Record envelope, standing records and threshold days for Wallace (USC00109493), Idaho, United States, with 56 years of record.
Key Facts for Wallace
Wallace (USC00109493) is a weather station in Idaho, United States at 47.47 latitude and -115.93 longitude, 845 m (2,772 ft) above sea level.
The station reports from 1907 to 1962, 56 years of record.
1,464 records set at Wallace still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Wallace set a daily record precipitation of 10.2 mm (0.4 in) on 7 May 1962.
About the Station
Location: Idaho, United States, 47.47 latitude, -115.93 longitude.
Elevation: 845 m (2,772 ft).
Period of record: 1907 to 1962, 56 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 Wallace. 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 Wallace, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
11.7 C (53.1 F)
-28.9 C (-20.0 F)
n/a
n/a
Feb
16.1 C (61.0 F)
-31.1 C (-24.0 F)
n/a
n/a
Mar
23.3 C (73.9 F)
-23.3 C (-9.9 F)
n/a
n/a
Apr
32.8 C (91.0 F)
-17.2 C (1.0 F)
n/a
n/a
May
36.1 C (97.0 F)
-6.7 C (19.9 F)
n/a
n/a
Jun
38.3 C (100.9 F)
-2.8 C (27.0 F)
n/a
n/a
Jul
41.7 C (107.1 F)
-1.1 C (30.0 F)
n/a
n/a
Aug
41.1 C (106.0 F)
0.0 C (32.0 F)
n/a
n/a
Sep
37.8 C (100.0 F)
-11.7 C (10.9 F)
n/a
n/a
Oct
31.7 C (89.1 F)
-17.2 C (1.0 F)
n/a
n/a
Nov
18.9 C (66.0 F)
-22.8 C (-9.0 F)
n/a
n/a
Dec
13.3 C (55.9 F)
-27.8 C (-18.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Wallace still stand. 1934 holds the most, with 89.
Standing records at Wallace by the year they were set
Year set
Standing records
1907
1
1908
35
1909
37
1910
23
1911
17
1912
26
1913
26
1914
14
1915
16
1916
31
1917
22
1918
35
1919
57
1920
24
1921
26
1922
27
1923
21
1924
61
1925
16
1926
29
1927
18
1928
22
1929
31
1930
37
1931
35
1932
28
1933
25
1934
89
1935
32
1936
42
1937
29
1938
28
1939
29
1940
29
1941
34
1942
16
1943
25
1944
22
1945
17
1946
20
1947
14
1948
15
1949
27
1950
35
1951
21
1952
12
1953
19
1954
23
1955
42
1956
20
1957
12
1958
15
1959
10
1960
26
1961
15
1962
6
All-Time Record Progression
3 new records
3 all-time records were set at Wallace between 27 July 1939 and 16 July 1955. Each dot is a new record.
When Wallace set new all-time records
Date
Kind
Detail
1939-07-27
Record high maximum temperature
Record high maximum temperature 41.7 C (107.1 F)
1946-11-18
Record daily precipitation
Record daily precipitation 75.2 mm (3.0 in)
1955-07-16
Record high minimum temperature
Record high minimum temperature 20.0 C (68.0 F)
Wettest Day of Each Month
Nov: 75.2 mm (3.0 in)
The wettest day on record for each calendar month at Wallace. The most was 75.2 mm (3.0 in) on 18 November 1946.
Record daily precipitation for each month at Wallace
Month
Record daily precipitation (mm)
Date
Jan
54.6 mm (2.1 in)
22 January 1954
Feb
50.3 mm (2.0 in)
12 February 1954
Mar
40.6 mm (1.6 in)
12 March 1946
Apr
34.5 mm (1.4 in)
2 April 1910
May
44.5 mm (1.8 in)
19 May 1957
Jun
60.5 mm (2.4 in)
8 June 1933
Jul
54.6 mm (2.1 in)
16 July 1950
Aug
48.8 mm (1.9 in)
14 August 1915
Sep
61.7 mm (2.4 in)
22 September 1926
Oct
73.9 mm (2.9 in)
3 October 1910
Nov
75.2 mm (3.0 in)
18 November 1946
Dec
68.3 mm (2.7 in)
21 December 1933
Period of Record Coverage
1907 to 1962
Complete yearUnder 90 percent of days
56 years of record at Wallace, 1907 to 1962. 6 years have data for under 90 percent of days and are left out of rankings: 1907, 1913, 1914, 1915, 1933, 1962.
