Record envelope, standing records and threshold days for Thompsons 3 WSW (USC00418996), Texas, United States, with 82 years of record.
Key Facts for Thompsons 3 WSW
Thompsons 3 WSW (USC00418996) is a weather station in Texas, United States at 29.48 latitude and -95.63 longitude, 21 m (70 ft) above sea level.
The station reports from 1942 to 2023, 82 years of record.
1,464 records set at Thompsons 3 WSW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Thompsons 3 WSW set a daily record high minimum temperature of 26.7 C (80.1 F) on 31 July 2023.
About the Station
Location: Texas, United States, 29.48 latitude, -95.63 longitude.
Elevation: 21 m (70 ft).
Period of record: 1942 to 2023, 82 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 Thompsons 3 WSW. 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 Thompsons 3 WSW, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
31.7 C (89.1 F)
-10.6 C (12.9 F)
n/a
n/a
Feb
31.7 C (89.1 F)
-6.7 C (19.9 F)
n/a
n/a
Mar
33.3 C (91.9 F)
-6.1 C (21.0 F)
n/a
n/a
Apr
37.8 C (100.0 F)
0.0 C (32.0 F)
n/a
n/a
May
40.0 C (104.0 F)
2.2 C (36.0 F)
n/a
n/a
Jun
41.1 C (106.0 F)
10.6 C (51.1 F)
n/a
n/a
Jul
41.1 C (106.0 F)
13.9 C (57.0 F)
n/a
n/a
Aug
42.2 C (108.0 F)
15.6 C (60.1 F)
n/a
n/a
Sep
40.0 C (104.0 F)
5.6 C (42.1 F)
n/a
n/a
Oct
36.7 C (98.1 F)
0.0 C (32.0 F)
n/a
n/a
Nov
33.9 C (93.0 F)
-6.1 C (21.0 F)
n/a
n/a
Dec
32.8 C (91.0 F)
-13.3 C (8.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Thompsons 3 WSW still stand. 2011 holds the most, with 61.
Standing records at Thompsons 3 WSW by the year they were set
Year set
Standing records
1942
13
1943
23
1944
30
1945
15
1957
8
1958
10
1959
20
1960
20
1961
32
1962
29
1963
19
1964
20
1965
19
1966
21
1967
30
1968
19
1969
20
1970
19
1971
21
1972
26
1973
29
1974
27
1975
12
1976
28
1977
8
1978
20
1979
7
1980
16
1981
17
1982
24
1983
29
1984
21
1985
16
1986
17
1987
15
1988
8
1989
55
1990
18
1991
18
1992
13
1993
17
1994
16
1995
17
1996
25
1997
5
1998
30
1999
19
2000
27
2001
8
2002
18
2003
12
2004
35
2005
28
2006
24
2007
15
2008
20
2009
27
2010
17
2011
61
2012
24
2013
46
2014
22
2015
22
2016
19
2017
22
2018
8
2019
20
2020
7
2021
11
2022
19
2023
11
All-Time Record Progression
8 new records
8 all-time records were set at Thompsons 3 WSW between 19 September 1983 and 27 August 2017. Each dot is a new record.
When Thompsons 3 WSW set new all-time records
Date
Kind
Detail
1983-09-19
Record daily precipitation
Record daily precipitation 242.1 mm (9.5 in)
1989-12-23
Record low maximum temperature
Record low maximum temperature -5.0 C (23.0 F)
1989-12-23
Record low minimum temperature
Record low minimum temperature -13.3 C (8.1 F)
2005-07-07
Record high maximum temperature
Record high maximum temperature 41.1 C (106.0 F)
2009-12-05
Record daily snowfall
Record daily snowfall 5.1 cm (2.0 in)
2010-07-27
Record high minimum temperature
Record high minimum temperature 30.6 C (87.1 F)
2011-08-29
Record high maximum temperature
Record high maximum temperature 42.2 C (108.0 F)
2017-08-27
Record daily precipitation
Record daily precipitation 285.2 mm (11.2 in)
Wettest Day of Each Month
Aug: 285.2 mm (11.2 in)
The wettest day on record for each calendar month at Thompsons 3 WSW. The most was 285.2 mm (11.2 in) on 27 August 2017.
