Record envelope, standing records and threshold days for Boone (USC00310977), North Carolina, United States, with 52 years of record.
Key Facts for Boone
Boone (USC00310977) is a weather station in North Carolina, United States at 36.22 latitude and -81.67 longitude, 988 m (3,241 ft) above sea level.
The station reports from 1929 to 1980, 52 years of record.
1,464 records set at Boone still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Boone tied a daily record low maximum temperature of 15.0 C (59.0 F) on 17 May 1980.
About the Station
Location: North Carolina, United States, 36.22 latitude, -81.67 longitude.
Elevation: 988 m (3,241 ft).
Period of record: 1929 to 1980, 52 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 Boone. 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 Boone, 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)
-27.8 C (-18.0 F)
n/a
n/a
Feb
23.9 C (75.0 F)
-22.2 C (-8.0 F)
n/a
n/a
Mar
26.7 C (80.1 F)
-18.3 C (-0.9 F)
n/a
n/a
Apr
31.7 C (89.1 F)
-10.6 C (12.9 F)
n/a
n/a
May
31.1 C (88.0 F)
-4.4 C (24.1 F)
n/a
n/a
Jun
34.4 C (93.9 F)
0.6 C (33.1 F)
n/a
n/a
Jul
35.6 C (96.1 F)
3.3 C (37.9 F)
n/a
n/a
Aug
32.8 C (91.0 F)
0.6 C (33.1 F)
n/a
n/a
Sep
33.3 C (91.9 F)
-3.9 C (25.0 F)
n/a
n/a
Oct
30.6 C (87.1 F)
-10.0 C (14.0 F)
n/a
n/a
Nov
26.7 C (80.1 F)
-21.1 C (-6.0 F)
n/a
n/a
Dec
22.8 C (73.0 F)
-23.3 C (-9.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Boone still stand. 1929 holds the most, with 69.
Standing records at Boone by the year they were set
Year set
Standing records
1929
69
1930
45
1931
38
1932
43
1933
43
1934
35
1935
31
1936
45
1937
41
1938
36
1939
63
1940
41
1941
34
1942
25
1943
36
1944
22
1945
32
1946
25
1947
25
1948
19
1949
20
1950
31
1951
33
1952
25
1953
27
1954
33
1955
18
1956
26
1957
20
1958
22
1959
20
1960
30
1961
33
1962
30
1963
25
1964
24
1965
12
1966
14
1967
28
1968
15
1969
17
1970
20
1971
23
1972
18
1973
9
1974
30
1975
13
1976
23
1977
26
1978
24
1979
17
1980
10
All-Time Record Progression
3 new records
3 all-time records were set at Boone between 24 January 1963 and 18 October 1975. Each dot is a new record.
When Boone set new all-time records
Date
Kind
Detail
1963-01-24
Record low minimum temperature
Record low minimum temperature -24.4 C (-11.9 F)
1966-01-30
Record low minimum temperature
Record low minimum temperature -27.8 C (-18.0 F)
1975-10-18
Record daily precipitation
Record daily precipitation 145.5 mm (5.7 in)
Wettest Day of Each Month
Oct: 145.5 mm (5.7 in)
The wettest day on record for each calendar month at Boone. The most was 145.5 mm (5.7 in) on 18 October 1975.
Record daily precipitation for each month at Boone
Month
Record daily precipitation (mm)
Date
Jan
86.4 mm (3.4 in)
9 January 1935
Feb
113.3 mm (4.5 in)
13 February 1966
Mar
143.5 mm (5.6 in)
24 March 1979
Apr
118.9 mm (4.7 in)
5 April 1957
May
134.9 mm (5.3 in)
28 May 1973
Jun
130.6 mm (5.1 in)
17 June 1976
Jul
77.0 mm (3.0 in)
3 July 1933
Aug
141.0 mm (5.6 in)
30 August 1940
Sep
105.7 mm (4.2 in)
22 September 1979
Oct
145.5 mm (5.7 in)
18 October 1975
Nov
100.6 mm (4.0 in)
3 November 1947
Dec
100.8 mm (4.0 in)
24 December 1940
Period of Record Coverage
1929 to 1980
Complete yearUnder 90 percent of days
52 years of record at Boone, 1929 to 1980. 2 years have data for under 90 percent of days and are left out of rankings: 1947, 1980.
