Record envelope, standing records and threshold days for Westboro (USC00199080), Massachusetts, United States, with 33 years of record.
Key Facts for Westboro
Westboro (USC00199080) is a weather station in Massachusetts, United States at 42.27 latitude and -71.63 longitude, 91 m (298 ft) above sea level.
The station reports from 1893 to 1925, 33 years of record.
1,464 records set at Westboro still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Westboro set a monthly record daily precipitation of 101.6 mm (4.0 in) on 6 December 1925.
About the Station
Location: Massachusetts, United States, 42.27 latitude, -71.63 longitude.
Elevation: 91 m (298 ft).
Period of record: 1893 to 1925, 33 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 Westboro. 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 Westboro, 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)
-29.4 C (-20.9 F)
n/a
n/a
Feb
15.0 C (59.0 F)
-28.9 C (-20.0 F)
n/a
n/a
Mar
27.8 C (82.0 F)
-19.4 C (-2.9 F)
n/a
n/a
Apr
31.1 C (88.0 F)
-12.2 C (10.0 F)
n/a
n/a
May
36.7 C (98.1 F)
-3.3 C (26.1 F)
n/a
n/a
Jun
35.6 C (96.1 F)
1.7 C (35.1 F)
n/a
n/a
Jul
40.6 C (105.1 F)
4.4 C (39.9 F)
n/a
n/a
Aug
36.7 C (98.1 F)
3.9 C (39.0 F)
n/a
n/a
Sep
35.0 C (95.0 F)
-3.9 C (25.0 F)
n/a
n/a
Oct
30.6 C (87.1 F)
-8.9 C (16.0 F)
n/a
n/a
Nov
24.4 C (75.9 F)
-16.1 C (3.0 F)
n/a
n/a
Dec
20.0 C (68.0 F)
-25.0 C (-13.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Westboro still stand. 1896 holds the most, with 77.
Standing records at Westboro by the year they were set
Year set
Standing records
1893
54
1894
63
1895
73
1896
77
1897
45
1898
62
1899
52
1900
51
1901
36
1902
30
1903
68
1904
55
1905
40
1906
39
1907
43
1908
38
1909
38
1910
31
1911
55
1912
38
1913
56
1914
53
1915
20
1916
45
1917
39
1918
50
1919
42
1920
26
1921
37
1922
27
1923
42
1924
39
Wettest Day of Each Month
Oct: 209.6 mm (8.3 in)
The wettest day on record for each calendar month at Westboro. The most was 209.6 mm (8.3 in) on 14 October 1895.
Record daily precipitation for each month at Westboro
Month
Record daily precipitation (mm)
Date
Jan
53.3 mm (2.1 in)
4 January 1919
Feb
99.1 mm (3.9 in)
7 February 1920
Mar
95.3 mm (3.8 in)
16 March 1900
Apr
118.1 mm (4.6 in)
29 April 1904
May
114.3 mm (4.5 in)
29 May 1906
Jun
121.9 mm (4.8 in)
21 June 1922
Jul
172.2 mm (6.8 in)
2 July 1921
Aug
87.6 mm (3.4 in)
3 August 1894
Sep
147.8 mm (5.8 in)
5 September 1905
Oct
209.6 mm (8.3 in)
14 October 1895
Nov
134.1 mm (5.3 in)
25 November 1923
Dec
101.6 mm (4.0 in)
6 December 1925
Period of Record Coverage
1893 to 1924
Complete yearUnder 90 percent of days
32 years of record at Westboro, 1893 to 1924. 2 years have data for under 90 percent of days and are left out of rankings: 1901, 1915.
