Record envelope, standing records and threshold days for Okolona (USC00226515), Mississippi, United States, with 94 years of record.
Key Facts for Okolona
Okolona (USC00226515) is a weather station in Mississippi, United States at 34.00 latitude and -88.75 longitude, 98 m (322 ft) above sea level.
The station reports from 1893 to 1986, 94 years of record.
1,464 records set at Okolona still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Okolona set a daily record precipitation of 41.4 mm (1.6 in) on 15 October 1985.
About the Station
Location: Mississippi, United States, 34.00 latitude, -88.75 longitude.
Elevation: 98 m (322 ft).
Period of record: 1893 to 1986, 94 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 Okolona. 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 Okolona, 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
31.7 C (89.1 F)
-17.2 C (1.0 F)
n/a
n/a
Mar
32.2 C (90.0 F)
-12.8 C (9.0 F)
n/a
n/a
Apr
34.4 C (93.9 F)
-2.8 C (27.0 F)
n/a
n/a
May
38.3 C (100.9 F)
1.1 C (34.0 F)
n/a
n/a
Jun
40.6 C (105.1 F)
8.3 C (46.9 F)
n/a
n/a
Jul
42.2 C (108.0 F)
11.7 C (53.1 F)
n/a
n/a
Aug
41.7 C (107.1 F)
11.7 C (53.1 F)
n/a
n/a
Sep
43.3 C (109.9 F)
2.8 C (37.0 F)
n/a
n/a
Oct
37.2 C (99.0 F)
-3.9 C (25.0 F)
n/a
n/a
Nov
30.6 C (87.1 F)
-10.0 C (14.0 F)
n/a
n/a
Dec
28.9 C (84.0 F)
-16.1 C (3.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Okolona still stand. 1902 holds the most, with 83.
Standing records at Okolona by the year they were set
Year set
Standing records
1893
10
1894
4
1895
49
1896
72
1897
43
1898
46
1899
48
1900
31
1901
50
1902
83
1903
48
1904
35
1905
58
1906
27
1907
58
1908
30
1909
41
1910
35
1911
50
1912
31
1913
33
1914
41
1915
42
1916
50
1917
58
1918
61
1919
30
1920
24
1921
39
1922
34
1923
33
1924
62
1925
62
1926
29
1927
17
All-Time Record Progression
3 new records
3 all-time records were set at Okolona between 5 September 1925 and 28 March 1951. Each dot is a new record.
When Okolona set new all-time records
Date
Kind
Detail
1925-09-05
Record high maximum temperature
Record high maximum temperature 43.3 C (109.9 F)
1946-07-19
Record daily precipitation
Record daily precipitation 132.1 mm (5.2 in)
1951-03-28
Record daily precipitation
Record daily precipitation 254.0 mm (10.0 in)
Wettest Day of Each Month
Mar: 254.0 mm (10.0 in)
The wettest day on record for each calendar month at Okolona. The most was 254.0 mm (10.0 in) on 28 March 1951.
Record daily precipitation for each month at Okolona
Month
Record daily precipitation (mm)
Date
Jan
119.4 mm (4.7 in)
3 January 1949
Feb
136.1 mm (5.4 in)
20 February 1961
Mar
254.0 mm (10.0 in)
28 March 1951
Apr
111.0 mm (4.4 in)
4 April 1911
May
85.9 mm (3.4 in)
19 May 1983
Jun
102.1 mm (4.0 in)
27 June 1976
Jul
132.1 mm (5.2 in)
19 July 1946
Aug
91.4 mm (3.6 in)
4 August 1908
Sep
101.6 mm (4.0 in)
28 September 1906
Oct
130.0 mm (5.1 in)
3 October 1957
Nov
114.3 mm (4.5 in)
13 November 1961
Dec
142.2 mm (5.6 in)
3 December 1983
Period of Record Coverage
1893 to 1927
Complete yearUnder 90 percent of days
35 years of record at Okolona, 1893 to 1927. 5 years have data for under 90 percent of days and are left out of rankings: 1893, 1894, 1896, 1906, 1927.
