Record envelope, standing records and threshold days for Alunite (USC00420113), Utah, United States, with 37 years of record.
Key Facts for Alunite
Alunite (USC00420113) is a weather station in Utah, United States at 38.37 latitude and -112.27 longitude, 2,056 m (6,745 ft) above sea level.
The station reports from 1917 to 1953, 37 years of record.
1,464 records set at Alunite still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Alunite set a daily record precipitation of 6.4 mm (0.25 in) on 18 July 1953.
About the Station
Location: Utah, United States, 38.37 latitude, -112.27 longitude.
Elevation: 2,056 m (6,745 ft).
Period of record: 1917 to 1953, 37 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 Alunite. 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 Alunite, 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)
-32.8 C (-27.0 F)
n/a
n/a
Feb
22.8 C (73.0 F)
-30.6 C (-23.1 F)
n/a
n/a
Mar
21.7 C (71.1 F)
-18.9 C (-2.0 F)
n/a
n/a
Apr
28.9 C (84.0 F)
-12.8 C (9.0 F)
n/a
n/a
May
32.8 C (91.0 F)
-7.2 C (19.0 F)
n/a
n/a
Jun
37.8 C (100.0 F)
-4.4 C (24.1 F)
n/a
n/a
Jul
41.1 C (106.0 F)
1.7 C (35.1 F)
n/a
n/a
Aug
38.3 C (100.9 F)
1.1 C (34.0 F)
n/a
n/a
Sep
35.0 C (95.0 F)
-5.6 C (21.9 F)
n/a
n/a
Oct
32.2 C (90.0 F)
-12.2 C (10.0 F)
n/a
n/a
Nov
26.1 C (79.0 F)
-21.1 C (-6.0 F)
n/a
n/a
Dec
20.0 C (68.0 F)
-28.3 C (-18.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Alunite still stand. 1921 holds the most, with 68.
Standing records at Alunite by the year they were set
Year set
Standing records
1917
45
1918
42
1919
53
1920
39
1921
68
1922
48
1923
41
1924
56
1925
28
1926
42
1927
52
1928
52
1929
42
1930
38
1931
55
1932
42
1933
34
1934
54
1935
27
1936
34
1937
32
1938
29
1939
37
1940
37
1941
27
1942
44
1943
40
1944
34
1945
39
1946
27
1947
25
1948
40
1949
22
1950
45
1951
53
1952
30
1953
11
Wettest Day of Each Month
May: 39.4 mm (1.6 in)
The wettest day on record for each calendar month at Alunite. The most was 39.4 mm (1.6 in) on 11 May 1947.
Record daily precipitation for each month at Alunite
Month
Record daily precipitation (mm)
Date
Jan
35.6 mm (1.4 in)
18 January 1921
Feb
21.6 mm (0.9 in)
28 February 1948
Mar
29.0 mm (1.1 in)
2 March 1938
Apr
23.1 mm (0.9 in)
10 April 1945
May
39.4 mm (1.6 in)
11 May 1947
Jun
38.9 mm (1.5 in)
2 June 1943
Jul
28.4 mm (1.1 in)
20 July 1927
Aug
26.4 mm (1.0 in)
26 August 1932
Sep
32.3 mm (1.3 in)
12 September 1927
Oct
25.4 mm (1.0 in)
26 October 1940
Nov
23.9 mm (0.9 in)
17 November 1941
Dec
24.1 mm (0.9 in)
5 December 1951
Period of Record Coverage
1917 to 1953
Complete yearUnder 90 percent of days
37 years of record at Alunite, 1917 to 1953. 7 years have data for under 90 percent of days and are left out of rankings: 1917, 1923, 1930, 1939, 1949, 1952, 1953.
