Record envelope, standing records and threshold days for Knox City (USC00414852), Texas, United States, with 31 years of record.
Key Facts for Knox City
Knox City (USC00414852) is a weather station in Texas, United States at 33.42 latitude and -99.82 longitude, 467 m (1,532 ft) above sea level.
The station reports from 1935 to 1965, 31 years of record.
1,464 records set at Knox City still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Knox City set a daily record precipitation of 20.3 mm (0.8 in) on 5 October 1965.
About the Station
Location: Texas, United States, 33.42 latitude, -99.82 longitude.
Elevation: 467 m (1,532 ft).
Period of record: 1935 to 1965, 31 years.
Eligible elements: 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 Knox City. 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 Knox City, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
31.1 C (88.0 F)
-23.9 C (-11.0 F)
n/a
n/a
Feb
32.8 C (91.0 F)
-17.8 C (0.0 F)
n/a
n/a
Mar
38.9 C (102.0 F)
-14.4 C (6.1 F)
n/a
n/a
Apr
38.9 C (102.0 F)
-4.4 C (24.1 F)
n/a
n/a
May
42.2 C (108.0 F)
2.8 C (37.0 F)
n/a
n/a
Jun
43.9 C (111.0 F)
8.3 C (46.9 F)
n/a
n/a
Jul
45.0 C (113.0 F)
12.8 C (55.0 F)
n/a
n/a
Aug
46.7 C (116.1 F)
12.2 C (54.0 F)
n/a
n/a
Sep
42.8 C (109.0 F)
3.3 C (37.9 F)
n/a
n/a
Oct
38.9 C (102.0 F)
-2.2 C (28.0 F)
n/a
n/a
Nov
32.8 C (91.0 F)
-9.4 C (15.1 F)
n/a
n/a
Dec
31.7 C (89.1 F)
-13.9 C (7.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Knox City still stand. 1953 holds the most, with 98.
Standing records at Knox City by the year they were set
Year set
Standing records
1942
51
1943
74
1944
47
1945
55
1946
68
1947
68
1948
75
1949
44
1950
66
1951
68
1952
80
1953
98
1954
71
1955
72
1956
66
1957
58
1958
47
1959
56
1960
64
1961
50
1962
54
1963
61
1964
34
1965
37
Wettest Day of Each Month
Oct: 135.9 mm (5.4 in)
The wettest day on record for each calendar month at Knox City. The most was 135.9 mm (5.4 in) on 18 October 1960.
Record daily precipitation for each month at Knox City
Month
Record daily precipitation (mm)
Date
Jan
26.9 mm (1.1 in)
5 January 1960
Feb
66.0 mm (2.6 in)
15 February 1938
Mar
43.4 mm (1.7 in)
20 March 1955
Apr
65.0 mm (2.6 in)
12 April 1954
May
83.1 mm (3.3 in)
10 May 1950
Jun
114.8 mm (4.5 in)
24 June 1935
Jul
123.7 mm (4.9 in)
18 July 1953
Aug
59.7 mm (2.4 in)
22 August 1951
Sep
102.4 mm (4.0 in)
16 September 1936
Oct
135.9 mm (5.4 in)
18 October 1960
Nov
79.5 mm (3.1 in)
26 November 1962
Dec
30.0 mm (1.2 in)
7 December 1960
Period of Record Coverage
1942 to 1965
Complete yearUnder 90 percent of days
24 years of record at Knox City, 1942 to 1965. 1 years have data for under 90 percent of days and are left out of rankings: 1965.