Cooler than the station meanWarmer than the station mean
One stripe for each of 24 complete years at Okolona, 1900 to 1926. Blue stripes are years cooler than the station's own mean of 17.1 C (62.9 F); red stripes are warmer. The coolest year was 1917, at 15.6 C (60.0 F), and the warmest was 1921, at 19.4 C (66.9 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Okolona as warming stripes, 1900 to 1926
Year
Annual mean temperature
Difference from the station mean
1900
17.2 C
+0.07 C
1901
16.1 C
-1.04 C
1902
17.3 C
+0.17 C
1904
16.9 C
-0.21 C
1905
17.0 C
-0.18 C
1907
17.0 C
-0.13 C
1908
17.2 C
+0.09 C
1909
17.0 C
-0.17 C
1910
16.4 C
-0.71 C
1911
17.9 C
+0.71 C
1912
16.4 C
-0.79 C
1913
16.7 C
-0.48 C
1914
16.5 C
-0.61 C
1915
16.6 C
-0.60 C
1916
16.7 C
-0.44 C
1917
15.6 C
-1.58 C
1918
17.0 C
-0.11 C
1919
18.0 C
+0.81 C
1920
16.9 C
-0.27 C
1921
19.4 C
+2.22 C
1922
18.5 C
+1.30 C
1924
17.3 C
+0.19 C
1925
19.2 C
+2.06 C
1926
16.8 C
-0.37 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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 1986
Yearly extremes at Okolona: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
43.3 C (109.9 F)
1925
38.9 C (102.0 F)
35
Coldest night (TNn)
-21.1 C (-6.0 F)
1918
-11.7 C (10.9 F)
35
Wettest day (Rx1day)
254.0 mm (10.0 in)
1951
76.2 mm (3.0 in)
82
Wettest five days (Rx5day)
382.8 mm (15.1 in)
1951
118.6 mm (4.7 in)
82
Longest dry spell (CDD)
58 days
1904
24 days
82
Hottest day (TXx)
The hottest day of the year at Okolona, 1893 to 1986. The record is 43.3 C (109.9 F) in 1925, marked on the chart; the median year is 38.9 C (102.0 F).
Hottest day (TXx) at Okolona by year
Year
Hottest day (TXx)
1893
27.2 C (81.0 F)
1894
31.1 C (88.0 F)
1895
38.3 C (100.9 F)
1896
41.7 C (107.1 F)
1897
41.1 C (106.0 F)
1898
38.3 C (100.9 F)
1899
40.0 C (104.0 F)
1900
37.8 C (100.0 F)
1901
42.2 C (108.0 F)
1902
41.1 C (106.0 F)
1903
39.4 C (102.9 F)
1904
38.9 C (102.0 F)
1905
38.3 C (100.9 F)
1906
37.8 C (100.0 F)
1907
39.4 C (102.9 F)
1908
37.8 C (100.0 F)
1909
39.4 C (102.9 F)
1910
36.1 C (97.0 F)
1911
38.9 C (102.0 F)
1912
38.3 C (100.9 F)
1913
37.2 C (99.0 F)
1914
40.6 C (105.1 F)
1915
37.2 C (99.0 F)
1916
36.7 C (98.1 F)
1917
36.7 C (98.1 F)
1918
40.6 C (105.1 F)
1919
40.6 C (105.1 F)
1920
37.2 C (99.0 F)
1921
40.6 C (105.1 F)
1922
39.4 C (102.9 F)
1923
37.8 C (100.0 F)
1924
41.1 C (106.0 F)
1925
43.3 C (109.9 F)
1926
38.9 C (102.0 F)
1927
29.4 C (84.9 F)
1940
n/a
1941
n/a
1942
n/a
1943
n/a
1944
n/a
1945
n/a
1946
n/a
1947
n/a
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
n/a
1964
n/a
1965
n/a
1966
n/a
1967
n/a
1968
n/a
1969
n/a
1970
n/a
1971
n/a
1972
n/a
1973
n/a
1974
n/a
1975
n/a
1976
n/a
1977
n/a
1978
n/a
1979
n/a
1980
n/a
1981
n/a
1982
n/a
1983
n/a
1984
n/a
1985
n/a
1986
n/a
Coldest night (TNn)
The coldest night of the year at Okolona, 1893 to 1986. The record is -21.1 C (-6.0 F) in 1918, marked on the chart; the median year is -11.7 C (10.9 F).
