Record envelope, standing records and threshold days for Dobbs Ferry-Ardsley (USC00302129), New York, United States, with 68 years of record.
Key Facts for Dobbs Ferry-Ardsley
Dobbs Ferry-Ardsley (USC00302129) is a weather station in New York, United States at 41.01 latitude and -73.83 longitude, 61 m (200 ft) above sea level.
The station reports from 1945 to 2012, 68 years of record.
1,464 records set at Dobbs Ferry-Ardsley still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Dobbs Ferry-Ardsley tied a daily record high maximum temperature of 35.0 C (95.0 F) on 29 June 2012.
About the Station
Location: New York, United States, 41.01 latitude, -73.83 longitude.
Elevation: 61 m (200 ft).
Period of record: 1945 to 2012, 68 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 Dobbs Ferry-Ardsley. 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 Dobbs Ferry-Ardsley, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
22.8 C (73.0 F)
-23.3 C (-9.9 F)
n/a
n/a
Feb
23.9 C (75.0 F)
-20.6 C (-5.1 F)
n/a
n/a
Mar
30.0 C (86.0 F)
-16.7 C (1.9 F)
n/a
n/a
Apr
35.6 C (96.1 F)
-8.3 C (17.1 F)
n/a
n/a
May
36.1 C (97.0 F)
-1.7 C (28.9 F)
n/a
n/a
Jun
37.2 C (99.0 F)
3.3 C (37.9 F)
n/a
n/a
Jul
40.0 C (104.0 F)
7.2 C (45.0 F)
n/a
n/a
Aug
38.9 C (102.0 F)
6.7 C (44.1 F)
n/a
n/a
Sep
38.3 C (100.9 F)
0.6 C (33.1 F)
n/a
n/a
Oct
31.7 C (89.1 F)
-2.8 C (27.0 F)
n/a
n/a
Nov
27.8 C (82.0 F)
-11.1 C (12.0 F)
n/a
n/a
Dec
25.0 C (77.0 F)
-20.0 C (-4.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Dobbs Ferry-Ardsley still stand. 1990 holds the most, with 40.
Standing records at Dobbs Ferry-Ardsley by the year they were set
Year set
Standing records
1945
4
1946
30
1947
28
1948
34
1949
34
1950
30
1951
21
1952
15
1953
26
1954
20
1955
29
1956
32
1957
15
1958
17
1959
28
1960
14
1961
20
1962
28
1963
18
1964
19
1965
22
1966
16
1967
24
1968
25
1969
11
1970
11
1971
16
1972
19
1973
13
1974
23
1975
19
1976
30
1977
19
1978
11
1979
39
1980
26
1981
18
1982
26
1983
23
1984
23
1985
21
1986
22
1987
24
1988
25
1989
22
1990
40
1991
27
1992
26
1993
31
1994
26
1995
22
1996
28
1997
20
1998
14
1999
17
2000
28
2001
20
2002
33
2003
13
2004
9
2005
21
2006
19
2007
20
2008
12
2009
14
2010
15
2011
7
2012
12
All-Time Record Progression
7 new records
7 all-time records were set at Dobbs Ferry-Ardsley between 21 July 1977 and 13 August 2002. Each dot is a new record.
When Dobbs Ferry-Ardsley set new all-time records
Date
Kind
Detail
1977-07-21
Record high maximum temperature
Record high maximum temperature 39.4 C (102.9 F)
1980-07-21
Record high maximum temperature
Record high maximum temperature 40.0 C (104.0 F)
1980-07-21
Record high minimum temperature
Record high minimum temperature 26.7 C (80.1 F)
1985-01-21
Record low maximum temperature
Record low maximum temperature -12.8 C (9.0 F)
1994-01-27
Record low minimum temperature
Record low minimum temperature -23.3 C (-9.9 F)
1999-09-16
Record daily precipitation
Record daily precipitation 193.5 mm (7.6 in)
2002-08-13
Record high minimum temperature
Record high minimum temperature 27.2 C (81.0 F)
Wettest Day of Each Month
Sep: 193.5 mm (7.6 in)
The wettest day on record for each calendar month at Dobbs Ferry-Ardsley. The most was 193.5 mm (7.6 in) on 16 September 1999.
