Record envelope, standing records and threshold days for Inwood 2 SW (USC00134087), Iowa, United States, with 72 years of record.
Key Facts for Inwood 2 SW
Inwood 2 SW (USC00134087) is a weather station in Iowa, United States at 43.30 latitude and -96.47 longitude, 445 m (1,460 ft) above sea level.
The station reports from 1902 to 1973, 72 years of record.
1,464 records set at Inwood 2 SW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Inwood 2 SW set a daily record high minimum temperature of -0.6 C (30.9 F) on 18 January 1973.
About the Station
Location: Iowa, United States, 43.30 latitude, -96.47 longitude.
Elevation: 445 m (1,460 ft).
Period of record: 1902 to 1973, 72 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 Inwood 2 SW. 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 Inwood 2 SW, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
17.2 C (63.0 F)
-43.3 C (-45.9 F)
n/a
n/a
Feb
18.9 C (66.0 F)
-38.3 C (-36.9 F)
n/a
n/a
Mar
31.1 C (88.0 F)
-33.3 C (-27.9 F)
n/a
n/a
Apr
37.2 C (99.0 F)
-22.2 C (-8.0 F)
n/a
n/a
May
43.9 C (111.0 F)
-8.3 C (17.1 F)
n/a
n/a
Jun
41.1 C (106.0 F)
-0.6 C (30.9 F)
n/a
n/a
Jul
46.1 C (115.0 F)
4.4 C (39.9 F)
n/a
n/a
Aug
43.3 C (109.9 F)
0.6 C (33.1 F)
n/a
n/a
Sep
40.6 C (105.1 F)
-6.1 C (21.0 F)
n/a
n/a
Oct
34.4 C (93.9 F)
-26.1 C (-15.0 F)
n/a
n/a
Nov
25.0 C (77.0 F)
-28.9 C (-20.0 F)
n/a
n/a
Dec
18.3 C (64.9 F)
-39.4 C (-38.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Inwood 2 SW still stand. 1936 holds the most, with 68.
Standing records at Inwood 2 SW by the year they were set
Year set
Standing records
1904
13
1905
26
1906
21
1907
18
1908
24
1909
29
1910
29
1911
27
1912
26
1913
31
1914
18
1915
22
1916
23
1917
34
1918
30
1919
22
1920
16
1921
22
1922
16
1923
22
1924
31
1925
27
1926
22
1927
17
1928
27
1929
18
1930
27
1931
46
1932
20
1933
24
1934
40
1935
24
1936
68
1937
20
1938
17
1939
28
1940
18
1941
21
1942
24
1943
17
1944
19
1945
17
1946
25
1947
14
1948
15
1949
8
1950
20
1951
21
1952
16
1953
15
1954
17
1955
28
1956
16
1957
7
1958
21
1959
18
1960
13
1961
4
1962
28
1963
11
1964
15
1965
20
1966
13
1967
13
1968
14
1969
10
1970
24
1971
8
1972
8
1973
1
All-Time Record Progression
4 new records
4 all-time records were set at Inwood 2 SW between 30 May 1934 and 30 June 1970. Each dot is a new record.
When Inwood 2 SW set new all-time records
Date
Kind
Detail
1934-05-30
Record high maximum temperature
Record high maximum temperature 43.9 C (111.0 F)
1936-07-17
Record high maximum temperature
Record high maximum temperature 46.1 C (115.0 F)
1962-02-18
Record daily snowfall
Record daily snowfall 50.8 cm (20.0 in)
1970-06-30
Record high minimum temperature
Record high minimum temperature 27.8 C (82.0 F)
Wettest Day of Each Month
Jun: 124.2 mm (4.9 in)
The wettest day on record for each calendar month at Inwood 2 SW. The most was 124.2 mm (4.9 in) on 28 June 1905.
