Record envelope, standing records and threshold days for White Rock (USC00037772), Arkansas, United States, with 33 years of record.
Key Facts for White Rock
White Rock (USC00037772) is a weather station in Arkansas, United States at 35.68 latitude and -93.95 longitude, 698 m (2,290 ft) above sea level.
The station reports from 1937 to 1969, 33 years of record.
1,464 records set at White Rock still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
White Rock set a daily record precipitation of 9.4 mm (0.37 in) on 30 December 1969.
About the Station
Location: Arkansas, United States, 35.68 latitude, -93.95 longitude.
Elevation: 698 m (2,290 ft).
Period of record: 1937 to 1969, 33 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 White Rock. 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 White Rock, 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)
-25.6 C (-14.1 F)
n/a
n/a
Feb
26.1 C (79.0 F)
-21.1 C (-6.0 F)
n/a
n/a
Mar
29.4 C (84.9 F)
-18.9 C (-2.0 F)
n/a
n/a
Apr
31.1 C (88.0 F)
-7.8 C (18.0 F)
n/a
n/a
May
31.7 C (89.1 F)
-2.2 C (28.0 F)
n/a
n/a
Jun
36.7 C (98.1 F)
7.2 C (45.0 F)
n/a
n/a
Jul
41.1 C (106.0 F)
11.7 C (53.1 F)
n/a
n/a
Aug
40.0 C (104.0 F)
10.0 C (50.0 F)
n/a
n/a
Sep
40.6 C (105.1 F)
-1.1 C (30.0 F)
n/a
n/a
Oct
33.3 C (91.9 F)
-5.0 C (23.0 F)
n/a
n/a
Nov
26.7 C (80.1 F)
-16.1 C (3.0 F)
n/a
n/a
Dec
23.3 C (73.9 F)
-20.6 C (-5.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at White Rock still stand. 1953 holds the most, with 84.
Standing records at White Rock by the year they were set
Year set
Standing records
1937
20
1938
56
1939
59
1940
61
1941
17
1942
52
1943
60
1944
36
1945
49
1946
36
1947
56
1948
49
1949
22
1950
56
1951
57
1952
58
1953
84
1954
81
1955
61
1956
43
1957
23
1958
36
1959
25
1960
45
1961
37
1962
55
1963
51
1964
42
1965
21
1966
39
1967
39
1968
22
1969
16
Wettest Day of Each Month
Jun: 149.9 mm (5.9 in)
The wettest day on record for each calendar month at White Rock. The most was 149.9 mm (5.9 in) on 10 June 1945.
Record daily precipitation for each month at White Rock
Month
Record daily precipitation (mm)
Date
Jan
81.3 mm (3.2 in)
30 January 1969
Feb
79.0 mm (3.1 in)
20 February 1955
Mar
103.4 mm (4.1 in)
9 March 1964
Apr
138.9 mm (5.5 in)
8 April 1944
May
116.8 mm (4.6 in)
9 May 1943
Jun
149.9 mm (5.9 in)
10 June 1945
Jul
139.7 mm (5.5 in)
22 July 1959
Aug
103.4 mm (4.1 in)
28 August 1965
Sep
139.7 mm (5.5 in)
12 September 1945
Oct
114.3 mm (4.5 in)
3 October 1959
Nov
113.5 mm (4.5 in)
5 November 1942
Dec
131.8 mm (5.2 in)
28 December 1954
Period of Record Coverage
1937 to 1969
Complete yearUnder 90 percent of days
33 years of record at White Rock, 1937 to 1969. 8 years have data for under 90 percent of days and are left out of rankings: 1937, 1938, 1952, 1965, 1966, 1967, 1968, 1969.
