Record envelope, standing records and threshold days for Chasm Falls (USC00301387), New York, United States, with 70 years of record.
Key Facts for Chasm Falls
Chasm Falls (USC00301387) is a weather station in New York, United States at 44.75 latitude and -74.22 longitude, 323 m (1,060 ft) above sea level.
The station reports from 1926 to 1995, 70 years of record.
1,464 records set at Chasm Falls still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Chasm Falls set a daily record high minimum temperature of 17.2 C (63.0 F) on 3 June 1995.
About the Station
Location: New York, United States, 44.75 latitude, -74.22 longitude.
Elevation: 323 m (1,060 ft).
Period of record: 1926 to 1995, 70 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 Chasm Falls. 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 Chasm Falls, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
18.9 C (66.0 F)
-41.1 C (-42.0 F)
n/a
n/a
Feb
17.8 C (64.0 F)
-41.7 C (-43.1 F)
n/a
n/a
Mar
26.7 C (80.1 F)
-33.3 C (-27.9 F)
n/a
n/a
Apr
30.6 C (87.1 F)
-20.6 C (-5.1 F)
n/a
n/a
May
32.2 C (90.0 F)
-8.9 C (16.0 F)
n/a
n/a
Jun
36.7 C (98.1 F)
-2.8 C (27.0 F)
n/a
n/a
Jul
36.1 C (97.0 F)
1.7 C (35.1 F)
n/a
n/a
Aug
37.8 C (100.0 F)
-0.6 C (30.9 F)
n/a
n/a
Sep
34.4 C (93.9 F)
-5.0 C (23.0 F)
n/a
n/a
Oct
31.1 C (88.0 F)
-13.9 C (7.0 F)
n/a
n/a
Nov
23.9 C (75.0 F)
-25.6 C (-14.1 F)
n/a
n/a
Dec
18.3 C (64.9 F)
-38.3 C (-36.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Chasm Falls still stand. 1934 holds the most, with 47.
Standing records at Chasm Falls by the year they were set
Year set
Standing records
1926
6
1927
9
1928
19
1929
4
1930
21
1931
19
1932
26
1933
39
1934
47
1935
21
1936
40
1937
18
1938
30
1939
4
1941
15
1942
27
1943
28
1944
27
1945
35
1946
34
1947
29
1948
14
1949
28
1950
27
1951
18
1952
19
1953
29
1954
24
1955
35
1956
13
1957
31
1958
11
1959
32
1960
9
1961
21
1962
21
1963
16
1964
27
1965
29
1966
19
1967
15
1968
29
1969
11
1970
14
1971
22
1972
17
1973
26
1974
13
1975
24
1976
25
1977
17
1978
20
1979
35
1980
14
1981
26
1982
20
1983
11
1984
28
1985
6
1986
9
1987
14
1988
24
1989
23
1990
25
1991
19
1992
17
1993
15
1994
15
1995
9
All-Time Record Progression
12 new records
12 all-time records were set at Chasm Falls between 18 November 1965 and 14 March 1993. Each dot is a new record.
When Chasm Falls set new all-time records
Date
Kind
Detail
1965-11-18
Record daily snowfall
Record daily snowfall 66.0 cm (26.0 in)
1971-02-10
Record snow depth
Record snow depth 109.2 cm (43.0 in)
1971-02-14
Record snow depth
Record snow depth 121.9 cm (48.0 in)
1971-03-04
Record snow depth
Record snow depth 124.5 cm (49.0 in)
1971-03-05
Record snow depth
Record snow depth 165.1 cm (65.0 in)
1971-03-08
Record snow depth
Record snow depth 167.6 cm (66.0 in)
1971-03-09
Record snow depth
Record snow depth 182.9 cm (72.0 in)
1975-07-20
Record high minimum temperature
Record high minimum temperature 23.9 C (75.0 F)
1979-07-16
Record daily precipitation
Record daily precipitation 83.8 mm (3.3 in)
1990-08-14
Record daily precipitation
Record daily precipitation 107.2 mm (4.2 in)
1993-02-06
Record low minimum temperature
Record low minimum temperature -41.7 C (-43.1 F)
1993-03-14
Record daily snowfall
Record daily snowfall 106.7 cm (42.0 in)
Wettest Day of Each Month
Aug: 107.2 mm (4.2 in)
The wettest day on record for each calendar month at Chasm Falls. The most was 107.2 mm (4.2 in) on 14 August 1990.