Record daily precipitation for each month at Dobbs Ferry-Ardsley
Month
Record daily precipitation (mm)
Date
Jan
95.3 mm (3.8 in)
21 January 1979
Feb
81.3 mm (3.2 in)
2 February 1973
Mar
108.7 mm (4.3 in)
13 March 1953
Apr
135.6 mm (5.3 in)
5 April 1984
May
138.2 mm (5.4 in)
29 May 1968
Jun
144.5 mm (5.7 in)
19 June 1972
Jul
83.3 mm (3.3 in)
23 July 1946
Aug
121.2 mm (4.8 in)
13 August 1955
Sep
193.5 mm (7.6 in)
16 September 1999
Oct
109.5 mm (4.3 in)
15 October 1955
Nov
133.4 mm (5.3 in)
8 November 1977
Dec
81.5 mm (3.2 in)
21 December 1973
Period of Record Coverage
1945 to 2012
Complete yearUnder 90 percent of days
68 years of record at Dobbs Ferry-Ardsley, 1945 to 2012. 5 years have data for under 90 percent of days and are left out of rankings: 1945, 1997, 2003, 2011, 2012.
Cooler than the station meanWarmer than the station mean
One stripe for each of 61 complete years at Dobbs Ferry-Ardsley, 1946 to 2009. Blue stripes are years cooler than the station's own mean of 11.7 C (53.0 F); red stripes are warmer. The coolest year was 1992, at 10.6 C (51.1 F), and the warmest was 1949, at 12.8 C (55.0 F). The strongest colour marks a difference of 1.2 C (2.2 F).
Annual mean temperature at Dobbs Ferry-Ardsley as warming stripes, 1946 to 2009
Year
Annual mean temperature
Difference from the station mean
1946
11.6 C
-0.06 C
1947
10.7 C
-0.98 C
1948
10.7 C
-1.02 C
1949
12.8 C
+1.11 C
1950
11.1 C
-0.56 C
1951
11.7 C
-0.02 C
1952
12.0 C
+0.27 C
1953
12.7 C
+1.04 C
1954
12.0 C
+0.31 C
1955
11.9 C
+0.21 C
1956
11.3 C
-0.40 C
1957
12.1 C
+0.42 C
1958
10.7 C
-0.99 C
1959
12.1 C
+0.37 C
1960
11.3 C
-0.41 C
1961
11.5 C
-0.19 C
1962
10.8 C
-0.90 C
1963
11.1 C
-0.54 C
1964
11.8 C
+0.15 C
1965
11.4 C
-0.26 C
1966
11.5 C
-0.23 C
1967
11.0 C
-0.68 C
1968
11.4 C
-0.29 C
1969
11.5 C
-0.14 C
1970
11.6 C
-0.07 C
1971
11.9 C
+0.23 C
1972
11.3 C
-0.38 C
1973
12.7 C
+1.03 C
1974
12.0 C
+0.35 C
1975
12.3 C
+0.62 C
1976
11.5 C
-0.22 C
1977
11.8 C
+0.15 C
1978
10.9 C
-0.74 C
1979
11.7 C
+0.03 C
1980
11.9 C
+0.17 C
1981
11.9 C
+0.20 C
1982
11.7 C
+0.04 C
1983
12.4 C
+0.74 C
1984
12.2 C
+0.55 C
1985
12.0 C
+0.34 C
1986
11.9 C
+0.20 C
1987
12.0 C
+0.36 C
1988
11.8 C
+0.13 C
1989
11.3 C
-0.35 C
1990
12.3 C
+0.65 C
1991
12.4 C
+0.68 C
1992
10.6 C
-1.08 C
1993
11.0 C
-0.67 C
1994
11.1 C
-0.61 C
1995
11.3 C
-0.43 C
1996
10.8 C
-0.90 C
1998
12.6 C
+0.93 C
1999
12.1 C
+0.46 C
2000
11.1 C
-0.61 C
2001
12.0 C
+0.28 C
2002
12.5 C
+0.78 C
2004
11.5 C
-0.14 C
2006
12.7 C
+1.02 C
2007
11.8 C
+0.09 C
2008
11.9 C
+0.24 C
2009
11.4 C
-0.29 C
The fitted trend in annual mean temperature here over 1946 to 2009 is 0.05 C (-0.03 to 0.13) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.2) per decade. The slope is a straight line fitted to 61 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Dobbs Ferry-Ardsley
