Record envelope, standing records and threshold days for Coleman 3 WNW (USC00181980), Maryland, United States, with 73 years of record.
Key Facts for Coleman 3 WNW
Coleman 3 WNW (USC00181980) is a weather station in Maryland, United States at 39.35 latitude and -76.13 longitude, 24 m (79 ft) above sea level.
The station reports from 1899 to 1971, 73 years of record.
1,464 records set at Coleman 3 WNW still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Coleman 3 WNW set a daily record precipitation of 45.0 mm (1.8 in) on 28 August 1971.
About the Station
Location: Maryland, United States, 39.35 latitude, -76.13 longitude.
Elevation: 24 m (79 ft).
Period of record: 1899 to 1971, 73 years.
Eligible elements: tmax, tmin, prcp, snow.
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 Coleman 3 WNW. 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 Coleman 3 WNW, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
25.6 C (78.1 F)
-21.1 C (-6.0 F)
n/a
n/a
Feb
26.7 C (80.1 F)
-23.9 C (-11.0 F)
n/a
n/a
Mar
32.8 C (91.0 F)
-12.8 C (9.0 F)
n/a
n/a
Apr
33.3 C (91.9 F)
-10.6 C (12.9 F)
n/a
n/a
May
35.6 C (96.1 F)
1.1 C (34.0 F)
n/a
n/a
Jun
38.3 C (100.9 F)
5.0 C (41.0 F)
n/a
n/a
Jul
40.6 C (105.1 F)
10.0 C (50.0 F)
n/a
n/a
Aug
41.1 C (106.0 F)
8.3 C (46.9 F)
n/a
n/a
Sep
37.8 C (100.0 F)
2.8 C (37.0 F)
n/a
n/a
Oct
36.1 C (97.0 F)
-2.8 C (27.0 F)
n/a
n/a
Nov
31.1 C (88.0 F)
-11.1 C (12.0 F)
n/a
n/a
Dec
21.7 C (71.1 F)
-19.4 C (-2.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Coleman 3 WNW still stand. 1930 holds the most, with 41.
Standing records at Coleman 3 WNW by the year they were set
Year set
Standing records
1899
18
1900
8
1902
7
1903
26
1904
36
1905
26
1906
26
1907
33
1908
16
1909
17
1910
14
1911
22
1912
19
1913
28
1914
28
1915
6
1916
3
1917
25
1918
27
1919
15
1920
19
1921
23
1922
17
1923
17
1924
12
1925
35
1926
24
1927
25
1928
25
1929
34
1930
41
1931
16
1932
23
1933
30
1934
26
1935
20
1936
31
1937
19
1938
17
1939
12
1940
31
1941
22
1942
14
1943
17
1944
10
1945
33
1946
24
1947
29
1948
28
1949
29
1950
20
1951
11
1952
16
1953
21
1954
22
1955
22
1956
22
1957
19
1958
7
1959
14
1960
18
1961
15
1962
15
1963
21
1964
16
1965
20
1966
23
1967
15
1968
11
1969
5
1970
23
1971
5
All-Time Record Progression
2 new records
2 all-time records were set at Coleman 3 WNW between 9 February 1934 and 13 August 1955. Each dot is a new record.
When Coleman 3 WNW set new all-time records
Date
Kind
Detail
1934-02-09
Record low minimum temperature
Record low minimum temperature -23.9 C (-11.0 F)
1955-08-13
Record daily precipitation
Record daily precipitation 137.9 mm (5.4 in)
Wettest Day of Each Month
Aug: 137.9 mm (5.4 in)
The wettest day on record for each calendar month at Coleman 3 WNW. The most was 137.9 mm (5.4 in) on 13 August 1955.
