Record envelope, standing records and threshold days for Boyds 2 NW (USC00181032), Maryland, United States, with 73 years of record.
Key Facts for Boyds 2 NW
Boyds 2 NW (USC00181032) is a weather station in Maryland, United States at 39.22 latitude and -77.33 longitude, 177 m (580 ft) above sea level.
The station reports from 1919 to 1991, 73 years of record.
1,464 records set at Boyds 2 NW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Boyds 2 NW set a daily record high minimum temperature of 6.7 C (44.1 F) on 7 February 1991.
About the Station
Location: Maryland, United States, 39.22 latitude, -77.33 longitude.
Elevation: 177 m (580 ft).
Period of record: 1919 to 1991, 73 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 Boyds 2 NW. 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 Boyds 2 NW, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
25.6 C (78.1 F)
-27.2 C (-17.0 F)
n/a
n/a
Feb
25.6 C (78.1 F)
-25.6 C (-14.1 F)
n/a
n/a
Mar
30.6 C (87.1 F)
-17.8 C (0.0 F)
n/a
n/a
Apr
34.4 C (93.9 F)
-11.7 C (10.9 F)
n/a
n/a
May
36.1 C (97.0 F)
-2.2 C (28.0 F)
n/a
n/a
Jun
39.4 C (102.9 F)
0.0 C (32.0 F)
n/a
n/a
Jul
40.0 C (104.0 F)
6.1 C (43.0 F)
n/a
n/a
Aug
39.4 C (102.9 F)
5.0 C (41.0 F)
n/a
n/a
Sep
38.9 C (102.0 F)
-0.6 C (30.9 F)
n/a
n/a
Oct
36.1 C (97.0 F)
-7.2 C (19.0 F)
n/a
n/a
Nov
28.3 C (82.9 F)
-16.7 C (1.9 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 Boyds 2 NW still stand. 1921 holds the most, with 46.
Standing records at Boyds 2 NW by the year they were set
Year set
Standing records
1919
2
1920
28
1921
46
1922
34
1923
36
1924
25
1925
43
1926
39
1927
34
1928
34
1929
39
1930
18
1931
31
1932
45
1933
33
1934
40
1935
14
1936
32
1937
5
1938
24
1939
11
1940
17
1941
24
1942
16
1943
23
1944
10
1945
22
1946
20
1947
21
1948
10
1949
19
1953
12
1954
18
1955
16
1956
26
1957
18
1958
15
1959
10
1960
16
1961
15
1962
18
1963
22
1964
10
1965
10
1966
17
1967
19
1968
10
1969
9
1970
21
1971
19
1972
19
1973
13
1974
17
1975
15
1976
20
1977
22
1978
9
1979
25
1980
9
1981
13
1982
24
1983
19
1984
19
1985
17
1986
24
1987
10
1988
27
1989
29
1990
31
1991
6
All-Time Record Progression
7 new records
7 all-time records were set at Boyds 2 NW between 22 September 1957 and 18 July 1988. Each dot is a new record.
When Boyds 2 NW set new all-time records
Date
Kind
Detail
1957-09-22
Record high minimum temperature
Record high minimum temperature 26.1 C (79.0 F)
1966-01-29
Record low maximum temperature
Record low maximum temperature -11.1 C (12.0 F)
1970-01-09
Record low maximum temperature
Record low maximum temperature -13.9 C (7.0 F)
1972-06-22
Record daily precipitation
Record daily precipitation 205.0 mm (8.1 in)
1979-02-19
Record daily snowfall
Record daily snowfall 45.7 cm (18.0 in)
1983-02-11
Record snow depth
Record snow depth 66.0 cm (26.0 in)
1988-07-18
Record high minimum temperature
Record high minimum temperature 29.4 C (84.9 F)
Wettest Day of Each Month
Jun: 205.0 mm (8.1 in)
The wettest day on record for each calendar month at Boyds 2 NW. The most was 205.0 mm (8.1 in) on 22 June 1972.
