Record envelope, standing records and threshold days for Havre Wb City (USW00024035), Montana, United States, with 83 years of record.
Key Facts for Havre Wb City
Havre Wb City (USW00024035) is a weather station in Montana, United States at 48.57 latitude and -109.67 longitude, 760 m (2,493 ft) above sea level.
The station reports from 1879 to 1961, 83 years of record.
1,464 records set at Havre Wb City still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Havre Wb City set a daily record high minimum temperature of 2.2 C (36.0 F) on 21 February 1961.
About the Station
Location: Montana, United States, 48.57 latitude, -109.67 longitude.
Elevation: 760 m (2,493 ft).
Period of record: 1879 to 1961, 83 years.
Eligible elements: tmax, tmin, prcp.
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 Havre Wb City. 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 Havre Wb City, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
18.3 C (64.9 F)
-49.4 C (-56.9 F)
n/a
n/a
Feb
21.7 C (71.1 F)
-44.4 C (-47.9 F)
n/a
n/a
Mar
25.0 C (77.0 F)
-40.6 C (-41.1 F)
n/a
n/a
Apr
35.0 C (95.0 F)
-23.9 C (-11.0 F)
n/a
n/a
May
36.7 C (98.1 F)
-10.0 C (14.0 F)
n/a
n/a
Jun
42.2 C (108.0 F)
-1.7 C (28.9 F)
n/a
n/a
Jul
41.7 C (107.1 F)
2.2 C (36.0 F)
n/a
n/a
Aug
41.1 C (106.0 F)
-2.8 C (27.0 F)
n/a
n/a
Sep
36.7 C (98.1 F)
-7.8 C (18.0 F)
n/a
n/a
Oct
32.8 C (91.0 F)
-21.7 C (-7.1 F)
n/a
n/a
Nov
23.9 C (75.0 F)
-36.1 C (-33.0 F)
n/a
n/a
Dec
21.7 C (71.1 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 Havre Wb City still stand. 1936 holds the most, with 71.
Standing records at Havre Wb City by the year they were set
Year set
Standing records
1893
34
1894
9
1895
27
1896
41
1897
26
1898
30
1899
32
1900
21
1901
19
1902
10
1903
20
1904
21
1905
40
1906
27
1907
18
1908
15
1909
35
1910
45
1911
21
1912
13
1913
17
1914
17
1915
13
1916
35
1917
20
1918
28
1919
48
1920
14
1921
20
1922
20
1923
16
1924
15
1925
18
1926
20
1927
15
1928
27
1929
21
1930
27
1931
17
1932
17
1933
15
1934
20
1935
22
1936
71
1937
13
1938
10
1939
31
1940
18
1941
15
1942
11
1943
24
1944
20
1945
16
1946
7
1947
13
1948
12
1949
16
1950
23
1951
24
1952
13
1953
16
1954
22
1955
19
1956
25
1957
10
1958
16
1959
13
1960
14
1961
6
All-Time Record Progression
2 new records
2 all-time records were set at Havre Wb City between 9 July 1930 and 23 July 1936. Each dot is a new record.
When Havre Wb City set new all-time records
Date
Kind
Detail
1930-07-09
Record high minimum temperature
Record high minimum temperature 23.9 C (75.0 F)
1936-07-23
Record high minimum temperature
Record high minimum temperature 26.1 C (79.0 F)
Wettest Day of Each Month
Jun: 64.3 mm (2.5 in)
The wettest day on record for each calendar month at Havre Wb City. The most was 64.3 mm (2.5 in) on 16 June 1897.
Record daily precipitation for each month at Havre Wb City
Month
Record daily precipitation (mm)
Date
Jan
15.5 mm (0.6 in)
3 January 1913
Feb
12.2 mm (0.5 in)
17 February 1908
Mar
20.1 mm (0.8 in)
29 March 1938
Apr
32.3 mm (1.3 in)
26 April 1901
May
63.0 mm (2.5 in)
2 May 1899
Jun
64.3 mm (2.5 in)
16 June 1897
Jul
47.2 mm (1.9 in)
26 July 1916
Aug
40.1 mm (1.6 in)
2 August 1899
Sep
64.0 mm (2.5 in)
4 September 1911
Oct
34.0 mm (1.3 in)
27 October 1940
Nov
16.3 mm (0.6 in)
26 November 1960
Dec
24.1 mm (0.9 in)
27 December 1917
Period of Record Coverage
1879 to 1961
Complete yearUnder 90 percent of days
70 years of record at Havre Wb City, 1879 to 1961. 2 years have data for under 90 percent of days and are left out of rankings: 1879, 1961.
