Record envelope, standing records and threshold days for Rudyard 27 N (USC00247250), Montana, United States, with 39 years of record.
Key Facts for Rudyard 27 N
Rudyard 27 N (USC00247250) is a weather station in Montana, United States at 48.94 latitude and -110.57 longitude, 917 m (3,010 ft) above sea level.
The station reports from 1960 to 1998, 39 years of record.
1,464 records set at Rudyard 27 N still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Rudyard 27 N set a daily record snowfall of 6.4 cm (2.5 in) on 28 December 1998.
About the Station
Location: Montana, United States, 48.94 latitude, -110.57 longitude.
Elevation: 917 m (3,010 ft).
Period of record: 1960 to 1998, 39 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 Rudyard 27 N. 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 Rudyard 27 N, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
16.7 C (62.1 F)
-40.0 C (-40.0 F)
n/a
n/a
Feb
22.2 C (72.0 F)
-38.3 C (-36.9 F)
n/a
n/a
Mar
23.9 C (75.0 F)
-32.2 C (-26.0 F)
n/a
n/a
Apr
31.1 C (88.0 F)
-23.3 C (-9.9 F)
n/a
n/a
May
33.9 C (93.0 F)
-7.8 C (18.0 F)
n/a
n/a
Jun
38.3 C (100.9 F)
-2.2 C (28.0 F)
n/a
n/a
Jul
38.9 C (102.0 F)
2.8 C (37.0 F)
n/a
n/a
Aug
41.1 C (106.0 F)
0.0 C (32.0 F)
n/a
n/a
Sep
37.8 C (100.0 F)
-8.9 C (16.0 F)
n/a
n/a
Oct
31.7 C (89.1 F)
-26.7 C (-16.1 F)
n/a
n/a
Nov
22.8 C (73.0 F)
-31.7 C (-25.1 F)
n/a
n/a
Dec
17.2 C (63.0 F)
-41.7 C (-43.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Rudyard 27 N still stand. 1992 holds the most, with 59.
Standing records at Rudyard 27 N by the year they were set
Year set
Standing records
1960
6
1961
45
1962
48
1963
53
1964
32
1965
51
1966
39
1967
52
1968
47
1969
57
1970
28
1971
33
1972
56
1973
45
1974
26
1975
47
1976
34
1977
39
1978
24
1979
37
1980
35
1981
25
1982
26
1983
27
1984
45
1985
58
1986
51
1987
57
1988
48
1989
34
1990
20
1991
28
1992
59
1993
31
1994
21
1995
18
1996
38
1997
35
1998
9
Wettest Day of Each Month
Sep: 63.5 mm (2.5 in)
The wettest day on record for each calendar month at Rudyard 27 N. The most was 63.5 mm (2.5 in) on 25 September 1986.
Record daily precipitation for each month at Rudyard 27 N
Month
Record daily precipitation (mm)
Date
Jan
17.8 mm (0.7 in)
7 January 1969
Feb
12.7 mm (0.5 in)
2 February 1982
Mar
19.1 mm (0.8 in)
16 March 1982
Apr
33.0 mm (1.3 in)
26 April 1989
May
54.9 mm (2.2 in)
26 May 1997
Jun
56.4 mm (2.2 in)
6 June 1995
Jul
38.1 mm (1.5 in)
29 July 1987
Aug
50.8 mm (2.0 in)
15 August 1968
Sep
63.5 mm (2.5 in)
25 September 1986
Oct
22.6 mm (0.9 in)
12 October 1994
Nov
23.6 mm (0.9 in)
3 November 1989
Dec
17.8 mm (0.7 in)
27 December 1989
Period of Record Coverage
1960 to 1998
Complete yearUnder 90 percent of days
39 years of record at Rudyard 27 N, 1960 to 1998. 15 years have data for under 90 percent of days and are left out of rankings: 1960, 1965, 1968, 1978, 1980, 1981, 1982, 1983 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 27 complete years at Rudyard 27 N, 1961 to 1997. Blue stripes are years cooler than the station's own mean of 5.8 C (42.5 F); red stripes are warmer. The coolest year was 1969, at 3.8 C (38.9 F), and the warmest was 1987, at 8.3 C (46.9 F). The strongest colour marks a difference of 2.5 C (4.5 F).