Cooler than the station meanWarmer than the station mean
One stripe for each of 47 complete years at Boone, 1929 to 1979. Blue stripes are years cooler than the station's own mean of 10.7 C (51.2 F); red stripes are warmer. The coolest year was 1930, at 8.4 C (47.1 F), and the warmest was 1939, at 12.5 C (54.4 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Boone as warming stripes, 1929 to 1979
Year
Annual mean temperature
Difference from the station mean
1929
11.2 C
+0.59 C
1930
8.4 C
-2.26 C
1931
11.3 C
+0.66 C
1932
11.4 C
+0.73 C
1933
11.7 C
+1.02 C
1934
11.1 C
+0.44 C
1935
11.0 C
+0.33 C
1936
11.4 C
+0.70 C
1937
10.8 C
+0.18 C
1938
11.7 C
+1.08 C
1939
12.5 C
+1.80 C
1942
10.7 C
+0.06 C
1943
10.9 C
+0.24 C
1944
10.4 C
-0.29 C
1945
10.6 C
-0.06 C
1946
10.8 C
+0.10 C
1948
10.9 C
+0.22 C
1949
11.3 C
+0.60 C
1950
10.5 C
-0.19 C
1952
10.6 C
-0.02 C
1953
10.8 C
+0.11 C
1954
10.6 C
-0.10 C
1955
10.2 C
-0.42 C
1956
10.4 C
-0.26 C
1957
10.6 C
-0.04 C
1958
9.8 C
-0.90 C
1959
11.2 C
+0.59 C
1960
9.8 C
-0.86 C
1961
10.4 C
-0.26 C
1962
10.5 C
-0.16 C
1963
9.9 C
-0.74 C
1964
10.6 C
-0.02 C
1965
10.9 C
+0.27 C
1966
9.9 C
-0.75 C
1967
10.3 C
-0.35 C
1968
10.0 C
-0.61 C
1969
9.7 C
-0.95 C
1970
10.6 C
-0.10 C
1971
10.7 C
+0.01 C
1972
10.5 C
-0.19 C
1973
10.9 C
+0.29 C
1974
11.0 C
+0.38 C
1975
11.2 C
+0.51 C
1976
10.0 C
-0.66 C
1977
10.6 C
-0.03 C
1978
10.5 C
-0.20 C
1979
10.4 C
-0.27 C
The annual mean temperature here has fallen by 0.14 C (0.02 to 0.26) per decade over 1929 to 1979. In Fahrenheit: 0.26 F (0.04 to 0.47) per decade. The slope is a straight line fitted to 47 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Boone
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.14 C (-0.26 to -0.02) per decade
-0.26 F (-0.47 to -0.04) per decade
1929 to 1979
47
Fall
Mean daily maximum
-0.3 C (-0.4 to -0.2) per decade
-0.5 F (-0.7 to -0.3) per decade
1929 to 1979
47
Fall
Mean daily minimum
0.00 C (-0.13 to 0.13) per decade
0.00 F (-0.24 to 0.24) per decade
1929 to 1979
47
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
1929 to 1980
Yearly extremes at Boone: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
35.6 C (96.1 F)
1936
30.6 C (87.1 F)
52
Coldest night (TNn)
-27.8 C (-18.0 F)
1966
-18.3 C (-0.9 F)
52
Wettest day (Rx1day)
145.5 mm (5.7 in)
1975
84.7 mm (3.3 in)
52
Wettest five days (Rx5day)
307.1 mm (12.1 in)
1940
128.6 mm (5.1 in)
52
Longest dry spell (CDD)
31 days
1941
17 days
52
Hottest day (TXx)
The hottest day of the year at Boone, 1929 to 1980. The record is 35.6 C (96.1 F) in 1936, marked on the chart; the median year is 30.6 C (87.1 F).
