Record envelope, standing records and threshold days for Montpelier Rs (USC00106053), Idaho, United States, with 78 years of record.
Key Facts for Montpelier Rs
Montpelier Rs (USC00106053) is a weather station in Idaho, United States at 42.32 latitude and -111.30 longitude, 1,817 m (5,960 ft) above sea level.
The station reports from 1914 to 1991, 78 years of record.
1,464 records set at Montpelier Rs still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Montpelier Rs tied a daily record low maximum temperature of 1.7 C (35.1 F) on 11 April 1991.
About the Station
Location: Idaho, United States, 42.32 latitude, -111.30 longitude.
Elevation: 1,817 m (5,960 ft).
Period of record: 1914 to 1991, 78 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 Montpelier Rs. 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 Montpelier Rs, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
11.7 C (53.1 F)
-36.1 C (-33.0 F)
n/a
n/a
Feb
15.0 C (59.0 F)
-36.7 C (-34.1 F)
n/a
n/a
Mar
21.1 C (70.0 F)
-31.7 C (-25.1 F)
n/a
n/a
Apr
26.7 C (80.1 F)
-22.2 C (-8.0 F)
n/a
n/a
May
33.3 C (91.9 F)
-10.6 C (12.9 F)
n/a
n/a
Jun
37.8 C (100.0 F)
-5.0 C (23.0 F)
n/a
n/a
Jul
38.9 C (102.0 F)
-4.4 C (24.1 F)
n/a
n/a
Aug
37.8 C (100.0 F)
-3.3 C (26.1 F)
n/a
n/a
Sep
34.4 C (93.9 F)
-13.3 C (8.1 F)
n/a
n/a
Oct
29.4 C (84.9 F)
-16.1 C (3.0 F)
n/a
n/a
Nov
21.1 C (70.0 F)
-34.4 C (-29.9 F)
n/a
n/a
Dec
15.6 C (60.1 F)
-37.2 C (-35.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Montpelier Rs still stand. 1917 holds the most, with 47.
Standing records at Montpelier Rs by the year they were set
Year set
Standing records
1914
15
1915
16
1916
26
1917
47
1918
32
1919
31
1920
37
1921
29
1922
44
1923
19
1924
22
1925
16
1926
20
1927
29
1928
19
1929
24
1930
21
1931
26
1932
20
1933
17
1934
32
1935
15
1936
20
1937
17
1938
23
1939
20
1940
31
1941
11
1942
12
1943
11
1944
7
1945
17
1946
9
1947
12
1948
19
1949
21
1950
16
1951
13
1952
11
1953
19
1954
22
1955
35
1956
19
1957
11
1958
14
1959
12
1960
15
1961
12
1962
20
1963
15
1964
22
1965
16
1966
22
1967
10
1968
17
1969
18
1970
13
1971
16
1972
26
1973
15
1974
16
1975
14
1976
12
1977
19
1978
19
1979
22
1980
13
1981
19
1982
21
1983
25
1984
5
1985
17
1986
10
1987
4
1988
10
1989
14
1990
25
1991
3
All-Time Record Progression
1 new records
1 all-time records were set at Montpelier Rs between 11 April 1983 and 11 April 1983. Each dot is a new record.
When Montpelier Rs set new all-time records
Date
Kind
Detail
1983-04-11
Record daily snowfall
Record daily snowfall 52.1 cm (20.5 in)
Wettest Day of Each Month
Jun: 63.5 mm (2.5 in)
The wettest day on record for each calendar month at Montpelier Rs. The most was 63.5 mm (2.5 in) on 16 June 1939.
Record daily precipitation for each month at Montpelier Rs
Month
Record daily precipitation (mm)
Date
Jan
26.2 mm (1.0 in)
12 January 1980
Feb
33.8 mm (1.3 in)
1 February 1963
Mar
25.4 mm (1.0 in)
25 March 1928
Apr
33.8 mm (1.3 in)
21 April 1947
May
24.6 mm (1.0 in)
16 May 1942
Jun
63.5 mm (2.5 in)
16 June 1939
Jul
42.2 mm (1.7 in)
11 July 1930
Aug
43.2 mm (1.7 in)
7 August 1943
Sep
39.1 mm (1.5 in)
26 September 1982
Oct
33.0 mm (1.3 in)
12 October 1928
Nov
48.0 mm (1.9 in)
24 November 1988
Dec
24.4 mm (1.0 in)
23 December 1964
Period of Record Coverage
1914 to 1991
Complete yearUnder 90 percent of days
78 years of record at Montpelier Rs, 1914 to 1991. 19 years have data for under 90 percent of days and are left out of rankings: 1914, 1923, 1924, 1925, 1941, 1942, 1943, 1944 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 62 complete years at Montpelier Rs, 1915 to 1983. Blue stripes are years cooler than the station's own mean of 5.1 C (41.3 F); red stripes are warmer. The coolest year was 1955, at 3.7 C (38.6 F), and the warmest was 1934, at 7.8 C (46.0 F). The strongest colour marks a difference of 2.7 C (4.9 F).
