Record envelope, standing records and threshold days for Mascoutah (USC00115405), Illinois, United States, with 62 years of record.
Key Facts for Mascoutah
Mascoutah (USC00115405) is a weather station in Illinois, United States at 38.48 latitude and -89.80 longitude, 131 m (430 ft) above sea level.
The station reports from 1893 to 1954, 62 years of record.
1,464 records set at Mascoutah still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Mascoutah set a daily record snowfall of 2.5 cm (1.0 in) on 17 April 1953.
About the Station
Location: Illinois, United States, 38.48 latitude, -89.80 longitude.
Elevation: 131 m (430 ft).
Period of record: 1893 to 1954, 62 years.
Eligible elements: tmax, tmin, prcp, snow.
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 Mascoutah. 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 Mascoutah, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
23.9 C (75.0 F)
-28.9 C (-20.0 F)
n/a
n/a
Feb
27.8 C (82.0 F)
-28.9 C (-20.0 F)
n/a
n/a
Mar
33.9 C (93.0 F)
-17.2 C (1.0 F)
n/a
n/a
Apr
33.9 C (93.0 F)
-6.1 C (21.0 F)
n/a
n/a
May
37.8 C (100.0 F)
-3.3 C (26.1 F)
n/a
n/a
Jun
41.1 C (106.0 F)
3.3 C (37.9 F)
n/a
n/a
Jul
45.0 C (113.0 F)
8.3 C (46.9 F)
n/a
n/a
Aug
43.3 C (109.9 F)
6.7 C (44.1 F)
n/a
n/a
Sep
40.6 C (105.1 F)
-4.4 C (24.1 F)
n/a
n/a
Oct
33.9 C (93.0 F)
-6.7 C (19.9 F)
n/a
n/a
Nov
28.9 C (84.0 F)
-22.2 C (-8.0 F)
n/a
n/a
Dec
22.8 C (73.0 F)
-26.1 C (-15.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Mascoutah still stand. 1911 holds the most, with 62.
Standing records at Mascoutah by the year they were set
Year set
Standing records
1898
25
1899
48
1900
14
1901
31
1902
30
1903
42
1904
29
1905
39
1906
38
1907
20
1908
32
1909
29
1910
34
1911
62
1912
25
1913
40
1914
25
1915
28
1916
30
1917
41
1918
25
1919
16
1920
17
1921
19
1922
25
1923
22
1924
27
1925
43
1926
17
1927
25
1928
26
1929
27
1930
42
1931
32
1932
27
1933
32
1934
33
1935
17
1936
61
1937
22
1938
22
1939
29
1940
35
1941
23
1942
21
1943
27
1944
19
1945
25
1946
23
1947
16
1948
7
All-Time Record Progression
5 new records
5 all-time records were set at Mascoutah between 4 August 1930 and 16 August 1946. Each dot is a new record.
When Mascoutah set new all-time records
Date
Kind
Detail
1930-08-04
Record high minimum temperature
Record high minimum temperature 28.3 C (82.9 F)
1934-07-20
Record high maximum temperature
Record high maximum temperature 43.3 C (109.9 F)
1934-07-24
Record high maximum temperature
Record high maximum temperature 44.4 C (111.9 F)
1934-07-25
Record high maximum temperature
Record high maximum temperature 45.0 C (113.0 F)
1946-08-16
Record daily precipitation
Record daily precipitation 209.3 mm (8.2 in)
Wettest Day of Each Month
Aug: 209.3 mm (8.2 in)
The wettest day on record for each calendar month at Mascoutah. The most was 209.3 mm (8.2 in) on 16 August 1946.
Record daily precipitation for each month at Mascoutah
Month
Record daily precipitation (mm)
Date
Jan
97.3 mm (3.8 in)
12 January 1916
Feb
61.5 mm (2.4 in)
13 February 1950
Mar
100.3 mm (3.9 in)
24 March 1904
Apr
76.2 mm (3.0 in)
26 April 1912
May
114.3 mm (4.5 in)
27 May 1896
Jun
101.6 mm (4.0 in)
2 June 1904
Jul
89.2 mm (3.5 in)
11 July 1909
Aug
209.3 mm (8.2 in)
16 August 1946
Sep
153.4 mm (6.0 in)
8 September 1917
Oct
107.2 mm (4.2 in)
24 October 1919
Nov
71.1 mm (2.8 in)
2 November 1936
Dec
95.5 mm (3.8 in)
18 December 1924
Period of Record Coverage
1898 to 1948
Complete yearUnder 90 percent of days
51 years of record at Mascoutah, 1898 to 1948. 5 years have data for under 90 percent of days and are left out of rankings: 1900, 1902, 1906, 1907, 1948.
