Record envelope, standing records and threshold days for Grantsville 2W (USC00423348), Utah, United States, with 121 years of record.
Key Facts for Grantsville 2W
Grantsville 2W (USC00423348) is a weather station in Utah, United States at 40.60 latitude and -112.51 longitude, 1,387 m (4,550 ft) above sea level.
The station reports from 1906 to 2026, 121 years of record.
1,464 records set at Grantsville 2W still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Grantsville 2W set a daily record precipitation of 11.7 mm (0.5 in) on 25 February 2026.
About the Station
Location: Utah, United States, 40.60 latitude, -112.51 longitude.
Elevation: 1,387 m (4,550 ft).
Period of record: 1906 to 2026, 121 years.
Eligible elements: prcp, snow, snwd.
Daily Record Envelope and 2026
39 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 Grantsville 2W. The lines show the 2026 daily maximum and minimum. 39 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Grantsville 2W, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
16.1 C (61.0 F)
-22.8 C (-9.0 F)
11.1 C (52.0 F)
-10.6 C (12.9 F)
Feb
20.6 C (69.1 F)
-16.7 C (1.9 F)
20.6 C (69.1 F)
-8.3 C (17.1 F)
Mar
28.3 C (82.9 F)
-14.4 C (6.1 F)
28.3 C (82.9 F)
-5.0 C (23.0 F)
Apr
31.7 C (89.1 F)
-7.2 C (19.0 F)
27.2 C (81.0 F)
-6.1 C (21.0 F)
May
37.8 C (100.0 F)
-4.4 C (24.1 F)
33.9 C (93.0 F)
2.2 C (36.0 F)
Jun
41.1 C (106.0 F)
0.6 C (33.1 F)
37.2 C (99.0 F)
6.7 C (44.1 F)
Jul
41.1 C (106.0 F)
3.9 C (39.0 F)
41.1 C (106.0 F)
15.0 C (59.0 F)
Aug
40.6 C (105.1 F)
6.7 C (44.1 F)
40.6 C (105.1 F)
12.2 C (54.0 F)
Sep
38.9 C (102.0 F)
-2.8 C (27.0 F)
n/a
n/a
Oct
32.8 C (91.0 F)
-14.4 C (6.1 F)
n/a
n/a
Nov
25.0 C (77.0 F)
-18.9 C (-2.0 F)
n/a
n/a
Dec
20.0 C (68.0 F)
-21.7 C (-7.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Grantsville 2W still stand. 2015 holds the most, with 71.
Standing records at Grantsville 2W by the year they were set
Year set
Standing records
1914
17
1917
4
1999
10
2000
48
2001
64
2002
65
2003
69
2004
58
2005
21
2006
60
2007
56
2008
54
2009
56
2010
39
2011
61
2012
55
2013
60
2014
60
2015
71
2016
58
2017
60
2018
45
2019
32
2020
60
2021
51
2022
67
2023
31
2024
39
2025
46
2026
47
All-Time Record Progression
4 new records
4 all-time records were set at Grantsville 2W between 9 January 1993 and 28 November 2019. Each dot is a new record.
When Grantsville 2W set new all-time records
Date
Kind
Detail
1993-01-09
Record snow depth
Record snow depth 43.2 cm (17.0 in)
1993-01-11
Record snow depth
Record snow depth 45.7 cm (18.0 in)
1996-01-25
Record daily snowfall
Record daily snowfall 38.1 cm (15.0 in)
2019-11-28
Record daily snowfall
Record daily snowfall 47.5 cm (18.7 in)
Wettest Day of Each Month
Aug: 54.6 mm (2.1 in)
The wettest day on record for each calendar month at Grantsville 2W. The most was 54.6 mm (2.1 in) on 20 August 1906.