Cooler than the station meanWarmer than the station mean
One stripe for each of 25 complete years at White Rock, 1939 to 1967. Blue stripes are years cooler than the station's own mean of 14.3 C (57.8 F); red stripes are warmer. The coolest year was 1958, at 13.3 C (55.9 F), and the warmest was 1954, at 15.9 C (60.6 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at White Rock as warming stripes, 1939 to 1967
Year
Annual mean temperature
Difference from the station mean
1939
15.5 C
+1.11 C
1940
13.7 C
-0.69 C
1941
14.5 C
+0.20 C
1942
13.6 C
-0.70 C
1943
14.3 C
-0.08 C
1944
14.1 C
-0.27 C
1945
13.6 C
-0.72 C
1946
15.1 C
+0.73 C
1947
14.6 C
+0.24 C
1948
14.0 C
-0.33 C
1949
14.5 C
+0.16 C
1950
13.8 C
-0.58 C
1951
13.6 C
-0.70 C
1953
15.5 C
+1.13 C
1954
15.9 C
+1.55 C
1955
14.4 C
+0.04 C
1956
15.1 C
+0.71 C
1957
14.0 C
-0.32 C
1958
13.3 C
-1.04 C
1959
13.6 C
-0.73 C
1962
14.0 C
-0.30 C
1963
14.8 C
+0.45 C
1964
14.5 C
+0.15 C
1965
14.7 C
+0.32 C
1967
14.0 C
-0.33 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
1937 to 1969
Yearly extremes at White Rock: 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)
1954
35.6 C (96.1 F)
33
Coldest night (TNn)
-25.6 C (-14.1 F)
1940
-16.7 C (1.9 F)
33
Wettest day (Rx1day)
149.9 mm (5.9 in)
1945
80.5 mm (3.2 in)
33
Wettest five days (Rx5day)
317.1 mm (12.5 in)
1945
151.6 mm (6.0 in)
33
Longest dry spell (CDD)
35 days
1938
20 days
33
Hottest day (TXx)
The hottest day of the year at White Rock, 1937 to 1969. The record is 41.1 C (106.0 F) in 1954, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at White Rock by year
Year
Hottest day (TXx)
1937
36.1 C (97.0 F)
1938
34.4 C (93.9 F)
1939
38.9 C (102.0 F)
1940
37.2 C (99.0 F)
1941
34.4 C (93.9 F)
1942
34.4 C (93.9 F)
1943
40.0 C (104.0 F)
1944
35.6 C (96.1 F)
1945
36.1 C (97.0 F)
1946
36.7 C (98.1 F)
1947
40.6 C (105.1 F)
1948
32.8 C (91.0 F)
1949
33.9 C (93.0 F)
1950
31.1 C (88.0 F)
1951
36.7 C (98.1 F)
1952
37.2 C (99.0 F)
1953
37.2 C (99.0 F)
1954
41.1 C (106.0 F)
1955
33.9 C (93.0 F)
1956
38.9 C (102.0 F)
1957
35.0 C (95.0 F)
1958
32.2 C (90.0 F)
1959
32.2 C (90.0 F)
1960
35.0 C (95.0 F)
1961
31.1 C (88.0 F)
1962
35.6 C (96.1 F)
1963
37.8 C (100.0 F)
1964
39.4 C (102.9 F)
1965
35.0 C (95.0 F)
1966
37.2 C (99.0 F)
1967
32.8 C (91.0 F)
1968
32.8 C (91.0 F)
1969
36.1 C (97.0 F)
Coldest night (TNn)
The coldest night of the year at White Rock, 1937 to 1969. The record is -25.6 C (-14.1 F) in 1940, marked on the chart; the median year is -16.7 C (1.9 F).
Coldest night (TNn) at White Rock by year
Year
Coldest night (TNn)
1937
-15.0 C (5.0 F)
1938
-15.6 C (3.9 F)
1939
-14.4 C (6.1 F)
1940
-25.6 C (-14.1 F)
1941
-12.8 C (9.0 F)
1942
-20.6 C (-5.1 F)
1943
-20.6 C (-5.1 F)
1944
-15.0 C (5.0 F)
1945
-20.0 C (-4.0 F)
1946
-15.6 C (3.9 F)
1947
-17.8 C (0.0 F)
1948
-18.9 C (-2.0 F)
1949
-16.7 C (1.9 F)
1950
-19.4 C (-2.9 F)
1951
-21.1 C (-6.0 F)
1952
-11.7 C (10.9 F)
1953
-15.6 C (3.9 F)
1954
-12.8 C (9.0 F)
1955
-18.9 C (-2.0 F)
1956
-15.0 C (5.0 F)
1957
-16.1 C (3.0 F)
1958
-15.6 C (3.9 F)
1959
-21.1 C (-6.0 F)
1960
-14.4 C (6.1 F)
1961
-19.4 C (-2.9 F)
1962
-23.3 C (-9.9 F)
1963
-21.7 C (-7.1 F)
1964
-17.8 C (0.0 F)
1965
-16.1 C (3.0 F)
1966
-21.1 C (-6.0 F)
1967
-13.9 C (7.0 F)
1968
-20.0 C (-4.0 F)
1969
-15.6 C (3.9 F)
Wettest day (Rx1day)
The wettest day of the year at White Rock, 1937 to 1969. The record is 149.9 mm (5.9 in) in 1945, marked on the chart; the median year is 80.5 mm (3.2 in).
