Record envelope, standing records and threshold days for Lewiston (USC00425082), Utah, United States, with 53 years of record.
Key Facts for Lewiston
Lewiston (USC00425082) is a weather station in Utah, United States at 41.97 latitude and -111.83 longitude, 1,366 m (4,482 ft) above sea level.
The station reports from 1924 to 1976, 53 years of record.
1,464 records set at Lewiston still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Lewiston set a daily record low maximum temperature of 3.9 C (39.0 F) on 27 April 1976.
About the Station
Location: Utah, United States, 41.97 latitude, -111.83 longitude.
Elevation: 1,366 m (4,482 ft).
Period of record: 1924 to 1976, 53 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Lewiston. 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, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
13.9 C (57.0 F)
-42.2 C (-44.0 F)
n/a
n/a
Feb
17.8 C (64.0 F)
-37.8 C (-36.0 F)
n/a
n/a
Mar
22.8 C (73.0 F)
-26.7 C (-16.1 F)
n/a
n/a
Apr
28.3 C (82.9 F)
-17.8 C (0.0 F)
n/a
n/a
May
32.2 C (90.0 F)
-7.2 C (19.0 F)
n/a
n/a
Jun
38.9 C (102.0 F)
-2.8 C (27.0 F)
n/a
n/a
Jul
40.0 C (104.0 F)
1.1 C (34.0 F)
n/a
n/a
Aug
40.6 C (105.1 F)
-1.7 C (28.9 F)
n/a
n/a
Sep
36.7 C (98.1 F)
-10.6 C (12.9 F)
n/a
n/a
Oct
29.4 C (84.9 F)
-12.8 C (9.0 F)
n/a
n/a
Nov
21.7 C (71.1 F)
-32.2 C (-26.0 F)
n/a
n/a
Dec
16.7 C (62.1 F)
-40.0 C (-40.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Lewiston still stand. 1934 holds the most, with 53.
Standing records at Lewiston by the year they were set
Year set
Standing records
1924
21
1925
17
1926
40
1927
21
1928
22
1929
32
1930
44
1931
48
1932
33
1933
34
1934
53
1935
19
1936
33
1937
20
1938
35
1939
35
1940
36
1941
15
1942
24
1943
26
1944
12
1945
33
1946
14
1947
32
1948
27
1949
33
1950
32
1951
33
1952
33
1953
37
1954
33
1955
38
1956
27
1957
17
1958
27
1959
24
1960
25
1961
18
1962
27
1963
25
1964
47
1965
24
1966
28
1967
22
1968
20
1969
18
1970
32
1971
14
1972
31
1973
24
1974
26
1975
11
1976
12
All-Time Record Progression
3 new records
3 all-time records were set at Lewiston between 16 November 1955 and 11 December 1972. Each dot is a new record.
When Lewiston set new all-time records
Date
Kind
Detail
1955-11-16
Record low maximum temperature
Record low maximum temperature -19.4 C (-2.9 F)
1964-06-07
Record daily precipitation
Record daily precipitation 56.4 mm (2.2 in)
1972-12-11
Record low maximum temperature
Record low maximum temperature -22.8 C (-9.0 F)
Wettest Day of Each Month
Jun: 56.4 mm (2.2 in)
The wettest day on record for each calendar month at Lewiston. The most was 56.4 mm (2.2 in) on 7 June 1964.
Record daily precipitation for each month at Lewiston
Month
Record daily precipitation (mm)
Date
Jan
26.2 mm (1.0 in)
23 January 1943
Feb
24.6 mm (1.0 in)
1 February 1963
Mar
31.2 mm (1.2 in)
13 March 1946
Apr
35.6 mm (1.4 in)
21 April 1947
May
35.1 mm (1.4 in)
5 May 1926
Jun
56.4 mm (2.2 in)
7 June 1964
Jul
30.0 mm (1.2 in)
7 July 1926
Aug
41.4 mm (1.6 in)
4 August 1951
Sep
32.0 mm (1.3 in)
29 September 1926
Oct
36.8 mm (1.4 in)
31 October 1938
Nov
33.3 mm (1.3 in)
2 November 1925
Dec
36.8 mm (1.4 in)
24 December 1955
Period of Record Coverage
1924 to 1976
Complete yearUnder 90 percent of days
53 years of record at Lewiston, 1924 to 1976. 3 years have data for under 90 percent of days and are left out of rankings: 1924, 1975, 1976.
