Record envelope, standing records and threshold days for Richton 1 N (USC00227444), Mississippi, United States, with 48 years of record.
Key Facts for Richton 1 N
Richton 1 N (USC00227444) is a weather station in Mississippi, United States at 31.37 latitude and -88.93 longitude, 50 m (165 ft) above sea level.
The station reports from 1958 to 2005, 48 years of record.
1,464 records set at Richton 1 N still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Richton 1 N set a daily record low maximum temperature of 7.8 C (46.0 F) on 18 March 2005.
About the Station
Location: Mississippi, United States, 31.37 latitude, -88.93 longitude.
Elevation: 50 m (165 ft).
Period of record: 1958 to 2005, 48 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 Richton 1 N. 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 Richton 1 N, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
27.2 C (81.0 F)
-16.1 C (3.0 F)
n/a
n/a
Feb
29.4 C (84.9 F)
-13.3 C (8.1 F)
n/a
n/a
Mar
32.2 C (90.0 F)
-10.0 C (14.0 F)
n/a
n/a
Apr
34.4 C (93.9 F)
-3.3 C (26.1 F)
n/a
n/a
May
36.1 C (97.0 F)
0.6 C (33.1 F)
n/a
n/a
Jun
40.6 C (105.1 F)
6.1 C (43.0 F)
n/a
n/a
Jul
39.4 C (102.9 F)
11.1 C (52.0 F)
n/a
n/a
Aug
38.9 C (102.0 F)
11.7 C (53.1 F)
n/a
n/a
Sep
37.8 C (100.0 F)
1.1 C (34.0 F)
n/a
n/a
Oct
35.6 C (96.1 F)
-3.9 C (25.0 F)
n/a
n/a
Nov
31.7 C (89.1 F)
-8.9 C (16.0 F)
n/a
n/a
Dec
28.3 C (82.9 F)
-15.0 C (5.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Richton 1 N still stand. 1963 holds the most, with 62.
Standing records at Richton 1 N by the year they were set
Year set
Standing records
1958
5
1959
36
1960
33
1961
34
1962
48
1963
62
1964
29
1965
36
1966
43
1967
59
1968
31
1969
48
1970
34
1971
28
1972
44
1973
31
1974
38
1975
27
1976
28
1977
22
1978
24
1979
38
1980
46
1981
32
1982
37
1983
23
1984
34
1985
28
1986
24
1987
41
1988
40
1989
46
1990
15
1991
32
1992
17
1993
26
1994
21
1995
31
1996
34
1997
32
1998
47
1999
12
2000
1
2001
4
2002
13
2003
16
2004
30
2005
4
All-Time Record Progression
3 new records
3 all-time records were set at Richton 1 N between 23 December 1989 and 26 September 2002. Each dot is a new record.
When Richton 1 N set new all-time records
Date
Kind
Detail
1989-12-23
Record low maximum temperature
Record low maximum temperature -7.2 C (19.0 F)
1998-06-15
Record high minimum temperature
Record high minimum temperature 25.0 C (77.0 F)
2002-09-26
Record daily precipitation
Record daily precipitation 269.2 mm (10.6 in)
Wettest Day of Each Month
Sep: 269.2 mm (10.6 in)
The wettest day on record for each calendar month at Richton 1 N. The most was 269.2 mm (10.6 in) on 26 September 2002.
Record daily precipitation for each month at Richton 1 N
Month
Record daily precipitation (mm)
Date
Jan
168.1 mm (6.6 in)
21 January 1993
Feb
129.5 mm (5.1 in)
18 February 1961
Mar
116.1 mm (4.6 in)
2 March 1991
Apr
244.9 mm (9.6 in)
7 April 1983
May
127.0 mm (5.0 in)
13 May 1990
Jun
88.1 mm (3.5 in)
1 June 1959
Jul
87.6 mm (3.4 in)
29 July 1984
Aug
82.6 mm (3.3 in)
18 August 1969
Sep
269.2 mm (10.6 in)
26 September 2002
Oct
87.9 mm (3.5 in)
30 October 1993
Nov
104.1 mm (4.1 in)
14 November 1961
Dec
165.1 mm (6.5 in)
10 December 1961
Period of Record Coverage
1958 to 2005
Complete yearUnder 90 percent of days
48 years of record at Richton 1 N, 1958 to 2005. 6 years have data for under 90 percent of days and are left out of rankings: 1958, 1999, 2000, 2001, 2002, 2005.
