Record envelope, standing records and threshold days for Marietta Wtr Wks (USC00334929), Ohio, United States, with 71 years of record.
Key Facts for Marietta Wtr Wks
Marietta Wtr Wks (USC00334929) is a weather station in Ohio, United States at 39.43 latitude and -81.47 longitude, 253 m (830 ft) above sea level.
The station reports from 1893 to 1963, 71 years of record.
1,464 records set at Marietta Wtr Wks still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Marietta Wtr Wks tied a daily record low minimum temperature of -23.3 C (-9.9 F) on 29 January 1963.
About the Station
Location: Ohio, United States, 39.43 latitude, -81.47 longitude.
Elevation: 253 m (830 ft).
Period of record: 1893 to 1963, 71 years.
Eligible elements: tmax, tmin, prcp.
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 Marietta Wtr Wks. 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 Marietta Wtr Wks, 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)
-27.2 C (-17.0 F)
n/a
n/a
Feb
25.0 C (77.0 F)
-30.0 C (-22.0 F)
n/a
n/a
Mar
31.7 C (89.1 F)
-21.1 C (-6.0 F)
n/a
n/a
Apr
35.6 C (96.1 F)
-11.7 C (10.9 F)
n/a
n/a
May
37.2 C (99.0 F)
-4.4 C (24.1 F)
n/a
n/a
Jun
37.2 C (99.0 F)
1.1 C (34.0 F)
n/a
n/a
Jul
40.6 C (105.1 F)
6.7 C (44.1 F)
n/a
n/a
Aug
41.1 C (106.0 F)
5.6 C (42.1 F)
n/a
n/a
Sep
40.0 C (104.0 F)
-1.1 C (30.0 F)
n/a
n/a
Oct
33.9 C (93.0 F)
-8.3 C (17.1 F)
n/a
n/a
Nov
30.0 C (86.0 F)
-17.2 C (1.0 F)
n/a
n/a
Dec
22.2 C (72.0 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 Marietta Wtr Wks still stand. 1930 holds the most, with 47.
Standing records at Marietta Wtr Wks by the year they were set
Year set
Standing records
1893
7
1894
24
1895
39
1896
31
1897
23
1898
27
1899
36
1900
26
1901
30
1902
28
1903
31
1904
10
1905
14
1906
21
1907
21
1908
11
1909
15
1910
15
1911
30
1912
11
1913
23
1914
40
1915
16
1916
23
1917
28
1918
30
1919
23
1920
20
1921
14
1922
11
1923
21
1924
13
1925
28
1926
8
1927
28
1928
19
1929
29
1930
47
1931
29
1932
24
1933
26
1934
33
1940
27
1941
25
1942
22
1943
25
1944
10
1945
24
1946
17
1947
27
1948
27
1949
16
1951
14
1952
18
1953
26
1954
21
1955
21
1956
35
1957
17
1958
12
1959
21
1960
21
1961
22
1962
28
1963
5
All-Time Record Progression
1 new records
1 all-time records were set at Marietta Wtr Wks between 9 July 1957 and 9 July 1957. Each dot is a new record.
When Marietta Wtr Wks set new all-time records
Date
Kind
Detail
1957-07-09
Record high minimum temperature
Record high minimum temperature 25.6 C (78.1 F)
Wettest Day of Each Month
Apr: 93.5 mm (3.7 in)
The wettest day on record for each calendar month at Marietta Wtr Wks. The most was 93.5 mm (3.7 in) on 14 April 1922.
