Record envelope, standing records and threshold days for Mc Lean (USC00415770), Texas, United States, with 102 years of record.
Key Facts for Mc Lean
Mc Lean (USC00415770) is a weather station in Texas, United States at 35.24 latitude and -100.59 longitude, 802 m (2,632 ft) above sea level.
The station reports from 1907 to 2008, 102 years of record.
1,464 records set at Mc Lean still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Mc Lean set a daily record high maximum temperature of 22.2 C (72.0 F) on 31 December 2008.
About the Station
Location: Texas, United States, 35.24 latitude, -100.59 longitude.
Elevation: 802 m (2,632 ft).
Period of record: 1907 to 2008, 102 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 Mc Lean. 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 Mc Lean, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
28.3 C (82.9 F)
-21.7 C (-7.1 F)
n/a
n/a
Feb
30.6 C (87.1 F)
-20.6 C (-5.1 F)
n/a
n/a
Mar
36.7 C (98.1 F)
-15.6 C (3.9 F)
n/a
n/a
Apr
37.2 C (99.0 F)
-6.7 C (19.9 F)
n/a
n/a
May
40.6 C (105.1 F)
-3.3 C (26.1 F)
n/a
n/a
Jun
43.3 C (109.9 F)
5.6 C (42.1 F)
n/a
n/a
Jul
43.9 C (111.0 F)
11.1 C (52.0 F)
n/a
n/a
Aug
41.1 C (106.0 F)
10.6 C (51.1 F)
n/a
n/a
Sep
40.6 C (105.1 F)
-1.1 C (30.0 F)
n/a
n/a
Oct
38.3 C (100.9 F)
-10.0 C (14.0 F)
n/a
n/a
Nov
31.1 C (88.0 F)
-13.9 C (7.0 F)
n/a
n/a
Dec
26.7 C (80.1 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 Mc Lean still stand. 1980 holds the most, with 56.
Standing records at Mc Lean by the year they were set
Year set
Standing records
1907
42
1908
30
1909
13
1962
23
1963
47
1964
36
1965
40
1966
37
1967
39
1968
22
1969
35
1970
48
1971
37
1972
37
1973
24
1974
33
1975
24
1976
27
1977
14
1978
51
1979
25
1980
56
1981
27
1982
19
1983
50
1984
29
1985
31
1986
33
1987
19
1988
16
1989
46
1990
32
1991
22
1992
19
1993
17
1994
16
1995
31
1996
47
1997
24
1998
37
1999
16
2000
48
2001
20
2002
11
2003
31
2004
9
2005
20
2006
19
2007
16
2008
19
All-Time Record Progression
2 new records
2 all-time records were set at Mc Lean between 22 December 1990 and 3 April 1997. Each dot is a new record.
When Mc Lean set new all-time records
Date
Kind
Detail
1990-12-22
Record low maximum temperature
Record low maximum temperature -16.1 C (3.0 F)
1997-04-03
Record daily precipitation
Record daily precipitation 193.0 mm (7.6 in)
Wettest Day of Each Month
Apr: 193.0 mm (7.6 in)
The wettest day on record for each calendar month at Mc Lean. The most was 193.0 mm (7.6 in) on 3 April 1997.
Record daily precipitation for each month at Mc Lean
Month
Record daily precipitation (mm)
Date
Jan
50.8 mm (2.0 in)
29 January 1999
Feb
57.9 mm (2.3 in)
22 February 1985
Mar
88.9 mm (3.5 in)
10 March 1974
Apr
193.0 mm (7.6 in)
3 April 1997
May
101.6 mm (4.0 in)
21 May 1977
Jun
124.5 mm (4.9 in)
3 June 1995
Jul
112.3 mm (4.4 in)
4 July 2002
Aug
78.7 mm (3.1 in)
2 August 2007
Sep
136.4 mm (5.4 in)
11 September 2003
Oct
94.0 mm (3.7 in)
15 October 2008
Nov
81.3 mm (3.2 in)
4 November 1986
Dec
59.7 mm (2.4 in)
29 December 2006
Period of Record Coverage
1907 to 2008
Complete yearUnder 90 percent of days
50 years of record at Mc Lean, 1907 to 2008. 14 years have data for under 90 percent of days and are left out of rankings: 1909, 1962, 1971, 1973, 1974, 1975, 1976, 1978 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 33 complete years at Mc Lean, 1908 to 2007. Blue stripes are years cooler than the station's own mean of 15.2 C (59.3 F); red stripes are warmer. The coolest year was 1968, at 14.0 C (57.2 F), and the warmest was 2006, at 16.5 C (61.6 F). The strongest colour marks a difference of 1.3 C (2.3 F).