Cooler than the station meanWarmer than the station mean
One stripe for each of 41 complete years at Richton 1 N, 1959 to 2004. Blue stripes are years cooler than the station's own mean of 17.8 C (64.0 F); red stripes are warmer. The coolest year was 1968, at 16.6 C (61.9 F), and the warmest was 1998, at 19.2 C (66.6 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Richton 1 N as warming stripes, 1959 to 2004
Year
Annual mean temperature
Difference from the station mean
1959
18.2 C
+0.36 C
1960
17.7 C
-0.11 C
1961
17.7 C
-0.14 C
1962
18.1 C
+0.25 C
1963
17.5 C
-0.32 C
1964
17.4 C
-0.36 C
1965
17.6 C
-0.22 C
1966
17.2 C
-0.60 C
1967
17.4 C
-0.45 C
1968
16.6 C
-1.21 C
1969
17.1 C
-0.66 C
1970
17.2 C
-0.56 C
1971
17.7 C
-0.07 C
1972
18.2 C
+0.42 C
1973
18.0 C
+0.20 C
1974
18.0 C
+0.23 C
1975
18.2 C
+0.42 C
1976
16.9 C
-0.94 C
1977
17.7 C
-0.14 C
1978
17.6 C
-0.18 C
1979
17.5 C
-0.32 C
1980
18.2 C
+0.37 C
1981
17.9 C
+0.10 C
1982
18.9 C
+1.08 C
1983
17.2 C
-0.60 C
1984
18.2 C
+0.40 C
1985
18.0 C
+0.24 C
1986
18.5 C
+0.66 C
1987
17.6 C
-0.24 C
1988
17.6 C
-0.25 C
1989
17.4 C
-0.42 C
1990
18.5 C
+0.65 C
1991
18.2 C
+0.35 C
1992
17.4 C
-0.40 C
1993
17.2 C
-0.64 C
1994
18.0 C
+0.22 C
1995
18.4 C
+0.62 C
1996
17.9 C
+0.09 C
1997
18.0 C
+0.16 C
1998
19.2 C
+1.42 C
2004
18.2 C
+0.43 C
The annual mean temperature here has risen by 0.16 C (0.03 to 0.29) per decade over 1959 to 2004. In Fahrenheit: 0.3 F (0.1 to 0.5) per decade. The slope is a straight line fitted to 41 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Richton 1 N
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.16 C (0.03 to 0.29) per decade
0.3 F (0.1 to 0.5) per decade
1959 to 2004
41
Rise
Mean daily maximum
0.01 C (-0.15 to 0.17) per decade
0.02 F (-0.27 to 0.30) per decade
1959 to 2004
41
Not clearly different from zero
Mean daily minimum
0.3 C (0.1 to 0.5) per decade
0.6 F (0.2 to 0.9) per decade
1959 to 2004
41
Rise
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
1958 to 2005
Yearly extremes at Richton 1 N: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.6 C (105.1 F)
1963
36.7 C (98.1 F)
48
Coldest night (TNn)
-16.1 C (3.0 F)
1985
-9.4 C (15.1 F)
48
Wettest day (Rx1day)
269.2 mm (10.6 in)
2002
87.6 mm (3.4 in)
48
Wettest five days (Rx5day)
327.1 mm (12.9 in)
1961
126.5 mm (5.0 in)
48
Longest dry spell (CDD)
44 days
1960
19 days
48
Hottest day (TXx)
The hottest day of the year at Richton 1 N, 1958 to 2005. The record is 40.6 C (105.1 F) in 1963, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Richton 1 N by year
