Record envelope, standing records and threshold days for Rolla 1NE (USC00327664), North Dakota, United States, with 106 years of record.
Key Facts for Rolla 1NE
Rolla 1NE (USC00327664) is a weather station in North Dakota, United States at 48.88 latitude and -99.59 longitude, 559 m (1,833 ft) above sea level.
The station reports from 1904 to 2009, 106 years of record.
1,464 records set at Rolla 1NE still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Rolla 1NE tied a daily record low maximum temperature of 15.6 C (60.1 F) on 16 July 2009.
About the Station
Location: North Dakota, United States, 48.88 latitude, -99.59 longitude.
Elevation: 559 m (1,833 ft).
Period of record: 1904 to 2009, 106 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 Rolla 1NE. 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 Rolla 1NE, 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)
-40.0 C (-40.0 F)
n/a
n/a
Feb
14.4 C (57.9 F)
-41.7 C (-43.1 F)
n/a
n/a
Mar
23.9 C (75.0 F)
-35.0 C (-31.0 F)
n/a
n/a
Apr
34.4 C (93.9 F)
-22.8 C (-9.0 F)
n/a
n/a
May
34.4 C (93.9 F)
-11.7 C (10.9 F)
n/a
n/a
Jun
36.1 C (97.0 F)
-1.7 C (28.9 F)
n/a
n/a
Jul
37.8 C (100.0 F)
2.2 C (36.0 F)
n/a
n/a
Aug
38.3 C (100.9 F)
0.6 C (33.1 F)
n/a
n/a
Sep
36.7 C (98.1 F)
-8.3 C (17.1 F)
n/a
n/a
Oct
32.2 C (90.0 F)
-18.3 C (-0.9 F)
n/a
n/a
Nov
23.9 C (75.0 F)
-31.1 C (-24.0 F)
n/a
n/a
Dec
17.8 C (64.0 F)
-38.3 C (-36.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Rolla 1NE still stand. 1939 holds the most, with 41.
Standing records at Rolla 1NE by the year they were set
Year set
Standing records
1904
20
1905
23
1906
14
1937
5
1938
20
1939
41
1940
19
1941
20
1942
27
1943
17
1944
14
1945
24
1946
25
1947
25
1948
16
1949
18
1950
25
1951
18
1952
21
1953
16
1954
19
1955
12
1956
19
1957
11
1958
20
1959
15
1960
6
1961
18
1962
24
1963
25
1964
20
1965
18
1966
31
1967
25
1968
24
1969
24
1970
8
1971
11
1972
23
1973
13
1974
17
1975
10
1976
14
1977
31
1978
9
1979
20
1980
25
1981
18
1982
13
1983
23
1984
18
1985
25
1986
20
1987
19
1988
35
1989
34
1990
15
1991
36
1992
32
1993
19
1994
21
1995
16
1996
18
1997
22
1998
11
1999
17
2000
17
2001
14
2002
16
2003
33
2004
14
2005
17
2006
8
2007
13
2008
10
2009
10
All-Time Record Progression
5 new records
5 all-time records were set at Rolla 1NE between 14 March 1971 and 2 February 1996. Each dot is a new record.
When Rolla 1NE set new all-time records
Date
Kind
Detail
1971-03-14
Record daily snowfall
Record daily snowfall 39.6 cm (15.6 in)
1989-01-07
Record daily snowfall
Record daily snowfall 40.6 cm (16.0 in)
1996-02-01
Record low minimum temperature
Record low minimum temperature -40.6 C (-41.1 F)
1996-02-02
Record low maximum temperature
Record low maximum temperature -34.4 C (-29.9 F)
1996-02-02
Record low minimum temperature
Record low minimum temperature -41.7 C (-43.1 F)
Wettest Day of Each Month
Sep: 162.6 mm (6.4 in)
The wettest day on record for each calendar month at Rolla 1NE. The most was 162.6 mm (6.4 in) on 14 September 1905.