Record daily precipitation for each month at Coleman 3 WNW
Month
Record daily precipitation (mm)
Date
Jan
63.5 mm (2.5 in)
11 January 1901
Feb
48.8 mm (1.9 in)
13 February 1923
Mar
94.7 mm (3.7 in)
15 March 1912
Apr
69.9 mm (2.8 in)
29 April 1923
May
78.0 mm (3.1 in)
7 May 1935
Jun
89.4 mm (3.5 in)
19 June 1967
Jul
115.3 mm (4.5 in)
13 July 1901
Aug
137.9 mm (5.4 in)
13 August 1955
Sep
128.5 mm (5.1 in)
14 September 1904
Oct
97.8 mm (3.9 in)
19 October 1966
Nov
93.7 mm (3.7 in)
6 November 1907
Dec
86.9 mm (3.4 in)
13 December 1909
Period of Record Coverage
1899 to 1971
Complete yearUnder 90 percent of days
72 years of record at Coleman 3 WNW, 1899 to 1971. 12 years have data for under 90 percent of days and are left out of rankings: 1899, 1900, 1902, 1908, 1910, 1912, 1914, 1915 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 54 complete years at Coleman 3 WNW, 1903 to 1970. Blue stripes are years cooler than the station's own mean of 13.2 C (55.7 F); red stripes are warmer. The coolest year was 1904, at 11.2 C (52.2 F), and the warmest was 1949, at 15.0 C (59.0 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Coleman 3 WNW as warming stripes, 1903 to 1970
Year
Annual mean temperature
Difference from the station mean
1903
12.6 C
-0.58 C
1904
11.2 C
-1.96 C
1905
12.4 C
-0.84 C
1906
13.3 C
+0.11 C
1907
11.9 C
-1.29 C
1909
13.0 C
-0.16 C
1911
13.2 C
+0.00 C
1913
14.0 C
+0.80 C
1917
11.7 C
-1.53 C
1920
12.6 C
-0.64 C
1921
14.3 C
+1.08 C
1922
13.6 C
+0.36 C
1923
13.1 C
-0.07 C
1925
13.2 C
-0.03 C
1926
11.9 C
-1.27 C
1927
12.9 C
-0.26 C
1928
13.1 C
-0.10 C
1929
13.2 C
+0.05 C
1930
13.5 C
+0.31 C
1931
14.0 C
+0.82 C
1932
13.4 C
+0.20 C
1933
13.1 C
-0.05 C
1935
12.3 C
-0.90 C
1936
12.7 C
-0.52 C
1937
13.0 C
-0.24 C
1938
13.5 C
+0.27 C
1939
13.2 C
+0.02 C
1940
11.6 C
-1.60 C
1941
13.5 C
+0.28 C
1942
13.0 C
-0.15 C
1943
12.9 C
-0.27 C
1944
13.0 C
-0.23 C
1945
13.6 C
+0.36 C
1946
14.3 C
+1.12 C
1947
13.4 C
+0.25 C
1948
13.6 C
+0.44 C
1949
15.0 C
+1.80 C
1950
13.4 C
+0.18 C
1952
14.1 C
+0.92 C
1953
14.8 C
+1.61 C
1955
14.1 C
+0.91 C
1956
13.4 C
+0.21 C
1957
14.1 C
+0.86 C
1958
12.7 C
-0.49 C
1959
14.3 C
+1.15 C
1960
13.3 C
+0.13 C
1961
13.5 C
+0.28 C
1962
12.9 C
-0.32 C
1963
12.8 C
-0.37 C
1965
13.1 C
-0.12 C
1967
12.6 C
-0.56 C
1968
13.3 C
+0.09 C
1969
13.0 C
-0.18 C
1970
13.3 C
+0.09 C
The annual mean temperature here has risen by 0.14 C (0.03 to 0.24) per decade over 1903 to 1970. In Fahrenheit: 0.2 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 54 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Coleman 3 WNW
