Record envelope, standing records and threshold days for Monahans (USC00415999), Texas, United States, with 51 years of record.
Key Facts for Monahans
Monahans (USC00415999) is a weather station in Texas, United States at 31.54 latitude and -102.91 longitude, 776 m (2,547 ft) above sea level.
The station reports from 1959 to 2009, 51 years of record.
1,464 records set at Monahans still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Monahans set a daily record high maximum temperature of 23.9 C (75.0 F) on 20 December 2008.
About the Station
Location: Texas, United States, 31.54 latitude, -102.91 longitude.
Elevation: 776 m (2,547 ft).
Period of record: 1959 to 2009, 51 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 Monahans. 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 Monahans, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
30.6 C (87.1 F)
-22.8 C (-9.0 F)
n/a
n/a
Feb
32.8 C (91.0 F)
-22.2 C (-8.0 F)
n/a
n/a
Mar
37.8 C (100.0 F)
-11.1 C (12.0 F)
n/a
n/a
Apr
41.1 C (106.0 F)
-3.9 C (25.0 F)
n/a
n/a
May
45.6 C (114.1 F)
1.7 C (35.1 F)
n/a
n/a
Jun
48.9 C (120.0 F)
6.1 C (43.0 F)
n/a
n/a
Jul
46.1 C (115.0 F)
10.0 C (50.0 F)
n/a
n/a
Aug
43.3 C (109.9 F)
10.0 C (50.0 F)
n/a
n/a
Sep
42.2 C (108.0 F)
0.6 C (33.1 F)
n/a
n/a
Oct
40.0 C (104.0 F)
-5.6 C (21.9 F)
n/a
n/a
Nov
33.3 C (91.9 F)
-12.2 C (10.0 F)
n/a
n/a
Dec
30.0 C (86.0 F)
-15.0 C (5.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Monahans still stand. 1970 holds the most, with 88.
Standing records at Monahans by the year they were set
Year set
Standing records
1959
16
1960
24
1961
25
1962
36
1963
30
1964
22
1965
35
1966
28
1967
31
1968
20
1969
24
1970
88
1971
32
1972
28
1973
16
1974
24
1975
23
1976
23
1977
26
1978
34
1979
18
1980
47
1981
23
1982
27
1983
13
1984
16
1985
41
1986
26
1987
31
1988
27
1989
51
1990
41
1991
24
1992
24
1993
28
1994
27
1995
26
1996
44
1997
32
1998
60
1999
31
2000
34
2001
20
2002
32
2003
21
2004
33
2005
24
2006
20
2007
15
2008
23
All-Time Record Progression
4 new records
4 all-time records were set at Monahans between 26 June 1994 and 28 July 2000. Each dot is a new record.
When Monahans set new all-time records
Date
Kind
Detail
1994-06-26
Record high maximum temperature
Record high maximum temperature 45.6 C (114.1 F)
1994-06-27
Record high maximum temperature
Record high maximum temperature 47.8 C (118.0 F)
1994-06-28
Record high maximum temperature
Record high maximum temperature 48.9 C (120.0 F)
2000-07-28
Record high minimum temperature
Record high minimum temperature 26.7 C (80.1 F)
Wettest Day of Each Month
Sep: 111.8 mm (4.4 in)
The wettest day on record for each calendar month at Monahans. The most was 111.8 mm (4.4 in) on 27 September 1980.