Record daily precipitation for each month at Rolla 1NE
Month
Record daily precipitation (mm)
Date
Jan
27.4 mm (1.1 in)
7 January 1989
Feb
21.1 mm (0.8 in)
28 February 1974
Mar
51.3 mm (2.0 in)
14 March 1971
Apr
60.2 mm (2.4 in)
28 April 1991
May
66.0 mm (2.6 in)
23 May 1981
Jun
83.6 mm (3.3 in)
7 June 1954
Jul
107.4 mm (4.2 in)
11 July 1943
Aug
83.6 mm (3.3 in)
24 August 1968
Sep
162.6 mm (6.4 in)
14 September 1905
Oct
54.4 mm (2.1 in)
7 October 1994
Nov
38.1 mm (1.5 in)
2 November 2000
Dec
24.4 mm (1.0 in)
2 December 1982
Period of Record Coverage
1904 to 2009
Complete yearUnder 90 percent of days
76 years of record at Rolla 1NE, 1904 to 2009. 6 years have data for under 90 percent of days and are left out of rankings: 1904, 1906, 1937, 1975, 2008, 2009.
Cooler than the station meanWarmer than the station mean
One stripe for each of 68 complete years at Rolla 1NE, 1905 to 2007. Blue stripes are years cooler than the station's own mean of 3.0 C (37.4 F); red stripes are warmer. The coolest year was 1950, at 0.2 C (32.3 F), and the warmest was 1987, at 5.5 C (41.8 F). The strongest colour marks a difference of 2.9 C (5.2 F).
Annual mean temperature at Rolla 1NE as warming stripes, 1905 to 2007
Year
Annual mean temperature
Difference from the station mean
1905
2.9 C
-0.15 C
1938
4.3 C
+1.25 C
1939
4.1 C
+1.07 C
1940
3.5 C
+0.44 C
1941
4.2 C
+1.19 C
1942
3.7 C
+0.68 C
1944
3.7 C
+0.70 C
1945
2.2 C
-0.80 C
1946
3.1 C
+0.03 C
1947
3.3 C
+0.29 C
1948
2.7 C
-0.29 C
1949
2.6 C
-0.46 C
1950
0.2 C
-2.85 C
1951
1.1 C
-1.97 C
1952
4.0 C
+0.95 C
1953
4.5 C
+1.48 C
1954
3.4 C
+0.37 C
1955
2.1 C
-0.94 C
1956
2.5 C
-0.53 C
1957
3.2 C
+0.17 C
1958
3.7 C
+0.62 C
1959
3.0 C
-0.06 C
1960
3.2 C
+0.15 C
1961
3.9 C
+0.90 C
1962
3.1 C
+0.06 C
1963
4.3 C
+1.22 C
1964
3.1 C
+0.03 C
1965
2.2 C
-0.80 C
1966
2.0 C
-1.01 C
1967
2.7 C
-0.36 C
1968
3.0 C
+0.00 C
1969
2.5 C
-0.50 C
1970
2.1 C
-0.96 C
1971
2.9 C
-0.12 C
1972
1.5 C
-1.50 C
1973
3.7 C
+0.71 C
1974
2.0 C
-1.06 C
1976
3.2 C
+0.21 C
1977
3.8 C
+0.77 C
1978
2.2 C
-0.88 C
1979
1.2 C
-1.86 C
1980
3.0 C
-0.06 C
1981
4.1 C
+1.11 C
1983
2.9 C
-0.18 C
1984
3.0 C
-0.01 C
1985
1.6 C
-1.43 C
1986
3.3 C
+0.23 C
1987
5.5 C
+2.43 C
1988
4.1 C
+1.06 C
1989
2.4 C
-0.62 C
1990
3.5 C
+0.49 C
1991
3.4 C
+0.38 C
1992
3.0 C
-0.05 C
1993
2.1 C
-0.94 C
1994
2.7 C
-0.34 C
1995
2.1 C
-0.89 C
1996
0.6 C
-2.39 C
1997
3.1 C
+0.04 C
1998
4.3 C
+1.27 C
1999
4.0 C
+0.99 C
2000
3.2 C
+0.18 C
2001
4.1 C
+1.10 C
2002
2.9 C
-0.11 C
2003
3.3 C
+0.31 C
2004
2.3 C
-0.73 C
2005
3.7 C
+0.65 C
2006
4.3 C
+1.25 C
2007
2.8 C
-0.20 C
The fitted trend in annual mean temperature here over 1905 to 2007 is 0.00 C (-0.11 to 0.11) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.00 F (-0.20 to 0.19) per decade. The slope is a straight line fitted to 68 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Rolla 1NE
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.00 C (-0.11 to 0.11) per decade
0.00 F (-0.20 to 0.19) per decade
1905 to 2007
68
Not clearly different from zero
Mean daily maximum
-0.2 C (-0.3 to -0.1) per decade
-0.3 F (-0.5 to -0.1) per decade
1905 to 2007
68
Fall
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.3 F (0.1 to 0.5) per decade
1905 to 2007
68
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
1904 to 2009
Yearly extremes at Rolla 1NE: 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)
1949
34.2 C (93.5 F)
76
Coldest night (TNn)
-41.7 C (-43.1 F)
1996
-34.4 C (-29.9 F)
76
Wettest day (Rx1day)
162.6 mm (6.4 in)
1905
44.9 mm (1.8 in)
76
Wettest five days (Rx5day)
165.6 mm (6.5 in)
1905
66.6 mm (2.6 in)
76
Longest dry spell (CDD)
74 days
1980
31 days
76
Hottest day (TXx)
The hottest day of the year at Rolla 1NE, 1904 to 2009. The record is 38.3 C (100.9 F) in 1949, marked on the chart; the median year is 34.2 C (93.5 F).