Annual mean temperature at Montpelier Rs as warming stripes, 1915 to 1983
Year
Annual mean temperature
Difference from the station mean
1915
5.2 C
+0.09 C
1916
3.7 C
-1.43 C
1917
4.4 C
-0.77 C
1919
5.6 C
+0.44 C
1920
5.3 C
+0.14 C
1921
6.5 C
+1.32 C
1922
4.4 C
-0.79 C
1923
4.6 C
-0.59 C
1926
6.8 C
+1.64 C
1927
5.5 C
+0.38 C
1928
5.0 C
-0.11 C
1929
4.6 C
-0.57 C
1930
4.7 C
-0.46 C
1931
5.6 C
+0.45 C
1932
4.4 C
-0.72 C
1933
5.6 C
+0.48 C
1934
7.8 C
+2.63 C
1935
5.2 C
+0.02 C
1936
5.7 C
+0.57 C
1937
5.2 C
+0.08 C
1938
6.1 C
+0.95 C
1939
6.6 C
+1.44 C
1940
7.5 C
+2.39 C
1941
6.7 C
+1.59 C
1944
4.4 C
-0.74 C
1945
4.3 C
-0.87 C
1946
5.1 C
-0.08 C
1947
5.2 C
+0.07 C
1948
4.9 C
-0.24 C
1949
5.1 C
-0.08 C
1950
5.2 C
+0.07 C
1951
4.3 C
-0.87 C
1952
4.3 C
-0.85 C
1953
6.3 C
+1.13 C
1954
5.6 C
+0.48 C
1955
3.7 C
-1.50 C
1956
4.7 C
-0.45 C
1957
4.6 C
-0.59 C
1958
5.4 C
+0.25 C
1959
5.4 C
+0.23 C
1960
4.8 C
-0.36 C
1961
5.4 C
+0.22 C
1962
5.2 C
+0.00 C
1963
5.9 C
+0.73 C
1964
3.8 C
-1.38 C
1965
4.6 C
-0.54 C
1966
4.6 C
-0.56 C
1967
5.1 C
-0.01 C
1968
4.6 C
-0.55 C
1969
5.3 C
+0.11 C
1970
5.2 C
+0.01 C
1971
4.3 C
-0.81 C
1972
4.8 C
-0.39 C
1973
4.3 C
-0.85 C
1974
4.9 C
-0.24 C
1975
3.9 C
-1.27 C
1978
5.1 C
-0.07 C
1979
4.9 C
-0.29 C
1980
5.0 C
-0.14 C
1981
7.0 C
+1.89 C
1982
4.4 C
-0.76 C
1983
5.2 C
+0.04 C
The fitted trend in annual mean temperature here over 1915 to 1983 is -0.08 C (-0.19 to 0.03) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.3 to 0.1) per decade. The slope is a straight line fitted to 62 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Montpelier Rs
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.08 C (-0.19 to 0.03) per decade
-0.1 F (-0.3 to 0.1) per decade
1915 to 1983
62
Not clearly different from zero
Mean daily maximum
-0.14 C (-0.27 to -0.01) per decade
-0.25 F (-0.48 to -0.02) per decade
1915 to 1983
62
Fall
Mean daily minimum
-0.02 C (-0.14 to 0.10) per decade
-0.03 F (-0.25 to 0.19) per decade
1915 to 1983
62
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
1914 to 1991
Yearly extremes at Montpelier Rs: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
38.9 C (102.0 F)
1921
34.4 C (93.9 F)
78
Coldest night (TNn)
-37.2 C (-35.0 F)
1924
-29.7 C (-21.5 F)
78
Wettest day (Rx1day)
63.5 mm (2.5 in)
1939
23.0 mm (0.9 in)
78
Wettest five days (Rx5day)
82.6 mm (3.3 in)
1980
38.8 mm (1.5 in)
78
Longest dry spell (CDD)
70 days
1928
29 days
78
Hottest day (TXx)
The hottest day of the year at Montpelier Rs, 1914 to 1991. The record is 38.9 C (102.0 F) in 1921, marked on the chart; the median year is 34.4 C (93.9 F).
