Black Flat-U.M. Ck Weather Records (USS0011L04S)

Record envelope, standing records and threshold days for Black Flat-U.M. Ck (USS0011L04S), Utah, United States, with 47 years of record.

Key Facts for Black Flat-U.M. Ck

Black Flat-U.M. Ck (USS0011L04S) is a weather station in Utah, United States at 38.68 latitude and -111.60 longitude, 2,884 m (9,462 ft) above sea level.
The station reports from 1980 to 2026, 47 years of record.
1,464 records set at Black Flat-U.M. Ck still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Black Flat-U.M. Ck set a daily record precipitation of 25.4 mm (1.0 in) on 31 August 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

Location: Utah, United States, 38.68 latitude, -111.60 longitude.
Elevation: 2,884 m (9,462 ft).
Period of record: 1980 to 2026, 47 years.
Eligible elements: prcp.

Daily Record Envelope and 2026

29 days at or beyond a record

The band shows the record high and record low for each calendar day at Black Flat-U.M. Ck. The lines show the 2026 daily maximum and minimum. 29 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Black Flat-U.M. Ck, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	13.0 C (55.4 F)	-30.3 C (-22.5 F)	8.8 C (47.8 F)	-20.3 C (-4.5 F)
Feb	15.3 C (59.5 F)	-27.5 C (-17.5 F)	10.7 C (51.3 F)	-22.8 C (-9.0 F)
Mar	21.6 C (70.9 F)	-24.0 C (-11.2 F)	21.6 C (70.9 F)	-15.7 C (3.7 F)
Apr	20.2 C (68.4 F)	-21.7 C (-7.1 F)	15.2 C (59.4 F)	-14.4 C (6.1 F)
May	24.0 C (75.2 F)	-13.7 C (7.3 F)	23.1 C (73.6 F)	-8.1 C (17.4 F)
Jun	29.8 C (85.6 F)	-6.1 C (21.0 F)	25.4 C (77.7 F)	-1.9 C (28.6 F)
Jul	29.8 C (85.6 F)	-1.7 C (28.9 F)	28.4 C (83.1 F)	0.2 C (32.4 F)
Aug	29.9 C (85.8 F)	-1.9 C (28.6 F)	28.7 C (83.7 F)	2.0 C (35.6 F)
Sep	29.0 C (84.2 F)	-9.0 C (15.8 F)	22.2 C (72.0 F)	-1.5 C (29.3 F)
Oct	24.4 C (75.9 F)	-19.7 C (-3.5 F)	20.3 C (68.5 F)	-2.2 C (28.0 F)
Nov	17.5 C (63.5 F)	-28.1 C (-18.6 F)	n/a	n/a
Dec	14.9 C (58.8 F)	-28.5 C (-19.3 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Black Flat-U.M. Ck still stand. 2020 holds the most, with 88.

Standing records at Black Flat-U.M. Ck by the year they were set
Year set	Standing records
2006	42
2007	81
2008	75
2009	70
2010	73
2011	74
2012	69
2013	81
2014	60
2015	62
2016	66
2017	83
2018	60
2019	81
2020	88
2021	71
2022	73
2023	55
2024	56
2025	71
2026	73

Wettest Day of Each Month

Sep: 50.8 mm (2.0 in)

The wettest day on record for each calendar month at Black Flat-U.M. Ck. The most was 50.8 mm (2.0 in) on 10 September 1980.

Record daily precipitation for each month at Black Flat-U.M. Ck
Month	Record daily precipitation (mm)	Date
Jan	22.9 mm (0.9 in)	10 January 2018
Feb	25.4 mm (1.0 in)	4 February 1989
Mar	45.7 mm (1.8 in)	30 March 1981
Apr	27.9 mm (1.1 in)	25 April 1986
May	40.6 mm (1.6 in)	31 May 1991
Jun	33.0 mm (1.3 in)	2 June 2005
Jul	45.7 mm (1.8 in)	19 July 2026
Aug	45.7 mm (1.8 in)	1 August 2021
Sep	50.8 mm (2.0 in)	10 September 1980
Oct	30.5 mm (1.2 in)	17 October 1984
Nov	43.2 mm (1.7 in)	26 November 2024
Dec	48.3 mm (1.9 in)	22 December 2015

Period of Record Coverage

2006 to 2026

21 years of record at Black Flat-U.M. Ck, 2006 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 2006, 2026.

