Record envelope, standing records and threshold days for Trout Lake (USC00058454), Colorado, United States, with 73 years of record.
Key Facts for Trout Lake
Trout Lake (USC00058454) is a weather station in Colorado, United States at 37.83 latitude and -107.88 longitude, 2,956 m (9,699 ft) above sea level.
The station reports from 1914 to 1986, 73 years of record.
1,464 records set at Trout Lake still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Trout Lake set a daily record precipitation of 18.3 mm (0.7 in) on 20 February 1986.
About the Station
Location: Colorado, United States, 37.83 latitude, -107.88 longitude.
Elevation: 2,956 m (9,699 ft).
Period of record: 1914 to 1986, 73 years.
Eligible elements: 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 Trout Lake. 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 Trout Lake, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
17.8 C (64.0 F)
-31.1 C (-24.0 F)
n/a
n/a
Feb
21.1 C (70.0 F)
-33.3 C (-27.9 F)
n/a
n/a
Mar
20.0 C (68.0 F)
-26.1 C (-15.0 F)
n/a
n/a
Apr
25.6 C (78.1 F)
-27.8 C (-18.0 F)
n/a
n/a
May
24.4 C (75.9 F)
-15.6 C (3.9 F)
n/a
n/a
Jun
29.4 C (84.9 F)
-10.0 C (14.0 F)
n/a
n/a
Jul
31.7 C (89.1 F)
-4.4 C (24.1 F)
n/a
n/a
Aug
28.9 C (84.0 F)
-5.6 C (21.9 F)
n/a
n/a
Sep
26.7 C (80.1 F)
-11.1 C (12.0 F)
n/a
n/a
Oct
23.3 C (73.9 F)
-18.9 C (-2.0 F)
n/a
n/a
Nov
23.3 C (73.9 F)
-25.6 C (-14.1 F)
n/a
n/a
Dec
20.0 C (68.0 F)
-30.0 C (-22.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Trout Lake still stand. 1918 holds the most, with 70.
Standing records at Trout Lake by the year they were set
Year set
Standing records
1915
34
1916
38
1917
55
1918
70
1919
46
1920
57
1921
19
1922
18
1924
2
1925
58
1926
40
1927
42
1928
34
1929
51
1930
38
1931
53
1932
50
1933
51
1934
69
1935
44
1936
44
1937
31
1938
45
1939
58
1940
44
1941
38
1942
36
1943
40
1944
54
1945
51
1946
59
1947
35
1948
58
1949
2
All-Time Record Progression
2 new records
2 all-time records were set at Trout Lake between 31 December 1951 and 18 December 1977. Each dot is a new record.
When Trout Lake set new all-time records
Date
Kind
Detail
1951-12-31
Record daily snowfall
Record daily snowfall 68.6 cm (27.0 in)
1977-12-18
Record daily snowfall
Record daily snowfall 71.1 cm (28.0 in)
Wettest Day of Each Month
May: 71.1 mm (2.8 in)
The wettest day on record for each calendar month at Trout Lake. The most was 71.1 mm (2.8 in) on 31 May 1930.