Cooler than the station meanWarmer than the station mean
One stripe for each of 49 complete years at Wallace, 1908 to 1961. Blue stripes are years cooler than the station's own mean of 7.5 C (45.5 F); red stripes are warmer. The coolest year was 1955, at 5.9 C (42.5 F), and the warmest was 1940, at 9.5 C (49.1 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Wallace as warming stripes, 1908 to 1961
Year
Annual mean temperature
Difference from the station mean
1908
6.7 C
-0.87 C
1909
6.3 C
-1.28 C
1910
7.7 C
+0.16 C
1911
6.7 C
-0.85 C
1912
6.8 C
-0.75 C
1916
6.4 C
-1.18 C
1917
7.6 C
+0.05 C
1918
8.1 C
+0.54 C
1919
7.1 C
-0.43 C
1920
7.0 C
-0.54 C
1921
8.0 C
+0.44 C
1922
7.5 C
-0.07 C
1923
8.3 C
+0.72 C
1924
7.9 C
+0.41 C
1925
8.9 C
+1.37 C
1926
8.4 C
+0.82 C
1927
7.3 C
-0.20 C
1928
8.5 C
+0.97 C
1929
7.3 C
-0.27 C
1930
8.1 C
+0.61 C
1931
8.4 C
+0.90 C
1932
7.8 C
+0.29 C
1935
7.7 C
+0.19 C
1936
8.1 C
+0.57 C
1937
7.6 C
+0.09 C
1938
8.8 C
+1.22 C
1939
9.0 C
+1.45 C
1940
9.5 C
+1.97 C
1941
9.3 C
+1.74 C
1942
7.6 C
+0.11 C
1943
6.8 C
-0.69 C
1944
7.7 C
+0.20 C
1945
7.4 C
-0.14 C
1946
7.4 C
-0.14 C
1947
7.6 C
+0.03 C
1948
6.3 C
-1.24 C
1949
6.6 C
-0.94 C
1950
6.6 C
-0.98 C
1951
6.6 C
-0.93 C
1952
7.4 C
-0.16 C
1953
8.1 C
+0.56 C
1954
7.0 C
-0.57 C
1955
5.9 C
-1.67 C
1956
7.0 C
-0.55 C
1957
6.9 C
-0.60 C
1958
8.6 C
+1.04 C
1959
6.5 C
-1.02 C
1960
6.7 C
-0.81 C
1961
7.8 C
+0.28 C
The fitted trend in annual mean temperature here over 1908 to 1961 is -0.04 C (-0.19 to 0.12) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.3 to 0.2) per decade. The slope is a straight line fitted to 49 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Wallace
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.04 C (-0.19 to 0.12) per decade
-0.1 F (-0.3 to 0.2) per decade
1908 to 1961
49
Not clearly different from zero
Mean daily maximum
-0.04 C (-0.25 to 0.16) per decade
-0.1 F (-0.4 to 0.3) per decade
1908 to 1961
49
Not clearly different from zero
Mean daily minimum
-0.03 C (-0.17 to 0.11) per decade
-0.1 F (-0.3 to 0.2) per decade
1908 to 1961
49
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
1907 to 1962
Yearly extremes at Wallace: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.7 C (107.1 F)
1939
36.7 C (98.1 F)
56
Coldest night (TNn)
-31.1 C (-24.0 F)
1933
-21.9 C (-7.5 F)
56
Wettest day (Rx1day)
75.2 mm (3.0 in)
1946
43.8 mm (1.7 in)
56
Wettest five days (Rx5day)
246.9 mm (9.7 in)
1933
91.8 mm (3.6 in)
56
Longest dry spell (CDD)
72 days
1917
28 days
56
Hottest day (TXx)
The hottest day of the year at Wallace, 1907 to 1962. The record is 41.7 C (107.1 F) in 1939, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Wallace by year
Year
Hottest day (TXx)
1907
9.4 C (48.9 F)
1908
36.1 C (97.0 F)
1909
35.0 C (95.0 F)
1910
