Record envelope, standing records and threshold days for Ellsworth 15 NNE (USC00252647), Nebraska, United States, with 46 years of record.
Key Facts for Ellsworth 15 NNE
Ellsworth 15 NNE (USC00252647) is a weather station in Nebraska, United States at 42.27 latitude and -102.21 longitude, 1,210 m (3,970 ft) above sea level.
The station reports from 1963 to 2008, 46 years of record.
1,464 records set at Ellsworth 15 NNE still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Ellsworth 15 NNE set a monthly record low maximum temperature of -0.6 C (30.9 F) on 3 May 2008.
About the Station
Location: Nebraska, United States, 42.27 latitude, -102.21 longitude.
Elevation: 1,210 m (3,970 ft).
Period of record: 1963 to 2008, 46 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 Ellsworth 15 NNE. 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 Ellsworth 15 NNE, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
19.4 C (66.9 F)
-33.3 C (-27.9 F)
n/a
n/a
Feb
23.3 C (73.9 F)
-35.6 C (-32.1 F)
n/a
n/a
Mar
28.3 C (82.9 F)
-30.0 C (-22.0 F)
n/a
n/a
Apr
32.8 C (91.0 F)
-23.3 C (-9.9 F)
n/a
n/a
May
35.6 C (96.1 F)
-8.3 C (17.1 F)
n/a
n/a
Jun
40.0 C (104.0 F)
-1.7 C (28.9 F)
n/a
n/a
Jul
41.1 C (106.0 F)
3.3 C (37.9 F)
n/a
n/a
Aug
39.4 C (102.9 F)
1.7 C (35.1 F)
n/a
n/a
Sep
37.2 C (99.0 F)
-11.1 C (12.0 F)
n/a
n/a
Oct
33.3 C (91.9 F)
-20.6 C (-5.1 F)
n/a
n/a
Nov
26.1 C (79.0 F)
-27.8 C (-18.0 F)
n/a
n/a
Dec
20.6 C (69.1 F)
-41.1 C (-42.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Ellsworth 15 NNE still stand. 1989 holds the most, with 56.
Standing records at Ellsworth 15 NNE by the year they were set
Year set
Standing records
1963
30
1964
34
1965
46
1966
40
1967
39
1968
28
1969
35
1970
28
1971
25
1972
40
1973
30
1974
21
1975
27
1976
24
1977
30
1978
25
1979
35
1980
34
1981
23
1982
28
1983
44
1984
29
1985
44
1986
25
1987
39
1988
28
1989
56
1990
40
1991
27
1992
24
1993
37
1994
20
1995
45
1996
40
1997
47
1998
38
1999
20
2000
27
2001
21
2002
36
2003
34
2004
28
2005
28
2006
34
2007
28
2008
3
All-Time Record Progression
1 new records
1 all-time records were set at Ellsworth 15 NNE between 21 March 2006 and 21 March 2006. Each dot is a new record.
When Ellsworth 15 NNE set new all-time records
Date
Kind
Detail
2006-03-21
Record daily snowfall
Record daily snowfall 33.0 cm (13.0 in)
Wettest Day of Each Month
May: 91.4 mm (3.6 in)
The wettest day on record for each calendar month at Ellsworth 15 NNE. The most was 91.4 mm (3.6 in) on 28 May 1978.
Record daily precipitation for each month at Ellsworth 15 NNE
Month
Record daily precipitation (mm)
Date
Jan
16.0 mm (0.6 in)
19 January 1988
Feb
18.5 mm (0.7 in)
5 February 1986
Mar
35.6 mm (1.4 in)
8 March 2000
Apr
61.0 mm (2.4 in)
14 April 1999
May
91.4 mm (3.6 in)
28 May 1978
Jun
82.8 mm (3.3 in)
30 June 1988
Jul
58.7 mm (2.3 in)
10 July 1991
Aug
74.7 mm (2.9 in)
27 August 1963
Sep
72.9 mm (2.9 in)
2 September 1999
Oct
40.6 mm (1.6 in)
5 October 1998
Nov
23.9 mm (0.9 in)
1 November 2000
Dec
20.3 mm (0.8 in)
21 December 2006
Period of Record Coverage
1963 to 2008
Complete yearUnder 90 percent of days
46 years of record at Ellsworth 15 NNE, 1963 to 2008. 8 years have data for under 90 percent of days and are left out of rankings: 1963, 1980, 1982, 1987, 1988, 1990, 1992, 2008.
Cooler than the station meanWarmer than the station mean
One stripe for each of 34 complete years at Ellsworth 15 NNE, 1965 to 2007. Blue stripes are years cooler than the station's own mean of 8.1 C (46.6 F); red stripes are warmer. The coolest year was 1993, at 6.0 C (42.7 F), and the warmest was 1999, at 9.3 C (48.8 F). The strongest colour marks a difference of 2.2 C (4.0 F).