Record daily precipitation for each month at Trout Lake
Month
Record daily precipitation (mm)
Date
Jan
39.4 mm (1.6 in)
16 January 1978
Feb
43.7 mm (1.7 in)
15 February 1986
Mar
54.6 mm (2.1 in)
23 March 1929
Apr
43.2 mm (1.7 in)
2 April 1926
May
71.1 mm (2.8 in)
31 May 1930
Jun
36.8 mm (1.4 in)
3 June 1944
Jul
41.4 mm (1.6 in)
29 July 1982
Aug
40.9 mm (1.6 in)
24 August 1982
Sep
63.5 mm (2.5 in)
22 September 1941
Oct
44.5 mm (1.8 in)
13 October 1941
Nov
41.4 mm (1.6 in)
12 November 1978
Dec
38.1 mm (1.5 in)
31 December 1951
Period of Record Coverage
1915 to 1949
Complete yearUnder 90 percent of days
34 years of record at Trout Lake, 1915 to 1949. 9 years have data for under 90 percent of days and are left out of rankings: 1915, 1916, 1921, 1922, 1924, 1925, 1927, 1948 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 23 complete years at Trout Lake, 1917 to 1947. Blue stripes are years cooler than the station's own mean of 3.2 C (37.7 F); red stripes are warmer. The coolest year was 1946, at 1.0 C (33.7 F), and the warmest was 1939, at 4.3 C (39.8 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Trout Lake as warming stripes, 1917 to 1947
Year
Annual mean temperature
Difference from the station mean
1917
3.4 C
+0.23 C
1918
3.8 C
+0.56 C
1920
3.0 C
-0.15 C
1926
3.9 C
+0.72 C
1928
3.2 C
+0.04 C
1929
2.3 C
-0.90 C
1930
3.3 C
+0.06 C
1931
4.1 C
+0.93 C
1932
3.2 C
-0.04 C
1933
3.7 C
+0.51 C
1934
4.0 C
+0.82 C
1935
3.8 C
+0.63 C
1936
3.8 C
+0.62 C
1937
3.3 C
+0.14 C
1938
3.5 C
+0.33 C
1939
4.3 C
+1.13 C
1940
4.2 C
+0.98 C
1941
3.1 C
-0.09 C
1942
2.4 C
-0.77 C
1943
2.8 C
-0.41 C
1944
1.3 C
-1.89 C
1946
1.0 C
-2.24 C
1947
1.9 C
-1.29 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
1914 to 1986
Yearly extremes at Trout Lake: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
31.7 C (89.1 F)
1948
26.7 C (80.1 F)
34
Coldest night (TNn)
-33.3 C (-27.9 F)
1933
-26.9 C (-16.5 F)
34
Wettest day (Rx1day)
71.1 mm (2.8 in)
1930
30.7 mm (1.2 in)
55
Wettest five days (Rx5day)
123.1 mm (4.8 in)
1927
64.0 mm (2.5 in)
55
Longest dry spell (CDD)
46 days
1916
26 days
55
Hottest day (TXx)
The hottest day of the year at Trout Lake, 1914 to 1986. The record is 31.7 C (89.1 F) in 1948, marked on the chart; the median year is 26.7 C (80.1 F).
Hottest day (TXx) at Trout Lake by year
Year
Hottest day (TXx)
1914
n/a
1915
24.4 C (75.9 F)
1916
26.7 C (80.1 F)
1917
26.7 C (80.1 F)
1918
26.7 C (80.1 F)
1919
25.6 C (78.1 F)
1920
24.4 C (75.9 F)
1921
26.7 C (80.1 F)
1922
28.9 C (84.0 F)
1923
n/a
1924
14.4 C (57.9 F)
1925
27.8 C (82.0 F)
1926
27.8 C (82.0 F)
1927
25.6 C (78.1 F)
1928
24.4 C (75.9 F)
1929
25.6 C (78.1 F)
1930
26.7 C (80.1 F)
1931
31.1 C (88.0 F)
1932
26.7 C (80.1 F)
1933
27.8 C (82.0 F)
1934
28.9 C (84.0 F)
1935
27.8 C (82.0 F)
1936
29.4 C (84.9 F)
1937
27.8 C (82.0 F)
1938
27.8 C (82.0 F)
1939
30.0 C (86.0 F)
1940
28.9 C (84.0 F)
1941
28.9 C (84.0 F)
1942
28.9 C (84.0 F)
1943
26.7 C (80.1 F)
1944
25.6 C (78.1 F)
1945
26.7 C (80.1 F)
1946
24.4 C (75.9 F)
1947
28.9 C (84.0 F)
1948
31.7 C (89.1 F)
1949
3.3 C (37.9 F)
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
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
Coldest night (TNn)
The coldest night of the year at Trout Lake, 1914 to 1986. The record is -33.3 C (-27.9 F) in 1933, marked on the chart; the median year is -26.9 C (-16.5 F).