Hottest day (TXx) at Montpelier Rs by year
Year
Hottest day (TXx)
1914
34.4 C (93.9 F)
1915
33.9 C (93.0 F)
1916
34.4 C (93.9 F)
1917
32.2 C (90.0 F)
1918
34.4 C (93.9 F)
1919
37.8 C (100.0 F)
1920
37.8 C (100.0 F)
1921
38.9 C (102.0 F)
1922
36.1 C (97.0 F)
1923
35.6 C (96.1 F)
1924
34.4 C (93.9 F)
1925
35.0 C (95.0 F)
1926
36.7 C (98.1 F)
1927
33.9 C (93.0 F)
1928
35.6 C (96.1 F)
1929
34.4 C (93.9 F)
1930
34.4 C (93.9 F)
1931
37.8 C (100.0 F)
1932
32.8 C (91.0 F)
1933
35.0 C (95.0 F)
1934
36.7 C (98.1 F)
1935
35.0 C (95.0 F)
1936
35.6 C (96.1 F)
1937
33.9 C (93.0 F)
1938
33.9 C (93.0 F)
1939
35.6 C (96.1 F)
1940
36.7 C (98.1 F)
1941
34.4 C (93.9 F)
1942
34.4 C (93.9 F)
1943
35.6 C (96.1 F)
1944
31.1 C (88.0 F)
1945
33.3 C (91.9 F)
1946
34.4 C (93.9 F)
1947
34.4 C (93.9 F)
1948
33.9 C (93.0 F)
1949
35.6 C (96.1 F)
1950
34.4 C (93.9 F)
1951
34.4 C (93.9 F)
1952
33.3 C (91.9 F)
1953
33.9 C (93.0 F)
1954
36.1 C (97.0 F)
1955
33.9 C (93.0 F)
1956
33.9 C (93.0 F)
1957
33.3 C (91.9 F)
1958
35.0 C (95.0 F)
1959
35.0 C (95.0 F)
1960
35.6 C (96.1 F)
1961
36.7 C (98.1 F)
1962
35.0 C (95.0 F)
1963
34.4 C (93.9 F)
1964
33.3 C (91.9 F)
1965
32.2 C (90.0 F)
1966
35.0 C (95.0 F)
1967
32.2 C (90.0 F)
1968
33.3 C (91.9 F)
1969
33.9 C (93.0 F)
1970
33.3 C (91.9 F)
1971
33.3 C (91.9 F)
1972
33.9 C (93.0 F)
1973
33.3 C (91.9 F)
1974
35.6 C (96.1 F)
1975
33.3 C (91.9 F)
1976
34.4 C (93.9 F)
1977
33.9 C (93.0 F)
1978
35.0 C (95.0 F)
1979
36.7 C (98.1 F)
1980
33.9 C (93.0 F)
1981
36.1 C (97.0 F)
1982
35.0 C (95.0 F)
1983
33.9 C (93.0 F)
1984
36.1 C (97.0 F)
1985
35.6 C (96.1 F)
1986
35.0 C (95.0 F)
1987
32.8 C (91.0 F)
1988
35.0 C (95.0 F)
1989
35.6 C (96.1 F)
1990
37.2 C (99.0 F)
1991
28.9 C (84.0 F)
Coldest night (TNn)
The coldest night of the year at Montpelier Rs, 1914 to 1991. The record is -37.2 C (-35.0 F) in 1924, marked on the chart; the median year is -29.7 C (-21.5 F).