Record daily precipitation for each month at Chasm Falls
Month
Record daily precipitation (mm)
Date
Jan
40.6 mm (1.6 in)
21 January 1986
Feb
46.0 mm (1.8 in)
17 February 1954
Mar
62.2 mm (2.4 in)
5 March 1971
Apr
52.1 mm (2.1 in)
15 April 1942
May
49.5 mm (1.9 in)
27 May 1956
Jun
68.8 mm (2.7 in)
14 June 1929
Jul
83.8 mm (3.3 in)
16 July 1979
Aug
107.2 mm (4.2 in)
14 August 1990
Sep
75.4 mm (3.0 in)
21 September 1938
Oct
64.5 mm (2.5 in)
5 October 1932
Nov
68.6 mm (2.7 in)
2 November 1988
Dec
69.9 mm (2.8 in)
29 December 1984
Period of Record Coverage
1926 to 1995
Complete yearUnder 90 percent of days
69 years of record at Chasm Falls, 1926 to 1995. 15 years have data for under 90 percent of days and are left out of rankings: 1926, 1927, 1928, 1929, 1931, 1932, 1933, 1939 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 52 complete years at Chasm Falls, 1931 to 1994. Blue stripes are years cooler than the station's own mean of 6.0 C (42.8 F); red stripes are warmer. The coolest year was 1935, at 4.2 C (39.6 F), and the warmest was 1953, at 8.0 C (46.3 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Chasm Falls as warming stripes, 1931 to 1994
Year
Annual mean temperature
Difference from the station mean
1931
6.5 C
+0.48 C
1932
5.7 C
-0.34 C
1933
5.5 C
-0.47 C
1934
4.5 C
-1.48 C
1935
4.2 C
-1.77 C
1936
4.8 C
-1.26 C
1937
5.9 C
-0.12 C
1938
5.5 C
-0.47 C
1942
6.0 C
-0.03 C
1943
4.7 C
-1.31 C
1944
5.9 C
-0.10 C
1946
6.4 C
+0.36 C
1947
5.8 C
-0.17 C
1948
5.9 C
-0.15 C
1949
7.3 C
+1.33 C
1950
6.6 C
+0.58 C
1951
6.7 C
+0.67 C
1952
7.5 C
+1.50 C
1953
8.0 C
+1.96 C
1954
6.5 C
+0.46 C
1955
6.9 C
+0.86 C
1956
6.1 C
+0.12 C
1957
7.1 C
+1.10 C
1958
5.9 C
-0.11 C
1959
6.8 C
+0.79 C
1960
6.7 C
+0.69 C
1961
6.8 C
+0.81 C
1962
6.0 C
-0.05 C
1963
6.0 C
-0.01 C
1965
4.9 C
-1.08 C
1967
6.2 C
+0.18 C
1968
5.7 C
-0.29 C
1969
5.9 C
-0.14 C
1970
5.7 C
-0.32 C
1971
5.7 C
-0.35 C
1972
4.8 C
-1.26 C
1973
7.2 C
+1.17 C
1974
6.0 C
-0.02 C
1975
6.8 C
+0.83 C
1976
5.5 C
-0.49 C
1979
6.5 C
+0.46 C
1980
5.3 C
-0.75 C
1981
6.3 C
+0.33 C
1982
6.2 C
+0.15 C
1983
6.6 C
+0.60 C
1986
5.8 C
-0.26 C
1987
6.0 C
0.00 C
1988
6.2 C
+0.18 C
1989
4.5 C
-1.52 C
1990
5.7 C
-0.29 C
1991
5.6 C
-0.37 C
1994
5.6 C
-0.45 C
The fitted trend in annual mean temperature here over 1931 to 1994 is 0.01 C (-0.11 to 0.14) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.02 F (-0.20 to 0.24) per decade. The slope is a straight line fitted to 52 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Chasm Falls
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.01 C (-0.11 to 0.14) per decade
0.02 F (-0.20 to 0.24) per decade
1931 to 1994
52
Not clearly different from zero
Mean daily maximum
-0.07 C (-0.19 to 0.05) per decade
-0.1 F (-0.3 to 0.1) per decade
1931 to 1994
52
Not clearly different from zero
Mean daily minimum
0.10 C (-0.04 to 0.24) per decade
0.2 F (-0.1 to 0.4) per decade
1931 to 1994
52
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
1926 to 1995
Yearly extremes at Chasm Falls: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
37.8 C (100.0 F)
1944
32.2 C (90.0 F)
69
Coldest night (TNn)
-41.7 C (-43.1 F)
1993
-32.2 C (-26.0 F)
69
Wettest day (Rx1day)
107.2 mm (4.2 in)
1990
46.0 mm (1.8 in)
69
Wettest five days (Rx5day)
127.1 mm (5.0 in)
1988
79.5 mm (3.1 in)
69
Longest dry spell (CDD)
23 days
1965
13 days
69
Hottest day (TXx)
The hottest day of the year at Chasm Falls, 1926 to 1995. The record is 37.8 C (100.0 F) in 1944, marked on the chart; the median year is 32.2 C (90.0 F).