Record daily precipitation for each month at Thompsons 3 WSW
Month
Record daily precipitation (mm)
Date
Jan
85.6 mm (3.4 in)
15 January 1991
Feb
78.7 mm (3.1 in)
27 February 2019
Mar
94.2 mm (3.7 in)
24 March 1973
Apr
219.7 mm (8.6 in)
19 April 2009
May
177.8 mm (7.0 in)
26 May 2015
Jun
215.4 mm (8.5 in)
26 June 1960
Jul
162.6 mm (6.4 in)
28 July 1943
Aug
285.2 mm (11.2 in)
27 August 2017
Sep
242.1 mm (9.5 in)
19 September 1983
Oct
153.7 mm (6.1 in)
31 October 1959
Nov
198.4 mm (7.8 in)
12 November 1985
Dec
92.7 mm (3.6 in)
8 December 2018
Period of Record Coverage
1942 to 2023
Complete yearUnder 90 percent of days
71 years of record at Thompsons 3 WSW, 1942 to 2023. 21 years have data for under 90 percent of days and are left out of rankings: 1942, 1957, 1958, 1971, 1974, 1988, 1996, 1997 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 43 complete years at Thompsons 3 WSW, 1943 to 2019. Blue stripes are years cooler than the station's own mean of 20.7 C (69.2 F); red stripes are warmer. The coolest year was 1976, at 19.4 C (66.9 F), and the warmest was 2012, at 22.3 C (72.2 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Thompsons 3 WSW as warming stripes, 1943 to 2019
Year
Annual mean temperature
Difference from the station mean
1943
20.7 C
-0.04 C
1944
21.7 C
+1.04 C
1959
20.0 C
-0.69 C
1960
19.9 C
-0.83 C
1961
20.0 C
-0.71 C
1962
20.6 C
-0.14 C
1963
20.2 C
-0.48 C
1964
20.0 C
-0.68 C
1965
20.7 C
+0.00 C
1966
19.6 C
-1.11 C
1967
20.4 C
-0.34 C
1968
19.5 C
-1.19 C
1969
20.5 C
-0.19 C
1970
19.6 C
-1.08 C
1972
20.4 C
-0.29 C
1973
20.1 C
-0.58 C
1975
20.5 C
-0.16 C
1976
19.4 C
-1.32 C
1977
20.4 C
-0.33 C
1979
19.9 C
-0.83 C
1980
20.6 C
-0.12 C
1982
21.0 C
+0.26 C
1983
19.7 C
-0.95 C
1985
20.5 C
-0.17 C
1986
21.1 C
+0.37 C
1987
20.4 C
-0.33 C
1989
20.2 C
-0.51 C
1990
21.6 C
+0.89 C
1991
20.9 C
+0.16 C
1992
20.6 C
-0.06 C
1993
20.5 C
-0.18 C
1994
21.0 C
+0.32 C
2002
21.4 C
+0.72 C
2004
21.9 C
+1.17 C
2005
22.0 C
+1.32 C
2007
20.9 C
+0.16 C
2009
21.5 C
+0.80 C
2011
22.2 C
+1.53 C
2012
22.3 C
+1.62 C
2014
20.9 C
+0.16 C
2015
21.6 C
+0.91 C
2016
21.9 C
+1.24 C
2019
21.2 C
+0.51 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1943 to 2019. In Fahrenheit: 0.4 F (0.3 to 0.6) per decade. The slope is a straight line fitted to 43 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Thompsons 3 WSW
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.3) per decade
0.4 F (0.3 to 0.6) per decade
1943 to 2019
43
Rise
Mean daily maximum
0.2 C (0.1 to 0.3) per decade
0.4 F (0.1 to 0.6) per decade
1943 to 2019
43
Rise
Mean daily minimum
0.3 C (0.2 to 0.4) per decade
0.5 F (0.3 to 0.6) per decade
1943 to 2019
43
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
1942 to 2023
Yearly extremes at Thompsons 3 WSW: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.2 C (108.0 F)
2011
37.8 C (100.0 F)
71
Coldest night (TNn)
-13.3 C (8.1 F)
1989
-4.4 C (24.1 F)
71
Wettest day (Rx1day)
285.2 mm (11.2 in)
2017
88.1 mm (3.5 in)
71
Wettest five days (Rx5day)
547.1 mm (21.5 in)
2017
142.9 mm (5.6 in)
71
Longest dry spell (CDD)
63 days
2009
23 days
71
Hottest day (TXx)
The hottest day of the year at Thompsons 3 WSW, 1942 to 2023. The record is 42.2 C (108.0 F) in 2011, marked on the chart; the median year is 37.8 C (100.0 F).