Cooler than the station meanWarmer than the station mean
One stripe for each of 68 complete years at Havre Wb City, 1893 to 1960. Blue stripes are years cooler than the station's own mean of 5.9 C (42.7 F); red stripes are warmer. The coolest year was 1916, at 3.3 C (37.9 F), and the warmest was 1934, at 8.4 C (47.2 F). The strongest colour marks a difference of 2.7 C (4.9 F).
Annual mean temperature at Havre Wb City as warming stripes, 1893 to 1960
Year
Annual mean temperature
Difference from the station mean
1893
4.1 C
-1.87 C
1894
6.0 C
+0.09 C
1895
4.4 C
-1.59 C
1896
4.3 C
-1.65 C
1897
4.5 C
-1.49 C
1898
5.4 C
-0.52 C
1899
3.6 C
-2.40 C
1900
7.0 C
+1.09 C
1901
6.8 C
+0.80 C
1902
5.4 C
-0.54 C
1903
5.6 C
-0.33 C
1904
5.5 C
-0.47 C
1905
6.0 C
+0.08 C
1906
6.1 C
+0.17 C
1907
4.0 C
-1.93 C
1908
6.6 C
+0.69 C
1909
4.7 C
-1.22 C
1910
7.2 C
+1.20 C
1911
4.1 C
-1.88 C
1912
5.2 C
-0.73 C
1913
5.0 C
-0.92 C
1914
5.7 C
-0.24 C
1915
5.7 C
-0.30 C
1916
3.3 C
-2.67 C
1917
4.4 C
-1.57 C
1918
6.3 C
+0.39 C
1919
5.8 C
-0.16 C
1920
6.2 C
+0.21 C
1921
7.0 C
+1.07 C
1922
4.9 C
-1.04 C
1923
6.7 C
+0.72 C
1924
5.4 C
-0.56 C
1925
6.5 C
+0.56 C
1926
7.1 C
+1.18 C
1927
4.2 C
-1.76 C
1928
6.9 C
+0.99 C
1929
5.2 C
-0.80 C
1930
7.2 C
+1.20 C
1931
8.2 C
+2.25 C
1932
6.4 C
+0.40 C
1933
6.9 C
+0.97 C
1934
8.4 C
+2.48 C
1935
5.7 C
-0.27 C
1936
5.7 C
-0.24 C
1937
5.7 C
-0.27 C
1938
7.1 C
+1.13 C
1939
7.8 C
+1.87 C
1940
6.7 C
+0.70 C
1941
7.6 C
+1.63 C
1942
6.5 C
+0.52 C
1943
6.5 C
+0.53 C
1944
6.8 C
+0.89 C
1945
5.9 C
-0.02 C
1946
7.0 C
+1.06 C
1947
6.6 C
+0.63 C
1948
6.5 C
+0.55 C
1949
5.9 C
-0.03 C
1950
4.2 C
-1.78 C
1951
4.0 C
-2.00 C
1952
6.2 C
+0.23 C
1953
8.1 C
+2.14 C
1954
6.8 C
+0.89 C
1955
4.6 C
-1.37 C
1956
6.5 C
+0.53 C
1957
6.5 C
+0.59 C
1958
7.2 C
+1.24 C
1959
5.9 C
-0.08 C
1960
6.7 C
+0.70 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.4) per decade over 1893 to 1960. In Fahrenheit: 0.4 F (0.2 to 0.7) 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 Havre Wb City
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.4) per decade
0.4 F (0.2 to 0.7) per decade
1893 to 1960
68
Rise
Mean daily maximum
0.3 C (0.1 to 0.4) per decade
0.5 F (0.2 to 0.7) per decade
1893 to 1960
68
Rise
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.4 F (0.1 to 0.6) per decade
1893 to 1960
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
1879 to 1961
Yearly extremes at Havre Wb City: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.2 C (108.0 F)
1900
37.2 C (99.0 F)
70
Coldest night (TNn)
-49.4 C (-56.9 F)
1916
-35.3 C (-31.5 F)
70
Wettest day (Rx1day)
64.3 mm (2.5 in)
1897
28.2 mm (1.1 in)
70
Wettest five days (Rx5day)
114.3 mm (4.5 in)
1911
49.8 mm (2.0 in)
69
Longest dry spell (CDD)
63 days
1949
35 days
70
Hottest day (TXx)
The hottest day of the year at Havre Wb City, 1879 to 1961. The record is 42.2 C (108.0 F) in 1900, marked on the chart; the median year is 37.2 C (99.0 F).
