Record envelope, standing records and threshold days for Hoosac Tunnel (USC00193713), Massachusetts, United States, with 44 years of record.
Key Facts for Hoosac Tunnel
Hoosac Tunnel (USC00193713) is a weather station in Massachusetts, United States at 42.68 latitude and -72.97 longitude, 244 m (801 ft) above sea level.
The station reports from 1930 to 1973, 44 years of record.
1,464 records set at Hoosac Tunnel still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Hoosac Tunnel tied a daily record high minimum temperature of 18.9 C (66.0 F) on 30 June 1973.
About the Station
Location: Massachusetts, United States, 42.68 latitude, -72.97 longitude.
Elevation: 244 m (801 ft).
Period of record: 1930 to 1973, 44 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 Hoosac Tunnel. 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 Hoosac Tunnel, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
18.3 C (64.9 F)
-29.4 C (-20.9 F)
n/a
n/a
Feb
16.7 C (62.1 F)
-32.2 C (-26.0 F)
n/a
n/a
Mar
28.3 C (82.9 F)
-28.9 C (-20.0 F)
n/a
n/a
Apr
32.8 C (91.0 F)
-12.2 C (10.0 F)
n/a
n/a
May
33.3 C (91.9 F)
-3.9 C (25.0 F)
n/a
n/a
Jun
35.0 C (95.0 F)
-0.6 C (30.9 F)
n/a
n/a
Jul
35.6 C (96.1 F)
2.8 C (37.0 F)
n/a
n/a
Aug
36.1 C (97.0 F)
0.6 C (33.1 F)
n/a
n/a
Sep
36.1 C (97.0 F)
-3.9 C (25.0 F)
n/a
n/a
Oct
31.1 C (88.0 F)
-8.9 C (16.0 F)
n/a
n/a
Nov
27.2 C (81.0 F)
-19.4 C (-2.9 F)
n/a
n/a
Dec
16.7 C (62.1 F)
-31.1 C (-24.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Hoosac Tunnel still stand. 1936 holds the most, with 55.
Standing records at Hoosac Tunnel by the year they were set
Year set
Standing records
1930
19
1931
37
1932
44
1933
51
1934
45
1935
30
1936
55
1937
30
1938
33
1939
26
1940
46
1941
30
1942
38
1943
44
1944
22
1945
46
1946
36
1947
30
1948
39
1949
34
1950
37
1951
31
1952
14
1953
34
1954
31
1955
26
1956
44
1957
44
1958
24
1959
40
1960
19
1961
29
1962
22
1963
34
1964
35
1965
38
1966
27
1967
39
1968
34
1969
24
1970
33
1971
23
1972
28
1973
19
Wettest Day of Each Month
Dec: 116.8 mm (4.6 in)
The wettest day on record for each calendar month at Hoosac Tunnel. The most was 116.8 mm (4.6 in) on 31 December 1948.
Record daily precipitation for each month at Hoosac Tunnel
Month
Record daily precipitation (mm)
Date
Jan
72.1 mm (2.8 in)
1 January 1949
Feb
53.3 mm (2.1 in)
11 February 1970
Mar
58.7 mm (2.3 in)
19 March 1936
Apr
65.0 mm (2.6 in)
25 April 1968
May
67.1 mm (2.6 in)
15 May 1937
Jun
61.2 mm (2.4 in)
16 June 1969
Jul
78.2 mm (3.1 in)
29 July 1969
Aug
84.3 mm (3.3 in)
19 August 1955
Sep
108.2 mm (4.3 in)
22 September 1938
Oct
85.1 mm (3.4 in)
15 October 1955
Nov
105.7 mm (4.2 in)
26 November 1950
Dec
116.8 mm (4.6 in)
31 December 1948
Period of Record Coverage
1930 to 1973
Complete yearUnder 90 percent of days
44 years of record at Hoosac Tunnel, 1930 to 1973. 5 years have data for under 90 percent of days and are left out of rankings: 1930, 1932, 1939, 1940, 1973.
