Record envelope, standing records and threshold days for El Dorado 1 SSW (USC00472507), Wisconsin, United States, with 43 years of record.
Key Facts for El Dorado 1 SSW
El Dorado 1 SSW (USC00472507) is a weather station in Wisconsin, United States at 43.80 latitude and -88.63 longitude, 271 m (889 ft) above sea level.
The station reports from 1939 to 1981, 43 years of record.
1,464 records set at El Dorado 1 SSW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
El Dorado 1 SSW set a daily record precipitation of 50.8 mm (2.0 in) on 15 June 1981.
About the Station
Location: Wisconsin, United States, 43.80 latitude, -88.63 longitude.
Elevation: 271 m (889 ft).
Period of record: 1939 to 1981, 43 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 El Dorado 1 SSW. 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 El Dorado 1 SSW, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
12.8 C (55.0 F)
-36.1 C (-33.0 F)
n/a
n/a
Feb
15.6 C (60.1 F)
-32.8 C (-27.0 F)
n/a
n/a
Mar
24.4 C (75.9 F)
-33.3 C (-27.9 F)
n/a
n/a
Apr
32.2 C (90.0 F)
-12.2 C (10.0 F)
n/a
n/a
May
32.8 C (91.0 F)
-5.0 C (23.0 F)
n/a
n/a
Jun
36.1 C (97.0 F)
-1.1 C (30.0 F)
n/a
n/a
Jul
37.8 C (100.0 F)
1.7 C (35.1 F)
n/a
n/a
Aug
37.8 C (100.0 F)
1.7 C (35.1 F)
n/a
n/a
Sep
35.6 C (96.1 F)
-6.7 C (19.9 F)
n/a
n/a
Oct
33.3 C (91.9 F)
-10.0 C (14.0 F)
n/a
n/a
Nov
23.3 C (73.9 F)
-23.9 C (-11.0 F)
n/a
n/a
Dec
16.7 C (62.1 F)
-28.3 C (-18.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at El Dorado 1 SSW still stand. 1964 holds the most, with 57.
Standing records at El Dorado 1 SSW by the year they were set
Year set
Standing records
1939
35
1940
47
1941
34
1942
38
1943
36
1944
36
1945
43
1946
27
1947
53
1948
30
1949
36
1950
45
1951
44
1952
32
1953
30
1954
28
1955
27
1956
27
1957
22
1958
28
1959
39
1960
30
1961
27
1962
41
1963
52
1964
57
1965
45
1966
29
1967
37
1968
30
1969
30
1970
31
1971
25
1972
27
1973
41
1974
36
1975
15
1976
41
1977
48
1978
23
1979
35
1980
14
1981
13
All-Time Record Progression
3 new records
3 all-time records were set at El Dorado 1 SSW between 15 January 1972 and 24 January 1979. Each dot is a new record.
When El Dorado 1 SSW set new all-time records
Date
Kind
Detail
1972-01-15
Record low maximum temperature
Record low maximum temperature -25.0 C (-13.0 F)
1979-01-23
Record snow depth
Record snow depth 66.0 cm (26.0 in)
1979-01-24
Record snow depth
Record snow depth 71.1 cm (28.0 in)
Wettest Day of Each Month
May: 103.4 mm (4.1 in)
The wettest day on record for each calendar month at El Dorado 1 SSW. The most was 103.4 mm (4.1 in) on 31 May 1942.
Record daily precipitation for each month at El Dorado 1 SSW
Month
Record daily precipitation (mm)
Date
Jan
29.0 mm (1.1 in)
11 January 1940
Feb
37.8 mm (1.5 in)
22 February 1981
Mar
33.0 mm (1.3 in)
23 March 1966
Apr
70.1 mm (2.8 in)
4 April 1978
May
103.4 mm (4.1 in)
31 May 1942
Jun
81.8 mm (3.2 in)
22 June 1940
Jul
68.1 mm (2.7 in)
18 July 1952
Aug
58.9 mm (2.3 in)
10 August 1971
Sep
84.8 mm (3.3 in)
30 September 1961
Oct
89.4 mm (3.5 in)
3 October 1954
Nov
48.5 mm (1.9 in)
2 November 1971
Dec
34.3 mm (1.4 in)
27 December 1946
Period of Record Coverage
1939 to 1981
Complete yearUnder 90 percent of days
43 years of record at El Dorado 1 SSW, 1939 to 1981. 4 years have data for under 90 percent of days and are left out of rankings: 1939, 1975, 1980, 1981.