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.14 C (0.03 to 0.24) per decade
0.2 F (0.1 to 0.4) per decade
1903 to 1970
54
Rise
Mean daily maximum
0.2 C (0.1 to 0.3) per decade
0.4 F (0.1 to 0.6) per decade
1903 to 1970
54
Rise
Mean daily minimum
0.07 C (-0.03 to 0.16) per decade
0.1 F (-0.1 to 0.3) per decade
1903 to 1970
54
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
1899 to 1971
Yearly extremes at Coleman 3 WNW: 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
36.7 C (98.1 F)
72
Coldest night (TNn)
-23.9 C (-11.0 F)
1934
-14.4 C (6.1 F)
71
Wettest day (Rx1day)
137.9 mm (5.4 in)
1955
67.3 mm (2.6 in)
73
Wettest five days (Rx5day)
199.7 mm (7.9 in)
1955
103.5 mm (4.1 in)
73
Longest dry spell (CDD)
35 days
1919
18 days
73
Hottest day (TXx)
The hottest day of the year at Coleman 3 WNW, 1899 to 1971. The record is 41.1 C (106.0 F) in 1918, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Coleman 3 WNW by year
Year
Hottest day (TXx)
1899
36.7 C (98.1 F)
1900
33.9 C (93.0 F)
1901
n/a
1902
32.2 C (90.0 F)
1903
36.1 C (97.0 F)
1904
35.6 C (96.1 F)
1905
35.6 C (96.1 F)
1906
33.9 C (93.0 F)
1907
34.4 C (93.9 F)
1908
37.2 C (99.0 F)
1909
37.2 C (99.0 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
37.8 C (100.0 F)
1915
32.2 C (90.0 F)
1916
30.0 C (86.0 F)
1917
36.7 C (98.1 F)
1918
41.1 C (106.0 F)
1919
34.4 C (93.9 F)
1920
35.0 C (95.0 F)
1921
35.6 C (96.1 F)
1922
34.4 C (93.9 F)
1923
36.7 C (98.1 F)
1924
37.8 C (100.0 F)
1925
37.8 C (100.0 F)
1926
37.8 C (100.0 F)
1927
35.6 C (96.1 F)
1928
37.2 C (99.0 F)
1929
36.7 C (98.1 F)
1930
37.8 C (100.0 F)
1931
37.8 C (100.0 F)
1932
36.7 C (98.1 F)
1933
35.0 C (95.0 F)
1934
37.2 C (99.0 F)
1935
35.0 C (95.0 F)
1936
40.6 C (105.1 F)
1937
35.0 C (95.0 F)
1938
36.1 C (97.0 F)
1939
35.6 C (96.1 F)
1940
37.8 C (100.0 F)
1941
36.7 C (98.1 F)
1942
36.1 C (97.0 F)
1943
37.2 C (99.0 F)
1944
35.6 C (96.1 F)
1945
38.3 C (100.9 F)
1946
36.7 C (98.1 F)
1947
37.2 C (99.0 F)
1948
40.6 C (105.1 F)
1949
38.9 C (102.0 F)
1950
36.1 C (97.0 F)
1951
35.6 C (96.1 F)
1952
37.8 C (100.0 F)
1953
40.0 C (104.0 F)
1954
40.0 C (104.0 F)
1955
38.3 C (100.9 F)
1956
35.0 C (95.0 F)
1957
37.8 C (100.0 F)
1958
34.4 C (93.9 F)
1959
37.2 C (99.0 F)
1960
34.4 C (93.9 F)
1961
35.0 C (95.0 F)
1962
35.0 C (95.0 F)
1963
37.2 C (99.0 F)
1964
36.7 C (98.1 F)
1965
35.0 C (95.0 F)
1966
38.9 C (102.0 F)
1967
34.4 C (93.9 F)
1968
36.7 C (98.1 F)
1969
37.8 C (100.0 F)
1970
36.7 C (98.1 F)
1971
35.6 C (96.1 F)
Coldest night (TNn)
The coldest night of the year at Coleman 3 WNW, 1899 to 1971. The record is -23.9 C (-11.0 F) in 1934, marked on the chart; the median year is -14.4 C (6.1 F).
