6 mm (2.7 in).
Wettest day (Rx1day) at Coatesville 1 SW by year
Year
Wettest day (Rx1day)
1894
124.2 mm (4.9 in)
1895
46.0 mm (1.8 in)
1896
76.2 mm (3.0 in)
1897
52.3 mm (2.1 in)
1898
52.1 mm (2.1 in)
1899
89.7 mm (3.5 in)
1900
87.9 mm (3.5 in)
1901
88.4 mm (3.5 in)
1902
63.2 mm (2.5 in)
1903
66.3 mm (2.6 in)
1904
79.5 mm (3.1 in)
1905
64.5 mm (2.5 in)
1906
57.4 mm (2.3 in)
1907
95.5 mm (3.8 in)
1908
73.9 mm (2.9 in)
1909
106.9 mm (4.2 in)
1910
46.2 mm (1.8 in)
1911
91.4 mm (3.6 in)
1912
71.4 mm (2.8 in)
1913
48.8 mm (1.9 in)
1914
88.1 mm (3.5 in)
1915
88.9 mm (3.5 in)
1916
69.1 mm (2.7 in)
1917
51.6 mm (2.0 in)
1918
40.9 mm (1.6 in)
1919
47.2 mm (1.9 in)
1920
57.4 mm (2.3 in)
1921
58.2 mm (2.3 in)
1922
53.8 mm (2.1 in)
1923
46.5 mm (1.8 in)
1924
68.3 mm (2.7 in)
1925
45.0 mm (1.8 in)
1926
52.8 mm (2.1 in)
1927
73.9 mm (2.9 in)
1928
134.1 mm (5.3 in)
1929
80.8 mm (3.2 in)
1930
59.2 mm (2.3 in)
1931
82.0 mm (3.2 in)
1932
57.4 mm (2.3 in)
1933
85.9 mm (3.4 in)
1934
46.7 mm (1.8 in)
1935
86.4 mm (3.4 in)
1936
52.6 mm (2.1 in)
1937
62.7 mm (2.5 in)
1938
85.1 mm (3.4 in)
1939
126.5 mm (5.0 in)
1940
76.2 mm (3.0 in)
1941
48.8 mm (1.9 in)
1942
141.5 mm (5.6 in)
1943
64.8 mm (2.6 in)
1944
50.8 mm (2.0 in)
1945
99.1 mm (3.9 in)
1946
102.6 mm (4.0 in)
1947
79.2 mm (3.1 in)
1948
53.1 mm (2.1 in)
1949
69.1 mm (2.7 in)
1950
52.8 mm (2.1 in)
1951
52.1 mm (2.1 in)
1952
78.0 mm (3.1 in)
1953
45.7 mm (1.8 in)
1954
47.0 mm (1.9 in)
1955
132.6 mm (5.2 in)
1956
70.6 mm (2.8 in)
1957
71.1 mm (2.8 in)
1958
80.0 mm (3.1 in)
1959
50.8 mm (2.0 in)
1960
85.1 mm (3.4 in)
1961
34.3 mm (1.4 in)
1962
51.8 mm (2.0 in)
1963
73.7 mm (2.9 in)
1964
53.6 mm (2.1 in)
1965
74.9 mm (2.9 in)
1966
89.7 mm (3.5 in)
1967
55.4 mm (2.2 in)
1968
83.8 mm (3.3 in)
1969
76.2 mm (3.0 in)
1970
63.0 mm (2.5 in)
1971
133.4 mm (5.3 in)
1972
95.3 mm (3.8 in)
1973
61.0 mm (2.4 in)
1974
54.6 mm (2.1 in)
1975
68.6 mm (2.7 in)
1976
63.0 mm (2.5 in)
1977
55.9 mm (2.2 in)
1978
83.3 mm (3.3 in)
1979
121.4 mm (4.8 in)
1980
58.7 mm (2.3 in)
1981
97.3 mm (3.8 in)
1982
45.0 mm (1.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Coatesville 1 SW, 1894 to 1982. The record is 249.2 mm (9.8 in) in 1955, marked on the chart; the median year is 99.1 mm (3.9 in).
