Record envelope, standing records and threshold days for Hillsboro (USC00473654), Wisconsin, United States, with 63 years of record.
Key Facts for Hillsboro
Hillsboro (USC00473654) is a weather station in Wisconsin, United States at 43.65 latitude and -90.33 longitude, 287 m (940 ft) above sea level.
The station reports from 1948 to 2010, 63 years of record.
1,464 records set at Hillsboro still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Hillsboro set a daily record precipitation of 54.1 mm (2.1 in) on 23 September 2010.
About the Station
Location: Wisconsin, United States, 43.65 latitude, -90.33 longitude.
Elevation: 287 m (940 ft).
Period of record: 1948 to 2010, 63 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 Hillsboro. 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 Hillsboro, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
15.0 C (59.0 F)
-42.2 C (-44.0 F)
n/a
n/a
Feb
16.1 C (61.0 F)
-40.0 C (-40.0 F)
n/a
n/a
Mar
28.3 C (82.9 F)
-38.9 C (-38.0 F)
n/a
n/a
Apr
32.8 C (91.0 F)
-16.7 C (1.9 F)
n/a
n/a
May
33.3 C (91.9 F)
-7.2 C (19.0 F)
n/a
n/a
Jun
37.8 C (100.0 F)
0.0 C (32.0 F)
n/a
n/a
Jul
37.8 C (100.0 F)
5.0 C (41.0 F)
n/a
n/a
Aug
38.3 C (100.9 F)
0.6 C (33.1 F)
n/a
n/a
Sep
35.6 C (96.1 F)
-5.0 C (23.0 F)
n/a
n/a
Oct
33.3 C (91.9 F)
-11.7 C (10.9 F)
n/a
n/a
Nov
23.9 C (75.0 F)
-23.3 C (-9.9 F)
n/a
n/a
Dec
17.8 C (64.0 F)
-36.1 C (-33.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Hillsboro still stand. 1963 holds the most, with 57.
Standing records at Hillsboro by the year they were set
Year set
Standing records
1959
43
1960
27
1961
15
1962
39
1963
57
1964
56
1965
50
1966
36
1967
35
1968
32
1969
17
1970
19
1971
33
1972
28
1973
18
1974
26
1975
20
1976
28
1977
19
1978
9
1979
22
1980
17
1981
21
1982
25
1983
40
1984
26
1985
41
1986
25
1987
15
1988
36
1989
24
1990
28
1991
48
1992
29
1993
19
1994
40
1995
30
1996
38
1997
19
1998
23
1999
23
2000
35
2001
36
2002
26
2003
24
2004
19
2005
25
2006
23
2007
30
2008
22
2009
18
2010
10
All-Time Record Progression
4 new records
4 all-time records were set at Hillsboro between 17 July 2006 and 8 June 2008. Each dot is a new record.
When Hillsboro set new all-time records
Date
Kind
Detail
2006-07-17
Record high minimum temperature
Record high minimum temperature 26.1 C (79.0 F)
2007-08-19
Record daily precipitation
Record daily precipitation 114.3 mm (4.5 in)
2008-02-18
Record daily snowfall
Record daily snowfall 31.8 cm (12.5 in)
2008-06-08
Record daily precipitation
Record daily precipitation 117.9 mm (4.6 in)
Wettest Day of Each Month
Jun: 117.9 mm (4.6 in)
The wettest day on record for each calendar month at Hillsboro. The most was 117.9 mm (4.6 in) on 8 June 2008.
