Tomahawk Spirit Rsvr Weather Records (USC00478528)
Record envelope, standing records and threshold days for Tomahawk Spirit Rsvr (USC00478528), Wisconsin, United States, with 76 years of record.
Key Facts for Tomahawk Spirit Rsvr
Tomahawk Spirit Rsvr (USC00478528) is a weather station in Wisconsin, United States at 45.43 latitude and -89.75 longitude, 439 m (1,440 ft) above sea level.
The station reports from 1902 to 1977, 76 years of record.
1,464 records set at Tomahawk Spirit Rsvr still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Tomahawk Spirit Rsvr set a daily record high maximum temperature of 30.0 C (86.0 F) on 15 May 1977.
About the Station
Location: Wisconsin, United States, 45.43 latitude, -89.75 longitude.
Elevation: 439 m (1,440 ft).
Period of record: 1902 to 1977, 76 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 Tomahawk Spirit Rsvr. 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 Tomahawk Spirit Rsvr, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
13.3 C (55.9 F)
-42.8 C (-45.0 F)
n/a
n/a
Feb
13.3 C (55.9 F)
-41.1 C (-42.0 F)
n/a
n/a
Mar
23.3 C (73.9 F)
-41.1 C (-42.0 F)
n/a
n/a
Apr
31.1 C (88.0 F)
-18.9 C (-2.0 F)
n/a
n/a
May
40.0 C (104.0 F)
-11.7 C (10.9 F)
n/a
n/a
Jun
36.7 C (98.1 F)
-1.7 C (28.9 F)
n/a
n/a
Jul
40.0 C (104.0 F)
1.1 C (34.0 F)
n/a
n/a
Aug
36.1 C (97.0 F)
-2.2 C (28.0 F)
n/a
n/a
Sep
33.9 C (93.0 F)
-7.8 C (18.0 F)
n/a
n/a
Oct
28.9 C (84.0 F)
-12.8 C (9.0 F)
n/a
n/a
Nov
23.9 C (75.0 F)
-28.3 C (-18.9 F)
n/a
n/a
Dec
16.1 C (61.0 F)
-36.1 C (-33.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Tomahawk Spirit Rsvr still stand. 1913 holds the most, with 51.
Standing records at Tomahawk Spirit Rsvr by the year they were set
Year set
Standing records
1902
7
1903
24
1904
10
1905
22
1913
51
1914
36
1915
33
1916
37
1917
39
1918
33
1919
35
1920
35
1934
35
1935
24
1936
49
1937
28
1938
20
1939
33
1940
26
1941
15
1942
29
1943
26
1944
26
1945
33
1946
21
1947
38
1948
23
1949
15
1950
45
1951
36
1952
21
1953
26
1954
23
1955
21
1956
22
1957
10
1958
15
1959
18
1960
21
1961
14
1962
24
1963
27
1964
35
1965
23
1966
18
1967
16
1968
28
1969
11
1970
21
1971
22
1972
22
1973
27
1974
24
1975
27
1976
43
1977
21
All-Time Record Progression
11 new records
11 all-time records were set at Tomahawk Spirit Rsvr between 23 January 1963 and 31 August 1973. Each dot is a new record.
When Tomahawk Spirit Rsvr set new all-time records
Date
Kind
Detail
1963-01-23
Record low maximum temperature
Record low maximum temperature -25.0 C (-13.0 F)
1967-01-18
Record low minimum temperature
Record low minimum temperature -42.8 C (-45.0 F)
1969-01-16
Record snow depth
Record snow depth 88.9 cm (35.0 in)
1969-01-18
Record snow depth
Record snow depth 91.4 cm (36.0 in)
1971-02-05
Record snow depth
Record snow depth 94.0 cm (37.0 in)
1971-02-06
Record snow depth
Record snow depth 96.5 cm (38.0 in)
1972-01-15
Record low maximum temperature
Record low maximum temperature -25.6 C (-14.1 F)
1972-03-04
Record snow depth
Record snow depth 101.6 cm (40.0 in)
1972-03-05
Record snow depth
Record snow depth 104.1 cm (41.0 in)
1972-03-07
Record snow depth
Record snow depth 111.8 cm (44.0 in)
1973-08-31
Record daily precipitation
Record daily precipitation 100.3 mm (3.9 in)
Wettest Day of Each Month
Aug: 100.3 mm (3.9 in)
The wettest day on record for each calendar month at Tomahawk Spirit Rsvr. The most was 100.3 mm (3.9 in) on 31 August 1973.
