Record envelope, standing records and threshold days for Rockwood 2 (USC00407834), Tennessee, United States, with 65 years of record.
Key Facts for Rockwood 2
Rockwood 2 (USC00407834) is a weather station in Tennessee, United States at 35.84 latitude and -84.69 longitude, 234 m (767 ft) above sea level.
The station reports from 1962 to 2026, 65 years of record.
1,464 records set at Rockwood 2 still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Rockwood 2 set a daily record precipitation of 30.5 mm (1.2 in) on 2 August 2026.
About the Station
Location: Tennessee, United States, 35.84 latitude, -84.69 longitude.
Elevation: 234 m (767 ft).
Period of record: 1962 to 2026, 65 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 Rockwood 2. 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 Rockwood 2, 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)
-24.4 C (-11.9 F)
n/a
n/a
Feb
25.6 C (78.1 F)
-23.3 C (-9.9 F)
n/a
n/a
Mar
30.0 C (86.0 F)
-17.2 C (1.0 F)
n/a
n/a
Apr
32.8 C (91.0 F)
-6.1 C (21.0 F)
n/a
n/a
May
33.9 C (93.0 F)
-2.2 C (28.0 F)
n/a
n/a
Jun
37.8 C (100.0 F)
2.2 C (36.0 F)
n/a
n/a
Jul
41.7 C (107.1 F)
7.8 C (46.0 F)
n/a
n/a
Aug
38.9 C (102.0 F)
6.7 C (44.1 F)
n/a
n/a
Sep
36.7 C (98.1 F)
-2.2 C (28.0 F)
n/a
n/a
Oct
31.7 C (89.1 F)
-6.1 C (21.0 F)
n/a
n/a
Nov
27.2 C (81.0 F)
-13.3 C (8.1 F)
n/a
n/a
Dec
25.0 C (77.0 F)
-22.2 C (-8.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Rockwood 2 still stand. 1963 holds the most, with 60.
Standing records at Rockwood 2 by the year they were set
Year set
Standing records
1962
38
1963
60
1964
31
1965
38
1966
40
1967
57
1968
50
1969
38
1970
31
1971
26
1972
27
1973
24
1974
38
1975
21
1976
49
1977
40
1978
30
1979
26
1980
45
1981
22
1982
21
1983
39
1984
40
1985
39
1986
33
1987
22
1988
26
1989
37
1990
21
1991
29
1992
22
1993
17
1994
14
1995
16
1996
26
1997
25
1998
29
1999
21
2000
21
2001
21
2002
8
2003
9
2004
17
2005
24
2006
20
2007
36
2008
16
2009
16
2010
35
2011
29
2012
4
All-Time Record Progression
1 new records
1 all-time records were set at Rockwood 2 between 14 March 1993 and 14 March 1993. Each dot is a new record.
When Rockwood 2 set new all-time records
Date
Kind
Detail
1993-03-14
Record daily snowfall
Record daily snowfall 35.6 cm (14.0 in)
Wettest Day of Each Month
May: 172.5 mm (6.8 in)
The wettest day on record for each calendar month at Rockwood 2. The most was 172.5 mm (6.8 in) on 28 May 1973.
Record daily precipitation for each month at Rockwood 2
Month
Record daily precipitation (mm)
Date
Jan
106.7 mm (4.2 in)
18 January 2002
Feb
125.2 mm (4.9 in)
6 February 2020
Mar
105.4 mm (4.1 in)
18 March 2002
Apr
108.5 mm (4.3 in)
13 April 2020
May
172.5 mm (6.8 in)
28 May 1973
Jun
109.2 mm (4.3 in)
20 June 1989
Jul
105.2 mm (4.1 in)
7 July 2013
Aug
116.6 mm (4.6 in)
17 August 1985
Sep
127.0 mm (5.0 in)
17 September 2004
Oct
92.7 mm (3.6 in)
5 October 1995
Nov
106.7 mm (4.2 in)
28 November 1973
Dec
124.5 mm (4.9 in)
26 December 1973
Period of Record Coverage
1962 to 2012
Complete yearUnder 90 percent of days
51 years of record at Rockwood 2, 1962 to 2012. 5 years have data for under 90 percent of days and are left out of rankings: 1962, 1982, 2001, 2002, 2012.