Cooler than the station meanWarmer than the station mean
One stripe for each of 21 complete years at Knox City, 1943 to 1964. Blue stripes are years cooler than the station's own mean of 18.4 C (65.0 F); red stripes are warmer. The coolest year was 1947, at 16.9 C (62.5 F), and the warmest was 1954, at 19.9 C (67.7 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Knox City as warming stripes, 1943 to 1964
Year
Annual mean temperature
Difference from the station mean
1943
18.4 C
+0.01 C
1944
18.1 C
-0.31 C
1945
18.1 C
-0.25 C
1946
18.3 C
-0.03 C
1947
16.9 C
-1.42 C
1948
17.6 C
-0.74 C
1949
17.6 C
-0.77 C
1951
18.6 C
+0.19 C
1952
19.2 C
+0.85 C
1953
19.2 C
+0.87 C
1954
19.9 C
+1.49 C
1955
18.9 C
+0.52 C
1956
19.6 C
+1.19 C
1957
17.9 C
-0.50 C
1958
17.7 C
-0.67 C
1959
18.0 C
-0.33 C
1960
17.9 C
-0.42 C
1961
17.5 C
-0.83 C
1962
18.6 C
+0.21 C
1963
19.1 C
+0.69 C
1964
18.6 C
+0.24 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
1935 to 1965
Yearly extremes at Knox City: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
46.7 C (116.1 F)
1943
42.8 C (109.0 F)
24
Coldest night (TNn)
-23.9 C (-11.0 F)
1947
-11.7 C (10.9 F)
24
Wettest day (Rx1day)
135.9 mm (5.4 in)
1960
62.5 mm (2.5 in)
31
Wettest five days (Rx5day)
210.8 mm (8.3 in)
1936
89.9 mm (3.5 in)
31
Longest dry spell (CDD)
70 days
1943
41 days
31
Hottest day (TXx)
The hottest day of the year at Knox City, 1935 to 1965. The record is 46.7 C (116.1 F) in 1943, marked on the chart; the median year is 42.8 C (109.0 F).
Hottest day (TXx) at Knox City by year
Year
Hottest day (TXx)
1935
n/a
1936
n/a
1937
n/a
1938
n/a
1939
n/a
1940
n/a
1941
n/a
1942
42.8 C (109.0 F)
1943
46.7 C (116.1 F)
1944
43.9 C (111.0 F)
1945
43.3 C (109.9 F)
1946
42.8 C (109.0 F)
1947
43.9 C (111.0 F)
1948
42.2 C (108.0 F)
1949
40.6 C (105.1 F)
1950
39.4 C (102.9 F)
1951
42.2 C (108.0 F)
1952
44.4 C (111.9 F)
1953
43.9 C (111.0 F)
1954
45.0 C (113.0 F)
1955
43.3 C (109.9 F)
1956
43.3 C (109.9 F)
1957
42.2 C (108.0 F)
1958
42.2 C (108.0 F)
1959
42.8 C (109.0 F)
1960
43.9 C (111.0 F)
1961
39.4 C (102.9 F)
1962
42.8 C (109.0 F)
1963
41.1 C (106.0 F)
1964
44.4 C (111.9 F)
1965
40.6 C (105.1 F)
Coldest night (TNn)
The coldest night of the year at Knox City, 1935 to 1965. The record is -23.9 C (-11.0 F) in 1947, marked on the chart; the median year is -11.7 C (10.9 F).
Coldest night (TNn) at Knox City by year
Year
Coldest night (TNn)
1935
n/a
1936
n/a
1937
n/a
1938
n/a
1939
n/a
1940
n/a
1941
n/a
1942
-10.6 C (12.9 F)
1943
-16.7 C (1.9 F)
1944
-10.6 C (12.9 F)
1945
-11.7 C (10.9 F)
1946
-9.4 C (15.1 F)
1947
-23.9 C (-11.0 F)
1948
-14.4 C (6.1 F)
1949
-10.0 C (14.0 F)
1950
-13.9 C (7.0 F)
1951
-17.8 C (0.0 F)
1952
-6.7 C (19.9 F)
1953
-11.1 C (12.0 F)
1954
-13.9 C (7.0 F)
1955
-8.9 C (16.0 F)
1956
-8.3 C (17.1 F)
1957
-10.0 C (14.0 F)
1958
-10.6 C (12.9 F)
1959
-16.7 C (1.9 F)
1960
-16.1 C (3.0 F)
1961
-11.7 C (10.9 F)
1962
-16.1 C (3.0 F)
1963
-16.1 C (3.0 F)
1964
-12.8 C (9.0 F)
1965
-10.6 C (12.9 F)
Wettest day (Rx1day)
The wettest day of the year at Knox City, 1935 to 1965. The record is 135.9 mm (5.4 in) in 1960, marked on the chart; the median year is 62.5 mm (2.5 in).