37.2 C (99.0 F)
1911
35.0 C (95.0 F)
1912
36.7 C (98.1 F)
1913
35.0 C (95.0 F)
1914
38.3 C (100.9 F)
1915
37.2 C (99.0 F)
1916
36.7 C (98.1 F)
1917
36.1 C (97.0 F)
1918
39.4 C (102.9 F)
1919
37.2 C (99.0 F)
1920
37.8 C (100.0 F)
1921
35.6 C (96.1 F)
1922
36.7 C (98.1 F)
1923
38.3 C (100.9 F)
1924
40.0 C (104.0 F)
1925
36.7 C (98.1 F)
1926
36.7 C (98.1 F)
1927
36.7 C (98.1 F)
1928
40.0 C (104.0 F)
1929
37.8 C (100.0 F)
1930
39.4 C (102.9 F)
1931
38.9 C (102.0 F)
1932
39.4 C (102.9 F)
1933
38.9 C (102.0 F)
1934
40.6 C (105.1 F)
1935
39.4 C (102.9 F)
1936
38.9 C (102.0 F)
1937
37.2 C (99.0 F)
1938
38.9 C (102.0 F)
1939
41.7 C (107.1 F)
1940
40.6 C (105.1 F)
1941
39.4 C (102.9 F)
1942
37.2 C (99.0 F)
1943
34.4 C (93.9 F)
1944
35.6 C (96.1 F)
1945
35.0 C (95.0 F)
1946
37.8 C (100.0 F)
1947
36.7 C (98.1 F)
1948
33.9 C (93.0 F)
1949
36.1 C (97.0 F)
1950
35.0 C (95.0 F)
1951
38.3 C (100.9 F)
1952
34.4 C (93.9 F)
1953
38.3 C (100.9 F)
1954
35.6 C (96.1 F)
1955
36.7 C (98.1 F)
1956
35.0 C (95.0 F)
1957
32.8 C (91.0 F)
1958
34.4 C (93.9 F)
1959
36.1 C (97.0 F)
1960
35.6 C (96.1 F)
1961
41.1 C (106.0 F)
1962
26.1 C (79.0 F)
Coldest night (TNn)
The coldest night of the year at Wallace, 1907 to 1962. The record is -31.1 C (-24.0 F) in 1933, marked on the chart; the median year is -21.9 C (-7.5 F).
Coldest night (TNn) at Wallace by year
Year
Coldest night (TNn)
1907
-15.0 C (5.0 F)
1908
-23.9 C (-11.0 F)
1909
-23.3 C (-9.9 F)
1910
-24.4 C (-11.9 F)
1911
-20.0 C (-4.0 F)
1912
-21.7 C (-7.1 F)
1913
-22.2 C (-8.0 F)
1914
-18.3 C (-0.9 F)
1915
-20.0 C (-4.0 F)
1916
-23.9 C (-11.0 F)
1917
-24.4 C (-11.9 F)
1918
-22.2 C (-8.0 F)
1919
-27.8 C (-18.0 F)
1920
-14.4 C (6.1 F)
1921
-18.3 C (-0.9 F)
1922
-24.4 C (-11.9 F)
1923
-23.9 C (-11.0 F)
1924
-27.2 C (-17.0 F)
1925
-10.0 C (14.0 F)
1926
-20.0 C (-4.0 F)
1927
-24.4 C (-11.9 F)
1928
-17.2 C (1.0 F)
1929
-25.0 C (-13.0 F)
1930
-24.4 C (-11.9 F)
1931
-18.9 C (-2.0 F)
1932
-22.2 C (-8.0 F)
1933
-31.1 C (-24.0 F)
1934
-9.4 C (15.1 F)
1935
-24.4 C (-11.9 F)
1936
-28.3 C (-18.9 F)
1937
-28.9 C (-20.0 F)
1938
-16.1 C (3.0 F)
1939
-22.2 C (-8.0 F)
1940
-14.4 C (6.1 F)
1941
-17.2 C (1.0 F)
1942
-21.7 C (-7.1 F)
1943
-25.6 C (-14.1 F)
1944
-17.8 C (0.0 F)
1945
-20.6 C (-5.1 F)
1946
-14.4 C (6.1 F)
1947
-19.4 C (-2.9 F)
1948
-17.8 C (0.0 F)
1949
-25.6 C (-14.1 F)
1950
-28.9 C (-20.0 F)
1951
-22.8 C (-9.0 F)
1952
-21.7 C (-7.1 F)
1953
-12.8 C (9.0 F)
1954
-21.7 C (-7.1 F)
1955
-23.3 C (-9.9 F)
1956
-26.1 C (-15.0 F)
1957
-24.4 C (-11.9 F)
1958
-14.4 C (6.1 F)
1959
-21.7 C (-7.1 F)
1960
-21.7 C (-7.1 F)
1961
-21.7 C (-7.1 F)
1962
-24.4 C (-11.9 F)
Wettest day (Rx1day)
The wettest day of the year at Wallace, 1907 to 1962. The record is 75.2 mm (3.0 in) in 1946, marked on the chart; the median year is 43.8 mm (1.7 in).
