Lewiston Wtp Weather Records (USC00105236)

Record envelope, standing records and threshold days for Lewiston Wtp (USC00105236), Idaho, United States, with 62 years of record.

Key Facts for Lewiston Wtp

Lewiston Wtp (USC00105236) is a weather station in Idaho, United States at 46.42 latitude and -117.02 longitude, 226 m (741 ft) above sea level.
The station reports from 1894 to 1955, 62 years of record.
1,464 records set at Lewiston Wtp still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Idaho, United States, 46.42 latitude, -117.02 longitude.
Elevation: 226 m (741 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

The band shows the record high and record low for each calendar day at Lewiston Wtp. 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 Lewiston Wtp, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	18.3 C (64.9 F)	-29.4 C (-20.9 F)	n/a	n/a
Feb	21.1 C (70.0 F)	-25.0 C (-13.0 F)	n/a	n/a
Mar	25.6 C (78.1 F)	-13.9 C (7.0 F)	n/a	n/a
Apr	37.2 C (99.0 F)	-5.6 C (21.9 F)	n/a	n/a
May	40.0 C (104.0 F)	-3.3 C (26.1 F)	n/a	n/a
Jun	42.8 C (109.0 F)	1.7 C (35.1 F)	n/a	n/a
Jul	47.2 C (117.0 F)	5.0 C (41.0 F)	n/a	n/a
Aug	43.9 C (111.0 F)	5.0 C (41.0 F)	n/a	n/a
Sep	42.2 C (108.0 F)	-1.7 C (28.9 F)	n/a	n/a
Oct	34.4 C (93.9 F)	-8.9 C (16.0 F)	n/a	n/a
Nov	23.9 C (75.0 F)	-18.9 C (-2.0 F)	n/a	n/a
Dec	18.3 C (64.9 F)	-15.0 C (5.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Lewiston Wtp still stand. 1936 holds the most, with 85.

Standing records at Lewiston Wtp by the year they were set
Year set	Standing records
1894	60
1895	64
1896	64
1897	67
1898	61
1899	62
1900	14
1934	79
1935	54
1936	85
1937	53
1938	56
1939	50
1940	48
1941	41
1942	42
1943	36
1944	46
1945	45
1946	38
1947	39
1948	28
1949	67
1950	66
1951	32
1952	31
1953	40
1954	38
1955	58

Wettest Day of Each Month

May: 41.9 mm (1.6 in)

The wettest day on record for each calendar month at Lewiston Wtp. The most was 41.9 mm (1.6 in) on 16 May 1897.

Record daily precipitation for each month at Lewiston Wtp
Month	Record daily precipitation (mm)	Date
Jan	35.6 mm (1.4 in)	12 January 1900
Feb	25.1 mm (1.0 in)	11 February 1897
Mar	24.1 mm (0.9 in)	12 March 1939
Apr	23.6 mm (0.9 in)	16 April 1935
May	41.9 mm (1.6 in)	16 May 1897
Jun	35.3 mm (1.4 in)	29 June 1941
Jul	20.6 mm (0.8 in)	5 July 1895
Aug	22.9 mm (0.9 in)	31 August 1896
Sep	36.8 mm (1.4 in)	14 September 1955
Oct	27.9 mm (1.1 in)	10 October 1955
Nov	24.1 mm (0.9 in)	8 November 1896
Dec	22.6 mm (0.9 in)	27 December 1937

Period of Record Coverage

1894 to 1955

29 years of record at Lewiston Wtp, 1894 to 1955. 6 years have data for under 90 percent of days and are left out of rankings: 1896, 1897, 1898, 1900, 1947, 1948.

Days with data per year at Lewiston Wtp
Year	Days with data	Share of year	Complete
1894	333	91%	Yes
1895	362	99%	Yes
1896	284	78%	No
1897	293	80%	No
1898	324	89%	No
1899	332	91%	Yes
1900	150	41%	No
1934	364	100%	Yes
1935	364	100%	Yes
1936	366	100%	Yes
1937	363	99%	Yes
1938	364	100%	Yes
1939	365	100%	Yes
1940	366	100%	Yes
1941	363	99%	Yes
1942	363	99%	Yes
1943	360	99%	Yes
1944	365	100%	Yes
1945	364	100%	Yes
1946	351	96%	Yes
1947	326	89%	No
1948	184	50%	No
1949	365	100%	Yes
1950	365	100%	Yes
1951	364	100%	Yes
1952	357	98%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes

Latest Records

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

Climate Trend

19 complete years, 1934 to 1955

One stripe for each of 19 complete years at Lewiston Wtp, 1934 to 1955. Blue stripes are years cooler than the station's own mean of 12.2 C (53.9 F); red stripes are warmer. The coolest year was 1955, at 11.1 C (51.9 F), and the warmest was 1934, at 14.0 C (57.2 F). The strongest colour marks a difference of 1.9 C (3.4 F).