Hottest day (TXx) at Rolla 1NE by year
Year
Hottest day (TXx)
1904
31.7 C (89.1 F)
1905
32.2 C (90.0 F)
1906
33.9 C (93.0 F)
1937
23.9 C (75.0 F)
1938
35.0 C (95.0 F)
1939
37.2 C (99.0 F)
1940
35.0 C (95.0 F)
1941
35.6 C (96.1 F)
1942
34.4 C (93.9 F)
1943
32.2 C (90.0 F)
1944
34.4 C (93.9 F)
1945
35.0 C (95.0 F)
1946
37.8 C (100.0 F)
1947
37.2 C (99.0 F)
1948
34.4 C (93.9 F)
1949
38.3 C (100.9 F)
1950
32.2 C (90.0 F)
1951
36.1 C (97.0 F)
1952
35.0 C (95.0 F)
1953
33.9 C (93.0 F)
1954
32.2 C (90.0 F)
1955
35.0 C (95.0 F)
1956
33.9 C (93.0 F)
1957
35.6 C (96.1 F)
1958
35.0 C (95.0 F)
1959
37.2 C (99.0 F)
1960
37.8 C (100.0 F)
1961
36.1 C (97.0 F)
1962
32.2 C (90.0 F)
1963
34.4 C (93.9 F)
1964
37.2 C (99.0 F)
1965
34.4 C (93.9 F)
1966
32.8 C (91.0 F)
1967
35.6 C (96.1 F)
1968
35.0 C (95.0 F)
1969
35.6 C (96.1 F)
1970
35.6 C (96.1 F)
1971
36.1 C (97.0 F)
1972
33.9 C (93.0 F)
1973
33.3 C (91.9 F)
1974
33.3 C (91.9 F)
1975
36.7 C (98.1 F)
1976
36.7 C (98.1 F)
1977
34.4 C (93.9 F)
1978
35.6 C (96.1 F)
1979
35.0 C (95.0 F)
1980
34.4 C (93.9 F)
1981
32.2 C (90.0 F)
1982
29.4 C (84.9 F)
1983
35.6 C (96.1 F)
1984
34.4 C (93.9 F)
1985
31.1 C (88.0 F)
1986
32.8 C (91.0 F)
1987
33.3 C (91.9 F)
1988
37.8 C (100.0 F)
1989
36.1 C (97.0 F)
1990
31.7 C (89.1 F)
1991
33.3 C (91.9 F)
1992
32.2 C (90.0 F)
1993
31.1 C (88.0 F)
1994
31.7 C (89.1 F)
1995
33.3 C (91.9 F)
1996
31.1 C (88.0 F)
1997
30.6 C (87.1 F)
1998
30.6 C (87.1 F)
1999
30.6 C (87.1 F)
2000
32.2 C (90.0 F)
2001
33.3 C (91.9 F)
2002
31.7 C (89.1 F)
2003
33.9 C (93.0 F)
2004
28.3 C (82.9 F)
2005
31.1 C (88.0 F)
2006
33.9 C (93.0 F)
2007
35.6 C (96.1 F)
2008
31.7 C (89.1 F)
2009
28.3 C (82.9 F)
Coldest night (TNn)
The coldest night of the year at Rolla 1NE, 1904 to 2009. The record is -41.7 C (-43.1 F) in 1996, marked on the chart; the median year is -34.4 C (-29.9 F).
