Powder River #2 Weather Records (USC00487376)

Record envelope, standing records and threshold days for Powder River #2 (USC00487376), Wyoming, United States, with 46 years of record.

Key Facts for Powder River #2

Powder River #2 (USC00487376) is a weather station in Wyoming, United States at 43.03 latitude and -106.99 longitude, 1,737 m (5,700 ft) above sea level.
The station reports from 1964 to 2009, 46 years of record.
1,464 records set at Powder River #2 still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Powder River #2 set a daily record snowfall of 2.5 cm (1.0 in) on 24 April 2009.

About the Station

Location: Wyoming, United States, 43.03 latitude, -106.99 longitude.
Elevation: 1,737 m (5,700 ft).
Period of record: 1964 to 2009, 46 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Powder River #2. 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 Powder River #2, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	15.6 C (60.1 F)	-41.1 C (-42.0 F)	n/a	n/a
Feb	18.3 C (64.9 F)	-35.0 C (-31.0 F)	n/a	n/a
Mar	23.3 C (73.9 F)	-27.8 C (-18.0 F)	n/a	n/a
Apr	27.8 C (82.0 F)	-22.2 C (-8.0 F)	n/a	n/a
May	35.6 C (96.1 F)	-11.1 C (12.0 F)	n/a	n/a
Jun	38.3 C (100.9 F)	-4.4 C (24.1 F)	n/a	n/a
Jul	42.8 C (109.0 F)	-1.1 C (30.0 F)	n/a	n/a
Aug	40.0 C (104.0 F)	-7.8 C (18.0 F)	n/a	n/a
Sep	37.2 C (99.0 F)	-12.2 C (10.0 F)	n/a	n/a
Oct	30.6 C (87.1 F)	-18.9 C (-2.0 F)	n/a	n/a
Nov	25.0 C (77.0 F)	-33.9 C (-29.0 F)	n/a	n/a
Dec	17.2 C (63.0 F)	-42.8 C (-45.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Powder River #2 still stand. 1969 holds the most, with 60.

Standing records at Powder River #2 by the year they were set
Year set	Standing records
1964	8
1965	42
1966	51
1967	35
1968	30
1969	60
1970	24
1971	20
1972	42
1973	43
1974	37
1975	39
1976	32
1977	27
1978	31
1979	37
1980	38
1981	57
1982	30
1983	32
1984	16
1985	49
1986	20
1987	14
1988	11
1989	40
1990	38
1991	28
1992	36
1993	39
1994	21
1995	31
1996	43
1997	8
1998	43
1999	37
2000	44
2001	4
2002	34
2003	40
2004	20
2005	27
2006	32
2007	27
2008	27
2009	20

All-Time Record Progression

4 new records

4 all-time records were set at Powder River #2 between 27 January 2000 and 29 March 2007. Each dot is a new record.

When Powder River #2 set new all-time records
Date	Kind	Detail
2000-01-27	Record daily snowfall	Record daily snowfall 35.6 cm (14.0 in)
2002-07-18	Record daily precipitation	Record daily precipitation 88.9 mm (3.5 in)
2003-03-18	Record daily snowfall	Record daily snowfall 53.3 cm (21.0 in)
2007-03-29	Record daily snowfall	Record daily snowfall 66.0 cm (26.0 in)

Wettest Day of Each Month

Jul: 88.9 mm (3.5 in)

The wettest day on record for each calendar month at Powder River #2. The most was 88.9 mm (3.5 in) on 18 July 2002.

Record daily precipitation for each month at Powder River #2
Month	Record daily precipitation (mm)	Date
Jan	21.6 mm (0.9 in)	6 January 1987
Feb	25.4 mm (1.0 in)	6 February 2001
Mar	36.8 mm (1.4 in)	29 March 2007
Apr	31.8 mm (1.3 in)	1 April 2007
May	49.0 mm (1.9 in)	5 May 2007
Jun	55.4 mm (2.2 in)	15 June 1967
Jul	88.9 mm (3.5 in)	18 July 2002
Aug	30.5 mm (1.2 in)	3 August 2005
Sep	38.1 mm (1.5 in)	28 September 1985
Oct	32.5 mm (1.3 in)	22 October 1995
Nov	27.9 mm (1.1 in)	16 November 1996
Dec	24.1 mm (0.9 in)	18 December 1974

Period of Record Coverage

1964 to 2009

46 years of record at Powder River #2, 1964 to 2009. 20 years have data for under 90 percent of days and are left out of rankings: 1964, 1965, 1969, 1971, 1977, 1979, 1982, 1983 and others.

