Record envelope, standing records and threshold days for Alva 5 ESE (USC00480200), Wyoming, United States, with 54 years of record.
Key Facts for Alva 5 ESE
Alva 5 ESE (USC00480200) is a weather station in Wyoming, United States at 44.65 latitude and -104.35 longitude, 1,338 m (4,390 ft) above sea level.
The station reports from 1948 to 2001, 54 years of record.
1,464 records set at Alva 5 ESE still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Alva 5 ESE set a daily record high maximum temperature of 20.6 C (69.1 F) on 18 November 2001.
About the Station
Location: Wyoming, United States, 44.65 latitude, -104.35 longitude.
Elevation: 1,338 m (4,390 ft).
Period of record: 1948 to 2001, 54 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 Alva 5 ESE. 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 Alva 5 ESE, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
21.1 C (70.0 F)
-36.7 C (-34.1 F)
n/a
n/a
Feb
20.0 C (68.0 F)
-35.0 C (-31.0 F)
n/a
n/a
Mar
23.3 C (73.9 F)
-34.4 C (-29.9 F)
n/a
n/a
Apr
30.0 C (86.0 F)
-25.6 C (-14.1 F)
n/a
n/a
May
33.9 C (93.0 F)
-19.4 C (-2.9 F)
n/a
n/a
Jun
37.8 C (100.0 F)
-4.4 C (24.1 F)
n/a
n/a
Jul
38.9 C (102.0 F)
-1.7 C (28.9 F)
n/a
n/a
Aug
37.8 C (100.0 F)
-2.2 C (28.0 F)
n/a
n/a
Sep
37.8 C (100.0 F)
-11.7 C (10.9 F)
n/a
n/a
Oct
30.6 C (87.1 F)
-20.6 C (-5.1 F)
n/a
n/a
Nov
23.3 C (73.9 F)
-33.9 C (-29.0 F)
n/a
n/a
Dec
17.8 C (64.0 F)
-37.8 C (-36.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Alva 5 ESE still stand. 1950 holds the most, with 69.
Standing records at Alva 5 ESE by the year they were set
Year set
Standing records
1948
20
1949
51
1950
69
1951
53
1952
49
1953
50
1954
57
1955
47
1956
31
1957
41
1958
45
1959
33
1960
47
1961
34
1962
37
1963
38
1964
28
1965
49
1966
37
1967
21
1968
37
1969
36
1970
24
1971
31
1972
40
1973
27
1974
32
1975
32
1976
25
1977
27
1978
27
1979
30
1980
35
1981
25
1982
19
1983
41
1984
29
1985
57
1986
30
2001
23
All-Time Record Progression
2 new records
2 all-time records were set at Alva 5 ESE between 6 July 1981 and 27 April 1984. Each dot is a new record.
When Alva 5 ESE set new all-time records
Date
Kind
Detail
1981-07-06
Record high maximum temperature
Record high maximum temperature 38.9 C (102.0 F)
1984-04-27
Record snow depth
Record snow depth 109.2 cm (43.0 in)
Wettest Day of Each Month
Aug: 103.4 mm (4.1 in)
The wettest day on record for each calendar month at Alva 5 ESE. The most was 103.4 mm (4.1 in) on 21 August 1964.
Record daily precipitation for each month at Alva 5 ESE
Month
Record daily precipitation (mm)
Date
Jan
13.0 mm (0.5 in)
21 January 1986
Feb
15.2 mm (0.6 in)
9 February 1953
Mar
44.7 mm (1.8 in)
14 March 1973
Apr
52.8 mm (2.1 in)
16 April 1976
May
79.0 mm (3.1 in)
18 May 1962
Jun
93.7 mm (3.7 in)
14 June 1976
Jul
55.1 mm (2.2 in)
12 July 1952
Aug
103.4 mm (4.1 in)
21 August 1964
Sep
65.3 mm (2.6 in)
14 September 1982
Oct
65.3 mm (2.6 in)
9 October 1982
Nov
49.5 mm (1.9 in)
3 November 1956
Dec
17.5 mm (0.7 in)
11 December 1949
Period of Record Coverage
1948 to 2001
Complete yearUnder 90 percent of days
40 years of record at Alva 5 ESE, 1948 to 2001. 2 years have data for under 90 percent of days and are left out of rankings: 1948, 2001.