Record daily precipitation for each month at Boyds 2 NW
Month
Record daily precipitation (mm)
Date
Jan
63.5 mm (2.5 in)
11 January 1991
Feb
48.5 mm (1.9 in)
23 February 1987
Mar
62.0 mm (2.4 in)
7 March 1967
Apr
59.7 mm (2.4 in)
9 April 1940
May
102.9 mm (4.1 in)
6 May 1989
Jun
205.0 mm (8.1 in)
22 June 1972
Jul
73.9 mm (2.9 in)
12 July 1949
Aug
109.5 mm (4.3 in)
23 August 1933
Sep
155.4 mm (6.1 in)
5 September 1935
Oct
82.6 mm (3.3 in)
2 October 1929
Nov
57.9 mm (2.3 in)
7 November 1963
Dec
78.7 mm (3.1 in)
2 December 1974
Period of Record Coverage
1919 to 1991
Complete yearUnder 90 percent of days
70 years of record at Boyds 2 NW, 1919 to 1991. 13 years have data for under 90 percent of days and are left out of rankings: 1919, 1930, 1935, 1937, 1939, 1940, 1948, 1953 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 51 complete years at Boyds 2 NW, 1920 to 1989. Blue stripes are years cooler than the station's own mean of 12.3 C (54.2 F); red stripes are warmer. The coolest year was 1958, at 11.1 C (51.9 F), and the warmest was 1921, at 13.9 C (57.0 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Boyds 2 NW as warming stripes, 1920 to 1989
Year
Annual mean temperature
Difference from the station mean
1920
11.8 C
-0.57 C
1921
13.9 C
+1.57 C
1922
12.9 C
+0.55 C
1923
12.6 C
+0.25 C
1924
11.6 C
-0.69 C
1925
12.3 C
-0.01 C
1926
11.4 C
-0.94 C
1927
12.4 C
+0.03 C
1931
12.8 C
+0.45 C
1932
12.2 C
-0.13 C
1933
12.2 C
-0.16 C
1934
11.6 C
-0.70 C
1938
12.6 C
+0.25 C
1942
12.6 C
+0.29 C
1943
12.5 C
+0.16 C
1945
12.6 C
+0.24 C
1946
13.1 C
+0.76 C
1947
12.3 C
+0.02 C
1949
13.7 C
+1.33 C
1955
12.4 C
+0.06 C
1956
12.0 C
-0.35 C
1957
12.6 C
+0.25 C
1958
11.1 C
-1.26 C
1960
11.5 C
-0.84 C
1961
11.8 C
-0.51 C
1962
11.5 C
-0.86 C
1963
11.4 C
-0.91 C
1966
12.0 C
-0.31 C
1967
11.6 C
-0.71 C
1968
12.1 C
-0.25 C
1969
11.8 C
-0.54 C
1970
12.3 C
+0.01 C
1971
12.5 C
+0.22 C
1972
12.0 C
-0.31 C
1973
13.3 C
+0.94 C
1974
12.8 C
+0.49 C
1975
12.7 C
+0.40 C
1976
12.0 C
-0.28 C
1977
12.6 C
+0.27 C
1978
11.7 C
-0.58 C
1979
12.1 C
-0.26 C
1980
12.4 C
+0.06 C
1981
12.3 C
-0.04 C
1982
12.2 C
-0.10 C
1983
12.7 C
+0.35 C
1984
12.8 C
+0.45 C
1985
13.0 C
+0.66 C
1986
12.9 C
+0.54 C
1987
13.0 C
+0.64 C
1988
12.4 C
+0.12 C
1989
12.2 C
-0.16 C
The fitted trend in annual mean temperature here over 1920 to 1989 is 0.01 C (-0.07 to 0.08) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.01 F (-0.13 to 0.15) per decade. The slope is a straight line fitted to 51 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Boyds 2 NW
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.01 C (-0.07 to 0.08) per decade