Annual mean temperature at Mc Lean as warming stripes, 1908 to 2007
Year
Annual mean temperature
Difference from the station mean
1908
14.6 C
-0.62 C
1963
16.3 C
+1.14 C
1964
15.7 C
+0.53 C
1965
15.9 C
+0.76 C
1966
14.4 C
-0.83 C
1967
15.1 C
-0.06 C
1968
14.0 C
-1.17 C
1969
14.4 C
-0.79 C
1970
14.5 C
-0.69 C
1972
14.6 C
-0.60 C
1980
16.1 C
+0.92 C
1982
14.9 C
-0.24 C
1983
14.6 C
-0.62 C
1984
15.3 C
+0.11 C
1985
14.9 C
-0.31 C
1986
16.0 C
+0.79 C
1987
14.8 C
-0.37 C
1988
15.0 C
-0.23 C
1989
14.6 C
-0.57 C
1990
15.6 C
+0.46 C
1991
15.1 C
-0.05 C
1992
15.0 C
-0.18 C
1993
14.3 C
-0.88 C
1994
15.5 C
+0.31 C
1995
15.1 C
-0.12 C
1996
15.2 C
+0.01 C
1998
16.0 C
+0.80 C
2000
15.5 C
+0.31 C
2001
15.8 C
+0.65 C
2003
15.7 C
+0.47 C
2005
15.5 C
+0.30 C
2006
16.5 C
+1.29 C
2007
14.6 C
-0.63 C
The fitted trend in annual mean temperature here over 1908 to 2007 is 0.09 C (-0.03 to 0.21) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.17 F (-0.05 to 0.38) per decade. The slope is a straight line fitted to 33 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Mc Lean
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.09 C (-0.03 to 0.21) per decade
0.17 F (-0.05 to 0.38) per decade
1908 to 2007
33
Not clearly different from zero
Mean daily maximum
0.1 C (-0.1 to 0.2) per decade
0.1 F (-0.2 to 0.4) per decade
1908 to 2007
33
Not clearly different from zero
Mean daily minimum
0.11 C (0.02 to 0.20) per decade
0.19 F (0.03 to 0.36) per decade
1908 to 2007
33
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
1907 to 2008
Yearly extremes at Mc Lean: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
43.9 C (111.0 F)
1980
39.2 C (102.5 F)
50
Coldest night (TNn)
-22.2 C (-8.0 F)
1989
-16.7 C (1.9 F)
50
Wettest day (Rx1day)
193.0 mm (7.6 in)
1997
67.3 mm (2.6 in)
54
Wettest five days (Rx5day)
233.6 mm (9.2 in)
1997
99.7 mm (3.9 in)
54
Longest dry spell (CDD)
111 days
1996
42 days
54
Hottest day (TXx)
The hottest day of the year at Mc Lean, 1907 to 2008. The record is 43.9 C (111.0 F) in 1980, marked on the chart; the median year is 39.2 C (102.5 F).