Cooler than the station meanWarmer than the station mean
One stripe for each of 37 complete years at El Dorado 1 SSW, 1940 to 1979. Blue stripes are years cooler than the station's own mean of 7.3 C (45.2 F); red stripes are warmer. The coolest year was 1951, at 5.7 C (42.2 F), and the warmest was 1973, at 8.6 C (47.5 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at El Dorado 1 SSW as warming stripes, 1940 to 1979
Year
Annual mean temperature
Difference from the station mean
1940
6.6 C
-0.75 C
1941
8.2 C
+0.86 C
1942
7.2 C
-0.17 C
1943
6.9 C
-0.45 C
1944
8.0 C
+0.65 C
1945
6.9 C
-0.45 C
1946
8.5 C
+1.15 C
1947
7.5 C
+0.12 C
1948
7.7 C
+0.34 C
1949
7.8 C
+0.43 C
1950
6.1 C
-1.21 C
1951
5.7 C
-1.65 C
1952
7.8 C
+0.49 C
1953
8.5 C
+1.18 C
1954
8.3 C
+0.91 C
1955
7.9 C
+0.55 C
1956
7.5 C
+0.19 C
1958
7.3 C
-0.03 C
1959
7.0 C
-0.34 C
1960
7.4 C
+0.06 C
1961
8.0 C
+0.67 C
1962
7.1 C
-0.25 C
1963
7.2 C
-0.14 C
1964
8.3 C
+0.91 C
1965
7.3 C
-0.03 C
1966
7.2 C
-0.14 C
1967
6.9 C
-0.46 C
1968
8.1 C
+0.75 C
1969
6.8 C
-0.56 C
1970
7.2 C
-0.15 C
1971
7.3 C
-0.09 C
1972
6.2 C
-1.14 C
1973
8.6 C
+1.28 C
1974
7.2 C
-0.16 C
1977
7.4 C
+0.02 C
1978
6.3 C
-1.00 C
1979
6.0 C
-1.34 C
The fitted trend in annual mean temperature here over 1940 to 1979 is -0.1 C (-0.3 to 0.1) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.2 F (-0.6 to 0.2) per decade. The slope is a straight line fitted to 37 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at El Dorado 1 SSW
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.1 C (-0.3 to 0.1) per decade
-0.2 F (-0.6 to 0.2) per decade
1940 to 1979
37
Not clearly different from zero
Mean daily maximum
-0.2 C (-0.4 to 0.1) per decade
-0.3 F (-0.7 to 0.1) per decade
1940 to 1979
37
Not clearly different from zero
Mean daily minimum
-0.1 C (-0.3 to 0.1) per decade
-0.1 F (-0.5 to 0.3) per decade
1940 to 1979
37
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
1939 to 1981
Yearly extremes at El Dorado 1 SSW: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
37.8 C (100.0 F)
1941
34.4 C (93.9 F)
43
Coldest night (TNn)
-36.1 C (-33.0 F)
1951
-27.8 C (-18.0 F)
43
Wettest day (Rx1day)
103.4 mm (4.1 in)
1942
50.3 mm (2.0 in)
43
Wettest five days (Rx5day)
138.2 mm (5.4 in)
1954
72.9 mm (2.9 in)
43
Longest dry spell (CDD)
45 days
1977
24 days
43
Hottest day (TXx)
The hottest day of the year at El Dorado 1 SSW, 1939 to 1981. The record is 37.8 C (100.0 F) in 1941, marked on the chart; the median year is 34.4 C (93.9 F).
Hottest day (TXx) at El Dorado 1 SSW by year
Year
Hottest day (TXx)
1939
36.1 C (97.0 F)
1940
36.1 C (97.0 F)
1941
37.8 C (100.0 F)
1942
33.3 C (91.9 F)
1943
33.9 C (93.0 F)
1944
36.1 C (97.0 F)
1945
35.6 C (96.1 F)
1946
35.0 C (95.0 F)
1947
37.2 C (99.0 F)
1948
37.8 C (100.0 F)
1949
35.6 C (96.1 F)
1950
32.8 C (91.0 F)
1951
32.2 C (90.0 F)
1952
34.4 C (93.9 F)
1953
35.6 C (96.1 F)
1954
34.4 C (93.9 F)
1955
37.8 C (100.0 F)
1956
33.3 C (91.9 F)
1957
33.3 C (91.9 F)
1958
34.4 C (93.9 F)
1959
34.4 C (93.9 F)
1960
33.3 C (91.9 F)
1961
35.0 C (95.0 F)
1962
32.8 C (91.0 F)
1963
36.1 C (97.0 F)
1964
37.2 C (99.0 F)
1965
36.1 C (97.0 F)
1966
36.1 C (97.0 F)
1967
33.3 C (91.9 F)
1968
34.4 C (93.9 F)
1969
33.9 C (93.0 F)
1970
35.0 C (95.0 F)
1971
33.3 C (91.9 F)
1972
33.9 C (93.0 F)
1973
35.0 C (95.0 F)
1974
35.0 C (95.0 F)
1975
34.4 C (93.9 F)
1976
35.6 C (96.1 F)
1977
34.4 C (93.9 F)
1978
33.3 C (91.9 F)
1979
32.2 C (90.0 F)
1980
34.4 C (93.9 F)
1981
31.7 C (89.1 F)
Coldest night (TNn)
The coldest night of the year at El Dorado 1 SSW, 1939 to 1981. The record is -36.1 C (-33.0 F) in 1951, marked on the chart; the median year is -27.8 C (-18.0 F).