Hottest day (TXx) at Chasm Falls by year
Year
Hottest day (TXx)
1926
31.1 C (88.0 F)
1927
33.3 C (91.9 F)
1928
30.0 C (86.0 F)
1929
30.0 C (86.0 F)
1930
34.4 C (93.9 F)
1931
36.1 C (97.0 F)
1932
33.3 C (91.9 F)
1933
34.4 C (93.9 F)
1934
34.4 C (93.9 F)
1935
33.9 C (93.0 F)
1936
31.7 C (89.1 F)
1937
32.8 C (91.0 F)
1938
33.3 C (91.9 F)
1939
8.9 C (48.0 F)
1941
35.6 C (96.1 F)
1942
32.8 C (91.0 F)
1943
31.7 C (89.1 F)
1944
37.8 C (100.0 F)
1945
33.3 C (91.9 F)
1946
33.3 C (91.9 F)
1947
33.9 C (93.0 F)
1948
33.9 C (93.0 F)
1949
33.9 C (93.0 F)
1950
32.2 C (90.0 F)
1951
31.1 C (88.0 F)
1952
34.4 C (93.9 F)
1953
34.4 C (93.9 F)
1954
30.6 C (87.1 F)
1955
34.4 C (93.9 F)
1956
36.7 C (98.1 F)
1957
32.2 C (90.0 F)
1958
31.1 C (88.0 F)
1959
32.8 C (91.0 F)
1960
32.2 C (90.0 F)
1961
32.2 C (90.0 F)
1962
31.7 C (89.1 F)
1963
34.4 C (93.9 F)
1964
31.1 C (88.0 F)
1965
32.2 C (90.0 F)
1966
33.3 C (91.9 F)
1967
31.1 C (88.0 F)
1968
32.2 C (90.0 F)
1969
32.2 C (90.0 F)
1970
32.8 C (91.0 F)
1971
32.8 C (91.0 F)
1972
30.6 C (87.1 F)
1973
32.2 C (90.0 F)
1974
32.2 C (90.0 F)
1975
35.0 C (95.0 F)
1976
31.7 C (89.1 F)
1977
34.4 C (93.9 F)
1978
32.2 C (90.0 F)
1979
32.8 C (91.0 F)
1980
31.1 C (88.0 F)
1981
31.7 C (89.1 F)
1982
31.7 C (89.1 F)
1983
33.9 C (93.0 F)
1984
32.2 C (90.0 F)
1985
30.0 C (86.0 F)
1986
30.6 C (87.1 F)
1987
32.2 C (90.0 F)
1988
33.9 C (93.0 F)
1989
31.1 C (88.0 F)
1990
28.9 C (84.0 F)
1991
31.1 C (88.0 F)
1992
29.4 C (84.9 F)
1993
33.3 C (91.9 F)
1994
35.0 C (95.0 F)
1995
29.4 C (84.9 F)
Coldest night (TNn)
The coldest night of the year at Chasm Falls, 1926 to 1995. The record is -41.7 C (-43.1 F) in 1993, marked on the chart; the median year is -32.2 C (-26.0 F).