Record daily precipitation for each month at Marietta Wtr Wks
Month
Record daily precipitation (mm)
Date
Jan
41.7 mm (1.6 in)
6 January 1895
Feb
48.3 mm (1.9 in)
26 February 1945
Mar
64.8 mm (2.6 in)
13 March 1918
Apr
93.5 mm (3.7 in)
14 April 1922
May
54.6 mm (2.1 in)
11 May 1905
Jun
71.1 mm (2.8 in)
4 June 1941
Jul
79.2 mm (3.1 in)
30 July 1941
Aug
72.4 mm (2.9 in)
15 August 1909
Sep
62.2 mm (2.4 in)
20 September 1933
Oct
71.1 mm (2.8 in)
14 October 1893
Nov
63.5 mm (2.5 in)
26 November 1919
Dec
71.1 mm (2.8 in)
15 December 1948
Period of Record Coverage
1893 to 1963
Complete yearUnder 90 percent of days
65 years of record at Marietta Wtr Wks, 1893 to 1963. 11 years have data for under 90 percent of days and are left out of rankings: 1893, 1895, 1896, 1944, 1946, 1947, 1948, 1949 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 52 complete years at Marietta Wtr Wks, 1894 to 1962. Blue stripes are years cooler than the station's own mean of 12.5 C (54.4 F); red stripes are warmer. The coolest year was 1917, at 10.5 C (50.9 F), and the warmest was 1921, at 14.3 C (57.7 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Marietta Wtr Wks as warming stripes, 1894 to 1962
Year
Annual mean temperature
Difference from the station mean
1894
12.8 C
+0.39 C
1897
12.4 C
-0.05 C
1898
12.8 C
+0.30 C
1899
12.6 C
+0.15 C
1900
13.2 C
+0.74 C
1901
11.8 C
-0.64 C
1902
12.3 C
-0.16 C
1903
12.2 C
-0.27 C
1904
11.3 C
-1.19 C
1905
11.6 C
-0.90 C
1906
12.9 C
+0.46 C
1907
12.1 C
-0.39 C
1908
13.1 C
+0.69 C
1909
12.9 C
+0.41 C
1910
12.2 C
-0.21 C
1911
13.5 C
+1.05 C
1912
12.0 C
-0.48 C
1913
13.0 C
+0.57 C
1914
12.0 C
-0.47 C
1915
12.0 C
-0.44 C
1916
12.0 C
-0.42 C
1917
10.5 C
-1.93 C
1918
12.3 C
-0.15 C
1919
12.6 C
+0.15 C
1920
11.2 C
-1.26 C
1921
14.3 C
+1.80 C
1922
13.3 C
+0.80 C
1923
12.5 C
+0.03 C
1924
11.7 C
-0.74 C
1925
12.7 C
+0.22 C
1926
11.6 C
-0.82 C
1927
12.8 C
+0.32 C
1928
12.2 C
-0.21 C
1930
12.7 C
+0.20 C
1931
13.7 C
+1.25 C
1932
13.1 C
+0.60 C
1933
13.4 C
+0.91 C
1934
12.7 C
+0.27 C
1940
11.8 C
-0.64 C
1941
13.2 C
+0.78 C
1942
12.8 C
+0.31 C
1943
12.0 C
-0.48 C
1945
11.9 C
-0.59 C
1952
13.4 C
+0.93 C
1955
13.1 C
+0.64 C
1956
12.7 C
+0.20 C
1957
12.7 C
+0.22 C
1958
11.6 C
-0.88 C
1959
13.1 C
+0.65 C
1960
11.6 C
-0.84 C
1961
12.2 C
-0.26 C
1962
11.9 C
-0.57 C
The fitted trend in annual mean temperature here over 1894 to 1962 is 0.01 C (-0.09 to 0.11) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.02 F (-0.16 to 0.20) per decade. The slope is a straight line fitted to 52 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Marietta Wtr Wks
