Record envelope, standing records and threshold days for Lake Cochituate (USC00194012), Massachusetts, United States, with 76 years of record.
Key Facts for Lake Cochituate
Lake Cochituate (USC00194012) is a weather station in Massachusetts, United States at 42.32 latitude and -71.38 longitude, 46 m (151 ft) above sea level.
The station reports from 1885 to 1960, 76 years of record.
1,464 records set at Lake Cochituate still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Lake Cochituate tied a daily record low maximum temperature of 15.0 C (59.0 F) on 20 September 1960.
About the Station
Location: Massachusetts, United States, 42.32 latitude, -71.38 longitude.
Elevation: 46 m (151 ft).
Period of record: 1885 to 1960, 76 years.
Eligible elements: tmax, tmin, prcp.
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 Lake Cochituate. 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 Lake Cochituate, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
21.1 C (70.0 F)
-33.3 C (-27.9 F)
n/a
n/a
Feb
21.1 C (70.0 F)
-33.3 C (-27.9 F)
n/a
n/a
Mar
29.4 C (84.9 F)
-26.1 C (-15.0 F)
n/a
n/a
Apr
33.3 C (91.9 F)
-13.9 C (7.0 F)
n/a
n/a
May
38.3 C (100.9 F)
-6.1 C (21.0 F)
n/a
n/a
Jun
40.0 C (104.0 F)
-1.1 C (30.0 F)
n/a
n/a
Jul
40.6 C (105.1 F)
3.3 C (37.9 F)
n/a
n/a
Aug
38.9 C (102.0 F)
0.6 C (33.1 F)
n/a
n/a
Sep
39.4 C (102.9 F)
-5.6 C (21.9 F)
n/a
n/a
Oct
33.3 C (91.9 F)
-10.6 C (12.9 F)
n/a
n/a
Nov
27.8 C (82.0 F)
-20.0 C (-4.0 F)
n/a
n/a
Dec
20.6 C (69.1 F)
-31.7 C (-25.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Lake Cochituate still stand. 1894 holds the most, with 40.
Standing records at Lake Cochituate by the year they were set
Year set
Standing records
1885
31
1888
23
1891
4
1893
22
1894
40
1895
35
1896
29
1897
19
1898
31
1899
24
1900
24
1901
16
1902
15
1903
30
1904
21
1905
17
1906
19
1907
21
1908
12
1909
19
1910
17
1911
27
1912
23
1913
23
1914
24
1915
24
1916
30
1917
21
1918
24
1919
23
1920
32
1921
28
1922
16
1923
30
1924
16
1925
25
1926
20
1927
17
1928
12
1929
20
1930
23
1931
19
1932
19
1933
23
1934
22
1935
16
1936
18
1937
22
1938
19
1939
10
1940
27
1941
9
1942
15
1943
21
1944
13
1945
25
1946
19
1947
16
1948
26
1949
19
1950
25
1951
14
1952
11
1953
14
1954
21
1955
15
1956
17
1957
26
1958
11
1959
21
1960
4
All-Time Record Progression
1 new records
1 all-time records were set at Lake Cochituate between 28 January 1935 and 28 January 1935. Each dot is a new record.
When Lake Cochituate set new all-time records
Date
Kind
Detail
1935-01-28
Record low minimum temperature
Record low minimum temperature -33.3 C (-27.9 F)
Wettest Day of Each Month
Oct: 176.5 mm (6.9 in)
The wettest day on record for each calendar month at Lake Cochituate. The most was 176.5 mm (6.9 in) on 14 October 1895.
Record daily precipitation for each month at Lake Cochituate
Month
Record daily precipitation (mm)
Date
Jan
66.8 mm (2.6 in)
9 January 1935
Feb
125.7 mm (4.9 in)
13 February 1886
Mar
96.5 mm (3.8 in)
2 March 1947
Apr
114.0 mm (4.5 in)
29 April 1904
May
87.4 mm (3.4 in)
29 May 1906
Jun
135.4 mm (5.3 in)
21 June 1922
Jul
107.4 mm (4.2 in)
24 July 1938
Aug
137.2 mm (5.4 in)
19 August 1955
Sep
175.3 mm (6.9 in)
12 September 1954
Oct
176.5 mm (6.9 in)
14 October 1895
Nov
98.6 mm (3.9 in)
12 November 1947
Dec
101.6 mm (4.0 in)
18 December 1888
Period of Record Coverage
1885 to 1960
Complete yearUnder 90 percent of days
71 years of record at Lake Cochituate, 1885 to 1960. 8 years have data for under 90 percent of days and are left out of rankings: 1888, 1891, 1896, 1912, 1928, 1929, 1946, 1960.