Coldest night (TNn) at El Dorado 1 SSW by year
Year
Coldest night (TNn)
1939
-20.0 C (-4.0 F)
1940
-29.4 C (-20.9 F)
1941
-26.1 C (-15.0 F)
1942
-32.2 C (-26.0 F)
1943
-30.6 C (-23.1 F)
1944
-25.0 C (-13.0 F)
1945
-26.7 C (-16.1 F)
1946
-25.6 C (-14.1 F)
1947
-24.4 C (-11.9 F)
1948
-28.9 C (-20.0 F)
1949
-27.8 C (-18.0 F)
1950
-27.2 C (-17.0 F)
1951
-36.1 C (-33.0 F)
1952
-28.3 C (-18.9 F)
1953
-23.3 C (-9.9 F)
1954
-28.3 C (-18.9 F)
1955
-26.1 C (-15.0 F)
1956
-26.1 C (-15.0 F)
1957
-26.1 C (-15.0 F)
1958
-26.1 C (-15.0 F)
1959
-30.0 C (-22.0 F)
1960
-23.9 C (-11.0 F)
1961
-26.7 C (-16.1 F)
1962
-33.3 C (-27.9 F)
1963
-35.6 C (-32.1 F)
1964
-23.3 C (-9.9 F)
1965
-30.0 C (-22.0 F)
1966
-31.1 C (-24.0 F)
1967
-30.0 C (-22.0 F)
1968
-28.3 C (-18.9 F)
1969
-27.2 C (-17.0 F)
1970
-31.1 C (-24.0 F)
1971
-30.6 C (-23.1 F)
1972
-35.6 C (-32.1 F)
1973
-24.4 C (-11.9 F)
1974
-28.9 C (-20.0 F)
1975
-27.2 C (-17.0 F)
1976
-27.8 C (-18.0 F)
1977
-33.9 C (-29.0 F)
1978
-27.8 C (-18.0 F)
1979
-35.6 C (-32.1 F)
1980
-26.1 C (-15.0 F)
1981
-25.6 C (-14.1 F)
Wettest day (Rx1day)
The wettest day of the year at El Dorado 1 SSW, 1939 to 1981. The record is 103.4 mm (4.1 in) in 1942, marked on the chart; the median year is 50.3 mm (2.0 in).
Wettest day (Rx1day) at El Dorado 1 SSW by year
Year
Wettest day (Rx1day)
1939
51.3 mm (2.0 in)
1940
81.8 mm (3.2 in)
1941
43.2 mm (1.7 in)
1942
103.4 mm (4.1 in)
1943
47.0 mm (1.9 in)
1944
48.3 mm (1.9 in)
1945
49.0 mm (1.9 in)
1946
50.8 mm (2.0 in)
1947
42.2 mm (1.7 in)
1948
27.9 mm (1.1 in)
1949
49.5 mm (1.9 in)
1950
57.7 mm (2.3 in)
1951
50.3 mm (2.0 in)
1952
68.1 mm (2.7 in)
1953
35.6 mm (1.4 in)
1954
89.4 mm (3.5 in)
1955
45.7 mm (1.8 in)
1956
61.0 mm (2.4 in)
1957
50.3 mm (2.0 in)
1958
38.1 mm (1.5 in)
1959
55.9 mm (2.2 in)
1960
57.2 mm (2.3 in)
1961
84.8 mm (3.3 in)
1962
38.9 mm (1.5 in)
1963
49.3 mm (1.9 in)
1964
42.7 mm (1.7 in)
1965
53.8 mm (2.1 in)
1966
36.6 mm (1.4 in)
1967
53.1 mm (2.1 in)
1968
47.0 mm (1.9 in)
1969
71.6 mm (2.8 in)
1970
40.6 mm (1.6 in)
1971
58.9 mm (2.3 in)
1972
71.1 mm (2.8 in)
1973
26.2 mm (1.0 in)
1974
58.9 mm (2.3 in)
1975
28.2 mm (1.1 in)
1976
51.3 mm (2.0 in)
1977
45.5 mm (1.8 in)
1978
77.5 mm (3.1 in)
1979
44.7 mm (1.8 in)
1980
52.8 mm (2.1 in)
1981
50.8 mm (2.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at El Dorado 1 SSW, 1939 to 1981. The record is 138.2 mm (5.4 in) in 1954, marked on the chart; the median year is 72.9 mm (2.9 in).