Record daily precipitation for each month at Inwood 2 SW
Month
Record daily precipitation (mm)
Date
Jan
19.1 mm (0.8 in)
26 January 1918
Feb
31.2 mm (1.2 in)
18 February 1962
Mar
76.2 mm (3.0 in)
18 March 1905
Apr
61.0 mm (2.4 in)
2 April 1967
May
98.0 mm (3.9 in)
1 May 1972
Jun
124.2 mm (4.9 in)
28 June 1905
Jul
70.1 mm (2.8 in)
7 July 1939
Aug
91.4 mm (3.6 in)
29 August 1942
Sep
108.2 mm (4.3 in)
9 September 1946
Oct
70.4 mm (2.8 in)
16 October 1968
Nov
41.9 mm (1.6 in)
19 November 1948
Dec
27.9 mm (1.1 in)
28 December 1959
Period of Record Coverage
1904 to 1973
Complete yearUnder 90 percent of days
70 years of record at Inwood 2 SW, 1904 to 1973. 2 years have data for under 90 percent of days and are left out of rankings: 1905, 1973.
Cooler than the station meanWarmer than the station mean
One stripe for each of 62 complete years at Inwood 2 SW, 1904 to 1971. Blue stripes are years cooler than the station's own mean of 7.9 C (46.2 F); red stripes are warmer. The coolest year was 1917, at 5.1 C (41.2 F), and the warmest was 1931, at 10.7 C (51.3 F). The strongest colour marks a difference of 2.9 C (5.2 F).
Annual mean temperature at Inwood 2 SW as warming stripes, 1904 to 1971
Year
Annual mean temperature
Difference from the station mean
1904
6.7 C
-1.20 C
1906
7.8 C
-0.12 C
1907
7.2 C
-0.69 C
1908
8.4 C
+0.48 C
1909
7.0 C
-0.86 C
1910
8.1 C
+0.27 C
1911
8.1 C
+0.22 C
1912
7.0 C
-0.91 C
1913
8.4 C
+0.56 C
1914
8.2 C
+0.29 C
1915
7.7 C
-0.22 C
1916
6.4 C
-1.52 C
1917
5.1 C
-2.75 C
1918
7.8 C
-0.09 C
1919
7.8 C
-0.12 C
1920
7.8 C
-0.06 C
1921
9.6 C
+1.71 C
1922
8.1 C
+0.22 C
1923
8.3 C
+0.38 C
1924
6.5 C
-1.34 C
1926
8.0 C
+0.16 C
1927
7.4 C
-0.45 C
1928
8.1 C
+0.26 C
1929
6.6 C
-1.31 C
1930
8.7 C
+0.79 C
1931
10.7 C
+2.84 C
1933
8.7 C
+0.86 C
1934
9.4 C
+1.56 C
1935
8.1 C
+0.19 C
1936
7.4 C
-0.45 C
1937
7.0 C
-0.84 C
1938
9.1 C
+1.19 C
1939
9.4 C
+1.48 C
1940
7.7 C
-0.20 C
1941
9.4 C
+1.51 C
1942
8.3 C
+0.38 C
1943
7.9 C
0.00 C
1944
8.4 C
+0.55 C
1945
7.5 C
-0.36 C
1946
8.2 C
+0.30 C
1948
8.0 C
+0.11 C
1949
8.1 C
+0.21 C
1950
6.3 C
-1.61 C
1951
5.9 C
-1.98 C
1952
8.1 C
+0.21 C
1953
8.6 C
+0.76 C
1954
8.8 C
+0.89 C
1955
8.5 C
+0.59 C
1956
8.4 C
+0.53 C
1957
8.1 C
+0.27 C
1958
8.6 C
+0.72 C
1959
7.8 C
-0.04 C
1960
7.4 C
-0.51 C
1961
7.7 C
-0.15 C
1962
7.7 C
-0.16 C
1965
7.3 C
-0.60 C
1966
7.3 C
-0.61 C
1967
7.7 C
-0.20 C
1968
8.1 C
+0.22 C
1969
6.9 C
-0.98 C
1970
7.5 C
-0.33 C
1971
7.9 C
+0.06 C
The fitted trend in annual mean temperature here over 1904 to 1971 is 0.03 C (-0.09 to 0.15) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.2 to 0.3) per decade. The slope is a straight line fitted to 62 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Inwood 2 SW
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.03 C (-0.09 to 0.15) per decade
0.1 F (-0.2 to 0.3) per decade
1904 to 1971
62
Not clearly different from zero
Mean daily maximum
0.0 C (-0.1 to 0.1) per decade
0.0 F (-0.3 to 0.3) per decade
1904 to 1971
62
Not clearly different from zero
Mean daily minimum
0.1 C (-0.1 to 0.2) per decade
0.1 F (-0.1 to 0.3) per decade
1904 to 1971
62
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
1902 to 1973
Yearly extremes at Inwood 2 SW: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
46.1 C (115.0 F)
1936
37.2 C (99.0 F)
70
Coldest night (TNn)
-43.3 C (-45.9 F)
1912
-31.1 C (-24.0 F)
70
Wettest day (Rx1day)
124.2 mm (4.9 in)
1905
50.8 mm (2.0 in)
71
Wettest five days (Rx5day)
161.5 mm (6.4 in)
1905
82.3 mm (3.2 in)
71
Longest dry spell (CDD)
77 days
1910
30 days
71
Hottest day (TXx)
The hottest day of the year at Inwood 2 SW, 1902 to 1973. The record is 46.1 C (115.0 F) in 1936, marked on the chart; the median year is 37.2 C (99.0 F).