Year
Hottest day (TXx)
1958
29.4 C (84.9 F)
1959
36.1 C (97.0 F)
1960
38.3 C (100.9 F)
1961
35.6 C (96.1 F)
1962
37.8 C (100.0 F)
1963
40.6 C (105.1 F)
1964
36.7 C (98.1 F)
1965
36.1 C (97.0 F)
1966
37.2 C (99.0 F)
1967
36.1 C (97.0 F)
1968
36.1 C (97.0 F)
1969
38.3 C (100.9 F)
1970
37.2 C (99.0 F)
1971
36.1 C (97.0 F)
1972
37.8 C (100.0 F)
1973
36.7 C (98.1 F)
1974
36.1 C (97.0 F)
1975
35.6 C (96.1 F)
1976
36.1 C (97.0 F)
1977
36.7 C (98.1 F)
1978
36.7 C (98.1 F)
1979
37.8 C (100.0 F)
1980
39.4 C (102.9 F)
1981
37.2 C (99.0 F)
1982
36.7 C (98.1 F)
1983
36.7 C (98.1 F)
1984
35.6 C (96.1 F)
1985
37.8 C (100.0 F)
1986
38.9 C (102.0 F)
1987
37.8 C (100.0 F)
1988
40.6 C (105.1 F)
1989
35.6 C (96.1 F)
1990
37.2 C (99.0 F)
1991
34.4 C (93.9 F)
1992
35.6 C (96.1 F)
1993
35.0 C (95.0 F)
1994
35.6 C (96.1 F)
1995
38.3 C (100.9 F)
1996
38.3 C (100.9 F)
1997
37.8 C (100.0 F)
1998
38.9 C (102.0 F)
1999
28.3 C (82.9 F)
2000
28.3 C (82.9 F)
2001
26.7 C (80.1 F)
2002
35.0 C (95.0 F)
2003
33.3 C (91.9 F)
2004
36.7 C (98.1 F)
2005
28.9 C (84.0 F)
Coldest night (TNn)
The coldest night of the year at Richton 1 N, 1958 to 2005. The record is -16.1 C (3.0 F) in 1985, marked on the chart; the median year is -9.4 C (15.1 F).
Coldest night (TNn) at Richton 1 N by year
Year
Coldest night (TNn)
1958
-8.9 C (16.0 F)
1959
-8.3 C (17.1 F)
1960
-11.1 C (12.0 F)
1961
-10.0 C (14.0 F)
1962
-15.0 C (5.0 F)
1963
-15.0 C (5.0 F)
1964
-12.2 C (10.0 F)
1965
-9.4 C (15.1 F)
1966
-13.9 C (7.0 F)
1967
-8.3 C (17.1 F)
1968
-9.4 C (15.1 F)
1969
-10.6 C (12.9 F)
1970
-13.9 C (7.0 F)
1971
-10.6 C (12.9 F)
1972
-8.9 C (16.0 F)
1973
-8.9 C (16.0 F)
1974
-7.2 C (19.0 F)
1975
-7.8 C (18.0 F)
1976
-9.4 C (15.1 F)
1977
-12.8 C (9.0 F)
1978
-9.4 C (15.1 F)
1979
-12.2 C (10.0 F)
1980
-10.0 C (14.0 F)
1981
-12.2 C (10.0 F)
1982
-15.6 C (3.9 F)
1983
-13.9 C (7.0 F)
1984
-11.7 C (10.9 F)
1985
-16.1 C (3.0 F)
1986
-8.9 C (16.0 F)
1987
-6.7 C (19.9 F)
1988
-10.0 C (14.0 F)
1989
-15.0 C (5.0 F)
1990
-6.1 C (21.0 F)
1991
-8.3 C (17.1 F)
1992
-6.1 C (21.0 F)
1993
-8.3 C (17.1 F)
1994
-8.3 C (17.1 F)
1995
-7.8 C (18.0 F)
1996
-13.3 C (8.1 F)
1997
-9.4 C (15.1 F)
1998
-5.6 C (21.9 F)
1999
-10.0 C (14.0 F)
2000
-1.7 C (28.9 F)
2001
-5.6 C (21.9 F)
2002
-8.3 C (17.1 F)
2003
-10.0 C (14.0 F)
2004
-6.7 C (19.9 F)
2005
-6.1 C (21.0 F)
Wettest day (Rx1day)
The wettest day of the year at Richton 1 N, 1958 to 2005. The record is 269.2 mm (10.6 in) in 2002, marked on the chart; the median year is 87.6 mm (3.4 in).