Hottest day (TXx) at Thompsons 3 WSW by year
Year
Hottest day (TXx)
1942
36.1 C (97.0 F)
1943
37.8 C (100.0 F)
1944
38.9 C (102.0 F)
1945
38.9 C (102.0 F)
1957
37.8 C (100.0 F)
1958
38.9 C (102.0 F)
1959
37.2 C (99.0 F)
1960
36.7 C (98.1 F)
1961
35.6 C (96.1 F)
1962
40.0 C (104.0 F)
1963
37.2 C (99.0 F)
1964
37.8 C (100.0 F)
1965
37.2 C (99.0 F)
1966
36.1 C (97.0 F)
1967
37.8 C (100.0 F)
1968
37.8 C (100.0 F)
1969
38.3 C (100.9 F)
1970
37.2 C (99.0 F)
1971
37.2 C (99.0 F)
1972
36.7 C (98.1 F)
1973
36.7 C (98.1 F)
1974
37.2 C (99.0 F)
1975
36.7 C (98.1 F)
1976
37.8 C (100.0 F)
1977
36.7 C (98.1 F)
1978
38.3 C (100.9 F)
1979
36.7 C (98.1 F)
1980
38.9 C (102.0 F)
1981
37.8 C (100.0 F)
1982
38.3 C (100.9 F)
1983
37.2 C (99.0 F)
1984
37.2 C (99.0 F)
1985
37.2 C (99.0 F)
1986
38.9 C (102.0 F)
1987
37.8 C (100.0 F)
1988
38.9 C (102.0 F)
1989
36.1 C (97.0 F)
1990
38.3 C (100.9 F)
1991
36.1 C (97.0 F)
1992
37.2 C (99.0 F)
1993
37.2 C (99.0 F)
1994
37.8 C (100.0 F)
1995
38.3 C (100.9 F)
1996
36.7 C (98.1 F)
1997
38.9 C (102.0 F)
1998
39.4 C (102.9 F)
1999
40.0 C (104.0 F)
2000
40.0 C (104.0 F)
2001
37.8 C (100.0 F)
2002
40.0 C (104.0 F)
2003
39.4 C (102.9 F)
2004
38.3 C (100.9 F)
2005
41.1 C (106.0 F)
2006
39.4 C (102.9 F)
2007
41.1 C (106.0 F)
2008
39.4 C (102.9 F)
2009
40.6 C (105.1 F)
2010
39.4 C (102.9 F)
2011
42.2 C (108.0 F)
2012
39.4 C (102.9 F)
2013
40.0 C (104.0 F)
2014
38.3 C (100.9 F)
2015
39.4 C (102.9 F)
2016
37.2 C (99.0 F)
2017
36.7 C (98.1 F)
2018
37.8 C (100.0 F)
2019
36.7 C (98.1 F)
2020
32.2 C (90.0 F)
2021
36.7 C (98.1 F)
2022
40.0 C (104.0 F)
2023
37.8 C (100.0 F)
Coldest night (TNn)
The coldest night of the year at Thompsons 3 WSW, 1942 to 2023. The record is -13.3 C (8.1 F) in 1989, marked on the chart; the median year is -4.4 C (24.1 F).