Hottest day (TXx) at Mc Lean by year
Year
Hottest day (TXx)
1907
36.7 C (98.1 F)
1908
37.2 C (99.0 F)
1909
37.2 C (99.0 F)
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1962
40.0 C (104.0 F)
1963
39.4 C (102.9 F)
1964
41.1 C (106.0 F)
1965
39.4 C (102.9 F)
1966
39.4 C (102.9 F)
1967
38.9 C (102.0 F)
1968
38.3 C (100.9 F)
1969
40.0 C (104.0 F)
1970
40.0 C (104.0 F)
1971
40.0 C (104.0 F)
1972
37.8 C (100.0 F)
1973
39.4 C (102.9 F)
1974
37.8 C (100.0 F)
1975
36.1 C (97.0 F)
1976
37.8 C (100.0 F)
1977
38.9 C (102.0 F)
1978
40.6 C (105.1 F)
1979
37.2 C (99.0 F)
1980
43.9 C (111.0 F)
1981
42.2 C (108.0 F)
1982
39.4 C (102.9 F)
1983
40.6 C (105.1 F)
1984
40.6 C (105.1 F)
1985
39.4 C (102.9 F)
1986
40.0 C (104.0 F)
1987
35.6 C (96.1 F)
1988
39.4 C (102.9 F)
1989
38.3 C (100.9 F)
1990
38.3 C (100.9 F)
1991
35.6 C (96.1 F)
1992
36.7 C (98.1 F)
1993
37.2 C (99.0 F)
1994
42.2 C (108.0 F)
1995
40.0 C (104.0 F)
1996
38.9 C (102.0 F)
1997
37.2 C (99.0 F)
1998
41.7 C (107.1 F)
1999
38.9 C (102.0 F)
2000
40.6 C (105.1 F)
2001
40.0 C (104.0 F)
2002
35.6 C (96.1 F)
2003
40.0 C (104.0 F)
2004
36.1 C (97.0 F)
2005
36.7 C (98.1 F)
2006
38.3 C (100.9 F)
2007
36.7 C (98.1 F)
2008
40.6 C (105.1 F)
Coldest night (TNn)
The coldest night of the year at Mc Lean, 1907 to 2008. The record is -22.2 C (-8.0 F) in 1989, marked on the chart; the median year is -16.7 C (1.9 F).
Coldest night (TNn) at Mc Lean by year
Year
Coldest night (TNn)
1907
-13.9 C (7.0 F)
1908
-15.0 C (5.0 F)
1909
-18.9 C (-2.0 F)
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1962
-11.7 C (10.9 F)
1963
-21.7 C (-7.1 F)
1964
-16.7 C (1.9 F)
1965
-16.7 C (1.9 F)
1966
-19.4 C (-2.9 F)
1967
-12.2 C (10.0 F)
1968
-16.7 C (1.9 F)
1969
-15.6 C (3.9 F)
1970
-15.0 C (5.0 F)
1971
-16.1 C (3.0 F)
1972
-17.2 C (1.0 F)
1973
-17.8 C (0.0 F)
1974
-16.7 C (1.9 F)
1975
-14.4 C (6.1 F)
1976
-16.7 C (1.9 F)
1977
-18.9 C (-2.0 F)
1978
-16.1 C (3.0 F)
1979
-15.6 C (3.9 F)
1980
-15.6 C (3.9 F)
1981
-18.3 C (-0.9 F)
1982
-17.8 C (0.0 F)
1983
-21.7 C (-7.1 F)
1984
-20.0 C (-4.0 F)
1985
-18.9 C (-2.0 F)
1986
-17.2 C (1.0 F)
1987
-14.4 C (6.1 F)
1988
-17.8 C (0.0 F)
1989
-22.2 C (-8.0 F)
1990
-21.1 C (-6.0 F)
1991
-12.8 C (9.0 F)
1992
-10.6 C (12.9 F)
1993
-13.9 C (7.0 F)
1994
-17.8 C (0.0 F)
1995
-13.9 C (7.0 F)
1996
-20.0 C (-4.0 F)
1997
-16.1 C (3.0 F)
1998
-17.8 C (0.0 F)
1999
-11.7 C (10.9 F)
2000
-13.3 C (8.1 F)
2001
-10.0 C (14.0 F)
2002
-15.0 C (5.0 F)
2003
-16.1 C (3.0 F)
2004
-18.3 C (-0.9 F)
2005
-19.4 C (-2.9 F)
2006
-13.3 C (8.1 F)
2007
-17.2 C (1.0 F)
2008
-14.4 C (6.1 F)
Wettest day (Rx1day)
The wettest day of the year at Mc Lean, 1907 to 2008. The record is 193.0 mm (7.6 in) in 1997, marked on the chart; the median year is 67.3 mm (2.6 in).