Coldest night (TNn) at Chasm Falls by year
Year
Coldest night (TNn)
1926
-23.3 C (-9.9 F)
1927
-28.9 C (-20.0 F)
1928
-26.7 C (-16.1 F)
1929
-25.6 C (-14.1 F)
1930
-30.6 C (-23.1 F)
1931
-28.9 C (-20.0 F)
1932
-31.1 C (-24.0 F)
1933
-38.3 C (-36.9 F)
1934
-37.8 C (-36.0 F)
1935
-35.6 C (-32.1 F)
1936
-28.9 C (-20.0 F)
1937
-25.0 C (-13.0 F)
1938
-33.3 C (-27.9 F)
1939
-34.4 C (-29.9 F)
1941
-27.2 C (-17.0 F)
1942
-36.7 C (-34.1 F)
1943
-35.6 C (-32.1 F)
1944
-31.7 C (-25.1 F)
1945
-34.4 C (-29.9 F)
1946
-33.3 C (-27.9 F)
1947
-30.0 C (-22.0 F)
1948
-34.4 C (-29.9 F)
1949
-25.6 C (-14.1 F)
1950
-33.9 C (-29.0 F)
1951
-33.9 C (-29.0 F)
1952
-26.7 C (-16.1 F)
1953
-28.9 C (-20.0 F)
1954
-31.7 C (-25.1 F)
1955
-33.9 C (-29.0 F)
1956
-27.8 C (-18.0 F)
1957
-41.1 C (-42.0 F)
1958
-30.0 C (-22.0 F)
1959
-32.8 C (-27.0 F)
1960
-30.0 C (-22.0 F)
1961
-32.8 C (-27.0 F)
1962
-32.2 C (-26.0 F)
1963
-31.1 C (-24.0 F)
1964
-28.9 C (-20.0 F)
1965
-34.4 C (-29.9 F)
1966
-30.0 C (-22.0 F)
1967
-33.3 C (-27.9 F)
1968
-35.6 C (-32.1 F)
1969
-27.8 C (-18.0 F)
1970
-32.2 C (-26.0 F)
1971
-33.3 C (-27.9 F)
1972
-34.4 C (-29.9 F)
1973
-33.9 C (-29.0 F)
1974
-32.2 C (-26.0 F)
1975
-33.9 C (-29.0 F)
1976
-31.7 C (-25.1 F)
1977
-33.3 C (-27.9 F)
1978
-33.3 C (-27.9 F)
1979
-35.6 C (-32.1 F)
1980
-33.9 C (-29.0 F)
1981
-37.8 C (-36.0 F)
1982
-31.1 C (-24.0 F)
1983
-30.6 C (-23.1 F)
1984
-31.1 C (-24.0 F)
1985
-30.0 C (-22.0 F)
1986
-30.6 C (-23.1 F)
1987
-32.2 C (-26.0 F)
1988
-31.7 C (-25.1 F)
1989
-32.2 C (-26.0 F)
1990
-27.8 C (-18.0 F)
1991
-31.1 C (-24.0 F)
1992
-30.0 C (-22.0 F)
1993
-41.7 C (-43.1 F)
1994
-33.3 C (-27.9 F)
1995
-30.0 C (-22.0 F)
Wettest day (Rx1day)
The wettest day of the year at Chasm Falls, 1926 to 1995. The record is 107.2 mm (4.2 in) in 1990, marked on the chart; the median year is 46.0 mm (1.8 in).
