Record envelope, standing records and threshold days for Penwell (USC00416932), Texas, United States, with 59 years of record.
Key Facts for Penwell
Penwell (USC00416932) is a weather station in Texas, United States at 31.74 latitude and -102.59 longitude, 894 m (2,933 ft) above sea level.
The station reports from 1955 to 2013, 59 years of record.
1,464 records set at Penwell still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Penwell set a daily record precipitation of 26.9 mm (1.1 in) on 20 September 2013.
About the Station
Location: Texas, United States, 31.74 latitude, -102.59 longitude.
Elevation: 894 m (2,933 ft).
Period of record: 1955 to 2013, 59 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 Penwell. 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 Penwell, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
32.2 C (90.0 F)
-17.8 C (0.0 F)
n/a
n/a
Feb
32.2 C (90.0 F)
-24.4 C (-11.9 F)
n/a
n/a
Mar
35.6 C (96.1 F)
-13.3 C (8.1 F)
n/a
n/a
Apr
41.1 C (106.0 F)
-5.0 C (23.0 F)
n/a
n/a
May
43.3 C (109.9 F)
-2.2 C (28.0 F)
n/a
n/a
Jun
46.7 C (116.1 F)
7.8 C (46.0 F)
n/a
n/a
Jul
43.9 C (111.0 F)
13.3 C (55.9 F)
n/a
n/a
Aug
42.8 C (109.0 F)
13.9 C (57.0 F)
n/a
n/a
Sep
40.6 C (105.1 F)
3.3 C (37.9 F)
n/a
n/a
Oct
38.9 C (102.0 F)
-5.6 C (21.9 F)
n/a
n/a
Nov
32.8 C (91.0 F)
-13.3 C (8.1 F)
n/a
n/a
Dec
28.3 C (82.9 F)
-17.2 C (1.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Penwell still stand. 2011 holds the most, with 75.
Standing records at Penwell by the year they were set
Year set
Standing records
1963
3
1964
26
1965
29
1966
33
1967
28
1968
17
1969
24
1970
43
1971
28
1972
32
1973
30
1974
17
1975
27
1976
41
1977
30
1978
20
1979
27
1980
37
1981
31
1982
32
1983
27
1984
21
1985
41
1986
32
1987
26
1988
22
1989
52
1990
35
1991
17
1992
34
1993
18
1994
20
1995
31
1996
42
1997
27
1998
30
1999
22
2000
46
2001
30
2002
25
2003
19
2004
23
2005
20
2006
17
2007
19
2008
20
2009
21
2010
18
2011
75
2012
57
2013
22
All-Time Record Progression
2 new records
2 all-time records were set at Penwell between 12 December 1998 and 3 February 2011. Each dot is a new record.
When Penwell set new all-time records
Date
Kind
Detail
1998-12-12
Record snow depth
Record snow depth 15.2 cm (6.0 in)
2011-02-03
Record low maximum temperature
Record low maximum temperature -10.0 C (14.0 F)
Wettest Day of Each Month
Apr: 115.1 mm (4.5 in)
The wettest day on record for each calendar month at Penwell. The most was 115.1 mm (4.5 in) on 12 April 1969.
