Clearwater Weather Records (USC00502019)

Record envelope, standing records and threshold days for Clearwater (USC00502019), Alaska, United States, with 31 years of record.

Key Facts for Clearwater

Clearwater (USC00502019) is a weather station in Alaska, United States at 64.05 latitude and -145.52 longitude, 335 m (1,100 ft) above sea level.
The station reports from 1964 to 1994, 31 years of record.
1,464 records set at Clearwater still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Alaska, United States, 64.05 latitude, -145.52 longitude.
Elevation: 335 m (1,100 ft).
Period of record: 1964 to 1994, 31 years.
Eligible elements: none yet.

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 Clearwater. 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 Clearwater, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	8.9 C (48.0 F)	-57.8 C (-72.0 F)	n/a	n/a
Feb	10.0 C (50.0 F)	-52.8 C (-63.0 F)	n/a	n/a
Mar	13.3 C (55.9 F)	-47.2 C (-53.0 F)	n/a	n/a
Apr	23.3 C (73.9 F)	-36.1 C (-33.0 F)	n/a	n/a
May	31.1 C (88.0 F)	-13.9 C (7.0 F)	n/a	n/a
Jun	33.9 C (93.0 F)	-4.4 C (24.1 F)	n/a	n/a
Jul	32.8 C (91.0 F)	-2.2 C (28.0 F)	n/a	n/a
Aug	33.9 C (93.0 F)	-10.0 C (14.0 F)	n/a	n/a
Sep	25.0 C (77.0 F)	-18.9 C (-2.0 F)	n/a	n/a
Oct	17.2 C (63.0 F)	-44.4 C (-47.9 F)	n/a	n/a
Nov	15.6 C (60.1 F)	-46.1 C (-51.0 F)	n/a	n/a
Dec	8.3 C (46.9 F)	-54.4 C (-65.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Clearwater still stand. 1969 holds the most, with 90.

Standing records at Clearwater by the year they were set
Year set	Standing records
1964	31
1965	85
1966	41
1967	50
1968	50
1969	90
1970	56
1971	54
1972	73
1973	40
1974	46
1975	72
1976	42
1977	51
1978	22
1979	52
1980	52
1981	55
1982	44
1983	32
1984	27
1985	57
1986	51
1987	29
1988	35
1989	41
1990	38
1991	28
1992	51
1993	43
1994	26

Wettest Day of Each Month

Aug: 51.3 mm (2.0 in)

The wettest day on record for each calendar month at Clearwater. The most was 51.3 mm (2.0 in) on 11 August 1965.

Record daily precipitation for each month at Clearwater
Month	Record daily precipitation (mm)	Date
Jan	19.1 mm (0.8 in)	26 January 1968
Feb	16.5 mm (0.6 in)	13 February 1966
Mar	18.5 mm (0.7 in)	14 March 1967
Apr	22.1 mm (0.9 in)	19 April 1971
May	38.1 mm (1.5 in)	16 May 1975
Jun	45.7 mm (1.8 in)	20 June 1975
Jul	45.7 mm (1.8 in)	21 July 1975
Aug	51.3 mm (2.0 in)	11 August 1965
Sep	28.4 mm (1.1 in)	10 September 1990
Oct	25.7 mm (1.0 in)	18 October 1981
Nov	22.1 mm (0.9 in)	25 November 1970
Dec	25.9 mm (1.0 in)	21 December 1964

Period of Record Coverage

1964 to 1994

31 years of record at Clearwater, 1964 to 1994. 9 years have data for under 90 percent of days and are left out of rankings: 1964, 1966, 1974, 1976, 1983, 1985, 1992, 1993 and others.

Days with data per year at Clearwater
Year	Days with data	Share of year	Complete
1964	92	25%	No
1965	365	100%	Yes
1966	294	81%	No
1967	349	96%	Yes
1968	331	90%	Yes
1969	359	98%	Yes
1970	348	95%	Yes
1971	343	94%	Yes
1972	365	100%	Yes
1973	365	100%	Yes
1974	312	85%	No
1975	364	100%	Yes
1976	312	85%	No
1977	363	99%	Yes
1978	333	91%	Yes
1979	334	92%	Yes
1980	365	100%	Yes
1981	337	92%	Yes
1982	356	98%	Yes
1983	327	90%	No
1984	365	100%	Yes
1985	328	90%	No
1986	363	99%	Yes
1987	364	100%	Yes
1988	365	100%	Yes
1989	364	100%	Yes
1990	364	100%	Yes
1991	364	100%	Yes
1992	275	75%	No
1993	303	83%	No
1994	122	33%	No

Latest Records

No records were set at this station in the latest data.