Record daily precipitation for each month at Monahans
Month
Record daily precipitation (mm)
Date
Jan
24.1 mm (0.9 in)
28 January 2007
Feb
39.6 mm (1.6 in)
17 February 1965
Mar
31.8 mm (1.3 in)
25 March 2007
Apr
49.8 mm (2.0 in)
12 April 1969
May
71.1 mm (2.8 in)
23 May 1987
Jun
71.6 mm (2.8 in)
3 June 1978
Jul
109.7 mm (4.3 in)
27 July 2005
Aug
78.5 mm (3.1 in)
5 August 2005
Sep
111.8 mm (4.4 in)
27 September 1980
Oct
65.5 mm (2.6 in)
17 October 1985
Nov
43.2 mm (1.7 in)
15 November 2004
Dec
37.6 mm (1.5 in)
21 December 1986
Period of Record Coverage
1959 to 2009
Complete yearUnder 90 percent of days
51 years of record at Monahans, 1959 to 2009. 14 years have data for under 90 percent of days and are left out of rankings: 1959, 1970, 1973, 1978, 1979, 1982, 1983, 1984 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 35 complete years at Monahans, 1960 to 2005. 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 1976, at 17.2 C (62.9 F), and the warmest was 1998, at 19.4 C (66.9 F). The strongest colour marks a difference of 1.2 C (2.2 F).
Annual mean temperature at Monahans as warming stripes, 1960 to 2005
Year
Annual mean temperature
Difference from the station mean
1960
17.9 C
-0.42 C
1961
17.6 C
-0.76 C
1962
18.6 C
+0.20 C
1963
18.6 C
+0.29 C
1964
18.3 C
-0.05 C
1965
18.6 C
+0.27 C
1966
17.8 C
-0.56 C
1967
18.6 C
+0.24 C
1968
17.7 C
-0.62 C
1969
18.5 C
+0.17 C
1971
19.3 C
+0.93 C
1975
17.9 C
-0.50 C
1976
17.2 C
-1.16 C
1977
19.0 C
+0.62 C
1980
18.6 C
+0.25 C
1981
18.6 C
+0.27 C
1985
17.7 C
-0.70 C
1986
18.5 C
+0.17 C
1987
17.6 C
-0.76 C
1988
18.1 C
-0.25 C
1989
18.4 C
+0.06 C
1990
18.7 C
+0.31 C
1991
18.4 C
+0.03 C
1992
18.4 C
+0.03 C
1993
18.6 C
+0.21 C
1994
19.0 C
+0.68 C
1995
18.5 C
+0.10 C
1996
18.5 C
+0.16 C
1997
17.7 C
-0.66 C
1998
19.4 C
+1.04 C
1999
19.4 C
+1.01 C
2002
18.3 C
-0.02 C
2003
18.5 C
+0.17 C
2004
18.0 C
-0.36 C
2005
18.1 C
-0.22 C
The fitted trend in annual mean temperature here over 1960 to 2005 is 0.1 C (-0.1 to 0.2) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.3) per decade. The slope is a straight line fitted to 35 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Monahans
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.1 to 0.2) per decade
0.1 F (-0.1 to 0.3) per decade
1960 to 2005
35
Not clearly different from zero
Mean daily maximum
0.3 C (0.1 to 0.5) per decade
0.5 F (0.1 to 0.9) per decade
1960 to 2005
35
Rise
Mean daily minimum
-0.15 C (-0.32 to 0.02) per decade
-0.26 F (-0.57 to 0.04) per decade
1960 to 2005
35
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
1959 to 2009
Yearly extremes at Monahans: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
48.9 C (120.0 F)
1994
42.2 C (108.0 F)
51
Coldest night (TNn)
-22.8 C (-9.0 F)
1962
-10.6 C (12.9 F)
51
Wettest day (Rx1day)
111.8 mm (4.4 in)
1980
43.9 mm (1.7 in)
51
Wettest five days (Rx5day)
241.0 mm (9.5 in)
1980
63.0 mm (2.5 in)
51
Longest dry spell (CDD)
104 days
1971
56 days
51
Hottest day (TXx)
The hottest day of the year at Monahans, 1959 to 2009. The record is 48.9 C (120.0 F) in 1994, marked on the chart; the median year is 42.2 C (108.0 F).