Coldest night (TNn) at Coleman 3 WNW by year
Year
Coldest night (TNn)
1899
-15.6 C (3.9 F)
1900
n/a
1901
n/a
1902
-12.8 C (9.0 F)
1903
-16.1 C (3.0 F)
1904
-18.9 C (-2.0 F)
1905
-18.3 C (-0.9 F)
1906
-13.3 C (8.1 F)
1907
-15.0 C (5.0 F)
1908
-4.4 C (24.1 F)
1909
-13.3 C (8.1 F)
1910
-13.3 C (8.1 F)
1911
-10.6 C (12.9 F)
1912
-21.1 C (-6.0 F)
1913
-11.1 C (12.0 F)
1914
-17.2 C (1.0 F)
1915
-8.9 C (16.0 F)
1916
-11.7 C (10.9 F)
1917
-19.4 C (-2.9 F)
1918
-21.1 C (-6.0 F)
1919
-15.0 C (5.0 F)
1920
-15.6 C (3.9 F)
1921
-12.8 C (9.0 F)
1922
-15.6 C (3.9 F)
1923
-12.2 C (10.0 F)
1924
-14.4 C (6.1 F)
1925
-15.6 C (3.9 F)
1926
-14.4 C (6.1 F)
1927
-14.4 C (6.1 F)
1928
-13.9 C (7.0 F)
1929
-11.1 C (12.0 F)
1930
-13.9 C (7.0 F)
1931
-9.4 C (15.1 F)
1932
-11.7 C (10.9 F)
1933
-15.6 C (3.9 F)
1934
-23.9 C (-11.0 F)
1935
-20.0 C (-4.0 F)
1936
-18.3 C (-0.9 F)
1937
-8.9 C (16.0 F)
1938
-10.6 C (12.9 F)
1939
-10.0 C (14.0 F)
1940
-15.6 C (3.9 F)
1941
-10.0 C (14.0 F)
1942
-19.4 C (-2.9 F)
1943
-15.6 C (3.9 F)
1944
-11.1 C (12.0 F)
1945
-15.0 C (5.0 F)
1946
-13.3 C (8.1 F)
1947
-15.0 C (5.0 F)
1948
-15.6 C (3.9 F)
1949
-8.9 C (16.0 F)
1950
-12.2 C (10.0 F)
1951
-12.2 C (10.0 F)
1952
-10.6 C (12.9 F)
1953
-8.3 C (17.1 F)
1954
-13.9 C (7.0 F)
1955
-15.0 C (5.0 F)
1956
-7.8 C (18.0 F)
1957
-16.7 C (1.9 F)
1958
-15.0 C (5.0 F)
1959
-12.2 C (10.0 F)
1960
-15.0 C (5.0 F)
1961
-16.1 C (3.0 F)
1962
-14.4 C (6.1 F)
1963
-17.2 C (1.0 F)
1964
-12.2 C (10.0 F)
1965
-15.6 C (3.9 F)
1966
-15.0 C (5.0 F)
1967
-14.4 C (6.1 F)
1968
-13.9 C (7.0 F)
1969
-10.6 C (12.9 F)
1970
-15.6 C (3.9 F)
1971
-13.9 C (7.0 F)
Wettest day (Rx1day)
The wettest day of the year at Coleman 3 WNW, 1899 to 1971. The record is 137.9 mm (5.4 in) in 1955, marked on the chart; the median year is 67.3 mm (2.6 in).
Wettest day (Rx1day) at Coleman 3 WNW by year
Year
Wettest day (Rx1day)
1899
92.2 mm (3.6 in)
1900
69.9 mm (2.8 in)
1901
115.3 mm (4.5 in)
1902
52.1 mm (2.1 in)
1903
55.4 mm (2.2 in)
1904
128.5 mm (5.1 in)
1905
50.3 mm (2.0 in)
1906
86.4 mm (3.4 in)
1907
93.7 mm (3.7 in)
1908
84.8 mm (3.3 in)
1909
86.9 mm (3.4 in)
1910
52.3 mm (2.1 in)
1911
67.6 mm (2.7 in)
1912
94.7 mm (3.7 in)
1913
51.6 mm (2.0 in)
1914
43.2 mm (1.7 in)
1915
42.4 mm (1.7 in)
1916
17.8 mm (0.7 in)
1917
73.7 mm (2.9 in)
1918
73.7 mm (2.9 in)
1919
64.8 mm (2.6 in)
1920
66.0 mm (2.6 in)
1921
72.4 mm (2.9 in)
1922
69.9 mm (2.8 in)
1923
69.9 mm (2.8 in)
1924
69.9 mm (2.8 in)
1925
54.4 mm (2.1 in)
1926
50.8 mm (2.0 in)
1927
48.3 mm (1.9 in)
1928
127.0 mm (5.0 in)
1929
73.7 mm (2.9 in)
1930
36.3 mm (1.4 in)
1931
77.5 mm (3.1 in)
1932
52.6 mm (2.1 in)
1933
105.4 mm (4.1 in)
1934
50.8 mm (2.0 in)
1935
88.9 mm (3.5 in)
1936
63.0 mm (2.5 in)
1937
47.0 mm (1.9 in)
1938
58.9 mm (2.3 in)
1939
93.2 mm (3.7 in)
1940
58.4 mm (2.3 in)
1941
57.4 mm (2.3 in)
1942
67.3 mm (2.6 in)
1943
50.8 mm (2.0 in)