Hottest day (TXx) at Boone by year
Year
Hottest day (TXx)
1929
32.2 C (90.0 F)
1930
29.4 C (84.9 F)
1931
31.7 C (89.1 F)
1932
32.2 C (90.0 F)
1933
32.2 C (90.0 F)
1934
33.3 C (91.9 F)
1935
31.7 C (89.1 F)
1936
35.6 C (96.1 F)
1937
31.1 C (88.0 F)
1938
30.6 C (87.1 F)
1939
31.1 C (88.0 F)
1940
31.1 C (88.0 F)
1941
31.7 C (89.1 F)
1942
31.7 C (89.1 F)
1943
30.0 C (86.0 F)
1944
32.8 C (91.0 F)
1945
30.0 C (86.0 F)
1946
29.4 C (84.9 F)
1947
31.7 C (89.1 F)
1948
30.0 C (86.0 F)
1949
31.1 C (88.0 F)
1950
28.9 C (84.0 F)
1951
32.8 C (91.0 F)
1952
33.9 C (93.0 F)
1953
31.1 C (88.0 F)
1954
33.3 C (91.9 F)
1955
29.4 C (84.9 F)
1956
31.7 C (89.1 F)
1957
30.0 C (86.0 F)
1958
29.4 C (84.9 F)
1959
30.6 C (87.1 F)
1960
29.4 C (84.9 F)
1961
27.8 C (82.0 F)
1962
30.0 C (86.0 F)
1963
29.4 C (84.9 F)
1964
30.6 C (87.1 F)
1965
28.9 C (84.0 F)
1966
30.6 C (87.1 F)
1967
27.8 C (82.0 F)
1968
31.7 C (89.1 F)
1969
29.4 C (84.9 F)
1970
30.6 C (87.1 F)
1971
28.9 C (84.0 F)
1972
29.4 C (84.9 F)
1973
31.7 C (89.1 F)
1974
27.2 C (81.0 F)
1975
27.8 C (82.0 F)
1976
28.3 C (82.9 F)
1977
31.1 C (88.0 F)
1978
31.1 C (88.0 F)
1979
29.4 C (84.9 F)
1980
27.2 C (81.0 F)
Coldest night (TNn)
The coldest night of the year at Boone, 1929 to 1980. The record is -27.8 C (-18.0 F) in 1966, marked on the chart; the median year is -18.3 C (-0.9 F).
Coldest night (TNn) at Boone by year
Year
Coldest night (TNn)
1929
-21.1 C (-6.0 F)
1930
-20.0 C (-4.0 F)
1931
-16.7 C (1.9 F)
1932
-15.6 C (3.9 F)
1933
-20.6 C (-5.1 F)
1934
-20.6 C (-5.1 F)
1935
-18.3 C (-0.9 F)
1936
-21.1 C (-6.0 F)
1937
-17.8 C (0.0 F)
1938
-15.6 C (3.9 F)
1939
-13.9 C (7.0 F)
1940
-18.9 C (-2.0 F)
1941
-16.1 C (3.0 F)
1942
-21.1 C (-6.0 F)
1943
-18.3 C (-0.9 F)
1944
-16.7 C (1.9 F)
1945
-17.2 C (1.0 F)
1946
-15.6 C (3.9 F)
1947
-14.4 C (6.1 F)
1948
-18.3 C (-0.9 F)
1949
-13.9 C (7.0 F)
1950
-19.4 C (-2.9 F)
1951
-19.4 C (-2.9 F)
1952
-16.1 C (3.0 F)
1953
-17.2 C (1.0 F)
1954
-17.2 C (1.0 F)
1955
-20.6 C (-5.1 F)
1956
-17.8 C (0.0 F)
1957
-23.3 C (-9.9 F)
1958
-22.2 C (-8.0 F)
1959
-19.4 C (-2.9 F)
1960
-20.0 C (-4.0 F)
1961
-18.9 C (-2.0 F)
1962
-21.7 C (-7.1 F)
1963
-24.4 C (-11.9 F)
1964
-16.1 C (3.0 F)
1965
-15.6 C (3.9 F)
1966
-27.8 C (-18.0 F)
1967
-21.7 C (-7.1 F)
1968
-16.1 C (3.0 F)
1969
-16.1 C (3.0 F)
1970
-22.8 C (-9.0 F)
1971
-18.3 C (-0.9 F)
1972
-23.3 C (-9.9 F)
1973
-18.3 C (-0.9 F)
1974
-14.4 C (6.1 F)
1975
-15.6 C (3.9 F)
1976
-18.3 C (-0.9 F)
1977
-25.0 C (-13.0 F)
1978
-20.6 C (-5.1 F)
1979
-20.0 C (-4.0 F)
1980
-17.8 C (0.0 F)
Wettest day (Rx1day)
The wettest day of the year at Boone, 1929 to 1980. The record is 145.5 mm (5.7 in) in 1975, marked on the chart; the median year is 84.7 mm (3.3 in).