Cooler than the station meanWarmer than the station mean
One stripe for each of 55 complete years at Lake Cochituate, 1885 to 1959. Blue stripes are years cooler than the station's own mean of 9.1 C (48.5 F); red stripes are warmer. The coolest year was 1904, at 7.1 C (44.9 F), and the warmest was 1953, at 10.6 C (51.1 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Lake Cochituate as warming stripes, 1885 to 1959
Year
Annual mean temperature
Difference from the station mean
1885
7.9 C
-1.27 C
1894
8.7 C
-0.42 C
1897
9.4 C
+0.27 C
1898
9.8 C
+0.67 C
1899
9.5 C
+0.32 C
1900
9.9 C
+0.72 C
1902
9.1 C
-0.08 C
1903
8.6 C
-0.57 C
1904
7.1 C
-2.00 C
1905
8.0 C
-1.10 C
1906
9.1 C
-0.02 C
1907
8.4 C
-0.71 C
1908
9.9 C
+0.79 C
1909
9.3 C
+0.17 C
1910
9.4 C
+0.26 C
1911
9.6 C
+0.47 C
1913
10.1 C
+0.93 C
1915
9.5 C
+0.39 C
1916
8.8 C
-0.31 C
1917
8.0 C
-1.18 C
1918
9.1 C
-0.04 C
1920
8.9 C
-0.23 C
1921
10.1 C
+0.97 C
1922
9.5 C
+0.37 C
1924
8.7 C
-0.40 C
1925
9.6 C
+0.41 C
1926
7.9 C
-1.23 C
1927
9.5 C
+0.34 C
1930
9.7 C
+0.52 C
1931
10.2 C
+1.02 C
1932
9.6 C
+0.49 C
1933
9.4 C
+0.25 C
1934
8.7 C
-0.41 C
1935
8.2 C
-0.90 C
1936
8.6 C
-0.50 C
1937
9.9 C
+0.75 C
1938
9.8 C
+0.68 C
1939
9.0 C
-0.14 C
1940
7.5 C
-1.65 C
1941
8.9 C
-0.28 C
1942
8.9 C
-0.23 C
1943
8.6 C
-0.50 C
1944
9.1 C
-0.08 C
1945
9.0 C
-0.18 C
1947
8.9 C
-0.27 C
1950
8.8 C
-0.37 C
1951
9.4 C
+0.29 C
1952
9.7 C
+0.53 C
1953
10.6 C
+1.47 C
1954
9.6 C
+0.45 C
1955
9.6 C
+0.46 C
1956
8.7 C
-0.48 C
1957
10.0 C
+0.90 C
1958
8.9 C
-0.26 C
1959
10.2 C
+1.10 C
The fitted trend in annual mean temperature here over 1885 to 1959 is 0.07 C (-0.03 to 0.17) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.13 F (-0.05 to 0.30) per decade. The slope is a straight line fitted to 55 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Lake Cochituate
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.07 C (-0.03 to 0.17) per decade
0.13 F (-0.05 to 0.30) per decade
1885 to 1959
55
Not clearly different from zero
Mean daily maximum
-0.07 C (-0.18 to 0.04) per decade
-0.1 F (-0.3 to 0.1) per decade
1885 to 1959
55
Not clearly different from zero
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.4 F (0.2 to 0.6) per decade
1885 to 1959
55
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
1885 to 1960