Record daily precipitation for each month at Hillsboro
Month
Record daily precipitation (mm)
Date
Jan
27.2 mm (1.1 in)
8 January 2008
Feb
31.2 mm (1.2 in)
19 February 1971
Mar
53.1 mm (2.1 in)
31 March 1998
Apr
81.3 mm (3.2 in)
4 April 1981
May
84.6 mm (3.3 in)
18 May 2000
Jun
117.9 mm (4.6 in)
8 June 2008
Jul
91.4 mm (3.6 in)
15 July 2010
Aug
114.3 mm (4.5 in)
19 August 2007
Sep
85.6 mm (3.4 in)
10 September 1994
Oct
75.2 mm (3.0 in)
21 October 1965
Nov
61.7 mm (2.4 in)
4 November 2003
Dec
36.6 mm (1.4 in)
2 December 2007
Period of Record Coverage
1959 to 2010
Complete yearUnder 90 percent of days
52 years of record at Hillsboro, 1959 to 2010. 9 years have data for under 90 percent of days and are left out of rankings: 1969, 1970, 1973, 1974, 1977, 1978, 1981, 1982 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 40 complete years at Hillsboro, 1960 to 2009. Blue stripes are years cooler than the station's own mean of 7.2 C (45.0 F); red stripes are warmer. The coolest year was 1996, at 5.4 C (41.6 F), and the warmest was 1998, at 9.2 C (48.6 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Hillsboro as warming stripes, 1960 to 2009
Year
Annual mean temperature
Difference from the station mean
1960
7.2 C
-0.02 C
1961
7.5 C
+0.28 C
1962
7.0 C
-0.25 C
1963
6.7 C
-0.48 C
1964
7.8 C
+0.59 C
1966
7.0 C
-0.21 C
1967
6.5 C
-0.72 C
1968
8.0 C
+0.79 C
1971
7.1 C
-0.17 C
1972
6.4 C
-0.85 C
1975
8.0 C
+0.78 C
1979
6.0 C
-1.19 C
1980
6.9 C
-0.31 C
1983
7.2 C
-0.02 C
1984
7.3 C
+0.09 C
1985
6.4 C
-0.80 C
1986
7.0 C
-0.18 C
1987
8.4 C
+1.20 C
1988
7.0 C
-0.26 C
1989
5.8 C
-1.45 C
1990
7.6 C
+0.41 C
1991
7.1 C
-0.15 C
1992
6.7 C
-0.56 C
1993
5.9 C
-1.32 C
1994
6.6 C
-0.63 C
1995
6.8 C
-0.42 C
1996
5.4 C
-1.87 C
1997
6.6 C
-0.63 C
1998
9.2 C
+2.01 C
1999
8.2 C
+0.95 C
2000
7.6 C
+0.40 C
2001
8.4 C
+1.16 C
2002
8.2 C
+0.95 C
2003
7.1 C
-0.09 C
2004
7.4 C
+0.19 C
2005
8.2 C
+0.99 C
2006
8.9 C
+1.69 C
2007
8.4 C
+1.14 C
2008
6.5 C
-0.72 C
2009
7.0 C
-0.25 C
The fitted trend in annual mean temperature here over 1960 to 2009 is 0.1 C (-0.1 to 0.3) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.1 to 0.5) per decade. The slope is a straight line fitted to 40 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Hillsboro
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.1 to 0.3) per decade
0.2 F (-0.1 to 0.5) per decade
1960 to 2009
40
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.3 to 0.1) per decade
-0.1 F (-0.5 to 0.2) per decade
1960 to 2009
40
Not clearly different from zero
Mean daily minimum
0.3 C (0.1 to 0.5) per decade
0.5 F (0.2 to 0.9) per decade
1960 to 2009
40
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
1948 to 2010
Yearly extremes at Hillsboro: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
38.3 C (100.9 F)
1988
35.0 C (95.0 F)
52
Coldest night (TNn)
-42.2 C (-44.0 F)
1963
-32.2 C (-26.0 F)
52
Wettest day (Rx1day)
117.9 mm (4.6 in)
2008
61.0 mm (2.4 in)
56
Wettest five days (Rx5day)
235.0 mm (9.3 in)
1992
94.6 mm (3.7 in)
56
Longest dry spell (CDD)
48 days