Annual mean temperature at Ellsworth 15 NNE as warming stripes, 1965 to 2007
Year
Annual mean temperature
Difference from the station mean
1965
8.4 C
+0.25 C
1966
7.9 C
-0.25 C
1967
8.3 C
+0.17 C
1968
8.0 C
-0.09 C
1969
8.1 C
+0.01 C
1970
8.2 C
+0.10 C
1971
8.0 C
-0.16 C
1972
7.8 C
-0.27 C
1973
8.4 C
+0.26 C
1974
8.6 C
+0.48 C
1975
7.7 C
-0.45 C
1976
8.6 C
+0.50 C
1977
9.2 C
+1.07 C
1979
6.8 C
-1.31 C
1981
9.3 C
+1.15 C
1983
7.4 C
-0.73 C
1984
7.9 C
-0.23 C
1985
6.8 C
-1.28 C
1986
8.4 C
+0.31 C
1987
8.6 C
+0.53 C
1988
8.0 C
-0.14 C
1989
7.5 C
-0.65 C
1991
8.3 C
+0.17 C
1993
6.0 C
-2.16 C
1994
8.0 C
-0.08 C
1995
7.6 C
-0.48 C
1996
6.7 C
-1.40 C
1998
8.7 C
+0.54 C
1999
9.3 C
+1.20 C
2003
8.5 C
+0.38 C
2004
8.5 C
+0.40 C
2005
8.8 C
+0.70 C
2006
9.0 C
+0.86 C
2007
8.8 C
+0.65 C
The fitted trend in annual mean temperature here over 1965 to 2007 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: 0.1 F (-0.3 to 0.5) per decade. The slope is a straight line fitted to 34 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Ellsworth 15 NNE
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.1 to 0.3) per decade
0.1 F (-0.3 to 0.5) per decade
1965 to 2007
34
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.3 to 0.2) per decade
-0.1 F (-0.6 to 0.4) per decade
1965 to 2007
34
Not clearly different from zero
Mean daily minimum
0.19 C (0.01 to 0.38) per decade
0.35 F (0.01 to 0.68) per decade
1965 to 2007
34
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
1963 to 2008
Yearly extremes at Ellsworth 15 NNE: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.1 C (106.0 F)
1964
38.3 C (100.9 F)
46
Coldest night (TNn)
-41.1 C (-42.0 F)
1989
-30.6 C (-23.1 F)
46
Wettest day (Rx1day)
91.4 mm (3.6 in)
1978
42.3 mm (1.7 in)
46
Wettest five days (Rx5day)
137.2 mm (5.4 in)
1999
64.9 mm (2.6 in)
46
Longest dry spell (CDD)
60 days
1964
38 days
46
Hottest day (TXx)
The hottest day of the year at Ellsworth 15 NNE, 1963 to 2008. The record is 41.1 C (106.0 F) in 1964, marked on the chart; the median year is 38.3 C (100.9 F).
Hottest day (TXx) at Ellsworth 15 NNE by year
Year
Hottest day (TXx)
1963
38.3 C (100.9 F)
1964
41.1 C (106.0 F)
1965
38.9 C (102.0 F)
1966
38.3 C (100.9 F)
1967
37.8 C (100.0 F)
1968
37.2 C (99.0 F)
1969
38.9 C (102.0 F)
1970
38.9 C (102.0 F)
1971
37.8 C (100.0 F)
1972
36.7 C (98.1 F)
1973
41.1 C (106.0 F)
1974
37.2 C (99.0 F)
1975
38.3 C (100.9 F)
1976
37.8 C (100.0 F)
1977
37.8 C (100.0 F)
1978
36.7 C (98.1 F)
1979
37.2 C (99.0 F)
1980
40.0 C (104.0 F)
1981
38.9 C (102.0 F)
1982
39.4 C (102.9 F)
1983
38.3 C (100.9 F)
1984
36.7 C (98.1 F)
1985
40.0 C (104.0 F)
1986
37.8 C (100.0 F)
1987
38.9 C (102.0 F)
1988
40.0 C (104.0 F)
1989
40.0 C (104.0 F)
1990
40.6 C (105.1 F)
1991
35.6 C (96.1 F)
1992
33.3 C (91.9 F)
1993
33.9 C (93.0 F)
1994
35.6 C (96.1 F)
1995
38.9 C (102.0 F)
1996
34.4 C (93.9 F)
1997
38.3 C (100.9 F)
1998
37.8 C (100.0 F)
1999
36.7 C (98.1 F)
2000
38.3 C (100.9 F)
2001
36.7 C (98.1 F)
2002
39.4 C (102.9 F)
2003
39.4 C (102.9 F)
2004
36.7 C (98.1 F)
2005
38.9 C (102.0 F)
2006
40.6 C (105.1 F)
2007
38.9 C (102.0 F)
2008
30.6 C (87.1 F)
Coldest night (TNn)
The coldest night of the year at Ellsworth 15 NNE, 1963 to 2008. The record is -41.1 C (-42.0 F) in 1989, marked on the chart; the median year is -30.6 C (-23.1 F).