Annual mean temperature at Lewiston Wtp as warming stripes, 1934 to 1955
Year	Annual mean temperature	Difference from the station mean
1934	14.0 C	+1.84 C
1935	11.7 C	-0.49 C
1936	11.7 C	-0.50 C
1937	11.6 C	-0.54 C
1938	12.9 C	+0.74 C
1939	13.2 C	+1.01 C
1940	13.4 C	+1.22 C
1941	12.6 C	+0.44 C
1942	11.6 C	-0.53 C
1944	12.2 C	+0.08 C
1945	11.8 C	-0.35 C
1946	12.1 C	-0.06 C
1949	11.3 C	-0.82 C
1950	11.4 C	-0.77 C
1951	11.6 C	-0.51 C
1952	12.1 C	-0.01 C
1953	12.9 C	+0.71 C
1954	11.8 C	-0.35 C
1955	11.1 C	-1.08 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

1894 to 1955

Yearly extremes at Lewiston Wtp: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	47.2 C (117.0 F)	1939	41.1 C (106.0 F)	29
Coldest night (TNn)	-29.4 C (-20.9 F)	1950	-16.1 C (3.0 F)	29
Wettest day (Rx1day)	41.9 mm (1.6 in)	1897	22.4 mm (0.9 in)	29
Wettest five days (Rx5day)	65.6 mm (2.6 in)	1940	34.7 mm (1.4 in)	29
Longest dry spell (CDD)	59 days	1939	40 days	29

Hottest day (TXx)

The hottest day of the year at Lewiston Wtp, 1894 to 1955. The record is 47.2 C (117.0 F) in 1939, marked on the chart; the median year is 41.1 C (106.0 F).

Hottest day (TXx) at Lewiston Wtp by year
Year	Hottest day (TXx)
1894	41.1 C (106.0 F)
1895	41.1 C (106.0 F)
1896	40.6 C (105.1 F)
1897	43.9 C (111.0 F)
1898	41.1 C (106.0 F)
1899	40.0 C (104.0 F)
1900	28.9 C (84.0 F)
1934	45.6 C (114.1 F)
1935	46.7 C (116.1 F)
1936	44.4 C (111.9 F)
1937	43.3 C (109.9 F)
1938	45.0 C (113.0 F)
1939	47.2 C (117.0 F)
1940	43.9 C (111.0 F)
1941	44.4 C (111.9 F)
1942	42.2 C (108.0 F)
1943	40.6 C (105.1 F)
1944	42.2 C (108.0 F)
1945	40.6 C (105.1 F)
1946	43.3 C (109.9 F)
1947	40.6 C (105.1 F)
1948	37.2 C (99.0 F)
1949	41.7 C (107.1 F)
1950	40.0 C (104.0 F)
1951	41.1 C (106.0 F)
1952	40.0 C (104.0 F)
1953	40.6 C (105.1 F)
1954	38.9 C (102.0 F)
1955	41.1 C (106.0 F)

Coldest night (TNn)

The coldest night of the year at Lewiston Wtp, 1894 to 1955. The record is -29.4 C (-20.9 F) in 1950, marked on the chart; the median year is -16.1 C (3.0 F).

Coldest night (TNn) at Lewiston Wtp by year
Year	Coldest night (TNn)
1894	-15.0 C (5.0 F)
1895	-16.7 C (1.9 F)
1896	-17.8 C (0.0 F)
1897	-17.8 C (0.0 F)
1898	-15.0 C (5.0 F)
1899	-17.2 C (1.0 F)
1900	-16.1 C (3.0 F)
1934	-2.8 C (27.0 F)
1935	-20.0 C (-4.0 F)
1936	-22.8 C (-9.0 F)
1937	-27.8 C (-18.0 F)
1938	-8.9 C (16.0 F)
1939	-15.0 C (5.0 F)
1940	-12.2 C (10.0 F)
1941	-8.9 C (16.0 F)
1942	-18.9 C (-2.0 F)
1943	-17.8 C (0.0 F)
1944	-10.0 C (14.0 F)
1945	-12.2 C (10.0 F)
1946	-8.3 C (17.1 F)
1947	-18.9 C (-2.0 F)
1948	-14.4 C (6.1 F)
1949	-22.8 C (-9.0 F)
1950	-29.4 C (-20.9 F)
1951	-15.6 C (3.9 F)
1952	-16.1 C (3.0 F)
1953	-5.0 C (23.0 F)
1954	-21.7 C (-7.1 F)
1955	-18.9 C (-2.0 F)