Wettest day (Rx1day) at Boone by year
Year
Wettest day (Rx1day)
1929
63.5 mm (2.5 in)
1930
49.5 mm (1.9 in)
1931
80.3 mm (3.2 in)
1932
95.5 mm (3.8 in)
1933
77.0 mm (3.0 in)
1934
99.8 mm (3.9 in)
1935
88.9 mm (3.5 in)
1936
104.1 mm (4.1 in)
1937
69.9 mm (2.8 in)
1938
89.9 mm (3.5 in)
1939
69.9 mm (2.8 in)
1940
141.0 mm (5.6 in)
1941
88.9 mm (3.5 in)
1942
94.5 mm (3.7 in)
1943
65.3 mm (2.6 in)
1944
72.6 mm (2.9 in)
1945
107.7 mm (4.2 in)
1946
81.0 mm (3.2 in)
1947
100.6 mm (4.0 in)
1948
88.9 mm (3.5 in)
1949
116.8 mm (4.6 in)
1950
62.2 mm (2.4 in)
1951
72.4 mm (2.9 in)
1952
88.4 mm (3.5 in)
1953
69.6 mm (2.7 in)
1954
109.5 mm (4.3 in)
1955
63.8 mm (2.5 in)
1956
64.5 mm (2.5 in)
1957
118.9 mm (4.7 in)
1958
89.2 mm (3.5 in)
1959
72.9 mm (2.9 in)
1960
53.6 mm (2.1 in)
1961
68.8 mm (2.7 in)
1962
62.7 mm (2.5 in)
1963
71.1 mm (2.8 in)
1964
98.0 mm (3.9 in)
1965
72.4 mm (2.9 in)
1966
113.3 mm (4.5 in)
1967
58.9 mm (2.3 in)
1968
78.2 mm (3.1 in)
1969
90.7 mm (3.6 in)
1970
97.8 mm (3.9 in)
1971
50.3 mm (2.0 in)
1972
109.2 mm (4.3 in)
1973
134.9 mm (5.3 in)
1974
64.0 mm (2.5 in)
1975
145.5 mm (5.7 in)
1976
130.6 mm (5.1 in)
1977
93.0 mm (3.7 in)
1978
63.5 mm (2.5 in)
1979
143.5 mm (5.6 in)
1980
80.5 mm (3.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Boone, 1929 to 1980. The record is 307.1 mm (12.1 in) in 1940, marked on the chart; the median year is 128.6 mm (5.1 in).