Coldest night (TNn) at Okolona by year
Year
Coldest night (TNn)
1893
-12.2 C (10.0 F)
1894
-6.7 C (19.9 F)
1895
-16.1 C (3.0 F)
1896
-11.7 C (10.9 F)
1897
-13.3 C (8.1 F)
1898
-12.8 C (9.0 F)
1899
-12.8 C (9.0 F)
1900
-12.2 C (10.0 F)
1901
-16.1 C (3.0 F)
1902
-10.6 C (12.9 F)
1903
-14.4 C (6.1 F)
1904
-10.6 C (12.9 F)
1905
-13.9 C (7.0 F)
1906
-6.7 C (19.9 F)
1907
-6.7 C (19.9 F)
1908
-10.6 C (12.9 F)
1909
-10.6 C (12.9 F)
1910
-11.1 C (12.0 F)
1911
-14.4 C (6.1 F)
1912
-17.2 C (1.0 F)
1913
-6.7 C (19.9 F)
1914
-11.1 C (12.0 F)
1915
-6.7 C (19.9 F)
1916
-11.7 C (10.9 F)
1917
-15.0 C (5.0 F)
1918
-21.1 C (-6.0 F)
1919
-13.3 C (8.1 F)
1920
-9.4 C (15.1 F)
1921
-8.3 C (17.1 F)
1922
-8.3 C (17.1 F)
1923
-11.7 C (10.9 F)
1924
-15.6 C (3.9 F)
1925
-11.7 C (10.9 F)
1926
-11.1 C (12.0 F)
1927
-14.4 C (6.1 F)
1940
n/a
1941
n/a
1942
n/a
1943
n/a
1944
n/a
1945
n/a
1946
n/a
1947
n/a
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
n/a
1964
n/a
1965
n/a
1966
n/a
1967
n/a
1968
n/a
1969
n/a
1970
n/a
1971
n/a
1972
n/a
1973
n/a
1974
n/a
1975
n/a
1976
n/a
1977
n/a
1978
n/a
1979
n/a
1980
n/a
1981
n/a
1982
n/a
1983
n/a
1984
n/a
1985
n/a
1986
n/a
Wettest day (Rx1day)
The wettest day of the year at Okolona, 1893 to 1986. The record is 254.0 mm (10.0 in) in 1951, marked on the chart; the median year is 76.2 mm (3.0 in).
Wettest day (Rx1day) at Okolona by year
Year
Wettest day (Rx1day)
1893
48.8 mm (1.9 in)
1894
19.6 mm (0.8 in)
1895
57.7 mm (2.3 in)
1896
78.7 mm (3.1 in)
1897
64.5 mm (2.5 in)
1898
57.4 mm (2.3 in)
1899
54.1 mm (2.1 in)
1900
72.4 mm (2.9 in)
1901
66.0 mm (2.6 in)
1902
94.0 mm (3.7 in)
1903
59.7 mm (2.4 in)
1904
50.8 mm (2.0 in)
1905
61.0 mm (2.4 in)
1906
101.6 mm (4.0 in)
1907
92.7 mm (3.6 in)
1908
91.4 mm (3.6 in)
1909
103.6 mm (4.1 in)
1910
76.2 mm (3.0 in)
1911
111.0 mm (4.4 in)
1912
74.9 mm (2.9 in)
1913
97.8 mm (3.9 in)
1914
82.6 mm (3.3 in)
1915
76.2 mm (3.0 in)
1916
121.9 mm (4.8 in)
1917
61.0 mm (2.4 in)
1918
52.1 mm (2.1 in)
1919
54.4 mm (2.1 in)
1920
63.0 mm (2.5 in)
1921
60.5 mm (2.4 in)
1922
53.3 mm (2.1 in)
1923
59.9 mm (2.4 in)
1924
62.2 mm (2.4 in)
1925
94.0 mm (3.7 in)
1926
59.7 mm (2.4 in)
1927
54.6 mm (2.1 in)
1940
71.1 mm (2.8 in)
1941
44.7 mm (1.8 in)
1942
101.6 mm (4.0 in)
1943
50.8 mm (2.0 in)
1944
53.3 mm (2.1 in)
1945
72.4 mm (2.9 in)
1946
132.1 mm (5.2 in)
1947
63.5 mm (2.5 in)
1948
76.2 mm (3.0 in)
1949
119.4 mm (4.7 in)
1950
83.8 mm (3.3 in)
1951
254.0 mm (10.0 in)
1952
50.8 mm (2.0 in)
1953
58.4 mm (2.3 in)
1954
89.7 mm (3.5 in)
1955
89.2 mm (3.5 in)
1956
80.3 mm (3.2 in)
1957
130.0 mm (5.1 in)
1958
87.1 mm (3.4 in)
1959
65.0 mm (2.6 in)
1960
85.1 mm (3.4 in)
1961
136.1 mm (5.4 in)
1962
63.2 mm (2.5 in)
1963