0.01 F (-0.13 to 0.15) per decade
1920 to 1989
51
Not clearly different from zero
Mean daily maximum
-0.2 C (-0.3 to -0.1) per decade
-0.3 F (-0.5 to -0.2) per decade
1920 to 1989
51
Fall
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.3 F (0.2 to 0.5) per decade
1920 to 1989
51
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
1919 to 1991
Yearly extremes at Boyds 2 NW: 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)
1926
35.6 C (96.1 F)
70
Coldest night (TNn)
-27.2 C (-17.0 F)
1935
-16.1 C (3.0 F)
70
Wettest day (Rx1day)
205.0 mm (8.1 in)
1972
58.2 mm (2.3 in)
69
Wettest five days (Rx5day)
263.9 mm (10.4 in)
1972
86.2 mm (3.4 in)
69
Longest dry spell (CDD)
32 days
1947
18 days
69
Hottest day (TXx)
The hottest day of the year at Boyds 2 NW, 1919 to 1991. The record is 40.0 C (104.0 F) in 1926, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Boyds 2 NW by year
Year
Hottest day (TXx)
1919
5.6 C (42.1 F)
1920
35.0 C (95.0 F)
1921
37.2 C (99.0 F)
1922
36.1 C (97.0 F)
1923
38.3 C (100.9 F)
1924
39.4 C (102.9 F)
1925
38.3 C (100.9 F)
1926
40.0 C (104.0 F)
1927
36.7 C (98.1 F)
1928
36.1 C (97.0 F)
1929
37.8 C (100.0 F)
1930
23.3 C (73.9 F)
1931
36.7 C (98.1 F)
1932
38.9 C (102.0 F)
1933
36.1 C (97.0 F)
1934
39.4 C (102.9 F)
1935
30.6 C (87.1 F)
1936
39.4 C (102.9 F)
1937
22.2 C (72.0 F)
1938
36.1 C (97.0 F)
1939
35.6 C (96.1 F)
1940
33.3 C (91.9 F)
1941
37.2 C (99.0 F)
1942
35.0 C (95.0 F)
1943
38.3 C (100.9 F)
1944
36.7 C (98.1 F)
1945
35.0 C (95.0 F)
1946
36.1 C (97.0 F)
1947
34.4 C (93.9 F)
1948
33.9 C (93.0 F)
1949
36.1 C (97.0 F)
1953
35.6 C (96.1 F)
1954
38.3 C (100.9 F)
1955
37.8 C (100.0 F)
1956
34.4 C (93.9 F)
1957
37.8 C (100.0 F)
1958
33.3 C (91.9 F)
1959
33.3 C (91.9 F)
1960
35.0 C (95.0 F)
1961
34.4 C (93.9 F)
1962
36.1 C (97.0 F)
1963
35.6 C (96.1 F)
1964
35.6 C (96.1 F)
1965
35.0 C (95.0 F)
1966
36.7 C (98.1 F)
1967
33.3 C (91.9 F)
1968
36.7 C (98.1 F)
1969
35.0 C (95.0 F)
1970
34.4 C (93.9 F)
1971
32.8 C (91.0 F)
1972
33.9 C (93.0 F)
1973
34.4 C (93.9 F)
1974
32.8 C (91.0 F)
1975
34.4 C (93.9 F)
1976
32.8 C (91.0 F)
1977
36.7 C (98.1 F)
1978
34.4 C (93.9 F)
1979
35.6 C (96.1 F)
1980
37.2 C (99.0 F)
1981
33.9 C (93.0 F)
1982
33.9 C (93.0 F)
1983
37.8 C (100.0 F)
1984
34.4 C (93.9 F)
1985
35.0 C (95.0 F)
1986
36.1 C (97.0 F)
1987
35.0 C (95.0 F)
1988
37.8 C (100.0 F)
1989
34.4 C (93.9 F)
1990
35.0 C (95.0 F)
1991
22.2 C (72.0 F)
Coldest night (TNn)
The coldest night of the year at Boyds 2 NW, 1919 to 1991. The record is -27.2 C (-17.0 F) in 1935, marked on the chart; the median year is -16.1 C (3.0 F).
