Record envelope, standing records and threshold days for Ft Collins 4 E (USC00053006), Colorado, United States, with 34 years of record.
Key Facts for Ft Collins 4 E
Ft Collins 4 E (USC00053006) is a weather station in Colorado, United States at 40.58 latitude and -105.02 longitude, 1,500 m (4,920 ft) above sea level.
The station reports from 1990 to 2023, 34 years of record.
1,464 records set at Ft Collins 4 E still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Ft Collins 4 E set a daily record high minimum temperature of 3.3 C (37.9 F) on 20 November 2023.
About the Station
Location: Colorado, United States, 40.58 latitude, -105.02 longitude.
Elevation: 1,500 m (4,920 ft).
Period of record: 1990 to 2023, 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 Ft Collins 4 E. 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 Ft Collins 4 E, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
23.3 C (73.9 F)
-26.1 C (-15.0 F)
n/a
n/a
Feb
23.3 C (73.9 F)
-32.2 C (-26.0 F)
n/a
n/a
Mar
27.8 C (82.0 F)
-25.0 C (-13.0 F)
n/a
n/a
Apr
31.1 C (88.0 F)
-16.7 C (1.9 F)
n/a
n/a
May
35.6 C (96.1 F)
-9.4 C (15.1 F)
n/a
n/a
Jun
39.4 C (102.9 F)
1.1 C (34.0 F)
n/a
n/a
Jul
39.4 C (102.9 F)
6.7 C (44.1 F)
n/a
n/a
Aug
37.2 C (99.0 F)
3.9 C (39.0 F)
n/a
n/a
Sep
37.8 C (100.0 F)
-5.0 C (23.0 F)
n/a
n/a
Oct
31.7 C (89.1 F)
-20.6 C (-5.1 F)
n/a
n/a
Nov
26.7 C (80.1 F)
-25.0 C (-13.0 F)
n/a
n/a
Dec
21.1 C (70.0 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 Ft Collins 4 E still stand. 1995 holds the most, with 77.
Standing records at Ft Collins 4 E by the year they were set
Year set
Standing records
1990
26
1991
41
1992
44
1993
58
1994
38
1995
77
1996
61
1997
37
1998
47
1999
36
2000
55
2001
42
2002
45
2003
65
2004
51
2005
51
2006
65
2007
41
2008
32
2009
53
2010
36
2011
41
2012
49
2013
50
2014
53
2015
45
2016
38
2017
44
2018
34
2019
46
2020
52
2021
10
2023
1
Wettest Day of Each Month
Aug: 70.1 mm (2.8 in)
The wettest day on record for each calendar month at Ft Collins 4 E. The most was 70.1 mm (2.8 in) on 2 August 2007.
Record daily precipitation for each month at Ft Collins 4 E
Month
Record daily precipitation (mm)
Date
Jan
19.6 mm (0.8 in)
7 January 1992
Feb
13.2 mm (0.5 in)
1 February 2016
Mar
57.9 mm (2.3 in)
18 March 2003
Apr
54.4 mm (2.1 in)
30 April 1999
May
51.8 mm (2.0 in)
8 May 2015
Jun
40.9 mm (1.6 in)
5 June 2008
Jul
54.6 mm (2.1 in)
20 July 2009
Aug
70.1 mm (2.8 in)
2 August 2007
Sep
31.8 mm (1.3 in)
12 September 2013
Oct
32.0 mm (1.3 in)
9 October 2014
Nov
24.6 mm (1.0 in)
25 November 2019
Dec
11.2 mm (0.4 in)
12 December 2015
Period of Record Coverage
1990 to 2023
Complete yearUnder 90 percent of days
33 years of record at Ft Collins 4 E, 1990 to 2023. 3 years have data for under 90 percent of days and are left out of rankings: 1990, 2021, 2023.