Coldest night (TNn) at Ellsworth 15 NNE by year
Year
Coldest night (TNn)
1963
-27.2 C (-17.0 F)
1964
-31.1 C (-24.0 F)
1965
-23.9 C (-11.0 F)
1966
-29.4 C (-20.9 F)
1967
-30.6 C (-23.1 F)
1968
-31.1 C (-24.0 F)
1969
-26.7 C (-16.1 F)
1970
-30.0 C (-22.0 F)
1971
-30.0 C (-22.0 F)
1972
-32.2 C (-26.0 F)
1973
-31.7 C (-25.1 F)
1974
-32.8 C (-27.0 F)
1975
-30.6 C (-23.1 F)
1976
-28.9 C (-20.0 F)
1977
-28.3 C (-18.9 F)
1978
-30.6 C (-23.1 F)
1979
-31.1 C (-24.0 F)
1980
-28.9 C (-20.0 F)
1981
-35.6 C (-32.1 F)
1982
-33.9 C (-29.0 F)
1983
-38.3 C (-36.9 F)
1984
-32.2 C (-26.0 F)
1985
-31.1 C (-24.0 F)
1986
-30.6 C (-23.1 F)
1987
-28.3 C (-18.9 F)
1988
-33.3 C (-27.9 F)
1989
-41.1 C (-42.0 F)
1990
-36.1 C (-33.0 F)
1991
-25.6 C (-14.1 F)
1992
-23.9 C (-11.0 F)
1993
-31.1 C (-24.0 F)
1994
-30.0 C (-22.0 F)
1995
-32.8 C (-27.0 F)
1996
-35.6 C (-32.1 F)
1997
-27.2 C (-17.0 F)
1998
-31.1 C (-24.0 F)
1999
-23.3 C (-9.9 F)
2000
-31.1 C (-24.0 F)
2001
-22.8 C (-9.0 F)
2002
-21.7 C (-7.1 F)
2003
-29.4 C (-20.9 F)
2004
-30.0 C (-22.0 F)
2005
-27.8 C (-18.0 F)
2006
-35.6 C (-32.1 F)
2007
-31.1 C (-24.0 F)
2008
-26.7 C (-16.1 F)
Wettest day (Rx1day)
The wettest day of the year at Ellsworth 15 NNE, 1963 to 2008. The record is 91.4 mm (3.6 in) in 1978, marked on the chart; the median year is 42.3 mm (1.7 in).
Wettest day (Rx1day) at Ellsworth 15 NNE by year
Year
Wettest day (Rx1day)
1963
74.7 mm (2.9 in)
1964
19.8 mm (0.8 in)
1965
45.2 mm (1.8 in)
1966
68.6 mm (2.7 in)
1967
65.3 mm (2.6 in)
1968
42.4 mm (1.7 in)
1969
50.8 mm (2.0 in)
1970
38.1 mm (1.5 in)
1971
30.2 mm (1.2 in)
1972
32.5 mm (1.3 in)
1973
51.1 mm (2.0 in)
1974
31.8 mm (1.3 in)
1975
35.6 mm (1.4 in)
1976
47.5 mm (1.9 in)
1977
35.3 mm (1.4 in)
1978
91.4 mm (3.6 in)
1979
57.2 mm (2.3 in)
1980
48.5 mm (1.9 in)
1981
39.6 mm (1.6 in)
1982
64.3 mm (2.5 in)
1983
29.2 mm (1.1 in)
1984
52.8 mm (2.1 in)
1985
35.3 mm (1.4 in)
1986
55.9 mm (2.2 in)
1987
48.0 mm (1.9 in)
1988
82.8 mm (3.3 in)
1989
30.5 mm (1.2 in)
1990
22.9 mm (0.9 in)
1991
58.7 mm (2.3 in)
1992
68.6 mm (2.7 in)
1993
39.4 mm (1.6 in)
1994
39.4 mm (1.6 in)
1995
35.1 mm (1.4 in)
1996
57.2 mm (2.3 in)
1997
25.4 mm (1.0 in)
1998
47.0 mm (1.9 in)
1999
72.9 mm (2.9 in)
2000
79.8 mm (3.1 in)
2001
50.3 mm (2.0 in)
2002
25.4 mm (1.0 in)
2003
32.8 mm (1.3 in)
2004
23.6 mm (0.9 in)
2005
40.6 mm (1.6 in)
2006
42.2 mm (1.7 in)
2007
42.2 mm (1.7 in)
2008
15.7 mm (0.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Ellsworth 15 NNE, 1963 to 2008. The record is 137.2 mm (5.4 in) in 1999, marked on the chart; the median year is 64.9 mm (2.6 in).