Coldest night (TNn) at Montpelier Rs by year
Year
Coldest night (TNn)
1914
-29.4 C (-20.9 F)
1915
-32.2 C (-26.0 F)
1916
-31.1 C (-24.0 F)
1917
-35.6 C (-32.1 F)
1918
-28.3 C (-18.9 F)
1919
-31.7 C (-25.1 F)
1920
-27.8 C (-18.0 F)
1921
-29.4 C (-20.9 F)
1922
-35.6 C (-32.1 F)
1923
-32.8 C (-27.0 F)
1924
-37.2 C (-35.0 F)
1925
-25.0 C (-13.0 F)
1926
-26.7 C (-16.1 F)
1927
-33.3 C (-27.9 F)
1928
-26.7 C (-16.1 F)
1929
-34.4 C (-29.9 F)
1930
-36.1 C (-33.0 F)
1931
-25.0 C (-13.0 F)
1932
-34.4 C (-29.9 F)
1933
-36.7 C (-34.1 F)
1934
-21.7 C (-7.1 F)
1935
-31.1 C (-24.0 F)
1936
-30.0 C (-22.0 F)
1937
-34.4 C (-29.9 F)
1938
-24.4 C (-11.9 F)
1939
-27.2 C (-17.0 F)
1940
-26.7 C (-16.1 F)
1941
-26.1 C (-15.0 F)
1942
-34.4 C (-29.9 F)
1943
-27.2 C (-17.0 F)
1944
-24.4 C (-11.9 F)
1945
-29.4 C (-20.9 F)
1946
-26.7 C (-16.1 F)
1947
-28.3 C (-18.9 F)
1948
-32.2 C (-26.0 F)
1949
-35.0 C (-31.0 F)
1950
-32.8 C (-27.0 F)
1951
-32.2 C (-26.0 F)
1952
-31.1 C (-24.0 F)
1953
-22.2 C (-8.0 F)
1954
-28.3 C (-18.9 F)
1955
-34.4 C (-29.9 F)
1956
-35.0 C (-31.0 F)
1957
-31.7 C (-25.1 F)
1958
-26.1 C (-15.0 F)
1959
-28.3 C (-18.9 F)
1960
-32.8 C (-27.0 F)
1961
-27.8 C (-18.0 F)
1962
-35.0 C (-31.0 F)
1963
-33.3 C (-27.9 F)
1964
-28.9 C (-20.0 F)
1965
-24.4 C (-11.9 F)
1966
-27.2 C (-17.0 F)
1967
-26.1 C (-15.0 F)
1968
-25.6 C (-14.1 F)
1969
-25.0 C (-13.0 F)
1970
-27.2 C (-17.0 F)
1971
-30.6 C (-23.1 F)
1972
-33.3 C (-27.9 F)
1973
-26.7 C (-16.1 F)
1974
-33.3 C (-27.9 F)
1975
-28.9 C (-20.0 F)
1976
-24.4 C (-11.9 F)
1977
-23.9 C (-11.0 F)
1978
-35.6 C (-32.1 F)
1979
-33.9 C (-29.0 F)
1980
-30.6 C (-23.1 F)
1981
-23.3 C (-9.9 F)
1982
-34.4 C (-29.9 F)
1983
-28.3 C (-18.9 F)
1984
-33.9 C (-29.0 F)
1985
-34.4 C (-29.9 F)
1986
-24.4 C (-11.9 F)
1987
-30.0 C (-22.0 F)
1988
-28.9 C (-20.0 F)
1989
-36.7 C (-34.1 F)
1990
-31.7 C (-25.1 F)
1991
-26.1 C (-15.0 F)
Wettest day (Rx1day)
The wettest day of the year at Montpelier Rs, 1914 to 1991. The record is 63.5 mm (2.5 in) in 1939, marked on the chart; the median year is 23.0 mm (0.9 in).