Record daily precipitation for each month at Penwell
Month
Record daily precipitation (mm)
Date
Jan
50.8 mm (2.0 in)
19 January 2007
Feb
45.2 mm (1.8 in)
20 February 1997
Mar
34.3 mm (1.4 in)
20 March 1968
Apr
115.1 mm (4.5 in)
12 April 1969
May
75.4 mm (3.0 in)
26 May 1987
Jun
53.3 mm (2.1 in)
26 June 1996
Jul
51.8 mm (2.0 in)
21 July 1975
Aug
76.2 mm (3.0 in)
25 August 1993
Sep
99.1 mm (3.9 in)
12 September 1975
Oct
63.5 mm (2.5 in)
6 October 2008
Nov
86.4 mm (3.4 in)
5 November 1983
Dec
35.1 mm (1.4 in)
22 December 1986
Period of Record Coverage
1963 to 2013
Complete yearUnder 90 percent of days
51 years of record at Penwell, 1963 to 2013. 21 years have data for under 90 percent of days and are left out of rankings: 1963, 1965, 1966, 1967, 1968, 1969, 1971, 1972 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 39 complete years at Penwell, 1964 to 2012. Blue stripes are years cooler than the station's own mean of 17.9 C (64.2 F); red stripes are warmer. The coolest year was 1976, at 16.5 C (61.7 F), and the warmest was 2012, at 20.0 C (67.9 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Penwell as warming stripes, 1964 to 2012
Year
Annual mean temperature
Difference from the station mean
1964
18.3 C
+0.44 C
1970
18.2 C
+0.28 C
1972
17.5 C
-0.36 C
1973
16.7 C
-1.20 C
1974
17.1 C
-0.76 C
1975
16.7 C
-1.22 C
1976
16.5 C
-1.36 C
1977
18.9 C
+0.98 C
1978
17.7 C
-0.20 C
1979
17.1 C
-0.80 C
1980
17.6 C
-0.26 C
1981
17.8 C
-0.07 C
1982
18.0 C
+0.08 C
1983
17.8 C
-0.08 C
1984
17.0 C
-0.88 C
1985
17.6 C
-0.30 C
1986
17.9 C
+0.02 C
1987
16.5 C
-1.34 C
1988
17.3 C
-0.60 C
1989
17.6 C
-0.24 C
1990
17.8 C
-0.10 C
1991
17.4 C
-0.49 C
1992
17.1 C
-0.75 C
1993
17.4 C
-0.49 C
1994
18.4 C
+0.51 C
1995
18.0 C
+0.17 C
1996
18.1 C
+0.26 C
1997
17.1 C
-0.73 C
1998
19.3 C
+1.46 C
1999
19.2 C
+1.36 C
2000
19.0 C
+1.09 C
2001
18.8 C
+0.90 C
2002
18.2 C
+0.29 C
2003
18.6 C
+0.70 C
2004
17.9 C
-0.01 C
2005
18.0 C
+0.15 C
2010
17.9 C
+0.02 C
2011
19.5 C
+1.62 C
2012
20.0 C
+2.10 C
The annual mean temperature here has risen by 0.4 C (0.2 to 0.6) per decade over 1964 to 2012. In Fahrenheit: 0.7 F (0.3 to 1.0) 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 Penwell
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.4 C (0.2 to 0.6) per decade
0.7 F (0.3 to 1.0) per decade
1964 to 2012
39
Rise
Mean daily maximum
0.4 C (0.2 to 0.6) per decade
0.7 F (0.3 to 1.1) per decade
1964 to 2012
39
Rise
Mean daily minimum
0.3 C (0.1 to 0.5) per decade
0.6 F (0.3 to 1.0) per decade
1964 to 2012
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
1955 to 2013
Yearly extremes at Penwell: 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)
1994
41.1 C (106.0 F)
51
Coldest night (TNn)
-24.4 C (-11.9 F)
1985
-11.7 C (10.9 F)
51
Wettest day (Rx1day)
115.1 mm (4.5 in)
1969
46.7 mm (1.8 in)
59
Wettest five days (Rx5day)
157.7 mm (6.2 in)
1986
57.6 mm (2.3 in)
59
Longest dry spell (CDD)
190 days
2011
61 days
59
Hottest day (TXx)
The hottest day of the year at Penwell, 1955 to 2013. The record is 46.7 C (116.1 F) in 1994, marked on the chart; the median year is 41.1 C (106.0 F).