Hottest day (TXx) at Inwood 2 SW by year
Year
Hottest day (TXx)
1902
n/a
1904
34.4 C (93.9 F)
1905
37.8 C (100.0 F)
1906
36.7 C (98.1 F)
1907
35.6 C (96.1 F)
1908
37.2 C (99.0 F)
1909
36.1 C (97.0 F)
1910
37.2 C (99.0 F)
1911
41.1 C (106.0 F)
1912
38.3 C (100.9 F)
1913
39.4 C (102.9 F)
1914
37.2 C (99.0 F)
1915
31.7 C (89.1 F)
1916
36.1 C (97.0 F)
1917
38.9 C (102.0 F)
1918
35.6 C (96.1 F)
1919
36.1 C (97.0 F)
1920
37.8 C (100.0 F)
1921
35.6 C (96.1 F)
1922
40.0 C (104.0 F)
1923
35.6 C (96.1 F)
1924
37.8 C (100.0 F)
1925
40.6 C (105.1 F)
1926
42.8 C (109.0 F)
1927
38.3 C (100.9 F)
1928
37.8 C (100.0 F)
1929
37.2 C (99.0 F)
1930
43.3 C (109.9 F)
1931
41.1 C (106.0 F)
1932
41.1 C (106.0 F)
1933
40.6 C (105.1 F)
1934
43.9 C (111.0 F)
1935
40.6 C (105.1 F)
1936
46.1 C (115.0 F)
1937
40.0 C (104.0 F)
1938
37.2 C (99.0 F)
1939
38.9 C (102.0 F)
1940
38.9 C (102.0 F)
1941
38.9 C (102.0 F)
1942
37.8 C (100.0 F)
1943
36.7 C (98.1 F)
1944
35.6 C (96.1 F)
1945
36.1 C (97.0 F)
1946
36.1 C (97.0 F)
1947
41.1 C (106.0 F)
1948
37.2 C (99.0 F)
1949
36.7 C (98.1 F)
1950
34.4 C (93.9 F)
1951
34.4 C (93.9 F)
1952
36.1 C (97.0 F)
1953
37.8 C (100.0 F)
1954
37.2 C (99.0 F)
1955
38.9 C (102.0 F)
1956
38.3 C (100.9 F)
1957
37.8 C (100.0 F)
1958
38.9 C (102.0 F)
1959
37.8 C (100.0 F)
1960
37.2 C (99.0 F)
1961
37.2 C (99.0 F)
1962
35.0 C (95.0 F)
1963
35.6 C (96.1 F)
1964
36.1 C (97.0 F)
1965
37.2 C (99.0 F)
1966
39.4 C (102.9 F)
1967
37.8 C (100.0 F)
1968
36.7 C (98.1 F)
1969
35.0 C (95.0 F)
1970
38.3 C (100.9 F)
1971
36.7 C (98.1 F)
1972
35.0 C (95.0 F)
1973
8.9 C (48.0 F)
Coldest night (TNn)
The coldest night of the year at Inwood 2 SW, 1902 to 1973. The record is -43.3 C (-45.9 F) in 1912, marked on the chart; the median year is -31.1 C (-24.0 F).