Wettest day (Rx1day) at Chasm Falls by year
Year
Wettest day (Rx1day)
1926
35.6 mm (1.4 in)
1927
46.0 mm (1.8 in)
1928
27.4 mm (1.1 in)
1929
68.8 mm (2.7 in)
1930
42.7 mm (1.7 in)
1931
62.7 mm (2.5 in)
1932
64.5 mm (2.5 in)
1933
32.0 mm (1.3 in)
1934
44.5 mm (1.8 in)
1935
63.0 mm (2.5 in)
1936
50.8 mm (2.0 in)
1937
64.3 mm (2.5 in)
1938
75.4 mm (3.0 in)
1939
9.1 mm (0.36 in)
1941
22.6 mm (0.9 in)
1942
52.1 mm (2.1 in)
1943
33.8 mm (1.3 in)
1944
52.8 mm (2.1 in)
1945
46.2 mm (1.8 in)
1946
45.7 mm (1.8 in)
1947
59.9 mm (2.4 in)
1948
48.8 mm (1.9 in)
1949
41.9 mm (1.6 in)
1950
62.2 mm (2.4 in)
1951
35.6 mm (1.4 in)
1952
62.7 mm (2.5 in)
1953
37.1 mm (1.5 in)
1954
46.0 mm (1.8 in)
1955
39.1 mm (1.5 in)
1956
49.5 mm (1.9 in)
1957
59.4 mm (2.3 in)
1958
41.1 mm (1.6 in)
1959
38.4 mm (1.5 in)
1960
61.2 mm (2.4 in)
1961
42.7 mm (1.7 in)
1962
61.7 mm (2.4 in)
1963
41.1 mm (1.6 in)
1964
38.1 mm (1.5 in)
1965
53.6 mm (2.1 in)
1966
41.7 mm (1.6 in)
1967
33.0 mm (1.3 in)
1968
43.2 mm (1.7 in)
1969
34.3 mm (1.4 in)
1970
44.5 mm (1.8 in)
1971
62.2 mm (2.4 in)
1972
31.2 mm (1.2 in)
1973
71.6 mm (2.8 in)
1974
61.5 mm (2.4 in)
1975
39.9 mm (1.6 in)
1976
40.6 mm (1.6 in)
1977
55.9 mm (2.2 in)
1978
39.1 mm (1.5 in)
1979
83.8 mm (3.3 in)
1980
30.5 mm (1.2 in)
1981
70.1 mm (2.8 in)
1982
43.4 mm (1.7 in)
1983
57.2 mm (2.3 in)
1984
69.9 mm (2.8 in)
1985
48.3 mm (1.9 in)
1986
43.2 mm (1.7 in)
1987
39.4 mm (1.6 in)
1988
74.4 mm (2.9 in)
1989
50.8 mm (2.0 in)
1990
107.2 mm (4.2 in)
1991
44.2 mm (1.7 in)
1992
43.2 mm (1.7 in)
1993
51.1 mm (2.0 in)
1994
55.9 mm (2.2 in)
1995
30.5 mm (1.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Chasm Falls, 1926 to 1995. The record is 127.1 mm (5.0 in) in 1988, marked on the chart; the median year is 79.5 mm (3.1 in).
Wettest five days (Rx5day) at Chasm Falls by year
Year
Wettest five days (Rx5day)
1926
55.1 mm (2.2 in)
1927
85.8 mm (3.4 in)
1928
57.6 mm (2.3 in)
1929
80.7 mm (3.2 in)
1930
80.4 mm (3.2 in)
1931
77.9 mm (3.1 in)
1932
120.4 mm (4.7 in)
1933
59.7 mm (2.4 in)
1934
59.5 mm (2.3 in)
1935
90.2 mm (3.6 in)
1936
83.6 mm (3.3 in)
1937
108.8 mm (4.3 in)
1938
97.1 mm (3.8 in)
1939
18.8 mm (0.7 in)
1941
68.8 mm (2.7 in)
1942
86.6 mm (3.4 in)
1943
83.5 mm (3.3 in)
1944
77.7 mm (3.1 in)
1945
84.3 mm (3.3 in)
1946
110.0 mm (4.3 in)
1947
78.8 mm (3.1 in)
1948
81.4 mm (3.2 in)
1949
91.5 mm (3.6 in)
1950
78.2 mm (3.1 in)
1951
53.3 mm (2.1 in)
1952
92.9 mm (3.7 in)
1953
62.8 mm (2.5 in)
1954
79.3 mm (3.1 in)
1955
71.9 mm (2.8 in)
1956
63.5 mm (2.5 in)
1957
90.2 mm (3.6 in)
1958
66.3 mm (2.6 in)
1959
90.5 mm (3.6 in)
1960
72.1 mm (2.8 in)
1961
64.5 mm (2.5 in)
1962
67.3 mm (2.6 in)
1963
67.4 mm (2.7 in)
1964
49.3 mm (1.9 in)
1965
98.0 mm (3.9 in)
1966
43.8 mm (1.7 in)
1967
59.9 mm (2.4 in)
1968
49.8 mm (2.0 in)
1969
55.6 mm (2.2 in)
1970
79.3 mm (3.1 in)
1971
104.4 mm (4.1 in)
1972
81.3 mm (3.2 in)
1973
79.3 mm (3.1 in)
1974
96.0 mm (3.8 in)
1975
79.5 mm (3.1 in)
1976
59.7 mm (2.4 in)
1977
82.6 mm (3.3 in)
1978
59.6 mm (2.3 in)
1979
92.4 mm (3.6 in)
1980
49.8 mm (2.0 in)
1981
107.7 mm (4.2 in)
1982
74.4 mm (2.9 in)
1983
90.8 mm (3.6 in)
1984
96.8 mm (3.8 in)
1985
109.2 mm (4.3 in)
1986
96.5 mm (3.8 in)
1987
61.0 mm (2.4 in)
1988
127.1 mm (5.0 in)
1989
86.1 mm (3.4 in)
1990
125.3 mm (4.9 in)