Wettest day (Rx1day) at Knox City by year
Year
Wettest day (Rx1day)
1935
114.8 mm (4.5 in)
1936
102.4 mm (4.0 in)
1937
40.6 mm (1.6 in)
1938
66.0 mm (2.6 in)
1939
71.9 mm (2.8 in)
1940
40.9 mm (1.6 in)
1941
62.5 mm (2.5 in)
1942
60.5 mm (2.4 in)
1943
38.1 mm (1.5 in)
1944
76.5 mm (3.0 in)
1945
49.5 mm (1.9 in)
1946
42.7 mm (1.7 in)
1947
55.6 mm (2.2 in)
1948
51.8 mm (2.0 in)
1949
55.6 mm (2.2 in)
1950
83.1 mm (3.3 in)
1951
74.4 mm (2.9 in)
1952
31.8 mm (1.3 in)
1953
123.7 mm (4.9 in)
1954
82.0 mm (3.2 in)
1955
94.0 mm (3.7 in)
1956
30.2 mm (1.2 in)
1957
56.9 mm (2.2 in)
1958
75.9 mm (3.0 in)
1959
108.5 mm (4.3 in)
1960
135.9 mm (5.4 in)
1961
46.7 mm (1.8 in)
1962
79.5 mm (3.1 in)
1963
50.8 mm (2.0 in)
1964
90.2 mm (3.6 in)
1965
54.4 mm (2.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Knox City, 1935 to 1965. The record is 210.8 mm (8.3 in) in 1936, marked on the chart; the median year is 89.9 mm (3.5 in).
Wettest five days (Rx5day) at Knox City by year
Year
Wettest five days (Rx5day)
1935
115.3 mm (4.5 in)
1936
210.8 mm (8.3 in)
1937
58.2 mm (2.3 in)
1938
112.2 mm (4.4 in)
1939
76.7 mm (3.0 in)
1940
76.2 mm (3.0 in)
1941
89.1 mm (3.5 in)
1942
89.9 mm (3.5 in)
1943
49.8 mm (2.0 in)
1944
107.5 mm (4.2 in)
1945
50.8 mm (2.0 in)
1946
58.4 mm (2.3 in)
1947
71.9 mm (2.8 in)
1948
78.8 mm (3.1 in)
1949
114.8 mm (4.5 in)
1950
124.5 mm (4.9 in)
1951
76.4 mm (3.0 in)
1952
45.0 mm (1.8 in)
1953
143.6 mm (5.7 in)
1954
92.6 mm (3.6 in)
1955
112.8 mm (4.4 in)
1956
48.6 mm (1.9 in)
1957
98.3 mm (3.9 in)
1958
75.9 mm (3.0 in)
1959
176.3 mm (6.9 in)
1960
204.3 mm (8.0 in)
1961
72.9 mm (2.9 in)
1962
163.1 mm (6.4 in)
1963
92.2 mm (3.6 in)
1964
118.0 mm (4.6 in)
1965
68.1 mm (2.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Knox City, 1935 to 1965. The record is 70 days in 1943, marked on the chart; the median year is 41 days.
Longest dry spell (CDD) at Knox City by year
Year
Longest dry spell (CDD)
1935
28 days
1936
58 days
1937
30 days
1938
43 days
1939
46 days
1940
46 days
1941
24 days
1942
41 days
1943
70 days
1944
33 days
1945
29 days
1946
25 days
1947
31 days
1948
60 days
1949
44 days
1950
69 days
1951
35 days
1952
47 days
1953
42 days
1954
67 days
1955
55 days
1956
41 days
1957
34 days
1958
30 days
1959
45 days
1960
40 days
1961
34 days
1962
25 days
1963
41 days
1964
45 days
1965
35 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
21 years with a frost
Across 21 years with a frost, the median last spring frost at Knox City falls on 30 March and the median first autumn frost on 9 November, which leaves a median of 226 days between them.
Frost dates and growing season at Knox City
Measure
Median, all years
Earliest period
Recent period (1943 to 1964)
Recent against earliest
Fitted trend
Last spring frost
30 March
n/a
30 March
n/a
n/a
First autumn frost
9 November
n/a
9 November
n/a
n/a
Growing days
226 days
n/a
226 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.
Download the Data
Data for Knox City standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Knox City 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.