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.01 C (-0.09 to 0.11) per decade
0.02 F (-0.16 to 0.20) per decade
1894 to 1962
52
Not clearly different from zero
Mean daily maximum
0.16 C (0.03 to 0.28) per decade
0.3 F (0.1 to 0.5) per decade
1894 to 1962
52
Rise
Mean daily minimum
-0.14 C (-0.25 to -0.02) per decade
-0.25 F (-0.46 to -0.03) per decade
1894 to 1962
52
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
1893 to 1963
Yearly extremes at Marietta Wtr Wks: 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)
65
Coldest night (TNn)
-30.0 C (-22.0 F)
1899
-19.4 C (-2.9 F)
65
Wettest day (Rx1day)
93.5 mm (3.7 in)
1922
50.8 mm (2.0 in)
65
Wettest five days (Rx5day)
182.5 mm (7.2 in)
1941
77.6 mm (3.1 in)
65
Longest dry spell (CDD)
32 days
1901
16 days
65
Hottest day (TXx)
The hottest day of the year at Marietta Wtr Wks, 1893 to 1963. 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 Marietta Wtr Wks by year
Year
Hottest day (TXx)
1893
34.4 C (93.9 F)
1894
36.7 C (98.1 F)
1895
36.7 C (98.1 F)
1896
35.6 C (96.1 F)
1897
35.0 C (95.0 F)
1898
34.4 C (93.9 F)
1899
33.3 C (91.9 F)
1900
34.4 C (93.9 F)
1901
36.7 C (98.1 F)
1902
33.9 C (93.0 F)
1903
33.9 C (93.0 F)
1904
32.8 C (91.0 F)
1905
32.2 C (90.0 F)
1906
32.8 C (91.0 F)
1907
32.8 C (91.0 F)
1908
35.6 C (96.1 F)
1909
35.0 C (95.0 F)
1910
36.1 C (97.0 F)
1911
40.0 C (104.0 F)
1912
35.0 C (95.0 F)
1913
37.2 C (99.0 F)
1914
38.9 C (102.0 F)
1915
35.6 C (96.1 F)
1916
37.2 C (99.0 F)
1917
36.1 C (97.0 F)
1918
41.1 C (106.0 F)
1919
38.3 C (100.9 F)
1920
34.4 C (93.9 F)
1921
36.7 C (98.1 F)
1922
35.6 C (96.1 F)
1923
36.7 C (98.1 F)
1924
36.1 C (97.0 F)
1925
37.2 C (99.0 F)
1926
36.1 C (97.0 F)
1927
35.6 C (96.1 F)
1928
33.9 C (93.0 F)
1929
35.0 C (95.0 F)
1930
40.6 C (105.1 F)
1931
38.3 C (100.9 F)
1932
37.8 C (100.0 F)
1933
37.2 C (99.0 F)
1934
40.6 C (105.1 F)
1940
37.2 C (99.0 F)
1941
37.8 C (100.0 F)
1942
35.6 C (96.1 F)
1943
34.4 C (93.9 F)
1944
36.7 C (98.1 F)
1945
33.9 C (93.0 F)
1946
34.4 C (93.9 F)
1947
33.3 C (91.9 F)
1948
33.9 C (93.0 F)
1949
36.1 C (97.0 F)
1951
32.8 C (91.0 F)
1952
36.1 C (97.0 F)
1953
40.0 C (104.0 F)
1954
37.8 C (100.0 F)
1955
37.8 C (100.0 F)
1956
35.0 C (95.0 F)
1957
36.7 C (98.1 F)
1958
32.2 C (90.0 F)
1959
37.2 C (99.0 F)
1960
33.9 C (93.0 F)
1961
33.9 C (93.0 F)
1962
36.7 C (98.1 F)
1963
17.2 C (63.0 F)
Coldest night (TNn)
The coldest night of the year at Marietta Wtr Wks, 1893 to 1963. The record is -30.0 C (-22.0 F) in 1899, marked on the chart; the median year is -19.4 C (-2.9 F).
