Record envelope, standing records and threshold days for Lonepine 1 WNW (USC00245164), Montana, United States, with 52 years of record.
Key Facts for Lonepine 1 WNW
Lonepine 1 WNW (USC00245164) is a weather station in Montana, United States at 47.72 latitude and -114.65 longitude, 878 m (2,881 ft) above sea level.
The station reports from 1918 to 1969, 52 years of record.
1,464 records set at Lonepine 1 WNW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Lonepine 1 WNW set a daily record low maximum temperature of 12.2 C (54.0 F) on 26 June 1969.
About the Station
Location: Montana, United States, 47.72 latitude, -114.65 longitude.
Elevation: 878 m (2,881 ft).
Period of record: 1918 to 1969, 52 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 Lonepine 1 WNW. 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 Lonepine 1 WNW, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
14.4 C (57.9 F)
-37.2 C (-35.0 F)
n/a
n/a
Feb
19.4 C (66.9 F)
-40.0 C (-40.0 F)
n/a
n/a
Mar
23.3 C (73.9 F)
-28.9 C (-20.0 F)
n/a
n/a
Apr
29.4 C (84.9 F)
-20.0 C (-4.0 F)
n/a
n/a
May
35.0 C (95.0 F)
-7.8 C (18.0 F)
n/a
n/a
Jun
37.8 C (100.0 F)
-1.1 C (30.0 F)
n/a
n/a
Jul
40.6 C (105.1 F)
2.2 C (36.0 F)
n/a
n/a
Aug
38.9 C (102.0 F)
0.0 C (32.0 F)
n/a
n/a
Sep
35.0 C (95.0 F)
-13.3 C (8.1 F)
n/a
n/a
Oct
28.3 C (82.9 F)
-20.6 C (-5.1 F)
n/a
n/a
Nov
19.4 C (66.9 F)
-31.1 C (-24.0 F)
n/a
n/a
Dec
17.2 C (63.0 F)
-40.6 C (-41.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Lonepine 1 WNW still stand. 1936 holds the most, with 81.
Standing records at Lonepine 1 WNW by the year they were set
Year set
Standing records
1918
7
1919
68
1920
10
1922
29
1923
13
1924
52
1925
39
1926
32
1927
21
1928
29
1929
33
1930
42
1931
45
1932
41
1933
36
1934
50
1935
44
1936
81
1937
32
1938
16
1939
37
1940
25
1941
16
1942
20
1943
32
1944
20
1945
20
1946
20
1947
17
1948
20
1949
31
1950
40
1951
23
1952
24
1953
29
1954
27
1955
31
1956
28
1957
20
1958
15
1959
30
1960
34
1961
22
1962
14
1963
19
1964
20
1965
26
1966
23
1967
28
1968
25
1969
8
All-Time Record Progression
4 new records
4 all-time records were set at Lonepine 1 WNW between 26 January 1957 and 31 December 1968. Each dot is a new record.
When Lonepine 1 WNW set new all-time records
Date
Kind
Detail
1957-01-26
Record low maximum temperature
Record low maximum temperature -23.9 C (-11.0 F)
1964-06-08
Record daily precipitation
Record daily precipitation 46.5 mm (1.8 in)
1968-12-30
Record low maximum temperature
Record low maximum temperature -25.6 C (-14.1 F)
1968-12-31
Record low minimum temperature
Record low minimum temperature -40.6 C (-41.1 F)
Wettest Day of Each Month
Jun: 46.5 mm (1.8 in)
The wettest day on record for each calendar month at Lonepine 1 WNW. The most was 46.5 mm (1.8 in) on 8 June 1964.