Hottest day (TXx) at Monahans by year
Year
Hottest day (TXx)
1959
40.6 C (105.1 F)
1960
41.1 C (106.0 F)
1961
38.3 C (100.9 F)
1962
40.0 C (104.0 F)
1963
39.4 C (102.9 F)
1964
41.7 C (107.1 F)
1965
38.9 C (102.0 F)
1966
39.4 C (102.9 F)
1967
39.4 C (102.9 F)
1968
40.6 C (105.1 F)
1969
41.1 C (106.0 F)
1970
40.6 C (105.1 F)
1971
42.2 C (108.0 F)
1972
42.8 C (109.0 F)
1973
37.8 C (100.0 F)
1974
40.6 C (105.1 F)
1975
42.2 C (108.0 F)
1976
40.6 C (105.1 F)
1977
43.3 C (109.9 F)
1978
42.2 C (108.0 F)
1979
41.1 C (106.0 F)
1980
43.3 C (109.9 F)
1981
42.8 C (109.0 F)
1982
39.4 C (102.9 F)
1983
42.2 C (108.0 F)
1984
40.6 C (105.1 F)
1985
42.2 C (108.0 F)
1986
42.8 C (109.0 F)
1987
43.3 C (109.9 F)
1988
42.8 C (109.0 F)
1989
45.0 C (113.0 F)
1990
45.0 C (113.0 F)
1991
44.4 C (111.9 F)
1992
43.3 C (109.9 F)
1993
44.4 C (111.9 F)
1994
48.9 C (120.0 F)
1995
43.9 C (111.0 F)
1996
44.4 C (111.9 F)
1997
42.2 C (108.0 F)
1998
46.1 C (115.0 F)
1999
43.9 C (111.0 F)
2000
45.6 C (114.1 F)
2001
42.2 C (108.0 F)
2002
42.2 C (108.0 F)
2003
42.8 C (109.0 F)
2004
42.2 C (108.0 F)
2005
42.8 C (109.0 F)
2006
42.2 C (108.0 F)
2007
39.4 C (102.9 F)
2008
42.8 C (109.0 F)
2009
25.0 C (77.0 F)
Coldest night (TNn)
The coldest night of the year at Monahans, 1959 to 2009. The record is -22.8 C (-9.0 F) in 1962, marked on the chart; the median year is -10.6 C (12.9 F).
Coldest night (TNn) at Monahans by year
Year
Coldest night (TNn)
1959
-8.3 C (17.1 F)
1960
-11.7 C (10.9 F)
1961
-6.7 C (19.9 F)
1962
-22.8 C (-9.0 F)
1963
-13.3 C (8.1 F)
1964
-14.4 C (6.1 F)
1965
-8.9 C (16.0 F)
1966
-12.2 C (10.0 F)
1967
-12.2 C (10.0 F)
1968
-8.9 C (16.0 F)
1969
-7.2 C (19.0 F)
1970
-11.7 C (10.9 F)
1971
-13.3 C (8.1 F)
1972
-15.6 C (3.9 F)
1973
-8.9 C (16.0 F)
1974
-10.0 C (14.0 F)
1975
-9.4 C (15.1 F)
1976
-12.2 C (10.0 F)
1977
-13.3 C (8.1 F)
1978
-8.9 C (16.0 F)
1979
-9.4 C (15.1 F)
1980
-9.4 C (15.1 F)
1981
-12.2 C (10.0 F)
1982
-12.8 C (9.0 F)
1983
-8.9 C (16.0 F)
1984
-5.0 C (23.0 F)
1985
-22.2 C (-8.0 F)
1986
-13.9 C (7.0 F)
1987
-13.3 C (8.1 F)
1988
-11.7 C (10.9 F)
1989
-15.0 C (5.0 F)
1990
-12.8 C (9.0 F)
1991
-8.3 C (17.1 F)
1992
-10.6 C (12.9 F)
1993
-11.7 C (10.9 F)
1994
-9.4 C (15.1 F)
1995
-8.3 C (17.1 F)
1996
-12.8 C (9.0 F)
1997
-11.1 C (12.0 F)
1998
-8.9 C (16.0 F)
1999
-8.3 C (17.1 F)
2000
-8.9 C (16.0 F)
2001
-11.1 C (12.0 F)
2002
-10.6 C (12.9 F)
2003
-10.6 C (12.9 F)
2004
-7.8 C (18.0 F)
2005
-13.9 C (7.0 F)
2006
-9.4 C (15.1 F)
2007
-8.9 C (16.0 F)
2008
-8.9 C (16.0 F)
2009
-6.1 C (21.0 F)
Wettest day (Rx1day)
The wettest day of the year at Monahans, 1959 to 2009. The record is 111.8 mm (4.4 in) in 1980, marked on the chart; the median year is 43.9 mm (1.7 in).