1969
22 days
56
Hottest day (TXx)
The hottest day of the year at Hillsboro, 1948 to 2010. The record is 38.3 C (100.9 F) in 1988, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Hillsboro by year
Year
Hottest day (TXx)
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1959
33.9 C (93.0 F)
1960
35.0 C (95.0 F)
1961
33.9 C (93.0 F)
1962
33.3 C (91.9 F)
1963
37.8 C (100.0 F)
1964
37.2 C (99.0 F)
1965
37.2 C (99.0 F)
1966
36.7 C (98.1 F)
1967
33.3 C (91.9 F)
1968
34.4 C (93.9 F)
1969
33.3 C (91.9 F)
1970
35.6 C (96.1 F)
1971
35.0 C (95.0 F)
1972
34.4 C (93.9 F)
1973
35.0 C (95.0 F)
1974
37.2 C (99.0 F)
1975
33.9 C (93.0 F)
1976
36.7 C (98.1 F)
1977
37.2 C (99.0 F)
1978
35.6 C (96.1 F)
1979
33.9 C (93.0 F)
1980
37.8 C (100.0 F)
1981
32.8 C (91.0 F)
1982
35.0 C (95.0 F)
1983
37.2 C (99.0 F)
1984
36.7 C (98.1 F)
1985
35.0 C (95.0 F)
1986
35.0 C (95.0 F)
1987
35.0 C (95.0 F)
1988
38.3 C (100.9 F)
1989
34.4 C (93.9 F)
1990
37.2 C (99.0 F)
1991
32.8 C (91.0 F)
1992
32.2 C (90.0 F)
1993
31.1 C (88.0 F)
1994
33.9 C (93.0 F)
1995
37.8 C (100.0 F)
1996
33.3 C (91.9 F)
1997
32.8 C (91.0 F)
1998
31.7 C (89.1 F)
1999
36.1 C (97.0 F)
2000
33.3 C (91.9 F)
2001
36.1 C (97.0 F)
2002
34.4 C (93.9 F)
2003
36.1 C (97.0 F)
2004
31.1 C (88.0 F)
2005
34.4 C (93.9 F)
2006
36.7 C (98.1 F)
2007
34.4 C (93.9 F)
2008
31.7 C (89.1 F)
2009
35.6 C (96.1 F)
2010
32.8 C (91.0 F)
Coldest night (TNn)
The coldest night of the year at Hillsboro, 1948 to 2010. The record is -42.2 C (-44.0 F) in 1963, marked on the chart; the median year is -32.2 C (-26.0 F).
Coldest night (TNn) at Hillsboro by year
Year
Coldest night (TNn)
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1959
-33.9 C (-29.0 F)
1960
-27.2 C (-17.0 F)
1961
-30.6 C (-23.1 F)
1962
-38.9 C (-38.0 F)
1963
-42.2 C (-44.0 F)
1964
-28.3 C (-18.9 F)
1965
-37.2 C (-35.0 F)
1966
-33.9 C (-29.0 F)
1967
-37.8 C (-36.0 F)
1968
-29.4 C (-20.9 F)
1969
-32.8 C (-27.0 F)
1970
-36.7 C (-34.1 F)
1971
-37.2 C (-35.0 F)
1972
-33.3 C (-27.9 F)
1973
-26.7 C (-16.1 F)
1974
-32.2 C (-26.0 F)
1975
-29.4 C (-20.9 F)
1976
-31.7 C (-25.1 F)
1977
-35.6 C (-32.1 F)
1978
-26.7 C (-16.1 F)
1979
-35.0 C (-31.0 F)
1980
-25.6 C (-14.1 F)
1981
-26.7 C (-16.1 F)
1982
-32.2 C (-26.0 F)
1983
-36.1 C (-33.0 F)
1984
-32.2 C (-26.0 F)
1985
-36.1 C (-33.0 F)
1986
-33.3 C (-27.9 F)
1987
-27.8 C (-18.0 F)
1988
-33.3 C (-27.9 F)
1989
-30.0 C (-22.0 F)
1990
-34.4 C (-29.9 F)
1991
-31.7 C (-25.1 F)
1992
-22.8 C (-9.0 F)
1993
-28.3 C (-18.9 F)
1994
-37.8 C (-36.0 F)
1995
-24.4 C (-11.9 F)
1996
-40.0 C (-40.0 F)
1997
-27.8 C (-18.0 F)
1998
-26.7 C (-16.1 F)
1999
-33.3 C (-27.9 F)
2000
-33.9 C (-29.0 F)
2001
-26.1 C (-15.0 F)
2002
-30.6 C (-23.1 F)
2003
-27.8 C (-18.0 F)
2004
-28.3 C (-18.9 F)
2005
-26.1 C (-15.0 F)
2006
-32.8 C (-27.0 F)
2007
-31.1 C (-24.0 F)
2008
-33.3 C (-27.9 F)
2009
-34.4 C (-29.9 F)
2010
-28.3 C (-18.9 F)
Wettest day (Rx1day)
The wettest day of the year at Hillsboro, 1948 to 2010. The record is 117.9 mm (4.6 in) in 2008, marked on the chart; the median year is 61.0 mm (2.4 in).