Cooler than the station meanWarmer than the station mean
One stripe for each of 30 complete years at Alunite, 1918 to 1951. Blue stripes are years cooler than the station's own mean of 8.9 C (47.9 F); red stripes are warmer. The coolest year was 1944, at 8.0 C (46.3 F), and the warmest was 1934, at 10.6 C (51.1 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Alunite as warming stripes, 1918 to 1951
Year
Annual mean temperature
Difference from the station mean
1918
8.8 C
-0.04 C
1919
9.1 C
+0.24 C
1920
8.6 C
-0.21 C
1921
10.3 C
+1.41 C
1922
8.9 C
+0.05 C
1923
8.6 C
-0.21 C
1924
8.9 C
+0.03 C
1925
8.9 C
+0.06 C
1926
9.6 C
+0.78 C
1927
9.3 C
+0.45 C
1928
8.9 C
+0.04 C
1929
8.4 C
-0.47 C
1931
9.5 C
+0.65 C
1932
8.1 C
-0.76 C
1933
8.7 C
-0.12 C
1934
10.6 C
+1.76 C
1935
9.1 C
+0.27 C
1936
9.3 C
+0.47 C
1937
8.6 C
-0.30 C
1938
8.4 C
-0.42 C
1941
8.2 C
-0.70 C
1942
8.5 C
-0.36 C
1943
9.0 C
+0.12 C
1944
8.0 C
-0.88 C
1945
8.7 C
-0.13 C
1946
8.6 C
-0.27 C
1947
8.6 C
-0.26 C
1948
8.0 C
-0.86 C
1950
9.1 C
+0.20 C
1951
8.3 C
-0.54 C
The annual mean temperature here has fallen by 0.23 C (0.02 to 0.44) per decade over 1918 to 1951. In Fahrenheit: 0.41 F (0.03 to 0.79) per decade. The slope is a straight line fitted to 30 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Alunite
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.23 C (-0.44 to -0.02) per decade
-0.41 F (-0.79 to -0.03) per decade
1918 to 1951
30
Fall
Mean daily maximum
-0.2 C (-0.4 to 0.1) per decade
-0.3 F (-0.8 to 0.2) per decade
1918 to 1951
30
Not clearly different from zero
Mean daily minimum
-0.3 C (-0.6 to -0.1) per decade
-0.5 F (-1.0 to -0.1) per decade
1918 to 1951
30
Fall
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
1917 to 1953
Yearly extremes at Alunite: 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)
1931
36.1 C (97.0 F)
37
Coldest night (TNn)
-32.8 C (-27.0 F)
1937
-22.8 C (-9.0 F)
37
Wettest day (Rx1day)
39.4 mm (1.6 in)
1947
22.1 mm (0.9 in)
37
Wettest five days (Rx5day)
61.0 mm (2.4 in)
1936
36.1 mm (1.4 in)
37
Longest dry spell (CDD)
87 days
1950
39 days
37
Hottest day (TXx)
The hottest day of the year at Alunite, 1917 to 1953. The record is 41.1 C (106.0 F) in 1931, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Alunite by year
Year
Hottest day (TXx)
1917
36.7 C (98.1 F)
1918
37.2 C (99.0 F)
1919
37.8 C (100.0 F)
1920
37.8 C (100.0 F)
1921
37.2 C (99.0 F)
1922
37.8 C (100.0 F)
1923
36.7 C (98.1 F)
1924
35.6 C (96.1 F)
1925
40.0 C (104.0 F)
1926
37.8 C (100.0 F)
1927
37.8 C (100.0 F)
1928
36.7 C (98.1 F)
1929
37.8 C (100.0 F)
1930
34.4 C (93.9 F)
1931
41.1 C (106.0 F)
1932
35.0 C (95.0 F)
1933
36.1 C (97.0 F)
1934
35.6 C (96.1 F)
1935
35.6 C (96.1 F)
1936
36.1 C (97.0 F)
1937
35.6 C (96.1 F)
1938
38.3 C (100.9 F)
1939
37.8 C (100.0 F)
1940
36.7 C (98.1 F)
1941
34.4 C (93.9 F)
1942
35.6 C (96.1 F)
1943
35.0 C (95.0 F)
1944
35.6 C (96.1 F)
1945
33.3 C (91.9 F)
1946
36.7 C (98.1 F)
1947
35.6 C (96.1 F)
1948
35.0 C (95.0 F)
1949
34.4 C (93.9 F)
1950
35.0 C (95.0 F)
1951
34.4 C (93.9 F)
1952
35.0 C (95.0 F)
1953
22.8 C (73.0 F)
Coldest night (TNn)
The coldest night of the year at Alunite, 1917 to 1953. The record is -32.8 C (-27.0 F) in 1937, marked on the chart; the median year is -22.8 C (-9.0 F).