Wettest day (Rx1day) at Wallace by year
Year
Wettest day (Rx1day)
1907
19.8 mm (0.8 in)
1908
59.2 mm (2.3 in)
1909
58.2 mm (2.3 in)
1910
73.9 mm (2.9 in)
1911
30.0 mm (1.2 in)
1912
35.3 mm (1.4 in)
1913
31.8 mm (1.3 in)
1914
43.4 mm (1.7 in)
1915
48.8 mm (1.9 in)
1916
44.5 mm (1.8 in)
1917
63.8 mm (2.5 in)
1918
42.7 mm (1.7 in)
1919
54.4 mm (2.1 in)
1920
50.5 mm (2.0 in)
1921
37.1 mm (1.5 in)
1922
36.6 mm (1.4 in)
1923
52.6 mm (2.1 in)
1924
22.9 mm (0.9 in)
1925
33.0 mm (1.3 in)
1926
61.7 mm (2.4 in)
1927
42.4 mm (1.7 in)
1928
41.4 mm (1.6 in)
1929
40.9 mm (1.6 in)
1930
57.2 mm (2.3 in)
1931
26.4 mm (1.0 in)
1932
53.3 mm (2.1 in)
1933
68.3 mm (2.7 in)
1934
45.0 mm (1.8 in)
1935
36.3 mm (1.4 in)
1936
48.5 mm (1.9 in)
1937
38.4 mm (1.5 in)
1938
34.0 mm (1.3 in)
1939
38.1 mm (1.5 in)
1940
31.2 mm (1.2 in)
1941
49.0 mm (1.9 in)
1942
66.0 mm (2.6 in)
1943
38.6 mm (1.5 in)
1944
32.3 mm (1.3 in)
1945
43.2 mm (1.7 in)
1946
75.2 mm (3.0 in)
1947
36.1 mm (1.4 in)
1948
50.0 mm (2.0 in)
1949
53.8 mm (2.1 in)
1950
54.6 mm (2.1 in)
1951
49.5 mm (1.9 in)
1952
26.7 mm (1.1 in)
1953
49.8 mm (2.0 in)
1954
54.6 mm (2.1 in)
1955
52.1 mm (2.1 in)
1956
42.2 mm (1.7 in)
1957
44.5 mm (1.8 in)
1958
37.1 mm (1.5 in)
1959
44.2 mm (1.7 in)
1960
41.4 mm (1.6 in)
1961
51.8 mm (2.0 in)
1962
32.0 mm (1.3 in)
Wettest five days (Rx5day)
The wettest five days of the year at Wallace, 1907 to 1962. The record is 246.9 mm (9.7 in) in 1933, marked on the chart; the median year is 91.8 mm (3.6 in).