Days with data per year at Powder River #2
Year	Days with data	Share of year	Complete
1964	108	30%	No
1965	316	87%	No
1966	357	98%	Yes
1967	353	97%	Yes
1968	335	92%	Yes
1969	316	87%	No
1970	330	90%	Yes
1971	274	75%	No
1972	360	98%	Yes
1973	363	99%	Yes
1974	362	99%	Yes
1975	361	99%	Yes
1976	360	98%	Yes
1977	301	82%	No
1978	337	92%	Yes
1979	247	68%	No
1980	359	98%	Yes
1981	359	98%	Yes
1982	205	56%	No
1983	214	59%	No
1984	84	23%	No
1985	257	70%	No
1986	239	65%	No
1987	200	55%	No
1988	237	65%	No
1989	364	100%	Yes
1990	363	99%	Yes
1991	357	98%	Yes
1992	351	96%	Yes
1993	344	94%	Yes
1994	334	92%	Yes
1995	348	95%	Yes
1996	280	77%	No
1997	189	52%	No
1998	313	86%	No
1999	293	80%	No
2000	352	96%	Yes
2001	153	42%	No
2002	316	87%	No
2003	360	99%	Yes
2004	358	98%	Yes
2005	344	94%	Yes
2006	353	97%	Yes
2007	350	96%	Yes
2008	347	95%	Yes
2009	115	32%	No

Latest Records

Latest records at Powder River #2
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
24 April 2009	Powder River #2, US	daily snowfall	2.5 cm (1.0 in)	2.5 cm (1.0 in)	43 years	20 of 100 (Routine)
17 April 2009	Powder River #2, US	daily snow depth	5.1 cm (2.0 in)	2.6 cm (1.0 in)	23 years	13 of 100 (Routine)
4 April 2009	Powder River #2, US	daily snowfall	10.2 cm (4.0 in)	5.1 cm (2.0 in)	23 years	20 of 100 (Routine)
4 April 2009	Powder River #2, US	daily low max (Tie)	-1.7 C (28.9 F)	tie	10 years	1 of 100 (Routine)
3 April 2009	Powder River #2, US	daily snowfall	5.1 cm (2.0 in)	2.6 cm (1.0 in)	38 years	20 of 100 (Routine)
31 March 2009	Powder River #2, US	daily low min	-16.7 C (1.9 F)	4.5 C (8.1 F)	32 years	20 of 100 (Routine)
30 March 2009	Powder River #2, US	daily snowfall	7.6 cm (3.0 in)	1.8 cm (0.7 in)	38 years	17 of 100 (Routine)
27 March 2009	Powder River #2, US	daily low min	-23.9 C (-11.0 F)	3.9 C (7.0 F)	34 years	20 of 100 (Routine)
26 March 2009	Powder River #2, US	daily low max	-0.6 C (30.9 F)	2.8 C (5.0 F)	30 years	17 of 100 (Routine)
26 March 2009	Powder River #2, US	daily snow depth (Tie)	7.6 cm (3.0 in)	tie	36 years	3 of 100 (Routine)
24 March 2009	Powder River #2, US	daily snow depth	15.2 cm (6.0 in)	5.0 cm (2.0 in)	36 years	18 of 100 (Routine)
23 March 2009	Powder River #2, US	daily snowfall	22.9 cm (9.0 in)	12.7 cm (5.0 in)	19 years	24 of 100 (Routine)
23 March 2009	Powder River #2, US	daily snow depth	22.9 cm (9.0 in)	12.7 cm (5.0 in)	19 years	20 of 100 (Routine)
22 March 2009	Powder River #2, US	daily high min	6.7 C (44.1 F)	2.3 C (4.1 F)	10 years	11 of 100 (Routine)
21 March 2009	Powder River #2, US	daily high max	21.7 C (71.1 F)	1.1 C (2.0 F)	10 years	8 of 100 (Routine)
11 March 2009	Powder River #2, US	daily low min	-25.0 C (-13.0 F)	6.1 C (11.0 F)	40 years	26 of 100 (Routine)
11 March 2009	Powder River #2, US	daily low max	-6.7 C (19.9 F)	2.3 C (4.1 F)	40 years	19 of 100 (Routine)
10 March 2009	Powder River #2, US	daily low min	-25.0 C (-13.0 F)	8.3 C (14.9 F)	40 years	30 of 100 (Routine)
10 March 2009	Powder River #2, US	daily low max	-9.4 C (15.1 F)	5.0 C (9.0 F)	40 years	23 of 100 (Routine)
4 March 2009	Powder River #2, US	daily high min	1.7 C (35.1 F)	0.6 C (1.1 F)	35 years	15 of 100 (Routine)