1991
79.8 mm (3.1 in)
1992
80.3 mm (3.2 in)
1993
67.6 mm (2.7 in)
1994
92.2 mm (3.6 in)
1995
41.9 mm (1.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Chasm Falls, 1926 to 1995. The record is 23 days in 1965, marked on the chart; the median year is 13 days.
Longest dry spell (CDD) at Chasm Falls by year
Year
Longest dry spell (CDD)
1926
6 days
1927
14 days
1928
11 days
1929
16 days
1930
15 days
1931
15 days
1932
9 days
1933
14 days
1934
9 days
1935
13 days
1936
9 days
1937
13 days
1938
13 days
1939
10 days
1941
17 days
1942
13 days
1943
12 days
1944
16 days
1945
16 days
1946
10 days
1947
16 days
1948
16 days
1949
10 days
1950
15 days
1951
13 days
1952
12 days
1953
15 days
1954
13 days
1955
9 days
1956
17 days
1957
21 days
1958
8 days
1959
16 days
1960
10 days
1961
12 days
1962
12 days
1963
20 days
1964
16 days
1965
23 days
1966
11 days
1967
17 days
1968
19 days
1969
13 days
1970
14 days
1971
11 days
1972
12 days
1973
9 days
1974
9 days
1975
15 days
1976
12 days
1977
14 days
1978
10 days
1979
12 days
1980
12 days
1981
8 days
1982
11 days
1983
14 days
1984
10 days
1985
14 days
1986
18 days
1987
15 days
1988
19 days
1989
17 days
1990
13 days
1991
11 days
1992
23 days
1993
11 days
1994
12 days
1995
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
52 years with a frost
Across 52 years with a frost, the median last spring frost at Chasm Falls falls on 22 May and the median first autumn frost on 17 September, which leaves a median of 114 days between them.
Fitted over all years, the growing season changes by +1.8 days per decade at this station.
Frost dates and growing season at Chasm Falls
Measure
Median, all years
Earliest period
Recent period (1957 to 1994)
Recent against earliest
Fitted trend
Last spring frost
22 May
n/a
25 May
n/a
-0.3 days per decade
First autumn frost
17 September
n/a
20 September
n/a
+1.4 days per decade
Growing days
114 days
n/a
115 days
n/a
+1.8 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
62 years, 1927 to 1994
A day with at least 48.4 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 95.6 mm (3.8 in) of rain is expected about once in 100 years.
Rainfall return levels at Chasm Falls: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
48.4 mm (1.9 in)
5 years
61.2 mm (2.4 in)
10 years
69.7 mm (2.7 in)
25 years
80.2 mm (3.2 in)
50 years
88.0 mm (3.5 in)
100 years
95.6 mm (3.8 in)
Longer than the 62 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, 62 years of values from 1927 to 1994.
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: 107.2 mm (4.2 in) in 1990; 83.8 mm (3.3 in) in 1979; 74.4 mm (2.9 in) in 1988.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of Chasm Falls, at 1949 and 1965. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1949 ran 0.6 C (1.1 F) higher than in the years before (possible change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1965 ran 0.5 C (0.8 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Chasm Falls, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1949
+0.6
+1.1
possible
5
1965
-0.5
-0.8
likely
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 Chasm Falls standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Chasm Falls 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.