Record envelope, standing records and threshold days for Idalia (USC00054242), Colorado, United States, with 81 years of record.
Key Facts for Idalia
Idalia (USC00054242) is a weather station in Colorado, United States at 39.70 latitude and -102.29 longitude, 1,209 m (3,965 ft) above sea level.
The station reports from 1941 to 2021, 81 years of record.
1,464 records set at Idalia still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Idalia set a daily record precipitation of 16.5 mm (0.6 in) on 15 March 2021.
About the Station
Location: Colorado, United States, 39.70 latitude, -102.29 longitude.
Elevation: 1,209 m (3,965 ft).
Period of record: 1941 to 2021, 81 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 Idalia. 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 Idalia, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
23.9 C (75.0 F)
-32.8 C (-27.0 F)
n/a
n/a
Feb
27.2 C (81.0 F)
-31.1 C (-24.0 F)
n/a
n/a
Mar
28.9 C (84.0 F)
-23.9 C (-11.0 F)
n/a
n/a
Apr
33.3 C (91.9 F)
-14.4 C (6.1 F)
n/a
n/a
May
37.2 C (99.0 F)
-4.4 C (24.1 F)
n/a
n/a
Jun
43.3 C (109.9 F)
0.6 C (33.1 F)
n/a
n/a
Jul
41.7 C (107.1 F)
2.2 C (36.0 F)
n/a
n/a
Aug
40.0 C (104.0 F)
4.4 C (39.9 F)
n/a
n/a
Sep
38.3 C (100.9 F)
-3.3 C (26.1 F)
n/a
n/a
Oct
33.9 C (93.0 F)
-17.8 C (0.0 F)
n/a
n/a
Nov
28.3 C (82.9 F)
-21.7 C (-7.1 F)
n/a
n/a
Dec
25.6 C (78.1 F)
-32.2 C (-26.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Idalia still stand. 1989 holds the most, with 67.
Standing records at Idalia by the year they were set
Year set
Standing records
1941
9
1942
2
1946
1
1987
10
1988
53
1989
67
1990
51
1991
49
1992
52
1993
50
1994
24
1995
62
1996
55
1997
54
1998
41
1999
25
2000
52
2001
38
2002
50
2003
49
2004
39
2005
50
2006
42
2007
33
2008
33
2009
47
2010
25
2011
40
2012
44
2013
48
2014
39
2015
35
2016
29
2017
26
2018
29
2019
48
2020
50
2021
13
All-Time Record Progression
3 new records
3 all-time records were set at Idalia between 20 January 1990 and 3 February 2016. Each dot is a new record.
When Idalia set new all-time records
Date
Kind
Detail
1990-01-20
Record snow depth
Record snow depth 33.0 cm (13.0 in)
2016-02-02
Record snow depth
Record snow depth 35.6 cm (14.0 in)
2016-02-03
Record snow depth
Record snow depth 38.1 cm (15.0 in)
Wettest Day of Each Month
Jul: 126.0 mm (5.0 in)
The wettest day on record for each calendar month at Idalia. The most was 126.0 mm (5.0 in) on 19 July 1946.
Record daily precipitation for each month at Idalia
Month
Record daily precipitation (mm)
Date
Jan
30.5 mm (1.2 in)
20 January 1990
Feb
27.9 mm (1.1 in)
2 February 2016
Mar
71.6 mm (2.8 in)
14 March 2021
Apr
84.1 mm (3.3 in)
3 April 1983
May
95.0 mm (3.7 in)
31 May 1995
Jun
91.2 mm (3.6 in)
16 June 1963
Jul
126.0 mm (5.0 in)
19 July 1946
Aug
92.7 mm (3.6 in)
28 August 1968
Sep
114.6 mm (4.5 in)
2 September 1942
Oct
53.3 mm (2.1 in)
11 October 2005
Nov
121.9 mm (4.8 in)
27 November 1983
Dec
23.1 mm (0.9 in)
15 December 2014
Period of Record Coverage
1941 to 2021
Complete yearUnder 90 percent of days
37 years of record at Idalia, 1941 to 2021. 13 years have data for under 90 percent of days and are left out of rankings: 1941, 1942, 1987, 1989, 1990, 1994, 2004, 2006 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 20 complete years at Idalia, 1988 to 2020. Blue stripes are years cooler than the station's own mean of 10.3 C (50.6 F); red stripes are warmer. The coolest year was 2009, at 9.3 C (48.8 F), and the warmest was 2015, at 11.3 C (52.4 F). The strongest colour marks a difference of 1.1 C (2.0 F).