Climate Trend

21 complete years, 1966 to 2008

One stripe for each of 21 complete years at Powder River #2, 1966 to 2008. Blue stripes are years cooler than the station's own mean of 7.1 C (44.8 F); red stripes are warmer. The coolest year was 1975, at 5.7 C (42.3 F), and the warmest was 1981, at 9.3 C (48.7 F). The strongest colour marks a difference of 2.2 C (4.0 F).

Annual mean temperature at Powder River #2 as warming stripes, 1966 to 2008
Year	Annual mean temperature	Difference from the station mean
1966	7.7 C	+0.58 C
1967	7.3 C	+0.15 C
1972	6.1 C	-1.05 C
1973	6.2 C	-0.94 C
1974	7.7 C	+0.52 C
1975	5.7 C	-1.43 C
1976	6.9 C	-0.24 C
1980	7.8 C	+0.62 C
1981	9.3 C	+2.16 C
1989	6.6 C	-0.55 C
1990	7.0 C	-0.14 C
1991	6.8 C	-0.29 C
1992	7.3 C	+0.19 C
1995	6.7 C	-0.40 C
2000	6.7 C	-0.45 C
2003	7.2 C	+0.05 C
2004	7.1 C	-0.06 C
2005	7.8 C	+0.66 C
2006	8.0 C	+0.84 C
2007	7.8 C	+0.68 C
2008	6.3 C	-0.81 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

1964 to 2009

Yearly extremes at Powder River #2: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	42.8 C (109.0 F)	1981	37.2 C (99.0 F)	46
Coldest night (TNn)	-42.8 C (-45.0 F)	1990	-30.3 C (-22.5 F)	46
Wettest day (Rx1day)	88.9 mm (3.5 in)	2002	30.6 mm (1.2 in)	46
Wettest five days (Rx5day)	99.6 mm (3.9 in)	1993	41.9 mm (1.6 in)	46
Longest dry spell (CDD)	91 days	2000	36 days	46

Hottest day (TXx)

The hottest day of the year at Powder River #2, 1964 to 2009. The record is 42.8 C (109.0 F) in 1981, marked on the chart; the median year is 37.2 C (99.0 F).

Hottest day (TXx) at Powder River #2 by year
Year	Hottest day (TXx)
1964	27.2 C (81.0 F)
1965	36.7 C (98.1 F)
1966	38.9 C (102.0 F)
1967	39.4 C (102.9 F)
1968	37.8 C (100.0 F)
1969	38.9 C (102.0 F)
1970	38.3 C (100.9 F)
1971	33.9 C (93.0 F)
1972	35.0 C (95.0 F)
1973	37.2 C (99.0 F)
1974	36.7 C (98.1 F)
1975	36.1 C (97.0 F)
1976	37.8 C (100.0 F)
1977	36.7 C (98.1 F)
1978	36.1 C (97.0 F)
1979	38.9 C (102.0 F)
1980	38.3 C (100.9 F)
1981	42.8 C (109.0 F)
1982	37.8 C (100.0 F)
1983	38.9 C (102.0 F)
1984	35.0 C (95.0 F)
1985	36.1 C (97.0 F)
1986	36.1 C (97.0 F)
1987	37.8 C (100.0 F)
1988	37.8 C (100.0 F)
1989	37.8 C (100.0 F)
1990	37.2 C (99.0 F)
1991	37.2 C (99.0 F)
1992	34.4 C (93.9 F)
1993	34.4 C (93.9 F)
1994	35.6 C (96.1 F)
1995	38.3 C (100.9 F)
1996	36.1 C (97.0 F)
1997	36.7 C (98.1 F)
1998	37.8 C (100.0 F)
1999	36.7 C (98.1 F)
2000	37.2 C (99.0 F)
2001	26.7 C (80.1 F)
2002	38.3 C (100.9 F)
2003	37.8 C (100.0 F)
2004	35.0 C (95.0 F)
2005	38.9 C (102.0 F)
2006	38.9 C (102.0 F)
2007	37.2 C (99.0 F)
2008	36.7 C (98.1 F)
2009	23.9 C (75.0 F)

Coldest night (TNn)

The coldest night of the year at Powder River #2, 1964 to 2009. The record is -42.8 C (-45.0 F) in 1990, marked on the chart; the median year is -30.3 C (-22.5 F).