Yearly extremes at Lake Cochituate: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.6 C (105.1 F)
1911
36.1 C (97.0 F)
71
Coldest night (TNn)
-33.3 C (-27.9 F)
1935
-26.1 C (-15.0 F)
71
Wettest day (Rx1day)
176.5 mm (6.9 in)
1895
72.0 mm (2.8 in)
76
Wettest five days (Rx5day)
265.3 mm (10.4 in)
1938
90.0 mm (3.5 in)
76
Longest dry spell (CDD)
36 days
1915
16 days
76
Hottest day (TXx)
The hottest day of the year at Lake Cochituate, 1885 to 1960. The record is 40.6 C (105.1 F) in 1911, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Lake Cochituate by year
Year
Hottest day (TXx)
1885
35.6 C (96.1 F)
1886
n/a
1887
n/a
1888
36.1 C (97.0 F)
1889
n/a
1890
n/a
1891
31.7 C (89.1 F)
1892
n/a
1893
35.0 C (95.0 F)
1894
37.2 C (99.0 F)
1895
36.1 C (97.0 F)
1896
36.1 C (97.0 F)
1897
36.1 C (97.0 F)
1898
38.3 C (100.9 F)
1899
35.6 C (96.1 F)
1900
37.2 C (99.0 F)
1901
40.0 C (104.0 F)
1902
33.9 C (93.0 F)
1903
36.1 C (97.0 F)
1904
35.0 C (95.0 F)
1905
35.0 C (95.0 F)
1906
34.4 C (93.9 F)
1907
37.2 C (99.0 F)
1908
37.2 C (99.0 F)
1909
35.6 C (96.1 F)
1910
36.1 C (97.0 F)
1911
40.6 C (105.1 F)
1912
38.3 C (100.9 F)
1913
36.7 C (98.1 F)
1914
36.1 C (97.0 F)
1915
35.6 C (96.1 F)
1916
36.1 C (97.0 F)
1917
38.3 C (100.9 F)
1918
37.2 C (99.0 F)
1919
40.0 C (104.0 F)
1920
33.9 C (93.0 F)
1921
36.7 C (98.1 F)
1922
36.1 C (97.0 F)
1923
36.7 C (98.1 F)
1924
37.2 C (99.0 F)
1925
38.3 C (100.9 F)
1926
38.3 C (100.9 F)
1927
35.6 C (96.1 F)
1928
36.7 C (98.1 F)
1929
35.0 C (95.0 F)
1930
36.1 C (97.0 F)
1931
35.6 C (96.1 F)
1932
33.3 C (91.9 F)
1933
36.7 C (98.1 F)
1934
36.1 C (97.0 F)
1935
35.0 C (95.0 F)
1936
35.0 C (95.0 F)
1937
36.1 C (97.0 F)
1938
34.4 C (93.9 F)
1939
33.9 C (93.0 F)
1940
34.4 C (93.9 F)
1941
35.0 C (95.0 F)
1942
33.3 C (91.9 F)
1943
34.4 C (93.9 F)
1944
35.6 C (96.1 F)
1945
34.4 C (93.9 F)
1946
34.4 C (93.9 F)
1947
36.7 C (98.1 F)
1948
38.9 C (102.0 F)
1949
38.3 C (100.9 F)
1950
32.8 C (91.0 F)
1951
32.8 C (91.0 F)
1952
36.7 C (98.1 F)
1953
39.4 C (102.9 F)
1954
35.6 C (96.1 F)
1955
36.1 C (97.0 F)
1956
36.1 C (97.0 F)
1957
36.7 C (98.1 F)
1958
33.9 C (93.0 F)
1959
37.2 C (99.0 F)
1960
33.9 C (93.0 F)
Coldest night (TNn)
The coldest night of the year at Lake Cochituate, 1885 to 1960. The record is -33.3 C (-27.9 F) in 1935, marked on the chart; the median year is -26.1 C (-15.0 F).