Annual mean temperature at Rudyard 27 N as warming stripes, 1961 to 1997
Year
Annual mean temperature
Difference from the station mean
1961
7.1 C
+1.21 C
1962
6.8 C
+0.96 C
1963
7.3 C
+1.48 C
1964
5.4 C
-0.47 C
1966
4.7 C
-1.17 C
1967
5.4 C
-0.49 C
1969
3.8 C
-2.03 C
1970
4.4 C
-1.44 C
1971
4.8 C
-1.05 C
1972
4.4 C
-1.46 C
1973
5.8 C
+0.00 C
1974
6.0 C
+0.17 C
1976
7.2 C
+1.32 C
1977
6.6 C
+0.77 C
1978
4.3 C
-1.53 C
1979
5.2 C
-0.63 C
1981
7.3 C
+1.48 C
1983
6.4 C
+0.54 C
1985
4.9 C
-0.99 C
1986
7.0 C
+1.13 C
1987
8.3 C
+2.43 C
1988
7.6 C
+1.75 C
1989
5.4 C
-0.42 C
1993
4.7 C
-1.13 C
1994
6.6 C
+0.71 C
1996
4.1 C
-1.79 C
1997
6.5 C
+0.61 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1960 to 1998
Yearly extremes at Rudyard 27 N: 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)
1961
36.7 C (98.1 F)
39
Coldest night (TNn)
-41.7 C (-43.1 F)
1983
-33.9 C (-29.0 F)
39
Wettest day (Rx1day)
63.5 mm (2.5 in)
1986
31.8 mm (1.3 in)
39
Wettest five days (Rx5day)
118.2 mm (4.7 in)
1990
47.9 mm (1.9 in)
39
Longest dry spell (CDD)
87 days
1968
43 days
39
Hottest day (TXx)
The hottest day of the year at Rudyard 27 N, 1960 to 1998. The record is 41.1 C (106.0 F) in 1961, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Rudyard 27 N by year
Year
Hottest day (TXx)
1960
12.8 C (55.0 F)
1961
41.1 C (106.0 F)
1962
33.9 C (93.0 F)
1963
38.3 C (100.9 F)
1964
38.9 C (102.0 F)
1965
35.6 C (96.1 F)
1966
35.0 C (95.0 F)
1967
37.2 C (99.0 F)
1968
36.7 C (98.1 F)
1969
40.6 C (105.1 F)
1970
37.2 C (99.0 F)
1971
38.3 C (100.9 F)
1972
36.1 C (97.0 F)
1973
38.9 C (102.0 F)
1974
36.7 C (98.1 F)
1975
38.3 C (100.9 F)
1976
36.1 C (97.0 F)
1977
35.6 C (96.1 F)
1978
35.6 C (96.1 F)
1979
37.2 C (99.0 F)
1980
36.1 C (97.0 F)
1981
36.1 C (97.0 F)
1982
34.4 C (93.9 F)
1983
41.1 C (106.0 F)
1984
38.3 C (100.9 F)
1985
37.8 C (100.0 F)
1986
33.9 C (93.0 F)
1987
35.6 C (96.1 F)
1988
37.2 C (99.0 F)
1989
36.7 C (98.1 F)
1990
39.4 C (102.9 F)
1991
38.3 C (100.9 F)
1992
36.1 C (97.0 F)
1993
33.9 C (93.0 F)
1994
36.7 C (98.1 F)
1995
32.2 C (90.0 F)
1996
36.7 C (98.1 F)
1997
37.2 C (99.0 F)
1998
28.9 C (84.0 F)
Coldest night (TNn)
The coldest night of the year at Rudyard 27 N, 1960 to 1998. The record is -41.7 C (-43.1 F) in 1983, marked on the chart; the median year is -33.9 C (-29.0 F).
Coldest night (TNn) at Rudyard 27 N by year
Year
Coldest night (TNn)
1960
-28.9 C (-20.0 F)
1961
-32.8 C (-27.0 F)
1962
-35.0 C (-31.0 F)
1963
-33.9 C (-29.0 F)
1964
-40.0 C (-40.0 F)
1965
-31.7 C (-25.1 F)
1966
-32.2 C (-26.0 F)
1967
-28.9 C (-20.0 F)
1968
-38.9 C (-38.0 F)
1969
-40.0 C (-40.0 F)
1970
-35.6 C (-32.1 F)
1971
-34.4 C (-29.9 F)
1972
-40.0 C (-40.0 F)
1973
-30.0 C (-22.0 F)
1974
-37.8 C (-36.0 F)
1975
-32.2 C (-26.0 F)
1976
-31.7 C (-25.1 F)
1977
-35.6 C (-32.1 F)
1978
-30.0 C (-22.0 F)
1979
-36.1 C (-33.0 F)
1980
-32.2 C (-26.0 F)
1981
-31.1 C (-24.0 F)
1982
-37.2 C (-35.0 F)
1983
-41.7 C (-43.1 F)
1984
-33.9 C (-29.0 F)
1985
-35.0 C (-31.0 F)
1986
-29.4 C (-20.9 F)
1987
-25.0 C (-13.0 F)
1988
-28.3 C (-18.9 F)
1989
-38.9 C (-38.0 F)
1990
-32.8 C (-27.0 F)
1991
-26.7 C (-16.1 F)
1992
-25.0 C (-13.0 F)
1993
-33.3 C (-27.9 F)
1994
-35.0 C (-31.0 F)
1995
-27.8 C (-18.0 F)
1996
-38.9 C (-38.0 F)
1997
-37.8 C (-36.0 F)
1998
-36.7 C (-34.1 F)
Wettest day (Rx1day)
The wettest day of the year at Rudyard 27 N, 1960 to 1998. The record is 63.5 mm (2.5 in) in 1986, marked on the chart; the median year is 31.8 mm (1.3 in).