Coldest night (TNn) at Inwood 2 SW by year
Year
Coldest night (TNn)
1902
n/a
1904
-32.2 C (-26.0 F)
1905
-36.7 C (-34.1 F)
1906
-35.6 C (-32.1 F)
1907
-31.7 C (-25.1 F)
1908
-26.1 C (-15.0 F)
1909
-33.9 C (-29.0 F)
1910
-34.4 C (-29.9 F)
1911
-37.2 C (-35.0 F)
1912
-43.3 C (-45.9 F)
1913
-30.6 C (-23.1 F)
1914
-33.9 C (-29.0 F)
1915
-29.4 C (-20.9 F)
1916
-36.7 C (-34.1 F)
1917
-39.4 C (-38.9 F)
1918
-36.7 C (-34.1 F)
1919
-30.0 C (-22.0 F)
1920
-32.2 C (-26.0 F)
1921
-27.8 C (-18.0 F)
1922
-31.1 C (-24.0 F)
1923
-30.0 C (-22.0 F)
1924
-36.7 C (-34.1 F)
1925
-28.9 C (-20.0 F)
1926
-28.9 C (-20.0 F)
1927
-29.4 C (-20.9 F)
1928
-27.8 C (-18.0 F)
1929
-33.3 C (-27.9 F)
1930
-34.4 C (-29.9 F)
1931
-24.4 C (-11.9 F)
1932
-31.1 C (-24.0 F)
1933
-35.0 C (-31.0 F)
1934
-29.4 C (-20.9 F)
1935
-30.0 C (-22.0 F)
1936
-35.6 C (-32.1 F)
1937
-29.4 C (-20.9 F)
1938
-30.0 C (-22.0 F)
1939
-28.3 C (-18.9 F)
1940
-30.6 C (-23.1 F)
1941
-24.4 C (-11.9 F)
1942
-33.3 C (-27.9 F)
1943
-32.8 C (-27.0 F)
1944
-31.1 C (-24.0 F)
1945
-27.2 C (-17.0 F)
1946
-28.3 C (-18.9 F)
1947
-26.7 C (-16.1 F)
1948
-33.3 C (-27.9 F)
1949
-31.1 C (-24.0 F)
1950
-32.2 C (-26.0 F)
1951
-29.4 C (-20.9 F)
1952
-28.9 C (-20.0 F)
1953
-30.6 C (-23.1 F)
1954
-30.6 C (-23.1 F)
1955
-29.4 C (-20.9 F)
1956
-29.4 C (-20.9 F)
1957
-28.9 C (-20.0 F)
1958
-33.9 C (-29.0 F)
1959
-32.2 C (-26.0 F)
1960
-31.1 C (-24.0 F)
1961
-30.0 C (-22.0 F)
1962
-37.2 C (-35.0 F)
1963
-31.7 C (-25.1 F)
1964
-28.3 C (-18.9 F)
1965
-31.1 C (-24.0 F)
1966
-35.6 C (-32.1 F)
1967
-31.1 C (-24.0 F)
1968
-31.1 C (-24.0 F)
1969
-29.4 C (-20.9 F)
1970
-35.6 C (-32.1 F)
1971
-28.9 C (-20.0 F)
1972
-35.6 C (-32.1 F)
1973
-29.4 C (-20.9 F)
Wettest day (Rx1day)
The wettest day of the year at Inwood 2 SW, 1902 to 1973. The record is 124.2 mm (4.9 in) in 1905, marked on the chart; the median year is 50.8 mm (2.0 in).