Coldest night (TNn) at Marietta Wtr Wks by year
Year
Coldest night (TNn)
1893
-7.8 C (18.0 F)
1894
-20.0 C (-4.0 F)
1895
-20.6 C (-5.1 F)
1896
-18.9 C (-2.0 F)
1897
-22.2 C (-8.0 F)
1898
-17.8 C (0.0 F)
1899
-30.0 C (-22.0 F)
1900
-17.8 C (0.0 F)
1901
-19.4 C (-2.9 F)
1902
-15.6 C (3.9 F)
1903
-17.2 C (1.0 F)
1904
-23.3 C (-9.9 F)
1905
-21.1 C (-6.0 F)
1906
-17.8 C (0.0 F)
1907
-20.6 C (-5.1 F)
1908
-12.8 C (9.0 F)
1909
-16.7 C (1.9 F)
1910
-20.0 C (-4.0 F)
1911
-17.2 C (1.0 F)
1912
-23.3 C (-9.9 F)
1913
-15.6 C (3.9 F)
1914
-23.9 C (-11.0 F)
1915
-18.3 C (-0.9 F)
1916
-23.3 C (-9.9 F)
1917
-22.8 C (-9.0 F)
1918
-25.0 C (-13.0 F)
1919
-20.6 C (-5.1 F)
1920
-18.9 C (-2.0 F)
1921
-12.2 C (10.0 F)
1922
-14.4 C (6.1 F)
1923
-18.3 C (-0.9 F)
1924
-18.9 C (-2.0 F)
1925
-21.1 C (-6.0 F)
1926
-23.3 C (-9.9 F)
1927
-17.8 C (0.0 F)
1928
-13.9 C (7.0 F)
1929
-21.7 C (-7.1 F)
1930
-20.6 C (-5.1 F)
1931
-10.6 C (12.9 F)
1932
-22.8 C (-9.0 F)
1933
-19.4 C (-2.9 F)
1934
-25.6 C (-14.1 F)
1940
-24.4 C (-11.9 F)
1941
-12.8 C (9.0 F)
1942
-22.2 C (-8.0 F)
1943
-21.1 C (-6.0 F)
1944
-17.2 C (1.0 F)
1945
-17.2 C (1.0 F)
1946
-12.2 C (10.0 F)
1947
-20.0 C (-4.0 F)
1948
-24.4 C (-11.9 F)
1949
-15.0 C (5.0 F)
1951
-20.6 C (-5.1 F)
1952
-12.8 C (9.0 F)
1953
-13.3 C (8.1 F)
1954
-15.6 C (3.9 F)
1955
-18.9 C (-2.0 F)
1956
-13.3 C (8.1 F)
1957
-21.7 C (-7.1 F)
1958
-23.3 C (-9.9 F)
1959
-20.6 C (-5.1 F)
1960
-17.8 C (0.0 F)
1961
-20.0 C (-4.0 F)
1962
-22.2 C (-8.0 F)
1963
-27.2 C (-17.0 F)
Wettest day (Rx1day)
The wettest day of the year at Marietta Wtr Wks, 1893 to 1963. The record is 93.5 mm (3.7 in) in 1922, marked on the chart; the median year is 50.8 mm (2.0 in).