Wettest day (Rx1day) at Hillsboro by year
Year
Wettest day (Rx1day)
1948
31.0 mm (1.2 in)
1949
40.6 mm (1.6 in)
1950
42.4 mm (1.7 in)
1951
70.1 mm (2.8 in)
1959
105.4 mm (4.1 in)
1960
58.2 mm (2.3 in)
1961
50.8 mm (2.0 in)
1962
43.9 mm (1.7 in)
1963
39.4 mm (1.6 in)
1964
42.4 mm (1.7 in)
1965
75.2 mm (3.0 in)
1966
35.3 mm (1.4 in)
1967
83.1 mm (3.3 in)
1968
66.3 mm (2.6 in)
1969
48.5 mm (1.9 in)
1970
38.6 mm (1.5 in)
1971
82.0 mm (3.2 in)
1972
66.0 mm (2.6 in)
1973
54.1 mm (2.1 in)
1974
50.8 mm (2.0 in)
1975
51.3 mm (2.0 in)
1976
32.8 mm (1.3 in)
1977
68.3 mm (2.7 in)
1978
29.0 mm (1.1 in)
1979
51.3 mm (2.0 in)
1980
89.9 mm (3.5 in)
1981
81.3 mm (3.2 in)
1982
61.2 mm (2.4 in)
1983
59.9 mm (2.4 in)
1984
80.5 mm (3.2 in)
1985
60.7 mm (2.4 in)
1986
68.8 mm (2.7 in)
1987
65.5 mm (2.6 in)
1988
47.2 mm (1.9 in)
1989
81.3 mm (3.2 in)
1990
61.5 mm (2.4 in)
1991
56.1 mm (2.2 in)
1992
70.6 mm (2.8 in)
1993
37.3 mm (1.5 in)
1994
85.6 mm (3.4 in)
1995
51.8 mm (2.0 in)
1996
99.3 mm (3.9 in)
1997
67.3 mm (2.6 in)
1998
53.1 mm (2.1 in)
1999
55.9 mm (2.2 in)
2000
84.6 mm (3.3 in)
2001
84.6 mm (3.3 in)
2002
61.2 mm (2.4 in)
2003
88.4 mm (3.5 in)
2004
75.7 mm (3.0 in)
2005
51.3 mm (2.0 in)
2006
48.3 mm (1.9 in)
2007
114.3 mm (4.5 in)
2008
117.9 mm (4.6 in)
2009
44.5 mm (1.8 in)
2010
91.4 mm (3.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Hillsboro, 1948 to 2010. The record is 235.0 mm (9.3 in) in 1992, marked on the chart; the median year is 94.6 mm (3.7 in).