Wettest day (Rx1day) at Rudyard 27 N by year
Year
Wettest day (Rx1day)
1960
3.3 mm (0.13 in)
1961
19.1 mm (0.8 in)
1962
40.6 mm (1.6 in)
1963
36.1 mm (1.4 in)
1964
26.2 mm (1.0 in)
1965
32.5 mm (1.3 in)
1966
38.6 mm (1.5 in)
1967
31.8 mm (1.3 in)
1968
50.8 mm (2.0 in)
1969
17.8 mm (0.7 in)
1970
37.8 mm (1.5 in)
1971
27.9 mm (1.1 in)
1972
25.4 mm (1.0 in)
1973
17.8 mm (0.7 in)
1974
39.1 mm (1.5 in)
1975
47.0 mm (1.9 in)
1976
20.3 mm (0.8 in)
1977
27.9 mm (1.1 in)
1978
44.5 mm (1.8 in)
1979
17.8 mm (0.7 in)
1980
25.7 mm (1.0 in)
1981
19.1 mm (0.8 in)
1982
43.2 mm (1.7 in)
1983
23.4 mm (0.9 in)
1984
19.6 mm (0.8 in)
1985
30.5 mm (1.2 in)
1986
63.5 mm (2.5 in)
1987
45.7 mm (1.8 in)
1988
13.2 mm (0.5 in)
1989
37.1 mm (1.5 in)
1990
38.1 mm (1.5 in)
1991
20.8 mm (0.8 in)
1992
32.3 mm (1.3 in)
1993
31.8 mm (1.3 in)
1994
26.2 mm (1.0 in)
1995
56.4 mm (2.2 in)
1996
33.0 mm (1.3 in)
1997
54.9 mm (2.2 in)
1998
19.1 mm (0.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Rudyard 27 N, 1960 to 1998. The record is 118.2 mm (4.7 in) in 1990, marked on the chart; the median year is 47.9 mm (1.9 in).
Wettest five days (Rx5day) at Rudyard 27 N by year
Year
Wettest five days (Rx5day)
1960
3.3 mm (0.13 in)
1961
19.1 mm (0.8 in)
1962
48.4 mm (1.9 in)
1963
53.4 mm (2.1 in)
1964
54.4 mm (2.1 in)
1965
64.7 mm (2.5 in)
1966
50.8 mm (2.0 in)
1967
46.0 mm (1.8 in)
1968
54.6 mm (2.1 in)
1969
28.7 mm (1.1 in)
1970
75.9 mm (3.0 in)
1971
47.9 mm (1.9 in)
1972
27.9 mm (1.1 in)
1973
33.3 mm (1.3 in)
1974
59.2 mm (2.3 in)
1975
86.6 mm (3.4 in)
1976
45.6 mm (1.8 in)
1977
38.1 mm (1.5 in)
1978
50.1 mm (2.0 in)
1979
24.7 mm (1.0 in)
1980
51.0 mm (2.0 in)
1981
47.8 mm (1.9 in)
1982
55.6 mm (2.2 in)
1983
37.5 mm (1.5 in)
1984
25.5 mm (1.0 in)
1985
31.2 mm (1.2 in)
1986
63.5 mm (2.5 in)
1987
83.9 mm (3.3 in)
1988
25.5 mm (1.0 in)
1989
62.2 mm (2.4 in)
1990
118.2 mm (4.7 in)
1991
35.2 mm (1.4 in)
1992
75.5 mm (3.0 in)
1993
35.1 mm (1.4 in)
1994
33.5 mm (1.3 in)
1995
78.0 mm (3.1 in)
1996
35.5 mm (1.4 in)
1997
60.7 mm (2.4 in)
1998
23.4 mm (0.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Rudyard 27 N, 1960 to 1998. The record is 87 days in 1968, marked on the chart; the median year is 43 days.
Longest dry spell (CDD) at Rudyard 27 N by year
Year
Longest dry spell (CDD)
1960
16 days
1961
28 days
1962
36 days
1963
31 days
1964
59 days
1965
48 days
1966
33 days
1967
35 days
1968
87 days
1969
64 days
1970
43 days
1971
44 days
1972
35 days
1973
52 days
1974
78 days
1975
34 days
1976
56 days
1977
56 days
1978
61 days
1979
42 days
1980
32 days
1981
41 days
1982
52 days
1983
66 days
1984
57 days
1985
43 days
1986
32 days
1987
75 days
1988
45 days
1989
28 days
1990
71 days
1991
37 days
1992
36 days
1993
36 days
1994
36 days
1995
49 days
1996
36 days
1997
49 days
1998
35 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
27 years with a frost
Across 27 years with a frost, the median last spring frost at Rudyard 27 N falls on 12 May and the median first autumn frost on 18 September, which leaves a median of 129 days between them.
Fitted over all years, the growing season changes by +3.0 days per decade at this station.
Frost dates and growing season at Rudyard 27 N
Measure
Median, all years
Earliest period
Recent period (1961 to 1997)
Recent against earliest
Fitted trend
Last spring frost
12 May
n/a
12 May
n/a
-0.9 days per decade
First autumn frost
18 September
n/a
18 September
n/a
+2.1 days per decade
Growing days
129 days
n/a
129 days
n/a
+3.0 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.
Download the Data
Data for Rudyard 27 N standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Rudyard 27 N 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.