Wettest day (Rx1day) at Marietta Wtr Wks by year
Year
Wettest day (Rx1day)
1893
71.1 mm (2.8 in)
1894
54.1 mm (2.1 in)
1895
41.7 mm (1.6 in)
1896
66.0 mm (2.6 in)
1897
45.2 mm (1.8 in)
1898
43.7 mm (1.7 in)
1899
62.5 mm (2.5 in)
1900
50.8 mm (2.0 in)
1901
58.4 mm (2.3 in)
1902
55.9 mm (2.2 in)
1903
36.8 mm (1.4 in)
1904
32.0 mm (1.3 in)
1905
57.9 mm (2.3 in)
1906
49.5 mm (1.9 in)
1907
73.7 mm (2.9 in)
1908
34.0 mm (1.3 in)
1909
72.4 mm (2.9 in)
1910
33.3 mm (1.3 in)
1911
53.8 mm (2.1 in)
1912
34.8 mm (1.4 in)
1913
58.7 mm (2.3 in)
1914
36.8 mm (1.4 in)
1915
52.6 mm (2.1 in)
1916
36.1 mm (1.4 in)
1917
53.8 mm (2.1 in)
1918
64.8 mm (2.6 in)
1919
64.8 mm (2.6 in)
1920
48.3 mm (1.9 in)
1921
61.2 mm (2.4 in)
1922
93.5 mm (3.7 in)
1923
48.3 mm (1.9 in)
1924
57.4 mm (2.3 in)
1925
53.8 mm (2.1 in)
1926
44.5 mm (1.8 in)
1927
63.5 mm (2.5 in)
1928
58.4 mm (2.3 in)
1929
39.6 mm (1.6 in)
1930
30.7 mm (1.2 in)
1931
37.8 mm (1.5 in)
1932
62.7 mm (2.5 in)
1933
62.2 mm (2.4 in)
1934
64.8 mm (2.6 in)
1940
50.8 mm (2.0 in)
1941
79.2 mm (3.1 in)
1942
48.8 mm (1.9 in)
1943
43.9 mm (1.7 in)
1944
42.9 mm (1.7 in)
1945
56.1 mm (2.2 in)
1946
43.2 mm (1.7 in)
1947
61.7 mm (2.4 in)
1948
71.1 mm (2.8 in)
1949
39.4 mm (1.6 in)
1951
25.4 mm (1.0 in)
1952
61.5 mm (2.4 in)
1953
49.0 mm (1.9 in)
1954
62.0 mm (2.4 in)
1955
55.9 mm (2.2 in)
1956
39.4 mm (1.6 in)
1957
43.9 mm (1.7 in)
1958
34.0 mm (1.3 in)
1959
38.1 mm (1.5 in)
1960
48.8 mm (1.9 in)
1961
35.6 mm (1.4 in)
1962
56.4 mm (2.2 in)
1963
14.7 mm (0.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Marietta Wtr Wks, 1893 to 1963. The record is 182.5 mm (7.2 in) in 1941, marked on the chart; the median year is 77.6 mm (3.1 in).
Wettest five days (Rx5day) at Marietta Wtr Wks by year
Year
Wettest five days (Rx5day)
1893
11.7 mm (0.5 in)
1894
62.0 mm (2.4 in)
1895
11.7 mm (0.5 in)
1896
113.3 mm (4.5 in)
1897
37.4 mm (1.5 in)
1898
96.1 mm (3.8 in)
1899
82.0 mm (3.2 in)
1900
77.6 mm (3.1 in)
1901
132.6 mm (5.2 in)
1902
65.8 mm (2.6 in)
1903
69.3 mm (2.7 in)
1904
50.8 mm (2.0 in)
1905
100.1 mm (3.9 in)
1906
75.3 mm (3.0 in)
1907
120.4 mm (4.7 in)
1908
63.6 mm (2.5 in)
1909
79.3 mm (3.1 in)
1910
53.4 mm (2.1 in)
1911
85.0 mm (3.3 in)
1912
60.5 mm (2.4 in)
1913
115.4 mm (4.5 in)
1914
57.9 mm (2.3 in)
1915
74.5 mm (2.9 in)
1916
70.9 mm (2.8 in)
1917
80.3 mm (3.2 in)
1918
89.4 mm (3.5 in)
1919
109.7 mm (4.3 in)
1920
68.9 mm (2.7 in)
1921
99.9 mm (3.9 in)
1922
91.2 mm (3.6 in)
1923
75.3 mm (3.0 in)
1924
80.3 mm (3.2 in)
1925
83.8 mm (3.3 in)
1926
111.0 mm (4.4 in)
1927
69.1 mm (2.7 in)
1928
82.8 mm (3.3 in)
1929
56.9 mm (2.2 in)
1930
39.2 mm (1.5 in)
1931
71.3 mm (2.8 in)
1932
63.6 mm (2.5 in)
1933
75.0 mm (3.0 in)
1934
73.9 mm (2.9 in)
1940
115.9 mm (4.6 in)
1941
182.5 mm (7.2 in)
1942
81.3 mm (3.2 in)
1943
79.2 mm (3.1 in)
1944
55.9 mm (2.2 in)
1945
96.1 mm (3.8 in)
1946
42.5 mm (1.7 in)
1947
54.4 mm (2.1 in)
1948
121.6 mm (4.8 in)
1949
77.7 mm (3.1 in)
1951
54.1 mm (2.1 in)
1952
99.6 mm (3.9 in)