Hottest day (TXx) at Havre Wb City by year
Year
Hottest day (TXx)
1879
13.9 C (57.0 F)
1893
39.4 C (102.9 F)
1894
37.2 C (99.0 F)
1895
35.6 C (96.1 F)
1896
36.7 C (98.1 F)
1897
36.1 C (97.0 F)
1898
36.7 C (98.1 F)
1899
37.2 C (99.0 F)
1900
42.2 C (108.0 F)
1901
36.1 C (97.0 F)
1902
36.7 C (98.1 F)
1903
35.6 C (96.1 F)
1904
37.8 C (100.0 F)
1905
36.7 C (98.1 F)
1906
39.4 C (102.9 F)
1907
33.3 C (91.9 F)
1908
41.1 C (106.0 F)
1909
36.7 C (98.1 F)
1910
38.9 C (102.0 F)
1911
35.6 C (96.1 F)
1912
35.6 C (96.1 F)
1913
35.0 C (95.0 F)
1914
37.2 C (99.0 F)
1915
34.4 C (93.9 F)
1916
33.3 C (91.9 F)
1917
37.8 C (100.0 F)
1918
37.8 C (100.0 F)
1919
39.4 C (102.9 F)
1920
38.9 C (102.0 F)
1921
38.9 C (102.0 F)
1922
36.7 C (98.1 F)
1923
35.6 C (96.1 F)
1924
35.0 C (95.0 F)
1925
37.2 C (99.0 F)
1926
38.9 C (102.0 F)
1927
35.6 C (96.1 F)
1928
36.7 C (98.1 F)
1929
40.0 C (104.0 F)
1930
40.0 C (104.0 F)
1931
39.4 C (102.9 F)
1932
37.8 C (100.0 F)
1933
41.7 C (107.1 F)
1934
38.9 C (102.0 F)
1935
38.3 C (100.9 F)
1936
41.7 C (107.1 F)
1937
40.6 C (105.1 F)
1938
36.1 C (97.0 F)
1939
39.4 C (102.9 F)
1940
40.6 C (105.1 F)
1941
40.6 C (105.1 F)
1942
36.7 C (98.1 F)
1943
36.1 C (97.0 F)
1944
36.7 C (98.1 F)
1945
38.3 C (100.9 F)
1946
37.8 C (100.0 F)
1947
38.3 C (100.9 F)
1948
37.8 C (100.0 F)
1949
41.1 C (106.0 F)
1950
36.7 C (98.1 F)
1951
39.4 C (102.9 F)
1952
36.7 C (98.1 F)
1953
40.0 C (104.0 F)
1954
38.3 C (100.9 F)
1955
38.3 C (100.9 F)
1956
36.7 C (98.1 F)
1957
37.2 C (99.0 F)
1958
36.1 C (97.0 F)
1959
37.2 C (99.0 F)
1960
40.6 C (105.1 F)
1961
17.2 C (63.0 F)
Coldest night (TNn)
The coldest night of the year at Havre Wb City, 1879 to 1961. The record is -49.4 C (-56.9 F) in 1916, marked on the chart; the median year is -35.3 C (-31.5 F).