Cooler than the station meanWarmer than the station mean
One stripe for each of 39 complete years at Rockwood 2, 1963 to 2011. Blue stripes are years cooler than the station's own mean of 13.6 C (56.4 F); red stripes are warmer. The coolest year was 1976, at 12.2 C (54.0 F), and the warmest was 1998, at 15.3 C (59.5 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Rockwood 2 as warming stripes, 1963 to 2011
Year
Annual mean temperature
Difference from the station mean
1963
12.3 C
-1.25 C
1964
13.0 C
-0.60 C
1965
13.1 C
-0.47 C
1966
12.5 C
-1.13 C
1967
12.6 C
-1.01 C
1968
12.5 C
-1.13 C
1970
13.4 C
-0.20 C
1971
13.5 C
-0.10 C
1973
13.8 C
+0.23 C
1974
13.8 C
+0.23 C
1975
13.9 C
+0.32 C
1976
12.2 C
-1.37 C
1978
13.3 C
-0.30 C
1979
13.1 C
-0.45 C
1980
13.7 C
+0.16 C
1981
13.3 C
-0.24 C
1986
14.4 C
+0.77 C
1987
13.9 C
+0.35 C
1988
12.8 C
-0.79 C
1989
13.0 C
-0.61 C
1990
14.3 C
+0.69 C
1991
14.2 C
+0.62 C
1992
13.0 C
-0.58 C
1993
13.1 C
-0.50 C
1994
13.2 C
-0.36 C
1995
13.3 C
-0.26 C
1996
12.6 C
-0.99 C
1997
13.4 C
-0.19 C
1998
15.3 C
+1.69 C
1999
14.6 C
+1.05 C
2000
14.0 C
+0.37 C
2003
14.3 C
+0.68 C
2005
14.6 C
+1.01 C
2006
14.6 C
+0.97 C
2007
15.0 C
+1.40 C
2008
13.8 C
+0.22 C
2009
13.8 C
+0.24 C
2010
13.9 C
+0.33 C
2011
14.6 C
+1.06 C
The annual mean temperature here has risen by 0.3 C (0.2 to 0.5) per decade over 1963 to 2011. In Fahrenheit: 0.6 F (0.3 to 0.8) per decade. The slope is a straight line fitted to 39 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Rockwood 2
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.3 C (0.2 to 0.5) per decade
0.6 F (0.3 to 0.8) per decade
1963 to 2011
39
Rise
Mean daily maximum
0.1 C (-0.1 to 0.2) per decade
0.1 F (-0.2 to 0.4) per decade
1963 to 2011
39
Not clearly different from zero
Mean daily minimum
0.6 C (0.4 to 0.8) per decade
1.1 F (0.8 to 1.4) per decade
1963 to 2011
39
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
1962 to 2026
Yearly extremes at Rockwood 2: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.7 C (107.1 F)
1980
35.6 C (96.1 F)
51
Coldest night (TNn)
-24.4 C (-11.9 F)
1966
-15.6 C (3.9 F)
51
Wettest day (Rx1day)
172.5 mm (6.8 in)
1973
75.7 mm (3.0 in)
65
Wettest five days (Rx5day)
241.8 mm (9.5 in)
2019
126.8 mm (5.0 in)
65
Longest dry spell (CDD)
34 days
1998
16 days
65
Hottest day (TXx)
The hottest day of the year at Rockwood 2, 1962 to 2026. The record is 41.7 C (107.1 F) in 1980, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Rockwood 2 by year
Year
Hottest day (TXx)
1962
36.1 C (97.0 F)
1963
34.4 C (93.9 F)
1964
35.6 C (96.1 F)
1965
35.0 C (95.0 F)
1966
37.8 C (100.0 F)
1967
33.3 C (91.9 F)
1968
38.9 C (102.0 F)
1969
36.7 C (98.1 F)
1970