Days with data per year at Black Flat-U.M. Ck
Year	Days with data	Share of year	Complete
2006	210	58%	No
2007	365	100%	Yes
2008	362	99%	Yes
2009	365	100%	Yes
2010	365	100%	Yes
2011	365	100%	Yes
2012	366	100%	Yes
2013	365	100%	Yes
2014	365	100%	Yes
2015	365	100%	Yes
2016	366	100%	Yes
2017	365	100%	Yes
2018	365	100%	Yes
2019	365	100%	Yes
2020	366	100%	Yes
2021	365	100%	Yes
2022	365	100%	Yes
2023	365	100%	Yes
2024	366	100%	Yes
2025	365	100%	Yes
2026	286	78%	No

Latest Records

Latest records at Black Flat-U.M. Ck
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 August 2026	Black Flat-U.M. Ck, US	daily rain (Provisional)	25.4 mm (1.0 in)	7.6 mm (0.30 in)	28 years	25 of 100 (Routine)
30 August 2026	Black Flat-U.M. Ck, US	daily rain (Provisional)	17.8 mm (0.7 in)	2.6 mm (0.10 in)	27 years	16 of 100 (Routine)
29 July 2026	Black Flat-U.M. Ck, US	daily rain	20.3 mm (0.8 in)	2.5 mm (0.10 in)	16 years	12 of 100 (Routine)
19 July 2026	Black Flat-U.M. Ck, US	monthly rain	45.7 mm (1.8 in)	15.2 mm (0.6 in)	33 years	51 of 100 (Notable)
25 June 2026	Black Flat-U.M. Ck, US	daily rain	12.7 mm (0.5 in)	2.5 mm (0.10 in)	40 years	20 of 100 (Routine)
14 April 2026	Black Flat-U.M. Ck, US	daily rain (Tie)	10.2 mm (0.4 in)	tie	13 years	2 of 100 (Routine)
6 December 2025	Black Flat-U.M. Ck, US	daily rain (Tie)	12.7 mm (0.5 in)	tie	28 years	3 of 100 (Routine)
16 November 2025	Black Flat-U.M. Ck, US	daily rain (Tie)	10.2 mm (0.4 in)	tie	12 years	1 of 100 (Routine)
10 October 2025	Black Flat-U.M. Ck, US	daily rain	15.2 mm (0.6 in)	2.5 mm (0.10 in)	44 years	20 of 100 (Routine)
9 October 2025	Black Flat-U.M. Ck, US	daily rain	12.7 mm (0.5 in)	5.1 mm (0.20 in)	24 years	19 of 100 (Routine)
28 September 2025	Black Flat-U.M. Ck, US	daily rain	12.7 mm (0.5 in)	2.5 mm (0.10 in)	20 years	13 of 100 (Routine)
29 August 2025	Black Flat-U.M. Ck, US	daily rain	15.2 mm (0.6 in)	5.0 mm (0.20 in)	24 years	19 of 100 (Routine)
2 July 2025	Black Flat-U.M. Ck, US	daily rain	5.1 mm (0.20 in)	5.1 mm (0.20 in)	44 years	20 of 100 (Routine)
1 April 2025	Black Flat-U.M. Ck, US	daily rain (Tie)	15.2 mm (0.6 in)	tie	20 years	2 of 100 (Routine)
18 March 2025	Black Flat-U.M. Ck, US	daily rain	12.7 mm (0.5 in)	2.5 mm (0.10 in)	32 years	18 of 100 (Routine)
6 March 2025	Black Flat-U.M. Ck, US	daily rain	22.9 mm (0.9 in)	12.7 mm (0.5 in)	30 years	20 of 100 (Routine)
26 November 2024	Black Flat-U.M. Ck, US	monthly rain	43.2 mm (1.7 in)	2.6 mm (0.10 in)	35 years	28 of 100 (Routine)
3 November 2024	Black Flat-U.M. Ck, US	daily rain (Tie)	7.6 mm (0.30 in)	tie	24 years	2 of 100 (Routine)
18 October 2024	Black Flat-U.M. Ck, US	daily rain	12.7 mm (0.5 in)	5.1 mm (0.20 in)	19 years	17 of 100 (Routine)
12 August 2024	Black Flat-U.M. Ck, US	daily rain	20.3 mm (0.8 in)	17.8 mm (0.7 in)	40 years	20 of 100 (Routine)