Coldest night (TNn) at Thompsons 3 WSW by year
Year
Coldest night (TNn)
1942
-0.6 C (30.9 F)
1943
-8.3 C (17.1 F)
1944
-3.9 C (25.0 F)
1945
-4.4 C (24.1 F)
1957
-6.7 C (19.9 F)
1958
-3.9 C (25.0 F)
1959
-5.6 C (21.9 F)
1960
-3.9 C (25.0 F)
1961
-4.4 C (24.1 F)
1962
-10.6 C (12.9 F)
1963
-8.3 C (17.1 F)
1964
-9.4 C (15.1 F)
1965
-3.3 C (26.1 F)
1966
-7.2 C (19.0 F)
1967
-6.7 C (19.9 F)
1968
-5.0 C (23.0 F)
1969
-5.0 C (23.0 F)
1970
-7.2 C (19.0 F)
1971
-5.6 C (21.9 F)
1972
-6.1 C (21.0 F)
1973
-6.7 C (19.9 F)
1974
-2.8 C (27.0 F)
1975
-3.9 C (25.0 F)
1976
-6.7 C (19.9 F)
1977
-7.2 C (19.0 F)
1978
-5.6 C (21.9 F)
1979
-7.8 C (18.0 F)
1980
-3.9 C (25.0 F)
1981
-6.1 C (21.0 F)
1982
-10.0 C (14.0 F)
1983
-10.6 C (12.9 F)
1984
-5.6 C (21.9 F)
1985
-7.8 C (18.0 F)
1986
-2.2 C (28.0 F)
1987
-1.7 C (28.9 F)
1988
-3.9 C (25.0 F)
1989
-13.3 C (8.1 F)
1990
-5.6 C (21.9 F)
1991
-5.0 C (23.0 F)
1992
-2.8 C (27.0 F)
1993
-2.8 C (27.0 F)
1994
-5.0 C (23.0 F)
1995
-1.7 C (28.9 F)
1996
-5.6 C (21.9 F)
1997
0.6 C (33.1 F)
1998
-1.1 C (30.0 F)
1999
-2.8 C (27.0 F)
2000
-3.9 C (25.0 F)
2001
-1.7 C (28.9 F)
2002
-6.1 C (21.0 F)
2003
-2.2 C (28.0 F)
2004
-2.2 C (28.0 F)
2005
-1.7 C (28.9 F)
2006
-6.1 C (21.0 F)
2007
-5.6 C (21.9 F)
2008
-2.8 C (27.0 F)
2009
-3.3 C (26.1 F)
2010
-7.2 C (19.0 F)
2011
-5.6 C (21.9 F)
2012
-5.6 C (21.9 F)
2013
-1.1 C (30.0 F)
2014
-4.4 C (24.1 F)
2015
-2.8 C (27.0 F)
2016
-1.1 C (30.0 F)
2017
-6.1 C (21.0 F)
2018
-1.7 C (28.9 F)
2019
-2.8 C (27.0 F)
2020
-0.6 C (30.9 F)
2021
10.0 C (50.0 F)
2022
7.2 C (45.0 F)
2023
23.9 C (75.0 F)
Wettest day (Rx1day)
The wettest day of the year at Thompsons 3 WSW, 1942 to 2023. The record is 285.2 mm (11.2 in) in 2017, marked on the chart; the median year is 88.1 mm (3.5 in).
Wettest day (Rx1day) at Thompsons 3 WSW by year
Year
Wettest day (Rx1day)
1942
66.0 mm (2.6 in)
1943
162.6 mm (6.4 in)
1944
91.4 mm (3.6 in)
1945
165.1 mm (6.5 in)
1957
80.0 mm (3.1 in)
1958
52.6 mm (2.1 in)
1959
153.7 mm (6.1 in)
1960
215.4 mm (8.5 in)
1961
126.5 mm (5.0 in)
1962
53.1 mm (2.1 in)
1963
78.2 mm (3.1 in)
1964
72.9 mm (2.9 in)
1965
119.9 mm (4.7 in)
1966
171.5 mm (6.8 in)
1967
78.0 mm (3.1 in)
1968
101.6 mm (4.0 in)
1969
67.3 mm (2.6 in)
1970
118.6 mm (4.7 in)
1971
118.1 mm (4.6 in)
1972
65.0 mm (2.6 in)
1973
162.6 mm (6.4 in)
1974
81.8 mm (3.2 in)
1975
58.4 mm (2.3 in)
1976
69.1 mm (2.7 in)
1977
61.0 mm (2.4 in)
1978
56.4 mm (2.2 in)
1979
127.5 mm (5.0 in)
1980
51.3 mm (2.0 in)
1981
90.7 mm (3.6 in)
1982
95.3 mm (3.8 in)
1983
242.1 mm (9.5 in)
1984
83.6 mm (3.3 in)
1985
198.4 mm (7.8 in)
1986
49.5 mm (1.9 in)
1987
144.8 mm (5.7 in)
1988
48.5 mm (1.9 in)
1989
223.5 mm (8.8 in)
1990
61.7 mm (2.4 in)
1991
85.6 mm (3.4 in)
1992
101.6 mm (4.0 in)
1993
102.1 mm (4.0 in)