Climate Trend

16 complete years, 1965 to 1991

One stripe for each of 16 complete years at Clearwater, 1965 to 1991. Blue stripes are years cooler than the station's own mean of -4.0 C (24.9 F); red stripes are warmer. The coolest year was 1971, at -7.1 C (19.3 F), and the warmest was 1987, at -2.1 C (28.3 F). The strongest colour marks a difference of 3.1 C (5.6 F).

Annual mean temperature at Clearwater as warming stripes, 1965 to 1991
Year	Annual mean temperature	Difference from the station mean
1965	-3.9 C	+0.08 C
1969	-2.9 C	+1.06 C
1971	-7.1 C	-3.09 C
1972	-6.9 C	-2.96 C
1973	-5.2 C	-1.20 C
1975	-6.5 C	-2.54 C
1977	-2.4 C	+1.61 C
1980	-2.6 C	+1.37 C
1982	-4.4 C	-0.40 C
1984	-3.3 C	+0.63 C
1986	-2.8 C	+1.20 C
1987	-2.1 C	+1.91 C
1988	-2.7 C	+1.31 C
1989	-3.6 C	+0.37 C
1990	-4.5 C	-0.50 C
1991	-2.8 C	+1.16 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 1994

Yearly extremes at Clearwater: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	33.9 C (93.0 F)	1967	31.1 C (88.0 F)	31
Coldest night (TNn)	-57.8 C (-72.0 F)	1975	-50.0 C (-58.0 F)	31
Wettest day (Rx1day)	51.3 mm (2.0 in)	1965	25.9 mm (1.0 in)	31
Wettest five days (Rx5day)	89.9 mm (3.5 in)	1975	44.0 mm (1.7 in)	31
Longest dry spell (CDD)	62 days	1989	35 days	31

Hottest day (TXx)

The hottest day of the year at Clearwater, 1964 to 1994. The record is 33.9 C (93.0 F) in 1967, marked on the chart; the median year is 31.1 C (88.0 F).

Hottest day (TXx) at Clearwater by year
Year	Hottest day (TXx)
1964	12.8 C (55.0 F)
1965	28.3 C (82.9 F)
1966	28.9 C (84.0 F)
1967	33.9 C (93.0 F)
1968	31.7 C (89.1 F)
1969	33.9 C (93.0 F)
1970	30.6 C (87.1 F)
1971	30.0 C (86.0 F)
1972	32.2 C (90.0 F)
1973	28.9 C (84.0 F)
1974	28.9 C (84.0 F)
1975	32.2 C (90.0 F)
1976	32.2 C (90.0 F)
1977	32.8 C (91.0 F)
1978	29.4 C (84.9 F)
1979	29.4 C (84.9 F)
1980	31.7 C (89.1 F)
1981	27.8 C (82.0 F)
1982	31.1 C (88.0 F)
1983	32.8 C (91.0 F)
1984	27.8 C (82.0 F)
1985	28.3 C (82.9 F)
1986	32.2 C (90.0 F)
1987	31.1 C (88.0 F)
1988	27.2 C (81.0 F)
1989	29.4 C (84.9 F)
1990	31.1 C (88.0 F)
1991	32.2 C (90.0 F)
1992	31.7 C (89.1 F)
1993	32.8 C (91.0 F)
1994	33.9 C (93.0 F)

Coldest night (TNn)

The coldest night of the year at Clearwater, 1964 to 1994. The record is -57.8 C (-72.0 F) in 1975, marked on the chart; the median year is -50.0 C (-58.0 F).

Coldest night (TNn) at Clearwater by year
Year	Coldest night (TNn)
1964	-54.4 C (-65.9 F)
1965	-53.9 C (-65.0 F)
1966	-50.6 C (-59.1 F)
1967	-50.0 C (-58.0 F)
1968	-51.7 C (-61.1 F)
1969	-50.0 C (-58.0 F)
1970	-46.7 C (-52.1 F)
1971	-57.2 C (-71.0 F)
1972	-52.8 C (-63.0 F)
1973	-53.9 C (-65.0 F)
1974	-51.1 C (-60.0 F)
1975	-57.8 C (-72.0 F)
1976	-48.9 C (-56.0 F)
1977	-45.6 C (-50.1 F)
1978	-35.6 C (-32.1 F)
1979	-52.8 C (-63.0 F)
1980	-53.9 C (-65.0 F)
1981	-45.6 C (-50.1 F)
1982	-51.1 C (-60.0 F)
1983	-52.8 C (-63.0 F)
1984	-48.3 C (-54.9 F)
1985	-47.8 C (-54.0 F)
1986	-46.1 C (-51.0 F)
1987	-43.3 C (-45.9 F)
1988	-42.2 C (-44.0 F)
1989	-54.4 C (-65.9 F)
1990	-46.7 C (-52.1 F)
1991	-49.4 C (-56.9 F)
1992	-44.4 C (-47.9 F)
1993	-48.9 C (-56.0 F)
1994	-35.6 C (-32.1 F)

Wettest day (Rx1day)

The wettest day of the year at Clearwater, 1964 to 1994. The record is 51.3 mm (2.0 in) in 1965, marked on the chart; the median year is 25.9 mm (1.0 in).