Cooler than the station meanWarmer than the station mean
One stripe for each of 38 complete years at Hoosac Tunnel, 1933 to 1972. Blue stripes are years cooler than the station's own mean of 7.3 C (45.2 F); red stripes are warmer. The coolest year was 1958, at 6.1 C (43.1 F), and the warmest was 1949, at 8.9 C (48.1 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Hoosac Tunnel as warming stripes, 1933 to 1972
Year
Annual mean temperature
Difference from the station mean
1933
8.1 C
+0.81 C
1934
7.3 C
-0.02 C
1935
7.3 C
-0.07 C
1936
7.6 C
+0.29 C
1937
7.3 C
+0.00 C
1938
7.9 C
+0.55 C
1941
7.5 C
+0.16 C
1942
7.6 C
+0.26 C
1943
6.8 C
-0.50 C
1944
7.4 C
+0.08 C
1945
7.8 C
+0.48 C
1946
8.1 C
+0.74 C
1947
7.4 C
+0.10 C
1948
7.7 C
+0.39 C
1949
8.9 C
+1.60 C
1950
7.5 C
+0.13 C
1951
8.1 C
+0.76 C
1952
8.3 C
+1.02 C
1953
8.7 C
+1.37 C
1954
7.5 C
+0.19 C
1955
7.5 C
+0.19 C
1956
6.6 C
-0.68 C
1957
7.8 C
+0.43 C
1958
6.1 C
-1.18 C
1959
7.6 C
+0.26 C
1960
6.7 C
-0.59 C
1961
7.1 C
-0.27 C
1962
6.3 C
-1.06 C
1963
6.4 C
-0.96 C
1964
6.9 C
-0.41 C
1965
6.5 C
-0.82 C
1966
6.7 C
-0.62 C
1967
6.3 C
-1.05 C
1968
6.9 C
-0.47 C
1969
7.3 C
-0.04 C
1970
7.0 C
-0.31 C
1971
7.2 C
-0.09 C
1972
6.6 C
-0.75 C
The annual mean temperature here has fallen by 0.3 C (0.1 to 0.5) per decade over 1933 to 1972. In Fahrenheit: 0.5 F (0.2 to 0.8) per decade. The slope is a straight line fitted to 38 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Hoosac Tunnel
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.3 C (-0.5 to -0.1) per decade
-0.5 F (-0.8 to -0.2) per decade
1933 to 1972
38
Fall
Mean daily maximum
-0.5 C (-0.7 to -0.2) per decade
-0.8 F (-1.2 to -0.4) per decade
1933 to 1972
38
Fall
Mean daily minimum
-0.13 C (-0.29 to 0.03) per decade
-0.2 F (-0.5 to 0.1) per decade
1933 to 1972
38
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
1930 to 1973
Yearly extremes at Hoosac Tunnel: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
36.1 C (97.0 F)
1937
33.3 C (91.9 F)
44
Coldest night (TNn)
-32.2 C (-26.0 F)
1934
-24.7 C (-12.5 F)
44
Wettest day (Rx1day)
116.8 mm (4.6 in)
1948
55.4 mm (2.2 in)
44
Wettest five days (Rx5day)
251.8 mm (9.9 in)
1938
85.7 mm (3.4 in)
44
Longest dry spell (CDD)
35 days
1947
15 days
44
Hottest day (TXx)
The hottest day of the year at Hoosac Tunnel, 1930 to 1973. The record is 36.1 C (97.0 F) in 1937, marked on the chart; the median year is 33.3 C (91.9 F).
Hottest day (TXx) at Hoosac Tunnel by year
Year
Hottest day (TXx)
1930
34.4 C (93.9 F)
1931
34.4 C (93.9 F)
1932
31.1 C (88.0 F)
1933
35.0 C (95.0 F)
1934
33.3 C (91.9 F)
1935
32.8 C (91.0 F)
1936
35.6 C (96.1 F)
1937
36.1 C (97.0 F)
1938
36.1 C (97.0 F)
1939
33.3 C (91.9 F)
1940
33.3 C (91.9 F)
1941
33.3 C (91.9 F)
1942
34.4 C (93.9 F)
1943
33.9 C (93.0 F)
1944
35.0 C (95.0 F)
1945
34.4 C (93.9 F)
1946
33.3 C (91.9 F)
1947
33.3 C (91.9 F)
1948
35.0 C (95.0 F)
1949
33.3 C (91.9 F)
1950
32.2 C (90.0 F)
1951
32.2 C (90.0 F)
1952
35.0 C (95.0 F)
1953
36.1 C (97.0 F)
1954
33.9 C (93.0 F)
1955
35.6 C (96.1 F)
1956
33.3 C (91.9 F)
1957
34.4 C (93.9 F)
1958
31.7 C (89.1 F)
1959
33.3 C (91.9 F)
1960
30.6 C (87.1 F)
1961
31.1 C (88.0 F)
1962
33.3 C (91.9 F)
1963
33.9 C (93.0 F)
1964
32.8 C (91.0 F)
1965
32.8 C (91.0 F)
1966
33.9 C (93.0 F)
1967
32.2 C (90.0 F)
1968
33.9 C (93.0 F)
1969
35.0 C (95.0 F)
1970
33.3 C (91.9 F)
1971
32.8 C (91.0 F)
1972
32.8 C (91.0 F)
1973
33.9 C (93.0 F)
Coldest night (TNn)
The coldest night of the year at Hoosac Tunnel, 1930 to 1973. The record is -32.2 C (-26.0 F) in 1934, marked on the chart; the median year is -24.7 C (-12.5 F).