Coldest night (TNn) at Rolla 1NE by year
Year
Coldest night (TNn)
1904
-32.8 C (-27.0 F)
1905
-36.7 C (-34.1 F)
1906
-32.8 C (-27.0 F)
1937
-31.7 C (-25.1 F)
1938
-36.1 C (-33.0 F)
1939
-38.9 C (-38.0 F)
1940
-31.7 C (-25.1 F)
1941
-33.9 C (-29.0 F)
1942
-35.0 C (-31.0 F)
1943
-39.4 C (-38.9 F)
1944
-31.7 C (-25.1 F)
1945
-34.4 C (-29.9 F)
1946
-34.4 C (-29.9 F)
1947
-34.4 C (-29.9 F)
1948
-34.4 C (-29.9 F)
1949
-39.4 C (-38.9 F)
1950
-40.0 C (-40.0 F)
1951
-38.9 C (-38.0 F)
1952
-34.4 C (-29.9 F)
1953
-32.8 C (-27.0 F)
1954
-36.7 C (-34.1 F)
1955
-33.3 C (-27.9 F)
1956
-32.2 C (-26.0 F)
1957
-34.4 C (-29.9 F)
1958
-33.3 C (-27.9 F)
1959
-32.8 C (-27.0 F)
1960
-33.9 C (-29.0 F)
1961
-35.6 C (-32.1 F)
1962
-37.2 C (-35.0 F)
1963
-35.0 C (-31.0 F)
1964
-30.0 C (-22.0 F)
1965
-32.8 C (-27.0 F)
1966
-38.9 C (-38.0 F)
1967
-38.3 C (-36.9 F)
1968
-37.8 C (-36.0 F)
1969
-33.3 C (-27.9 F)
1970
-38.3 C (-36.9 F)
1971
-37.8 C (-36.0 F)
1972
-37.8 C (-36.0 F)
1973
-33.3 C (-27.9 F)
1974
-33.9 C (-29.0 F)
1975
-32.8 C (-27.0 F)
1976
-33.9 C (-29.0 F)
1977
-34.4 C (-29.9 F)
1978
-31.1 C (-24.0 F)
1979
-35.6 C (-32.1 F)
1980
-33.3 C (-27.9 F)
1981
-32.2 C (-26.0 F)
1982
-35.6 C (-32.1 F)
1983
-38.3 C (-36.9 F)
1984
-32.2 C (-26.0 F)
1985
-37.2 C (-35.0 F)
1986
-31.1 C (-24.0 F)
1987
-34.4 C (-29.9 F)
1988
-35.0 C (-31.0 F)
1989
-39.4 C (-38.9 F)
1990
-34.4 C (-29.9 F)
1991
-33.9 C (-29.0 F)
1992
-32.8 C (-27.0 F)
1993
-31.7 C (-25.1 F)
1994
-36.1 C (-33.0 F)
1995
-31.1 C (-24.0 F)
1996
-41.7 C (-43.1 F)
1997
-33.3 C (-27.9 F)
1998
-33.9 C (-29.0 F)
1999
-32.2 C (-26.0 F)
2000
-32.8 C (-27.0 F)
2001
-30.6 C (-23.1 F)
2002
-27.8 C (-18.0 F)
2003
-32.8 C (-27.0 F)
2004
-36.7 C (-34.1 F)
2005
-35.0 C (-31.0 F)
2006
-36.1 C (-33.0 F)
2007
-33.9 C (-29.0 F)
2008
-34.4 C (-29.9 F)
2009
-33.9 C (-29.0 F)
Wettest day (Rx1day)
The wettest day of the year at Rolla 1NE, 1904 to 2009. The record is 162.6 mm (6.4 in) in 1905, marked on the chart; the median year is 44.9 mm (1.8 in).
