Record envelope, standing records and threshold days for Hourglass Rsvr (USC00054135), Colorado, United States, with 34 years of record.
Key Facts for Hourglass Rsvr
Hourglass Rsvr (USC00054135) is a weather station in Colorado, United States at 40.58 latitude and -105.63 longitude, 2,902 m (9,520 ft) above sea level.
The station reports from 1988 to 2021, 34 years of record.
1,464 records set at Hourglass Rsvr still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Hourglass Rsvr set a daily record high minimum temperature of 8.9 C (48.0 F) on 11 September 2021.
About the Station
Location: Colorado, United States, 40.58 latitude, -105.63 longitude.
Elevation: 2,902 m (9,520 ft).
Period of record: 1988 to 2021, 34 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 Hourglass Rsvr. 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 Hourglass Rsvr, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
14.4 C (57.9 F)
-31.7 C (-25.1 F)
n/a
n/a
Feb
13.9 C (57.0 F)
-36.1 C (-33.0 F)
n/a
n/a
Mar
18.9 C (66.0 F)
-28.3 C (-18.9 F)
n/a
n/a
Apr
20.6 C (69.1 F)
-24.4 C (-11.9 F)
n/a
n/a
May
26.1 C (79.0 F)
-18.3 C (-0.9 F)
n/a
n/a
Jun
31.1 C (88.0 F)
-5.6 C (21.9 F)
n/a
n/a
Jul
32.8 C (91.0 F)
-6.7 C (19.9 F)
n/a
n/a
Aug
30.6 C (87.1 F)
-3.3 C (26.1 F)
n/a
n/a
Sep
29.4 C (84.9 F)
-10.6 C (12.9 F)
n/a
n/a
Oct
23.9 C (75.0 F)
-25.0 C (-13.0 F)
n/a
n/a
Nov
20.0 C (68.0 F)
-30.6 C (-23.1 F)
n/a
n/a
Dec
15.6 C (60.1 F)
-33.3 C (-27.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Hourglass Rsvr still stand. 1990 holds the most, with 78.
Standing records at Hourglass Rsvr by the year they were set
Year set
Standing records
1988
12
1989
71
1990
78
1991
41
1992
56
1993
62
1994
49
1995
71
1996
62
1997
42
1998
48
1999
62
2000
64
2001
24
2002
18
2003
45
2004
40
2005
41
2006
34
2007
38
2008
32
2009
40
2010
25
2011
34
2012
35
2013
46
2014
34
2015
39
2016
35
2017
40
2018
28
2019
39
2020
49
2021
30
Wettest Day of Each Month
Mar: 70.9 mm (2.8 in)
The wettest day on record for each calendar month at Hourglass Rsvr. The most was 70.9 mm (2.8 in) on 19 March 2003.
Record daily precipitation for each month at Hourglass Rsvr
Month
Record daily precipitation (mm)
Date
Jan
27.9 mm (1.1 in)
5 January 2017
Feb
24.4 mm (1.0 in)
4 February 1989
Mar
70.9 mm (2.8 in)
19 March 2003
Apr
50.8 mm (2.0 in)
28 April 2021
May
44.5 mm (1.8 in)
1 May 2013
Jun
27.9 mm (1.1 in)
12 June 2010
Jul
45.7 mm (1.8 in)
30 July 2014
Aug
27.4 mm (1.1 in)
19 August 2004
Sep
69.3 mm (2.7 in)
12 September 2013
Oct
32.3 mm (1.3 in)
25 October 1997
Nov
23.4 mm (0.9 in)
2 November 2011
Dec
17.3 mm (0.7 in)
29 December 2006
Period of Record Coverage
1988 to 2021
Complete yearUnder 90 percent of days
34 years of record at Hourglass Rsvr, 1988 to 2021. 2 years have data for under 90 percent of days and are left out of rankings: 1988, 2021.