Wettest day (Rx1day) at Inwood 2 SW by year
Year
Wettest day (Rx1day)
1902
50.8 mm (2.0 in)
1904
65.0 mm (2.6 in)
1905
124.2 mm (4.9 in)
1906
53.3 mm (2.1 in)
1907
54.4 mm (2.1 in)
1908
55.6 mm (2.2 in)
1909
64.3 mm (2.5 in)
1910
54.6 mm (2.1 in)
1911
45.7 mm (1.8 in)
1912
39.6 mm (1.6 in)
1913
45.7 mm (1.8 in)
1914
40.1 mm (1.6 in)
1915
36.8 mm (1.4 in)
1916
30.0 mm (1.2 in)
1917
46.2 mm (1.8 in)
1918
64.8 mm (2.6 in)
1919
59.2 mm (2.3 in)
1920
72.4 mm (2.9 in)
1921
40.1 mm (1.6 in)
1922
57.7 mm (2.3 in)
1923
50.8 mm (2.0 in)
1924
24.1 mm (0.9 in)
1925
39.4 mm (1.6 in)
1926
82.6 mm (3.3 in)
1927
45.2 mm (1.8 in)
1928
66.3 mm (2.6 in)
1929
47.2 mm (1.9 in)
1930
41.4 mm (1.6 in)
1931
72.1 mm (2.8 in)
1932
36.3 mm (1.4 in)
1933
106.2 mm (4.2 in)
1934
74.4 mm (2.9 in)
1935
44.7 mm (1.8 in)
1936
68.6 mm (2.7 in)
1937
67.8 mm (2.7 in)
1938
43.9 mm (1.7 in)
1939
70.1 mm (2.8 in)
1940
89.2 mm (3.5 in)
1941
53.3 mm (2.1 in)
1942
91.4 mm (3.6 in)
1943
64.3 mm (2.5 in)
1944
63.2 mm (2.5 in)
1945
43.2 mm (1.7 in)
1946
108.2 mm (4.3 in)
1947
33.5 mm (1.3 in)
1948
41.9 mm (1.6 in)
1949
55.1 mm (2.2 in)
1950
57.4 mm (2.3 in)
1951
44.5 mm (1.8 in)
1952
41.1 mm (1.6 in)
1953
81.3 mm (3.2 in)
1954
69.9 mm (2.8 in)
1955
23.6 mm (0.9 in)
1956
35.6 mm (1.4 in)
1957
39.6 mm (1.6 in)
1958
29.7 mm (1.2 in)
1959
39.1 mm (1.5 in)
1960
66.5 mm (2.6 in)
1961
44.5 mm (1.8 in)
1962
116.1 mm (4.6 in)
1963
50.3 mm (2.0 in)
1964
50.0 mm (2.0 in)
1965
42.2 mm (1.7 in)
1966
33.5 mm (1.3 in)
1967
61.0 mm (2.4 in)
1968
70.4 mm (2.8 in)
1969
49.5 mm (1.9 in)
1970
31.2 mm (1.2 in)
1971
40.6 mm (1.6 in)
1972
98.0 mm (3.9 in)
1973
5.6 mm (0.22 in)
Wettest five days (Rx5day)
The wettest five days of the year at Inwood 2 SW, 1902 to 1973. The record is 161.5 mm (6.4 in) in 1905, marked on the chart; the median year is 82.3 mm (3.2 in).
Wettest five days (Rx5day) at Inwood 2 SW by year
Year
Wettest five days (Rx5day)
1902
127.0 mm (5.0 in)
1904
67.8 mm (2.7 in)
1905
161.5 mm (6.4 in)
1906
132.3 mm (5.2 in)
1907
78.6 mm (3.1 in)
1908
83.6 mm (3.3 in)
1909
93.6 mm (3.7 in)
1910
82.2 mm (3.2 in)
1911
78.2 mm (3.1 in)
1912
42.6 mm (1.7 in)
1913
116.8 mm (4.6 in)
1914
85.6 mm (3.4 in)
1915
82.3 mm (3.2 in)
1916
49.3 mm (1.9 in)
1917
76.7 mm (3.0 in)
1918
91.5 mm (3.6 in)
1919
100.8 mm (4.0 in)
1920
80.3 mm (3.2 in)
1921
107.7 mm (4.2 in)
1922
72.2 mm (2.8 in)
1923
59.0 mm (2.3 in)
1924
45.0 mm (1.8 in)
1925
60.2 mm (2.4 in)
1926
106.9 mm (4.2 in)
1927
60.2 mm (2.4 in)
1928
100.4 mm (4.0 in)
1929
70.4 mm (2.8 in)
1930
104.4 mm (4.1 in)
1931
76.2 mm (3.0 in)
1932
77.7 mm (3.1 in)
1933
106.7 mm (4.2 in)
1934
103.9 mm (4.1 in)
1935
48.3 mm (1.9 in)
1936
110.8 mm (4.4 in)
1937
120.7 mm (4.8 in)
1938
113.2 mm (4.5 in)
1939
89.7 mm (3.5 in)
1940
107.0 mm (4.2 in)
1941
57.4 mm (2.3 in)
1942
113.3 mm (4.5 in)
1943
118.0 mm (4.6 in)
1944
103.4 mm (4.1 in)
1945
66.6 mm (2.6 in)
1946
135.7 mm (5.3 in)
1947
57.9 mm (2.3 in)
1948
52.1 mm (2.1 in)
1949
78.2 mm (3.1 in)
1950
69.0 mm (2.7 in)
1951
81.5 mm (3.2 in)
1952
76.3 mm (3.0 in)
1953
82.3 mm (3.2 in)
1954
145.6 mm (5.7 in)
1955
33.3 mm (1.3 in)
1956
62.3 mm (2.5 in)
1957
55.9 mm (2.2 in)
1958
37.1 mm (1.5 in)
1959
81.7 mm (3.2 in)
1960