Hottest day (TXx) at Penwell by year
Year
Hottest day (TXx)
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
36.1 C (97.0 F)
1964
40.6 C (105.1 F)
1965
38.9 C (102.0 F)
1966
40.0 C (104.0 F)
1967
40.6 C (105.1 F)
1968
39.4 C (102.9 F)
1969
42.2 C (108.0 F)
1970
40.0 C (104.0 F)
1971
41.1 C (106.0 F)
1972
41.1 C (106.0 F)
1973
39.4 C (102.9 F)
1974
38.9 C (102.0 F)
1975
40.0 C (104.0 F)
1976
38.9 C (102.0 F)
1977
40.6 C (105.1 F)
1978
41.1 C (106.0 F)
1979
39.4 C (102.9 F)
1980
42.8 C (109.0 F)
1981
41.1 C (106.0 F)
1982
41.1 C (106.0 F)
1983
40.6 C (105.1 F)
1984
40.6 C (105.1 F)
1985
40.6 C (105.1 F)
1986
41.1 C (106.0 F)
1987
38.9 C (102.0 F)
1988
40.6 C (105.1 F)
1989
43.3 C (109.9 F)
1990
42.2 C (108.0 F)
1991
40.6 C (105.1 F)
1992
40.0 C (104.0 F)
1993
39.4 C (102.9 F)
1994
46.7 C (116.1 F)
1995
41.7 C (107.1 F)
1996
42.2 C (108.0 F)
1997
38.9 C (102.0 F)
1998
44.4 C (111.9 F)
1999
43.3 C (109.9 F)
2000
43.3 C (109.9 F)
2001
41.7 C (107.1 F)
2002
41.7 C (107.1 F)
2003
41.7 C (107.1 F)
2004
41.7 C (107.1 F)
2005
40.6 C (105.1 F)
2006
41.1 C (106.0 F)
2007
37.2 C (99.0 F)
2008
41.1 C (106.0 F)
2009
40.6 C (105.1 F)
2010
43.9 C (111.0 F)
2011
46.1 C (115.0 F)
2012
42.8 C (109.0 F)
2013
43.3 C (109.9 F)
Coldest night (TNn)
The coldest night of the year at Penwell, 1955 to 2013. The record is -24.4 C (-11.9 F) in 1985, marked on the chart; the median year is -11.7 C (10.9 F).
Coldest night (TNn) at Penwell by year
Year
Coldest night (TNn)
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
-8.9 C (16.0 F)
1964
-14.4 C (6.1 F)
1965
-9.4 C (15.1 F)
1966
-16.1 C (3.0 F)
1967
-10.0 C (14.0 F)
1968
-11.1 C (12.0 F)
1969
-7.8 C (18.0 F)
1970
-12.2 C (10.0 F)
1971
-13.3 C (8.1 F)
1972
-17.2 C (1.0 F)
1973
-13.3 C (8.1 F)
1974
-10.6 C (12.9 F)
1975
-10.6 C (12.9 F)
1976
-13.3 C (8.1 F)
1977
-14.4 C (6.1 F)
1978
-11.1 C (12.0 F)
1979
-17.8 C (0.0 F)
1980
-13.3 C (8.1 F)
1981
-15.0 C (5.0 F)
1982
-15.0 C (5.0 F)
1983
-14.4 C (6.1 F)
1984
-9.4 C (15.1 F)
1985
-24.4 C (-11.9 F)
1986
-11.7 C (10.9 F)
1987
-12.8 C (9.0 F)
1988
-12.2 C (10.0 F)
1989
-17.2 C (1.0 F)
1990
-13.3 C (8.1 F)
1991
-7.8 C (18.0 F)
1992
-10.0 C (14.0 F)
1993
-12.2 C (10.0 F)
1994
-10.0 C (14.0 F)
1995
-7.2 C (19.0 F)
1996
-12.2 C (10.0 F)
1997
-11.7 C (10.9 F)
1998
-10.0 C (14.0 F)
1999
-7.2 C (19.0 F)
2000
-7.8 C (18.0 F)
2001
-12.2 C (10.0 F)
2002
-10.6 C (12.9 F)
2003
-8.3 C (17.1 F)
2004
-9.4 C (15.1 F)
2005
-13.3 C (8.1 F)
2006
-9.4 C (15.1 F)
2007
-8.3 C (17.1 F)
2008
-7.8 C (18.0 F)
2009
-12.2 C (10.0 F)
2010
-11.1 C (12.0 F)
2011
-16.1 C (3.0 F)
2012
-7.8 C (18.0 F)
2013
-9.4 C (15.1 F)
Wettest day (Rx1day)
The wettest day of the year at Penwell, 1955 to 2013. The record is 115.1 mm (4.5 in) in 1969, marked on the chart; the median year is 46.7 mm (1.8 in).