Cooler than the station meanWarmer than the station mean
One stripe for each of 47 complete years at Lewiston, 1928 to 1974. Blue stripes are years cooler than the station's own mean of 7.4 C (45.3 F); red stripes are warmer. The coolest year was 1964, at 5.6 C (42.0 F), and the warmest was 1934, at 10.0 C (50.0 F). The strongest colour marks a difference of 2.6 C (4.7 F).
Annual mean temperature at Lewiston as warming stripes, 1928 to 1974
Year
Annual mean temperature
Difference from the station mean
1928
7.2 C
-0.19 C
1929
6.6 C
-0.77 C
1930
6.4 C
-0.97 C
1931
6.8 C
-0.57 C
1932
6.1 C
-1.27 C
1933
7.4 C
-0.02 C
1934
10.0 C
+2.59 C
1935
7.4 C
+0.02 C
1936
8.2 C
+0.78 C
1937
7.2 C
-0.23 C
1938
8.5 C
+1.09 C
1939
7.4 C
+0.01 C
1940
9.3 C
+1.85 C
1941
8.0 C
+0.63 C
1942
7.3 C
-0.15 C
1943
8.5 C
+1.05 C
1944
6.5 C
-0.92 C
1945
7.3 C
-0.07 C
1946
7.9 C
+0.52 C
1947
7.8 C
+0.39 C
1948
7.4 C
-0.04 C
1949
7.2 C
-0.24 C
1950
7.8 C
+0.40 C
1951
7.0 C
-0.40 C
1952
6.9 C
-0.48 C
1953
8.9 C
+1.44 C
1954
8.4 C
+1.01 C
1955
6.1 C
-1.33 C
1956
7.6 C
+0.14 C
1957
7.7 C
+0.30 C
1958
8.7 C
+1.32 C
1959
7.8 C
+0.38 C
1960
7.3 C
-0.11 C
1961
8.2 C
+0.78 C
1962
7.6 C
+0.17 C
1963
7.6 C
+0.18 C
1964
5.6 C
-1.85 C
1965
7.0 C
-0.41 C
1966
7.1 C
-0.31 C
1967
7.3 C
-0.07 C
1968
6.2 C
-1.21 C
1969
7.1 C
-0.35 C
1970
7.2 C
-0.23 C
1971
6.5 C
-0.89 C
1972
7.1 C
-0.34 C
1973
6.2 C
-1.18 C
1974
7.1 C
-0.33 C
The fitted trend in annual mean temperature here over 1928 to 1974 is -0.14 C (-0.32 to 0.05) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.3 F (-0.6 to 0.1) per decade. The slope is a straight line fitted to 47 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Lewiston
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.14 C (-0.32 to 0.05) per decade
-0.3 F (-0.6 to 0.1) per decade
1928 to 1974
47
Not clearly different from zero
Mean daily maximum
-0.24 C (-0.43 to -0.05) per decade
-0.4 F (-0.8 to -0.1) per decade
1928 to 1974
47
Fall
Mean daily minimum
-0.04 C (-0.25 to 0.17) per decade
-0.1 F (-0.5 to 0.3) per decade
1928 to 1974
47
Not clearly different from zero
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
1924 to 1976
Yearly extremes at Lewiston: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.6 C (105.1 F)
1940
36.7 C (98.1 F)
53
Coldest night (TNn)
-42.2 C (-44.0 F)
1937
-28.3 C (-18.9 F)
53
Wettest day (Rx1day)
56.4 mm (2.2 in)
1964
27.4 mm (1.1 in)
53
Wettest five days (Rx5day)
71.5 mm (2.8 in)
1964
46.2 mm (1.8 in)
53
Longest dry spell (CDD)
72 days
1956
37 days
53
Hottest day (TXx)
The hottest day of the year at Lewiston, 1924 to 1976. The record is 40.6 C (105.1 F) in 1940, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Lewiston by year
Year
Hottest day (TXx)
1924