Coldest night (TNn) at Powder River #2 by year
Year	Coldest night (TNn)
1964	-35.6 C (-32.1 F)
1965	-27.2 C (-17.0 F)
1966	-27.8 C (-18.0 F)
1967	-22.8 C (-9.0 F)
1968	-31.7 C (-25.1 F)
1969	-23.9 C (-11.0 F)
1970	-30.0 C (-22.0 F)
1971	-22.8 C (-9.0 F)
1972	-31.7 C (-25.1 F)
1973	-33.9 C (-29.0 F)
1974	-30.0 C (-22.0 F)
1975	-30.6 C (-23.1 F)
1976	-30.0 C (-22.0 F)
1977	-34.4 C (-29.9 F)
1978	-33.3 C (-27.9 F)
1979	-41.1 C (-42.0 F)
1980	-33.3 C (-27.9 F)
1981	-29.4 C (-20.9 F)
1982	-33.3 C (-27.9 F)
1983	-30.6 C (-23.1 F)
1984	-25.6 C (-14.1 F)
1985	-37.2 C (-35.0 F)
1986	-31.7 C (-25.1 F)
1987	-23.3 C (-9.9 F)
1988	-24.4 C (-11.9 F)
1989	-35.0 C (-31.0 F)
1990	-42.8 C (-45.0 F)
1991	-30.0 C (-22.0 F)
1992	-26.1 C (-15.0 F)
1993	-33.3 C (-27.9 F)
1994	-28.9 C (-20.0 F)
1995	-25.6 C (-14.1 F)
1996	-33.9 C (-29.0 F)
1997	-21.1 C (-6.0 F)
1998	-33.3 C (-27.9 F)
1999	-18.9 C (-2.0 F)
2000	-27.2 C (-17.0 F)
2001	-30.6 C (-23.1 F)
2002	-26.7 C (-16.1 F)
2003	-32.2 C (-26.0 F)
2004	-28.9 C (-20.0 F)
2005	-28.9 C (-20.0 F)
2006	-34.4 C (-29.9 F)
2007	-25.6 C (-14.1 F)
2008	-32.2 C (-26.0 F)
2009	-32.8 C (-27.0 F)

Wettest day (Rx1day)

The wettest day of the year at Powder River #2, 1964 to 2009. The record is 88.9 mm (3.5 in) in 2002, marked on the chart; the median year is 30.6 mm (1.2 in).

Wettest day (Rx1day) at Powder River #2 by year
Year	Wettest day (Rx1day)
1964	16.8 mm (0.7 in)
1965	21.6 mm (0.9 in)
1966	30.0 mm (1.2 in)
1967	55.4 mm (2.2 in)
1968	24.4 mm (1.0 in)
1969	33.0 mm (1.3 in)
1970	49.5 mm (1.9 in)
1971	31.0 mm (1.2 in)
1972	11.7 mm (0.5 in)
1973	22.4 mm (0.9 in)
1974	40.6 mm (1.6 in)
1975	44.7 mm (1.8 in)
1976	23.4 mm (0.9 in)
1977	32.5 mm (1.3 in)
1978	45.5 mm (1.8 in)
1979	55.4 mm (2.2 in)
1980	16.5 mm (0.6 in)
1981	30.2 mm (1.2 in)
1982	27.4 mm (1.1 in)
1983	25.4 mm (1.0 in)
1984	8.1 mm (0.32 in)
1985	38.1 mm (1.5 in)
1986	35.6 mm (1.4 in)
1987	21.6 mm (0.9 in)
1988	9.1 mm (0.36 in)
1989	31.8 mm (1.3 in)
1990	21.3 mm (0.8 in)
1991	31.5 mm (1.2 in)
1992	22.9 mm (0.9 in)
1993	55.4 mm (2.2 in)
1994	31.0 mm (1.2 in)
1995	35.1 mm (1.4 in)
1996	27.9 mm (1.1 in)
1997	26.7 mm (1.1 in)
1998	32.5 mm (1.3 in)
1999	12.2 mm (0.5 in)
2000	33.0 mm (1.3 in)
2001	25.4 mm (1.0 in)
2002	88.9 mm (3.5 in)
2003	36.8 mm (1.4 in)
2004	16.0 mm (0.6 in)
2005	41.9 mm (1.6 in)
2006	14.0 mm (0.6 in)
2007	49.0 mm (1.9 in)
2008	40.6 mm (1.6 in)
2009	6.1 mm (0.24 in)