Wettest five days (Rx5day) at Hillsboro by year
Year
Wettest five days (Rx5day)
1948
42.7 mm (1.7 in)
1949
61.3 mm (2.4 in)
1950
73.9 mm (2.9 in)
1951
70.1 mm (2.8 in)
1959
105.4 mm (4.1 in)
1960
86.6 mm (3.4 in)
1961
81.8 mm (3.2 in)
1962
82.0 mm (3.2 in)
1963
63.0 mm (2.5 in)
1964
64.0 mm (2.5 in)
1965
121.7 mm (4.8 in)
1966
68.3 mm (2.7 in)
1967
122.0 mm (4.8 in)
1968
95.7 mm (3.8 in)
1969
94.7 mm (3.7 in)
1970
84.6 mm (3.3 in)
1971
110.3 mm (4.3 in)
1972
111.0 mm (4.4 in)
1973
80.7 mm (3.2 in)
1974
71.9 mm (2.8 in)
1975
110.7 mm (4.4 in)
1976
80.1 mm (3.2 in)
1977
79.0 mm (3.1 in)
1978
53.1 mm (2.1 in)
1979
72.2 mm (2.8 in)
1980
158.7 mm (6.2 in)
1981
97.6 mm (3.8 in)
1982
108.5 mm (4.3 in)
1983
82.5 mm (3.2 in)
1984
88.9 mm (3.5 in)
1985
130.8 mm (5.1 in)
1986
72.1 mm (2.8 in)
1987
91.7 mm (3.6 in)
1988
111.5 mm (4.4 in)
1989
104.9 mm (4.1 in)
1990
90.2 mm (3.6 in)
1991
95.8 mm (3.8 in)
1992
235.0 mm (9.3 in)
1993
79.7 mm (3.1 in)
1994
120.7 mm (4.8 in)
1995
73.0 mm (2.9 in)
1996
120.9 mm (4.8 in)
1997
87.6 mm (3.4 in)
1998
95.0 mm (3.7 in)
1999
97.0 mm (3.8 in)
2000
112.0 mm (4.4 in)
2001
117.2 mm (4.6 in)
2002
74.5 mm (2.9 in)
2003
94.5 mm (3.7 in)
2004
155.4 mm (6.1 in)
2005
105.1 mm (4.1 in)
2006
117.9 mm (4.6 in)
2007
156.6 mm (6.2 in)
2008
215.5 mm (8.5 in)
2009
82.3 mm (3.2 in)
2010
94.7 mm (3.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Hillsboro, 1948 to 2010. The record is 48 days in 1969, marked on the chart; the median year is 22 days.
Longest dry spell (CDD) at Hillsboro by year
Year
Longest dry spell (CDD)
1948
20 days
1949
27 days
1950
19 days
1951
10 days
1959
26 days
1960
23 days
1961
21 days
1962
29 days
1963
22 days
1964
39 days
1965
15 days
1966
25 days
1967
24 days
1968
46 days
1969
48 days
1970
22 days
1971
23 days
1972
27 days
1973
20 days
1974
25 days
1975
17 days
1976
34 days
1977
15 days
1978
20 days
1979
18 days
1980
17 days
1981
25 days
1982
17 days
1983
20 days
1984
25 days
1985
25 days
1986
23 days
1987
29 days
1988
40 days
1989
27 days
1990
17 days
1991
32 days
1992
13 days
1993
19 days
1994
14 days
1995
28 days
1996
18 days
1997
21 days
1998
20 days
1999
18 days
2000
13 days
2001
24 days
2002
31 days
2003
32 days
2004
17 days
2005
20 days
2006
19 days
2007
21 days
2008
14 days
2009
34 days
2010
21 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
40 years with a frost
Across 40 years with a frost, the median last spring frost at Hillsboro falls on 12 May and the median first autumn frost on 30 September, which leaves a median of 140 days between them.
Fitted over all years, the growing season changes by +7.1 days per decade at this station.
Frost dates and growing season at Hillsboro
Measure
Median, all years
Earliest period
Recent period (1975 to 2009)
Recent against earliest
Fitted trend
Last spring frost
12 May
n/a
8 May
n/a
-3.9 days per decade
First autumn frost
30 September
n/a
2 October
n/a
+3.2 days per decade
Growing days
140 days
n/a
145 days
n/a
+7.1 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
44 years, 1949 to 2009
A day with at least 61.5 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 132.8 mm (5.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Hillsboro: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
61.5 mm (2.4 in)
5 years
81.2 mm (3.2 in)
10 years
94.1 mm (3.7 in)
25 years
110.0 mm (4.3 in)
50 years
121.5 mm (4.8 in)
Longer than the 44 years of record
100 years
132.8 mm (5.2 in)
Longer than the 44 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, 44 years of values from 1949 to 2009.
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: 117.9 mm (4.6 in) in 2008; 114.3 mm (4.5 in) in 2007; 105.4 mm (4.1 in) in 1959.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Hillsboro, at 2005. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 2005 ran 0.3 C (0.6 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Hillsboro, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
2005
+0.3
+0.6
likely
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 Hillsboro standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Hillsboro 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.