36.1 C (97.0 F)
1971
35.0 C (95.0 F)
1972
35.0 C (95.0 F)
1973
34.4 C (93.9 F)
1974
34.4 C (93.9 F)
1975
35.0 C (95.0 F)
1976
35.6 C (96.1 F)
1977
37.8 C (100.0 F)
1978
37.8 C (100.0 F)
1979
35.0 C (95.0 F)
1980
41.7 C (107.1 F)
1981
36.1 C (97.0 F)
1982
32.2 C (90.0 F)
1983
38.3 C (100.9 F)
1984
35.0 C (95.0 F)
1985
35.6 C (96.1 F)
1986
35.6 C (96.1 F)
1987
35.0 C (95.0 F)
1988
37.2 C (99.0 F)
1989
35.6 C (96.1 F)
1990
35.6 C (96.1 F)
1991
34.4 C (93.9 F)
1992
33.3 C (91.9 F)
1993
35.6 C (96.1 F)
1994
32.2 C (90.0 F)
1995
35.0 C (95.0 F)
1996
33.3 C (91.9 F)
1997
35.6 C (96.1 F)
1998
36.7 C (98.1 F)
1999
35.6 C (96.1 F)
2000
35.0 C (95.0 F)
2001
33.9 C (93.0 F)
2002
25.6 C (78.1 F)
2003
33.9 C (93.0 F)
2004
34.4 C (93.9 F)
2005
35.6 C (96.1 F)
2006
36.7 C (98.1 F)
2007
38.3 C (100.9 F)
2008
36.1 C (97.0 F)
2009
35.0 C (95.0 F)
2010
36.1 C (97.0 F)
2011
36.7 C (98.1 F)
2012
31.7 C (89.1 F)
2013
n/a
2014
n/a
2015
n/a
2016
n/a
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
2022
n/a
2023
n/a
2024
n/a
2025
n/a
2026
n/a
Coldest night (TNn)
The coldest night of the year at Rockwood 2, 1962 to 2026. The record is -24.4 C (-11.9 F) in 1966, marked on the chart; the median year is -15.6 C (3.9 F).
Coldest night (TNn) at Rockwood 2 by year
Year
Coldest night (TNn)
1962
-22.2 C (-8.0 F)
1963
-23.9 C (-11.0 F)
1964
-15.0 C (5.0 F)
1965
-17.8 C (0.0 F)
1966
-24.4 C (-11.9 F)
1967
-17.2 C (1.0 F)
1968
-16.1 C (3.0 F)
1969
-16.7 C (1.9 F)
1970
-20.6 C (-5.1 F)
1971
-17.8 C (0.0 F)
1972
-18.3 C (-0.9 F)
1973
-15.0 C (5.0 F)
1974
-10.6 C (12.9 F)
1975
-13.9 C (7.0 F)
1976
-17.8 C (0.0 F)
1977
-22.2 C (-8.0 F)
1978
-15.6 C (3.9 F)
1979
-17.2 C (1.0 F)
1980
-17.2 C (1.0 F)
1981
-16.1 C (3.0 F)
1982
-21.7 C (-7.1 F)
1983
-21.1 C (-6.0 F)
1984
-17.8 C (0.0 F)
1985
-21.1 C (-6.0 F)
1986
-18.3 C (-0.9 F)
1987
-12.2 C (10.0 F)
1988
-20.0 C (-4.0 F)
1989
-19.4 C (-2.9 F)
1990
-11.1 C (12.0 F)
1991
-15.0 C (5.0 F)
1992
-13.9 C (7.0 F)
1993
-14.4 C (6.1 F)
1994
-20.6 C (-5.1 F)
1995
-15.0 C (5.0 F)
1996
-23.3 C (-9.9 F)
1997
-15.6 C (3.9 F)
1998
-11.1 C (12.0 F)
1999
-10.6 C (12.9 F)
2000
-14.4 C (6.1 F)
2001
-12.2 C (10.0 F)
2002
-10.0 C (14.0 F)
2003
-15.6 C (3.9 F)
2004
-11.7 C (10.9 F)
2005
-11.7 C (10.9 F)
2006
-10.0 C (14.0 F)
2007
-11.7 C (10.9 F)
2008
-12.2 C (10.0 F)
2009
-15.6 C (3.9 F)
2010
-12.8 C (9.0 F)
2011
-12.2 C (10.0 F)
2012
8.9 C (48.0 F)
2013
n/a
2014
n/a
2015
n/a
2016
n/a
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
2022
n/a
2023
n/a
2024
n/a
2025
n/a
2026
n/a
Wettest day (Rx1day)
The wettest day of the year at Rockwood 2, 1962 to 2026. The record is 172.5 mm (6.8 in) in 1973, marked on the chart; the median year is 75.7 mm (3.0 in).