Wettest day (Rx1day) at Rolla 1NE by year
Year
Wettest day (Rx1day)
1904
53.3 mm (2.1 in)
1905
162.6 mm (6.4 in)
1906
55.9 mm (2.2 in)
1937
33.5 mm (1.3 in)
1938
37.1 mm (1.5 in)
1939
33.5 mm (1.3 in)
1940
31.8 mm (1.3 in)
1941
62.7 mm (2.5 in)
1942
31.2 mm (1.2 in)
1943
107.4 mm (4.2 in)
1944
58.7 mm (2.3 in)
1945
39.4 mm (1.6 in)
1946
46.7 mm (1.8 in)
1947
42.9 mm (1.7 in)
1948
39.4 mm (1.6 in)
1949
24.9 mm (1.0 in)
1950
52.8 mm (2.1 in)
1951
62.0 mm (2.4 in)
1952
65.3 mm (2.6 in)
1953
48.5 mm (1.9 in)
1954
83.6 mm (3.3 in)
1955
40.1 mm (1.6 in)
1956
31.5 mm (1.2 in)
1957
79.8 mm (3.1 in)
1958
23.1 mm (0.9 in)
1959
56.1 mm (2.2 in)
1960
45.7 mm (1.8 in)
1961
39.4 mm (1.6 in)
1962
37.6 mm (1.5 in)
1963
40.1 mm (1.6 in)
1964
37.6 mm (1.5 in)
1965
91.2 mm (3.6 in)
1966
75.9 mm (3.0 in)
1967
29.5 mm (1.2 in)
1968
83.6 mm (3.3 in)
1969
29.2 mm (1.1 in)
1970
43.7 mm (1.7 in)
1971
51.3 mm (2.0 in)
1972
39.9 mm (1.6 in)
1973
42.7 mm (1.7 in)
1974
35.3 mm (1.4 in)
1975
39.9 mm (1.6 in)
1976
44.5 mm (1.8 in)
1977
53.6 mm (2.1 in)
1978
42.7 mm (1.7 in)
1979
39.1 mm (1.5 in)
1980
71.1 mm (2.8 in)
1981
66.0 mm (2.6 in)
1982
46.2 mm (1.8 in)
1983
45.2 mm (1.8 in)
1984
28.4 mm (1.1 in)
1985
41.1 mm (1.6 in)
1986
50.8 mm (2.0 in)
1987
69.3 mm (2.7 in)
1988
25.4 mm (1.0 in)
1989
27.4 mm (1.1 in)
1990
39.4 mm (1.6 in)
1991
60.2 mm (2.4 in)
1992
28.4 mm (1.1 in)
1993
51.8 mm (2.0 in)
1994
54.4 mm (2.1 in)
1995
25.7 mm (1.0 in)
1996
50.8 mm (2.0 in)
1997
53.1 mm (2.1 in)
1998
54.6 mm (2.1 in)
1999
33.0 mm (1.3 in)
2000
47.2 mm (1.9 in)
2001
63.5 mm (2.5 in)
2002
50.8 mm (2.0 in)
2003
50.0 mm (2.0 in)
2004
40.1 mm (1.6 in)
2005
45.2 mm (1.8 in)
2006
21.6 mm (0.9 in)
2007
55.1 mm (2.2 in)
2008
40.6 mm (1.6 in)
2009
40.6 mm (1.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Rolla 1NE, 1904 to 2009. The record is 165.6 mm (6.5 in) in 1905, marked on the chart; the median year is 66.6 mm (2.6 in).
Wettest five days (Rx5day) at Rolla 1NE by year
Year
Wettest five days (Rx5day)
1904
73.1 mm (2.9 in)
1905
165.6 mm (6.5 in)
1906
87.9 mm (3.5 in)
1937
40.4 mm (1.6 in)
1938
44.0 mm (1.7 in)
1939
42.2 mm (1.7 in)
1940
45.7 mm (1.8 in)
1941
112.2 mm (4.4 in)
1942
65.5 mm (2.6 in)
1943
129.0 mm (5.1 in)
1944
91.8 mm (3.6 in)
1945
81.7 mm (3.2 in)
1946
53.3 mm (2.1 in)
1947
73.4 mm (2.9 in)
1948
90.0 mm (3.5 in)
1949
44.2 mm (1.7 in)
1950
60.2 mm (2.4 in)
1951
67.1 mm (2.6 in)
1952
94.5 mm (3.7 in)
1953
67.3 mm (2.6 in)
1954
163.8 mm (6.4 in)
1955
69.6 mm (2.7 in)
1956
49.1 mm (1.9 in)
1957
100.5 mm (4.0 in)
1958
63.5 mm (2.5 in)
1959
86.3 mm (3.4 in)
1960
66.3 mm (2.6 in)
1961
55.7 mm (2.2 in)
1962
72.1 mm (2.8 in)
1963
59.2 mm (2.3 in)
1964
86.6 mm (3.4 in)
1965
121.7 mm (4.8 in)
1966
90.4 mm (3.6 in)
1967
49.0 mm (1.9 in)
1968
100.9 mm (4.0 in)
1969
73.4 mm (2.9 in)
1970
62.3 mm (2.5 in)
1971
59.2 mm (2.3 in)
1972
46.3 mm (1.8 in)
1973
93.2 mm (3.7 in)
1974
68.8 mm (2.7 in)
1975
76.7 mm (3.0 in)
1976
65.0 mm (2.6 in)
1977
81.3 mm (3.2 in)
1978
57.7 mm (2.3 in)
1979
54.4 mm (2.1 in)
1980
92.2 mm (3.6 in)
1981
80.2 mm (3.2 in)
1982
60.2 mm (2.4 in)
1983
58.8 mm (2.3 in)
1984
53.6 mm (2.1 in)
1985
66.2 mm (2.6 in)
1986
54.6 mm (2.1 in)
1987
75.2 mm (3.0 in)
1988
38.1 mm (1.5 in)
1989
52.1 mm (2.1 in)
1990
63.8 mm (2.5 in)
1991
76.5 mm (3.0 in)
1992
37.1 mm (1.5 in)
