Record envelope, standing records and threshold days for Umiat (USW00026508), Alaska, United States, with 57 years of record.
Key Facts for Umiat
Umiat (USW00026508) is a weather station in Alaska, United States at 69.37 latitude and -152.14 longitude, 81 m (266 ft) above sea level.
The station reports from 1945 to 2001, 57 years of record.
1,464 records set at Umiat still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Umiat set a daily record low minimum temperature of -31.7 C (-25.1 F) on 30 April 2001.
About the Station
Location: Alaska, United States, 69.37 latitude, -152.14 longitude.
Elevation: 81 m (266 ft).
Period of record: 1945 to 2001, 57 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 Umiat. 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 Umiat, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
2.8 C (37.0 F)
-52.2 C (-62.0 F)
n/a
n/a
Feb
2.8 C (37.0 F)
-54.4 C (-65.9 F)
n/a
n/a
Mar
4.4 C (39.9 F)
-52.8 C (-63.0 F)
n/a
n/a
Apr
10.6 C (51.1 F)
-45.6 C (-50.1 F)
n/a
n/a
May
26.1 C (79.0 F)
-30.0 C (-22.0 F)
n/a
n/a
Jun
31.1 C (88.0 F)
-12.8 C (9.0 F)
n/a
n/a
Jul
33.3 C (91.9 F)
-4.4 C (24.1 F)
n/a
n/a
Aug
32.2 C (90.0 F)
-15.0 C (5.0 F)
n/a
n/a
Sep
23.9 C (75.0 F)
-21.1 C (-6.0 F)
n/a
n/a
Oct
11.1 C (52.0 F)
-38.9 C (-38.0 F)
n/a
n/a
Nov
6.1 C (43.0 F)
-48.9 C (-56.0 F)
n/a
n/a
Dec
2.8 C (37.0 F)
-50.0 C (-58.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Umiat still stand. 1989 holds the most, with 74.
Standing records at Umiat by the year they were set
Year set
Standing records
1945
20
1946
50
1947
20
1948
67
1949
52
1950
48
1951
34
1952
35
1953
26
1954
35
1975
7
1976
39
1977
43
1978
48
1979
56
1980
47
1981
30
1982
34
1983
41
1984
54
1985
37
1986
47
1987
32
1988
43
1989
74
1990
56
1991
55
1992
40
1993
50
1994
30
1995
46
1996
59
1997
27
1998
38
1999
17
2000
19
2001
8
Wettest Day of Each Month
Jun: 109.2 mm (4.3 in)
The wettest day on record for each calendar month at Umiat. The most was 109.2 mm (4.3 in) on 13 June 1980.
Record daily precipitation for each month at Umiat
Month
Record daily precipitation (mm)
Date
Jan
19.1 mm (0.8 in)
24 January 1998
Feb
9.4 mm (0.37 in)
12 February 1989
Mar
27.9 mm (1.1 in)
28 March 2001
Apr
35.6 mm (1.4 in)
26 April 1990
May
8.4 mm (0.33 in)
16 May 1976
Jun
109.2 mm (4.3 in)
13 June 1980
Jul
25.9 mm (1.0 in)
4 July 1993
Aug
96.5 mm (3.8 in)
29 August 1988
Sep
30.5 mm (1.2 in)
23 September 1976
Oct
25.4 mm (1.0 in)
3 October 1998
Nov
12.7 mm (0.5 in)
30 November 1976
Dec
18.8 mm (0.7 in)
9 December 2000
Period of Record Coverage
1945 to 2001
Complete yearUnder 90 percent of days
37 years of record at Umiat, 1945 to 2001. 17 years have data for under 90 percent of days and are left out of rankings: 1945, 1954, 1975, 1981, 1982, 1984, 1989, 1992 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 23 complete years at Umiat, 1946 to 1997. Blue stripes are years cooler than the station's own mean of -12.2 C (10.1 F); red stripes are warmer. The coolest year was 1984, at -14.8 C (5.4 F), and the warmest was 1993, at -9.4 C (15.1 F). The strongest colour marks a difference of 2.8 C (5.0 F).
Annual mean temperature at Umiat as warming stripes, 1946 to 1997
Year
Annual mean temperature
Difference from the station mean
1946
-12.2 C
-0.07 C
1947
-12.0 C
+0.14 C
1948
-13.3 C
-1.12 C
1949
-11.7 C
+0.48 C
1950
-9.6 C
+2.58 C
1951
-12.3 C
-0.17 C
1952
-13.5 C
-1.33 C
1953
-12.9 C
-0.78 C
1977
-11.9 C
+0.25 C
1978
-11.4 C
+0.79 C
1979
-9.6 C
+2.54 C
1980
-11.7 C
+0.48 C
1982
-12.2 C
-0.03 C
1983
-13.5 C
-1.29 C
1984
-14.8 C
-2.59 C
1985
-11.9 C
+0.24 C
1986
-13.6 C
-1.44 C
1987
-12.8 C
-0.65 C
1988
-13.2 C
-1.08 C
1990
-12.3 C
-0.11 C
1991
-13.2 C
-1.03 C
1993
-9.4 C
+2.78 C
1997
-10.8 C
+1.33 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
1945 to 2001
Yearly extremes at Umiat: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
33.3 C (91.9 F)
1993
27.8 C (82.0 F)
37
Coldest night (TNn)
-54.4 C (-65.9 F)
1987
-50.0 C (-58.0 F)
37
Wettest day (Rx1day)
109.2 mm (4.3 in)
1980
16.8 mm (0.7 in)
37
Wettest five days (Rx5day)
116.8 mm (4.6 in)
1980
25.4 mm (1.0 in)
37
Longest dry spell (CDD)
206 days
1947
67 days
37
Hottest day (TXx)
The hottest day of the year at Umiat, 1945 to 2001. The record is 33.3 C (91.9 F) in 1993, marked on the chart; the median year is 27.8 C (82.0 F).