Coldest night (TNn) at Havre Wb City by year
Year
Coldest night (TNn)
1879
-2.2 C (28.0 F)
1893
-42.8 C (-45.0 F)
1894
-32.2 C (-26.0 F)
1895
-36.7 C (-34.1 F)
1896
-36.1 C (-33.0 F)
1897
-41.7 C (-43.1 F)
1898
-30.0 C (-22.0 F)
1899
-41.7 C (-43.1 F)
1900
-38.3 C (-36.9 F)
1901
-31.7 C (-25.1 F)
1902
-32.2 C (-26.0 F)
1903
-33.9 C (-29.0 F)
1904
-37.2 C (-35.0 F)
1905
-44.4 C (-47.9 F)
1906
-31.1 C (-24.0 F)
1907
-42.8 C (-45.0 F)
1908
-28.3 C (-18.9 F)
1909
-40.0 C (-40.0 F)
1910
-36.1 C (-33.0 F)
1911
-38.9 C (-38.0 F)
1912
-36.7 C (-34.1 F)
1913
-37.8 C (-36.0 F)
1914
-41.7 C (-43.1 F)
1915
-33.9 C (-29.0 F)
1916
-49.4 C (-56.9 F)
1917
-38.3 C (-36.9 F)
1918
-39.4 C (-38.9 F)
1919
-35.0 C (-31.0 F)
1920
-35.0 C (-31.0 F)
1921
-32.2 C (-26.0 F)
1922
-37.2 C (-35.0 F)
1923
-36.1 C (-33.0 F)
1924
-37.8 C (-36.0 F)
1925
-29.4 C (-20.9 F)
1926
-27.8 C (-18.0 F)
1927
-38.3 C (-36.9 F)
1928
-35.0 C (-31.0 F)
1929
-39.4 C (-38.9 F)
1930
-35.0 C (-31.0 F)
1931
-28.9 C (-20.0 F)
1932
-34.4 C (-29.9 F)
1933
-35.6 C (-32.1 F)
1934
-28.3 C (-18.9 F)
1935
-36.7 C (-34.1 F)
1936
-43.9 C (-47.0 F)
1937
-37.8 C (-36.0 F)
1938
-32.8 C (-27.0 F)
1939
-40.0 C (-40.0 F)
1940
-35.0 C (-31.0 F)
1941
-32.2 C (-26.0 F)
1942
-31.1 C (-24.0 F)
1943
-41.1 C (-42.0 F)
1944
-27.2 C (-17.0 F)
1945
-32.8 C (-27.0 F)
1946
-30.6 C (-23.1 F)
1947
-35.6 C (-32.1 F)
1948
-29.4 C (-20.9 F)
1949
-36.7 C (-34.1 F)
1950
-39.4 C (-38.9 F)
1951
-34.4 C (-29.9 F)
1952
-35.0 C (-31.0 F)
1953
-26.1 C (-15.0 F)
1954
-41.7 C (-43.1 F)
1955
-32.8 C (-27.0 F)
1956
-35.6 C (-32.1 F)
1957
-38.3 C (-36.9 F)
1958
-27.8 C (-18.0 F)
1959
-31.7 C (-25.1 F)
1960
-31.1 C (-24.0 F)
1961
-25.0 C (-13.0 F)
Wettest day (Rx1day)
The wettest day of the year at Havre Wb City, 1879 to 1961. The record is 64.3 mm (2.5 in) in 1897, marked on the chart; the median year is 28.2 mm (1.1 in).