Record daily precipitation for each month at Grantsville 2W
Month
Record daily precipitation (mm)
Date
Jan
23.6 mm (0.9 in)
26 January 1914
Feb
22.4 mm (0.9 in)
2 February 1989
Mar
36.8 mm (1.4 in)
15 March 1963
Apr
43.2 mm (1.7 in)
2 April 1986
May
50.8 mm (2.0 in)
28 May 1906
Jun
28.4 mm (1.1 in)
25 June 2021
Jul
38.6 mm (1.5 in)
21 July 1987
Aug
54.6 mm (2.1 in)
20 August 1906
Sep
48.0 mm (1.9 in)
26 September 1982
Oct
36.3 mm (1.4 in)
20 October 1979
Nov
30.5 mm (1.2 in)
17 November 1930
Dec
24.9 mm (1.0 in)
23 December 1921
Period of Record Coverage
1913 to 2026
Complete yearUnder 90 percent of days
31 years of record at Grantsville 2W, 1913 to 2026. 6 years have data for under 90 percent of days and are left out of rankings: 1913, 1914, 1917, 1999, 2001, 2026.
Cooler than the station meanWarmer than the station mean
One stripe for each of 22 complete years at Grantsville 2W, 2000 to 2025. Blue stripes are years cooler than the station's own mean of 11.0 C (51.7 F); red stripes are warmer. The coolest year was 2013, at 9.3 C (48.8 F), and the warmest was 2025, at 12.6 C (54.6 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Grantsville 2W as warming stripes, 2000 to 2025
Year
Annual mean temperature
Difference from the station mean
2000
11.4 C
+0.48 C
2002
10.3 C
-0.68 C
2004
10.5 C
-0.47 C
2006
11.0 C
+0.01 C
2007
11.1 C
+0.16 C
2008
10.4 C
-0.51 C
2009
10.4 C
-0.58 C
2010
10.4 C
-0.60 C
2011
9.9 C
-1.09 C
2012
11.7 C
+0.70 C
2013
9.3 C
-1.62 C
2014
11.5 C
+0.58 C
2015
11.3 C
+0.33 C
2016
11.0 C
+0.07 C
2017
11.2 C
+0.26 C
2018
11.0 C
+0.07 C
2020
11.2 C
+0.26 C
2021
11.7 C
+0.79 C
2022
11.0 C
+0.04 C
2023
10.3 C
-0.68 C
2024
11.9 C
+0.94 C
2025
12.6 C
+1.61 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
1906 to 2026
Yearly extremes at Grantsville 2W: 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)
2003
38.9 C (102.0 F)
31
Coldest night (TNn)
-22.8 C (-9.0 F)
2017
-16.7 C (1.9 F)
30
Wettest day (Rx1day)
54.6 mm (2.1 in)
1906
23.4 mm (0.9 in)
101
Wettest five days (Rx5day)
91.4 mm (3.6 in)
1982
32.7 mm (1.3 in)
100
Longest dry spell (CDD)
85 days
1978
34 days
101
Hottest day (TXx)
The hottest day of the year at Grantsville 2W, 1906 to 2026. The record is 41.1 C (106.0 F) in 2003, marked on the chart; the median year is 38.9 C (102.0 F).
