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Data as of 2025-12-31
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Built 2026-10-15 (15 October 2026)

Index Weather Records (USC00453909)

Record envelope, standing records and threshold days for Index (USC00453909), Washington, United States, with 62 years of record.

Key Facts for Index

  • Index (USC00453909) is a weather station in Washington, United States at 47.82 latitude and -121.55 longitude, 162 m (531 ft) above sea level.
  • The station reports from 1894 to 1955, 62 years of record.
  • 858 records set at Index still stand.
  • Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

  • Location: Washington, United States, 47.82 latitude, -121.55 longitude.
  • Elevation: 162 m (531 ft).
  • Period of record: 1894 to 1955, 62 years.
  • Eligible elements: none yet.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Index, with 2026 drawn through them The band shows the record high and record low for each calendar day at Index. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -10010203040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Index. 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 Index, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan8.9 C (48.0 F)-6.7 C (19.9 F)n/an/a
Feb18.3 C (64.9 F)1.1 C (34.0 F)n/an/a
Mar17.8 C (64.0 F)-1.1 C (30.0 F)n/an/a
Apr22.2 C (72.0 F)2.8 C (37.0 F)n/an/a
Mayn/an/an/an/a
Jun22.8 C (73.0 F)8.9 C (48.0 F)n/an/a
Jul31.1 C (88.0 F)9.4 C (48.9 F)n/an/a
Aug31.1 C (88.0 F)10.0 C (50.0 F)n/an/a
Sep30.0 C (86.0 F)20.0 C (68.0 F)n/an/a
Octn/a12.2 C (54.0 F)n/an/a
Nov13.3 C (55.9 F)1.7 C (35.1 F)n/an/a
Dec9.4 C (48.9 F)0.0 C (32.0 F)n/an/a

Which Years Hold Standing Records

858 standing records
Standing records at Index by the year they were set 858 records at Index still stand. 1895 holds the most, with 418. 02004006001894: 2281895: 4181929: 111935: 1381948: 6318941895192919351948
858 records at Index still stand. 1895 holds the most, with 418.
Standing records at Index by the year they were set
Year setStanding records
1894228
1895418
192911
1935138
194863

Wettest Day of Each Month

Jan: 179.1 mm (7.1 in)
Record daily precipitation for each month at Index The wettest day on record for each calendar month at Index. The most was 179.1 mm (7.1 in) on 22 January 1944. 050100150200 Jan: 179.1 mm (7.1 in), 22 January 1944 Jan Feb: 82.0 mm (3.2 in), 26 February 1932 Feb Mar: 103.1 mm (4.1 in), 5 March 1932 Mar Apr: 95.3 mm (3.8 in), 17 April 1938 Apr May: 59.4 mm (2.3 in), 24 May 1929 May Jun: 48.5 mm (1.9 in), 18 June 1937 Jun Jul: 45.7 mm (1.8 in), 10 July 1954 Jul Aug: 35.6 mm (1.4 in), 22 August 1952 Aug Sep: 79.0 mm (3.1 in), 30 September 1953 Sep Oct: 76.7 mm (3.0 in), 14 October 1951 Oct Nov: 134.4 mm (5.3 in), 15 November 1942 Nov Dec: 172.7 mm (6.8 in), 6 December 1939 Dec
The wettest day on record for each calendar month at Index. The most was 179.1 mm (7.1 in) on 22 January 1944.
Record daily precipitation for each month at Index
MonthRecord daily precipitation (mm)Date
Jan179.1 mm (7.1 in)22 January 1944
Feb82.0 mm (3.2 in)26 February 1932
Mar103.1 mm (4.1 in)5 March 1932
Apr95.3 mm (3.8 in)17 April 1938
May59.4 mm (2.3 in)24 May 1929
Jun48.5 mm (1.9 in)18 June 1937
Jul45.7 mm (1.8 in)10 July 1954
Aug35.6 mm (1.4 in)22 August 1952
Sep79.0 mm (3.1 in)30 September 1953
Oct76.7 mm (3.0 in)14 October 1951
Nov134.4 mm (5.3 in)15 November 1942
Dec172.7 mm (6.8 in)6 December 1939