Wettest day (Rx1day) at Montpelier Rs by year
Year
Wettest day (Rx1day)
1914
13.5 mm (0.5 in)
1915
24.1 mm (0.9 in)
1916
19.3 mm (0.8 in)
1917
19.1 mm (0.8 in)
1918
18.5 mm (0.7 in)
1919
22.4 mm (0.9 in)
1920
20.3 mm (0.8 in)
1921
21.6 mm (0.9 in)
1922
24.9 mm (1.0 in)
1923
30.7 mm (1.2 in)
1924
12.4 mm (0.5 in)
1925
34.0 mm (1.3 in)
1926
29.2 mm (1.1 in)
1927
26.7 mm (1.1 in)
1928
33.0 mm (1.3 in)
1929
24.4 mm (1.0 in)
1930
42.2 mm (1.7 in)
1931
20.8 mm (0.8 in)
1932
21.3 mm (0.8 in)
1933
23.1 mm (0.9 in)
1934
14.0 mm (0.6 in)
1935
16.8 mm (0.7 in)
1936
24.9 mm (1.0 in)
1937
25.7 mm (1.0 in)
1938
22.6 mm (0.9 in)
1939
63.5 mm (2.5 in)
1940
24.1 mm (0.9 in)
1941
18.5 mm (0.7 in)
1942
24.6 mm (1.0 in)
1943
43.2 mm (1.7 in)
1944
21.1 mm (0.8 in)
1945
23.6 mm (0.9 in)
1946
20.1 mm (0.8 in)
1947
33.8 mm (1.3 in)
1948
18.8 mm (0.7 in)
1949
30.5 mm (1.2 in)
1950
19.3 mm (0.8 in)
1951
17.3 mm (0.7 in)
1952
14.0 mm (0.6 in)
1953
20.3 mm (0.8 in)
1954
19.3 mm (0.8 in)
1955
34.8 mm (1.4 in)
1956
19.6 mm (0.8 in)
1957
14.5 mm (0.6 in)
1958
17.0 mm (0.7 in)
1959
22.9 mm (0.9 in)
1960
20.6 mm (0.8 in)
1961
19.8 mm (0.8 in)
1962
17.3 mm (0.7 in)
1963
33.8 mm (1.3 in)
1964
45.7 mm (1.8 in)
1965
26.2 mm (1.0 in)
1966
19.1 mm (0.8 in)
1967
20.3 mm (0.8 in)
1968
21.8 mm (0.9 in)
1969
22.9 mm (0.9 in)
1970
25.1 mm (1.0 in)
1971
17.5 mm (0.7 in)
1972
24.1 mm (0.9 in)
1973
16.3 mm (0.6 in)
1974
15.2 mm (0.6 in)
1975
28.2 mm (1.1 in)
1976
17.8 mm (0.7 in)
1977
25.7 mm (1.0 in)
1978
36.1 mm (1.4 in)
1979
25.4 mm (1.0 in)
1980
41.1 mm (1.6 in)
1981
28.2 mm (1.1 in)
1982
39.1 mm (1.5 in)
1983
27.2 mm (1.1 in)
1984
38.9 mm (1.5 in)
1985
18.8 mm (0.7 in)
1986
23.6 mm (0.9 in)
1987
25.7 mm (1.0 in)
1988
48.0 mm (1.9 in)
1989
23.4 mm (0.9 in)
1990
28.4 mm (1.1 in)
1991
16.5 mm (0.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Montpelier Rs, 1914 to 1991. The record is 82.6 mm (3.3 in) in 1980, marked on the chart; the median year is 38.8 mm (1.5 in).
Wettest five days (Rx5day) at Montpelier Rs by year
Year
Wettest five days (Rx5day)
1914
21.4 mm (0.8 in)
1915
45.0 mm (1.8 in)
1916
25.9 mm (1.0 in)
1917
42.4 mm (1.7 in)
1918
38.8 mm (1.5 in)
1919
45.5 mm (1.8 in)
1920
32.5 mm (1.3 in)
1921
70.4 mm (2.8 in)
1922
47.0 mm (1.9 in)
1923
56.9 mm (2.2 in)
1924
20.8 mm (0.8 in)
1925
38.6 mm (1.5 in)
1926
49.3 mm (1.9 in)
1927
37.4 mm (1.5 in)
1928
48.2 mm (1.9 in)
1929
31.3 mm (1.2 in)
1930
43.8 mm (1.7 in)
1931
27.7 mm (1.1 in)
1932
33.6 mm (1.3 in)
1933
42.2 mm (1.7 in)
1934
19.8 mm (0.8 in)
1935
33.8 mm (1.3 in)
1936
33.9 mm (1.3 in)
1937
36.8 mm (1.4 in)
1938
38.9 mm (1.5 in)
1939
71.4 mm (2.8 in)
1940
32.8 mm (1.3 in)
1941
36.6 mm (1.4 in)
1942
38.8 mm (1.5 in)
1943
49.8 mm (2.0 in)
1944
45.0 mm (1.8 in)
1945
43.7 mm (1.7 in)
1946
26.4 mm (1.0 in)
1947
45.0 mm (1.8 in)
1948
37.5 mm (1.5 in)
1949
69.6 mm (2.7 in)
1950
44.4 mm (1.7 in)
1951
32.7 mm (1.3 in)
1952
25.7 mm (1.0 in)
1953
26.7 mm (1.1 in)
1954
27.7 mm (1.1 in)
1955
57.0 mm (2.2 in)
1956
27.4 mm (1.1 in)
1957
45.8 mm (1.8 in)
1958
30.3 mm (1.2 in)
1959
43.7 mm (1.7 in)
1960
38.0 mm (1.5 in)
1961
42.0 mm (1.7 in)
1962
34.7 mm (1.4 in)
1963
62.6 mm (2.5 in)
1964
66.8 mm (2.6 in)
1965
44.9 mm (1.8 in)
1966
32.8 mm (1.3 in)
1967
30.7 mm (1.2 in)
1968
47.8 mm (1.9 in)
1969
39.1 mm (1.5 in)
1970
34.3 mm (1.4 in)
1971
34.7 mm (1.4 in)
1972
41.7 mm (1.6 in)
1973
36.4 mm (1.4 in)