Wettest five days (Rx5day) at El Dorado 1 SSW by year
Year
Wettest five days (Rx5day)
1939
86.8 mm (3.4 in)
1940
127.0 mm (5.0 in)
1941
79.6 mm (3.1 in)
1942
124.4 mm (4.9 in)
1943
76.6 mm (3.0 in)
1944
76.3 mm (3.0 in)
1945
75.4 mm (3.0 in)
1946
70.4 mm (2.8 in)
1947
54.1 mm (2.1 in)
1948
52.9 mm (2.1 in)
1949
64.5 mm (2.5 in)
1950
113.1 mm (4.5 in)
1951
60.5 mm (2.4 in)
1952
118.9 mm (4.7 in)
1953
94.2 mm (3.7 in)
1954
138.2 mm (5.4 in)
1955
54.8 mm (2.2 in)
1956
72.1 mm (2.8 in)
1957
54.4 mm (2.1 in)
1958
61.3 mm (2.4 in)
1959
60.7 mm (2.4 in)
1960
114.8 mm (4.5 in)
1961
102.6 mm (4.0 in)
1962
44.0 mm (1.7 in)
1963
93.5 mm (3.7 in)
1964
54.1 mm (2.1 in)
1965
113.8 mm (4.5 in)
1966
62.7 mm (2.5 in)
1967
77.7 mm (3.1 in)
1968
64.3 mm (2.5 in)
1969
134.5 mm (5.3 in)
1970
69.0 mm (2.7 in)
1971
72.9 mm (2.9 in)
1972
99.8 mm (3.9 in)
1973
59.2 mm (2.3 in)
1974
69.8 mm (2.7 in)
1975
47.2 mm (1.9 in)
1976
77.5 mm (3.1 in)
1977
54.1 mm (2.1 in)
1978
123.7 mm (4.9 in)
1979
53.9 mm (2.1 in)
1980
80.0 mm (3.1 in)
1981
51.8 mm (2.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at El Dorado 1 SSW, 1939 to 1981. The record is 45 days in 1977, marked on the chart; the median year is 24 days.
Longest dry spell (CDD) at El Dorado 1 SSW by year
Year
Longest dry spell (CDD)
1939
29 days
1940
17 days
1941
28 days
1942
26 days
1943
26 days
1944
25 days
1945
16 days
1946
20 days
1947
24 days
1948
19 days
1949
23 days
1950
18 days
1951
14 days
1952
30 days
1953
31 days
1954
21 days
1955
27 days
1956
25 days
1957
24 days
1958
30 days
1959
16 days
1960
26 days
1961
30 days
1962
17 days
1963
18 days
1964
24 days
1965
17 days
1966
19 days
1967
28 days
1968
40 days
1969
22 days
1970
33 days
1971
19 days
1972
26 days
1973
17 days
1974
15 days
1975
15 days
1976
32 days
1977
45 days
1978
29 days
1979
25 days
1980
21 days
1981
34 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
37 years with a frost
Across 37 years with a frost, the median last spring frost at El Dorado 1 SSW falls on 8 May and the median first autumn frost on 29 September, which leaves a median of 149 days between them.
Fitted over all years, the growing season changes by +2.6 days per decade at this station.
Frost dates and growing season at El Dorado 1 SSW
Measure
Median, all years
Earliest period
Recent period (1947 to 1979)
Recent against earliest
Fitted trend
Last spring frost
8 May
n/a
8 May
n/a
-0.6 days per decade
First autumn frost
29 September
n/a
30 September
n/a
+2.0 days per decade
Growing days
149 days
n/a
150 days
n/a
+2.6 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
39 years, 1940 to 1980
A day with at least 51.0 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 110.6 mm (4.4 in) of rain is expected about once in 100 years.
Rainfall return levels at El Dorado 1 SSW: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
51.0 mm (2.0 in)
5 years
65.6 mm (2.6 in)
10 years
75.8 mm (3.0 in)
25 years
89.3 mm (3.5 in)
50 years
99.8 mm (3.9 in)
Longer than the 39 years of record
100 years
110.6 mm (4.4 in)
Longer than the 39 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, 39 years of values from 1940 to 1980.
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: 103.4 mm (4.1 in) in 1942; 89.4 mm (3.5 in) in 1954; 84.8 mm (3.3 in) in 1961.
Download the Data
Data for El Dorado 1 SSW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for El Dorado 1 SSW 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.