Cooler than the station meanWarmer than the station mean
One stripe for each of 42 complete years at Mascoutah, 1898 to 1947. Blue stripes are years cooler than the station's own mean of 13.4 C (56.1 F); red stripes are warmer. The coolest year was 1904, at 10.8 C (51.4 F), and the warmest was 1921, at 15.3 C (59.6 F). The strongest colour marks a difference of 2.7 C (4.9 F).
Annual mean temperature at Mascoutah as warming stripes, 1898 to 1947
Year
Annual mean temperature
Difference from the station mean
1898
12.7 C
-0.68 C
1899
12.4 C
-0.99 C
1901
12.3 C
-1.10 C
1903
11.6 C
-1.81 C
1904
10.8 C
-2.62 C
1905
11.5 C
-1.90 C
1908
14.6 C
+1.16 C
1909
13.9 C
+0.48 C
1910
13.4 C
+0.03 C
1911
14.6 C
+1.20 C
1912
12.6 C
-0.86 C
1913
14.3 C
+0.89 C
1914
14.0 C
+0.56 C
1915
13.1 C
-0.35 C
1916
13.3 C
-0.12 C
1917
11.6 C
-1.81 C
1919
13.9 C
+0.49 C
1920
12.8 C
-0.58 C
1921
15.3 C
+1.90 C
1922
14.1 C
+0.69 C
1924
12.2 C
-1.24 C
1926
13.0 C
-0.41 C
1927
13.6 C
+0.16 C
1928
13.3 C
-0.13 C
1930
13.7 C
+0.24 C
1931
14.7 C
+1.33 C
1932
13.8 C
+0.42 C
1933
14.7 C
+1.28 C
1934
14.0 C
+0.63 C
1935
13.0 C
-0.41 C
1936
13.3 C
-0.14 C
1937
12.6 C
-0.80 C
1938
14.6 C
+1.16 C
1939
14.4 C
+1.02 C
1940
12.9 C
-0.52 C
1941
14.6 C
+1.21 C
1942
13.7 C
+0.32 C
1943
13.3 C
-0.10 C
1944
13.9 C
+0.45 C
1945
13.1 C
-0.29 C
1946
14.7 C
+1.30 C
1947
13.4 C
-0.01 C
The annual mean temperature here has risen by 0.3 C (0.1 to 0.5) per decade over 1898 to 1947. In Fahrenheit: 0.5 F (0.1 to 0.9) per decade. The slope is a straight line fitted to 42 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Mascoutah
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.3 C (0.1 to 0.5) per decade
0.5 F (0.1 to 0.9) per decade
1898 to 1947
42
Rise
Mean daily maximum
0.4 C (0.1 to 0.6) per decade
0.7 F (0.2 to 1.1) per decade
1898 to 1947
42
Rise
Mean daily minimum
0.20 C (0.01 to 0.38) per decade
0.35 F (0.03 to 0.68) per decade
1898 to 1947
42
Rise
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
1893 to 1954
Yearly extremes at Mascoutah: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
45.0 C (113.0 F)
1934
38.9 C (102.0 F)
51
Coldest night (TNn)
-28.9 C (-20.0 F)
1899
-20.0 C (-4.0 F)
51
Wettest day (Rx1day)
209.3 mm (8.2 in)
1946
66.7 mm (2.6 in)
62
Wettest five days (Rx5day)
388.6 mm (15.3 in)
1946
103.0 mm (4.1 in)
62
Longest dry spell (CDD)
38 days
1909
23 days
62
Hottest day (TXx)
The hottest day of the year at Mascoutah, 1893 to 1954. The record is 45.0 C (113.0 F) in 1934, marked on the chart; the median year is 38.9 C (102.0 F).