Coldest night (TNn) at Hoosac Tunnel by year
Year
Coldest night (TNn)
1930
-18.9 C (-2.0 F)
1931
-28.3 C (-18.9 F)
1932
-22.8 C (-9.0 F)
1933
-31.1 C (-24.0 F)
1934
-32.2 C (-26.0 F)
1935
-28.3 C (-18.9 F)
1936
-26.1 C (-15.0 F)
1937
-18.9 C (-2.0 F)
1938
-25.6 C (-14.1 F)
1939
-23.3 C (-9.9 F)
1940
-24.4 C (-11.9 F)
1941
-25.0 C (-13.0 F)
1942
-27.2 C (-17.0 F)
1943
-32.2 C (-26.0 F)
1944
-22.2 C (-8.0 F)
1945
-23.3 C (-9.9 F)
1946
-21.1 C (-6.0 F)
1947
-20.0 C (-4.0 F)
1948
-28.3 C (-18.9 F)
1949
-20.6 C (-5.1 F)
1950
-28.9 C (-20.0 F)
1951
-23.9 C (-11.0 F)
1952
-20.6 C (-5.1 F)
1953
-16.1 C (3.0 F)
1954
-26.7 C (-16.1 F)
1955
-23.9 C (-11.0 F)
1956
-21.7 C (-7.1 F)
1957
-29.4 C (-20.9 F)
1958
-28.9 C (-20.0 F)
1959
-23.3 C (-9.9 F)
1960
-25.0 C (-13.0 F)
1961
-28.3 C (-18.9 F)
1962
-26.1 C (-15.0 F)
1963
-28.3 C (-18.9 F)
1964
-24.4 C (-11.9 F)
1965
-22.8 C (-9.0 F)
1966
-23.9 C (-11.0 F)
1967
-25.6 C (-14.1 F)
1968
-29.4 C (-20.9 F)
1969
-23.9 C (-11.0 F)
1970
-25.0 C (-13.0 F)
1971
-25.6 C (-14.1 F)
1972
-22.8 C (-9.0 F)
1973
-21.7 C (-7.1 F)
Wettest day (Rx1day)
The wettest day of the year at Hoosac Tunnel, 1930 to 1973. The record is 116.8 mm (4.6 in) in 1948, marked on the chart; the median year is 55.4 mm (2.2 in).
Wettest day (Rx1day) at Hoosac Tunnel by year
Year
Wettest day (Rx1day)
1930
30.2 mm (1.2 in)
1931
50.0 mm (2.0 in)
1932
43.7 mm (1.7 in)
1933
53.6 mm (2.1 in)
1934
66.3 mm (2.6 in)
1935
52.3 mm (2.1 in)
1936
58.7 mm (2.3 in)
1937
67.1 mm (2.6 in)
1938
108.2 mm (4.3 in)
1939
58.2 mm (2.3 in)
1940
43.2 mm (1.7 in)
1941
54.9 mm (2.2 in)
1942
51.8 mm (2.0 in)
1943
75.2 mm (3.0 in)
1944
42.4 mm (1.7 in)
1945
64.8 mm (2.6 in)
1946
46.5 mm (1.8 in)
1947
55.9 mm (2.2 in)
1948
116.8 mm (4.6 in)
1949
72.1 mm (2.8 in)
1950
105.7 mm (4.2 in)
1951
72.4 mm (2.9 in)
1952
69.3 mm (2.7 in)
1953
63.5 mm (2.5 in)
1954
60.2 mm (2.4 in)
1955
85.1 mm (3.4 in)
1956
32.5 mm (1.3 in)
1957
42.2 mm (1.7 in)
1958
39.6 mm (1.6 in)
1959
51.6 mm (2.0 in)
1960
71.6 mm (2.8 in)
1961
34.3 mm (1.4 in)
1962
61.0 mm (2.4 in)
1963
48.0 mm (1.9 in)
1964
49.0 mm (1.9 in)
1965
38.9 mm (1.5 in)
1966
74.7 mm (2.9 in)
1967
34.8 mm (1.4 in)
1968
65.0 mm (2.6 in)
1969
78.2 mm (3.1 in)
1970
53.3 mm (2.1 in)
1971
66.0 mm (2.6 in)
1972
51.1 mm (2.0 in)
1973
41.1 mm (1.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Hoosac Tunnel, 1930 to 1973. The record is 251.8 mm (9.9 in) in 1938, marked on the chart; the median year is 85.7 mm (3.4 in).