Hottest day (TXx) at Grantsville 2W by year
Year
Hottest day (TXx)
1906
n/a
1907
n/a
1908
n/a
1909
n/a
1910
n/a
1911
n/a
1912
n/a
1913
8.3 C (46.9 F)
1914
35.0 C (95.0 F)
1915
n/a
1916
n/a
1917
-10.6 C (12.9 F)
1918
n/a
1919
n/a
1920
n/a
1921
n/a
1922
n/a
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
n/a
1933
n/a
1940
n/a
1941
n/a
1942
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
n/a
1964
n/a
1965
n/a
1966
n/a
1967
n/a
1968
n/a
1969
n/a
1970
n/a
1971
n/a
1972
n/a
1973
n/a
1974
n/a
1975
n/a
1976
n/a
1977
n/a
1978
n/a
1979
n/a
1980
n/a
1981
n/a
1982
n/a
1983
n/a
1984
n/a
1985
n/a
1986
n/a
1987
n/a
1988
n/a
1989
n/a
1990
n/a
1991
n/a
1992
n/a
1993
n/a
1994
n/a
1995
n/a
1996
n/a
1997
n/a
1999
25.0 C (77.0 F)
2000
38.9 C (102.0 F)
2001
38.3 C (100.9 F)
2002
40.6 C (105.1 F)
2003
41.1 C (106.0 F)
2004
36.7 C (98.1 F)
2005
37.8 C (100.0 F)
2006
40.6 C (105.1 F)
2007
39.4 C (102.9 F)
2008
38.9 C (102.0 F)
2009
38.3 C (100.9 F)
2010
38.3 C (100.9 F)
2011
38.3 C (100.9 F)
2012
38.9 C (102.0 F)
2013
37.8 C (100.0 F)
2014
39.4 C (102.9 F)
2015
38.9 C (102.0 F)
2016
39.4 C (102.9 F)
2017
38.9 C (102.0 F)
2018
39.4 C (102.9 F)
2019
38.3 C (100.9 F)
2020
38.9 C (102.0 F)
2021
41.1 C (106.0 F)
2022
40.0 C (104.0 F)
2023
40.0 C (104.0 F)
2024
39.4 C (102.9 F)
2025
39.4 C (102.9 F)
2026
41.1 C (106.0 F)
Coldest night (TNn)
The coldest night of the year at Grantsville 2W, 1906 to 2026. The record is -22.8 C (-9.0 F) in 2017, marked on the chart; the median year is -16.7 C (1.9 F).
Coldest night (TNn) at Grantsville 2W by year
Year
Coldest night (TNn)
1906
n/a
1907
n/a
1908
n/a
1909
n/a
1910
n/a
1911
n/a
1912
n/a
1913
-13.3 C (8.1 F)
1914
-16.7 C (1.9 F)
1915
n/a
1916
n/a
1917
n/a
1918
n/a
1919
n/a
1920
n/a
1921
n/a
1922
n/a
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
n/a
1933
n/a
1940
n/a
1941
n/a
1942
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
n/a
1964
n/a
1965
n/a
1966
n/a
1967
n/a
1968
n/a
1969
n/a
1970
n/a
1971
n/a
1972
n/a
1973
n/a
1974
n/a
1975
n/a
1976
n/a
1977
n/a
1978
n/a
1979
n/a
1980
n/a
1981
n/a
1982
n/a
1983
n/a
1984
n/a
1985
n/a
1986
n/a
1987
n/a
1988
n/a
1989
n/a
1990
n/a
1991
n/a
1992
n/a
1993
n/a
1994
n/a
1995
n/a
1996
n/a
1997
n/a
1999
-10.6 C (12.9 F)
2000
-11.1 C (12.0 F)
2001
-16.7 C (1.9 F)
2002
-18.3 C (-0.9 F)
2003
-11.1 C (12.0 F)
2004
-16.7 C (1.9 F)
2005
-17.2 C (1.0 F)
2006
-18.9 C (-2.0 F)
2007
-21.1 C (-6.0 F)
2008
-17.2 C (1.0 F)
2009
-19.4 C (-2.9 F)
2010
-18.9 C (-2.0 F)
2011
-18.3 C (-0.9 F)
2012
-14.4 C (6.1 F)
2013
-21.7 C (-7.1 F)
2014
-17.8 C (0.0 F)
2015
-16.7 C (1.9 F)
2016
-19.4 C (-2.9 F)
2017
-22.8 C (-9.0 F)
2018
-16.1 C (3.0 F)
2019
-15.6 C (3.9 F)
2020
-16.7 C (1.9 F)
2021
-16.7 C (1.9 F)
2022
-17.2 C (1.0 F)
2023
-16.7 C (1.9 F)
2024
-11.1 C (12.0 F)
2025
-14.4 C (6.1 F)
2026
-10.6 C (12.9 F)
Wettest day (Rx1day)
The wettest day of the year at Grantsville 2W, 1906 to 2026. The record is 54.6 mm (2.1 in) in 1906, marked on the chart; the median year is 23.4 mm (0.9 in).