Hottest day (TXx) at Mascoutah by year
Year
Hottest day (TXx)
1893
n/a
1894
n/a
1895
n/a
1896
n/a
1897
n/a
1898
36.1 C (97.0 F)
1899
40.0 C (104.0 F)
1900
37.8 C (100.0 F)
1901
42.8 C (109.0 F)
1902
36.7 C (98.1 F)
1903
35.6 C (96.1 F)
1904
33.3 C (91.9 F)
1905
37.2 C (99.0 F)
1906
35.6 C (96.1 F)
1907
37.8 C (100.0 F)
1908
38.3 C (100.9 F)
1909
40.6 C (105.1 F)
1910
37.8 C (100.0 F)
1911
42.2 C (108.0 F)
1912
38.9 C (102.0 F)
1913
41.1 C (106.0 F)
1914
41.1 C (106.0 F)
1915
34.4 C (93.9 F)
1916
40.0 C (104.0 F)
1917
35.6 C (96.1 F)
1918
42.8 C (109.0 F)
1919
40.0 C (104.0 F)
1920
38.3 C (100.9 F)
1921
40.6 C (105.1 F)
1922
39.4 C (102.9 F)
1923
36.7 C (98.1 F)
1924
37.2 C (99.0 F)
1925
40.6 C (105.1 F)
1926
40.6 C (105.1 F)
1927
37.2 C (99.0 F)
1928
36.7 C (98.1 F)
1929
37.8 C (100.0 F)
1930
42.8 C (109.0 F)
1931
41.1 C (106.0 F)
1932
39.4 C (102.9 F)
1933
41.1 C (106.0 F)
1934
45.0 C (113.0 F)
1935
37.2 C (99.0 F)
1936
43.9 C (111.0 F)
1937
37.2 C (99.0 F)
1938
38.9 C (102.0 F)
1939
39.4 C (102.9 F)
1940
39.4 C (102.9 F)
1941
41.1 C (106.0 F)
1942
37.8 C (100.0 F)
1943
39.4 C (102.9 F)
1944
38.3 C (100.9 F)
1945
38.3 C (100.9 F)
1946
37.8 C (100.0 F)
1947
41.1 C (106.0 F)
1948
30.6 C (87.1 F)
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
Coldest night (TNn)
The coldest night of the year at Mascoutah, 1893 to 1954. The record is -28.9 C (-20.0 F) in 1899, marked on the chart; the median year is -20.0 C (-4.0 F).
Coldest night (TNn) at Mascoutah by year
Year
Coldest night (TNn)
1893
n/a
1894
n/a
1895
n/a
1896
n/a
1897
n/a
1898
-23.9 C (-11.0 F)
1899
-28.9 C (-20.0 F)
1900
-18.3 C (-0.9 F)
1901
-26.1 C (-15.0 F)
1902
-20.0 C (-4.0 F)
1903
-21.1 C (-6.0 F)
1904
-28.9 C (-20.0 F)
1905
-27.8 C (-18.0 F)
1906
-22.2 C (-8.0 F)
1907
-7.2 C (19.0 F)
1908
-13.9 C (7.0 F)
1909
-21.7 C (-7.1 F)
1910
-26.7 C (-16.1 F)
1911
-16.1 C (3.0 F)
1912
-28.3 C (-18.9 F)
1913
-20.6 C (-5.1 F)
1914
-19.4 C (-2.9 F)
1915
-26.7 C (-16.1 F)
1916
-23.3 C (-9.9 F)
1917
-23.3 C (-9.9 F)
1918
-27.8 C (-18.0 F)
1919
-18.9 C (-2.0 F)
1920
-17.8 C (0.0 F)
1921
-13.3 C (8.1 F)
1922
-16.7 C (1.9 F)
1923
-17.2 C (1.0 F)
1924
-23.9 C (-11.0 F)
1925
-18.9 C (-2.0 F)
1926
-18.9 C (-2.0 F)
1927
-20.0 C (-4.0 F)
1928
-20.6 C (-5.1 F)
1929
-22.2 C (-8.0 F)
1930
-28.9 C (-20.0 F)
1931
-13.9 C (7.0 F)
1932
-18.3 C (-0.9 F)
1933
-22.8 C (-9.0 F)
1934
-26.1 C (-15.0 F)
1935
-17.8 C (0.0 F)
1936
-23.9 C (-11.0 F)
1937
-16.1 C (3.0 F)
1938
-14.4 C (6.1 F)
1939
-17.2 C (1.0 F)
1940
-25.6 C (-14.1 F)
1941
-12.2 C (10.0 F)
1942
-21.1 C (-6.0 F)
1943
-20.6 C (-5.1 F)
1944
-17.8 C (0.0 F)
1945
-19.4 C (-2.9 F)
1946
-18.3 C (-0.9 F)
1947
-15.0 C (5.0 F)
1948
-13.3 C (8.1 F)
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
Wettest day (Rx1day)
The wettest day of the year at Mascoutah, 1893 to 1954. The record is 209.3 mm (8.2 in) in 1946, marked on the chart; the median year is 66.7 mm (2.6 in).