Wettest day (Rx1day) at Mc Lean by year
Year
Wettest day (Rx1day)
1907
60.2 mm (2.4 in)
1908
46.0 mm (1.8 in)
1909
32.5 mm (1.3 in)
1948
34.3 mm (1.4 in)
1949
36.6 mm (1.4 in)
1950
93.0 mm (3.7 in)
1951
85.9 mm (3.4 in)
1962
41.1 mm (1.6 in)
1963
57.2 mm (2.3 in)
1964
55.6 mm (2.2 in)
1965
72.4 mm (2.9 in)
1966
67.3 mm (2.6 in)
1967
46.7 mm (1.8 in)
1968
96.5 mm (3.8 in)
1969
62.2 mm (2.4 in)
1970
62.2 mm (2.4 in)
1971
33.5 mm (1.3 in)
1972
49.8 mm (2.0 in)
1973
50.8 mm (2.0 in)
1974
88.9 mm (3.5 in)
1975
66.0 mm (2.6 in)
1976
51.3 mm (2.0 in)
1977
101.6 mm (4.0 in)
1978
67.3 mm (2.6 in)
1979
101.6 mm (4.0 in)
1980
53.3 mm (2.1 in)
1981
129.5 mm (5.1 in)
1982
72.4 mm (2.9 in)
1983
41.9 mm (1.6 in)
1984
36.1 mm (1.4 in)
1985
71.1 mm (2.8 in)
1986
81.3 mm (3.2 in)
1987
59.7 mm (2.4 in)
1988
44.5 mm (1.8 in)
1989
85.1 mm (3.4 in)
1990
73.7 mm (2.9 in)
1991
49.5 mm (1.9 in)
1992
58.4 mm (2.3 in)
1993
91.4 mm (3.6 in)
1994
34.3 mm (1.4 in)
1995
124.5 mm (4.9 in)
1996
80.0 mm (3.1 in)
1997
193.0 mm (7.6 in)
1998
81.3 mm (3.2 in)
1999
50.8 mm (2.0 in)
2000
86.4 mm (3.4 in)
2001
91.4 mm (3.6 in)
2002
112.3 mm (4.4 in)
2003
136.4 mm (5.4 in)
2004
91.4 mm (3.6 in)
2005
80.0 mm (3.1 in)
2006
59.7 mm (2.4 in)
2007
78.7 mm (3.1 in)
2008
94.0 mm (3.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at Mc Lean, 1907 to 2008. The record is 233.6 mm (9.2 in) in 1997, marked on the chart; the median year is 99.7 mm (3.9 in).