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.05 C (-0.03 to 0.13) per decade
0.1 F (-0.1 to 0.2) per decade
1946 to 2009
61
Not clearly different from zero
Mean daily maximum
0.2 C (0.1 to 0.3) per decade
0.4 F (0.2 to 0.5) per decade
1946 to 2009
61
Rise
Mean daily minimum
-0.10 C (-0.19 to -0.01) per decade
-0.19 F (-0.35 to -0.03) per decade
1946 to 2009
61
Fall
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
1945 to 2012
Yearly extremes at Dobbs Ferry-Ardsley: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.0 C (104.0 F)
1980
35.6 C (96.1 F)
68
Coldest night (TNn)
-23.3 C (-9.9 F)
1994
-16.7 C (1.9 F)
68
Wettest day (Rx1day)
193.5 mm (7.6 in)
1999
75.3 mm (3.0 in)
68
Wettest five days (Rx5day)
263.9 mm (10.4 in)
1975
119.6 mm (4.7 in)
68
Longest dry spell (CDD)
37 days
1964
17 days
68
Hottest day (TXx)
The hottest day of the year at Dobbs Ferry-Ardsley, 1945 to 2012. The record is 40.0 C (104.0 F) in 1980, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Dobbs Ferry-Ardsley by year
Year
Hottest day (TXx)
1945
25.6 C (78.1 F)
1946
33.9 C (93.0 F)
1947
34.4 C (93.9 F)
1948
38.9 C (102.0 F)
1949
37.8 C (100.0 F)
1950
33.3 C (91.9 F)
1951
32.8 C (91.0 F)
1952
37.2 C (99.0 F)
1953
38.3 C (100.9 F)
1954
38.9 C (102.0 F)
1955
38.3 C (100.9 F)
1956
35.6 C (96.1 F)
1957
38.3 C (100.9 F)
1958
33.9 C (93.0 F)
1959
35.0 C (95.0 F)
1960
32.2 C (90.0 F)
1961
33.9 C (93.0 F)
1962
35.6 C (96.1 F)
1963
35.0 C (95.0 F)
1964
35.6 C (96.1 F)
1965
33.9 C (93.0 F)
1966
38.3 C (100.9 F)
1967
33.3 C (91.9 F)
1968
36.1 C (97.0 F)
1969
35.6 C (96.1 F)
1970
33.9 C (93.0 F)
1971
35.6 C (96.1 F)
1972
35.0 C (95.0 F)
1973
36.1 C (97.0 F)
1974
36.7 C (98.1 F)
1975
36.1 C (97.0 F)
1976
35.6 C (96.1 F)
1977
39.4 C (102.9 F)
1978
36.1 C (97.0 F)
1979
35.6 C (96.1 F)
1980
40.0 C (104.0 F)
1981
36.1 C (97.0 F)
1982
37.8 C (100.0 F)
1983
36.7 C (98.1 F)
1984
36.1 C (97.0 F)
1985
35.0 C (95.0 F)
1986
35.0 C (95.0 F)
1987
35.6 C (96.1 F)
1988
36.1 C (97.0 F)
1989
33.9 C (93.0 F)
1990
33.3 C (91.9 F)
1991
36.7 C (98.1 F)
1992
33.3 C (91.9 F)
1993
36.7 C (98.1 F)
1994
34.4 C (93.9 F)
1995
38.9 C (102.0 F)
1996
36.1 C (97.0 F)
1997
33.9 C (93.0 F)
1998
34.4 C (93.9 F)
1999
37.8 C (100.0 F)
2000
34.4 C (93.9 F)
2001
35.0 C (95.0 F)
2002
36.7 C (98.1 F)
2003
34.4 C (93.9 F)
2004
34.4 C (93.9 F)
2005
37.2 C (99.0 F)
2006
37.8 C (100.0 F)
2007
35.0 C (95.0 F)
2008
36.7 C (98.1 F)
2009
34.4 C (93.9 F)
2010
38.9 C (102.0 F)
2011
37.8 C (100.0 F)
2012
35.6 C (96.1 F)
Coldest night (TNn)
The coldest night of the year at Dobbs Ferry-Ardsley, 1945 to 2012. The record is -23.3 C (-9.9 F) in 1994, marked on the chart; the median year is -16.7 C (1.9 F).