83.8 mm (3.3 in)
1964
78.5 mm (3.1 in)
1965
50.8 mm (2.0 in)
1966
90.2 mm (3.6 in)
1967
85.6 mm (3.4 in)
1968
57.2 mm (2.3 in)
1969
132.6 mm (5.2 in)
1970
105.9 mm (4.2 in)
1971
78.7 mm (3.1 in)
1972
81.0 mm (3.2 in)
1973
152.9 mm (6.0 in)
1974
63.5 mm (2.5 in)
1975
125.2 mm (4.9 in)
1976
102.1 mm (4.0 in)
1977
85.3 mm (3.4 in)
1978
82.0 mm (3.2 in)
1979
94.5 mm (3.7 in)
1980
101.6 mm (4.0 in)
1981
74.9 mm (2.9 in)
1982
138.9 mm (5.5 in)
1983
142.2 mm (5.6 in)
1984
61.5 mm (2.4 in)
1985
59.7 mm (2.4 in)
1986
48.5 mm (1.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Okolona, 1893 to 1986. The record is 382.8 mm (15.1 in) in 1951, marked on the chart; the median year is 118.6 mm (4.7 in).
Wettest five days (Rx5day) at Okolona by year
Year
Wettest five days (Rx5day)
1893
61.3 mm (2.4 in)
1894
20.4 mm (0.8 in)
1895
89.5 mm (3.5 in)
1896
157.2 mm (6.2 in)
1897
105.7 mm (4.2 in)
1898
101.1 mm (4.0 in)
1899
79.2 mm (3.1 in)
1900
143.5 mm (5.6 in)
1901
105.4 mm (4.1 in)
1902
160.9 mm (6.3 in)
1903
85.1 mm (3.4 in)
1904
87.7 mm (3.5 in)
1905
112.4 mm (4.4 in)
1906
157.6 mm (6.2 in)
1907
92.7 mm (3.6 in)
1908
134.6 mm (5.3 in)
1909
122.6 mm (4.8 in)
1910
148.7 mm (5.9 in)
1911
147.9 mm (5.8 in)
1912
172.6 mm (6.8 in)
1913
114.5 mm (4.5 in)
1914
125.8 mm (5.0 in)
1915
100.4 mm (4.0 in)
1916
223.6 mm (8.8 in)
1917
113.1 mm (4.5 in)
1918
66.8 mm (2.6 in)
1919
96.7 mm (3.8 in)
1920
109.7 mm (4.3 in)
1921
102.4 mm (4.0 in)
1922
129.7 mm (5.1 in)
1923
113.5 mm (4.5 in)
1924
91.1 mm (3.6 in)
1925
135.1 mm (5.3 in)
1926
165.6 mm (6.5 in)
1927
75.9 mm (3.0 in)
1940
102.4 mm (4.0 in)
1941
79.8 mm (3.1 in)
1942
101.6 mm (4.0 in)
1943
101.6 mm (4.0 in)
1944
78.8 mm (3.1 in)
1945
108.0 mm (4.3 in)
1946
179.8 mm (7.1 in)
1947
102.8 mm (4.0 in)
1948
127.0 mm (5.0 in)
1949
233.7 mm (9.2 in)
1950
157.6 mm (6.2 in)
1951
382.8 mm (15.1 in)
1952
87.7 mm (3.5 in)
1953
95.2 mm (3.7 in)
1954
105.4 mm (4.1 in)
1955
152.0 mm (6.0 in)
1956
144.8 mm (5.7 in)
1957
195.6 mm (7.7 in)
1958
145.3 mm (5.7 in)
1959
92.2 mm (3.6 in)
1960
92.5 mm (3.6 in)
1961
221.4 mm (8.7 in)
1962
117.3 mm (4.6 in)
1963
127.7 mm (5.0 in)
1964
129.1 mm (5.1 in)
1965
161.7 mm (6.4 in)
1966
107.2 mm (4.2 in)
1967
111.0 mm (4.4 in)
1968
148.5 mm (5.8 in)
1969
159.8 mm (6.3 in)
1970
159.8 mm (6.3 in)
1971
110.5 mm (4.4 in)
1972
140.2 mm (5.5 in)
1973
219.7 mm (8.6 in)
1974
119.9 mm (4.7 in)
1975
176.1 mm (6.9 in)
1976
120.9 mm (4.8 in)
1977
161.7 mm (6.4 in)
1978
129.0 mm (5.1 in)
1979
155.8 mm (6.1 in)
1980
159.8 mm (6.3 in)
1981
98.3 mm (3.9 in)
1982
259.5 mm (10.2 in)
1983
178.1 mm (7.0 in)
1984
109.8 mm (4.3 in)
1985
82.1 mm (3.2 in)
1986
72.2 mm (2.8 in)
Longest dry spell (CDD)