Record daily precipitation for each month at Tomahawk Spirit Rsvr
Month
Record daily precipitation (mm)
Date
Jan
35.6 mm (1.4 in)
25 January 1967
Feb
43.2 mm (1.7 in)
21 February 1937
Mar
69.9 mm (2.8 in)
20 March 1921
Apr
56.4 mm (2.2 in)
17 April 1939
May
56.6 mm (2.2 in)
13 May 1962
Jun
68.6 mm (2.7 in)
24 June 1946
Jul
85.1 mm (3.4 in)
4 July 1949
Aug
100.3 mm (3.9 in)
31 August 1973
Sep
80.8 mm (3.2 in)
18 September 1942
Oct
87.6 mm (3.4 in)
9 October 1904
Nov
64.8 mm (2.6 in)
10 November 1975
Dec
41.9 mm (1.6 in)
16 December 1940
Period of Record Coverage
1902 to 1977
Complete yearUnder 90 percent of days
56 years of record at Tomahawk Spirit Rsvr, 1902 to 1977. 13 years have data for under 90 percent of days and are left out of rankings: 1902, 1903, 1904, 1905, 1913, 1914, 1915, 1916 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 42 complete years at Tomahawk Spirit Rsvr, 1914 to 1976. Blue stripes are years cooler than the station's own mean of 5.2 C (41.3 F); red stripes are warmer. The coolest year was 1976, at 3.0 C (37.4 F), and the warmest was 1939, at 6.5 C (43.7 F). The strongest colour marks a difference of 2.2 C (4.0 F).
Annual mean temperature at Tomahawk Spirit Rsvr as warming stripes, 1914 to 1976
Year
Annual mean temperature
Difference from the station mean
1914
6.0 C
+0.81 C
1916
5.0 C
-0.24 C
1917
3.6 C
-1.57 C
1918
5.9 C
+0.68 C
1936
5.3 C
+0.07 C
1937
4.4 C
-0.83 C
1938
6.4 C
+1.22 C
1939
6.5 C
+1.32 C
1940
5.4 C
+0.17 C
1943
4.4 C
-0.78 C
1944
6.2 C
+1.02 C
1945
4.3 C
-0.90 C
1946
5.8 C
+0.62 C
1947
5.1 C
-0.06 C
1948
5.2 C
-0.02 C
1950
3.3 C
-1.92 C
1951
4.3 C
-0.93 C
1952
5.8 C
+0.64 C
1953
6.4 C
+1.21 C
1954
5.8 C
+0.62 C
1955
5.6 C
+0.41 C
1956
5.1 C
-0.10 C
1957
5.1 C
-0.09 C
1958
5.2 C
-0.01 C
1959
5.1 C
-0.10 C
1960
5.3 C
+0.11 C
1961
6.1 C
+0.90 C
1962
5.4 C
+0.18 C
1963
5.6 C
+0.39 C
1964
6.1 C
+0.95 C
1965
5.1 C
-0.12 C
1966
5.1 C
-0.05 C
1967
4.6 C
-0.57 C
1968
6.0 C
+0.81 C
1969
5.4 C
+0.20 C
1970
5.5 C
+0.31 C
1971
5.1 C
-0.05 C
1972
4.1 C
-1.09 C
1973
6.2 C
+0.98 C
1974
3.9 C
-1.25 C
1975
4.5 C
-0.68 C
1976
3.0 C
-2.18 C
The fitted trend in annual mean temperature here over 1914 to 1976 is -0.1 C (-0.2 to 0.1) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.4 to 0.2) per decade. The slope is a straight line fitted to 42 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Tomahawk Spirit Rsvr
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.1 C (-0.2 to 0.1) per decade