Coldest night (TNn) at Trout Lake by year
Year
Coldest night (TNn)
1914
n/a
1915
-23.3 C (-9.9 F)
1916
-28.9 C (-20.0 F)
1917
-28.9 C (-20.0 F)
1918
-24.4 C (-11.9 F)
1919
-30.0 C (-22.0 F)
1920
-23.3 C (-9.9 F)
1921
-25.6 C (-14.1 F)
1922
-17.8 C (0.0 F)
1923
n/a
1924
-21.1 C (-6.0 F)
1925
-22.2 C (-8.0 F)
1926
-27.8 C (-18.0 F)
1927
-26.7 C (-16.1 F)
1928
-24.4 C (-11.9 F)
1929
-27.8 C (-18.0 F)
1930
-27.8 C (-18.0 F)
1931
-27.8 C (-18.0 F)
1932
-26.7 C (-16.1 F)
1933
-33.3 C (-27.9 F)
1934
-22.2 C (-8.0 F)
1935
-30.0 C (-22.0 F)
1936
-25.6 C (-14.1 F)
1937
-30.0 C (-22.0 F)
1938
-25.6 C (-14.1 F)
1939
-28.9 C (-20.0 F)
1940
-27.2 C (-17.0 F)
1941
-24.4 C (-11.9 F)
1942
-31.1 C (-24.0 F)
1943
-31.1 C (-24.0 F)
1944
-26.1 C (-15.0 F)
1945
-28.9 C (-20.0 F)
1946
-29.4 C (-20.9 F)
1947
-30.0 C (-22.0 F)
1948
-23.3 C (-9.9 F)
1949
-24.4 C (-11.9 F)
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
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
Wettest day (Rx1day)
The wettest day of the year at Trout Lake, 1914 to 1986. The record is 71.1 mm (2.8 in) in 1930, marked on the chart; the median year is 30.7 mm (1.2 in).
Wettest day (Rx1day) at Trout Lake by year
Year
Wettest day (Rx1day)
1914
31.8 mm (1.3 in)
1915
53.8 mm (2.1 in)
1916
41.1 mm (1.6 in)
1917
17.8 mm (0.7 in)
1918
33.0 mm (1.3 in)
1919
20.3 mm (0.8 in)
1920
36.8 mm (1.4 in)
1921
22.9 mm (0.9 in)
1922
30.5 mm (1.2 in)
1923
35.1 mm (1.4 in)
1924
21.6 mm (0.9 in)
1925
29.2 mm (1.1 in)
1926
43.2 mm (1.7 in)
1927
40.6 mm (1.6 in)
1928
22.1 mm (0.9 in)
1929
54.6 mm (2.1 in)
1930
71.1 mm (2.8 in)
1931
25.4 mm (1.0 in)
1932
29.2 mm (1.1 in)
1933
25.4 mm (1.0 in)
1934
25.4 mm (1.0 in)
1935
31.8 mm (1.3 in)
1936
39.4 mm (1.6 in)
1937
35.6 mm (1.4 in)
1938
43.2 mm (1.7 in)
1939
22.9 mm (0.9 in)
1940
31.8 mm (1.3 in)
1941
63.5 mm (2.5 in)
1942
25.4 mm (1.0 in)
1943
30.5 mm (1.2 in)
1944
38.1 mm (1.5 in)
1945
25.4 mm (1.0 in)
1946
22.9 mm (0.9 in)
1947
43.2 mm (1.7 in)
1948
30.5 mm (1.2 in)
1949
28.4 mm (1.1 in)
1950
39.4 mm (1.6 in)
1951
38.1 mm (1.5 in)
1952
27.9 mm (1.1 in)
1953
42.7 mm (1.7 in)
1954
30.7 mm (1.2 in)
1955
27.9 mm (1.1 in)
1956
29.0 mm (1.1 in)
1957
22.9 mm (0.9 in)
1958
41.9 mm (1.6 in)
1977
30.5 mm (1.2 in)
1978
41.4 mm (1.6 in)
1979
27.9 mm (1.1 in)
1980
25.9 mm (1.0 in)
1981
29.0 mm (1.1 in)
1982
41.4 mm (1.6 in)
1983
24.4 mm (1.0 in)
1984
41.7 mm (1.6 in)
1985
34.0 mm (1.3 in)
1986
43.7 mm (1.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at Trout Lake, 1914 to 1986. The record is 123.1 mm (4.8 in) in 1927, marked on the chart; the median year is 64.0 mm (2.5 in).