Wettest five days (Rx5day) at Boone by year
Year
Wettest five days (Rx5day)
1929
139.3 mm (5.5 in)
1930
63.5 mm (2.5 in)
1931
89.2 mm (3.5 in)
1932
174.5 mm (6.9 in)
1933
111.0 mm (4.4 in)
1934
114.5 mm (4.5 in)
1935
138.5 mm (5.5 in)
1936
113.7 mm (4.5 in)
1937
122.7 mm (4.8 in)
1938
164.6 mm (6.5 in)
1939
87.7 mm (3.5 in)
1940
307.1 mm (12.1 in)
1941
175.8 mm (6.9 in)
1942
171.5 mm (6.8 in)
1943
88.9 mm (3.5 in)
1944
84.4 mm (3.3 in)
1945
182.3 mm (7.2 in)
1946
111.8 mm (4.4 in)
1947
123.5 mm (4.9 in)
1948
155.4 mm (6.1 in)
1949
139.7 mm (5.5 in)
1950
171.5 mm (6.8 in)
1951
124.7 mm (4.9 in)
1952
115.7 mm (4.6 in)
1953
96.0 mm (3.8 in)
1954
127.3 mm (5.0 in)
1955
104.2 mm (4.1 in)
1956
94.1 mm (3.7 in)
1957
201.3 mm (7.9 in)
1958
132.9 mm (5.2 in)
1959
134.2 mm (5.3 in)
1960
87.7 mm (3.5 in)
1961
129.9 mm (5.1 in)
1962
84.8 mm (3.3 in)
1963
111.5 mm (4.4 in)
1964
147.8 mm (5.8 in)
1965
79.0 mm (3.1 in)
1966
156.5 mm (6.2 in)
1967
116.8 mm (4.6 in)
1968
172.0 mm (6.8 in)
1969
96.7 mm (3.8 in)
1970
199.2 mm (7.8 in)
1971
138.2 mm (5.4 in)
1972
195.2 mm (7.7 in)
1973
166.4 mm (6.6 in)
1974
111.0 mm (4.4 in)
1975
158.7 mm (6.2 in)
1976
180.4 mm (7.1 in)
1977
177.2 mm (7.0 in)
1978
112.0 mm (4.4 in)
1979
152.9 mm (6.0 in)
1980
103.6 mm (4.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Boone, 1929 to 1980. The record is 31 days in 1941, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Boone by year
Year
Longest dry spell (CDD)
1929
14 days
1930
16 days
1931
20 days
1932
16 days
1933
29 days
1934
15 days
1935
21 days
1936
18 days
1937
14 days
1938
11 days
1939
18 days
1940
12 days
1941
31 days
1942
20 days
1943
25 days
1944
22 days
1945
18 days
1946
17 days
1947
14 days
1948
18 days
1949
15 days
1950
15 days
1951
14 days
1952
30 days
1953
30 days
1954
14 days
1955
18 days
1956
19 days
1957
14 days
1958
23 days
1959
19 days
1960
14 days
1961
15 days
1962
13 days
1963
24 days
1964
11 days
1965
19 days
1966
10 days
1967
19 days
1968
20 days
1969
12 days
1970
21 days
1971
14 days
1972
16 days
1973
15 days
1974
18 days
1975
11 days
1976
18 days
1977
14 days
1978
24 days
1979
13 days
1980
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
47 years with a frost
Across 47 years with a frost, the median last spring frost at Boone falls on 29 April and the median first autumn frost on 5 October, which leaves a median of 158 days between them.
Fitted over all years, the growing season changes by +1.2 days per decade at this station.
Frost dates and growing season at Boone
Measure
Median, all years
Earliest period
Recent period (1949 to 1979)
Recent against earliest
Fitted trend
Last spring frost
29 April
n/a
30 April
n/a
+0.4 days per decade
First autumn frost
5 October
n/a
5 October
n/a
+1.6 days per decade
Growing days
158 days
n/a
159 days
n/a
+1.2 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, 1929 to 1979
A day with at least 82.6 mm (3.3 in) of rain is expected about once in 2 years. A day with at least 164.7 mm (6.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Boone: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
82.6 mm (3.3 in)
5 years
105.0 mm (4.1 in)
10 years
119.7 mm (4.7 in)
25 years
138.0 mm (5.4 in)
50 years
151.4 mm (6.0 in)
Longer than the 47 years of record
100 years
164.7 mm (6.5 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 1929 to 1979.
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: 145.5 mm (5.7 in) in 1975; 143.5 mm (5.6 in) in 1979; 134.9 mm (5.3 in) in 1973.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Boone, at 1958. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1958 ran 0.3 C (0.5 F) higher than in the years before (possible change).
Suspected changes in the annual mean temperature at Boone, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1958
+0.3
+0.5
possible
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for Boone standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Boone 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.