Wettest day (Rx1day) at Grantsville 2W by year
Year
Wettest day (Rx1day)
1906
54.6 mm (2.1 in)
1907
33.3 mm (1.3 in)
1908
34.3 mm (1.4 in)
1909
22.9 mm (0.9 in)
1910
12.7 mm (0.5 in)
1911
23.6 mm (0.9 in)
1912
12.7 mm (0.5 in)
1913
27.9 mm (1.1 in)
1914
23.6 mm (0.9 in)
1915
34.0 mm (1.3 in)
1916
27.9 mm (1.1 in)
1917
17.8 mm (0.7 in)
1918
14.2 mm (0.6 in)
1919
23.4 mm (0.9 in)
1920
24.6 mm (1.0 in)
1921
24.9 mm (1.0 in)
1922
22.1 mm (0.9 in)
1923
23.6 mm (0.9 in)
1924
25.7 mm (1.0 in)
1925
23.6 mm (0.9 in)
1926
22.4 mm (0.9 in)
1927
27.9 mm (1.1 in)
1928
18.8 mm (0.7 in)
1929
13.7 mm (0.5 in)
1930
30.5 mm (1.2 in)
1931
24.1 mm (0.9 in)
1932
24.4 mm (1.0 in)
1933
16.5 mm (0.6 in)
1940
29.0 mm (1.1 in)
1941
18.5 mm (0.7 in)
1942
13.2 mm (0.5 in)
1956
16.8 mm (0.7 in)
1957
28.4 mm (1.1 in)
1958
22.6 mm (0.9 in)
1959
17.5 mm (0.7 in)
1960
13.5 mm (0.5 in)
1961
27.4 mm (1.1 in)
1962
26.4 mm (1.0 in)
1963
36.8 mm (1.4 in)
1964
24.9 mm (1.0 in)
1965
16.0 mm (0.6 in)
1966
22.1 mm (0.9 in)
1967
16.5 mm (0.6 in)
1968
19.8 mm (0.8 in)
1969
34.0 mm (1.3 in)
1970
26.2 mm (1.0 in)
1971
23.1 mm (0.9 in)
1972
24.9 mm (1.0 in)
1973
22.9 mm (0.9 in)
1974
23.1 mm (0.9 in)
1975
29.2 mm (1.1 in)
1976
15.5 mm (0.6 in)
1977
21.8 mm (0.9 in)
1978
28.4 mm (1.1 in)
1979
36.3 mm (1.4 in)
1980
20.1 mm (0.8 in)
1981
23.4 mm (0.9 in)
1982
48.0 mm (1.9 in)
1983
19.3 mm (0.8 in)
1984
23.4 mm (0.9 in)
1985
19.6 mm (0.8 in)
1986
43.2 mm (1.7 in)
1987
38.6 mm (1.5 in)
1988
25.7 mm (1.0 in)
1989
27.4 mm (1.1 in)
1990
20.1 mm (0.8 in)
1991
27.4 mm (1.1 in)
1992
25.9 mm (1.0 in)
1993
22.1 mm (0.9 in)
1994
20.1 mm (0.8 in)
1995
24.9 mm (1.0 in)
1996
19.1 mm (0.8 in)
1997
18.5 mm (0.7 in)
1999
1.8 mm (0.07 in)
2000
34.5 mm (1.4 in)
2001
14.0 mm (0.6 in)
2002
12.7 mm (0.5 in)
2003
24.1 mm (0.9 in)
2004
23.6 mm (0.9 in)
2005
23.9 mm (0.9 in)
2006
20.3 mm (0.8 in)
2007
19.3 mm (0.8 in)
2008
26.2 mm (1.0 in)
2009
26.7 mm (1.1 in)
2010
25.9 mm (1.0 in)
2011
39.4 mm (1.6 in)
2012
11.2 mm (0.4 in)
2013
20.8 mm (0.8 in)
2014
18.0 mm (0.7 in)
2015
29.0 mm (1.1 in)
2016
18.8 mm (0.7 in)
2017
20.1 mm (0.8 in)
2018
26.2 mm (1.0 in)
2019
26.9 mm (1.1 in)
2020
14.0 mm (0.6 in)
2021
28.4 mm (1.1 in)
2022
23.1 mm (0.9 in)
2023
40.6 mm (1.6 in)
2024
12.2 mm (0.5 in)
2025
21.3 mm (0.8 in)
2026
11.7 mm (0.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Grantsville 2W, 1906 to 2026. The record is 91.4 mm (3.6 in) in 1982, marked on the chart; the median year is 32.7 mm (1.3 in).