Wettest five days (Rx5day) at Hoosac Tunnel by year
Year
Wettest five days (Rx5day)
1930
59.7 mm (2.4 in)
1931
108.4 mm (4.3 in)
1932
74.4 mm (2.9 in)
1933
84.9 mm (3.3 in)
1934
79.0 mm (3.1 in)
1935
75.3 mm (3.0 in)
1936
118.2 mm (4.7 in)
1937
101.6 mm (4.0 in)
1938
251.8 mm (9.9 in)
1939
79.5 mm (3.1 in)
1940
78.5 mm (3.1 in)
1941
64.0 mm (2.5 in)
1942
90.7 mm (3.6 in)
1943
90.7 mm (3.6 in)
1944
105.1 mm (4.1 in)
1945
85.4 mm (3.4 in)
1946
82.4 mm (3.2 in)
1947
101.8 mm (4.0 in)
1948
163.3 mm (6.4 in)
1949
235.7 mm (9.3 in)
1950
115.2 mm (4.5 in)
1951
107.7 mm (4.2 in)
1952
88.7 mm (3.5 in)
1953
105.6 mm (4.2 in)
1954
92.2 mm (3.6 in)
1955
183.4 mm (7.2 in)
1956
59.5 mm (2.3 in)
1957
57.7 mm (2.3 in)
1958
56.7 mm (2.2 in)
1959
94.5 mm (3.7 in)
1960
146.3 mm (5.8 in)
1961
51.1 mm (2.0 in)
1962
85.5 mm (3.4 in)
1963
73.2 mm (2.9 in)
1964
60.2 mm (2.4 in)
1965
78.8 mm (3.1 in)
1966
91.2 mm (3.6 in)
1967
70.6 mm (2.8 in)
1968
83.2 mm (3.3 in)
1969
121.2 mm (4.8 in)
1970
63.2 mm (2.5 in)
1971
98.0 mm (3.9 in)
1972
85.9 mm (3.4 in)
1973
78.5 mm (3.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Hoosac Tunnel, 1930 to 1973. The record is 35 days in 1947, marked on the chart; the median year is 15 days.
Longest dry spell (CDD) at Hoosac Tunnel by year
Year
Longest dry spell (CDD)
1930
17 days
1931
13 days
1932
18 days
1933
11 days
1934
13 days
1935
19 days
1936
14 days
1937
10 days
1938
21 days
1939
12 days
1940
12 days
1941
19 days
1942
18 days
1943
15 days
1944
16 days
1945
9 days
1946
13 days
1947
35 days
1948
15 days
1949
19 days
1950
14 days
1951
14 days
1952
25 days
1953
25 days
1954
13 days
1955
17 days
1956
18 days
1957
16 days
1958
14 days
1959
10 days
1960
17 days
1961
15 days
1962
11 days
1963
23 days
1964
20 days
1965
12 days
1966
18 days
1967
14 days
1968
18 days
1969
13 days
1970
17 days
1971
14 days
1972
15 days
1973
14 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
38 years with a frost
Across 38 years with a frost, the median last spring frost at Hoosac Tunnel falls on 16 May and the median first autumn frost on 30 September, which leaves a median of 140 days between them.
Fitted over all years, the growing season changes by 0.0 days per decade at this station.
Frost dates and growing season at Hoosac Tunnel
Measure
Median, all years
Earliest period
Recent period (1943 to 1972)
Recent against earliest
Fitted trend
Last spring frost
16 May
n/a
16 May
n/a
+1.3 days per decade
First autumn frost
30 September
n/a
29 September
n/a
+1.3 days per decade
Growing days
140 days
n/a
138 days
n/a
0.0 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
40 years, 1931 to 1972
A day with at least 57.3 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 123.6 mm (4.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Hoosac Tunnel: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
57.3 mm (2.3 in)
5 years
74.4 mm (2.9 in)
10 years
86.0 mm (3.4 in)
25 years
100.9 mm (4.0 in)
50 years
112.2 mm (4.4 in)
Longer than the 40 years of record
100 years
123.6 mm (4.9 in)
Longer than the 40 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, 40 years of values from 1931 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: 116.8 mm (4.6 in) in 1948; 108.2 mm (4.3 in) in 1938; 105.7 mm (4.2 in) in 1950.
Download the Data
Data for Hoosac Tunnel standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Hoosac Tunnel 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.