Wettest day (Rx1day) at Rockwood 2 by year
Year
Wettest day (Rx1day)
1962
83.3 mm (3.3 in)
1963
101.6 mm (4.0 in)
1964
58.4 mm (2.3 in)
1965
61.0 mm (2.4 in)
1966
75.4 mm (3.0 in)
1967
83.8 mm (3.3 in)
1968
58.4 mm (2.3 in)
1969
56.1 mm (2.2 in)
1970
73.7 mm (2.9 in)
1971
75.7 mm (3.0 in)
1972
75.4 mm (3.0 in)
1973
172.5 mm (6.8 in)
1974
102.1 mm (4.0 in)
1975
95.3 mm (3.8 in)
1976
55.9 mm (2.2 in)
1977
54.9 mm (2.2 in)
1978
59.7 mm (2.4 in)
1979
116.3 mm (4.6 in)
1980
94.0 mm (3.7 in)
1981
47.0 mm (1.9 in)
1982
52.3 mm (2.1 in)
1983
82.3 mm (3.2 in)
1984
68.8 mm (2.7 in)
1985
116.6 mm (4.6 in)
1986
78.2 mm (3.1 in)
1987
55.4 mm (2.2 in)
1988
100.6 mm (4.0 in)
1989
109.2 mm (4.3 in)
1990
101.6 mm (4.0 in)
1991
74.9 mm (2.9 in)
1992
52.1 mm (2.1 in)
1993
85.1 mm (3.4 in)
1994
57.7 mm (2.3 in)
1995
92.7 mm (3.6 in)
1996
68.6 mm (2.7 in)
1997
51.8 mm (2.0 in)
1998
83.1 mm (3.3 in)
1999
67.3 mm (2.6 in)
2000
83.8 mm (3.3 in)
2001
64.0 mm (2.5 in)
2002
106.7 mm (4.2 in)
2003
100.6 mm (4.0 in)
2004
127.0 mm (5.0 in)
2005
43.2 mm (1.7 in)
2006
76.5 mm (3.0 in)
2007
60.7 mm (2.4 in)
2008
99.1 mm (3.9 in)
2009
83.3 mm (3.3 in)
2010
84.3 mm (3.3 in)
2011
103.6 mm (4.1 in)
2012
45.7 mm (1.8 in)
2013
105.2 mm (4.1 in)
2014
59.4 mm (2.3 in)
2015
96.5 mm (3.8 in)
2016
75.7 mm (3.0 in)
2017
83.1 mm (3.3 in)
2018
55.9 mm (2.2 in)
2019
104.1 mm (4.1 in)
2020
125.2 mm (4.9 in)
2021
68.8 mm (2.7 in)
2022
85.9 mm (3.4 in)
2023
72.4 mm (2.9 in)
2024
65.8 mm (2.6 in)
2025
67.1 mm (2.6 in)
2026
53.3 mm (2.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Rockwood 2, 1962 to 2026. The record is 241.8 mm (9.5 in) in 2019, marked on the chart; the median year is 126.8 mm (5.0 in).
Wettest five days (Rx5day) at Rockwood 2 by year
Year
Wettest five days (Rx5day)
1962
135.1 mm (5.3 in)
1963
120.4 mm (4.7 in)
1964
102.6 mm (4.0 in)
1965
126.8 mm (5.0 in)
1966
111.5 mm (4.4 in)
1967
173.6 mm (6.8 in)
1968
84.4 mm (3.3 in)
1969
128.3 mm (5.1 in)
1970
123.2 mm (4.9 in)
1971
123.8 mm (4.9 in)
1972
133.6 mm (5.3 in)
1973
229.4 mm (9.0 in)
1974
145.9 mm (5.7 in)
1975
198.2 mm (7.8 in)
1976
82.2 mm (3.2 in)
1977
132.6 mm (5.2 in)
1978
79.7 mm (3.1 in)
1979
156.4 mm (6.2 in)
1980
147.6 mm (5.8 in)
1981
82.6 mm (3.3 in)
1982
103.7 mm (4.1 in)
1983
121.3 mm (4.8 in)
1984
119.9 mm (4.7 in)
1985
144.0 mm (5.7 in)
1986
96.0 mm (3.8 in)
1987
93.2 mm (3.7 in)
1988
117.7 mm (4.6 in)
1989
203.7 mm (8.0 in)
1990
170.7 mm (6.7 in)
1991
186.2 mm (7.3 in)
1992
84.0 mm (3.3 in)
1993
137.7 mm (5.4 in)
1994
138.9 mm (5.5 in)
1995
123.2 mm (4.9 in)
1996
119.4 mm (4.7 in)
1997
122.8 mm (4.8 in)
1998
164.6 mm (6.5 in)
1999
155.4 mm (6.1 in)
2000
116.3 mm (4.6 in)
2001
124.8 mm (4.9 in)
2002
216.4 mm (8.5 in)
2003
113.1 mm (4.5 in)
2004
136.6 mm (5.4 in)
2005
99.6 mm (3.9 in)
2006
115.0 mm (4.5 in)
2007
88.7 mm (3.5 in)
2008
136.9 mm (5.4 in)
2009
116.1 mm (4.6 in)
2010
135.9 mm (5.4 in)
2011
165.5 mm (6.5 in)
2012
54.9 mm (2.2 in)
2013