Wettest day (Rx1day) at Richton 1 N by year
Year
Wettest day (Rx1day)
1958
25.9 mm (1.0 in)
1959
88.1 mm (3.5 in)
1960
69.9 mm (2.8 in)
1961
165.1 mm (6.5 in)
1962
73.7 mm (2.9 in)
1963
53.8 mm (2.1 in)
1964
82.8 mm (3.3 in)
1965
118.1 mm (4.6 in)
1966
68.8 mm (2.7 in)
1967
88.9 mm (3.5 in)
1968
76.2 mm (3.0 in)
1969
103.4 mm (4.1 in)
1970
87.1 mm (3.4 in)
1971
83.8 mm (3.3 in)
1972
89.7 mm (3.5 in)
1973
104.1 mm (4.1 in)
1974
104.1 mm (4.1 in)
1975
101.6 mm (4.0 in)
1976
101.6 mm (4.0 in)
1977
108.0 mm (4.3 in)
1978
59.7 mm (2.4 in)
1979
112.5 mm (4.4 in)
1980
91.2 mm (3.6 in)
1981
71.6 mm (2.8 in)
1982
80.3 mm (3.2 in)
1983
244.9 mm (9.6 in)
1984
100.8 mm (4.0 in)
1985
99.6 mm (3.9 in)
1986
86.1 mm (3.4 in)
1987
82.3 mm (3.2 in)
1988
65.8 mm (2.6 in)
1989
63.5 mm (2.5 in)
1990
127.0 mm (5.0 in)
1991
116.1 mm (4.6 in)
1992
79.0 mm (3.1 in)
1993
168.1 mm (6.6 in)
1994
107.2 mm (4.2 in)
1995
73.7 mm (2.9 in)
1996
69.9 mm (2.8 in)
1997
66.0 mm (2.6 in)
1998
121.2 mm (4.8 in)
1999
116.8 mm (4.6 in)
2000
43.2 mm (1.7 in)
2001
57.2 mm (2.3 in)
2002
269.2 mm (10.6 in)
2003
76.2 mm (3.0 in)
2004
114.3 mm (4.5 in)
2005
50.8 mm (2.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Richton 1 N, 1958 to 2005. The record is 327.1 mm (12.9 in) in 1961, marked on the chart; the median year is 126.5 mm (5.0 in).