Climate Trend

19 complete years, 2007 to 2025

One stripe for each of 19 complete years at Black Flat-U.M. Ck, 2007 to 2025. Blue stripes are years cooler than the station's own mean of 3.3 C (38.0 F); red stripes are warmer. The coolest year was 2011, at 2.3 C (36.2 F), and the warmest was 2025, at 4.3 C (39.8 F). The strongest colour marks a difference of 1.1 C (2.0 F).

Annual mean temperature at Black Flat-U.M. Ck as warming stripes, 2007 to 2025
Year	Annual mean temperature	Difference from the station mean
2007	3.4 C	+0.11 C
2008	2.5 C	-0.88 C
2009	2.9 C	-0.47 C
2010	2.7 C	-0.66 C
2011	2.3 C	-1.01 C
2012	3.8 C	+0.48 C
2013	2.7 C	-0.61 C
2014	3.6 C	+0.28 C
2015	3.7 C	+0.38 C
2016	3.7 C	+0.32 C
2017	4.2 C	+0.89 C
2018	3.7 C	+0.38 C
2019	2.4 C	-0.89 C
2020	3.8 C	+0.51 C
2021	3.8 C	+0.42 C
2022	3.3 C	-0.06 C
2023	2.6 C	-0.70 C
2024	3.9 C	+0.57 C
2025	4.3 C	+0.98 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

1980 to 2026

Yearly extremes at Black Flat-U.M. Ck: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	29.9 C (85.8 F)	2020	28.1 C (82.6 F)	21
Coldest night (TNn)	-30.3 C (-22.5 F)	2013	-24.3 C (-11.7 F)	21
Wettest day (Rx1day)	50.8 mm (2.0 in)	1980	27.9 mm (1.1 in)	47
Wettest five days (Rx5day)	83.9 mm (3.3 in)	2015	50.8 mm (2.0 in)	47
Longest dry spell (CDD)	50 days	2018	27 days	47

Hottest day (TXx)

The hottest day of the year at Black Flat-U.M. Ck, 1980 to 2026. The record is 29.9 C (85.8 F) in 2020, marked on the chart; the median year is 28.1 C (82.6 F).

Hottest day (TXx) at Black Flat-U.M. Ck by year
Year	Hottest day (TXx)
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	27.8 C (82.0 F)
2007	28.0 C (82.4 F)
2008	27.4 C (81.3 F)
2009	26.9 C (80.4 F)
2010	27.6 C (81.7 F)
2011	26.8 C (80.2 F)
2012	27.1 C (80.8 F)
2013	28.4 C (83.1 F)
2014	26.1 C (79.0 F)
2015	27.9 C (82.2 F)
2016	29.4 C (84.9 F)
2017	28.1 C (82.6 F)
2018	28.5 C (83.3 F)
2019	28.6 C (83.5 F)
2020	29.9 C (85.8 F)
2021	29.8 C (85.6 F)
2022	29.0 C (84.2 F)
2023	29.6 C (85.3 F)
2024	28.7 C (83.7 F)
2025	27.9 C (82.2 F)
2026	28.7 C (83.7 F)

Coldest night (TNn)

The coldest night of the year at Black Flat-U.M. Ck, 1980 to 2026. The record is -30.3 C (-22.5 F) in 2013, marked on the chart; the median year is -24.3 C (-11.7 F).