Wettest day (Rx1day) at White Rock by year
Year
Wettest day (Rx1day)
1937
78.7 mm (3.1 in)
1938
63.5 mm (2.5 in)
1939
78.2 mm (3.1 in)
1940
49.8 mm (2.0 in)
1941
64.5 mm (2.5 in)
1942
113.5 mm (4.5 in)
1943
116.8 mm (4.6 in)
1944
138.9 mm (5.5 in)
1945
149.9 mm (5.9 in)
1946
95.3 mm (3.8 in)
1947
93.0 mm (3.7 in)
1948
58.9 mm (2.3 in)
1949
80.5 mm (3.2 in)
1950
73.9 mm (2.9 in)
1951
69.1 mm (2.7 in)
1952
92.5 mm (3.6 in)
1953
66.0 mm (2.6 in)
1954
131.8 mm (5.2 in)
1955
79.0 mm (3.1 in)
1956
101.6 mm (4.0 in)
1957
96.5 mm (3.8 in)
1958
82.6 mm (3.3 in)
1959
139.7 mm (5.5 in)
1960
71.1 mm (2.8 in)
1961
77.0 mm (3.0 in)
1962
61.2 mm (2.4 in)
1963
66.0 mm (2.6 in)
1964
103.4 mm (4.1 in)
1965
103.4 mm (4.1 in)
1966
67.6 mm (2.7 in)
1967
102.9 mm (4.1 in)
1968
70.4 mm (2.8 in)
1969
86.4 mm (3.4 in)
Wettest five days (Rx5day)
The wettest five days of the year at White Rock, 1937 to 1969. The record is 317.1 mm (12.5 in) in 1945, marked on the chart; the median year is 151.6 mm (6.0 in).
Wettest five days (Rx5day) at White Rock by year
Year
Wettest five days (Rx5day)
1937
95.5 mm (3.8 in)
1938
110.3 mm (4.3 in)
1939
112.5 mm (4.4 in)
1940
97.8 mm (3.9 in)
1941
123.7 mm (4.9 in)
1942
154.4 mm (6.1 in)
1943
214.3 mm (8.4 in)
1944
186.4 mm (7.3 in)
1945
317.1 mm (12.5 in)
1946
215.8 mm (8.5 in)
1947
114.3 mm (4.5 in)
1948
127.7 mm (5.0 in)
1949
173.5 mm (6.8 in)
1950
153.5 mm (6.0 in)
1951
161.0 mm (6.3 in)
1952
103.7 mm (4.1 in)
1953
116.3 mm (4.6 in)
1954
160.5 mm (6.3 in)
1955
160.5 mm (6.3 in)
1956
107.4 mm (4.2 in)
1957
185.6 mm (7.3 in)
1958
152.9 mm (6.0 in)
1959
231.1 mm (9.1 in)
1960
142.2 mm (5.6 in)
1961
149.3 mm (5.9 in)
1962
86.9 mm (3.4 in)
1963
97.3 mm (3.8 in)
1964
132.8 mm (5.2 in)
1965
172.0 mm (6.8 in)
1966
137.1 mm (5.4 in)
1967
169.2 mm (6.7 in)
1968
151.6 mm (6.0 in)
1969
156.8 mm (6.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at White Rock, 1937 to 1969. The record is 35 days in 1938, marked on the chart; the median year is 20 days.
Longest dry spell (CDD) at White Rock by year
Year
Longest dry spell (CDD)
1937
12 days
1938
35 days
1939
20 days
1940
16 days
1941
17 days
1942
19 days
1943
34 days
1944
30 days
1945
15 days
1946
20 days
1947
27 days
1948
31 days
1949
21 days
1950
24 days
1951
16 days
1952
24 days
1953
26 days
1954
21 days
1955
23 days
1956
18 days
1957
21 days
1958
14 days
1959
26 days
1960
17 days
1961
19 days
1962
22 days
1963
35 days
1964
19 days
1965
16 days
1966
19 days
1967
23 days
1968
19 days
1969
19 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
25 years with a frost
Across 25 years with a frost, the median last spring frost at White Rock falls on 10 April and the median first autumn frost on 5 November, which leaves a median of 206 days between them.
Fitted over all years, the growing season changes by +8.7 days per decade at this station.
Frost dates and growing season at White Rock
Measure
Median, all years
Earliest period
Recent period (1939 to 1967)
Recent against earliest
Fitted trend
Last spring frost
10 April
n/a
10 April
n/a
-4.4 days per decade
First autumn frost
5 November
n/a
5 November
n/a
+4.3 days per decade
Growing days
206 days
n/a
206 days
n/a
+8.7 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
31 years, 1939 to 1969
A day with at least 84.8 mm (3.3 in) of rain is expected about once in 2 years. A day with at least 178.3 mm (7.0 in) of rain is expected about once in 100 years.
Rainfall return levels at White Rock: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
84.8 mm (3.3 in)
5 years
108.5 mm (4.3 in)
10 years
124.8 mm (4.9 in)
25 years
145.8 mm (5.7 in)
50 years
161.9 mm (6.4 in)
Longer than the 31 years of record
100 years
178.3 mm (7.0 in)
Longer than the 31 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, 31 years of values from 1939 to 1969.
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: 149.9 mm (5.9 in) in 1945; 139.7 mm (5.5 in) in 1959; 138.9 mm (5.5 in) in 1944.
Download the Data
Data for White Rock standing records by year: CSV or JSON. Field meanings are on the data page.
Data for White Rock 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.