Coldest night (TNn) at Boyds 2 NW by year
Year
Coldest night (TNn)
1919
-13.3 C (8.1 F)
1920
-14.4 C (6.1 F)
1921
-13.9 C (7.0 F)
1922
-17.2 C (1.0 F)
1923
-13.3 C (8.1 F)
1924
-16.1 C (3.0 F)
1925
-17.2 C (1.0 F)
1926
-18.9 C (-2.0 F)
1927
-16.1 C (3.0 F)
1928
-21.1 C (-6.0 F)
1929
-15.0 C (5.0 F)
1930
-25.0 C (-13.0 F)
1931
-13.9 C (7.0 F)
1932
-18.3 C (-0.9 F)
1933
-20.0 C (-4.0 F)
1934
-25.6 C (-14.1 F)
1935
-27.2 C (-17.0 F)
1936
-23.9 C (-11.0 F)
1937
-13.3 C (8.1 F)
1938
-16.7 C (1.9 F)
1939
-17.8 C (0.0 F)
1940
-20.6 C (-5.1 F)
1941
-11.1 C (12.0 F)
1942
-20.0 C (-4.0 F)
1943
-16.1 C (3.0 F)
1944
-11.7 C (10.9 F)
1945
-13.9 C (7.0 F)
1946
-15.0 C (5.0 F)
1947
-16.1 C (3.0 F)
1948
-20.6 C (-5.1 F)
1949
-10.6 C (12.9 F)
1953
-10.0 C (14.0 F)
1954
-14.4 C (6.1 F)
1955
-17.2 C (1.0 F)
1956
-10.6 C (12.9 F)
1957
-20.0 C (-4.0 F)
1958
-17.8 C (0.0 F)
1959
-17.8 C (0.0 F)
1960
-18.3 C (-0.9 F)
1961
-21.7 C (-7.1 F)
1962
-17.8 C (0.0 F)
1963
-19.4 C (-2.9 F)
1964
-15.0 C (5.0 F)
1965
-17.2 C (1.0 F)
1966
-15.0 C (5.0 F)
1967
-13.9 C (7.0 F)
1968
-16.7 C (1.9 F)
1969
-12.8 C (9.0 F)
1970
-19.4 C (-2.9 F)
1971
-14.4 C (6.1 F)
1972
-18.9 C (-2.0 F)
1973
-15.0 C (5.0 F)
1974
-11.7 C (10.9 F)
1975
-13.3 C (8.1 F)
1976
-15.0 C (5.0 F)
1977
-21.7 C (-7.1 F)
1978
-13.9 C (7.0 F)
1979
-18.9 C (-2.0 F)
1980
-15.6 C (3.9 F)
1981
-16.1 C (3.0 F)
1982
-24.4 C (-11.9 F)
1983
-20.0 C (-4.0 F)
1984
-18.9 C (-2.0 F)
1985
-23.3 C (-9.9 F)
1986
-14.4 C (6.1 F)
1987
-16.1 C (3.0 F)
1988
-15.6 C (3.9 F)
1989
-18.3 C (-0.9 F)
1990
-13.3 C (8.1 F)
1991
-11.7 C (10.9 F)
Wettest day (Rx1day)
The wettest day of the year at Boyds 2 NW, 1919 to 1991. The record is 205.0 mm (8.1 in) in 1972, marked on the chart; the median year is 58.2 mm (2.3 in).