Annual mean temperature at Idalia as warming stripes, 1988 to 2020
Year
Annual mean temperature
Difference from the station mean
1988
9.5 C
-0.83 C
1991
10.1 C
-0.22 C
1995
10.2 C
-0.15 C
1997
10.0 C
-0.35 C
1998
10.7 C
+0.35 C
2000
10.5 C
+0.12 C
2001
10.9 C
+0.59 C
2002
10.5 C
+0.16 C
2003
10.9 C
+0.55 C
2005
11.1 C
+0.79 C
2007
9.6 C
-0.72 C
2009
9.3 C
-1.02 C
2013
9.8 C
-0.52 C
2014
9.8 C
-0.53 C
2015
11.3 C
+0.99 C
2016
11.3 C
+0.96 C
2017
10.9 C
+0.56 C
2018
10.0 C
-0.38 C
2019
9.4 C
-0.91 C
2020
10.9 C
+0.52 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
1941 to 2021
Yearly extremes at Idalia: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
43.3 C (109.9 F)
2012
38.9 C (102.0 F)
37
Coldest night (TNn)
-32.8 C (-27.0 F)
1942
-23.6 C (-10.5 F)
38
Wettest day (Rx1day)
126.0 mm (5.0 in)
1946
47.5 mm (1.9 in)
80
Wettest five days (Rx5day)
156.9 mm (6.2 in)
1946
68.6 mm (2.7 in)
80
Longest dry spell (CDD)
72 days
1972
37 days
80
Hottest day (TXx)
The hottest day of the year at Idalia, 1941 to 2021. The record is 43.3 C (109.9 F) in 2012, marked on the chart; the median year is 38.9 C (102.0 F).
Hottest day (TXx) at Idalia by year
Year
Hottest day (TXx)
1941
37.2 C (99.0 F)
1942
6.1 C (43.0 F)
1943
n/a
1944
n/a
1945
n/a
1946
n/a
1947
n/a
1948
n/a
1949
n/a
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
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
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
33.3 C (91.9 F)
1988
37.8 C (100.0 F)
1989
38.9 C (102.0 F)
1990
41.1 C (106.0 F)
1991
37.8 C (100.0 F)
1992
36.7 C (98.1 F)
1993
38.9 C (102.0 F)
1994
37.8 C (100.0 F)
1995
40.0 C (104.0 F)
1996
37.8 C (100.0 F)
1997
38.3 C (100.9 F)
1998
39.4 C (102.9 F)
1999
37.8 C (100.0 F)
2000
38.9 C (102.0 F)
2001
38.3 C (100.9 F)
2002
40.0 C (104.0 F)
2003
40.0 C (104.0 F)
2004
38.9 C (102.0 F)
2005
41.7 C (107.1 F)
2006
39.4 C (102.9 F)
2007
38.3 C (100.9 F)
2008
40.0 C (104.0 F)
2009
36.1 C (97.0 F)
2010
38.9 C (102.0 F)
2011
38.9 C (102.0 F)
2012
43.3 C (109.9 F)
2013
40.0 C (104.0 F)
2014
38.9 C (102.0 F)
2015
37.2 C (99.0 F)
2016
38.9 C (102.0 F)
2017
37.8 C (100.0 F)
2018
38.9 C (102.0 F)
2019
40.0 C (104.0 F)
2020
38.3 C (100.9 F)
2021
22.2 C (72.0 F)
Coldest night (TNn)
The coldest night of the year at Idalia, 1941 to 2021. The record is -32.8 C (-27.0 F) in 1942, marked on the chart; the median year is -23.6 C (-10.5 F).