Coldest night (TNn) at Alunite by year
Year
Coldest night (TNn)
1917
-9.4 C (15.1 F)
1918
-19.4 C (-2.9 F)
1919
-24.4 C (-11.9 F)
1920
-17.2 C (1.0 F)
1921
-14.4 C (6.1 F)
1922
-26.1 C (-15.0 F)
1923
-20.6 C (-5.1 F)
1924
-27.8 C (-18.0 F)
1925
-20.6 C (-5.1 F)
1926
-21.1 C (-6.0 F)
1927
-23.9 C (-11.0 F)
1928
-20.6 C (-5.1 F)
1929
-27.8 C (-18.0 F)
1930
-28.9 C (-20.0 F)
1931
-24.4 C (-11.9 F)
1932
-28.3 C (-18.9 F)
1933
-30.6 C (-23.1 F)
1934
-17.8 C (0.0 F)
1935
-24.4 C (-11.9 F)
1936
-20.0 C (-4.0 F)
1937
-32.8 C (-27.0 F)
1938
-18.9 C (-2.0 F)
1939
-21.1 C (-6.0 F)
1940
-24.4 C (-11.9 F)
1941
-16.7 C (1.9 F)
1942
-23.9 C (-11.0 F)
1943
-21.7 C (-7.1 F)
1944
-23.3 C (-9.9 F)
1945
-23.3 C (-9.9 F)
1946
-20.6 C (-5.1 F)
1947
-17.2 C (1.0 F)
1948
-22.8 C (-9.0 F)
1949
-17.8 C (0.0 F)
1950
-25.6 C (-14.1 F)
1951
-28.9 C (-20.0 F)
1952
-26.1 C (-15.0 F)
1953
-18.3 C (-0.9 F)
Wettest day (Rx1day)
The wettest day of the year at Alunite, 1917 to 1953. The record is 39.4 mm (1.6 in) in 1947, marked on the chart; the median year is 22.1 mm (0.9 in).
Wettest day (Rx1day) at Alunite by year
Year
Wettest day (Rx1day)
1917
14.0 mm (0.6 in)
1918
23.9 mm (0.9 in)
1919
19.1 mm (0.8 in)
1920
22.4 mm (0.9 in)
1921
35.6 mm (1.4 in)
1922
25.4 mm (1.0 in)
1923
20.3 mm (0.8 in)
1924
20.6 mm (0.8 in)
1925
20.3 mm (0.8 in)
1926
21.1 mm (0.8 in)
1927
32.3 mm (1.3 in)
1928
18.5 mm (0.7 in)
1929
25.7 mm (1.0 in)
1930
25.9 mm (1.0 in)
1931
12.7 mm (0.5 in)
1932
26.4 mm (1.0 in)
1933
16.8 mm (0.7 in)
1934
21.8 mm (0.9 in)
1935
21.6 mm (0.9 in)
1936
23.4 mm (0.9 in)
1937
20.8 mm (0.8 in)
1938
29.0 mm (1.1 in)
1939
26.9 mm (1.1 in)
1940
25.4 mm (1.0 in)
1941
23.9 mm (0.9 in)
1942
11.9 mm (0.5 in)
1943
38.9 mm (1.5 in)
1944
22.1 mm (0.9 in)
1945
25.9 mm (1.0 in)
1946
21.6 mm (0.9 in)
1947
39.4 mm (1.6 in)
1948
21.6 mm (0.9 in)
1949
11.4 mm (0.4 in)
1950
13.2 mm (0.5 in)
1951
24.1 mm (0.9 in)
1952
31.0 mm (1.2 in)
1953
9.1 mm (0.36 in)
Wettest five days (Rx5day)
The wettest five days of the year at Alunite, 1917 to 1953. The record is 61.0 mm (2.4 in) in 1936, marked on the chart; the median year is 36.1 mm (1.4 in).