Hottest day (TXx) at Umiat by year
Year
Hottest day (TXx)
1945
23.9 C (75.0 F)
1946
27.8 C (82.0 F)
1947
27.8 C (82.0 F)
1948
23.9 C (75.0 F)
1949
26.1 C (79.0 F)
1950
26.1 C (79.0 F)
1951
29.4 C (84.9 F)
1952
27.2 C (81.0 F)
1953
29.4 C (84.9 F)
1954
23.9 C (75.0 F)
1975
7.2 C (45.0 F)
1976
27.8 C (82.0 F)
1977
29.4 C (84.9 F)
1978
29.4 C (84.9 F)
1979
28.3 C (82.9 F)
1980
27.2 C (81.0 F)
1981
26.7 C (80.1 F)
1982
27.8 C (82.0 F)
1983
27.8 C (82.0 F)
1984
25.6 C (78.1 F)
1985
26.1 C (79.0 F)
1986
26.1 C (79.0 F)
1987
26.7 C (80.1 F)
1988
26.1 C (79.0 F)
1989
27.8 C (82.0 F)
1990
29.4 C (84.9 F)
1991
31.1 C (88.0 F)
1992
30.6 C (87.1 F)
1993
33.3 C (91.9 F)
1994
29.4 C (84.9 F)
1995
28.9 C (84.0 F)
1996
26.7 C (80.1 F)
1997
30.0 C (86.0 F)
1998
28.9 C (84.0 F)
1999
32.2 C (90.0 F)
2000
30.6 C (87.1 F)
2001
7.2 C (45.0 F)
Coldest night (TNn)
The coldest night of the year at Umiat, 1945 to 2001. The record is -54.4 C (-65.9 F) in 1987, marked on the chart; the median year is -50.0 C (-58.0 F).
Coldest night (TNn) at Umiat by year
Year
Coldest night (TNn)
1945
-46.7 C (-52.1 F)
1946
-47.2 C (-53.0 F)
1947
-52.2 C (-62.0 F)
1948
-48.9 C (-56.0 F)
1949
-47.8 C (-54.0 F)
1950
-49.4 C (-56.9 F)
1951
-52.8 C (-63.0 F)
1952
-46.1 C (-51.0 F)
1953
-48.3 C (-54.9 F)
1954
-51.1 C (-60.0 F)
1975
-43.9 C (-47.0 F)
1976
-50.0 C (-58.0 F)
1977
-53.9 C (-65.0 F)
1978
-50.0 C (-58.0 F)
1979
-48.9 C (-56.0 F)
1980
-50.6 C (-59.1 F)
1981
-44.4 C (-47.9 F)
1982
-49.4 C (-56.9 F)
1983
-52.2 C (-62.0 F)
1984
-52.2 C (-62.0 F)
1985
-52.8 C (-63.0 F)
1986
-51.1 C (-60.0 F)
1987
-54.4 C (-65.9 F)
1988
-47.2 C (-53.0 F)
1989
-51.7 C (-61.1 F)
1990
-51.1 C (-60.0 F)
1991
-51.7 C (-61.1 F)
1992
-48.3 C (-54.9 F)
1993
-47.2 C (-53.0 F)
1994
-48.3 C (-54.9 F)
1995
-52.2 C (-62.0 F)
1996
-47.2 C (-53.0 F)
1997
-50.0 C (-58.0 F)
1998
-52.2 C (-62.0 F)
1999
-50.0 C (-58.0 F)
2000
-46.7 C (-52.1 F)
2001
-52.8 C (-63.0 F)
Wettest day (Rx1day)
The wettest day of the year at Umiat, 1945 to 2001. The record is 109.2 mm (4.3 in) in 1980, marked on the chart; the median year is 16.8 mm (0.7 in).