Cooler than the station meanWarmer than the station mean
One stripe for each of 30 complete years at Hourglass Rsvr, 1989 to 2020. Blue stripes are years cooler than the station's own mean of 3.2 C (37.8 F); red stripes are warmer. The coolest year was 1993, at 1.8 C (35.3 F), and the warmest was 2012, at 4.3 C (39.7 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Hourglass Rsvr as warming stripes, 1989 to 2020
Year
Annual mean temperature
Difference from the station mean
1989
3.0 C
-0.21 C
1990
3.0 C
-0.27 C
1991
3.4 C
+0.10 C
1992
3.2 C
-0.09 C
1993
1.8 C
-1.42 C
1994
3.9 C
+0.62 C
1995
3.5 C
+0.21 C
1996
3.9 C
+0.67 C
1997
3.4 C
+0.11 C
1998
3.9 C
+0.65 C
1999
4.2 C
+0.90 C
2000
3.9 C
+0.69 C
2001
3.7 C
+0.42 C
2003
3.4 C
+0.13 C
2004
2.6 C
-0.62 C
2005
3.2 C
-0.03 C
2006
3.0 C
-0.27 C
2007
3.5 C
+0.24 C
2008
2.1 C
-1.13 C
2009
2.3 C
-0.92 C
2010
2.9 C
-0.36 C
2011
2.5 C
-0.75 C
2012
4.3 C
+1.01 C
2013
2.7 C
-0.52 C
2014
3.2 C
-0.10 C
2016
3.8 C
+0.59 C
2017
3.9 C
+0.63 C
2018
3.5 C
+0.20 C
2019
2.6 C
-0.69 C
2020
3.3 C
+0.06 C
The fitted trend in annual mean temperature here over 1989 to 2020 is -0.04 C (-0.29 to 0.21) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.5 to 0.4) 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 Hourglass Rsvr
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.04 C (-0.29 to 0.21) per decade
-0.1 F (-0.5 to 0.4) per decade
1989 to 2020
30
Not clearly different from zero
Mean daily maximum
-0.2 C (-0.5 to 0.1) per decade
-0.4 F (-0.9 to 0.2) per decade
1989 to 2020
30
Not clearly different from zero
Mean daily minimum
0.1 C (-0.2 to 0.5) per decade
0.3 F (-0.3 to 0.8) per decade
1989 to 2020
30
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
1988 to 2021
Yearly extremes at Hourglass Rsvr: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
32.8 C (91.0 F)
1989
29.4 C (84.9 F)
34
Coldest night (TNn)
-36.1 C (-33.0 F)
2011
-27.8 C (-18.0 F)
34
Wettest day (Rx1day)
70.9 mm (2.8 in)
2003
26.9 mm (1.1 in)
34
Wettest five days (Rx5day)
148.0 mm (5.8 in)
2013
48.5 mm (1.9 in)
34
Longest dry spell (CDD)
37 days
1995
20 days
34
Hottest day (TXx)
The hottest day of the year at Hourglass Rsvr, 1988 to 2021. The record is 32.8 C (91.0 F) in 1989, marked on the chart; the median year is 29.4 C (84.9 F).
Hottest day (TXx) at Hourglass Rsvr by year
Year
Hottest day (TXx)
1988
27.2 C (81.0 F)
1989
32.8 C (91.0 F)
1990
30.6 C (87.1 F)
1991
28.3 C (82.9 F)
1992
27.2 C (81.0 F)
1993
30.6 C (87.1 F)
1994
30.0 C (86.0 F)
1995
30.6 C (87.1 F)
1996
30.6 C (87.1 F)
1997
30.0 C (86.0 F)
1998
32.2 C (90.0 F)
1999
28.9 C (84.0 F)
2000
28.3 C (82.9 F)
2001
30.0 C (86.0 F)
2002
29.4 C (84.9 F)
2003
29.4 C (84.9 F)
2004
27.2 C (81.0 F)
2005
29.4 C (84.9 F)
2006
29.4 C (84.9 F)
2007
27.8 C (82.0 F)
2008
28.3 C (82.9 F)
2009
27.8 C (82.0 F)
2010
28.9 C (84.0 F)
2011
28.3 C (82.9 F)
2012
31.1 C (88.0 F)
2013
30.6 C (87.1 F)
2014
27.8 C (82.0 F)
2015
28.3 C (82.9 F)
2016
28.3 C (82.9 F)
2017
28.9 C (84.0 F)
2018
30.6 C (87.1 F)
2019
29.4 C (84.9 F)
2020
28.3 C (82.9 F)
2021
30.0 C (86.0 F)
Coldest night (TNn)
The coldest night of the year at Hourglass Rsvr, 1988 to 2021. The record is -36.1 C (-33.0 F) in 2011, marked on the chart; the median year is -27.8 C (-18.0 F).