Wettest day (Rx1day) at Monahans by year
Year
Wettest day (Rx1day)
1959
52.6 mm (2.1 in)
1960
43.9 mm (1.7 in)
1961
31.5 mm (1.2 in)
1962
43.7 mm (1.7 in)
1963
34.8 mm (1.4 in)
1964
25.4 mm (1.0 in)
1965
41.7 mm (1.6 in)
1966
50.0 mm (2.0 in)
1967
30.5 mm (1.2 in)
1968
68.6 mm (2.7 in)
1969
56.6 mm (2.2 in)
1970
22.9 mm (0.9 in)
1971
50.3 mm (2.0 in)
1972
30.0 mm (1.2 in)
1973
30.5 mm (1.2 in)
1974
50.8 mm (2.0 in)
1975
34.3 mm (1.4 in)
1976
17.8 mm (0.7 in)
1977
49.5 mm (1.9 in)
1978
71.6 mm (2.8 in)
1979
33.0 mm (1.3 in)
1980
111.8 mm (4.4 in)
1981
58.9 mm (2.3 in)
1982
43.2 mm (1.7 in)
1983
17.8 mm (0.7 in)
1984
45.7 mm (1.8 in)
1985
65.5 mm (2.6 in)
1986
48.8 mm (1.9 in)
1987
71.1 mm (2.8 in)
1988
88.9 mm (3.5 in)
1989
39.4 mm (1.6 in)
1990
72.4 mm (2.9 in)
1991
71.9 mm (2.8 in)
1992
41.9 mm (1.6 in)
1993
18.3 mm (0.7 in)
1994
63.2 mm (2.5 in)
1995
44.5 mm (1.8 in)
1996
55.1 mm (2.2 in)
1997
32.3 mm (1.3 in)
1998
27.9 mm (1.1 in)
1999
38.1 mm (1.5 in)
2000
34.0 mm (1.3 in)
2001
38.4 mm (1.5 in)
2002
47.0 mm (1.9 in)
2003
37.8 mm (1.5 in)
2004
64.0 mm (2.5 in)
2005
109.7 mm (4.3 in)
2006
31.5 mm (1.2 in)
2007
59.7 mm (2.4 in)
2008
61.5 mm (2.4 in)
2009
0.5 mm (0.02 in)
Wettest five days (Rx5day)
The wettest five days of the year at Monahans, 1959 to 2009. The record is 241.0 mm (9.5 in) in 1980, marked on the chart; the median year is 63.0 mm (2.5 in).