-0.1 F (-0.4 to 0.2) per decade
1914 to 1976
42
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.3 to 0.1) per decade
-0.2 F (-0.5 to 0.1) per decade
1914 to 1976
42
Not clearly different from zero
Mean daily minimum
-0.03 C (-0.21 to 0.15) per decade
-0.1 F (-0.4 to 0.3) per decade
1914 to 1976
42
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
1902 to 1977
Yearly extremes at Tomahawk Spirit Rsvr: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.0 C (104.0 F)
1934
32.8 C (91.0 F)
56
Coldest night (TNn)
-42.8 C (-45.0 F)
1967
-34.1 C (-29.5 F)
56
Wettest day (Rx1day)
100.3 mm (3.9 in)
1973
49.3 mm (1.9 in)
69
Wettest five days (Rx5day)
182.7 mm (7.2 in)
1942
81.8 mm (3.2 in)
69
Longest dry spell (CDD)
48 days
1904
20 days
69
Hottest day (TXx)
The hottest day of the year at Tomahawk Spirit Rsvr, 1902 to 1977. The record is 40.0 C (104.0 F) in 1934, marked on the chart; the median year is 32.8 C (91.0 F).
Hottest day (TXx) at Tomahawk Spirit Rsvr by year
Year
Hottest day (TXx)
1902
25.0 C (77.0 F)
1903
31.7 C (89.1 F)
1904
33.3 C (91.9 F)
1905
35.6 C (96.1 F)
1913
34.4 C (93.9 F)
1914
35.0 C (95.0 F)
1915
32.2 C (90.0 F)
1916
36.7 C (98.1 F)
1917
34.4 C (93.9 F)
1918
35.0 C (95.0 F)
1919
32.8 C (91.0 F)
1920
32.2 C (90.0 F)
1921
n/a
1922
n/a
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
n/a
1933
n/a
1934
40.0 C (104.0 F)
1935
35.6 C (96.1 F)
1936
40.0 C (104.0 F)
1937
32.2 C (90.0 F)
1938
35.0 C (95.0 F)
1939
36.7 C (98.1 F)
1940
35.6 C (96.1 F)
1941
32.8 C (91.0 F)
1942
32.2 C (90.0 F)
1943
31.7 C (89.1 F)
1944
32.2 C (90.0 F)
1945
30.6 C (87.1 F)
1946
29.4 C (84.9 F)
1947
36.1 C (97.0 F)
1948
36.1 C (97.0 F)
1949
31.7 C (89.1 F)
1950
30.0 C (86.0 F)
1951
28.9 C (84.0 F)
1952
30.6 C (87.1 F)
1953
32.2 C (90.0 F)
1954
30.6 C (87.1 F)
1955
34.4 C (93.9 F)
1956
31.7 C (89.1 F)
1957
32.8 C (91.0 F)
1958
30.6 C (87.1 F)
1959
32.8 C (91.0 F)
1960
31.7 C (89.1 F)
1961
32.8 C (91.0 F)
1962
30.6 C (87.1 F)
1963
35.6 C (96.1 F)
1964
35.0 C (95.0 F)
1965
32.8 C (91.0 F)
1966
35.0 C (95.0 F)
1967
30.6 C (87.1 F)
1968
33.3 C (91.9 F)
1969
32.8 C (91.0 F)
1970
35.6 C (96.1 F)
1971
34.4 C (93.9 F)
1972
32.2 C (90.0 F)
1973
32.8 C (91.0 F)
1974
35.6 C (96.1 F)
1975
33.9 C (93.0 F)
1976
31.7 C (89.1 F)
1977
31.7 C (89.1 F)
Coldest night (TNn)
The coldest night of the year at Tomahawk Spirit Rsvr, 1902 to 1977. The record is -42.8 C (-45.0 F) in 1967, marked on the chart; the median year is -34.1 C (-29.5 F).