Record daily precipitation for each month at Lonepine 1 WNW
Month
Record daily precipitation (mm)
Date
Jan
24.6 mm (1.0 in)
9 January 1953
Feb
14.5 mm (0.6 in)
1 February 1963
Mar
20.1 mm (0.8 in)
5 March 1932
Apr
18.8 mm (0.7 in)
9 April 1943
May
28.7 mm (1.1 in)
13 May 1958
Jun
46.5 mm (1.8 in)
8 June 1964
Jul
36.8 mm (1.4 in)
27 July 1940
Aug
29.7 mm (1.2 in)
22 August 1947
Sep
28.2 mm (1.1 in)
15 September 1959
Oct
23.1 mm (0.9 in)
2 October 1946
Nov
21.6 mm (0.9 in)
5 November 1958
Dec
20.6 mm (0.8 in)
22 December 1955
Period of Record Coverage
1918 to 1969
Complete yearUnder 90 percent of days
51 years of record at Lonepine 1 WNW, 1918 to 1969. 10 years have data for under 90 percent of days and are left out of rankings: 1918, 1920, 1922, 1923, 1924, 1959, 1960, 1961 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 37 complete years at Lonepine 1 WNW, 1919 to 1968. Blue stripes are years cooler than the station's own mean of 7.4 C (45.3 F); red stripes are warmer. The coolest year was 1955, at 5.8 C (42.4 F), and the warmest was 1934, at 9.7 C (49.4 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Lonepine 1 WNW as warming stripes, 1919 to 1968
Year
Annual mean temperature
Difference from the station mean
1919
7.1 C
-0.30 C
1925
9.1 C
+1.69 C
1927
6.8 C
-0.53 C
1929
6.3 C
-1.08 C
1930
7.0 C
-0.36 C
1931
8.2 C
+0.87 C
1932
7.2 C
-0.13 C
1933
7.9 C
+0.50 C
1934
9.7 C
+2.32 C
1935
6.6 C
-0.77 C
1937
6.5 C
-0.87 C
1938
7.7 C
+0.30 C
1939
8.5 C
+1.10 C
1940
8.5 C
+1.16 C
1941
8.2 C
+0.87 C
1942
6.6 C
-0.77 C
1943
6.1 C
-1.27 C
1944
7.9 C
+0.57 C
1945
7.9 C
+0.57 C
1946
7.4 C
+0.04 C
1947
8.0 C
+0.65 C
1948
6.6 C
-0.76 C
1949
6.9 C
-0.51 C
1950
6.4 C
-0.94 C
1951
6.4 C
-0.97 C
1952
7.2 C
-0.19 C
1953
8.8 C
+1.47 C
1954
6.8 C
-0.54 C
1955
5.8 C
-1.62 C
1956
6.8 C
-0.58 C
1957
6.8 C
-0.61 C
1958
8.1 C
+0.75 C
1962
6.6 C
-0.82 C
1965
7.3 C
-0.10 C
1966
7.4 C
+0.05 C
1967
8.4 C
+1.02 C
1968
7.1 C
-0.30 C
The fitted trend in annual mean temperature here over 1919 to 1968 is -0.1 C (-0.4 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 Lonepine 1 WNW
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.1 C (-0.4 to 0.1) per decade
-0.2 F (-0.6 to 0.2) per decade
1919 to 1968
37
Not clearly different from zero
Mean daily maximum
-0.22 C (-0.48 to 0.04) per decade
-0.4 F (-0.9 to 0.1) per decade
1919 to 1968
37
Not clearly different from zero
Mean daily minimum
0.01 C (-0.25 to 0.26) per decade
0.01 F (-0.44 to 0.47) per decade
1919 to 1968
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
1918 to 1969
Yearly extremes at Lonepine 1 WNW: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.6 C (105.1 F)
1919
36.1 C (97.0 F)
51
Coldest night (TNn)
-40.6 C (-41.1 F)
1968
-28.3 C (-18.9 F)
51
Wettest day (Rx1day)
46.5 mm (1.8 in)
1964
20.1 mm (0.8 in)
51
Wettest five days (Rx5day)
65.8 mm (2.6 in)
1964
33.5 mm (1.3 in)
51
Longest dry spell (CDD)
78 days