Coldest night (TNn) at Hourglass Rsvr by year
Year
Coldest night (TNn)
1988
-23.9 C (-11.0 F)
1989
-35.6 C (-32.1 F)
1990
-31.1 C (-24.0 F)
1991
-28.3 C (-18.9 F)
1992
-23.3 C (-9.9 F)
1993
-25.6 C (-14.1 F)
1994
-30.0 C (-22.0 F)
1995
-21.7 C (-7.1 F)
1996
-27.8 C (-18.0 F)
1997
-31.1 C (-24.0 F)
1998
-26.1 C (-15.0 F)
1999
-19.4 C (-2.9 F)
2000
-20.6 C (-5.1 F)
2001
-23.9 C (-11.0 F)
2002
-28.3 C (-18.9 F)
2003
-23.3 C (-9.9 F)
2004
-28.9 C (-20.0 F)
2005
-33.3 C (-27.9 F)
2006
-23.9 C (-11.0 F)
2007
-26.1 C (-15.0 F)
2008
-22.2 C (-8.0 F)
2009
-26.7 C (-16.1 F)
2010
-27.8 C (-18.0 F)
2011
-36.1 C (-33.0 F)
2012
-25.0 C (-13.0 F)
2013
-31.7 C (-25.1 F)
2014
-33.3 C (-27.9 F)
2015
-26.7 C (-16.1 F)
2016
-28.9 C (-20.0 F)
2017
-28.9 C (-20.0 F)
2018
-26.1 C (-15.0 F)
2019
-28.9 C (-20.0 F)
2020
-29.4 C (-20.9 F)
2021
-30.0 C (-22.0 F)
Wettest day (Rx1day)
The wettest day of the year at Hourglass Rsvr, 1988 to 2021. The record is 70.9 mm (2.8 in) in 2003, marked on the chart; the median year is 26.9 mm (1.1 in).
Wettest day (Rx1day) at Hourglass Rsvr by year
Year
Wettest day (Rx1day)
1988
14.0 mm (0.6 in)
1989
24.4 mm (1.0 in)
1990
24.9 mm (1.0 in)
1991
22.9 mm (0.9 in)
1992
23.6 mm (0.9 in)
1993
23.9 mm (0.9 in)
1994
17.0 mm (0.7 in)
1995
21.6 mm (0.9 in)
1996
20.3 mm (0.8 in)
1997
32.5 mm (1.3 in)
1998
21.1 mm (0.8 in)
1999
20.6 mm (0.8 in)
2000
30.0 mm (1.2 in)
2001
24.4 mm (1.0 in)
2002
23.1 mm (0.9 in)
2003
70.9 mm (2.8 in)
2004
29.2 mm (1.1 in)
2005
29.7 mm (1.2 in)
2006
23.4 mm (0.9 in)
2007
19.6 mm (0.8 in)
2008
26.4 mm (1.0 in)
2009
35.1 mm (1.4 in)
2010
28.4 mm (1.1 in)
2011
43.7 mm (1.7 in)
2012
19.6 mm (0.8 in)
2013
69.3 mm (2.7 in)
2014
45.7 mm (1.8 in)
2015
47.0 mm (1.9 in)
2016
29.5 mm (1.2 in)
2017
38.1 mm (1.5 in)
2018
27.4 mm (1.1 in)
2019
53.3 mm (2.1 in)
2020
30.5 mm (1.2 in)
2021
50.8 mm (2.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Hourglass Rsvr, 1988 to 2021. The record is 148.0 mm (5.8 in) in 2013, marked on the chart; the median year is 48.5 mm (1.9 in).