Wettest five days (Rx5day) at Grantsville 2W by year
Year
Wettest five days (Rx5day)
1906
54.6 mm (2.1 in)
1907
33.3 mm (1.3 in)
1908
35.5 mm (1.4 in)
1909
27.9 mm (1.1 in)
1910
17.1 mm (0.7 in)
1911
25.1 mm (1.0 in)
1912
19.6 mm (0.8 in)
1913
39.1 mm (1.5 in)
1914
33.6 mm (1.3 in)
1915
34.5 mm (1.4 in)
1916
45.0 mm (1.8 in)
1917
38.2 mm (1.5 in)
1918
21.5 mm (0.8 in)
1919
32.5 mm (1.3 in)
1920
41.9 mm (1.6 in)
1921
34.3 mm (1.4 in)
1922
29.7 mm (1.2 in)
1923
29.7 mm (1.2 in)
1924
20.8 mm (0.8 in)
1925
39.9 mm (1.6 in)
1926
n/a
1927
17.5 mm (0.7 in)
1928
1.8 mm (0.07 in)
1929
21.3 mm (0.8 in)
1930
29.0 mm (1.1 in)
1931
25.7 mm (1.0 in)
1932
21.1 mm (0.8 in)
1933
27.4 mm (1.1 in)
1940
29.3 mm (1.2 in)
1941
19.8 mm (0.8 in)
1942
20.3 mm (0.8 in)
1956
18.8 mm (0.7 in)
1957
31.3 mm (1.2 in)
1958
29.0 mm (1.1 in)
1959
24.3 mm (1.0 in)
1960
28.0 mm (1.1 in)
1961
27.4 mm (1.1 in)
1962
32.8 mm (1.3 in)
1963
39.8 mm (1.6 in)
1964
48.0 mm (1.9 in)
1965
29.8 mm (1.2 in)
1966
25.4 mm (1.0 in)
1967
42.9 mm (1.7 in)
1968
29.7 mm (1.2 in)
1969
40.3 mm (1.6 in)
1970
46.0 mm (1.8 in)
1971
38.8 mm (1.5 in)
1972
43.9 mm (1.7 in)
1973
31.0 mm (1.2 in)
1974
38.2 mm (1.5 in)
1975
37.1 mm (1.5 in)
1976
16.0 mm (0.6 in)
1977
40.8 mm (1.6 in)
1978
42.7 mm (1.7 in)
1979
49.7 mm (2.0 in)
1980
35.5 mm (1.4 in)
1981
38.2 mm (1.5 in)
1982
91.4 mm (3.6 in)
1983
43.5 mm (1.7 in)
1984
39.1 mm (1.5 in)
1985
32.3 mm (1.3 in)
1986
64.3 mm (2.5 in)
1987
40.4 mm (1.6 in)
1988
30.3 mm (1.2 in)
1989
37.4 mm (1.5 in)
1990
29.3 mm (1.2 in)
1991
49.5 mm (1.9 in)
1992
29.7 mm (1.2 in)
1993
38.2 mm (1.5 in)
1994
32.8 mm (1.3 in)
1995
37.4 mm (1.5 in)
1996
27.9 mm (1.1 in)
1997
41.4 mm (1.6 in)
1999
5.4 mm (0.21 in)
2000
47.7 mm (1.9 in)
2001
29.2 mm (1.1 in)
2002
27.0 mm (1.1 in)
2003
25.4 mm (1.0 in)
2004
44.4 mm (1.7 in)
2005
33.8 mm (1.3 in)
2006
25.5 mm (1.0 in)
2007
27.2 mm (1.1 in)
2008
27.3 mm (1.1 in)
2009
35.6 mm (1.4 in)
2010
44.5 mm (1.8 in)
2011
56.2 mm (2.2 in)
2012
23.1 mm (0.9 in)
2013
33.8 mm (1.3 in)
2014
36.9 mm (1.5 in)
2015
55.2 mm (2.2 in)
2016
25.2 mm (1.0 in)
2017
36.5 mm (1.4 in)
2018
27.2 mm (1.1 in)
2019
33.6 mm (1.3 in)
2020
18.3 mm (0.7 in)
2021
32.3 mm (1.3 in)
2022
27.2 mm (1.1 in)
2023
91.2 mm (3.6 in)
2024
21.1 mm (0.8 in)
2025
41.7 mm (1.6 in)
2026
17.8 mm (0.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Grantsville 2W, 1906 to 2026. The record is 85 days in 1978, marked on the chart; the median year is 34 days.