Cooler than the station meanWarmer than the station mean
One stripe for each of 29 complete years at Ft Collins 4 E, 1991 to 2020. Blue stripes are years cooler than the station's own mean of 9.6 C (49.3 F); red stripes are warmer. The coolest year was 1993, at 7.9 C (46.3 F), and the warmest was 2012, at 11.2 C (52.2 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Ft Collins 4 E as warming stripes, 1991 to 2020
Year
Annual mean temperature
Difference from the station mean
1991
9.2 C
-0.46 C
1992
9.0 C
-0.61 C
1993
7.9 C
-1.69 C
1994
9.7 C
+0.05 C
1995
9.0 C
-0.66 C
1996
9.0 C
-0.65 C
1997
8.7 C
-0.91 C
1998
9.7 C
+0.05 C
1999
10.1 C
+0.44 C
2000
10.1 C
+0.45 C
2001
10.0 C
+0.43 C
2002
9.5 C
-0.14 C
2003
10.1 C
+0.52 C
2004
9.7 C
+0.08 C
2005
10.2 C
+0.57 C
2006
10.2 C
+0.61 C
2007
9.6 C
+0.03 C
2008
9.2 C
-0.39 C
2009
9.0 C
-0.63 C
2010
9.8 C
+0.17 C
2011
9.5 C
-0.13 C
2012
11.2 C
+1.59 C
2013
9.3 C
-0.34 C
2014
9.4 C
-0.26 C
2015
10.4 C
+0.77 C
2016
10.4 C
+0.83 C
2018
10.1 C
+0.49 C
2019
8.9 C
-0.68 C
2020
10.0 C
+0.36 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
1990 to 2023
Yearly extremes at Ft Collins 4 E: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
39.4 C (102.9 F)
2005
36.7 C (98.1 F)
33
Coldest night (TNn)
-33.3 C (-27.9 F)
1990
-25.0 C (-13.0 F)
33
Wettest day (Rx1day)
70.1 mm (2.8 in)
2007
35.1 mm (1.4 in)
33
Wettest five days (Rx5day)
128.3 mm (5.1 in)
1999
58.4 mm (2.3 in)
32
Longest dry spell (CDD)
63 days
2016
33 days
33
Hottest day (TXx)
The hottest day of the year at Ft Collins 4 E, 1990 to 2023. The record is 39.4 C (102.9 F) in 2005, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Ft Collins 4 E by year
Year
Hottest day (TXx)
1990
28.9 C (84.0 F)
1991
35.6 C (96.1 F)
1992
35.0 C (95.0 F)
1993
36.1 C (97.0 F)
1994
36.1 C (97.0 F)
1995
36.7 C (98.1 F)
1996
36.7 C (98.1 F)
1997
35.6 C (96.1 F)
1998
38.9 C (102.0 F)
1999
35.6 C (96.1 F)
2000
36.7 C (98.1 F)
2001
37.8 C (100.0 F)
2002
38.3 C (100.9 F)
2003
38.9 C (102.0 F)
2004
37.2 C (99.0 F)
2005
39.4 C (102.9 F)
2006
38.3 C (100.9 F)
2007
37.2 C (99.0 F)
2008
37.2 C (99.0 F)
2009
34.4 C (93.9 F)
2010
36.7 C (98.1 F)
2011
36.7 C (98.1 F)
2012
39.4 C (102.9 F)
2013
36.7 C (98.1 F)
2014
36.7 C (98.1 F)
2015
35.6 C (96.1 F)
2016
37.8 C (100.0 F)
2017
36.7 C (98.1 F)
2018
38.9 C (102.0 F)
2019
37.8 C (100.0 F)
2020
37.2 C (99.0 F)
2021
21.7 C (71.1 F)
2023
20.0 C (68.0 F)
Coldest night (TNn)
The coldest night of the year at Ft Collins 4 E, 1990 to 2023. The record is -33.3 C (-27.9 F) in 1990, marked on the chart; the median year is -25.0 C (-13.0 F).
Coldest night (TNn) at Ft Collins 4 E by year
Year
Coldest night (TNn)
1990
-33.3 C (-27.9 F)
1991
-21.7 C (-7.1 F)
1992
-22.2 C (-8.0 F)
1993
-25.0 C (-13.0 F)
1994
-25.6 C (-14.1 F)
1995
-26.1 C (-15.0 F)
1996
-32.2 C (-26.0 F)
1997
-25.0 C (-13.0 F)
1998
-28.9 C (-20.0 F)
1999
-15.6 C (3.9 F)
2000
-20.6 C (-5.1 F)
2001
-24.4 C (-11.9 F)
2002
-23.3 C (-9.9 F)
2003
-20.0 C (-4.0 F)
2004
-25.0 C (-13.0 F)
2005
-25.0 C (-13.0 F)
2006
-25.0 C (-13.0 F)
2007
-23.9 C (-11.0 F)
2008
-25.6 C (-14.1 F)
2009
-28.9 C (-20.0 F)
2010
-25.0 C (-13.0 F)
2011
-25.6 C (-14.1 F)
2012
-19.4 C (-2.9 F)
2013
-25.0 C (-13.0 F)
2014
-29.4 C (-20.9 F)
2015
-20.6 C (-5.1 F)
2016
-25.0 C (-13.0 F)
2017
-18.9 C (-2.0 F)
2018
-22.8 C (-9.0 F)
2019
-25.0 C (-13.0 F)
2020
-20.6 C (-5.1 F)
2021
-24.4 C (-11.9 F)
2023
-6.7 C (19.9 F)
Wettest day (Rx1day)
The wettest day of the year at Ft Collins 4 E, 1990 to 2023. The record is 70.1 mm (2.8 in) in 2007, marked on the chart; the median year is 35.1 mm (1.4 in).