Wettest day (Rx1day) at Penwell by year
Year
Wettest day (Rx1day)
1955
14.2 mm (0.6 in)
1956
42.7 mm (1.7 in)
1957
34.5 mm (1.4 in)
1958
48.8 mm (1.9 in)
1959
33.5 mm (1.3 in)
1960
31.8 mm (1.3 in)
1961
29.2 mm (1.1 in)
1962
52.6 mm (2.1 in)
1963
27.2 mm (1.1 in)
1964
49.8 mm (2.0 in)
1965
48.3 mm (1.9 in)
1966
38.1 mm (1.5 in)
1967
38.4 mm (1.5 in)
1968
43.4 mm (1.7 in)
1969
115.1 mm (4.5 in)
1970
27.9 mm (1.1 in)
1971
50.8 mm (2.0 in)
1972
45.7 mm (1.8 in)
1973
42.7 mm (1.7 in)
1974
56.9 mm (2.2 in)
1975
99.1 mm (3.9 in)
1976
41.1 mm (1.6 in)
1977
33.0 mm (1.3 in)
1978
41.9 mm (1.6 in)
1979
33.3 mm (1.3 in)
1980
65.0 mm (2.6 in)
1981
55.4 mm (2.2 in)
1982
55.9 mm (2.2 in)
1983
86.4 mm (3.4 in)
1984
69.6 mm (2.7 in)
1985
29.2 mm (1.1 in)
1986
92.2 mm (3.6 in)
1987
75.4 mm (3.0 in)
1988
67.3 mm (2.6 in)
1989
45.5 mm (1.8 in)
1990
35.3 mm (1.4 in)
1991
53.3 mm (2.1 in)
1992
61.0 mm (2.4 in)
1993
76.2 mm (3.0 in)
1994
31.8 mm (1.3 in)
1995
39.4 mm (1.6 in)
1996
53.3 mm (2.1 in)
1997
57.7 mm (2.3 in)
1998
17.8 mm (0.7 in)
1999
23.4 mm (0.9 in)
2000
50.0 mm (2.0 in)
2001
17.3 mm (0.7 in)
2002
50.8 mm (2.0 in)
2003
69.6 mm (2.7 in)
2004
83.1 mm (3.3 in)
2005
46.7 mm (1.8 in)
2006
27.9 mm (1.1 in)
2007
52.3 mm (2.1 in)
2008
63.5 mm (2.5 in)
2009
50.8 mm (2.0 in)
2010
39.6 mm (1.6 in)
2011
19.1 mm (0.8 in)
2012
53.3 mm (2.1 in)
2013
29.5 mm (1.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Penwell, 1955 to 2013. The record is 157.7 mm (6.2 in) in 1986, marked on the chart; the median year is 57.6 mm (2.3 in).