Cooler than the station meanWarmer than the station mean
One stripe for each of 36 complete years at Alva 5 ESE, 1949 to 1985. Blue stripes are years cooler than the station's own mean of 5.4 C (41.7 F); red stripes are warmer. The coolest year was 1951, at 4.0 C (39.3 F), and the warmest was 1981, at 6.9 C (44.4 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Alva 5 ESE as warming stripes, 1949 to 1985
Year
Annual mean temperature
Difference from the station mean
1949
5.4 C
+0.04 C
1950
4.5 C
-0.84 C
1951
4.0 C
-1.35 C
1952
6.2 C
+0.77 C
1953
6.8 C
+1.39 C
1954
6.8 C
+1.39 C
1955
5.3 C
-0.07 C
1956
6.0 C
+0.62 C
1957
5.4 C
+0.06 C
1958
6.1 C
+0.73 C
1959
5.2 C
-0.14 C
1960
5.3 C
-0.09 C
1961
5.8 C
+0.41 C
1962
5.3 C
-0.05 C
1963
6.2 C
+0.81 C
1964
5.0 C
-0.41 C
1965
4.9 C
-0.50 C
1966
5.3 C
-0.11 C
1967
5.3 C
-0.06 C
1968
5.0 C
-0.37 C
1969
5.3 C
-0.09 C
1971
4.8 C
-0.62 C
1972
4.6 C
-0.75 C
1973
5.3 C
-0.09 C
1974
5.6 C
+0.26 C
1975
4.7 C
-0.69 C
1976
5.9 C
+0.52 C
1977
5.8 C
+0.38 C
1978
4.3 C
-1.06 C
1979
5.0 C
-0.43 C
1980
6.2 C
+0.78 C
1981
6.9 C
+1.53 C
1982
4.5 C
-0.87 C
1983
5.3 C
-0.07 C
1984
5.3 C
-0.07 C
1985
4.4 C
-0.98 C
The fitted trend in annual mean temperature here over 1949 to 1985 is -0.1 C (-0.3 to 0.1) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.2 F (-0.6 to 0.2) per decade. The slope is a straight line fitted to 36 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Alva 5 ESE
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.1 C (-0.3 to 0.1) per decade
-0.2 F (-0.6 to 0.2) per decade
1949 to 1985
36
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.3 to 0.2) per decade
-0.1 F (-0.5 to 0.4) per decade
1949 to 1985
36
Not clearly different from zero
Mean daily minimum
-0.18 C (-0.41 to 0.04) per decade
-0.3 F (-0.7 to 0.1) per decade
1949 to 1985
36
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
1948 to 2001
Yearly extremes at Alva 5 ESE: 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)
1981
36.1 C (97.0 F)
40
Coldest night (TNn)
-37.8 C (-36.0 F)
1968
-33.6 C (-28.5 F)
40
Wettest day (Rx1day)
103.4 mm (4.1 in)
1964
40.3 mm (1.6 in)
40
Wettest five days (Rx5day)
170.4 mm (6.7 in)
1962
61.8 mm (2.4 in)
40
Longest dry spell (CDD)
52 days
1952
23 days
40
Hottest day (TXx)
The hottest day of the year at Alva 5 ESE, 1948 to 2001. The record is 38.9 C (102.0 F) in 1981, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Alva 5 ESE by year
Year
Hottest day (TXx)
1948
37.2 C (99.0 F)
1949
37.8 C (100.0 F)
1950
34.4 C (93.9 F)
1951
36.7 C (98.1 F)
1952
37.2 C (99.0 F)
1953
33.9 C (93.0 F)
1954
37.8 C (100.0 F)
1955
34.4 C (93.9 F)
1956
33.9 C (93.0 F)
1957
36.7 C (98.1 F)
1958
35.0 C (95.0 F)
1959
35.6 C (96.1 F)
1960
37.8 C (100.0 F)
1961
37.8 C (100.0 F)
1962
33.3 C (91.9 F)
1963
33.3 C (91.9 F)
1964
35.0 C (95.0 F)
1965
36.7 C (98.1 F)
1966
37.8 C (100.0 F)
1967
33.3 C (91.9 F)
1968
32.2 C (90.0 F)
1969
36.7 C (98.1 F)
1970
36.1 C (97.0 F)
1971
34.4 C (93.9 F)
1972
35.0 C (95.0 F)
1973
36.7 C (98.1 F)
1974
35.0 C (95.0 F)
1975
36.1 C (97.0 F)
1976
35.6 C (96.1 F)
1977
36.1 C (97.0 F)
1978
37.8 C (100.0 F)
1979
35.0 C (95.0 F)
1980
37.8 C (100.0 F)
1981
38.9 C (102.0 F)
1982
35.0 C (95.0 F)
1983
36.1 C (97.0 F)
1984
34.4 C (93.9 F)
1985
36.1 C (97.0 F)
1986
35.6 C (96.1 F)
2001
36.7 C (98.1 F)
Coldest night (TNn)
The coldest night of the year at Alva 5 ESE, 1948 to 2001. The record is -37.8 C (-36.0 F) in 1968, marked on the chart; the median year is -33.6 C (-28.5 F).