83.1 mm (3.3 in)
1961
50.9 mm (2.0 in)
1962
130.8 mm (5.1 in)
1963
105.4 mm (4.1 in)
1964
107.4 mm (4.2 in)
1965
96.8 mm (3.8 in)
1966
52.0 mm (2.0 in)
1967
82.3 mm (3.2 in)
1968
130.9 mm (5.2 in)
1969
61.0 mm (2.4 in)
1970
85.0 mm (3.3 in)
1971
106.4 mm (4.2 in)
1972
127.2 mm (5.0 in)
1973
6.6 mm (0.26 in)
Longest dry spell (CDD)
The longest dry spell of the year at Inwood 2 SW, 1902 to 1973. The record is 77 days in 1910, marked on the chart; the median year is 30 days.
Longest dry spell (CDD) at Inwood 2 SW by year
Year
Longest dry spell (CDD)
1902
12 days
1904
58 days
1905
27 days
1906
24 days
1907
43 days
1908
30 days
1909
16 days
1910
77 days
1911
36 days
1912
31 days
1913
29 days
1914
43 days
1915
23 days
1916
28 days
1917
30 days
1918
20 days
1919
28 days
1920
26 days
1921
32 days
1922
22 days
1923
34 days
1924
27 days
1925
25 days
1926
29 days
1927
34 days
1928
28 days
1929
30 days
1930
34 days
1931
59 days
1932
31 days
1933
24 days
1934
35 days
1935
25 days
1936
35 days
1937
30 days
1938
23 days
1939
74 days
1940
27 days
1941
21 days
1942
38 days
1943
53 days
1944
35 days
1945
41 days
1946
28 days
1947
38 days
1948
36 days
1949
45 days
1950
29 days
1951
36 days
1952
71 days
1953
24 days
1954
34 days
1955
22 days
1956
29 days
1957
29 days
1958
38 days
1959
25 days
1960
47 days
1961
30 days
1962
52 days
1963
21 days
1964
52 days
1965
22 days
1966
27 days
1967
40 days
1968
40 days
1969
24 days
1970
32 days
1971
33 days
1972
21 days
1973
13 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
62 years with a frost
Across 62 years with a frost, the median last spring frost at Inwood 2 SW falls on 11 May and the median first autumn frost on 28 September, which leaves a median of 141 days between them.
In 1939 to 1971 the median growing season was 141 days. The two periods have the same number of growing days.
Fitted over all years, the growing season changes by +0.4 days per decade at this station.
Frost dates and growing season at Inwood 2 SW
Measure
Median, all years
Earliest period (1904 to 1936)
Recent period (1939 to 1971)
Recent against earliest
Fitted trend
Last spring frost
11 May
11 May
11 May
no change
-0.2 days per decade
First autumn frost
28 September
27 September
30 September
3 days later
+0.2 days per decade
Growing days
141 days
141 days
141 days
no change
+0.4 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
69 years, 1904 to 1972
A day with at least 51.8 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 133.3 mm (5.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Inwood 2 SW: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
51.8 mm (2.0 in)
5 years
70.7 mm (2.8 in)
10 years
84.3 mm (3.3 in)
25 years
102.8 mm (4.0 in)
50 years
117.7 mm (4.6 in)
100 years
133.3 mm (5.2 in)
Longer than the 69 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, 69 years of values from 1904 to 1972.
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: 124.2 mm (4.9 in) in 1905; 116.1 mm (4.6 in) in 1962; 108.2 mm (4.3 in) in 1946.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Inwood 2 SW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Inwood 2 SW 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.