Coldest night (TNn) at Lake Cochituate by year
Year
Coldest night (TNn)
1885
-24.4 C (-11.9 F)
1886
n/a
1887
n/a
1888
-22.2 C (-8.0 F)
1889
n/a
1890
n/a
1891
-8.9 C (16.0 F)
1892
n/a
1893
-30.0 C (-22.0 F)
1894
-30.6 C (-23.1 F)
1895
-23.9 C (-11.0 F)
1896
-26.7 C (-16.1 F)
1897
-24.4 C (-11.9 F)
1898
-30.0 C (-22.0 F)
1899
-28.9 C (-20.0 F)
1900
-25.0 C (-13.0 F)
1901
-22.8 C (-9.0 F)
1902
-26.7 C (-16.1 F)
1903
-28.9 C (-20.0 F)
1904
-32.8 C (-27.0 F)
1905
-28.3 C (-18.9 F)
1906
-20.0 C (-4.0 F)
1907
-31.1 C (-24.0 F)
1908
-22.8 C (-9.0 F)
1909
-25.6 C (-14.1 F)
1910
-28.3 C (-18.9 F)
1911
-27.2 C (-17.0 F)
1912
-31.1 C (-24.0 F)
1913
-26.1 C (-15.0 F)
1914
-28.9 C (-20.0 F)
1915
-20.6 C (-5.1 F)
1916
-31.1 C (-24.0 F)
1917
-27.2 C (-17.0 F)
1918
-31.1 C (-24.0 F)
1919
-25.0 C (-13.0 F)
1920
-31.1 C (-24.0 F)
1921
-23.3 C (-9.9 F)
1922
-30.6 C (-23.1 F)
1923
-27.8 C (-18.0 F)
1924
-25.0 C (-13.0 F)
1925
-27.8 C (-18.0 F)
1926
-27.2 C (-17.0 F)
1927
-23.9 C (-11.0 F)
1928
-25.6 C (-14.1 F)
1929
-20.6 C (-5.1 F)
1930
-25.6 C (-14.1 F)
1931
-27.8 C (-18.0 F)
1932
-26.7 C (-16.1 F)
1933
-31.7 C (-25.1 F)
1934
-32.8 C (-27.0 F)
1935
-33.3 C (-27.9 F)
1936
-26.7 C (-16.1 F)
1937
-18.3 C (-0.9 F)
1938
-31.7 C (-25.1 F)
1939
-21.1 C (-6.0 F)
1940
-24.4 C (-11.9 F)
1941
-22.8 C (-9.0 F)
1942
-29.4 C (-20.9 F)
1943
-33.3 C (-27.9 F)
1944
-23.3 C (-9.9 F)
1945
-26.7 C (-16.1 F)
1946
-26.1 C (-15.0 F)
1947
-22.2 C (-8.0 F)
1948
-32.2 C (-26.0 F)
1949
-26.1 C (-15.0 F)
1950
-22.8 C (-9.0 F)
1951
-19.4 C (-2.9 F)
1952
-21.7 C (-7.1 F)
1953
-16.7 C (1.9 F)
1954
-27.8 C (-18.0 F)
1955
-24.4 C (-11.9 F)
1956
-19.4 C (-2.9 F)
1957
-31.7 C (-25.1 F)
1958
-21.1 C (-6.0 F)
1959
-20.6 C (-5.1 F)
1960
-16.1 C (3.0 F)
Wettest day (Rx1day)
The wettest day of the year at Lake Cochituate, 1885 to 1960. The record is 176.5 mm (6.9 in) in 1895, marked on the chart; the median year is 72.0 mm (2.8 in).
Wettest day (Rx1day) at Lake Cochituate by year
Year
Wettest day (Rx1day)
1885
69.6 mm (2.7 in)
1886
125.7 mm (4.9 in)
1887
49.3 mm (1.9 in)
1888
101.6 mm (4.0 in)
1889
66.8 mm (2.6 in)
1890
82.3 mm (3.2 in)
1891
61.0 mm (2.4 in)
1892
72.4 mm (2.9 in)
1893
72.6 mm (2.9 in)
1894
55.4 mm (2.2 in)
1895
176.5 mm (6.9 in)
1896
91.4 mm (3.6 in)
1897
72.4 mm (2.9 in)
1898
78.2 mm (3.1 in)
1899
62.7 mm (2.5 in)
1900
77.0 mm (3.0 in)
1901
72.9 mm (2.9 in)
1902
58.9 mm (2.3 in)
1903
72.6 mm (2.9 in)
1904
123.4 mm (4.9 in)
1905
158.2 mm (6.2 in)
1906
87.4 mm (3.4 in)
1907
64.3 mm (2.5 in)
1908
40.6 mm (1.6 in)
1909
67.8 mm (2.7 in)
1910
64.8 mm (2.6 in)
1911
58.4 mm (2.3 in)
1912
66.5 mm (2.6 in)
1913
64.5 mm (2.5 in)
1914
43.7 mm (1.7 in)
1915
66.0 mm (2.6 in)
1916
70.6 mm (2.8 in)
1917
59.2 mm (2.3 in)
1918
63.0 mm (2.5 in)
1919
71.6 mm (2.8 in)
1920
86.1 mm (3.4 in)
1921
89.9 mm (3.5 in)
1922
135.4 mm (5.3 in)
1923