Wettest day (Rx1day) at Mascoutah by year
Year
Wettest day (Rx1day)
1893
78.7 mm (3.1 in)
1894
66.0 mm (2.6 in)
1895
83.8 mm (3.3 in)
1896
114.3 mm (4.5 in)
1897
99.1 mm (3.9 in)
1898
62.5 mm (2.5 in)
1899
55.4 mm (2.2 in)
1900
57.9 mm (2.3 in)
1901
50.8 mm (2.0 in)
1902
52.3 mm (2.1 in)
1903
53.8 mm (2.1 in)
1904
101.6 mm (4.0 in)
1905
119.4 mm (4.7 in)
1906
50.3 mm (2.0 in)
1907
49.8 mm (2.0 in)
1908
72.6 mm (2.9 in)
1909
89.2 mm (3.5 in)
1910
99.1 mm (3.9 in)
1911
52.8 mm (2.1 in)
1912
94.0 mm (3.7 in)
1913
63.5 mm (2.5 in)
1914
49.3 mm (1.9 in)
1915
165.1 mm (6.5 in)
1916
122.4 mm (4.8 in)
1917
153.4 mm (6.0 in)
1918
73.9 mm (2.9 in)
1919
107.2 mm (4.2 in)
1920
50.8 mm (2.0 in)
1921
61.2 mm (2.4 in)
1922
77.5 mm (3.1 in)
1923
74.9 mm (2.9 in)
1924
95.5 mm (3.8 in)
1925
69.9 mm (2.8 in)
1926
48.5 mm (1.9 in)
1927
68.8 mm (2.7 in)
1928
67.6 mm (2.7 in)
1929
56.1 mm (2.2 in)
1930
47.8 mm (1.9 in)
1931
96.8 mm (3.8 in)
1932
51.1 mm (2.0 in)
1933
50.3 mm (2.0 in)
1934
49.3 mm (1.9 in)
1935
69.9 mm (2.8 in)
1936
71.1 mm (2.8 in)
1937
48.3 mm (1.9 in)
1938
79.2 mm (3.1 in)
1939
58.9 mm (2.3 in)
1940
46.7 mm (1.8 in)
1941
101.6 mm (4.0 in)
1942
88.4 mm (3.5 in)
1943
50.8 mm (2.0 in)
1944
38.4 mm (1.5 in)
1945
70.6 mm (2.8 in)
1946
209.3 mm (8.2 in)
1947
67.3 mm (2.6 in)
1948
64.8 mm (2.6 in)
1949
56.1 mm (2.2 in)
1950
64.0 mm (2.5 in)
1951
85.1 mm (3.4 in)
1952
57.2 mm (2.3 in)
1953
32.0 mm (1.3 in)
1954
13.2 mm (0.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Mascoutah, 1893 to 1954. The record is 388.6 mm (15.3 in) in 1946, marked on the chart; the median year is 103.0 mm (4.1 in).