173.7 mm (6.8 in)
2014
108.9 mm (4.3 in)
2015
174.2 mm (6.9 in)
2016
129.6 mm (5.1 in)
2017
135.4 mm (5.3 in)
2018
190.3 mm (7.5 in)
2019
241.8 mm (9.5 in)
2020
163.3 mm (6.4 in)
2021
102.9 mm (4.1 in)
2022
129.3 mm (5.1 in)
2023
101.3 mm (4.0 in)
2024
138.9 mm (5.5 in)
2025
99.8 mm (3.9 in)
2026
110.5 mm (4.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Rockwood 2, 1962 to 2026. The record is 34 days in 1998, marked on the chart; the median year is 16 days.
Longest dry spell (CDD) at Rockwood 2 by year
Year
Longest dry spell (CDD)
1962
17 days
1963
27 days
1964
25 days
1965
20 days
1966
13 days
1967
17 days
1968
15 days
1969
11 days
1970
17 days
1971
13 days
1972
12 days
1973
15 days
1974
19 days
1975
8 days
1976
12 days
1977
16 days
1978
12 days
1979
18 days
1980
21 days
1981
15 days
1982
12 days
1983
13 days
1984
23 days
1985
13 days
1986
20 days
1987
21 days
1988
15 days
1989
14 days
1990
11 days
1991
10 days
1992
20 days
1993
18 days
1994
16 days
1995
15 days
1996
16 days
1997
15 days
1998
34 days
1999
29 days
2000
29 days
2001
29 days
2002
13 days
2003
20 days
2004
23 days
2005
15 days
2006
16 days
2007
19 days
2008
22 days
2009
15 days
2010
23 days
2011
7 days
2012
13 days
2013
17 days
2014
12 days
2015
20 days
2016
31 days
2017
15 days
2018
10 days
2019
29 days
2020
11 days
2021
18 days
2022
16 days
2023
18 days
2024
21 days
2025
11 days
2026
18 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
39 years with a frost
Across 39 years with a frost, the median last spring frost at Rockwood 2 falls on 17 April and the median first autumn frost on 20 October, which leaves a median of 190 days between them.
Fitted over all years, the growing season changes by +10.3 days per decade at this station.
Frost dates and growing season at Rockwood 2
Measure
Median, all years
Earliest period
Recent period (1974 to 2011)
Recent against earliest
Fitted trend
Last spring frost
17 April
n/a
11 April
n/a
-6.2 days per decade
First autumn frost
20 October
n/a
21 October
n/a
+4.1 days per decade
Growing days
190 days
n/a
193 days
n/a
+10.3 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
59 years, 1963 to 2025
A day with at least 75.6 mm (3.0 in) of rain is expected about once in 2 years. A day with at least 151.2 mm (6.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Rockwood 2: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
75.6 mm (3.0 in)
5 years
96.1 mm (3.8 in)
10 years
109.5 mm (4.3 in)
25 years
126.5 mm (5.0 in)
50 years
138.9 mm (5.5 in)
100 years
151.2 mm (6.0 in)
Longer than the 59 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, 59 years of values from 1963 to 2025.
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: 172.5 mm (6.8 in) in 1973; 125.2 mm (4.9 in) in 2020; 116.6 mm (4.6 in) in 1985.
Download the Data
Data for Rockwood 2 standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Rockwood 2 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.