98.0 mm (3.9 in)
1924
71.4 mm (2.8 in)
1925
93.7 mm (3.7 in)
1926
63.0 mm (2.5 in)
1927
80.5 mm (3.2 in)
1928
61.7 mm (2.4 in)
1929
65.0 mm (2.6 in)
1930
64.0 mm (2.5 in)
1931
126.5 mm (5.0 in)
1932
153.4 mm (6.0 in)
1933
129.0 mm (5.1 in)
1934
42.7 mm (1.7 in)
1935
90.7 mm (3.6 in)
1936
76.7 mm (3.0 in)
1937
73.9 mm (2.9 in)
1938
107.4 mm (4.2 in)
1939
108.7 mm (4.3 in)
1940
62.7 mm (2.5 in)
1941
62.7 mm (2.5 in)
1942
94.2 mm (3.7 in)
1943
51.3 mm (2.0 in)
1944
85.9 mm (3.4 in)
1945
68.6 mm (2.7 in)
1946
55.4 mm (2.2 in)
1947
98.6 mm (3.9 in)
1948
45.2 mm (1.8 in)
1949
82.6 mm (3.3 in)
1950
77.5 mm (3.1 in)
1951
65.5 mm (2.6 in)
1952
72.6 mm (2.9 in)
1953
64.0 mm (2.5 in)
1954
175.3 mm (6.9 in)
1955
137.2 mm (5.4 in)
1956
36.8 mm (1.4 in)
1957
35.1 mm (1.4 in)
1958
49.5 mm (1.9 in)
1959
58.4 mm (2.3 in)
1960
74.4 mm (2.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Lake Cochituate, 1885 to 1960. The record is 265.3 mm (10.4 in) in 1938, marked on the chart; the median year is 90.0 mm (3.5 in).
Wettest five days (Rx5day) at Lake Cochituate by year
Year
Wettest five days (Rx5day)
1885
70.6 mm (2.8 in)
1886
126.2 mm (5.0 in)
1887
65.8 mm (2.6 in)
1888
108.9 mm (4.3 in)
1889
113.1 mm (4.5 in)
1890
113.2 mm (4.5 in)
1891
77.5 mm (3.1 in)
1892
80.0 mm (3.1 in)
1893
81.8 mm (3.2 in)
1894
73.4 mm (2.9 in)
1895
177.5 mm (7.0 in)
1896
129.0 mm (5.1 in)
1897
81.8 mm (3.2 in)
1898
82.5 mm (3.2 in)
1899
80.8 mm (3.2 in)
1900
93.8 mm (3.7 in)
1901
74.9 mm (2.9 in)
1902
76.4 mm (3.0 in)
1903
71.1 mm (2.8 in)
1904
136.9 mm (5.4 in)
1905
169.9 mm (6.7 in)
1906
93.8 mm (3.7 in)
1907
71.4 mm (2.8 in)
1908
60.5 mm (2.4 in)
1909
74.7 mm (2.9 in)
1910
64.8 mm (2.6 in)
1911
87.6 mm (3.4 in)
1912
89.2 mm (3.5 in)
1913
84.3 mm (3.3 in)
1914
61.5 mm (2.4 in)
1915
80.5 mm (3.2 in)
1916
71.2 mm (2.8 in)
1917
67.8 mm (2.7 in)
1918
74.9 mm (2.9 in)
1919
97.3 mm (3.8 in)
1920
103.7 mm (4.1 in)
1921
127.3 mm (5.0 in)
1922
151.9 mm (6.0 in)
1923
113.5 mm (4.5 in)
1924
75.2 mm (3.0 in)
1925
94.7 mm (3.7 in)
1926
66.6 mm (2.6 in)
1927
149.6 mm (5.9 in)
1928
100.1 mm (3.9 in)
1929
68.8 mm (2.7 in)
1930
64.0 mm (2.5 in)
1931
126.5 mm (5.0 in)
1932
153.9 mm (6.1 in)
1933
203.7 mm (8.0 in)
1934
67.8 mm (2.7 in)
1935
131.1 mm (5.2 in)
1936
100.3 mm (3.9 in)
1937
77.2 mm (3.0 in)
1938
265.3 mm (10.4 in)
1939
117.3 mm (4.6 in)
1940
103.6 mm (4.1 in)
1941
62.7 mm (2.5 in)
1942
95.7 mm (3.8 in)
1943
69.9 mm (2.8 in)
1944
152.0 mm (6.0 in)
1945
88.1 mm (3.5 in)
1946
66.8 mm (2.6 in)
1947
147.1 mm (5.8 in)
1948
69.6 mm (2.7 in)
1949
90.5 mm (3.6 in)
1950
97.0 mm (3.8 in)
1951
111.4 mm (4.4 in)
1952
115.3 mm (4.5 in)
1953
138.0 mm (5.4 in)
1954
226.9 mm (8.9 in)
1955
252.5 mm (9.9 in)
1956
113.8 mm (4.5 in)
1957
66.5 mm (2.6 in)
1958
89.4 mm (3.5 in)
1959
85.3 mm (3.4 in)
1960