1994
101.9 mm (4.0 in)
1995
65.3 mm (2.6 in)
1996
57.9 mm (2.3 in)
1997
114.3 mm (4.5 in)
1998
109.7 mm (4.3 in)
1999
81.8 mm (3.2 in)
2000
72.6 mm (2.9 in)
2001
132.1 mm (5.2 in)
2002
104.1 mm (4.1 in)
2003
137.2 mm (5.4 in)
2004
88.1 mm (3.5 in)
2005
53.3 mm (2.1 in)
2006
119.4 mm (4.7 in)
2007
94.0 mm (3.7 in)
2008
63.5 mm (2.5 in)
2009
219.7 mm (8.6 in)
2010
71.1 mm (2.8 in)
2011
100.6 mm (4.0 in)
2012
86.4 mm (3.4 in)
2013
75.2 mm (3.0 in)
2014
69.9 mm (2.8 in)
2015
177.8 mm (7.0 in)
2016
85.1 mm (3.4 in)
2017
285.2 mm (11.2 in)
2018
92.7 mm (3.6 in)
2019
162.6 mm (6.4 in)
2020
48.3 mm (1.9 in)
2021
85.9 mm (3.4 in)
2022
73.4 mm (2.9 in)
2023
33.3 mm (1.3 in)
Wettest five days (Rx5day)
The wettest five days of the year at Thompsons 3 WSW, 1942 to 2023. The record is 547.1 mm (21.5 in) in 2017, marked on the chart; the median year is 142.9 mm (5.6 in).
Wettest five days (Rx5day) at Thompsons 3 WSW by year
Year
Wettest five days (Rx5day)
1942
148.5 mm (5.8 in)
1943
272.3 mm (10.7 in)
1944
180.3 mm (7.1 in)
1945
271.8 mm (10.7 in)
1957
155.9 mm (6.1 in)
1958
91.4 mm (3.6 in)
1959
164.8 mm (6.5 in)
1960
416.9 mm (16.4 in)
1961
201.1 mm (7.9 in)
1962
103.5 mm (4.1 in)
1963
108.2 mm (4.3 in)
1964
103.1 mm (4.1 in)
1965
135.4 mm (5.3 in)
1966
201.2 mm (7.9 in)
1967
80.6 mm (3.2 in)
1968
156.2 mm (6.1 in)
1969
114.1 mm (4.5 in)
1970
144.8 mm (5.7 in)
1971
214.7 mm (8.5 in)
1972
114.0 mm (4.5 in)
1973
286.6 mm (11.3 in)
1974
164.7 mm (6.5 in)
1975
122.8 mm (4.8 in)
1976
99.6 mm (3.9 in)
1977
106.2 mm (4.2 in)
1978
105.8 mm (4.2 in)
1979
277.9 mm (10.9 in)
1980
106.0 mm (4.2 in)
1981
162.4 mm (6.4 in)
1982
97.3 mm (3.8 in)
1983
274.4 mm (10.8 in)
1984
144.6 mm (5.7 in)
1985
198.9 mm (7.8 in)
1986
121.1 mm (4.8 in)
1987
184.7 mm (7.3 in)
1988
66.6 mm (2.6 in)
1989
242.8 mm (9.6 in)
1990
98.5 mm (3.9 in)
1991
150.4 mm (5.9 in)
1992
127.3 mm (5.0 in)
1993
128.5 mm (5.1 in)
1994
242.7 mm (9.6 in)
1995
142.3 mm (5.6 in)
1996
137.2 mm (5.4 in)
1997
255.5 mm (10.1 in)
1998
80.2 mm (3.2 in)
1999
109.7 mm (4.3 in)
2000
110.2 mm (4.3 in)
2001
246.9 mm (9.7 in)
2002
170.5 mm (6.7 in)
2003
194.4 mm (7.7 in)
2004
164.6 mm (6.5 in)
2005
84.6 mm (3.3 in)
2006
188.0 mm (7.4 in)
2007
152.4 mm (6.0 in)
2008
103.6 mm (4.1 in)
2009
226.0 mm (8.9 in)
2010
142.3 mm (5.6 in)
2011
105.7 mm (4.2 in)
2012
127.3 mm (5.0 in)
2013
95.0 mm (3.7 in)
2014
108.8 mm (4.3 in)
2015
209.6 mm (8.3 in)
2016
142.9 mm (5.6 in)
2017
547.1 mm (21.5 in)
2018
119.2 mm (4.7 in)
2019
264.2 mm (10.4 in)
2020
55.9 mm (2.2 in)
2021
166.7 mm (6.6 in)
2022
90.4 mm (3.6 in)
2023
40.7 mm (1.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Thompsons 3 WSW, 1942 to 2023. The record is 63 days in 2009, marked on the chart; the median year is 23 days.