The longest dry spell of the year at Okolona, 1893 to 1986. The record is 58 days in 1904, marked on the chart; the median year is 24 days.
Longest dry spell (CDD) at Okolona by year
Year
Longest dry spell (CDD)
1893
15 days
1894
16 days
1895
15 days
1896
23 days
1897
50 days
1898
22 days
1899
43 days
1900
18 days
1901
24 days
1902
32 days
1903
48 days
1904
58 days
1905
33 days
1906
38 days
1907
34 days
1908
31 days
1909
27 days
1910
24 days
1911
29 days
1912
20 days
1913
20 days
1914
24 days
1915
32 days
1916
20 days
1917
19 days
1918
24 days
1919
14 days
1920
31 days
1921
24 days
1922
25 days
1923
26 days
1924
41 days
1925
32 days
1926
22 days
1927
13 days
1940
28 days
1941
35 days
1942
27 days
1943
27 days
1944
26 days
1945
18 days
1946
29 days
1947
22 days
1948
19 days
1949
20 days
1950
24 days
1951
27 days
1952
30 days
1953
43 days
1954
30 days
1955
9 days
1956
18 days
1957
33 days
1958
27 days
1959
11 days
1960
10 days
1961
30 days
1962
21 days
1963
34 days
1964
21 days
1965
15 days
1966
25 days
1967
17 days
1968
22 days
1969
21 days
1970
25 days
1971
21 days
1972
20 days
1973
15 days
1974
17 days
1975
17 days
1976
17 days
1977
15 days
1978
24 days
1979
14 days
1980
24 days
1981
23 days
1982
20 days
1983
20 days
1984
25 days
1985
17 days
1986
26 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
24 years with a frost
Across 24 years with a frost, the median last spring frost at Okolona falls on 29 March and the median first autumn frost on 5 November, which leaves a median of 223 days between them.
Frost dates and growing season at Okolona
Measure
Median, all years
Earliest period
Recent period (1900 to 1926)
Recent against earliest
Fitted trend
Last spring frost
29 March
n/a
29 March
n/a
n/a
First autumn frost
5 November
n/a
5 November
n/a
n/a
Growing days
223 days
n/a
223 days
n/a
n/a
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
64 years, 1898 to 1985
A day with at least 77.9 mm (3.1 in) of rain is expected about once in 2 years. A day with at least 213.5 mm (8.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Okolona: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
77.9 mm (3.1 in)
5 years
104.5 mm (4.1 in)
10 years
125.5 mm (4.9 in)
25 years
156.5 mm (6.2 in)
50 years
183.3 mm (7.2 in)
100 years
213.5 mm (8.4 in)
Longer than the 64 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, 64 years of values from 1898 to 1985.
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: 254.0 mm (10.0 in) in 1951; 152.9 mm (6.0 in) in 1973; 142.2 mm (5.6 in) in 1983.
Download the Data
Data for Okolona standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Okolona 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.