Coldest night (TNn) at Black Flat-U.M. Ck by year
Year	Coldest night (TNn)
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	-22.2 C (-8.0 F)
2007	-26.2 C (-15.2 F)
2008	-26.4 C (-15.5 F)
2009	-27.0 C (-16.6 F)
2010	-28.1 C (-18.6 F)
2011	-28.6 C (-19.5 F)
2012	-21.4 C (-6.5 F)
2013	-30.3 C (-22.5 F)
2014	-24.3 C (-11.7 F)
2015	-26.0 C (-14.8 F)
2016	-26.7 C (-16.1 F)
2017	-24.9 C (-12.8 F)
2018	-26.5 C (-15.7 F)
2019	-23.9 C (-11.0 F)
2020	-22.1 C (-7.8 F)
2021	-23.3 C (-9.9 F)
2022	-23.7 C (-10.7 F)
2023	-24.0 C (-11.2 F)
2024	-21.2 C (-6.2 F)
2025	-22.8 C (-9.0 F)
2026	-22.8 C (-9.0 F)

Wettest day (Rx1day)

The wettest day of the year at Black Flat-U.M. Ck, 1980 to 2026. The record is 50.8 mm (2.0 in) in 1980, marked on the chart; the median year is 27.9 mm (1.1 in).

Wettest day (Rx1day) at Black Flat-U.M. Ck by year
Year	Wettest day (Rx1day)
1980	50.8 mm (2.0 in)
1981	45.7 mm (1.8 in)
1982	27.9 mm (1.1 in)
1983	33.0 mm (1.3 in)
1984	30.5 mm (1.2 in)
1985	27.9 mm (1.1 in)
1986	27.9 mm (1.1 in)
1987	35.6 mm (1.4 in)
1988	27.9 mm (1.1 in)
1989	40.6 mm (1.6 in)
1990	27.9 mm (1.1 in)
1991	40.6 mm (1.6 in)
1992	38.1 mm (1.5 in)
1993	20.3 mm (0.8 in)
1994	25.4 mm (1.0 in)
1995	30.5 mm (1.2 in)
1996	25.4 mm (1.0 in)
1997	22.9 mm (0.9 in)
1998	43.2 mm (1.7 in)
1999	17.8 mm (0.7 in)
2000	30.5 mm (1.2 in)
2001	27.9 mm (1.1 in)
2002	20.3 mm (0.8 in)
2003	20.3 mm (0.8 in)
2004	27.9 mm (1.1 in)
2005	33.0 mm (1.3 in)
2006	30.5 mm (1.2 in)
2007	33.0 mm (1.3 in)
2008	22.9 mm (0.9 in)
2009	22.9 mm (0.9 in)
2010	30.5 mm (1.2 in)
2011	20.3 mm (0.8 in)
2012	27.9 mm (1.1 in)
2013	20.3 mm (0.8 in)
2014	30.5 mm (1.2 in)
2015	48.3 mm (1.9 in)
2016	50.8 mm (2.0 in)
2017	22.9 mm (0.9 in)
2018	30.5 mm (1.2 in)
2019	25.4 mm (1.0 in)
2020	15.2 mm (0.6 in)
2021	45.7 mm (1.8 in)
2022	20.3 mm (0.8 in)
2023	22.9 mm (0.9 in)
2024	43.2 mm (1.7 in)
2025	22.9 mm (0.9 in)
2026	45.7 mm (1.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Black Flat-U.M. Ck, 1980 to 2026. The record is 83.9 mm (3.3 in) in 2015, marked on the chart; the median year is 50.8 mm (2.0 in).