1944
48.3 mm (1.9 in)
1945
68.6 mm (2.7 in)
1946
80.3 mm (3.2 in)
1947
57.2 mm (2.3 in)
1948
58.7 mm (2.3 in)
1949
47.8 mm (1.9 in)
1950
66.5 mm (2.6 in)
1951
45.7 mm (1.8 in)
1952
53.6 mm (2.1 in)
1953
72.4 mm (2.9 in)
1954
33.0 mm (1.3 in)
1955
137.9 mm (5.4 in)
1956
82.3 mm (3.2 in)
1957
99.6 mm (3.9 in)
1958
93.5 mm (3.7 in)
1959
85.1 mm (3.4 in)
1960
116.8 mm (4.6 in)
1961
42.4 mm (1.7 in)
1962
56.4 mm (2.2 in)
1963
54.6 mm (2.1 in)
1964
51.6 mm (2.0 in)
1965
62.5 mm (2.5 in)
1966
97.8 mm (3.9 in)
1967
89.4 mm (3.5 in)
1968
71.6 mm (2.8 in)
1969
87.6 mm (3.4 in)
1970
46.5 mm (1.8 in)
1971
133.4 mm (5.3 in)
Wettest five days (Rx5day)
The wettest five days of the year at Coleman 3 WNW, 1899 to 1971. The record is 199.7 mm (7.9 in) in 1955, marked on the chart; the median year is 103.5 mm (4.1 in).
Wettest five days (Rx5day) at Coleman 3 WNW by year
Year
Wettest five days (Rx5day)
1899
104.9 mm (4.1 in)
1900
80.5 mm (3.2 in)
1901
121.4 mm (4.8 in)
1902
62.5 mm (2.5 in)
1903
85.4 mm (3.4 in)
1904
152.9 mm (6.0 in)
1905
77.7 mm (3.1 in)
1906
108.2 mm (4.3 in)
1907
121.9 mm (4.8 in)
1908
89.4 mm (3.5 in)
1909
86.9 mm (3.4 in)
1910
83.6 mm (3.3 in)
1911
183.9 mm (7.2 in)
1912
115.5 mm (4.5 in)
1913
105.7 mm (4.2 in)
1914
64.8 mm (2.6 in)
1915
59.0 mm (2.3 in)
1916
21.9 mm (0.9 in)
1917
94.0 mm (3.7 in)
1918
76.2 mm (3.0 in)
1919
160.0 mm (6.3 in)
1920
139.4 mm (5.5 in)
1921
109.0 mm (4.3 in)
1922
98.5 mm (3.9 in)
1923
69.9 mm (2.8 in)
1924
100.4 mm (4.0 in)
1925
77.3 mm (3.0 in)
1926
114.9 mm (4.5 in)
1927
78.7 mm (3.1 in)
1928
148.6 mm (5.9 in)
1929
138.7 mm (5.5 in)
1930
43.9 mm (1.7 in)
1931
140.2 mm (5.5 in)
1932
104.2 mm (4.1 in)
1933
194.8 mm (7.7 in)
1934
76.9 mm (3.0 in)
1935
181.6 mm (7.1 in)
1936
93.5 mm (3.7 in)
1937
103.5 mm (4.1 in)
1938
118.1 mm (4.6 in)
1939
196.3 mm (7.7 in)
1940
72.2 mm (2.8 in)
1941
71.6 mm (2.8 in)
1942
118.0 mm (4.6 in)
1943
87.6 mm (3.4 in)
1944
84.1 mm (3.3 in)
1945
125.3 mm (4.9 in)
1946
153.5 mm (6.0 in)
1947
100.1 mm (3.9 in)
1948
109.0 mm (4.3 in)
1949
80.5 mm (3.2 in)
1950
77.9 mm (3.1 in)
1951
84.3 mm (3.3 in)
1952
136.4 mm (5.4 in)
1953
91.7 mm (3.6 in)
1954
59.7 mm (2.4 in)
1955
199.7 mm (7.9 in)
1956
105.7 mm (4.2 in)
1957
148.3 mm (5.8 in)
1958
126.8 mm (5.0 in)
1959
169.6 mm (6.7 in)
1960
169.9 mm (6.7 in)
1961
70.1 mm (2.8 in)
1962
105.7 mm (4.2 in)
1963
94.4 mm (3.7 in)
1964
81.8 mm (3.2 in)
1965
64.3 mm (2.5 in)
1966
109.5 mm (4.3 in)
1967
105.1 mm (4.1 in)
1968
91.4 mm (3.6 in)
1969
162.5 mm (6.4 in)
1970
68.4 mm (2.7 in)
1971
178.4 mm (7.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Coleman 3 WNW, 1899 to 1971. The record is 35 days in 1919, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Coleman 3 WNW by year
Year
Longest dry spell (CDD)
1899
11 days
1900
14 days
1901
28 days
1902
20 days
1903
19 days
1904
27 days
1905
33 days