35.0 C (95.0 F)
1925
37.2 C (99.0 F)
1926
36.7 C (98.1 F)
1927
34.4 C (93.9 F)
1928
36.7 C (98.1 F)
1929
36.7 C (98.1 F)
1930
37.2 C (99.0 F)
1931
40.0 C (104.0 F)
1932
36.1 C (97.0 F)
1933
38.3 C (100.9 F)
1934
37.8 C (100.0 F)
1935
37.2 C (99.0 F)
1936
39.4 C (102.9 F)
1937
36.7 C (98.1 F)
1938
36.7 C (98.1 F)
1939
37.8 C (100.0 F)
1940
40.6 C (105.1 F)
1941
36.7 C (98.1 F)
1942
37.2 C (99.0 F)
1943
37.2 C (99.0 F)
1944
35.0 C (95.0 F)
1945
36.1 C (97.0 F)
1946
35.6 C (96.1 F)
1947
36.1 C (97.0 F)
1948
36.7 C (98.1 F)
1949
37.2 C (99.0 F)
1950
36.7 C (98.1 F)
1951
37.2 C (99.0 F)
1952
34.4 C (93.9 F)
1953
35.6 C (96.1 F)
1954
37.2 C (99.0 F)
1955
36.7 C (98.1 F)
1956
36.1 C (97.0 F)
1957
35.0 C (95.0 F)
1958
37.2 C (99.0 F)
1959
36.7 C (98.1 F)
1960
37.8 C (100.0 F)
1961
37.8 C (100.0 F)
1962
36.7 C (98.1 F)
1963
35.0 C (95.0 F)
1964
34.4 C (93.9 F)
1965
34.4 C (93.9 F)
1966
35.6 C (96.1 F)
1967
34.4 C (93.9 F)
1968
34.4 C (93.9 F)
1969
35.0 C (95.0 F)
1970
35.6 C (96.1 F)
1971
36.1 C (97.0 F)
1972
35.6 C (96.1 F)
1973
36.1 C (97.0 F)
1974
37.8 C (100.0 F)
1975
37.2 C (99.0 F)
1976
28.9 C (84.0 F)
Coldest night (TNn)
The coldest night of the year at Lewiston, 1924 to 1976. The record is -42.2 C (-44.0 F) in 1937, marked on the chart; the median year is -28.3 C (-18.9 F).
Coldest night (TNn) at Lewiston by year
Year
Coldest night (TNn)
1924
-40.0 C (-40.0 F)
1925
-23.9 C (-11.0 F)
1926
-26.1 C (-15.0 F)
1927
-27.8 C (-18.0 F)
1928
-26.1 C (-15.0 F)
1929
-33.3 C (-27.9 F)
1930
-41.1 C (-42.0 F)
1931
-28.3 C (-18.9 F)
1932
-35.6 C (-32.1 F)
1933
-37.8 C (-36.0 F)
1934
-18.9 C (-2.0 F)
1935
-26.1 C (-15.0 F)
1936
-31.1 C (-24.0 F)
1937
-42.2 C (-44.0 F)
1938
-17.8 C (0.0 F)
1939
-30.0 C (-22.0 F)
1940
-23.3 C (-9.9 F)
1941
-22.2 C (-8.0 F)
1942
-33.3 C (-27.9 F)
1943
-26.1 C (-15.0 F)
1944
-29.4 C (-20.9 F)
1945
-26.7 C (-16.1 F)
1946
-25.6 C (-14.1 F)
1947
-30.0 C (-22.0 F)
1948
-28.9 C (-20.0 F)
1949
-35.6 C (-32.1 F)
1950
-29.4 C (-20.9 F)
1951
-30.6 C (-23.1 F)
1952
-29.4 C (-20.9 F)
1953
-20.0 C (-4.0 F)
1954
-27.2 C (-17.0 F)
1955
-32.2 C (-26.0 F)
1956
-28.9 C (-20.0 F)
1957
-27.8 C (-18.0 F)
1958
-23.3 C (-9.9 F)
1959
-23.9 C (-11.0 F)
1960
-31.1 C (-24.0 F)
1961
-20.6 C (-5.1 F)
1962
-33.9 C (-29.0 F)
1963
-29.4 C (-20.9 F)
1964
-31.1 C (-24.0 F)
1965
-24.4 C (-11.9 F)
1966
-25.6 C (-14.1 F)
1967
-26.7 C (-16.1 F)
1968
-28.3 C (-18.9 F)
1969
-25.0 C (-13.0 F)
1970
-26.7 C (-16.1 F)
1971
-27.8 C (-18.0 F)
1972
-37.2 C (-35.0 F)
1973
-30.0 C (-22.0 F)
1974
-30.0 C (-22.0 F)
1975
-22.8 C (-9.0 F)
1976
-28.3 C (-18.9 F)
Wettest day (Rx1day)
The wettest day of the year at Lewiston, 1924 to 1976. The record is 56.4 mm (2.2 in) in 1964, marked on the chart; the median year is 27.4 mm (1.1 in).