1967
37 days
51
Hottest day (TXx)
The hottest day of the year at Lonepine 1 WNW, 1918 to 1969. The record is 40.6 C (105.1 F) in 1919, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Lonepine 1 WNW by year
Year
Hottest day (TXx)
1918
14.4 C (57.9 F)
1919
40.6 C (105.1 F)
1920
17.8 C (64.0 F)
1922
36.1 C (97.0 F)
1923
37.8 C (100.0 F)
1924
40.6 C (105.1 F)
1925
38.3 C (100.9 F)
1926
37.8 C (100.0 F)
1927
37.2 C (99.0 F)
1928
38.9 C (102.0 F)
1929
37.8 C (100.0 F)
1930
38.9 C (102.0 F)
1931
37.8 C (100.0 F)
1932
37.8 C (100.0 F)
1933
38.3 C (100.9 F)
1934
40.0 C (104.0 F)
1935
37.2 C (99.0 F)
1936
38.9 C (102.0 F)
1937
37.2 C (99.0 F)
1938
36.7 C (98.1 F)
1939
38.9 C (102.0 F)
1940
38.3 C (100.9 F)
1941
39.4 C (102.9 F)
1942
36.7 C (98.1 F)
1943
33.9 C (93.0 F)
1944
35.0 C (95.0 F)
1945
35.6 C (96.1 F)
1946
36.1 C (97.0 F)
1947
36.1 C (97.0 F)
1948
32.8 C (91.0 F)
1949
36.1 C (97.0 F)
1950
35.0 C (95.0 F)
1951
36.1 C (97.0 F)
1952
35.6 C (96.1 F)
1953
37.8 C (100.0 F)
1954
35.6 C (96.1 F)
1955
35.6 C (96.1 F)
1956
35.6 C (96.1 F)
1957
32.8 C (91.0 F)
1958
33.9 C (93.0 F)
1959
36.1 C (97.0 F)
1960
38.3 C (100.9 F)
1961
38.3 C (100.9 F)
1962
34.4 C (93.9 F)
1963
34.4 C (93.9 F)
1964
35.0 C (95.0 F)
1965
35.0 C (95.0 F)
1966
32.8 C (91.0 F)
1967
35.6 C (96.1 F)
1968
35.6 C (96.1 F)
1969
32.8 C (91.0 F)
Coldest night (TNn)
The coldest night of the year at Lonepine 1 WNW, 1918 to 1969. The record is -40.6 C (-41.1 F) in 1968, marked on the chart; the median year is -28.3 C (-18.9 F).
Coldest night (TNn) at Lonepine 1 WNW by year
Year
Coldest night (TNn)
1918
-21.7 C (-7.1 F)
1919
-35.6 C (-32.1 F)
1920
-16.1 C (3.0 F)
1922
-28.3 C (-18.9 F)
1923
-6.7 C (19.9 F)
1924
-33.9 C (-29.0 F)
1925
-16.1 C (3.0 F)
1926
-22.2 C (-8.0 F)
1927
-36.1 C (-33.0 F)
1928
-26.7 C (-16.1 F)
1929
-33.9 C (-29.0 F)
1930
-31.7 C (-25.1 F)
1931
-23.9 C (-11.0 F)
1932
-28.9 C (-20.0 F)
1933
-35.6 C (-32.1 F)
1934
-17.2 C (1.0 F)
1935
-34.4 C (-29.9 F)
1936
-40.0 C (-40.0 F)
1937
-36.1 C (-33.0 F)
1938
-27.8 C (-18.0 F)
1939
-30.6 C (-23.1 F)
1940
-23.3 C (-9.9 F)
1941
-18.9 C (-2.0 F)
1942
-27.8 C (-18.0 F)
1943
-31.1 C (-24.0 F)
1944
-22.2 C (-8.0 F)
1945
-22.8 C (-9.0 F)
1946
-19.4 C (-2.9 F)
1947
-20.6 C (-5.1 F)
1948
-25.6 C (-14.1 F)
1949
-32.2 C (-26.0 F)
1950
-36.7 C (-34.1 F)
1951
-30.0 C (-22.0 F)
1952
-28.3 C (-18.9 F)
1953
-12.8 C (9.0 F)
1954
-30.6 C (-23.1 F)
1955
-31.1 C (-24.0 F)
1956
-33.3 C (-27.9 F)
1957
-37.2 C (-35.0 F)
1958
-15.6 C (3.9 F)
1959
-27.2 C (-17.0 F)
1960
-27.2 C (-17.0 F)
1961
-29.4 C (-20.9 F)
1962
-33.3 C (-27.9 F)
1963
-33.3 C (-27.9 F)
1964
-35.6 C (-32.1 F)
1965
-21.7 C (-7.1 F)
1966
-21.7 C (-7.1 F)
1967
-18.3 C (-0.9 F)
1968
-40.6 C (-41.1 F)
1969
-30.6 C (-23.1 F)
Wettest day (Rx1day)
The wettest day of the year at Lonepine 1 WNW, 1918 to 1969. The record is 46.5 mm (1.8 in) in 1964, marked on the chart; the median year is 20.1 mm (0.8 in).