Wettest five days (Rx5day) at Hourglass Rsvr by year
Year
Wettest five days (Rx5day)
1988
15.0 mm (0.6 in)
1989
42.0 mm (1.7 in)
1990
57.4 mm (2.3 in)
1991
35.5 mm (1.4 in)
1992
42.0 mm (1.7 in)
1993
37.4 mm (1.5 in)
1994
20.5 mm (0.8 in)
1995
45.0 mm (1.8 in)
1996
35.1 mm (1.4 in)
1997
49.8 mm (2.0 in)
1998
37.1 mm (1.5 in)
1999
47.3 mm (1.9 in)
2000
60.8 mm (2.4 in)
2001
50.8 mm (2.0 in)
2002
42.0 mm (1.7 in)
2003
146.6 mm (5.8 in)
2004
62.3 mm (2.5 in)
2005
40.3 mm (1.6 in)
2006
30.6 mm (1.2 in)
2007
34.8 mm (1.4 in)
2008
47.5 mm (1.9 in)
2009
73.7 mm (2.9 in)
2010
49.5 mm (1.9 in)
2011
50.6 mm (2.0 in)
2012
28.9 mm (1.1 in)
2013
148.0 mm (5.8 in)
2014
69.1 mm (2.7 in)
2015
86.8 mm (3.4 in)
2016
57.4 mm (2.3 in)
2017
81.5 mm (3.2 in)
2018
41.2 mm (1.6 in)
2019
67.1 mm (2.6 in)
2020
52.6 mm (2.1 in)
2021
94.2 mm (3.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Hourglass Rsvr, 1988 to 2021. The record is 37 days in 1995, marked on the chart; the median year is 20 days.
Longest dry spell (CDD) at Hourglass Rsvr by year
Year
Longest dry spell (CDD)
1988
16 days
1989
24 days
1990
19 days
1991
22 days
1992
27 days
1993
30 days
1994
23 days
1995
37 days
1996
17 days
1997
36 days
1998
30 days
1999
20 days
2000
28 days
2001
27 days
2002
18 days
2003
21 days
2004
15 days
2005
17 days
2006
17 days
2007
20 days
2008
24 days
2009
13 days
2010
20 days
2011
19 days
2012
32 days
2013
25 days
2014
13 days
2015
13 days
2016
20 days
2017
19 days
2018
17 days
2019
25 days
2020
29 days
2021
13 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 Hourglass Rsvr falls on 18 June and the median first autumn frost on 4 September, which leaves a median of 78 days between them.
Fitted over all years, the growing season changes by -3.1 days per decade at this station.
Frost dates and growing season at Hourglass Rsvr
Measure
Median, all years
Earliest period
Recent period (1989 to 2020)
Recent against earliest
Fitted trend
Last spring frost
18 June
n/a
18 June
n/a
0.0 days per decade
First autumn frost
4 September
n/a
4 September
n/a
-3.1 days per decade
Growing days
78 days
n/a
78 days
n/a
-3.1 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
32 years, 1989 to 2020
A day with at least 26.9 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 93.6 mm (3.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Hourglass Rsvr: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
26.9 mm (1.1 in)
5 years
36.9 mm (1.5 in)
10 years
45.8 mm (1.8 in)
25 years
60.8 mm (2.4 in)
50 years
75.4 mm (3.0 in)
Longer than the 32 years of record
100 years
93.6 mm (3.7 in)
Longer than the 32 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, 32 years of values from 1989 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: 70.9 mm (2.8 in) in 2003; 69.3 mm (2.7 in) in 2013; 53.3 mm (2.1 in) in 2019.
Download the Data
Data for Hourglass Rsvr standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Hourglass Rsvr 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.