Wettest day (Rx1day)

The wettest day of the year at Lewiston Wtp, 1894 to 1955. The record is 41.9 mm (1.6 in) in 1897, marked on the chart; the median year is 22.4 mm (0.9 in).

Wettest day (Rx1day) at Lewiston Wtp by year
Year	Wettest day (Rx1day)
1894	19.3 mm (0.8 in)
1895	32.5 mm (1.3 in)
1896	24.1 mm (0.9 in)
1897	41.9 mm (1.6 in)
1898	21.6 mm (0.9 in)
1899	22.9 mm (0.9 in)
1900	35.6 mm (1.4 in)
1934	30.5 mm (1.2 in)
1935	23.6 mm (0.9 in)
1936	17.3 mm (0.7 in)
1937	22.6 mm (0.9 in)
1938	19.3 mm (0.8 in)
1939	24.1 mm (0.9 in)
1940	22.4 mm (0.9 in)
1941	35.3 mm (1.4 in)
1942	20.3 mm (0.8 in)
1943	15.7 mm (0.6 in)
1944	17.0 mm (0.7 in)
1945	17.3 mm (0.7 in)
1946	27.2 mm (1.1 in)
1947	21.3 mm (0.8 in)
1948	19.6 mm (0.8 in)
1949	13.2 mm (0.5 in)
1950	27.2 mm (1.1 in)
1951	23.1 mm (0.9 in)
1952	17.8 mm (0.7 in)
1953	14.5 mm (0.6 in)
1954	18.3 mm (0.7 in)
1955	36.8 mm (1.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Lewiston Wtp, 1894 to 1955. The record is 65.6 mm (2.6 in) in 1940, marked on the chart; the median year is 34.7 mm (1.4 in).

Wettest five days (Rx5day) at Lewiston Wtp by year
Year	Wettest five days (Rx5day)
1894	31.5 mm (1.2 in)
1895	34.2 mm (1.3 in)
1896	32.5 mm (1.3 in)
1897	43.9 mm (1.7 in)
1898	35.1 mm (1.4 in)
1899	42.3 mm (1.7 in)
1900	45.8 mm (1.8 in)
1934	41.4 mm (1.6 in)
1935	27.5 mm (1.1 in)
1936	20.9 mm (0.8 in)
1937	34.7 mm (1.4 in)
1938	22.3 mm (0.9 in)
1939	35.2 mm (1.4 in)
1940	65.6 mm (2.6 in)
1941	44.7 mm (1.8 in)
1942	31.5 mm (1.2 in)
1943	23.0 mm (0.9 in)
1944	24.7 mm (1.0 in)
1945	31.8 mm (1.3 in)
1946	39.4 mm (1.6 in)
1947	38.8 mm (1.5 in)
1948	24.4 mm (1.0 in)
1949	25.7 mm (1.0 in)
1950	47.3 mm (1.9 in)
1951	43.9 mm (1.7 in)
1952	26.7 mm (1.1 in)
1953	47.2 mm (1.9 in)
1954	27.7 mm (1.1 in)
1955	39.9 mm (1.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Lewiston Wtp, 1894 to 1955. The record is 59 days in 1939, marked on the chart; the median year is 40 days.

Longest dry spell (CDD) at Lewiston Wtp by year
Year	Longest dry spell (CDD)
1894	21 days
1895	54 days
1896	27 days
1897	55 days
1898	44 days
1899	34 days
1900	18 days
1934	46 days
1935	40 days
1936	53 days
1937	31 days
1938	28 days
1939	59 days
1940	38 days
1941	24 days
1942	54 days
1943	37 days
1944	47 days
1945	43 days
1946	45 days
1947	34 days
1948	28 days
1949	29 days
1950	43 days
1951	48 days
1952	50 days
1953	36 days
1954	31 days
1955	50 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 Lewiston Wtp standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Lewiston Wtp 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).