Wettest day (Rx1day) at Lonepine 1 WNW by year
Year
Wettest day (Rx1day)
1918
2.5 mm (0.10 in)
1919
20.3 mm (0.8 in)
1920
21.1 mm (0.8 in)
1922
15.2 mm (0.6 in)
1923
27.2 mm (1.1 in)
1924
24.4 mm (1.0 in)
1925
27.4 mm (1.1 in)
1926
20.8 mm (0.8 in)
1927
19.8 mm (0.8 in)
1928
19.6 mm (0.8 in)
1929
17.8 mm (0.7 in)
1930
17.0 mm (0.7 in)
1931
24.4 mm (1.0 in)
1932
20.1 mm (0.8 in)
1933
18.5 mm (0.7 in)
1934
25.4 mm (1.0 in)
1935
10.2 mm (0.4 in)
1936
18.3 mm (0.7 in)
1937
15.2 mm (0.6 in)
1938
14.7 mm (0.6 in)
1939
9.9 mm (0.39 in)
1940
36.8 mm (1.4 in)
1941
18.3 mm (0.7 in)
1942
18.0 mm (0.7 in)
1943
22.9 mm (0.9 in)
1944
22.9 mm (0.9 in)
1945
22.4 mm (0.9 in)
1946
23.1 mm (0.9 in)
1947
29.7 mm (1.2 in)
1948
21.8 mm (0.9 in)
1949
14.7 mm (0.6 in)
1950
13.0 mm (0.5 in)
1951
22.4 mm (0.9 in)
1952
21.1 mm (0.8 in)
1953
24.6 mm (1.0 in)
1954
17.5 mm (0.7 in)
1955
21.8 mm (0.9 in)
1956
18.0 mm (0.7 in)
1957
24.6 mm (1.0 in)
1958
28.7 mm (1.1 in)
1959
28.2 mm (1.1 in)
1960
17.0 mm (0.7 in)
1961
11.4 mm (0.4 in)
1962
14.0 mm (0.6 in)
1963
14.5 mm (0.6 in)
1964
46.5 mm (1.8 in)
1965
23.4 mm (0.9 in)
1966
17.3 mm (0.7 in)
1967
16.8 mm (0.7 in)
1968
18.3 mm (0.7 in)
1969
26.2 mm (1.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Lonepine 1 WNW, 1918 to 1969. The record is 65.8 mm (2.6 in) in 1964, marked on the chart; the median year is 33.5 mm (1.3 in).