Coldest night (TNn) at Idalia by year
Year
Coldest night (TNn)
1941
-17.8 C (0.0 F)
1942
-32.8 C (-27.0 F)
1943
n/a
1944
n/a
1945
n/a
1946
-2.2 C (28.0 F)
1947
n/a
1948
n/a
1949
n/a
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
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
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
-19.4 C (-2.9 F)
1988
-24.4 C (-11.9 F)
1989
-32.2 C (-26.0 F)
1990
-30.6 C (-23.1 F)
1991
-19.4 C (-2.9 F)
1992
-21.1 C (-6.0 F)
1993
-23.9 C (-11.0 F)
1994
-21.1 C (-6.0 F)
1995
-23.3 C (-9.9 F)
1996
-28.3 C (-18.9 F)
1997
-25.6 C (-14.1 F)
1998
-27.8 C (-18.0 F)
1999
-17.2 C (1.0 F)
2000
-19.4 C (-2.9 F)
2001
-17.2 C (1.0 F)
2002
-20.0 C (-4.0 F)
2003
-20.6 C (-5.1 F)
2004
-26.7 C (-16.1 F)
2005
-26.1 C (-15.0 F)
2006
-21.7 C (-7.1 F)
2007
-24.4 C (-11.9 F)
2008
-24.4 C (-11.9 F)
2009
-24.4 C (-11.9 F)
2010
-22.8 C (-9.0 F)
2011
-26.1 C (-15.0 F)
2012
-22.2 C (-8.0 F)
2013
-21.1 C (-6.0 F)
2014
-27.2 C (-17.0 F)
2015
-25.6 C (-14.1 F)
2016
-27.8 C (-18.0 F)
2017
-22.2 C (-8.0 F)
2018
-21.7 C (-7.1 F)
2019
-23.9 C (-11.0 F)
2020
-18.3 C (-0.9 F)
2021
-31.1 C (-24.0 F)
Wettest day (Rx1day)
The wettest day of the year at Idalia, 1941 to 2021. The record is 126.0 mm (5.0 in) in 1946, marked on the chart; the median year is 47.5 mm (1.9 in).
Wettest day (Rx1day) at Idalia by year
Year
Wettest day (Rx1day)
1941
37.6 mm (1.5 in)
1942
114.6 mm (4.5 in)
1943
34.5 mm (1.4 in)
1944
38.1 mm (1.5 in)
1945
55.9 mm (2.2 in)
1946
126.0 mm (5.0 in)
1947
46.7 mm (1.8 in)
1948
65.5 mm (2.6 in)
1949
66.5 mm (2.6 in)
1950
43.4 mm (1.7 in)
1951
34.0 mm (1.3 in)
1952
34.5 mm (1.4 in)
1953
37.8 mm (1.5 in)
1954
18.5 mm (0.7 in)
1955
40.6 mm (1.6 in)
1956
24.9 mm (1.0 in)
1957
58.4 mm (2.3 in)
1958
34.0 mm (1.3 in)
1959
42.2 mm (1.7 in)
1960
28.4 mm (1.1 in)
1961
33.0 mm (1.3 in)
1962
48.0 mm (1.9 in)
1963
91.2 mm (3.6 in)
1964
27.9 mm (1.1 in)
1965
64.0 mm (2.5 in)
1966
60.5 mm (2.4 in)
1967
35.6 mm (1.4 in)
1968
92.7 mm (3.6 in)
1969
48.3 mm (1.9 in)
1970
32.0 mm (1.3 in)
1971
53.3 mm (2.1 in)
1972
53.3 mm (2.1 in)
1973
38.6 mm (1.5 in)
1974
37.1 mm (1.5 in)
1975
18.3 mm (0.7 in)
1977
81.0 mm (3.2 in)
1978
25.7 mm (1.0 in)
1979
48.8 mm (1.9 in)
1980
48.3 mm (1.9 in)
1981
30.7 mm (1.2 in)
1982
20.6 mm (0.8 in)
1983
121.9 mm (4.8 in)
1984
47.0 mm (1.9 in)
1985
42.7 mm (1.7 in)
1986
36.1 mm (1.4 in)
1987
27.9 mm (1.1 in)
1988
85.1 mm (3.4 in)
1989
50.8 mm (2.0 in)
1990
32.3 mm (1.3 in)
1991
46.5 mm (1.8 in)
1992
62.7 mm (2.5 in)
1993
27.9 mm (1.1 in)
1994
25.7 mm (1.0 in)
1995
95.0 mm (3.7 in)
1996
64.8 mm (2.6 in)
1997
55.1 mm (2.2 in)