Wettest five days (Rx5day)

The wettest five days of the year at Powder River #2, 1964 to 2009. The record is 99.6 mm (3.9 in) in 1993, marked on the chart; the median year is 41.9 mm (1.6 in).

Wettest five days (Rx5day) at Powder River #2 by year
Year	Wettest five days (Rx5day)
1964	16.8 mm (0.7 in)
1965	30.5 mm (1.2 in)
1966	30.0 mm (1.2 in)
1967	88.5 mm (3.5 in)
1968	46.8 mm (1.8 in)
1969	45.7 mm (1.8 in)
1970	69.8 mm (2.7 in)
1971	36.6 mm (1.4 in)
1972	13.0 mm (0.5 in)
1973	55.9 mm (2.2 in)
1974	67.5 mm (2.7 in)
1975	59.7 mm (2.4 in)
1976	44.3 mm (1.7 in)
1977	67.1 mm (2.6 in)
1978	59.2 mm (2.3 in)
1979	55.4 mm (2.2 in)
1980	21.6 mm (0.9 in)
1981	59.4 mm (2.3 in)
1982	44.9 mm (1.8 in)
1983	40.6 mm (1.6 in)
1984	8.9 mm (0.35 in)
1985	38.1 mm (1.5 in)
1986	35.6 mm (1.4 in)
1987	30.5 mm (1.2 in)
1988	16.5 mm (0.6 in)
1989	43.7 mm (1.7 in)
1990	26.6 mm (1.0 in)
1991	64.8 mm (2.6 in)
1992	36.8 mm (1.4 in)
1993	99.6 mm (3.9 in)
1994	35.3 mm (1.4 in)
1995	80.8 mm (3.2 in)
1996	31.0 mm (1.2 in)
1997	26.7 mm (1.1 in)
1998	32.8 mm (1.3 in)
1999	14.7 mm (0.6 in)
2000	52.6 mm (2.1 in)
2001	50.8 mm (2.0 in)
2002	92.7 mm (3.6 in)
2003	36.8 mm (1.4 in)
2004	18.5 mm (0.7 in)
2005	43.2 mm (1.7 in)
2006	19.1 mm (0.8 in)
2007	83.1 mm (3.3 in)
2008	86.6 mm (3.4 in)
2009	10.2 mm (0.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Powder River #2, 1964 to 2009. The record is 91 days in 2000, marked on the chart; the median year is 36 days.

Longest dry spell (CDD) at Powder River #2 by year
Year	Longest dry spell (CDD)
1964	32 days
1965	73 days
1966	27 days
1967	60 days
1968	33 days
1969	74 days
1970	37 days
1971	31 days
1972	47 days
1973	22 days
1974	25 days
1975	56 days
1976	30 days
1977	24 days
1978	33 days
1979	18 days
1980	27 days
1981	35 days
1982	30 days
1983	42 days
1984	25 days
1985	28 days
1986	41 days
1987	32 days
1988	43 days
1989	34 days
1990	23 days
1991	45 days
1992	47 days
1993	30 days
1994	35 days
1995	50 days
1996	49 days
1997	53 days
1998	44 days
1999	43 days
2000	91 days
2001	22 days
2002	39 days
2003	43 days
2004	39 days
2005	41 days
2006	47 days
2007	38 days
2008	35 days
2009	26 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

21 years with a frost

Across 21 years with a frost, the median last spring frost at Powder River #2 falls on 30 May and the median first autumn frost on 14 September, which leaves a median of 112 days between them.

Frost dates and growing season at Powder River #2
Measure	Median, all years	Earliest period	Recent period (1966 to 2008)	Recent against earliest	Fitted trend
Last spring frost	30 May	n/a	30 May	n/a	n/a
First autumn frost	14 September	n/a	14 September	n/a	n/a
Growing days	112 days	n/a	112 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.

Download the Data

Data for Powder River #2 standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Powder River #2 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.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).