Wettest five days (Rx5day) at Wallace by year
Year
Wettest five days (Rx5day)
1907
33.6 mm (1.3 in)
1908
97.0 mm (3.8 in)
1909
156.3 mm (6.2 in)
1910
149.3 mm (5.9 in)
1911
75.7 mm (3.0 in)
1912
82.3 mm (3.2 in)
1913
82.8 mm (3.3 in)
1914
80.0 mm (3.1 in)
1915
77.0 mm (3.0 in)
1916
120.8 mm (4.8 in)
1917
170.3 mm (6.7 in)
1918
71.2 mm (2.8 in)
1919
111.1 mm (4.4 in)
1920
85.3 mm (3.4 in)
1921
92.7 mm (3.6 in)
1922
85.0 mm (3.3 in)
1923
91.9 mm (3.6 in)
1924
72.7 mm (2.9 in)
1925
111.0 mm (4.4 in)
1926
92.5 mm (3.6 in)
1927
113.0 mm (4.4 in)
1928
72.3 mm (2.8 in)
1929
108.4 mm (4.3 in)
1930
84.9 mm (3.3 in)
1931
66.9 mm (2.6 in)
1932
111.8 mm (4.4 in)
1933
246.9 mm (9.7 in)
1934
106.0 mm (4.2 in)
1935
70.4 mm (2.8 in)
1936
85.3 mm (3.4 in)
1937
110.8 mm (4.4 in)
1938
71.6 mm (2.8 in)
1939
99.0 mm (3.9 in)
1940
89.0 mm (3.5 in)
1941
106.9 mm (4.2 in)
1942
91.7 mm (3.6 in)
1943
81.8 mm (3.2 in)
1944
46.5 mm (1.8 in)
1945
77.2 mm (3.0 in)
1946
165.9 mm (6.5 in)
1947
126.2 mm (5.0 in)
1948
101.3 mm (4.0 in)
1949
106.5 mm (4.2 in)
1950
106.9 mm (4.2 in)
1951
129.8 mm (5.1 in)
1952
57.4 mm (2.3 in)
1953
86.7 mm (3.4 in)
1954
85.8 mm (3.4 in)
1955
86.6 mm (3.4 in)
1956
65.6 mm (2.6 in)
1957
95.7 mm (3.8 in)
1958
91.8 mm (3.6 in)
1959
103.6 mm (4.1 in)
1960
78.5 mm (3.1 in)
1961
98.3 mm (3.9 in)
1962
81.1 mm (3.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Wallace, 1907 to 1962. The record is 72 days in 1917, marked on the chart; the median year is 28 days.
Longest dry spell (CDD) at Wallace by year
Year
Longest dry spell (CDD)
1907
4 days
1908
27 days
1909
28 days
1910
43 days
1911
28 days
1912
13 days
1913
11 days
1914
22 days
1915
17 days
1916
23 days
1917
72 days
1918
33 days
1919
48 days
1920
25 days
1921
36 days
1922
31 days
1923
25 days
1924
28 days
1925
22 days
1926
35 days
1927
12 days
1928
36 days
1929
67 days
1930
19 days
1931
18 days
1932
36 days
1933
6 days
1934
47 days
1935
27 days
1936
24 days
1937
21 days
1938
36 days
1939
46 days
1940
36 days
1941
28 days
1942
39 days
1943
26 days
1944
25 days
1945
32 days
1946
23 days
1947
26 days
1948
28 days
1949
20 days
1950
18 days
1951
28 days
1952
47 days
1953
35 days
1954
24 days
1955
48 days
1956
21 days
1957
42 days
1958
21 days
1959
35 days
1960
30 days
1961
33 days
1962
16 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
49 years with a frost
Across 49 years with a frost, the median last spring frost at Wallace falls on 28 May and the median first autumn frost on 18 September, which leaves a median of 111 days between them.
Fitted over all years, the growing season changes by -0.7 days per decade at this station.
Frost dates and growing season at Wallace
Measure
Median, all years
Earliest period
Recent period (1930 to 1961)
Recent against earliest
Fitted trend
Last spring frost
28 May
n/a
27 May
n/a
-0.6 days per decade
First autumn frost
18 September
n/a
18 September
n/a
-1.3 days per decade
Growing days
111 days
n/a
114 days
n/a
-0.7 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
51 years, 1908 to 1961
A day with at least 44.8 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 76.0 mm (3.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Wallace: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
44.8 mm (1.8 in)
5 years
55.3 mm (2.2 in)
10 years
61.3 mm (2.4 in)
25 years
67.9 mm (2.7 in)
50 years
72.2 mm (2.8 in)
100 years
76.0 mm (3.0 in)
Longer than the 51 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, 51 years of values from 1908 to 1961.
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: 75.2 mm (3.0 in) in 1946; 73.9 mm (2.9 in) in 1910; 66.0 mm (2.6 in) in 1942.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of Wallace, at 1916 and 1942. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1916 ran 0.7 C (1.2 F) higher than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1942 ran 0.3 C (0.5 F) lower than in the years before (possible change).
Suspected changes in the annual mean temperature at Wallace, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1916
+0.7
+1.2
likely
5
1942
-0.3
-0.5
possible
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for Wallace standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Wallace 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.