Wettest five days (Rx5day) at Monahans by year
Year
Wettest five days (Rx5day)
1959
53.4 mm (2.1 in)
1960
78.7 mm (3.1 in)
1961
40.9 mm (1.6 in)
1962
56.6 mm (2.2 in)
1963
64.0 mm (2.5 in)
1964
41.1 mm (1.6 in)
1965
54.6 mm (2.1 in)
1966
72.4 mm (2.9 in)
1967
33.0 mm (1.3 in)
1968
90.2 mm (3.6 in)
1969
70.6 mm (2.8 in)
1970
34.1 mm (1.3 in)
1971
50.3 mm (2.0 in)
1972
44.7 mm (1.8 in)
1973
35.6 mm (1.4 in)
1974
147.0 mm (5.8 in)
1975
42.0 mm (1.7 in)
1976
30.0 mm (1.2 in)
1977
74.9 mm (2.9 in)
1978
94.0 mm (3.7 in)
1979
48.0 mm (1.9 in)
1980
241.0 mm (9.5 in)
1981
99.1 mm (3.9 in)
1982
63.3 mm (2.5 in)
1983
28.9 mm (1.1 in)
1984
63.0 mm (2.5 in)
1985
77.4 mm (3.0 in)
1986
77.3 mm (3.0 in)
1987
89.1 mm (3.5 in)
1988
90.2 mm (3.6 in)
1989
60.5 mm (2.4 in)
1990
95.0 mm (3.7 in)
1991
158.5 mm (6.2 in)
1992
96.8 mm (3.8 in)
1993
26.7 mm (1.1 in)
1994
90.7 mm (3.6 in)
1995
72.4 mm (2.9 in)
1996
72.6 mm (2.9 in)
1997
42.2 mm (1.7 in)
1998
43.9 mm (1.7 in)
1999
40.9 mm (1.6 in)
2000
64.3 mm (2.5 in)
2001
40.9 mm (1.6 in)
2002
52.6 mm (2.1 in)
2003
39.9 mm (1.6 in)
2004
97.8 mm (3.9 in)
2005
110.8 mm (4.4 in)
2006
38.2 mm (1.5 in)
2007
79.6 mm (3.1 in)
2008
61.8 mm (2.4 in)
2009
0.5 mm (0.02 in)
Longest dry spell (CDD)
The longest dry spell of the year at Monahans, 1959 to 2009. The record is 104 days in 1971, marked on the chart; the median year is 56 days.
Longest dry spell (CDD) at Monahans by year
Year
Longest dry spell (CDD)
1959
30 days
1960
44 days
1961
58 days
1962
46 days
1963
44 days
1964
63 days
1965
66 days
1966
75 days
1967
97 days
1968
29 days
1969
44 days
1970
58 days
1971
104 days
1972
86 days
1973
56 days
1974
94 days
1975
60 days
1976
47 days
1977
43 days
1978
78 days
1979
88 days
1980
56 days
1981
70 days
1982
55 days
1983
42 days
1984
45 days
1985
60 days
1986
55 days
1987
61 days
1988
56 days
1989
61 days
1990
36 days
1991
45 days
1992
56 days
1993
40 days
1994
33 days
1995
47 days
1996
70 days
1997
29 days
1998
84 days
1999
67 days
2000
83 days
2001
56 days
2002
41 days
2003
49 days
2004
40 days
2005
67 days
2006
48 days
2007
41 days
2008
83 days
2009
31 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
35 years with a frost
Across 35 years with a frost, the median last spring frost at Monahans falls on 26 March and the median first autumn frost on 6 November, which leaves a median of 226 days between them.
Fitted over all years, the growing season changes by -3.2 days per decade at this station.
Frost dates and growing season at Monahans
Measure
Median, all years
Earliest period
Recent period (1965 to 2005)
Recent against earliest
Fitted trend
Last spring frost
26 March
n/a
31 March
n/a
+3.1 days per decade
First autumn frost
6 November
n/a
4 November
n/a
-0.2 days per decade
Growing days
226 days
n/a
224 days
n/a
-3.2 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
42 years, 1960 to 2008
A day with at least 46.2 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 119.9 mm (4.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Monahans: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
46.2 mm (1.8 in)
5 years
65.4 mm (2.6 in)
10 years
78.3 mm (3.1 in)
25 years
94.9 mm (3.7 in)
50 years
107.4 mm (4.2 in)
Longer than the 42 years of record
100 years
119.9 mm (4.7 in)
Longer than the 42 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, 42 years of values from 1960 to 2008.
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: 111.8 mm (4.4 in) in 1980; 109.7 mm (4.3 in) in 2005; 88.9 mm (3.5 in) in 1988.
Download the Data
Data for Monahans standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Monahans 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.