Wettest five days (Rx5day) at Mc Lean by year
Year
Wettest five days (Rx5day)
1907
77.1 mm (3.0 in)
1908
93.0 mm (3.7 in)
1909
58.7 mm (2.3 in)
1948
52.1 mm (2.1 in)
1949
69.4 mm (2.7 in)
1950
103.2 mm (4.1 in)
1951
130.1 mm (5.1 in)
1962
57.6 mm (2.3 in)
1963
90.1 mm (3.5 in)
1964
129.5 mm (5.1 in)
1965
132.3 mm (5.2 in)
1966
115.6 mm (4.6 in)
1967
68.1 mm (2.7 in)
1968
102.3 mm (4.0 in)
1969
133.3 mm (5.2 in)
1970
66.8 mm (2.6 in)
1971
63.5 mm (2.5 in)
1972
74.4 mm (2.9 in)
1973
58.0 mm (2.3 in)
1974
88.9 mm (3.5 in)
1975
96.5 mm (3.8 in)
1976
77.7 mm (3.1 in)
1977
152.9 mm (6.0 in)
1978
113.3 mm (4.5 in)
1979
101.6 mm (4.0 in)
1980
53.3 mm (2.1 in)
1981
132.0 mm (5.2 in)
1982
92.2 mm (3.6 in)
1983
89.9 mm (3.5 in)
1984
57.1 mm (2.2 in)
1985
118.6 mm (4.7 in)
1986
129.5 mm (5.1 in)
1987
125.3 mm (4.9 in)
1988
55.9 mm (2.2 in)
1989
118.6 mm (4.7 in)
1990
99.1 mm (3.9 in)
1991
113.9 mm (4.5 in)
1992
71.1 mm (2.8 in)
1993
94.4 mm (3.7 in)
1994
56.2 mm (2.2 in)
1995
158.8 mm (6.3 in)
1996
156.2 mm (6.1 in)
1997
233.6 mm (9.2 in)
1998
111.8 mm (4.4 in)
1999
72.4 mm (2.9 in)
2000
120.7 mm (4.8 in)
2001
134.6 mm (5.3 in)
2002
136.2 mm (5.4 in)
2003
136.4 mm (5.4 in)
2004
100.3 mm (3.9 in)
2005
158.8 mm (6.3 in)
2006
91.0 mm (3.6 in)
2007
99.1 mm (3.9 in)
2008
152.4 mm (6.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Mc Lean, 1907 to 2008. The record is 111 days in 1996, marked on the chart; the median year is 42 days.
Longest dry spell (CDD) at Mc Lean by year
Year
Longest dry spell (CDD)
1907
57 days
1908
44 days
1909
56 days
1948
41 days
1949
38 days
1950
97 days
1951
20 days
1962
28 days
1963
41 days
1964
51 days
1965
52 days
1966
67 days
1967
78 days
1968
35 days
1969
43 days
1970
49 days
1971
42 days
1972
74 days
1973
40 days
1974
51 days
1975
35 days
1976
63 days
1977
52 days
1978
44 days
1979
51 days
1980
34 days
1981
38 days
1982
26 days
1983
36 days
1984
24 days
1985
27 days
1986
37 days
1987
30 days
1988
29 days
1989
61 days
1990
37 days
1991
59 days
1992
71 days
1993
25 days
1994
32 days
1995
46 days
1996
111 days
1997
35 days
1998
33 days
1999
66 days
2000
66 days
2001
51 days
2002
18 days
2003
36 days
2004
18 days
2005
37 days
2006
35 days
2007
42 days
2008
77 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
33 years with a frost
Across 33 years with a frost, the median last spring frost at Mc Lean falls on 6 April and the median first autumn frost on 29 October, which leaves a median of 204 days between them.
Fitted over all years, the growing season changes by -2.8 days per decade at this station.
Frost dates and growing season at Mc Lean
Measure
Median, all years
Earliest period
Recent period (1965 to 2007)
Recent against earliest
Fitted trend
Last spring frost
6 April
n/a
6 April
n/a
+2.7 days per decade
First autumn frost
29 October
n/a
28 October
n/a
-0.1 days per decade
Growing days
204 days
n/a
201 days
n/a
-2.8 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
46 years, 1907 to 2007
A day with at least 65.3 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 179.3 mm (7.1 in) of rain is expected about once in 100 years.
Rainfall return levels at Mc Lean: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
65.3 mm (2.6 in)
5 years
90.6 mm (3.6 in)
10 years
109.3 mm (4.3 in)
25 years
135.3 mm (5.3 in)
50 years
156.5 mm (6.2 in)
Longer than the 46 years of record
100 years
179.3 mm (7.1 in)
Longer than the 46 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, 46 years of values from 1907 to 2007.
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: 193.0 mm (7.6 in) in 1997; 136.4 mm (5.4 in) in 2003; 129.5 mm (5.1 in) in 1981.
Download the Data
Data for Mc Lean standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mc Lean 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.