Wettest five days (Rx5day) at Richton 1 N by year
Year
Wettest five days (Rx5day)
1958
37.3 mm (1.5 in)
1959
128.0 mm (5.0 in)
1960
94.0 mm (3.7 in)
1961
327.1 mm (12.9 in)
1962
100.1 mm (3.9 in)
1963
99.1 mm (3.9 in)
1964
125.2 mm (4.9 in)
1965
125.7 mm (4.9 in)
1966
171.1 mm (6.7 in)
1967
110.8 mm (4.4 in)
1968
130.1 mm (5.1 in)
1969
168.7 mm (6.6 in)
1970
96.5 mm (3.8 in)
1971
175.0 mm (6.9 in)
1972
118.9 mm (4.7 in)
1973
127.0 mm (5.0 in)
1974
171.9 mm (6.8 in)
1975
169.4 mm (6.7 in)
1976
117.1 mm (4.6 in)
1977
140.0 mm (5.5 in)
1978
96.8 mm (3.8 in)
1979
222.0 mm (8.7 in)
1980
172.1 mm (6.8 in)
1981
126.0 mm (5.0 in)
1982
146.6 mm (5.8 in)
1983
279.9 mm (11.0 in)
1984
112.5 mm (4.4 in)
1985
232.4 mm (9.1 in)
1986
110.0 mm (4.3 in)
1987
136.9 mm (5.4 in)
1988
112.7 mm (4.4 in)
1989
86.1 mm (3.4 in)
1990
173.0 mm (6.8 in)
1991
170.2 mm (6.7 in)
1992
112.3 mm (4.4 in)
1993
222.2 mm (8.7 in)
1994
122.2 mm (4.8 in)
1995
117.1 mm (4.6 in)
1996
110.3 mm (4.3 in)
1997
88.4 mm (3.5 in)
1998
216.5 mm (8.5 in)
1999
160.0 mm (6.3 in)
2000
49.5 mm (1.9 in)
2001
95.4 mm (3.8 in)
2002
269.2 mm (10.6 in)
2003
156.2 mm (6.1 in)
2004
194.4 mm (7.7 in)
2005
95.3 mm (3.8 in)
Longest dry spell (CDD)
The longest dry spell of the year at Richton 1 N, 1958 to 2005. The record is 44 days in 1960, marked on the chart; the median year is 19 days.
Longest dry spell (CDD) at Richton 1 N by year
Year
Longest dry spell (CDD)
1958
13 days
1959
19 days
1960
44 days
1961
24 days
1962
13 days
1963
34 days
1964
23 days
1965
29 days
1966
18 days
1967
28 days
1968
23 days
1969
18 days
1970
19 days
1971
20 days
1972
19 days
1973
13 days
1974
18 days
1975
19 days
1976
17 days
1977
19 days
1978
38 days
1979
31 days
1980
17 days
1981
23 days
1982
25 days
1983
19 days
1984
18 days
1985
18 days
1986
22 days
1987
34 days
1988
32 days
1989
17 days
1990
19 days
1991
28 days
1992
22 days
1993
18 days
1994
17 days
1995
22 days
1996
18 days
1997
19 days
1998
21 days
1999
10 days
2000
6 days
2001
20 days
2002
13 days
2003
16 days
2004
21 days
2005
14 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
41 years with a frost
Across 41 years with a frost, the median last spring frost at Richton 1 N falls on 26 March and the median first autumn frost on 3 November, which leaves a median of 220 days between them.
Fitted over all years, the growing season changes by +2.8 days per decade at this station.
Frost dates and growing season at Richton 1 N
Measure
Median, all years
Earliest period
Recent period (1970 to 2004)
Recent against earliest
Fitted trend
Last spring frost
26 March
n/a
28 March
n/a
0.0 days per decade
First autumn frost
3 November
n/a
4 November
n/a
+2.8 days per decade
Growing days
220 days
n/a
221 days
n/a
+2.8 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
41 years, 1959 to 2004
A day with at least 88.6 mm (3.5 in) of rain is expected about once in 2 years. A day with at least 223.5 mm (8.8 in) of rain is expected about once in 100 years.
Rainfall return levels at Richton 1 N: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
88.6 mm (3.5 in)
5 years
115.3 mm (4.5 in)
10 years
136.2 mm (5.4 in)
25 years
167.0 mm (6.6 in)
50 years
193.6 mm (7.6 in)
Longer than the 41 years of record
100 years
223.5 mm (8.8 in)
Longer than the 41 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, 41 years of values from 1959 to 2004.
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: 244.9 mm (9.6 in) in 1983; 168.1 mm (6.6 in) in 1993; 165.1 mm (6.5 in) in 1961.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Richton 1 N standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Richton 1 N 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.