Coldest night (TNn) at Tomahawk Spirit Rsvr by year
Year
Coldest night (TNn)
1902
-26.7 C (-16.1 F)
1903
-34.4 C (-29.9 F)
1904
-28.3 C (-18.9 F)
1905
-12.8 C (9.0 F)
1913
-33.9 C (-29.0 F)
1914
-33.9 C (-29.0 F)
1915
-41.7 C (-43.1 F)
1916
-38.9 C (-38.0 F)
1917
-40.0 C (-40.0 F)
1918
-41.1 C (-42.0 F)
1919
-36.1 C (-33.0 F)
1920
-39.4 C (-38.9 F)
1921
n/a
1922
n/a
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
n/a
1933
n/a
1934
-28.9 C (-20.0 F)
1935
-38.3 C (-36.9 F)
1936
-40.6 C (-41.1 F)
1937
-33.9 C (-29.0 F)
1938
-36.7 C (-34.1 F)
1939
-33.3 C (-27.9 F)
1940
-32.2 C (-26.0 F)
1941
-27.8 C (-18.0 F)
1942
-36.1 C (-33.0 F)
1943
-33.9 C (-29.0 F)
1944
-29.4 C (-20.9 F)
1945
-32.8 C (-27.0 F)
1946
-33.9 C (-29.0 F)
1947
-36.7 C (-34.1 F)
1948
-38.9 C (-38.0 F)
1949
-34.4 C (-29.9 F)
1950
-40.0 C (-40.0 F)
1951
-40.6 C (-41.1 F)
1952
-33.3 C (-27.9 F)
1953
-30.0 C (-22.0 F)
1954
-33.9 C (-29.0 F)
1955
-32.2 C (-26.0 F)
1956
-32.2 C (-26.0 F)
1957
-30.6 C (-23.1 F)
1958
-33.3 C (-27.9 F)
1959
-34.4 C (-29.9 F)
1960
-30.0 C (-22.0 F)
1961
-30.0 C (-22.0 F)
1962
-41.1 C (-42.0 F)
1963
-39.4 C (-38.9 F)
1964
-31.1 C (-24.0 F)
1965
-33.9 C (-29.0 F)
1966
-35.0 C (-31.0 F)
1967
-42.8 C (-45.0 F)
1968
-33.9 C (-29.0 F)
1969
-30.0 C (-22.0 F)
1970
-36.1 C (-33.0 F)
1971
-38.9 C (-38.0 F)
1972
-40.0 C (-40.0 F)
1973
-35.0 C (-31.0 F)
1974
-37.2 C (-35.0 F)
1975
-31.1 C (-24.0 F)
1976
-34.4 C (-29.9 F)
1977
-38.9 C (-38.0 F)
Wettest day (Rx1day)
The wettest day of the year at Tomahawk Spirit Rsvr, 1902 to 1977. The record is 100.3 mm (3.9 in) in 1973, marked on the chart; the median year is 49.3 mm (1.9 in).