1974
27.9 mm (1.1 in)
1975
53.4 mm (2.1 in)
1976
25.7 mm (1.0 in)
1977
43.5 mm (1.7 in)
1978
36.1 mm (1.4 in)
1979
42.4 mm (1.7 in)
1980
82.6 mm (3.3 in)
1981
45.2 mm (1.8 in)
1982
54.7 mm (2.2 in)
1983
36.3 mm (1.4 in)
1984
51.3 mm (2.0 in)
1985
22.9 mm (0.9 in)
1986
41.2 mm (1.6 in)
1987
55.4 mm (2.2 in)
1988
56.6 mm (2.2 in)
1989
38.6 mm (1.5 in)
1990
42.9 mm (1.7 in)
1991
33.8 mm (1.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Montpelier Rs, 1914 to 1991. The record is 70 days in 1928, marked on the chart; the median year is 29 days.
Longest dry spell (CDD) at Montpelier Rs by year
Year
Longest dry spell (CDD)
1914
52 days
1915
25 days
1916
53 days
1917
42 days
1918
35 days
1919
61 days
1920
24 days
1921
43 days
1922
41 days
1923
24 days
1924
19 days
1925
17 days
1926
22 days
1927
34 days
1928
70 days
1929
28 days
1930
22 days
1931
55 days
1932
31 days
1933
63 days
1934
42 days
1935
63 days
1936
28 days
1937
32 days
1938
26 days
1939
67 days
1940
26 days
1941
20 days
1942
19 days
1943
18 days
1944
42 days
1945
19 days
1946
31 days
1947
23 days
1948
25 days
1949
41 days
1950
27 days
1951
27 days
1952
61 days
1953
37 days
1954
21 days
1955
24 days
1956
38 days
1957
23 days
1958
28 days
1959
28 days
1960
46 days
1961
31 days
1962
41 days
1963
40 days
1964
48 days
1965
27 days
1966
41 days
1967
26 days
1968
22 days
1969
30 days
1970
17 days
1971
20 days
1972
24 days
1973
17 days
1974
56 days
1975
31 days
1976
39 days
1977
30 days
1978
52 days
1979
43 days
1980
30 days
1981
41 days
1982
23 days
1983
17 days
1984
20 days
1985
34 days
1986
25 days
1987
16 days
1988
41 days
1989
20 days
1990
24 days
1991
20 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
62 years with a frost
Across 62 years with a frost, the median last spring frost at Montpelier Rs falls on 14 June and the median first autumn frost on 3 September, which leaves a median of 77 days between them.
In 1952 to 1983 the median growing season was 75 days. That is 16 days fewer than in 1915 to 1949.
Fitted over all years, the growing season changes by -0.4 days per decade at this station.
Frost dates and growing season at Montpelier Rs
Measure
Median, all years
Earliest period (1915 to 1949)
Recent period (1952 to 1983)
Recent against earliest
Fitted trend
Last spring frost
14 June
9 June
16 June
7 days later
+1.2 days per decade
First autumn frost
3 September
6 September
3 September
3 days earlier
+0.9 days per decade
Growing days
77 days
91 days
75 days
16 days fewer
-0.4 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
61 years, 1915 to 1988
A day with at least 22.6 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 62.0 mm (2.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Montpelier Rs: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
22.6 mm (0.9 in)
5 years
29.8 mm (1.2 in)
10 years
35.7 mm (1.4 in)
25 years
44.7 mm (1.8 in)
50 years
52.7 mm (2.1 in)
100 years
62.0 mm (2.4 in)
Longer than the 61 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, 61 years of values from 1915 to 1988.
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: 63.5 mm (2.5 in) in 1939; 48.0 mm (1.9 in) in 1988; 45.7 mm (1.8 in) in 1964.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Montpelier Rs standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Montpelier Rs 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.