Wettest five days (Rx5day) at Alunite by year
Year
Wettest five days (Rx5day)
1917
26.4 mm (1.0 in)
1918
36.4 mm (1.4 in)
1919
36.1 mm (1.4 in)
1920
35.0 mm (1.4 in)
1921
38.6 mm (1.5 in)
1922
40.4 mm (1.6 in)
1923
13.2 mm (0.5 in)
1924
25.6 mm (1.0 in)
1925
36.5 mm (1.4 in)
1926
37.7 mm (1.5 in)
1927
41.2 mm (1.6 in)
1928
30.6 mm (1.2 in)
1929
36.6 mm (1.4 in)
1930
31.0 mm (1.2 in)
1931
40.2 mm (1.6 in)
1932
38.1 mm (1.5 in)
1933
23.9 mm (0.9 in)
1934
40.8 mm (1.6 in)
1935
25.2 mm (1.0 in)
1936
61.0 mm (2.4 in)
1937
47.3 mm (1.9 in)
1938
45.8 mm (1.8 in)
1939
41.6 mm (1.6 in)
1940
33.0 mm (1.3 in)
1941
30.8 mm (1.2 in)
1942
17.3 mm (0.7 in)
1943
52.6 mm (2.1 in)
1944
34.5 mm (1.4 in)
1945
40.1 mm (1.6 in)
1946
38.1 mm (1.5 in)
1947
47.0 mm (1.9 in)
1948
24.1 mm (0.9 in)
1949
29.2 mm (1.1 in)
1950
19.6 mm (0.8 in)
1951
26.9 mm (1.1 in)
1952
34.8 mm (1.4 in)
1953
11.7 mm (0.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Alunite, 1917 to 1953. The record is 87 days in 1950, marked on the chart; the median year is 39 days.
Longest dry spell (CDD) at Alunite by year
Year
Longest dry spell (CDD)
1917
35 days
1918
22 days
1919
45 days
1920
35 days
1921
28 days
1922
34 days
1923
18 days
1924
33 days
1925
20 days
1926
41 days
1927
33 days
1928
29 days
1929
62 days
1930
33 days
1931
28 days
1932
62 days
1933
56 days
1934
47 days
1935
45 days
1936
29 days
1937
23 days
1938
39 days
1939
44 days
1940
62 days
1941
28 days
1942
51 days
1943
34 days
1944
46 days
1945
47 days
1946
45 days
1947
36 days
1948
58 days
1949
28 days
1950
87 days
1951
55 days
1952
61 days
1953
45 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
30 years with a frost
Across 30 years with a frost, the median last spring frost at Alunite falls on 31 May and the median first autumn frost on 25 September, which leaves a median of 123 days between them.
Fitted over all years, the growing season changes by -7.2 days per decade at this station.
Frost dates and growing season at Alunite
Measure
Median, all years
Earliest period
Recent period (1918 to 1951)
Recent against earliest
Fitted trend
Last spring frost
31 May
n/a
31 May
n/a
+4.5 days per decade
First autumn frost
25 September
n/a
25 September
n/a
-2.7 days per decade
Growing days
123 days
n/a
123 days
n/a
-7.2 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 Alunite standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Alunite 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.