Wettest five days (Rx5day) at Mascoutah by year
Year
Wettest five days (Rx5day)
1893
88.9 mm (3.5 in)
1894
76.2 mm (3.0 in)
1895
88.8 mm (3.5 in)
1896
119.4 mm (4.7 in)
1897
120.2 mm (4.7 in)
1898
112.0 mm (4.4 in)
1899
78.5 mm (3.1 in)
1900
76.4 mm (3.0 in)
1901
62.2 mm (2.4 in)
1902
96.8 mm (3.8 in)
1903
77.5 mm (3.1 in)
1904
131.1 mm (5.2 in)
1905
126.2 mm (5.0 in)
1906
128.8 mm (5.1 in)
1907
75.2 mm (3.0 in)
1908
138.6 mm (5.5 in)
1909
126.1 mm (5.0 in)
1910
156.0 mm (6.1 in)
1911
102.4 mm (4.0 in)
1912
117.5 mm (4.6 in)
1913
142.0 mm (5.6 in)
1914
98.9 mm (3.9 in)
1915
251.1 mm (9.9 in)
1916
271.7 mm (10.7 in)
1917
153.4 mm (6.0 in)
1918
99.1 mm (3.9 in)
1919
142.2 mm (5.6 in)
1920
112.5 mm (4.4 in)
1921
102.6 mm (4.0 in)
1922
106.2 mm (4.2 in)
1923
98.0 mm (3.9 in)
1924
103.1 mm (4.1 in)
1925
105.7 mm (4.2 in)
1926
86.9 mm (3.4 in)
1927
126.0 mm (5.0 in)
1928
83.1 mm (3.3 in)
1929
105.7 mm (4.2 in)
1930
95.1 mm (3.7 in)
1931
116.9 mm (4.6 in)
1932
56.9 mm (2.2 in)
1933
111.8 mm (4.4 in)
1934
68.6 mm (2.7 in)
1935
95.3 mm (3.8 in)
1936
82.5 mm (3.2 in)
1937
85.1 mm (3.4 in)
1938
107.6 mm (4.2 in)
1939
71.6 mm (2.8 in)
1940
59.9 mm (2.4 in)
1941
119.1 mm (4.7 in)
1942
133.1 mm (5.2 in)
1943
129.5 mm (5.1 in)
1944
63.5 mm (2.5 in)
1945
96.0 mm (3.8 in)
1946
388.6 mm (15.3 in)
1947
103.4 mm (4.1 in)
1948
102.9 mm (4.1 in)
1949
113.3 mm (4.5 in)
1950
116.1 mm (4.6 in)
1951
100.6 mm (4.0 in)
1952
70.4 mm (2.8 in)
1953
71.8 mm (2.8 in)
1954
19.3 mm (0.8 in)
Longest dry spell (CDD)
The longest dry spell of the year at Mascoutah, 1893 to 1954. The record is 38 days in 1909, marked on the chart; the median year is 23 days.
Longest dry spell (CDD) at Mascoutah by year
Year
Longest dry spell (CDD)
1893
20 days
1894
26 days
1895
15 days
1896
30 days
1897
24 days
1898
16 days
1899
27 days
1900
29 days
1901
17 days
1902
19 days
1903
16 days
1904
12 days
1905
19 days
1906
21 days
1907
22 days
1908
32 days
1909
38 days
1910
34 days
1911
20 days
1912
18 days
1913
26 days
1914
36 days
1915
24 days
1916
18 days
1917
35 days
1918
20 days
1919
25 days
1920
26 days
1921
22 days
1922
28 days
1923
24 days
1924
23 days
1925
26 days
1926
19 days
1927
25 days
1928
18 days
1929
24 days
1930
30 days
1931
19 days
1932
20 days
1933
25 days
1934
18 days
1935
17 days
1936
22 days
1937
22 days
1938
24 days
1939
16 days
1940
35 days
1941
19 days
1942
23 days
1943
26 days
1944
28 days
1945
17 days
1946
17 days
1947
21 days
1948
23 days
1949
21 days
1950
27 days
1951
14 days
1952
24 days
1953
26 days
1954
19 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
42 years with a frost
Across 42 years with a frost, the median last spring frost at Mascoutah falls on 17 April and the median first autumn frost on 18 October, which leaves a median of 183 days between them.
Fitted over all years, the growing season changes by +1.9 days per decade at this station.
Frost dates and growing season at Mascoutah
Measure
Median, all years
Earliest period
Recent period (1914 to 1947)
Recent against earliest
Fitted trend
Last spring frost
17 April
n/a
17 April
n/a
-1.1 days per decade
First autumn frost
18 October
n/a
17 October
n/a
+0.8 days per decade
Growing days
183 days
n/a
184 days
n/a
+1.9 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, 1893 to 1953
A day with at least 67.2 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 211.9 mm (8.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Mascoutah: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
67.2 mm (2.6 in)
5 years
93.3 mm (3.7 in)
10 years
114.8 mm (4.5 in)
25 years
147.8 mm (5.8 in)
50 years
177.4 mm (7.0 in)
Longer than the 49 years of record
100 years
211.9 mm (8.3 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 1893 to 1953.
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: 209.3 mm (8.2 in) in 1946; 165.1 mm (6.5 in) in 1915; 153.4 mm (6.0 in) in 1917.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Mascoutah standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mascoutah 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.