Period of Record Coverage

1894 to 1948
Days with data per year at Index 4 years of record at Index, 1894 to 1948. 4 years have data for under 90 percent of days and are left out of rankings: 1894, 1895, 1935, 1948. 1894: 57 of 365 days1895: 116 of 365 days1935: 57 of 365 days1948: 16 of 366 days18951935
4 years of record at Index, 1894 to 1948. 4 years have data for under 90 percent of days and are left out of rankings: 1894, 1895, 1935, 1948.
Days with data per year at Index
YearDays with dataShare of yearComplete
18945716%No
189511632%No
19355716%No
1948164%No

Latest Records

0

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

Extremes by Year

1894 to 1955
Yearly extremes at Index: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)31.1 C (88.0 F)193526.7 C (80.0 F)4
Coldest night (TNn)-6.7 C (19.9 F)1929-1.1 C (30.0 F)5
Wettest day (Rx1day)179.1 mm (7.1 in)194476.7 mm (3.0 in)29
Wettest five days (Rx5day)345.0 mm (13.6 in)1904181.1 mm (7.1 in)29
Longest dry spell (CDD)70 days193020 days29

Hottest day (TXx)

Hottest day (TXx) at Index by year The hottest day of the year at Index, 1894 to 1955. The record is 31.1 C (88.0 F) in 1935, marked on the chart; the median year is 26.7 C (80.0 F). 101520253035190019201940Record: 31.1 C (88.0 F) in 1935
The hottest day of the year at Index, 1894 to 1955. The record is 31.1 C (88.0 F) in 1935, marked on the chart; the median year is 26.7 C (80.0 F).
Hottest day (TXx) at Index by year
YearHottest day (TXx)
189413.3 C (55.9 F)
189522.2 C (72.0 F)
1904n/a
1905n/a
1928n/a
1929n/a
1930n/a
1931n/a
1932n/a
193531.1 C (88.0 F)
1936n/a
1937n/a
1938n/a
1939n/a
1940n/a
1941n/a
1942n/a
1943n/a
1944n/a
1946n/a
1947n/a
194831.1 C (88.0 F)
1949n/a
1950n/a
1951n/a
1952n/a
1953n/a
1954n/a
1955n/a

Coldest night (TNn)

Coldest night (TNn) at Index by year The coldest night of the year at Index, 1894 to 1955. The record is -6.7 C (19.9 F) in 1929, marked on the chart; the median year is -1.1 C (30.0 F). -10-50510190019201940Record: -6.7 C (19.9 F) in 1929
The coldest night of the year at Index, 1894 to 1955. The record is -6.7 C (19.9 F) in 1929, marked on the chart; the median year is -1.1 C (30.0 F).
Coldest night (TNn) at Index by year
YearColdest night (TNn)
18940.0 C (32.0 F)
1895-2.2 C (28.0 F)
1904n/a
1905n/a
1928n/a
1929-6.7 C (19.9 F)
1930n/a
1931n/a
1932n/a
1935-1.1 C (30.0 F)
1936n/a
1937n/a
1938n/a
1939n/a
1940n/a
1941n/a
1942n/a
1943n/a
1944n/a
1946n/a
1947n/a
194810.0 C (50.0 F)
1949n/a
1950n/a
1951n/a
1952n/a
1953n/a
1954n/a
1955n/a

Wettest day (Rx1day)