1998
63.5 mm (2.5 in)
1999
25.4 mm (1.0 in)
2000
45.7 mm (1.8 in)
2001
38.1 mm (1.5 in)
2002
25.4 mm (1.0 in)
2003
41.9 mm (1.6 in)
2004
25.4 mm (1.0 in)
2005
53.3 mm (2.1 in)
2006
68.6 mm (2.7 in)
2007
54.6 mm (2.1 in)
2008
50.8 mm (2.0 in)
2009
45.7 mm (1.8 in)
2010
48.3 mm (1.9 in)
2011
50.8 mm (2.0 in)
2012
48.3 mm (1.9 in)
2013
48.8 mm (1.9 in)
2014
66.0 mm (2.6 in)
2015
66.0 mm (2.6 in)
2016
67.3 mm (2.6 in)
2017
66.0 mm (2.6 in)
2018
44.5 mm (1.8 in)
2019
64.8 mm (2.6 in)
2020
65.0 mm (2.6 in)
2021
71.6 mm (2.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Idalia, 1941 to 2021. The record is 156.9 mm (6.2 in) in 1946, marked on the chart; the median year is 68.6 mm (2.7 in).
Wettest five days (Rx5day) at Idalia by year
Year
Wettest five days (Rx5day)
1941
74.2 mm (2.9 in)
1942
120.7 mm (4.8 in)
1943
41.1 mm (1.6 in)
1944
58.1 mm (2.3 in)
1945
82.6 mm (3.3 in)
1946
156.9 mm (6.2 in)
1947
51.5 mm (2.0 in)
1948
65.5 mm (2.6 in)
1949
70.0 mm (2.8 in)
1950
85.6 mm (3.4 in)
1951
81.6 mm (3.2 in)
1952
46.2 mm (1.8 in)
1953
51.3 mm (2.0 in)
1954
31.2 mm (1.2 in)
1955
60.7 mm (2.4 in)
1956
78.0 mm (3.1 in)
1957
94.0 mm (3.7 in)
1958
37.3 mm (1.5 in)
1959
53.4 mm (2.1 in)
1960
39.0 mm (1.5 in)
1961
39.9 mm (1.6 in)
1962
63.5 mm (2.5 in)
1963
91.2 mm (3.6 in)
1964
46.4 mm (1.8 in)
1965
104.8 mm (4.1 in)
1966
79.3 mm (3.1 in)
1967
47.2 mm (1.9 in)
1968
96.5 mm (3.8 in)
1969
63.9 mm (2.5 in)
1970
56.6 mm (2.2 in)
1971
73.1 mm (2.9 in)
1972
115.5 mm (4.5 in)
1973
78.2 mm (3.1 in)
1974
70.1 mm (2.8 in)
1975
30.2 mm (1.2 in)
1977
90.4 mm (3.6 in)
1978
42.2 mm (1.7 in)
1979
50.1 mm (2.0 in)
1980
79.8 mm (3.1 in)
1981
38.5 mm (1.5 in)
1982
36.9 mm (1.5 in)
1983
136.9 mm (5.4 in)
1984
66.5 mm (2.6 in)
1985
62.8 mm (2.5 in)
1986
43.7 mm (1.7 in)
1987
73.6 mm (2.9 in)
1988
86.4 mm (3.4 in)
1989
55.6 mm (2.2 in)
1990
37.3 mm (1.5 in)
1991
61.8 mm (2.4 in)
1992
86.1 mm (3.4 in)
1993
51.5 mm (2.0 in)
1994
35.9 mm (1.4 in)
1995
136.4 mm (5.4 in)
1996
105.9 mm (4.2 in)
1997
78.1 mm (3.1 in)
1998
68.6 mm (2.7 in)
1999
35.6 mm (1.4 in)
2000
53.4 mm (2.1 in)
2001
66.1 mm (2.6 in)
2002
52.8 mm (2.1 in)
2003
61.9 mm (2.4 in)
2004
48.2 mm (1.9 in)
2005
107.1 mm (4.2 in)
2006
68.6 mm (2.7 in)
2007
76.7 mm (3.0 in)
2008
55.9 mm (2.2 in)
2009
67.9 mm (2.7 in)
2010
89.7 mm (3.5 in)
2011
88.9 mm (3.5 in)
2012
71.1 mm (2.8 in)
2013
77.3 mm (3.0 in)
2014
70.1 mm (2.8 in)
2015
97.1 mm (3.8 in)
2016
95.5 mm (3.8 in)
2017
83.8 mm (3.3 in)
2018
47.0 mm (1.9 in)
2019
89.5 mm (3.5 in)
2020
71.6 mm (2.8 in)
2021