1953
94.7 mm (3.7 in)
1954
82.9 mm (3.3 in)
1955
111.8 mm (4.4 in)
1956
72.4 mm (2.9 in)
1957
57.2 mm (2.3 in)
1958
109.0 mm (4.3 in)
1959
53.6 mm (2.1 in)
1960
57.3 mm (2.3 in)
1961
79.8 mm (3.1 in)
1962
84.3 mm (3.3 in)
1963
26.4 mm (1.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Marietta Wtr Wks, 1893 to 1963. The record is 32 days in 1901, marked on the chart; the median year is 16 days.
Longest dry spell (CDD) at Marietta Wtr Wks by year
Year
Longest dry spell (CDD)
1893
10 days
1894
11 days
1895
2 days
1896
18 days
1897
27 days
1898
14 days
1899
16 days
1900
18 days
1901
32 days
1902
16 days
1903
18 days
1904
24 days
1905
12 days
1906
16 days
1907
18 days
1908
20 days
1909
16 days
1910
18 days
1911
18 days
1912
11 days
1913
15 days
1914
19 days
1915
19 days
1916
23 days
1917
20 days
1918
13 days
1919
13 days
1920
24 days
1921
13 days
1922
25 days
1923
14 days
1924
30 days
1925
15 days
1926
11 days
1927
18 days
1928
11 days
1929
15 days
1930
19 days
1931
11 days
1932
15 days
1933
15 days
1934
24 days
1940
14 days
1941
24 days
1942
17 days
1943
18 days
1944
12 days
1945
16 days
1946
15 days
1947
17 days
1948
16 days
1949
15 days
1951
15 days
1952
23 days
1953
24 days
1954
15 days
1955
30 days
1956
14 days
1957
19 days
1958
14 days
1959
27 days
1960
19 days
1961
13 days
1962
14 days
1963
10 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
52 years with a frost
Across 52 years with a frost, the median last spring frost at Marietta Wtr Wks falls on 22 April and the median first autumn frost on 17 October, which leaves a median of 181 days between them.
Fitted over all years, the growing season changes by -2.3 days per decade at this station.
Frost dates and growing season at Marietta Wtr Wks
Measure
Median, all years
Earliest period
Recent period (1918 to 1962)
Recent against earliest
Fitted trend
Last spring frost
22 April
n/a
25 April
n/a
+0.8 days per decade
First autumn frost
17 October
n/a
15 October
n/a
-1.5 days per decade
Growing days
181 days
n/a
175 days
n/a
-2.3 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
38 years, 1899 to 1962
A day with at least 49.4 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 79.0 mm (3.1 in) of rain is expected about once in 100 years.
Rainfall return levels at Marietta Wtr Wks: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
49.4 mm (1.9 in)
5 years
60.4 mm (2.4 in)
10 years
66.2 mm (2.6 in)
25 years
72.2 mm (2.8 in)
50 years
75.9 mm (3.0 in)
Longer than the 38 years of record
100 years
79.0 mm (3.1 in)
Longer than the 38 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, 38 years of values from 1899 to 1962.
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: 79.2 mm (3.1 in) in 1941; 71.1 mm (2.8 in) in 1948; 64.8 mm (2.6 in) in 1934.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Marietta Wtr Wks standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Marietta Wtr Wks 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.