Wettest five days (Rx5day) at Lonepine 1 WNW by year
Year
Wettest five days (Rx5day)
1918
5.0 mm (0.20 in)
1919
30.6 mm (1.2 in)
1920
36.4 mm (1.4 in)
1922
20.6 mm (0.8 in)
1923
54.1 mm (2.1 in)
1924
32.0 mm (1.3 in)
1925
36.6 mm (1.4 in)
1926
39.1 mm (1.5 in)
1927
36.6 mm (1.4 in)
1928
30.3 mm (1.2 in)
1929
46.4 mm (1.8 in)
1930
21.7 mm (0.9 in)
1931
38.3 mm (1.5 in)
1932
33.1 mm (1.3 in)
1933
53.3 mm (2.1 in)
1934
34.1 mm (1.3 in)
1935
15.3 mm (0.6 in)
1936
24.9 mm (1.0 in)
1937
23.5 mm (0.9 in)
1938
27.4 mm (1.1 in)
1939
20.0 mm (0.8 in)
1940
40.4 mm (1.6 in)
1941
31.2 mm (1.2 in)
1942
33.5 mm (1.3 in)
1943
42.7 mm (1.7 in)
1944
49.5 mm (1.9 in)
1945
32.0 mm (1.3 in)
1946
45.4 mm (1.8 in)
1947
39.7 mm (1.6 in)
1948
39.1 mm (1.5 in)
1949
23.9 mm (0.9 in)
1950
25.1 mm (1.0 in)
1951
26.6 mm (1.0 in)
1952
21.7 mm (0.9 in)
1953
46.7 mm (1.8 in)
1954
27.9 mm (1.1 in)
1955
40.5 mm (1.6 in)
1956
27.2 mm (1.1 in)
1957
36.8 mm (1.4 in)
1958
49.3 mm (1.9 in)
1959
37.3 mm (1.5 in)
1960
39.4 mm (1.6 in)
1961
39.2 mm (1.5 in)
1962
31.8 mm (1.3 in)
1963
32.3 mm (1.3 in)
1964
65.8 mm (2.6 in)
1965
39.7 mm (1.6 in)
1966
32.5 mm (1.3 in)
1967
25.7 mm (1.0 in)
1968
24.7 mm (1.0 in)
1969
46.8 mm (1.8 in)
Longest dry spell (CDD)
The longest dry spell of the year at Lonepine 1 WNW, 1918 to 1969. The record is 78 days in 1967, marked on the chart; the median year is 37 days.
Longest dry spell (CDD) at Lonepine 1 WNW by year
Year
Longest dry spell (CDD)
1918
10 days
1919
70 days
1920
53 days
1922
57 days
1923
29 days
1924
36 days
1925
23 days
1926
46 days
1927
26 days
1928
40 days
1929
49 days
1930
24 days
1931
63 days
1932
49 days
1933
24 days
1934
68 days
1935
53 days
1936
25 days
1937
30 days
1938
58 days
1939
44 days
1940
37 days
1941
39 days
1942
40 days
1943
43 days
1944
34 days
1945
28 days
1946
37 days
1947
26 days
1948
42 days
1949
26 days
1950
22 days
1951
34 days
1952
37 days
1953
39 days
1954
24 days
1955
51 days
1956
23 days
1957
24 days
1958
18 days
1959
51 days
1960
44 days
1961
34 days
1962
21 days
1963
44 days
1964
26 days
1965
43 days
1966
26 days
1967
78 days
1968
23 days
1969
26 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 Lonepine 1 WNW falls on 24 May and the median first autumn frost on 19 September, which leaves a median of 121 days between them.
Fitted over all years, the growing season changes by +0.5 days per decade at this station.
Frost dates and growing season at Lonepine 1 WNW
Measure
Median, all years
Earliest period
Recent period (1933 to 1968)
Recent against earliest
Fitted trend
Last spring frost
24 May
n/a
24 May
n/a
+0.4 days per decade
First autumn frost
19 September
n/a
19 September
n/a
+0.9 days per decade
Growing days
121 days
n/a
121 days
n/a
+0.5 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
42 years, 1919 to 1968
A day with at least 19.9 mm (0.8 in) of rain is expected about once in 2 years. A day with at least 34.3 mm (1.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Lonepine 1 WNW: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
19.9 mm (0.8 in)
5 years
24.7 mm (1.0 in)
10 years
27.4 mm (1.1 in)
25 years
30.5 mm (1.2 in)
50 years
32.5 mm (1.3 in)
Longer than the 42 years of record
100 years
34.3 mm (1.4 in)
Longer than the 42 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, 42 years of values from 1919 to 1968.
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: 36.8 mm (1.4 in) in 1940; 29.7 mm (1.2 in) in 1947; 28.7 mm (1.1 in) in 1958.
Download the Data
Data for Lonepine 1 WNW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Lonepine 1 WNW 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.