Coldest night (TNn) at Dobbs Ferry-Ardsley by year
Year
Coldest night (TNn)
1945
-13.3 C (8.1 F)
1946
-16.7 C (1.9 F)
1947
-15.0 C (5.0 F)
1948
-19.4 C (-2.9 F)
1949
-12.2 C (10.0 F)
1950
-16.1 C (3.0 F)
1951
-15.0 C (5.0 F)
1952
-16.1 C (3.0 F)
1953
-11.1 C (12.0 F)
1954
-16.7 C (1.9 F)
1955
-18.3 C (-0.9 F)
1956
-13.3 C (8.1 F)
1957
-20.0 C (-4.0 F)
1958
-17.8 C (0.0 F)
1959
-14.4 C (6.1 F)
1960
-13.9 C (7.0 F)
1961
-20.6 C (-5.1 F)
1962
-18.3 C (-0.9 F)
1963
-20.6 C (-5.1 F)
1964
-13.9 C (7.0 F)
1965
-17.2 C (1.0 F)
1966
-15.0 C (5.0 F)
1967
-17.8 C (0.0 F)
1968
-20.0 C (-4.0 F)
1969
-14.4 C (6.1 F)
1970
-16.7 C (1.9 F)
1971
-16.1 C (3.0 F)
1972
-15.6 C (3.9 F)
1973
-15.6 C (3.9 F)
1974
-16.7 C (1.9 F)
1975
-13.9 C (7.0 F)
1976
-18.9 C (-2.0 F)
1977
-18.9 C (-2.0 F)
1978
-16.7 C (1.9 F)
1979
-19.4 C (-2.9 F)
1980
-20.0 C (-4.0 F)
1981
-18.9 C (-2.0 F)
1982
-20.6 C (-5.1 F)
1983
-17.2 C (1.0 F)
1984
-18.3 C (-0.9 F)
1985
-20.6 C (-5.1 F)
1986
-15.6 C (3.9 F)
1987
-16.7 C (1.9 F)
1988
-17.8 C (0.0 F)
1989
-16.1 C (3.0 F)
1990
-14.4 C (6.1 F)
1991
-15.0 C (5.0 F)
1992
-13.3 C (8.1 F)
1993
-17.8 C (0.0 F)
1994
-23.3 C (-9.9 F)
1995
-15.6 C (3.9 F)
1996
-18.9 C (-2.0 F)
1997
-16.7 C (1.9 F)
1998
-10.6 C (12.9 F)
1999
-13.9 C (7.0 F)
2000
-16.7 C (1.9 F)
2001
-15.6 C (3.9 F)
2002
-11.1 C (12.0 F)
2003
-16.7 C (1.9 F)
2004
-18.3 C (-0.9 F)
2005
-19.4 C (-2.9 F)
2006
-12.2 C (10.0 F)
2007
-13.9 C (7.0 F)
2008
-12.2 C (10.0 F)
2009
-17.8 C (0.0 F)
2010
-12.2 C (10.0 F)
2011
-17.8 C (0.0 F)
2012
-13.3 C (8.1 F)
Wettest day (Rx1day)
The wettest day of the year at Dobbs Ferry-Ardsley, 1945 to 2012. The record is 193.5 mm (7.6 in) in 1999, marked on the chart; the median year is 75.3 mm (3.0 in).