1906
17 days
1907
18 days
1908
21 days
1909
18 days
1910
30 days
1911
17 days
1912
13 days
1913
17 days
1914
18 days
1915
14 days
1916
12 days
1917
28 days
1918
16 days
1919
35 days
1920
27 days
1921
15 days
1922
24 days
1923
25 days
1924
27 days
1925
15 days
1926
15 days
1927
19 days
1928
14 days
1929
17 days
1930
27 days
1931
20 days
1932
18 days
1933
15 days
1934
14 days
1935
18 days
1936
18 days
1937
13 days
1938
13 days
1939
23 days
1940
18 days
1941
24 days
1942
25 days
1943
18 days
1944
19 days
1945
13 days
1946
20 days
1947
13 days
1948
20 days
1949
21 days
1950
12 days
1951
12 days
1952
22 days
1953
18 days
1954
18 days
1955
22 days
1956
12 days
1957
14 days
1958
16 days
1959
17 days
1960
19 days
1961
15 days
1962
19 days
1963
28 days
1964
23 days
1965
17 days
1966
20 days
1967
19 days
1968
25 days
1969
16 days
1970
17 days
1971
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
54 years with a frost
Across 54 years with a frost, the median last spring frost at Coleman 3 WNW falls on 7 April and the median first autumn frost on 6 November, which leaves a median of 214 days between them.
Fitted over all years, the growing season changes by +2.2 days per decade at this station.
Frost dates and growing season at Coleman 3 WNW
Measure
Median, all years
Earliest period
Recent period (1937 to 1970)
Recent against earliest
Fitted trend
Last spring frost
7 April
n/a
4 April
n/a
-1.5 days per decade
First autumn frost
6 November
n/a
10 November
n/a
+0.7 days per decade
Growing days
214 days
n/a
220 days
n/a
+2.2 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
63 years, 1900 to 1970
A day with at least 67.7 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 148.3 mm (5.8 in) of rain is expected about once in 100 years.
Rainfall return levels at Coleman 3 WNW: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
67.7 mm (2.7 in)
5 years
88.5 mm (3.5 in)
10 years
102.6 mm (4.0 in)
25 years
120.8 mm (4.8 in)
50 years
134.5 mm (5.3 in)
100 years
148.3 mm (5.8 in)
Longer than the 63 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, 63 years of values from 1900 to 1970.
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: 137.9 mm (5.4 in) in 1955; 128.5 mm (5.1 in) in 1904; 127.0 mm (5.0 in) in 1928.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of Coleman 3 WNW, at 1931 and 1946. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1931 ran 0.2 C (0.4 F) lower than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1946 ran 0.4 C (0.7 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Coleman 3 WNW, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1931
-0.2
-0.4
likely
5
1946
+0.4
+0.7
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 Coleman 3 WNW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Coleman 3 WNW 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.