Wettest day (Rx1day) at Boyds 2 NW by year
Year
Wettest day (Rx1day)
1919
n/a
1920
69.9 mm (2.8 in)
1921
40.6 mm (1.6 in)
1922
51.1 mm (2.0 in)
1923
33.0 mm (1.3 in)
1924
81.3 mm (3.2 in)
1925
45.2 mm (1.8 in)
1926
53.3 mm (2.1 in)
1927
49.5 mm (1.9 in)
1928
73.7 mm (2.9 in)
1929
82.6 mm (3.3 in)
1930
28.2 mm (1.1 in)
1931
47.2 mm (1.9 in)
1932
61.5 mm (2.4 in)
1933
109.5 mm (4.3 in)
1934
99.8 mm (3.9 in)
1935
155.4 mm (6.1 in)
1936
54.6 mm (2.1 in)
1937
31.0 mm (1.2 in)
1938
45.2 mm (1.8 in)
1939
55.4 mm (2.2 in)
1940
59.7 mm (2.4 in)
1941
49.5 mm (1.9 in)
1942
73.4 mm (2.9 in)
1943
48.3 mm (1.9 in)
1944
50.3 mm (2.0 in)
1945
68.3 mm (2.7 in)
1946
67.6 mm (2.7 in)
1947
51.6 mm (2.0 in)
1948
71.1 mm (2.8 in)
1949
73.9 mm (2.9 in)
1953
106.2 mm (4.2 in)
1954
48.5 mm (1.9 in)
1955
77.7 mm (3.1 in)
1956
62.2 mm (2.4 in)
1957
52.3 mm (2.1 in)
1958
58.2 mm (2.3 in)
1959
54.1 mm (2.1 in)
1960
61.0 mm (2.4 in)
1961
34.8 mm (1.4 in)
1962
49.5 mm (1.9 in)
1963
60.2 mm (2.4 in)
1964
35.8 mm (1.4 in)
1965
68.1 mm (2.7 in)
1966
133.4 mm (5.3 in)
1967
62.0 mm (2.4 in)
1968
59.4 mm (2.3 in)
1969
97.5 mm (3.8 in)
1970
57.2 mm (2.3 in)
1971
131.1 mm (5.2 in)
1972
205.0 mm (8.1 in)
1973
105.2 mm (4.1 in)
1974
78.7 mm (3.1 in)
1975
69.9 mm (2.8 in)
1976
57.2 mm (2.3 in)
1977
50.8 mm (2.0 in)
1978
52.1 mm (2.1 in)
1979
85.1 mm (3.4 in)
1980
43.4 mm (1.7 in)
1981
45.5 mm (1.8 in)
1982
49.0 mm (1.9 in)
1983
57.4 mm (2.3 in)
1984
42.7 mm (1.7 in)
1985
50.5 mm (2.0 in)
1986
65.5 mm (2.6 in)
1987
90.2 mm (3.6 in)
1988
47.0 mm (1.9 in)
1989
102.9 mm (4.1 in)
1990
57.9 mm (2.3 in)
1991
63.5 mm (2.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Boyds 2 NW, 1919 to 1991. The record is 263.9 mm (10.4 in) in 1972, marked on the chart; the median year is 86.2 mm (3.4 in).
Wettest five days (Rx5day) at Boyds 2 NW by year
Year
Wettest five days (Rx5day)
1919
n/a
1920
77.5 mm (3.1 in)
1921
54.3 mm (2.1 in)
1922
96.8 mm (3.8 in)
1923
49.3 mm (1.9 in)
1924
109.5 mm (4.3 in)
1925
54.9 mm (2.2 in)
1926
83.3 mm (3.3 in)
1927
62.2 mm (2.4 in)
1928
83.1 mm (3.3 in)
1929
143.0 mm (5.6 in)
1930
41.9 mm (1.6 in)
1931
54.9 mm (2.2 in)
1932
113.6 mm (4.5 in)
1933
172.8 mm (6.8 in)
1934
132.8 mm (5.2 in)
1935
183.8 mm (7.2 in)
1936
89.7 mm (3.5 in)
1937
58.9 mm (2.3 in)
1938
77.5 mm (3.1 in)
1939
89.1 mm (3.5 in)
1940
79.4 mm (3.1 in)
1941
58.7 mm (2.3 in)
1942
152.8 mm (6.0 in)
1943
94.0 mm (3.7 in)
1944
68.4 mm (2.7 in)
1945
112.2 mm (4.4 in)
1946
115.8 mm (4.6 in)
1947
73.0 mm (2.9 in)
1948
89.7 mm (3.5 in)
1949
119.6 mm (4.7 in)
1953
116.6 mm (4.6 in)
1954
50.3 mm (2.0 in)
1955
130.3 mm (5.1 in)
1956
108.6 mm (4.3 in)
1957
62.2 mm (2.4 in)
1958
115.9 mm (4.6 in)
1959
68.3 mm (2.7 in)
1960
79.5 mm (3.1 in)
1961
59.4 mm (2.3 in)
1962
77.9 mm (3.1 in)
1963
108.6 mm (4.3 in)
1964
52.5 mm (2.1 in)
1965
80.8 mm (3.2 in)
1966
156.7 mm (6.2 in)
1967
114.6 mm (4.5 in)
1968
77.9 mm (3.1 in)
1969
122.1 mm (4.8 in)
1970
72.7 mm (2.9 in)
1971
153.2 mm (6.0 in)
1972
263.9 mm (10.4 in)
1973
107.5 mm (4.2 in)
1974
87.8 mm (3.5 in)