Wettest day (Rx1day) at Umiat by year
Year
Wettest day (Rx1day)
1945
9.9 mm (0.39 in)
1946
9.9 mm (0.39 in)
1947
26.2 mm (1.0 in)
1948
9.7 mm (0.38 in)
1949
5.8 mm (0.23 in)
1950
10.2 mm (0.4 in)
1951
19.6 mm (0.8 in)
1952
8.9 mm (0.35 in)
1953
10.2 mm (0.4 in)
1954
11.7 mm (0.5 in)
1975
7.6 mm (0.30 in)
1976
30.5 mm (1.2 in)
1977
19.1 mm (0.8 in)
1978
16.8 mm (0.7 in)
1979
50.8 mm (2.0 in)
1980
109.2 mm (4.3 in)
1981
15.2 mm (0.6 in)
1982
25.7 mm (1.0 in)
1983
12.7 mm (0.5 in)
1984
16.8 mm (0.7 in)
1985
15.2 mm (0.6 in)
1986
10.2 mm (0.4 in)
1987
5.8 mm (0.23 in)
1988
96.5 mm (3.8 in)
1989
12.7 mm (0.5 in)
1990
35.6 mm (1.4 in)
1991
17.3 mm (0.7 in)
1992
14.0 mm (0.6 in)
1993
25.9 mm (1.0 in)
1994
24.6 mm (1.0 in)
1995
12.7 mm (0.5 in)
1996
19.3 mm (0.8 in)
1997
17.8 mm (0.7 in)
1998
25.4 mm (1.0 in)
1999
17.0 mm (0.7 in)
2000
21.6 mm (0.9 in)
2001
27.9 mm (1.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Umiat, 1945 to 2001. The record is 116.8 mm (4.6 in) in 1980, marked on the chart; the median year is 25.4 mm (1.0 in).
Wettest five days (Rx5day) at Umiat by year
Year
Wettest five days (Rx5day)
1945
23.7 mm (0.9 in)
1946
20.6 mm (0.8 in)
1947
48.0 mm (1.9 in)
1948
17.1 mm (0.7 in)
1949
10.1 mm (0.4 in)
1950
18.1 mm (0.7 in)
1951
31.6 mm (1.2 in)
1952
12.9 mm (0.5 in)
1953
28.4 mm (1.1 in)
1954
12.2 mm (0.5 in)
1975
7.6 mm (0.30 in)
1976
30.9 mm (1.2 in)
1977
24.7 mm (1.0 in)
1978
16.8 mm (0.7 in)
1979
53.7 mm (2.1 in)
1980
116.8 mm (4.6 in)
1981
22.8 mm (0.9 in)
1982
40.1 mm (1.6 in)
1983
12.7 mm (0.5 in)
1984
27.5 mm (1.1 in)
1985
17.5 mm (0.7 in)
1986
20.3 mm (0.8 in)
1987
6.6 mm (0.26 in)
1988
96.8 mm (3.8 in)
1989
17.5 mm (0.7 in)
1990
38.1 mm (1.5 in)
1991
25.4 mm (1.0 in)
1992
14.0 mm (0.6 in)
1993
35.1 mm (1.4 in)
1994
48.9 mm (1.9 in)
1995
15.5 mm (0.6 in)
1996
28.1 mm (1.1 in)
1997
27.0 mm (1.1 in)
1998
50.8 mm (2.0 in)
1999
36.3 mm (1.4 in)
2000
31.5 mm (1.2 in)
2001
45.7 mm (1.8 in)
Longest dry spell (CDD)
The longest dry spell of the year at Umiat, 1945 to 2001. The record is 206 days in 1947, marked on the chart; the median year is 67 days.
Longest dry spell (CDD) at Umiat by year
Year
Longest dry spell (CDD)
1945
37 days
1946
55 days
1947
206 days
1948
45 days
1949
94 days
1950
47 days
1951
50 days
1952
52 days
1953
90 days
1954
48 days
1975
12 days
1976
35 days
1977
56 days
1978
75 days
1979
67 days
1980
135 days
1981
87 days
1982
54 days
1983
163 days
1984
77 days
1985
75 days
1986
194 days
1987
136 days
1988
111 days
1989
68 days
1990
122 days
1991
97 days
1992
61 days
1993
105 days
1994
64 days
1995
105 days
1996
58 days
1997
108 days
1998
42 days
1999
31 days
2000
41 days
2001
55 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
23 years with a frost
Across 23 years with a frost, the median last spring frost at Umiat falls on 23 June and the median first autumn frost on 21 July, which leaves a median of 33 days between them.
Frost dates and growing season at Umiat
Measure
Median, all years
Earliest period
Recent period (1946 to 1997)
Recent against earliest
Fitted trend
Last spring frost
23 June
n/a
23 June
n/a
n/a
First autumn frost
21 July
n/a
21 July
n/a
n/a
Growing days
33 days
n/a
33 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
30 years, 1947 to 2000
A day with at least 16.2 mm (0.6 in) of rain is expected about once in 2 years. A day with at least 132.0 mm (5.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Umiat: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
16.2 mm (0.6 in)
5 years
28.6 mm (1.1 in)
10 years
41.6 mm (1.6 in)
25 years
66.4 mm (2.6 in)
50 years
93.8 mm (3.7 in)
Longer than the 30 years of record
100 years
132.0 mm (5.2 in)
Longer than the 30 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, 30 years of values from 1947 to 2000.
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: 109.2 mm (4.3 in) in 1980; 96.5 mm (3.8 in) in 1988; 50.8 mm (2.0 in) in 1979.
Download the Data
Data for Umiat standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Umiat 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.