Wettest five days (Rx5day) at Black Flat-U.M. Ck by year
Year	Wettest five days (Rx5day)
1980	2.5 mm (0.10 in)
1981	53.3 mm (2.1 in)
1982	76.1 mm (3.0 in)
1983	55.9 mm (2.2 in)
1984	50.8 mm (2.0 in)
1985	55.9 mm (2.2 in)
1986	38.1 mm (1.5 in)
1987	48.3 mm (1.9 in)
1988	43.2 mm (1.7 in)
1989	40.6 mm (1.6 in)
1990	35.5 mm (1.4 in)
1991	58.3 mm (2.3 in)
1992	61.0 mm (2.4 in)
1993	45.8 mm (1.8 in)
1994	45.6 mm (1.8 in)
1995	45.7 mm (1.8 in)
1996	43.1 mm (1.7 in)
1997	58.5 mm (2.3 in)
1998	48.2 mm (1.9 in)
1999	43.2 mm (1.7 in)
2000	58.5 mm (2.3 in)
2001	61.1 mm (2.4 in)
2002	43.2 mm (1.7 in)
2003	30.5 mm (1.2 in)
2004	68.5 mm (2.7 in)
2005	60.9 mm (2.4 in)
2006	48.3 mm (1.9 in)
2007	45.7 mm (1.8 in)
2008	43.2 mm (1.7 in)
2009	35.6 mm (1.4 in)
2010	68.6 mm (2.7 in)
2011	43.1 mm (1.7 in)
2012	63.5 mm (2.5 in)
2013	48.3 mm (1.9 in)
2014	61.0 mm (2.4 in)
2015	83.9 mm (3.3 in)
2016	61.0 mm (2.4 in)
2017	43.1 mm (1.7 in)
2018	55.9 mm (2.2 in)
2019	50.8 mm (2.0 in)
2020	30.5 mm (1.2 in)
2021	71.0 mm (2.8 in)
2022	50.8 mm (2.0 in)
2023	61.0 mm (2.4 in)
2024	66.0 mm (2.6 in)
2025	55.8 mm (2.2 in)
2026	63.5 mm (2.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Black Flat-U.M. Ck, 1980 to 2026. The record is 50 days in 2018, marked on the chart; the median year is 27 days.

Longest dry spell (CDD) at Black Flat-U.M. Ck by year
Year	Longest dry spell (CDD)
1980	6 days
1981	31 days
1982	15 days
1983	15 days
1984	21 days
1985	22 days
1986	24 days
1987	22 days
1988	19 days
1989	28 days
1990	18 days
1991	40 days
1992	32 days
1993	18 days
1994	47 days
1995	21 days
1996	23 days
1997	32 days
1998	16 days
1999	29 days
2000	31 days
2001	18 days
2002	33 days
2003	27 days
2004	22 days
2005	21 days
2006	45 days
2007	32 days
2008	21 days
2009	24 days
2010	39 days
2011	15 days
2012	41 days
2013	46 days
2014	33 days
2015	22 days
2016	31 days
2017	33 days
2018	50 days
2019	35 days
2020	32 days
2021	37 days
2022	28 days
2023	31 days
2024	22 days
2025	26 days
2026	25 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.

Rainfall Return Levels

44 years, 1982 to 2025

A day with at least 27.8 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 57.1 mm (2.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Black Flat-U.M. Ck: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	27.8 mm (1.1 in)
5 years	35.4 mm (1.4 in)
10 years	40.5 mm (1.6 in)
25 years	47.1 mm (1.9 in)
50 years	52.1 mm (2.1 in)	Longer than the 44 years of record
100 years	57.1 mm (2.2 in)	Longer than the 44 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, 44 years of values from 1982 to 2025.

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: 50.8 mm (2.0 in) in 2016; 48.3 mm (1.9 in) in 2015; 45.7 mm (1.8 in) in 2021.

Download the Data

Data for Black Flat-U.M. Ck standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Black Flat-U.M. Ck 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).