Wettest day (Rx1day) at Lewiston by year
Year
Wettest day (Rx1day)
1924
27.4 mm (1.1 in)
1925
33.3 mm (1.3 in)
1926
35.1 mm (1.4 in)
1927
23.6 mm (0.9 in)
1928
29.2 mm (1.1 in)
1929
26.7 mm (1.1 in)
1930
34.0 mm (1.3 in)
1931
31.2 mm (1.2 in)
1932
23.6 mm (0.9 in)
1933
35.6 mm (1.4 in)
1934
20.8 mm (0.8 in)
1935
21.1 mm (0.8 in)
1936
27.9 mm (1.1 in)
1937
26.2 mm (1.0 in)
1938
36.8 mm (1.4 in)
1939
31.8 mm (1.3 in)
1940
23.9 mm (0.9 in)
1941
26.4 mm (1.0 in)
1942
31.0 mm (1.2 in)
1943
26.7 mm (1.1 in)
1944
28.4 mm (1.1 in)
1945
28.7 mm (1.1 in)
1946
31.2 mm (1.2 in)
1947
35.6 mm (1.4 in)
1948
32.3 mm (1.3 in)
1949
33.8 mm (1.3 in)
1950
29.5 mm (1.2 in)
1951
41.4 mm (1.6 in)
1952
21.8 mm (0.9 in)
1953
24.9 mm (1.0 in)
1954
21.8 mm (0.9 in)
1955
36.8 mm (1.4 in)
1956
22.4 mm (0.9 in)
1957
33.5 mm (1.3 in)
1958
29.5 mm (1.2 in)
1959
17.3 mm (0.7 in)
1960
27.2 mm (1.1 in)
1961
26.4 mm (1.0 in)
1962
29.2 mm (1.1 in)
1963
35.3 mm (1.4 in)
1964
56.4 mm (2.2 in)
1965
28.2 mm (1.1 in)
1966
25.4 mm (1.0 in)
1967
19.1 mm (0.8 in)
1968
33.0 mm (1.3 in)
1969
26.2 mm (1.0 in)
1970
25.4 mm (1.0 in)
1971
26.4 mm (1.0 in)
1972
19.1 mm (0.8 in)
1973
25.7 mm (1.0 in)
1974
22.9 mm (0.9 in)
1975
19.1 mm (0.8 in)
1976
21.1 mm (0.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Lewiston, 1924 to 1976. The record is 71.5 mm (2.8 in) in 1964, marked on the chart; the median year is 46.2 mm (1.8 in).