1993
80.7 mm (3.2 in)
1994
64.9 mm (2.6 in)
1995
50.4 mm (2.0 in)
1996
67.8 mm (2.7 in)
1997
60.7 mm (2.4 in)
1998
68.6 mm (2.7 in)
1999
63.8 mm (2.5 in)
2000
66.8 mm (2.6 in)
2001
98.8 mm (3.9 in)
2002
97.8 mm (3.9 in)
2003
59.5 mm (2.3 in)
2004
72.6 mm (2.9 in)
2005
119.1 mm (4.7 in)
2006
22.4 mm (0.9 in)
2007
55.1 mm (2.2 in)
2008
50.8 mm (2.0 in)
2009
40.6 mm (1.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Rolla 1NE, 1904 to 2009. The record is 74 days in 1980, marked on the chart; the median year is 31 days.
Longest dry spell (CDD) at Rolla 1NE by year
Year
Longest dry spell (CDD)
1904
28 days
1905
36 days
1906
43 days
1937
13 days
1938
48 days
1939
34 days
1940
23 days
1941
21 days
1942
35 days
1943
33 days
1944
28 days
1945
20 days
1946
21 days
1947
20 days
1948
31 days
1949
24 days
1950
26 days
1951
26 days
1952
46 days
1953
26 days
1954
33 days
1955
27 days
1956
26 days
1957
21 days
1958
31 days
1959
39 days
1960
34 days
1961
55 days
1962
24 days
1963
33 days
1964
30 days
1965
55 days
1966
56 days
1967
25 days
1968
45 days
1969
52 days
1970
21 days
1971
38 days
1972
37 days
1973
43 days
1974
49 days
1975
16 days
1976
59 days
1977
54 days
1978
31 days
1979
23 days
1980
74 days
1981
28 days
1982
27 days
1983
26 days
1984
22 days
1985
22 days
1986
32 days
1987
38 days
1988
34 days
1989
33 days
1990
27 days
1991
18 days
1992
31 days
1993
29 days
1994
20 days
1995
17 days
1996
29 days
1997
25 days
1998
28 days
1999
33 days
2000
41 days
2001
32 days
2002
33 days
2003
36 days
2004
42 days
2005
43 days
2006
24 days
2007
47 days
2008
66 days
2009
39 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
68 years with a frost
Across 68 years with a frost, the median last spring frost at Rolla 1NE falls on 19 May and the median first autumn frost on 22 September, which leaves a median of 126 days between them.
In 1977 to 2007 the median growing season was 132 days. That is 13 days more than in 1905 to 1967.
Fitted over all years, the growing season changes by +2.3 days per decade at this station.
Frost dates and growing season at Rolla 1NE
Measure
Median, all years
Earliest period (1905 to 1967)
Recent period (1977 to 2007)
Recent against earliest
Fitted trend
Last spring frost
19 May
23 May
17 May
6 days earlier
-0.8 days per decade
First autumn frost
22 September
19 September
28 September
9 days later
+1.5 days per decade
Growing days
126 days
119 days
132 days
13 days more
+2.3 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
71 years, 1905 to 2007
A day with at least 44.3 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 126.7 mm (5.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Rolla 1NE: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
44.3 mm (1.7 in)
5 years
61.3 mm (2.4 in)
10 years
74.4 mm (2.9 in)
25 years
93.2 mm (3.7 in)
50 years
109.1 mm (4.3 in)
100 years
126.7 mm (5.0 in)
Longer than the 71 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, 71 years of values from 1905 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: 162.6 mm (6.4 in) in 1905; 107.4 mm (4.2 in) in 1943; 91.2 mm (3.6 in) in 1965.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Rolla 1NE standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Rolla 1NE 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.