Coldest night (TNn) at Alva 5 ESE by year
Year
Coldest night (TNn)
1948
-22.2 C (-8.0 F)
1949
-35.6 C (-32.1 F)
1950
-36.7 C (-34.1 F)
1951
-31.1 C (-24.0 F)
1952
-34.4 C (-29.9 F)
1953
-26.7 C (-16.1 F)
1954
-32.8 C (-27.0 F)
1955
-32.2 C (-26.0 F)
1956
-31.1 C (-24.0 F)
1957
-35.6 C (-32.1 F)
1958
-28.3 C (-18.9 F)
1959
-33.9 C (-29.0 F)
1960
-34.4 C (-29.9 F)
1961
-28.9 C (-20.0 F)
1962
-35.6 C (-32.1 F)
1963
-33.3 C (-27.9 F)
1964
-33.9 C (-29.0 F)
1965
-34.4 C (-29.9 F)
1966
-32.8 C (-27.0 F)
1967
-33.3 C (-27.9 F)
1968
-37.8 C (-36.0 F)
1969
-28.9 C (-20.0 F)
1970
-36.1 C (-33.0 F)
1971
-32.8 C (-27.0 F)
1972
-36.1 C (-33.0 F)
1973
-36.1 C (-33.0 F)
1974
-36.1 C (-33.0 F)
1975
-33.3 C (-27.9 F)
1976
-33.9 C (-29.0 F)
1977
-36.7 C (-34.1 F)
1978
-37.2 C (-35.0 F)
1979
-33.3 C (-27.9 F)
1980
-32.8 C (-27.0 F)
1981
-30.0 C (-22.0 F)
1982
-35.0 C (-31.0 F)
1983
-36.7 C (-34.1 F)
1984
-29.4 C (-20.9 F)
1985
-36.1 C (-33.0 F)
1986
-32.8 C (-27.0 F)
2001
-25.0 C (-13.0 F)
Wettest day (Rx1day)
The wettest day of the year at Alva 5 ESE, 1948 to 2001. The record is 103.4 mm (4.1 in) in 1964, marked on the chart; the median year is 40.3 mm (1.6 in).
Wettest day (Rx1day) at Alva 5 ESE by year
Year
Wettest day (Rx1day)
1948
32.8 mm (1.3 in)
1949
35.6 mm (1.4 in)
1950
19.3 mm (0.8 in)
1951
28.4 mm (1.1 in)
1952
55.1 mm (2.2 in)
1953
51.1 mm (2.0 in)
1954
25.4 mm (1.0 in)
1955
50.0 mm (2.0 in)
1956
49.5 mm (1.9 in)
1957
28.4 mm (1.1 in)
1958
26.9 mm (1.1 in)
1959
33.5 mm (1.3 in)
1960
53.1 mm (2.1 in)
1961
21.8 mm (0.9 in)
1962
79.0 mm (3.1 in)
1963
28.2 mm (1.1 in)
1964
103.4 mm (4.1 in)
1965
46.2 mm (1.8 in)
1966
36.6 mm (1.4 in)
1967
39.1 mm (1.5 in)
1968
47.2 mm (1.9 in)
1969
33.3 mm (1.3 in)
1970
82.8 mm (3.3 in)
1971
61.2 mm (2.4 in)
1972
32.0 mm (1.3 in)
1973
44.7 mm (1.8 in)
1974
41.1 mm (1.6 in)
1975
30.0 mm (1.2 in)
1976
93.7 mm (3.7 in)
1977
39.4 mm (1.6 in)
1978
46.5 mm (1.8 in)
1979
43.9 mm (1.7 in)
1980
29.0 mm (1.1 in)
1981
33.3 mm (1.3 in)
1982
65.5 mm (2.6 in)
1983
23.6 mm (0.9 in)
1984
76.2 mm (3.0 in)
1985
29.2 mm (1.1 in)
1986
55.9 mm (2.2 in)
2001
50.8 mm (2.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Alva 5 ESE, 1948 to 2001. The record is 170.4 mm (6.7 in) in 1962, marked on the chart; the median year is 61.8 mm (2.4 in).