Wettest day (Rx1day) at Havre Wb City by year
Year
Wettest day (Rx1day)
1879
0.0 mm (0.00 in)
1893
23.1 mm (0.9 in)
1894
24.9 mm (1.0 in)
1895
40.4 mm (1.6 in)
1896
33.3 mm (1.3 in)
1897
64.3 mm (2.5 in)
1898
30.0 mm (1.2 in)
1899
63.0 mm (2.5 in)
1900
24.4 mm (1.0 in)
1901
36.6 mm (1.4 in)
1902
22.9 mm (0.9 in)
1903
45.0 mm (1.8 in)
1904
27.7 mm (1.1 in)
1905
14.7 mm (0.6 in)
1906
34.5 mm (1.4 in)
1907
24.6 mm (1.0 in)
1908
49.3 mm (1.9 in)
1909
36.1 mm (1.4 in)
1910
19.3 mm (0.8 in)
1911
64.0 mm (2.5 in)
1912
27.4 mm (1.1 in)
1913
22.1 mm (0.9 in)
1914
24.9 mm (1.0 in)
1915
20.3 mm (0.8 in)
1916
47.2 mm (1.9 in)
1917
58.4 mm (2.3 in)
1918
18.3 mm (0.7 in)
1919
16.5 mm (0.6 in)
1920
33.5 mm (1.3 in)
1921
26.4 mm (1.0 in)
1922
38.9 mm (1.5 in)
1923
48.5 mm (1.9 in)
1924
63.5 mm (2.5 in)
1925
47.8 mm (1.9 in)
1926
30.0 mm (1.2 in)
1927
24.9 mm (1.0 in)
1928
26.7 mm (1.1 in)
1929
24.6 mm (1.0 in)
1930
15.0 mm (0.6 in)
1931
24.4 mm (1.0 in)
1932
33.5 mm (1.3 in)
1933
39.9 mm (1.6 in)
1934
26.4 mm (1.0 in)
1935
13.2 mm (0.5 in)
1936
21.6 mm (0.9 in)
1937
56.4 mm (2.2 in)
1938
51.3 mm (2.0 in)
1939
13.2 mm (0.5 in)
1940
34.5 mm (1.4 in)
1941
31.2 mm (1.2 in)
1942
27.2 mm (1.1 in)
1943
38.1 mm (1.5 in)
1944
16.8 mm (0.7 in)
1945
40.6 mm (1.6 in)
1946
17.5 mm (0.7 in)
1947
23.9 mm (0.9 in)
1948
19.3 mm (0.8 in)
1949
32.5 mm (1.3 in)
1950
34.3 mm (1.4 in)
1951
36.3 mm (1.4 in)
1952
21.1 mm (0.8 in)
1953
34.3 mm (1.4 in)
1954
28.7 mm (1.1 in)
1955
33.0 mm (1.3 in)
1956
25.1 mm (1.0 in)
1957
23.1 mm (0.9 in)
1958
28.7 mm (1.1 in)
1959
51.3 mm (2.0 in)
1960
20.6 mm (0.8 in)
1961
3.0 mm (0.12 in)
Wettest five days (Rx5day)
The wettest five days of the year at Havre Wb City, 1879 to 1961. The record is 114.3 mm (4.5 in) in 1911, marked on the chart; the median year is 49.8 mm (2.0 in).
Wettest five days (Rx5day) at Havre Wb City by year
Year
Wettest five days (Rx5day)
1879
n/a
1893
35.1 mm (1.4 in)
1894
54.9 mm (2.2 in)
1895
74.2 mm (2.9 in)
1896
62.4 mm (2.5 in)
1897
103.2 mm (4.1 in)
1898
51.6 mm (2.0 in)
1899
84.8 mm (3.3 in)
1900
27.0 mm (1.1 in)
1901
43.5 mm (1.7 in)
1902
61.4 mm (2.4 in)
1903
53.6 mm (2.1 in)
1904
45.3 mm (1.8 in)
1905
18.0 mm (0.7 in)
1906
53.5 mm (2.1 in)
1907
50.0 mm (2.0 in)
1908
68.1 mm (2.7 in)
1909
68.3 mm (2.7 in)
1910
32.0 mm (1.3 in)
1911
114.3 mm (4.5 in)
1912
46.7 mm (1.8 in)
1913
28.7 mm (1.1 in)
1914
52.5 mm (2.1 in)
1915
42.9 mm (1.7 in)
1916
65.3 mm (2.6 in)
1917
61.2 mm (2.4 in)
1918
33.4 mm (1.3 in)
1919
25.2 mm (1.0 in)
1920
46.2 mm (1.8 in)
1921
44.4 mm (1.7 in)
1922
70.4 mm (2.8 in)
1923
88.4 mm (3.5 in)
1924
93.7 mm (3.7 in)
1925
60.7 mm (2.4 in)
1926
49.8 mm (2.0 in)
1927
70.3 mm (2.8 in)
1928
76.0 mm (3.0 in)
1929
36.1 mm (1.4 in)
1930
22.4 mm (0.9 in)
1931
41.2 mm (1.6 in)
1932
90.2 mm (3.6 in)
1933
91.2 mm (3.6 in)
1934
41.6 mm (1.6 in)
1935
16.0 mm (0.6 in)
1936
22.9 mm (0.9 in)
1937
66.6 mm (2.6 in)
1938
75.2 mm (3.0 in)
1939
29.8 mm (1.2 in)
1940
67.0 mm (2.6 in)
1941
53.6 mm (2.1 in)
1942
40.9 mm (1.6 in)
1943
63.5 mm (2.5 in)
1944
37.1 mm (1.5 in)
1945
56.6 mm (2.2 in)
1946
26.2 mm (1.0 in)
1947
36.9 mm (1.5 in)
1948
38.6 mm (1.5 in)
1949
46.7 mm (1.8 in)
1950
45.7 mm (1.8 in)
1951
53.1 mm (2.1 in)
1952
25.9 mm (1.0 in)
1953
59.2 mm (2.3 in)
1954
38.4 mm (1.5 in)