1975
213.0 mm (8.4 in)
1976
85.2 mm (3.4 in)
1977
79.8 mm (3.1 in)
1978
102.2 mm (4.0 in)
1979
128.3 mm (5.1 in)
1980
58.5 mm (2.3 in)
1981
72.7 mm (2.9 in)
1982
72.6 mm (2.9 in)
1983
98.9 mm (3.9 in)
1984
86.2 mm (3.4 in)
1985
69.4 mm (2.7 in)
1986
65.5 mm (2.6 in)
1987
129.1 mm (5.1 in)
1988
131.6 mm (5.2 in)
1989
137.2 mm (5.4 in)
1990
78.0 mm (3.1 in)
1991
63.5 mm (2.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Boyds 2 NW, 1919 to 1991. The record is 32 days in 1947, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Boyds 2 NW by year
Year
Longest dry spell (CDD)
1919
n/a
1920
27 days
1921
22 days
1922
18 days
1923
24 days
1924
17 days
1925
22 days
1926
15 days
1927
13 days
1928
18 days
1929
12 days
1930
12 days
1931
19 days
1932
15 days
1933
11 days
1934
16 days
1935
11 days
1936
16 days
1937
10 days
1938
13 days
1939
13 days
1940
14 days
1941
18 days
1942
17 days
1943
19 days
1944
17 days
1945
16 days
1946
20 days
1947
32 days
1948
14 days
1949
18 days
1953
20 days
1954
18 days
1955
22 days
1956
19 days
1957
18 days
1958
20 days
1959
16 days
1960
12 days
1961
15 days
1962
26 days
1963
32 days
1964
27 days
1965
20 days
1966
21 days
1967
14 days
1968
26 days
1969
17 days
1970
15 days
1971
16 days
1972
13 days
1973
14 days
1974
19 days
1975
13 days
1976
16 days
1977
23 days
1978
18 days
1979
16 days
1980
14 days
1981
19 days
1982
18 days
1983
17 days
1984
23 days
1985
13 days
1986
21 days
1987
27 days
1988
21 days
1989
25 days
1990
20 days
1991
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
51 years with a frost
Across 51 years with a frost, the median last spring frost at Boyds 2 NW falls on 21 April and the median first autumn frost on 20 October, which leaves a median of 185 days between them.
Fitted over all years, the growing season changes by +5.8 days per decade at this station.
Frost dates and growing season at Boyds 2 NW
Measure
Median, all years
Earliest period
Recent period (1957 to 1989)
Recent against earliest
Fitted trend
Last spring frost
21 April
n/a
16 April
n/a
-3.2 days per decade
First autumn frost
20 October
n/a
28 October
n/a
+2.5 days per decade
Growing days
185 days
n/a
192 days
n/a
+5.8 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
57 years, 1920 to 1990
A day with at least 60.0 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 188.9 mm (7.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Boyds 2 NW: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
60.0 mm (2.4 in)
5 years
81.6 mm (3.2 in)
10 years
100.0 mm (3.9 in)
25 years
129.3 mm (5.1 in)
50 years
156.4 mm (6.2 in)
100 years
188.9 mm (7.4 in)
Longer than the 57 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, 57 years of values from 1920 to 1990.
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: 205.0 mm (8.1 in) in 1972; 133.4 mm (5.3 in) in 1966; 131.1 mm (5.2 in) in 1971.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Boyds 2 NW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Boyds 2 NW 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.