88.6 mm (3.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Idalia, 1941 to 2021. The record is 72 days in 1972, marked on the chart; the median year is 37 days.
Longest dry spell (CDD) at Idalia by year
Year
Longest dry spell (CDD)
1941
22 days
1942
30 days
1943
32 days
1944
31 days
1945
53 days
1946
42 days
1947
29 days
1948
32 days
1949
49 days
1950
47 days
1951
43 days
1952
40 days
1953
61 days
1954
58 days
1955
44 days
1956
54 days
1957
46 days
1958
40 days
1959
57 days
1960
24 days
1961
62 days
1962
44 days
1963
58 days
1964
62 days
1965
51 days
1966
52 days
1967
53 days
1968
50 days
1969
31 days
1970
70 days
1971
47 days
1972
72 days
1973
22 days
1974
29 days
1975
6 days
1977
29 days
1978
32 days
1979
33 days
1980
36 days
1981
19 days
1982
40 days
1983
37 days
1984
34 days
1985
19 days
1986
35 days
1987
42 days
1988
56 days
1989
62 days
1990
23 days
1991
26 days
1992
33 days
1993
24 days
1994
30 days
1995
34 days
1996
37 days
1997
30 days
1998
40 days
1999
69 days
2000
26 days
2001
27 days
2002
62 days
2003
34 days
2004
31 days
2005
55 days
2006
56 days
2007
32 days
2008
31 days
2009
38 days
2010
43 days
2011
23 days
2012
55 days
2013
28 days
2014
34 days
2015
21 days
2016
43 days
2017
37 days
2018
24 days
2019
30 days
2020
44 days
2021
18 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
20 years with a frost
Across 20 years with a frost, the median last spring frost at Idalia falls on 6 May and the median first autumn frost on 8 October, which leaves a median of 156 days between them.
Frost dates and growing season at Idalia
Measure
Median, all years
Earliest period
Recent period (1988 to 2020)
Recent against earliest
Fitted trend
Last spring frost
6 May
n/a
6 May
n/a
n/a
First autumn frost
8 October
n/a
8 October
n/a
n/a
Growing days
156 days
n/a
156 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
64 years, 1942 to 2020
A day with at least 48.1 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 130.7 mm (5.1 in) of rain is expected about once in 100 years.
Rainfall return levels at Idalia: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
48.1 mm (1.9 in)
5 years
67.6 mm (2.7 in)
10 years
81.4 mm (3.2 in)
25 years
100.2 mm (3.9 in)
50 years
115.1 mm (4.5 in)
100 years
130.7 mm (5.1 in)
Longer than the 64 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, 64 years of values from 1942 to 2020.
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: 126.0 mm (5.0 in) in 1946; 121.9 mm (4.8 in) in 1983; 114.6 mm (4.5 in) in 1942.
Download the Data
Data for Idalia standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Idalia 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.