Wettest day (Rx1day) at Clearwater by year
Year	Wettest day (Rx1day)
1964	25.9 mm (1.0 in)
1965	51.3 mm (2.0 in)
1966	20.3 mm (0.8 in)
1967	30.0 mm (1.2 in)
1968	25.7 mm (1.0 in)
1969	21.8 mm (0.9 in)
1970	29.2 mm (1.1 in)
1971	22.1 mm (0.9 in)
1972	24.4 mm (1.0 in)
1973	23.9 mm (0.9 in)
1974	22.9 mm (0.9 in)
1975	45.7 mm (1.8 in)
1976	29.5 mm (1.2 in)
1977	24.6 mm (1.0 in)
1978	16.0 mm (0.6 in)
1979	25.7 mm (1.0 in)
1980	21.3 mm (0.8 in)
1981	25.7 mm (1.0 in)
1982	31.0 mm (1.2 in)
1983	30.5 mm (1.2 in)
1984	26.7 mm (1.1 in)
1985	22.1 mm (0.9 in)
1986	30.5 mm (1.2 in)
1987	34.0 mm (1.3 in)
1988	22.6 mm (0.9 in)
1989	38.4 mm (1.5 in)
1990	28.4 mm (1.1 in)
1991	32.5 mm (1.3 in)
1992	34.0 mm (1.3 in)
1993	29.7 mm (1.2 in)
1994	9.1 mm (0.36 in)

Wettest five days (Rx5day)

The wettest five days of the year at Clearwater, 1964 to 1994. The record is 89.9 mm (3.5 in) in 1975, marked on the chart; the median year is 44.0 mm (1.7 in).

Wettest five days (Rx5day) at Clearwater by year
Year	Wettest five days (Rx5day)
1964	27.2 mm (1.1 in)
1965	52.1 mm (2.1 in)
1966	43.3 mm (1.7 in)
1967	71.1 mm (2.8 in)
1968	48.4 mm (1.9 in)
1969	41.9 mm (1.6 in)
1970	37.0 mm (1.5 in)
1971	33.0 mm (1.3 in)
1972	38.1 mm (1.5 in)
1973	44.0 mm (1.7 in)
1974	31.1 mm (1.2 in)
1975	89.9 mm (3.5 in)
1976	40.3 mm (1.6 in)
1977	44.5 mm (1.8 in)
1978	31.7 mm (1.2 in)
1979	38.7 mm (1.5 in)
1980	38.4 mm (1.5 in)
1981	37.9 mm (1.5 in)
1982	50.1 mm (2.0 in)
1983	44.9 mm (1.8 in)
1984	52.1 mm (2.1 in)
1985	52.3 mm (2.1 in)
1986	55.9 mm (2.2 in)
1987	48.6 mm (1.9 in)
1988	42.6 mm (1.7 in)
1989	53.7 mm (2.1 in)
1990	62.0 mm (2.4 in)
1991	49.0 mm (1.9 in)
1992	44.4 mm (1.7 in)
1993	37.6 mm (1.5 in)
1994	9.1 mm (0.36 in)

Longest dry spell (CDD)

The longest dry spell of the year at Clearwater, 1964 to 1994. The record is 62 days in 1989, marked on the chart; the median year is 35 days.

Longest dry spell (CDD) at Clearwater by year
Year	Longest dry spell (CDD)
1964	19 days
1965	28 days
1966	27 days
1967	22 days
1968	41 days
1969	56 days
1970	31 days
1971	35 days
1972	27 days
1973	46 days
1974	46 days
1975	34 days
1976	24 days
1977	30 days
1978	36 days
1979	35 days
1980	37 days
1981	27 days
1982	22 days
1983	48 days
1984	45 days
1985	40 days
1986	37 days
1987	37 days
1988	24 days
1989	62 days
1990	46 days
1991	48 days
1992	16 days
1993	39 days
1994	17 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.

Download the Data

Data for Clearwater standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Clearwater 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.

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