Longest dry spell (CDD) at Thompsons 3 WSW by year
Year
Longest dry spell (CDD)
1942
21 days
1943
22 days
1944
30 days
1945
38 days
1957
27 days
1958
26 days
1959
21 days
1960
22 days
1961
24 days
1962
26 days
1963
34 days
1964
25 days
1965
19 days
1966
26 days
1967
27 days
1968
17 days
1969
21 days
1970
29 days
1971
27 days
1972
31 days
1973
23 days
1974
21 days
1975
34 days
1976
25 days
1977
20 days
1978
32 days
1979
31 days
1980
30 days
1981
32 days
1982
21 days
1983
16 days
1984
22 days
1985
17 days
1986
26 days
1987
38 days
1988
17 days
1989
31 days
1990
22 days
1991
21 days
1992
23 days
1993
19 days
1994
23 days
1995
16 days
1996
23 days
1997
15 days
1998
32 days
1999
7 days
2000
3 days
2001
1 day
2002
16 days
2003
43 days
2004
25 days
2005
35 days
2006
20 days
2007
25 days
2008
25 days
2009
63 days
2010
36 days
2011
43 days
2012
26 days
2013
19 days
2014
24 days
2015
23 days
2016
24 days
2017
22 days
2018
20 days
2019
24 days
2020
16 days
2021
13 days
2022
21 days
2023
15 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
36 years with a frost
Across 36 years with a frost, the median last spring frost at Thompsons 3 WSW falls on 28 February and the median first autumn frost on 3 December, which leaves a median of 279 days between them.
Fitted over all years, the growing season changes by +2.4 days per decade at this station.
Frost dates and growing season at Thompsons 3 WSW
Measure
Median, all years
Earliest period
Recent period (1963 to 2019)
Recent against earliest
Fitted trend
Last spring frost
28 February
n/a
24 February
n/a
-2.1 days per decade
First autumn frost
3 December
n/a
5 December
n/a
+0.2 days per decade
Growing days
279 days
n/a
285 days
n/a
+2.4 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
57 years, 1943 to 2019
A day with at least 92.4 mm (3.6 in) of rain is expected about once in 2 years. A day with at least 302.5 mm (11.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Thompsons 3 WSW: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
92.4 mm (3.6 in)
5 years
135.4 mm (5.3 in)
10 years
168.5 mm (6.6 in)
25 years
216.5 mm (8.5 in)
50 years
257.3 mm (10.1 in)
100 years
302.5 mm (11.9 in)
Longer than the 57 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, 57 years of values from 1943 to 2019.
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: 242.1 mm (9.5 in) in 1983; 223.5 mm (8.8 in) in 1989; 219.7 mm (8.6 in) in 2009.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Thompsons 3 WSW, at 1973. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1973 ran 0.3 C (0.5 F) higher than in the years before (possible change).
Suspected changes in the annual mean temperature at Thompsons 3 WSW, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1973
+0.3
+0.5
possible
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for Thompsons 3 WSW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Thompsons 3 WSW 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.