Wettest five days (Rx5day) at Ellsworth 15 NNE by year
Year
Wettest five days (Rx5day)
1963
94.5 mm (3.7 in)
1964
52.4 mm (2.1 in)
1965
48.5 mm (1.9 in)
1966
78.8 mm (3.1 in)
1967
104.4 mm (4.1 in)
1968
107.2 mm (4.2 in)
1969
50.8 mm (2.0 in)
1970
78.3 mm (3.1 in)
1971
47.3 mm (1.9 in)
1972
55.3 mm (2.2 in)
1973
83.6 mm (3.3 in)
1974
36.1 mm (1.4 in)
1975
40.6 mm (1.6 in)
1976
52.6 mm (2.1 in)
1977
50.6 mm (2.0 in)
1978
120.3 mm (4.7 in)
1979
90.7 mm (3.6 in)
1980
54.9 mm (2.2 in)
1981
69.6 mm (2.7 in)
1982
129.6 mm (5.1 in)
1983
71.6 mm (2.8 in)
1984
59.2 mm (2.3 in)
1985
60.2 mm (2.4 in)
1986
70.8 mm (2.8 in)
1987
75.2 mm (3.0 in)
1988
94.0 mm (3.7 in)
1989
46.0 mm (1.8 in)
1990
42.1 mm (1.7 in)
1991
72.4 mm (2.9 in)
1992
87.7 mm (3.5 in)
1993
62.3 mm (2.5 in)
1994
73.7 mm (2.9 in)
1995
63.0 mm (2.5 in)
1996
82.9 mm (3.3 in)
1997
41.9 mm (1.6 in)
1998
66.8 mm (2.6 in)
1999
137.2 mm (5.4 in)
2000
79.8 mm (3.1 in)
2001
113.1 mm (4.5 in)
2002
48.3 mm (1.9 in)
2003
57.2 mm (2.3 in)
2004
33.7 mm (1.3 in)
2005
84.3 mm (3.3 in)
2006
52.1 mm (2.1 in)
2007
48.3 mm (1.9 in)
2008
37.3 mm (1.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Ellsworth 15 NNE, 1963 to 2008. The record is 60 days in 1964, marked on the chart; the median year is 38 days.
Longest dry spell (CDD) at Ellsworth 15 NNE by year
Year
Longest dry spell (CDD)
1963
26 days
1964
60 days
1965
37 days
1966
42 days
1967
35 days
1968
44 days
1969
60 days
1970
57 days
1971
45 days
1972
40 days
1973
43 days
1974
41 days
1975
26 days
1976
44 days
1977
38 days
1978
34 days
1979
38 days
1980
45 days
1981
46 days
1982
42 days
1983
35 days
1984
29 days
1985
53 days
1986
35 days
1987
35 days
1988
23 days
1989
33 days
1990
20 days
1991
31 days
1992
39 days
1993
22 days
1994
28 days
1995
24 days
1996
23 days
1997
43 days
1998
38 days
1999
34 days
2000
32 days
2001
40 days
2002
53 days
2003
33 days
2004
30 days
2005
46 days
2006
60 days
2007
30 days
2008
22 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
34 years with a frost
Across 34 years with a frost, the median last spring frost at Ellsworth 15 NNE falls on 15 May and the median first autumn frost on 19 September, which leaves a median of 130 days between them.
Fitted over all years, the growing season changes by +1.9 days per decade at this station.
Frost dates and growing season at Ellsworth 15 NNE
Measure
Median, all years
Earliest period
Recent period (1969 to 2007)
Recent against earliest
Fitted trend
Last spring frost
15 May
n/a
14 May
n/a
-0.6 days per decade
First autumn frost
19 September
n/a
19 September
n/a
+1.4 days per decade
Growing days
130 days
n/a
128 days
n/a
+1.9 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
43 years, 1964 to 2007
A day with at least 42.8 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 96.0 mm (3.8 in) of rain is expected about once in 100 years.
Rainfall return levels at Ellsworth 15 NNE: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
42.8 mm (1.7 in)
5 years
57.6 mm (2.3 in)
10 years
67.2 mm (2.6 in)
25 years
79.0 mm (3.1 in)
50 years
87.6 mm (3.4 in)
Longer than the 43 years of record
100 years
96.0 mm (3.8 in)
Longer than the 43 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, 43 years of values from 1964 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: 91.4 mm (3.6 in) in 1978; 79.8 mm (3.1 in) in 2000; 72.9 mm (2.9 in) in 1999.
Download the Data
Data for Ellsworth 15 NNE standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ellsworth 15 NNE 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.