Wettest day (Rx1day) at Dobbs Ferry-Ardsley by year
Year
Wettest day (Rx1day)
1945
41.9 mm (1.6 in)
1946
97.8 mm (3.9 in)
1947
71.9 mm (2.8 in)
1948
52.1 mm (2.1 in)
1949
38.1 mm (1.5 in)
1950
64.5 mm (2.5 in)
1951
82.6 mm (3.3 in)
1952
94.2 mm (3.7 in)
1953
108.7 mm (4.3 in)
1954
122.9 mm (4.8 in)
1955
121.2 mm (4.8 in)
1956
46.2 mm (1.8 in)
1957
49.3 mm (1.9 in)
1958
52.8 mm (2.1 in)
1959
54.1 mm (2.1 in)
1960
99.1 mm (3.9 in)
1961
51.1 mm (2.0 in)
1962
71.1 mm (2.8 in)
1963
75.2 mm (3.0 in)
1964
47.8 mm (1.9 in)
1965
63.5 mm (2.5 in)
1966
62.0 mm (2.4 in)
1967
56.1 mm (2.2 in)
1968
138.2 mm (5.4 in)
1969
84.8 mm (3.3 in)
1970
68.8 mm (2.7 in)
1971
80.5 mm (3.2 in)
1972
144.5 mm (5.7 in)
1973
81.5 mm (3.2 in)
1974
80.0 mm (3.1 in)
1975
110.7 mm (4.4 in)
1976
88.4 mm (3.5 in)
1977
133.4 mm (5.3 in)
1978
69.3 mm (2.7 in)
1979
95.3 mm (3.8 in)
1980
77.5 mm (3.1 in)
1981
72.4 mm (2.9 in)
1982
71.1 mm (2.8 in)
1983
78.0 mm (3.1 in)
1984
135.6 mm (5.3 in)
1985
88.9 mm (3.5 in)
1986
68.8 mm (2.7 in)
1987
83.6 mm (3.3 in)
1988
66.3 mm (2.6 in)
1989
71.6 mm (2.8 in)
1990
83.8 mm (3.3 in)
1991
82.3 mm (3.2 in)
1992
71.1 mm (2.8 in)
1993
55.6 mm (2.2 in)
1994
57.2 mm (2.3 in)
1995
74.2 mm (2.9 in)
1996
77.7 mm (3.1 in)
1997
62.2 mm (2.4 in)
1998
53.3 mm (2.1 in)
1999
193.5 mm (7.6 in)
2000
55.9 mm (2.2 in)
2001
114.0 mm (4.5 in)
2002
71.6 mm (2.8 in)
2003
49.0 mm (1.9 in)
2004
102.9 mm (4.1 in)
2005
83.1 mm (3.3 in)
2006
82.6 mm (3.3 in)
2007
131.6 mm (5.2 in)
2008
75.4 mm (3.0 in)
2009
64.0 mm (2.5 in)
2010
79.2 mm (3.1 in)
2011
77.0 mm (3.0 in)
2012
49.3 mm (1.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Dobbs Ferry-Ardsley, 1945 to 2012. The record is 263.9 mm (10.4 in) in 1975, marked on the chart; the median year is 119.6 mm (4.7 in).
Wettest five days (Rx5day) at Dobbs Ferry-Ardsley by year
Year
Wettest five days (Rx5day)
1945
80.0 mm (3.1 in)
1946
172.7 mm (6.8 in)
1947
134.4 mm (5.3 in)
1948
102.7 mm (4.0 in)
1949
110.6 mm (4.4 in)
1950
85.4 mm (3.4 in)
1951
137.9 mm (5.4 in)
1952
116.8 mm (4.6 in)
1953
151.1 mm (5.9 in)
1954
140.2 mm (5.5 in)
1955
221.3 mm (8.7 in)
1956
110.5 mm (4.4 in)
1957
104.0 mm (4.1 in)
1958
126.5 mm (5.0 in)
1959
93.2 mm (3.7 in)
1960
129.1 mm (5.1 in)
1961
74.7 mm (2.9 in)
1962
104.6 mm (4.1 in)
1963
108.8 mm (4.3 in)
1964
93.8 mm (3.7 in)
1965
82.3 mm (3.2 in)
1966
118.6 mm (4.7 in)
1967
95.7 mm (3.8 in)
1968
164.6 mm (6.5 in)
1969
99.0 mm (3.9 in)
1970
97.5 mm (3.8 in)
1971
157.0 mm (6.2 in)
1972
210.6 mm (8.3 in)
1973
121.8 mm (4.8 in)
1974
148.6 mm (5.9 in)
1975
263.9 mm (10.4 in)
1976
125.5 mm (4.9 in)
1977
167.2 mm (6.6 in)
1978
85.4 mm (3.4 in)
1979
167.9 mm (6.6 in)
1980
121.7 mm (4.8 in)
1981
111.1 mm (4.4 in)
1982
93.2 mm (3.7 in)
1983
144.8 mm (5.7 in)
1984
173.0 mm (6.8 in)
1985
99.9 mm (3.9 in)
1986
96.3 mm (3.8 in)
1987
153.7 mm (6.1 in)
1988
108.7 mm (4.3 in)
1989
136.6 mm (5.4 in)
1990
151.3 mm (6.0 in)
1991
115.8 mm (4.6 in)
1992
94.3 mm (3.7 in)
1993
72.4 mm (2.9 in)
1994
66.1 mm (2.6 in)
1995
85.4 mm (3.4 in)
1996
147.8 mm (5.8 in)
1997
79.8 mm (3.1 in)
1998
101.6 mm (4.0 in)
1999
220.7 mm (8.7 in)
2000
132.9 mm (5.2 in)
2001
122.6 mm (4.8 in)
2002
120.6 mm (4.7 in)
2003
97.8 mm (3.9 in)
2004
121.7 mm (4.8 in)
2005
213.1 mm (8.4 in)
2006
109.2 mm (4.3 in)
2007
233.0 mm (9.2 in)
2008
138.7 mm (5.5 in)
2009
103.9 mm (4.1 in)
2010
128.8 mm (5.1 in)
2011
143.8 mm (5.7 in)