Wettest five days (Rx5day) at Alva 5 ESE by year
Year
Wettest five days (Rx5day)
1948
45.8 mm (1.8 in)
1949
40.7 mm (1.6 in)
1950
33.6 mm (1.3 in)
1951
46.7 mm (1.8 in)
1952
94.0 mm (3.7 in)
1953
80.5 mm (3.2 in)
1954
39.6 mm (1.6 in)
1955
82.7 mm (3.3 in)
1956
58.7 mm (2.3 in)
1957
64.5 mm (2.5 in)
1958
49.8 mm (2.0 in)
1959
57.9 mm (2.3 in)
1960
53.1 mm (2.1 in)
1961
26.6 mm (1.0 in)
1962
170.4 mm (6.7 in)
1963
52.9 mm (2.1 in)
1964
112.0 mm (4.4 in)
1965
68.7 mm (2.7 in)
1966
46.8 mm (1.8 in)
1967
110.4 mm (4.3 in)
1968
63.7 mm (2.5 in)
1969
75.0 mm (3.0 in)
1970
87.6 mm (3.4 in)
1971
99.6 mm (3.9 in)
1972
62.2 mm (2.4 in)
1973
88.2 mm (3.5 in)
1974
69.0 mm (2.7 in)
1975
58.7 mm (2.3 in)
1976
165.2 mm (6.5 in)
1977
61.3 mm (2.4 in)
1978
124.0 mm (4.9 in)
1979
59.4 mm (2.3 in)
1980
48.8 mm (1.9 in)
1981
53.8 mm (2.1 in)
1982
135.6 mm (5.3 in)
1983
34.4 mm (1.4 in)
1984
114.5 mm (4.5 in)
1985
41.5 mm (1.6 in)
1986
72.9 mm (2.9 in)
2001
57.4 mm (2.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Alva 5 ESE, 1948 to 2001. The record is 52 days in 1952, marked on the chart; the median year is 23 days.
Longest dry spell (CDD) at Alva 5 ESE by year
Year
Longest dry spell (CDD)
1948
23 days
1949
20 days
1950
25 days
1951
20 days
1952
52 days
1953
26 days
1954
24 days
1955
13 days
1956
16 days
1957
34 days
1958
18 days
1959
34 days
1960
36 days
1961
20 days
1962
22 days
1963
35 days
1964
20 days
1965
42 days
1966
22 days
1967
32 days
1968
23 days
1969
42 days
1970
25 days
1971
21 days
1972
15 days
1973
19 days
1974
24 days
1975
29 days
1976
28 days
1977
15 days
1978
23 days
1979
18 days
1980
29 days
1981
27 days
1982
19 days
1983
21 days
1984
15 days
1985
19 days
1986
24 days
2001
31 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
36 years with a frost
Across 36 years with a frost, the median last spring frost at Alva 5 ESE falls on 10 June and the median first autumn frost on 1 September, which leaves a median of 81 days between them.
Fitted over all years, the growing season changes by -0.2 days per decade at this station.
Frost dates and growing season at Alva 5 ESE
Measure
Median, all years
Earliest period
Recent period (1955 to 1985)
Recent against earliest
Fitted trend
Last spring frost
10 June
n/a
11 June
n/a
+1.9 days per decade
First autumn frost
1 September
n/a
1 September
n/a
+1.7 days per decade
Growing days
81 days
n/a
81 days
n/a
-0.2 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.
Rainfall Return Levels
38 years, 1949 to 1986
A day with at least 40.2 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 124.6 mm (4.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Alva 5 ESE: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
40.2 mm (1.6 in)
5 years
57.7 mm (2.3 in)
10 years
71.2 mm (2.8 in)
25 years
90.4 mm (3.6 in)
50 years
106.7 mm (4.2 in)
Longer than the 38 years of record
100 years
124.6 mm (4.9 in)
Longer than the 38 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, 38 years of values from 1949 to 1986.
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: 103.4 mm (4.1 in) in 1964; 93.7 mm (3.7 in) in 1976; 82.8 mm (3.3 in) in 1970.
Download the Data
Data for Alva 5 ESE standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Alva 5 ESE 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.