Wettest five days (Rx5day) at Penwell by year
Year
Wettest five days (Rx5day)
1955
14.2 mm (0.6 in)
1956
42.7 mm (1.7 in)
1957
57.6 mm (2.3 in)
1958
51.1 mm (2.0 in)
1959
58.2 mm (2.3 in)
1960
52.1 mm (2.1 in)
1961
31.5 mm (1.2 in)
1962
97.3 mm (3.8 in)
1963
53.1 mm (2.1 in)
1964
49.8 mm (2.0 in)
1965
60.3 mm (2.4 in)
1966
41.4 mm (1.6 in)
1967
47.1 mm (1.9 in)
1968
50.8 mm (2.0 in)
1969
143.0 mm (5.6 in)
1970
55.3 mm (2.2 in)
1971
76.2 mm (3.0 in)
1972
49.1 mm (1.9 in)
1973
50.8 mm (2.0 in)
1974
87.7 mm (3.5 in)
1975
112.9 mm (4.4 in)
1976
53.8 mm (2.1 in)
1977
33.0 mm (1.3 in)
1978
92.2 mm (3.6 in)
1979
46.5 mm (1.8 in)
1980
95.8 mm (3.8 in)
1981
55.4 mm (2.2 in)
1982
67.6 mm (2.7 in)
1983
90.5 mm (3.6 in)
1984
117.6 mm (4.6 in)
1985
37.6 mm (1.5 in)
1986
157.7 mm (6.2 in)
1987
125.7 mm (4.9 in)
1988
69.8 mm (2.7 in)
1989
68.6 mm (2.7 in)
1990
49.3 mm (1.9 in)
1991
91.6 mm (3.6 in)
1992
143.6 mm (5.7 in)
1993
81.3 mm (3.2 in)
1994
41.2 mm (1.6 in)
1995
69.6 mm (2.7 in)
1996
89.6 mm (3.5 in)
1997
63.3 mm (2.5 in)
1998
20.1 mm (0.8 in)
1999
28.6 mm (1.1 in)
2000
50.6 mm (2.0 in)
2001
22.1 mm (0.9 in)
2002
54.1 mm (2.1 in)
2003
87.4 mm (3.4 in)
2004
148.4 mm (5.8 in)
2005
47.7 mm (1.9 in)
2006
27.9 mm (1.1 in)
2007
88.2 mm (3.5 in)
2008
63.5 mm (2.5 in)
2009
58.2 mm (2.3 in)
2010
62.5 mm (2.5 in)
2011
19.1 mm (0.8 in)
2012
80.0 mm (3.1 in)
2013
31.0 mm (1.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Penwell, 1955 to 2013. The record is 190 days in 2011, marked on the chart; the median year is 61 days.
Longest dry spell (CDD) at Penwell by year
Year
Longest dry spell (CDD)
1955
53 days
1956
61 days
1957
48 days
1958
47 days
1959
33 days
1960
44 days
1961
49 days
1962
42 days
1963
44 days
1964
68 days
1965
42 days
1966
76 days
1967
81 days
1968
33 days
1969
69 days
1970
73 days
1971
104 days
1972
94 days
1973
81 days
1974
48 days
1975
67 days
1976
83 days
1977
61 days
1978
40 days
1979
60 days
1980
65 days
1981
70 days
1982
58 days
1983
60 days
1984
78 days
1985
58 days
1986
70 days
1987
50 days
1988
76 days
1989
61 days
1990
36 days
1991
110 days
1992
59 days
1993
38 days
1994
52 days
1995
48 days
1996
85 days
1997
30 days
1998
62 days
1999
69 days
2000
106 days
2001
51 days
2002
39 days
2003
65 days
2004
77 days
2005
51 days
2006
63 days
2007
27 days
2008
92 days
2009
35 days
2010
96 days
2011
190 days
2012
26 days
2013
147 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 Penwell falls on 31 March and the median first autumn frost on 11 November, which leaves a median of 227 days between them.
Fitted over all years, the growing season changes by +1.8 days per decade at this station.
Frost dates and growing season at Penwell
Measure
Median, all years
Earliest period
Recent period (1979 to 2012)
Recent against earliest
Fitted trend
Last spring frost
31 March
n/a
30 March
n/a
-0.9 days per decade
First autumn frost
11 November
n/a
11 November
n/a
+0.9 days per decade
Growing days
227 days
n/a
229 days
n/a
+1.8 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
51 years, 1956 to 2012
A day with at least 47.2 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 116.6 mm (4.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Penwell: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
47.2 mm (1.9 in)
5 years
65.9 mm (2.6 in)
10 years
78.2 mm (3.1 in)
25 years
93.7 mm (3.7 in)
50 years
105.2 mm (4.1 in)
100 years
116.6 mm (4.6 in)
Longer than the 51 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, 51 years of values from 1956 to 2012.
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: 115.1 mm (4.5 in) in 1969; 99.1 mm (3.9 in) in 1975; 92.2 mm (3.6 in) in 1986.
Download the Data
Data for Penwell standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Penwell 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.