107.2 mm (4.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Lake Cochituate, 1885 to 1960. The record is 36 days in 1915, marked on the chart; the median year is 16 days.
Longest dry spell (CDD) at Lake Cochituate by year
Year
Longest dry spell (CDD)
1885
14 days
1886
14 days
1887
20 days
1888
8 days
1889
18 days
1890
18 days
1891
13 days
1892
17 days
1893
13 days
1894
16 days
1895
16 days
1896
13 days
1897
15 days
1898
10 days
1899
12 days
1900
22 days
1901
17 days
1902
15 days
1903
12 days
1904
17 days
1905
16 days
1906
12 days
1907
11 days
1908
22 days
1909
13 days
1910
14 days
1911
17 days
1912
19 days
1913
18 days
1914
26 days
1915
36 days
1916
13 days
1917
17 days
1918
19 days
1919
15 days
1920
28 days
1921
19 days
1922
21 days
1923
16 days
1924
35 days
1925
20 days
1926
17 days
1927
15 days
1928
11 days
1929
14 days
1930
20 days
1931
21 days
1932
14 days
1933
13 days
1934
18 days
1935
20 days
1936
15 days
1937
10 days
1938
13 days
1939
25 days
1940
17 days
1941
19 days
1942
15 days
1943
19 days
1944
18 days
1945
11 days
1946
18 days
1947
35 days
1948
13 days
1949
16 days
1950
17 days
1951
12 days
1952
15 days
1953
14 days
1954
12 days
1955
24 days
1956
17 days
1957
19 days
1958
21 days
1959
15 days
1960
15 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
55 years with a frost
Across 55 years with a frost, the median last spring frost at Lake Cochituate falls on 17 May and the median first autumn frost on 27 September, which leaves a median of 127 days between them.
Fitted over all years, the growing season changes by +2.0 days per decade at this station.
Frost dates and growing season at Lake Cochituate
Measure
Median, all years
Earliest period
Recent period (1925 to 1959)
Recent against earliest
Fitted trend
Last spring frost
17 May
n/a
18 May
n/a
-0.9 days per decade
First autumn frost
27 September
n/a
28 September
n/a
+1.1 days per decade
Growing days
127 days
n/a
128 days
n/a
+2.0 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
47 years, 1886 to 1959
A day with at least 73.5 mm (2.9 in) of rain is expected about once in 2 years. A day with at least 212.2 mm (8.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Lake Cochituate: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
73.5 mm (2.9 in)
5 years
101.2 mm (4.0 in)
10 years
122.8 mm (4.8 in)
25 years
154.5 mm (6.1 in)
50 years
181.7 mm (7.2 in)
Longer than the 47 years of record
100 years
212.2 mm (8.4 in)
Longer than the 47 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, 47 years of values from 1886 to 1959.
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: 175.3 mm (6.9 in) in 1954; 158.2 mm (6.2 in) in 1905; 153.4 mm (6.0 in) in 1932.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Lake Cochituate standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Lake Cochituate 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.