Wettest day (Rx1day) at Tomahawk Spirit Rsvr by year
Year
Wettest day (Rx1day)
1902
38.1 mm (1.5 in)
1903
45.7 mm (1.8 in)
1904
87.6 mm (3.4 in)
1905
45.7 mm (1.8 in)
1913
58.4 mm (2.3 in)
1914
46.7 mm (1.8 in)
1915
42.9 mm (1.7 in)
1916
47.0 mm (1.9 in)
1917
29.5 mm (1.2 in)
1918
49.3 mm (1.9 in)
1919
43.7 mm (1.7 in)
1920
38.1 mm (1.5 in)
1921
69.9 mm (2.8 in)
1922
54.6 mm (2.1 in)
1923
63.5 mm (2.5 in)
1924
52.3 mm (2.1 in)
1925
53.8 mm (2.1 in)
1926
54.4 mm (2.1 in)
1927
58.4 mm (2.3 in)
1928
54.1 mm (2.1 in)
1929
60.5 mm (2.4 in)
1930
65.3 mm (2.6 in)
1931
42.4 mm (1.7 in)
1932
29.2 mm (1.1 in)
1933
35.6 mm (1.4 in)
1934
58.9 mm (2.3 in)
1935
68.6 mm (2.7 in)
1936
91.4 mm (3.6 in)
1937
43.2 mm (1.7 in)
1938
41.9 mm (1.6 in)
1939
56.4 mm (2.2 in)
1940
63.5 mm (2.5 in)
1941
67.3 mm (2.6 in)
1942
80.8 mm (3.2 in)
1943
39.4 mm (1.6 in)
1944
31.8 mm (1.3 in)
1945
45.0 mm (1.8 in)
1946
68.6 mm (2.7 in)
1947
27.9 mm (1.1 in)
1948
47.5 mm (1.9 in)
1949
85.1 mm (3.4 in)
1950
29.0 mm (1.1 in)
1951
42.2 mm (1.7 in)
1952
66.0 mm (2.6 in)
1953
47.5 mm (1.9 in)
1954
45.7 mm (1.8 in)
1955
43.7 mm (1.7 in)
1956
44.5 mm (1.8 in)
1957
38.1 mm (1.5 in)
1958
72.4 mm (2.9 in)
1959
78.7 mm (3.1 in)
1960
46.7 mm (1.8 in)
1961
39.4 mm (1.6 in)
1962
57.9 mm (2.3 in)
1963
35.8 mm (1.4 in)
1964
55.9 mm (2.2 in)
1965
40.4 mm (1.6 in)
1966
68.8 mm (2.7 in)
1967
50.3 mm (2.0 in)
1968
58.9 mm (2.3 in)
1969
36.3 mm (1.4 in)
1970
45.2 mm (1.8 in)
1971
75.2 mm (3.0 in)
1972
58.7 mm (2.3 in)
1973
100.3 mm (3.9 in)
1974
49.5 mm (1.9 in)
1975
70.6 mm (2.8 in)
1976
29.7 mm (1.2 in)
1977
20.3 mm (0.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Tomahawk Spirit Rsvr, 1902 to 1977. The record is 182.7 mm (7.2 in) in 1942, marked on the chart; the median year is 81.8 mm (3.2 in).
Wettest five days (Rx5day) at Tomahawk Spirit Rsvr by year
Year
Wettest five days (Rx5day)
1902
63.5 mm (2.5 in)
1903
104.1 mm (4.1 in)
1904
101.6 mm (4.0 in)
1905
85.1 mm (3.4 in)
1913
76.2 mm (3.0 in)
1914
86.7 mm (3.4 in)
1915
102.9 mm (4.1 in)
1916
61.7 mm (2.4 in)
1917
53.7 mm (2.1 in)
1918
114.0 mm (4.5 in)
1919
63.3 mm (2.5 in)
1920
74.4 mm (2.9 in)
1921
72.7 mm (2.9 in)
1922
88.6 mm (3.5 in)
1923
122.7 mm (4.8 in)
1924
91.4 mm (3.6 in)
1925
78.6 mm (3.1 in)
1926
121.5 mm (4.8 in)
1927
83.1 mm (3.3 in)
1928
131.3 mm (5.2 in)
1929
85.1 mm (3.4 in)
1930
75.7 mm (3.0 in)
1931
86.6 mm (3.4 in)
1932
45.7 mm (1.8 in)
1933
42.5 mm (1.7 in)
1934
104.4 mm (4.1 in)
1935
75.2 mm (3.0 in)
1936
123.7 mm (4.9 in)
1937
71.2 mm (2.8 in)
1938
65.3 mm (2.6 in)
1939
81.8 mm (3.2 in)
1940
105.7 mm (4.2 in)
1941
84.1 mm (3.3 in)
1942
182.7 mm (7.2 in)
1943
102.9 mm (4.1 in)
1944
45.5 mm (1.8 in)
1945
65.8 mm (2.6 in)
1946
88.1 mm (3.5 in)
1947
68.4 mm (2.7 in)
1948
54.6 mm (2.1 in)
1949
124.5 mm (4.9 in)
1950
40.6 mm (1.6 in)
1951
60.0 mm (2.4 in)
1952
98.9 mm (3.9 in)
1953
91.5 mm (3.6 in)
1954
69.3 mm (2.7 in)
1955
79.5 mm (3.1 in)
1956
58.2 mm (2.3 in)
1957
62.8 mm (2.5 in)
1958
103.6 mm (4.1 in)
1959
84.3 mm (3.3 in)
1960
65.3 mm (2.6 in)
1961