2012
69.6 mm (2.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Dobbs Ferry-Ardsley, 1945 to 2012. The record is 37 days in 1964, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Dobbs Ferry-Ardsley by year
Year
Longest dry spell (CDD)
1945
8 days
1946
18 days
1947
23 days
1948
18 days
1949
18 days
1950
17 days
1951
13 days
1952
16 days
1953
26 days
1954
11 days
1955
14 days
1956
15 days
1957
22 days
1958
20 days
1959
17 days
1960
12 days
1961
15 days
1962
15 days
1963
28 days
1964
37 days
1965
21 days
1966
26 days
1967
15 days
1968
25 days
1969
13 days
1970
16 days
1971
18 days
1972
9 days
1973
25 days
1974
16 days
1975
15 days
1976
20 days
1977
19 days
1978
19 days
1979
15 days
1980
24 days
1981
16 days
1982
16 days
1983
16 days
1984
17 days
1985
21 days
1986
17 days
1987
16 days
1988
20 days
1989
17 days
1990
12 days
1991
23 days
1992
15 days
1993
11 days
1994
15 days
1995
25 days
1996
13 days
1997
14 days
1998
17 days
1999
20 days
2000
11 days
2001
30 days
2002
13 days
2003
9 days
2004
25 days
2005
18 days
2006
17 days
2007
19 days
2008
15 days
2009
12 days
2010
18 days
2011
13 days
2012
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
61 years with a frost
Across 61 years with a frost, the median last spring frost at Dobbs Ferry-Ardsley falls on 13 April and the median first autumn frost on 29 October, which leaves a median of 197 days between them.
In 1977 to 2009 the median growing season was 188 days. That is 16 days fewer than in 1946 to 1975.
Fitted over all years, the growing season changes by -5.9 days per decade at this station.
Frost dates and growing season at Dobbs Ferry-Ardsley
Measure
Median, all years
Earliest period (1946 to 1975)
Recent period (1977 to 2009)
Recent against earliest
Fitted trend
Last spring frost
13 April
12 April
17 April
5 days later
+2.9 days per decade
First autumn frost
29 October
5 November
24 October
12 days earlier
-3.0 days per decade
Growing days
197 days
204 days
188 days
16 days fewer
-5.9 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
63 years, 1946 to 2010
A day with at least 76.0 mm (3.0 in) of rain is expected about once in 2 years. A day with at least 183.8 mm (7.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Dobbs Ferry-Ardsley: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
76.0 mm (3.0 in)
5 years
100.4 mm (4.0 in)
10 years
118.2 mm (4.7 in)
25 years
142.8 mm (5.6 in)
50 years
162.6 mm (6.4 in)
100 years
183.8 mm (7.2 in)
Longer than the 63 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, 63 years of values from 1946 to 2010.
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: 193.5 mm (7.6 in) in 1999; 144.5 mm (5.7 in) in 1972; 138.2 mm (5.4 in) in 1968.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of Dobbs Ferry-Ardsley, at 1951 and 1974. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1951 ran 0.4 C (0.7 F) higher than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1974 ran 0.2 C (0.3 F) higher than in the years before (possible change).
Suspected changes in the annual mean temperature at Dobbs Ferry-Ardsley, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1951
+0.4
+0.7
likely
5
1974
+0.2
+0.3
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 Dobbs Ferry-Ardsley standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Dobbs Ferry-Ardsley 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.