Wettest five days (Rx5day) at Coatesville 1 SW by year
Year
Wettest five days (Rx5day)
1894
245.2 mm (9.7 in)
1895
54.7 mm (2.2 in)
1896
103.1 mm (4.1 in)
1897
87.4 mm (3.4 in)
1898
75.5 mm (3.0 in)
1899
163.6 mm (6.4 in)
1900
87.9 mm (3.5 in)
1901
130.1 mm (5.1 in)
1902
124.2 mm (4.9 in)
1903
144.6 mm (5.7 in)
1904
129.5 mm (5.1 in)
1905
82.3 mm (3.2 in)
1906
119.9 mm (4.7 in)
1907
111.3 mm (4.4 in)
1908
86.1 mm (3.4 in)
1909
106.9 mm (4.2 in)
1910
94.2 mm (3.7 in)
1911
161.7 mm (6.4 in)
1912
91.0 mm (3.6 in)
1913
87.2 mm (3.4 in)
1914
103.4 mm (4.1 in)
1915
126.9 mm (5.0 in)
1916
125.2 mm (4.9 in)
1917
69.3 mm (2.7 in)
1918
71.3 mm (2.8 in)
1919
174.4 mm (6.9 in)
1920
84.1 mm (3.3 in)
1921
80.5 mm (3.2 in)
1922
76.5 mm (3.0 in)
1923
96.5 mm (3.8 in)
1924
115.0 mm (4.5 in)
1925
60.1 mm (2.4 in)
1926
72.6 mm (2.9 in)
1927
74.7 mm (2.9 in)
1928
134.6 mm (5.3 in)
1929
121.7 mm (4.8 in)
1930
72.7 mm (2.9 in)
1931
127.2 mm (5.0 in)
1932
79.5 mm (3.1 in)
1933
193.1 mm (7.6 in)
1934
80.5 mm (3.2 in)
1935
134.1 mm (5.3 in)
1936
85.8 mm (3.4 in)
1937
120.2 mm (4.7 in)
1938
194.1 mm (7.6 in)
1939
159.2 mm (6.3 in)
1940
79.0 mm (3.1 in)
1941
69.4 mm (2.7 in)
1942
208.1 mm (8.2 in)
1943
102.4 mm (4.0 in)
1944
95.8 mm (3.8 in)
1945
132.9 mm (5.2 in)
1946
131.8 mm (5.2 in)
1947
86.3 mm (3.4 in)
1948
83.0 mm (3.3 in)
1949
80.8 mm (3.2 in)
1950
99.1 mm (3.9 in)
1951
83.6 mm (3.3 in)
1952
122.8 mm (4.8 in)
1953
89.8 mm (3.5 in)
1954
58.7 mm (2.3 in)
1955
249.2 mm (9.8 in)
1956
104.3 mm (4.1 in)
1957
87.1 mm (3.4 in)
1958
117.8 mm (4.6 in)
1959
127.2 mm (5.0 in)
1960
193.6 mm (7.6 in)
1961
79.3 mm (3.1 in)
1962
59.9 mm (2.4 in)
1963
105.5 mm (4.2 in)
1964
75.2 mm (3.0 in)
1965
85.5 mm (3.4 in)
1966
104.5 mm (4.1 in)
1967
78.2 mm (3.1 in)
1968
143.7 mm (5.7 in)
1969
106.7 mm (4.2 in)
1970
82.0 mm (3.2 in)
1971
162.6 mm (6.4 in)
1972
163.7 mm (6.4 in)
1973
98.3 mm (3.9 in)
1974
82.8 mm (3.3 in)
1975
139.5 mm (5.5 in)
1976
84.9 mm (3.3 in)
1977
95.0 mm (3.7 in)
1978
102.1 mm (4.0 in)
1979
209.0 mm (8.2 in)
1980
98.6 mm (3.9 in)
1981
104.9 mm (4.1 in)
1982
92.7 mm (3.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Coatesville 1 SW, 1894 to 1982. The record is 34 days in 1924, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Coatesville 1 SW by year
Year
Longest dry spell (CDD)
1894
18 days
1895
17 days
1896
14 days
1897
17 days
1898
14 days
1899
20 days
1900
19 days
1901
28 days
1902
16 days
1903
18 days
1904
18 days
1905
11 days
1906
15 days
1907
13 days
1908
21 days
1909
24 days
1910
14 days
1911
21 days
1912
12 days
1913
14 days
1914
24 days
1915
14 days
1916
15 days
1917
22 days
1918
23 days
1919
12 days
1920
25 days
1921
19 days
1922
13 days
1923
16 days
1924
34 days
1925
16 days
1926
14 days
1927
18 days
1928
11 days
1929
20 days
1930
21 days
1931
18 days
1932
16 days
1933
15 days
1934
19 days
1935
18 days
1936
16 days
1937
14 days
1938
13 days
1939
18 days
1940
17 days
1941
28 days
1942
13 days
1943
18 days
1944
19 days
1945
16 days
1946
17 days
1947
33 days
1948
16 days
1949
20 days
1950
15 days
1951
13 days
1952
16 days
1953
18 days
1954
23 days
1955
21 days
1956
13 days
1957
16 days
1958
20 days
1959
13 days
1960
18 days
1961
15 days
1962
19 days
1963
31 days
1964
27 days
1965
16 days
1966
18 days
1967
19 days
1968
26 days
1969
17 days
1970
16 days
1971
22 days
1972
13 days
1973
18 days
1974
16 days
1975
13 days
1976
24 days
1977
19 days
1978
16 days
1979
11 days
1980
23 days
1981
15 days
1982
16 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
83 years with a frost
Across 83 years with a frost, the median last spring frost at Coatesville 1 SW falls on 22 April and the median first autumn frost on 13 October, which leaves a median of 175 days between them.
In 1950 to 1981 the median growing season was 171 days. That is 6 days fewer than in 1894 to 1926.
Fitted over all years, the growing season changes by -0.3 days per decade at this station.
Frost dates and growing season at Coatesville 1 SW
Measure
Median, all years
Earliest period (1894 to 1926)
Recent period (1950 to 1981)
Recent against earliest
Fitted trend
Last spring frost
22 April
18 April
23 April
5 days later
+0.6 days per decade
First autumn frost
13 October
12 October
11 October
1 day earlier
+0.2 days per decade
Growing days
175 days
177 days
171 days
6 days fewer
-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
89 years, 1894 to 1982
A day with at least 67.4 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 155.3 mm (6.1 in) of rain is expected about once in 100 years.
Rainfall return levels at Coatesville 1 SW: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
67.4 mm (2.7 in)
5 years
88.5 mm (3.5 in)
10 years
103.4 mm (4.1 in)
25 years
123.3 mm (4.9 in)
50 years
139.0 mm (5.5 in)
100 years
155.3 mm (6.1 in)
Longer than the 89 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, 89 years of values from 1894 to 1982.
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: 141.5 mm (5.6 in) in 1942; 134.1 mm (5.3 in) in 1928; 133.4 mm (5.3 in) in 1971.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Coatesville 1 SW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Coatesville 1 SW 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.