Wettest five days (Rx5day) at Trout Lake by year
Year
Wettest five days (Rx5day)
1914
76.3 mm (3.0 in)
1915
71.2 mm (2.8 in)
1916
89.6 mm (3.5 in)
1917
32.5 mm (1.3 in)
1918
54.6 mm (2.1 in)
1919
51.0 mm (2.0 in)
1920
73.7 mm (2.9 in)
1921
68.6 mm (2.7 in)
1922
66.1 mm (2.6 in)
1923
59.4 mm (2.3 in)
1924
52.2 mm (2.1 in)
1925
63.5 mm (2.5 in)
1926
102.9 mm (4.1 in)
1927
123.1 mm (4.8 in)
1928
50.3 mm (2.0 in)
1929
82.6 mm (3.3 in)
1930
72.4 mm (2.9 in)
1931
39.4 mm (1.6 in)
1932
64.0 mm (2.5 in)
1933
36.6 mm (1.4 in)
1934
57.9 mm (2.3 in)
1935
65.1 mm (2.6 in)
1936
97.8 mm (3.9 in)
1937
55.4 mm (2.2 in)
1938
63.2 mm (2.5 in)
1939
53.7 mm (2.1 in)
1940
48.8 mm (1.9 in)
1941
87.9 mm (3.5 in)
1942
56.1 mm (2.2 in)
1943
59.0 mm (2.3 in)
1944
84.4 mm (3.3 in)
1945
48.5 mm (1.9 in)
1946
42.9 mm (1.7 in)
1947
106.5 mm (4.2 in)
1948
61.1 mm (2.4 in)
1949
57.4 mm (2.3 in)
1950
47.0 mm (1.9 in)
1951
84.4 mm (3.3 in)
1952
86.2 mm (3.4 in)
1953
74.8 mm (2.9 in)
1954
40.1 mm (1.6 in)
1955
58.7 mm (2.3 in)
1956
104.7 mm (4.1 in)
1957
42.8 mm (1.7 in)
1958
64.0 mm (2.5 in)
1977
40.6 mm (1.6 in)
1978
64.0 mm (2.5 in)
1979
38.3 mm (1.5 in)
1980
76.3 mm (3.0 in)
1981
68.0 mm (2.7 in)
1982
80.5 mm (3.2 in)
1983
76.7 mm (3.0 in)
1984
70.6 mm (2.8 in)
1985
89.7 mm (3.5 in)
1986
66.8 mm (2.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Trout Lake, 1914 to 1986. The record is 46 days in 1916, marked on the chart; the median year is 26 days.
Longest dry spell (CDD) at Trout Lake by year
Year
Longest dry spell (CDD)
1914
14 days
1915
43 days
1916
46 days
1917
44 days
1918
12 days
1919
18 days
1920
13 days
1921
15 days
1922
22 days
1923
33 days
1924
26 days
1925
25 days
1926
36 days
1927
26 days
1928
26 days
1929
33 days
1930
33 days
1931
28 days
1932
16 days
1933
23 days
1934
24 days
1935
46 days
1936
27 days
1937
23 days
1938
21 days
1939
32 days
1940
28 days
1941
16 days
1942
34 days
1943
16 days
1944
44 days
1945
27 days
1946
19 days
1947
12 days
1948
24 days
1949
27 days
1950
43 days
1951
28 days
1952
41 days
1953
30 days
1954
21 days
1955
27 days
1956
29 days
1957
32 days
1958
24 days
1977
13 days
1978
30 days
1979
20 days
1980
38 days
1981
21 days
1982
23 days
1983
16 days
1984
15 days
1985
26 days
1986
16 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 Trout Lake falls on 21 June and the median first autumn frost on 9 July, which leaves a median of 19 days between them.
Frost dates and growing season at Trout Lake
Measure
Median, all years
Earliest period
Recent period (1917 to 1947)
Recent against earliest
Fitted trend
Last spring frost
21 June
n/a
21 June
n/a
n/a
First autumn frost
9 July
n/a
9 July
n/a
n/a
Growing days
19 days
n/a
19 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
42 years, 1916 to 1985
A day with at least 32.1 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 71.5 mm (2.8 in) of rain is expected about once in 100 years.
Rainfall return levels at Trout Lake: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
32.1 mm (1.3 in)
5 years
41.6 mm (1.6 in)
10 years
48.3 mm (1.9 in)
25 years
57.2 mm (2.3 in)
50 years
64.2 mm (2.5 in)
Longer than the 42 years of record
100 years
71.5 mm (2.8 in)
Longer than the 42 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, 42 years of values from 1916 to 1985.
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: 71.1 mm (2.8 in) in 1930; 63.5 mm (2.5 in) in 1941; 54.6 mm (2.1 in) in 1929.
Download the Data
Data for Trout Lake standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Trout Lake 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.