54.7 mm (2.2 in)
1962
137.6 mm (5.4 in)
1963
55.1 mm (2.2 in)
1964
64.8 mm (2.6 in)
1965
53.6 mm (2.1 in)
1966
72.9 mm (2.9 in)
1967
72.6 mm (2.9 in)
1968
87.6 mm (3.4 in)
1969
88.7 mm (3.5 in)
1970
82.8 mm (3.3 in)
1971
76.2 mm (3.0 in)
1972
103.1 mm (4.1 in)
1973
147.1 mm (5.8 in)
1974
98.6 mm (3.9 in)
1975
96.5 mm (3.8 in)
1976
38.6 mm (1.5 in)
1977
37.6 mm (1.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Tomahawk Spirit Rsvr, 1902 to 1977. The record is 48 days in 1904, marked on the chart; the median year is 20 days.
Longest dry spell (CDD) at Tomahawk Spirit Rsvr by year
Year
Longest dry spell (CDD)
1902
15 days
1903
25 days
1904
48 days
1905
17 days
1913
31 days
1914
27 days
1915
20 days
1916
16 days
1917
25 days
1918
20 days
1919
15 days
1920
21 days
1921
23 days
1922
13 days
1923
26 days
1924
22 days
1925
16 days
1926
11 days
1927
15 days
1928
21 days
1929
11 days
1930
28 days
1931
19 days
1932
21 days
1933
19 days
1934
14 days
1935
14 days
1936
24 days
1937
23 days
1938
16 days
1939
20 days
1940
13 days
1941
16 days
1942
20 days
1943
41 days
1944
27 days
1945
15 days
1946
15 days
1947
16 days
1948
18 days
1949
22 days
1950
15 days
1951
17 days
1952
40 days
1953
44 days
1954
17 days
1955
16 days
1956
17 days
1957
29 days
1958
29 days
1959
21 days
1960
26 days
1961
31 days
1962
20 days
1963
24 days
1964
27 days
1965
18 days
1966
20 days
1967
25 days
1968
27 days
1969
24 days
1970
17 days
1971
19 days
1972
17 days
1973
15 days
1974
16 days
1975
20 days
1976
21 days
1977
27 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
42 years with a frost
Across 42 years with a frost, the median last spring frost at Tomahawk Spirit Rsvr falls on 23 May and the median first autumn frost on 20 September, which leaves a median of 117 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 Tomahawk Spirit Rsvr
Measure
Median, all years
Earliest period
Recent period (1946 to 1976)
Recent against earliest
Fitted trend
Last spring frost
23 May
n/a
25 May
n/a
+0.2 days per decade
First autumn frost
20 September
n/a
21 September
n/a
-0.1 days per decade
Growing days
117 days
n/a
115 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
47 years, 1915 to 1976
A day with at least 51.1 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 105.6 mm (4.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Tomahawk Spirit Rsvr: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
51.1 mm (2.0 in)
5 years
66.8 mm (2.6 in)
10 years
76.7 mm (3.0 in)
25 years
88.7 mm (3.5 in)
50 years
97.3 mm (3.8 in)
Longer than the 47 years of record
100 years
105.6 mm (4.2 in)
Longer than the 47 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, 47 years of values from 1915 to 1976.
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: 100.3 mm (3.9 in) in 1973; 91.4 mm (3.6 in) in 1936; 85.1 mm (3.4 in) in 1949.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Tomahawk Spirit Rsvr standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Tomahawk Spirit Rsvr 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.