Wettest day (Rx1day) at Ft Collins 4 E by year
Year
Wettest day (Rx1day)
1990
10.4 mm (0.4 in)
1991
31.2 mm (1.2 in)
1992
44.2 mm (1.7 in)
1993
27.2 mm (1.1 in)
1994
40.1 mm (1.6 in)
1995
33.3 mm (1.3 in)
1996
35.1 mm (1.4 in)
1997
38.6 mm (1.5 in)
1998
26.4 mm (1.0 in)
1999
54.4 mm (2.1 in)
2000
28.4 mm (1.1 in)
2001
29.5 mm (1.2 in)
2002
37.1 mm (1.5 in)
2003
57.9 mm (2.3 in)
2004
33.5 mm (1.3 in)
2005
35.8 mm (1.4 in)
2006
21.6 mm (0.9 in)
2007
70.1 mm (2.8 in)
2008
51.3 mm (2.0 in)
2009
54.6 mm (2.1 in)
2010
40.9 mm (1.6 in)
2011
46.2 mm (1.8 in)
2012
39.6 mm (1.6 in)
2013
31.8 mm (1.3 in)
2014
36.1 mm (1.4 in)
2015
51.8 mm (2.0 in)
2016
27.9 mm (1.1 in)
2017
49.8 mm (2.0 in)
2018
28.7 mm (1.1 in)
2019
24.6 mm (1.0 in)
2020
18.3 mm (0.7 in)
2021
27.7 mm (1.1 in)
2023
0.0 mm (0.00 in)
Wettest five days (Rx5day)
The wettest five days of the year at Ft Collins 4 E, 1990 to 2023. The record is 128.3 mm (5.1 in) in 1999, marked on the chart; the median year is 58.4 mm (2.3 in).
Wettest five days (Rx5day) at Ft Collins 4 E by year
Year
Wettest five days (Rx5day)
1990
16.3 mm (0.6 in)
1991
43.1 mm (1.7 in)
1992
74.2 mm (2.9 in)
1993
40.2 mm (1.6 in)
1994
45.2 mm (1.8 in)
1995
70.6 mm (2.8 in)
1996
85.2 mm (3.4 in)
1997
57.4 mm (2.3 in)
1998
31.4 mm (1.2 in)
1999
128.3 mm (5.1 in)
2000
38.8 mm (1.5 in)
2001
72.2 mm (2.8 in)
2002
38.9 mm (1.5 in)
2003
92.0 mm (3.6 in)
2004
45.8 mm (1.8 in)
2005
78.5 mm (3.1 in)
2006
21.6 mm (0.9 in)
2007
72.2 mm (2.8 in)
2008
85.1 mm (3.4 in)
2009
75.4 mm (3.0 in)
2010
80.3 mm (3.2 in)
2011
52.1 mm (2.1 in)
2012
60.9 mm (2.4 in)
2013
108.4 mm (4.3 in)
2014
59.4 mm (2.3 in)
2015
80.5 mm (3.2 in)
2016
31.5 mm (1.2 in)
2017
62.6 mm (2.5 in)
2018
44.7 mm (1.8 in)
2019
47.3 mm (1.9 in)
2020
25.7 mm (1.0 in)
2021
56.2 mm (2.2 in)
2023
n/a
Longest dry spell (CDD)
The longest dry spell of the year at Ft Collins 4 E, 1990 to 2023. The record is 63 days in 2016, marked on the chart; the median year is 33 days.
Longest dry spell (CDD) at Ft Collins 4 E by year
Year
Longest dry spell (CDD)
1990
21 days
1991
56 days
1992
41 days
1993
25 days
1994
31 days
1995
40 days
1996
45 days
1997
21 days
1998
41 days
1999
38 days
2000
32 days
2001
23 days
2002
36 days
2003
45 days
2004
28 days
2005
28 days
2006
39 days
2007
30 days
2008
42 days
2009
27 days
2010
47 days
2011
33 days
2012
39 days
2013
36 days
2014
39 days
2015
29 days
2016
63 days
2017
30 days
2018
31 days
2019
26 days
2020
45 days
2021
16 days
2023
2 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
29 years with a frost
Across 29 years with a frost, the median last spring frost at Ft Collins 4 E falls on 3 May and the median first autumn frost on 6 October, which leaves a median of 150 days between them.
Fitted over all years, the growing season changes by +4.4 days per decade at this station.
Frost dates and growing season at Ft Collins 4 E
Measure
Median, all years
Earliest period
Recent period (1991 to 2020)
Recent against earliest
Fitted trend
Last spring frost
3 May
n/a
3 May
n/a
-0.7 days per decade
First autumn frost
6 October
n/a
6 October
n/a
+3.7 days per decade
Growing days
150 days
n/a
150 days
n/a
+4.4 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
30 years, 1991 to 2020
A day with at least 36.3 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 76.3 mm (3.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Ft Collins 4 E: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
36.3 mm (1.4 in)
5 years
47.4 mm (1.9 in)
10 years
54.6 mm (2.1 in)
25 years
63.5 mm (2.5 in)
50 years
70.0 mm (2.8 in)
Longer than the 30 years of record
100 years
76.3 mm (3.0 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 1991 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: 70.1 mm (2.8 in) in 2007; 57.9 mm (2.3 in) in 2003; 54.6 mm (2.1 in) in 2009.
Download the Data
Data for Ft Collins 4 E standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ft Collins 4 E 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.