1955
67.1 mm (2.6 in)
1956
33.8 mm (1.3 in)
1957
38.1 mm (1.5 in)
1958
33.0 mm (1.3 in)
1959
82.6 mm (3.3 in)
1960
47.0 mm (1.9 in)
1961
4.5 mm (0.18 in)
Longest dry spell (CDD)
The longest dry spell of the year at Havre Wb City, 1879 to 1961. The record is 63 days in 1949, marked on the chart; the median year is 35 days.
Longest dry spell (CDD) at Havre Wb City by year
Year
Longest dry spell (CDD)
1879
1 day
1893
25 days
1894
29 days
1895
33 days
1896
30 days
1897
31 days
1898
34 days
1899
26 days
1900
23 days
1901
47 days
1902
41 days
1903
34 days
1904
55 days
1905
38 days
1906
45 days
1907
62 days
1908
35 days
1909
29 days
1910
31 days
1911
30 days
1912
23 days
1913
35 days
1914
39 days
1915
41 days
1916
36 days
1917
42 days
1918
28 days
1919
29 days
1920
40 days
1921
30 days
1922
30 days
1923
51 days
1924
22 days
1925
47 days
1926
42 days
1927
28 days
1928
38 days
1929
29 days
1930
28 days
1931
51 days
1932
27 days
1933
24 days
1934
53 days
1935
40 days
1936
45 days
1937
31 days
1938
25 days
1939
39 days
1940
34 days
1941
35 days
1942
35 days
1943
37 days
1944
34 days
1945
36 days
1946
36 days
1947
23 days
1948
30 days
1949
63 days
1950
19 days
1951
32 days
1952
56 days
1953
58 days
1954
51 days
1955
49 days
1956
30 days
1957
46 days
1958
35 days
1959
43 days
1960
28 days
1961
28 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 Havre Wb City falls on 10 May and the median first autumn frost on 21 September, which leaves a median of 131 days between them.
In 1931 to 1960 the median growing season was 139 days. That is 13 days more than in 1893 to 1922.
Fitted over all years, the growing season changes by +2.8 days per decade at this station.
Frost dates and growing season at Havre Wb City
Measure
Median, all years
Earliest period (1893 to 1922)
Recent period (1931 to 1960)
Recent against earliest
Fitted trend
Last spring frost
10 May
13 May
8 May
5 days earlier
-1.2 days per decade
First autumn frost
21 September
15 September
24 September
9 days later
+1.6 days per decade
Growing days
131 days
126 days
139 days
13 days more
+2.8 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
68 years, 1893 to 1960
A day with at least 29.5 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 78.4 mm (3.1 in) of rain is expected about once in 100 years.
Rainfall return levels at Havre Wb City: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
29.5 mm (1.2 in)
5 years
41.4 mm (1.6 in)
10 years
49.7 mm (2.0 in)
25 years
60.8 mm (2.4 in)
50 years
69.5 mm (2.7 in)
100 years
78.4 mm (3.1 in)
Longer than the 68 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, 68 years of values from 1893 to 1960.
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: 64.3 mm (2.5 in) in 1897; 64.0 mm (2.5 in) in 1911; 63.5 mm (2.5 in) in 1924.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Havre Wb City, at 1921. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1921 ran 0.3 C (0.5 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Havre Wb City, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1921
+0.3
+0.5
likely
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for Havre Wb City standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Havre Wb City 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.