Longest dry spell (CDD) at Grantsville 2W by year
Year
Longest dry spell (CDD)
1906
20 days
1907
35 days
1908
36 days
1909
33 days
1910
28 days
1911
53 days
1912
23 days
1913
25 days
1914
31 days
1915
33 days
1916
35 days
1917
52 days
1918
30 days
1919
30 days
1920
22 days
1921
17 days
1922
33 days
1923
26 days
1924
22 days
1925
19 days
1926
2 days
1927
26 days
1928
26 days
1929
2 days
1930
20 days
1931
29 days
1932
47 days
1933
19 days
1940
62 days
1941
23 days
1942
22 days
1956
57 days
1957
31 days
1958
78 days
1959
56 days
1960
50 days
1961
42 days
1962
40 days
1963
33 days
1964
37 days
1965
27 days
1966
39 days
1967
22 days
1968
24 days
1969
41 days
1970
22 days
1971
31 days
1972
32 days
1973
27 days
1974
77 days
1975
24 days
1976
47 days
1977
30 days
1978
85 days
1979
57 days
1980
45 days
1981
29 days
1982
20 days
1983
21 days
1984
26 days
1985
29 days
1986
38 days
1987
48 days
1988
34 days
1989
35 days
1990
31 days
1991
50 days
1992
34 days
1993
37 days
1994
59 days
1995
35 days
1996
57 days
1997
26 days
1999
21 days
2000
43 days
2001
35 days
2002
37 days
2003
41 days
2004
26 days
2005
34 days
2006
24 days
2007
36 days
2008
32 days
2009
21 days
2010
34 days
2011
20 days
2012
47 days
2013
35 days
2014
44 days
2015
42 days
2016
57 days
2017
52 days
2018
42 days
2019
42 days
2020
36 days
2021
37 days
2022
48 days
2023
33 days
2024
78 days
2025
46 days
2026
53 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
22 years with a frost
Across 22 years with a frost, the median last spring frost at Grantsville 2W falls on 4 May and the median first autumn frost on 17 October, which leaves a median of 167 days between them.
Frost dates and growing season at Grantsville 2W
Measure
Median, all years
Earliest period
Recent period (2000 to 2025)
Recent against earliest
Fitted trend
Last spring frost
4 May
n/a
4 May
n/a
n/a
First autumn frost
17 October
n/a
17 October
n/a
n/a
Growing days
167 days
n/a
167 days
n/a
n/a
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
70 years, 1908 to 2025
A day with at least 23.4 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 46.5 mm (1.8 in) of rain is expected about once in 100 years.
Rainfall return levels at Grantsville 2W: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
23.4 mm (0.9 in)
5 years
30.0 mm (1.2 in)
10 years
34.2 mm (1.3 in)
25 years
39.3 mm (1.5 in)
50 years
43.0 mm (1.7 in)
100 years
46.5 mm (1.8 in)
Longer than the 70 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, 70 years of values from 1908 to 2025.
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: 48.0 mm (1.9 in) in 1982; 43.2 mm (1.7 in) in 1986; 40.6 mm (1.6 in) in 2023.
Download the Data
Data for Grantsville 2W standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Grantsville 2W 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.