Wettest day (Rx1day) at Index by year The wettest day of the year at Index, 1894 to 1955. The record is 179.1 mm (7.1 in) in 1944, marked on the chart; the median year is 76.7 mm (3.0 in). 050100150200190019201940Record: 179.1 mm (7.1 in) in 1944
The wettest day of the year at Index, 1894 to 1955. The record is 179.1 mm (7.1 in) in 1944, marked on the chart; the median year is 76.7 mm (3.0 in).
Wettest day (Rx1day) at Index by year
YearWettest day (Rx1day)
189469.6 mm (2.7 in)
189579.2 mm (3.1 in)
1904133.1 mm (5.2 in)
190580.5 mm (3.2 in)
192845.7 mm (1.8 in)
192972.4 mm (2.9 in)
193073.7 mm (2.9 in)
193171.6 mm (2.8 in)
1932103.1 mm (4.1 in)
193579.0 mm (3.1 in)
193674.9 mm (2.9 in)
1937134.6 mm (5.3 in)
193895.3 mm (3.8 in)
1939172.7 mm (6.8 in)
194074.9 mm (2.9 in)
194172.6 mm (2.9 in)
1942134.4 mm (5.3 in)
1943114.6 mm (4.5 in)
1944179.1 mm (7.1 in)
194686.6 mm (3.4 in)
194763.5 mm (2.5 in)
194861.0 mm (2.4 in)
194957.2 mm (2.3 in)
195048.8 mm (1.9 in)
195176.7 mm (3.0 in)
195251.6 mm (2.0 in)
195391.4 mm (3.6 in)
195457.4 mm (2.3 in)
1955102.6 mm (4.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Index by year The wettest five days of the year at Index, 1894 to 1955. The record is 345.0 mm (13.6 in) in 1904, marked on the chart; the median year is 181.1 mm (7.1 in). 0100200300400190019201940Record: 345.0 mm (13.6 in) in 1904
The wettest five days of the year at Index, 1894 to 1955. The record is 345.0 mm (13.6 in) in 1904, marked on the chart; the median year is 181.1 mm (7.1 in).
Wettest five days (Rx5day) at Index by year
YearWettest five days (Rx5day)
1894158.2 mm (6.2 in)
1895286.5 mm (11.3 in)
1904345.0 mm (13.6 in)
1905129.0 mm (5.1 in)
1928110.0 mm (4.3 in)
1929125.8 mm (5.0 in)
1930186.1 mm (7.3 in)
1931157.5 mm (6.2 in)
1932181.4 mm (7.1 in)
1935305.7 mm (12.0 in)
1936164.7 mm (6.5 in)
1937289.3 mm (11.4 in)
1938176.3 mm (6.9 in)
1939192.3 mm (7.6 in)
19400.0 mm (0.00 in)
1941165.1 mm (6.5 in)
1942181.1 mm (7.1 in)
1943248.3 mm (9.8 in)
1944182.7 mm (7.2 in)
1946178.3 mm (7.0 in)
1947217.6 mm (8.6 in)
1948162.3 mm (6.4 in)
1949133.9 mm (5.3 in)
1950130.1 mm (5.1 in)
1951195.4 mm (7.7 in)
1952108.2 mm (4.3 in)
1953270.2 mm (10.6 in)
1954216.4 mm (8.5 in)
1955201.7 mm (7.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Index by year The longest dry spell of the year at Index, 1894 to 1955. The record is 70 days in 1930, marked on the chart; the median year is 20 days. 020406080190019201940Record: 70 days in 1930
The longest dry spell of the year at Index, 1894 to 1955. The record is 70 days in 1930, marked on the chart; the median year is 20 days.
Longest dry spell (CDD) at Index by year
YearLongest dry spell (CDD)
189412 days
189511 days
190429 days
190516 days
19288 days
192912 days
193070 days
193123 days
193210 days
193519 days
193643 days
193720 days
193832 days
193939 days
194028 days
194111 days
194238 days
194325 days
19447 days
19468 days
194713 days
194818 days
194923 days
195030 days
195151 days
195237 days
195320 days
195417 days
195523 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 Index standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Index 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 . Last revised (2025-12-31).