Wettest five days (Rx5day) at Lewiston by year
Year
Wettest five days (Rx5day)
1924
28.7 mm (1.1 in)
1925
45.7 mm (1.8 in)
1926
46.0 mm (1.8 in)
1927
45.5 mm (1.8 in)
1928
55.6 mm (2.2 in)
1929
38.0 mm (1.5 in)
1930
46.2 mm (1.8 in)
1931
32.3 mm (1.3 in)
1932
38.8 mm (1.5 in)
1933
59.9 mm (2.4 in)
1934
49.0 mm (1.9 in)
1935
36.3 mm (1.4 in)
1936
48.3 mm (1.9 in)
1937
50.0 mm (2.0 in)
1938
64.9 mm (2.6 in)
1939
31.8 mm (1.3 in)
1940
46.2 mm (1.8 in)
1941
41.8 mm (1.6 in)
1942
52.6 mm (2.1 in)
1943
61.6 mm (2.4 in)
1944
55.9 mm (2.2 in)
1945
54.4 mm (2.1 in)
1946
44.3 mm (1.7 in)
1947
50.0 mm (2.0 in)
1948
55.7 mm (2.2 in)
1949
58.2 mm (2.3 in)
1950
52.8 mm (2.1 in)
1951
46.7 mm (1.8 in)
1952
38.0 mm (1.5 in)
1953
43.6 mm (1.7 in)
1954
44.2 mm (1.7 in)
1955
53.1 mm (2.1 in)
1956
37.9 mm (1.5 in)
1957
49.0 mm (1.9 in)
1958
41.4 mm (1.6 in)
1959
42.1 mm (1.7 in)
1960
48.5 mm (1.9 in)
1961
49.2 mm (1.9 in)
1962
44.2 mm (1.7 in)
1963
50.4 mm (2.0 in)
1964
71.5 mm (2.8 in)
1965
52.4 mm (2.1 in)
1966
36.8 mm (1.4 in)
1967
35.1 mm (1.4 in)
1968
54.8 mm (2.2 in)
1969
35.0 mm (1.4 in)
1970
42.4 mm (1.7 in)
1971
42.4 mm (1.7 in)
1972
52.4 mm (2.1 in)
1973
49.6 mm (2.0 in)
1974
46.3 mm (1.8 in)
1975
32.1 mm (1.3 in)
1976
37.6 mm (1.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Lewiston, 1924 to 1976. The record is 72 days in 1956, marked on the chart; the median year is 37 days.
Longest dry spell (CDD) at Lewiston by year
Year
Longest dry spell (CDD)
1924
21 days
1925
16 days
1926
30 days
1927
20 days
1928
38 days
1929
42 days
1930
22 days
1931
30 days
1932
38 days
1933
34 days
1934
38 days
1935
40 days
1936
32 days
1937
39 days
1938
43 days
1939
59 days
1940
54 days
1941
17 days
1942
23 days
1943
53 days
1944
37 days
1945
25 days
1946
31 days
1947
38 days
1948
40 days
1949
25 days
1950
24 days
1951
39 days
1952
62 days
1953
32 days
1954
20 days
1955
25 days
1956
72 days
1957
45 days
1958
41 days
1959
50 days
1960
29 days
1961
32 days
1962
47 days
1963
44 days
1964
51 days
1965
43 days
1966
40 days
1967
53 days
1968
27 days
1969
28 days
1970
24 days
1971
20 days
1972
25 days
1973
25 days
1974
61 days
1975
41 days
1976
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
47 years with a frost
Across 47 years with a frost, the median last spring frost at Lewiston falls on 23 May and the median first autumn frost on 15 September, which leaves a median of 114 days between them.
Fitted over all years, the growing season changes by +0.5 days per decade at this station.
Frost dates and growing season at Lewiston
Measure
Median, all years
Earliest period
Recent period (1945 to 1974)
Recent against earliest
Fitted trend
Last spring frost
23 May
n/a
24 May
n/a
-1.2 days per decade
First autumn frost
15 September
n/a
16 September
n/a
-0.7 days per decade
Growing days
114 days
n/a
115 days
n/a
+0.5 days per decade
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.
Rainfall Return Levels
49 years, 1925 to 1975
A day with at least 27.7 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 47.5 mm (1.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Lewiston: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
27.7 mm (1.1 in)
5 years
33.6 mm (1.3 in)
10 years
37.2 mm (1.5 in)
25 years
41.5 mm (1.6 in)
50 years
44.6 mm (1.8 in)
Longer than the 49 years of record
100 years
47.5 mm (1.9 in)
Longer than the 49 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, 49 years of values from 1925 to 1975.
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: 56.4 mm (2.2 in) in 1964; 41.4 mm (1.6 in) in 1951; 36.8 mm (1.4 in) in 1938.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Lewiston standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Lewiston 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.