Cooler than the station meanWarmer than the station mean
One stripe for each of 30 complete years at Westboro, 1893 to 1924. Blue stripes are years cooler than the station's own mean of 9.7 C (49.5 F); red stripes are warmer. The coolest year was 1904, at 7.7 C (45.9 F), and the warmest was 1913, at 11.6 C (52.9 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Westboro as warming stripes, 1893 to 1924
Year
Annual mean temperature
Difference from the station mean
1893
8.4 C
-1.29 C
1894
9.6 C
-0.09 C
1895
9.4 C
-0.28 C
1896
9.3 C
-0.45 C
1897
9.6 C
-0.11 C
1898
9.7 C
0.00 C
1899
9.4 C
-0.28 C
1900
10.0 C
+0.29 C
1901
9.3 C
-0.38 C
1902
9.7 C
-0.01 C
1903
9.3 C
-0.39 C
1904
7.7 C
-1.98 C
1905
9.0 C
-0.74 C
1906
9.7 C
-0.01 C
1907
8.7 C
-1.01 C
1908
10.1 C
+0.38 C
1909
10.0 C
+0.26 C
1910
10.1 C
+0.44 C
1911
10.5 C
+0.80 C
1912
10.1 C
+0.38 C
1913
11.6 C
+1.92 C
1914
10.5 C
+0.81 C
1916
10.5 C
+0.82 C
1918
9.8 C
+0.10 C
1919
10.5 C
+0.77 C
1920
9.3 C
-0.44 C
1921
11.3 C
+1.60 C
1922
9.9 C
+0.22 C
1923
9.4 C
-0.27 C
1924
8.8 C
-0.94 C
The annual mean temperature here has risen by 0.32 C (0.01 to 0.62) per decade over 1893 to 1924. In Fahrenheit: 0.57 F (0.02 to 1.11) per decade. The slope is a straight line fitted to 30 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Westboro
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.32 C (0.01 to 0.62) per decade
0.57 F (0.02 to 1.11) per decade
1893 to 1924
30
Rise
Mean daily maximum
-0.2 C (-0.6 to 0.2) per decade
-0.4 F (-1.1 to 0.4) per decade
1893 to 1924
30
Not clearly different from zero
Mean daily minimum
0.8 C (0.4 to 1.2) per decade
1.5 F (0.8 to 2.2) per decade
1893 to 1924
30
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
1893 to 1925
Yearly extremes at Westboro: 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
35.0 C (95.0 F)
32
Coldest night (TNn)
-29.4 C (-20.9 F)
1912
-23.0 C (-9.5 F)
32
Wettest day (Rx1day)
209.6 mm (8.3 in)
1895
84.1 mm (3.3 in)
33
Wettest five days (Rx5day)
210.6 mm (8.3 in)
1895
98.8 mm (3.9 in)
33
Longest dry spell (CDD)
34 days
1924
18 days
33
Hottest day (TXx)
The hottest day of the year at Westboro, 1893 to 1925. The record is 40.6 C (105.1 F) in 1911, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Westboro by year
Year
Hottest day (TXx)
1893
35.6 C (96.1 F)
1894
35.0 C (95.0 F)
1895
35.0 C (95.0 F)
1896
35.0 C (95.0 F)
1897
35.0 C (95.0 F)
1898
35.6 C (96.1 F)
1899
33.9 C (93.0 F)
1900
36.1 C (97.0 F)
1901
36.7 C (98.1 F)
1902
33.3 C (91.9 F)
1903
35.0 C (95.0 F)
1904
34.4 C (93.9 F)
1905
34.4 C (93.9 F)
1906
33.9 C (93.0 F)
1907
35.6 C (96.1 F)
1908
36.7 C (98.1 F)
1909
36.1 C (97.0 F)
1910
35.0 C (95.0 F)
1911
40.6 C (105.1 F)
1912
37.2 C (99.0 F)
1913
36.1 C (97.0 F)
1914
35.0 C (95.0 F)
1915
32.2 C (90.0 F)
1916
35.0 C (95.0 F)
1917
36.7 C (98.1 F)
1918
34.4 C (93.9 F)
1919
34.4 C (93.9 F)
1920
30.0 C (86.0 F)
1921
35.0 C (95.0 F)
1922
34.4 C (93.9 F)
1923
32.8 C (91.0 F)
1924
31.1 C (88.0 F)
1925
n/a
Coldest night (TNn)
The coldest night of the year at Westboro, 1893 to 1925. The record is -29.4 C (-20.9 F) in 1912, marked on the chart; the median year is -23.0 C (-9.5 F).
Coldest night (TNn) at Westboro by year
Year
Coldest night (TNn)
1893
-24.4 C (-11.9 F)
1894
-26.1 C (-15.0 F)
1895
-22.8 C (-9.0 F)
1896
-25.6 C (-14.1 F)
1897
-21.7 C (-7.1 F)
1898
-26.1 C (-15.0 F)
1899
-24.4 C (-11.9 F)
1900
-20.6 C (-5.1 F)
1901
-22.8 C (-9.0 F)
1902
-25.0 C (-13.0 F)
1903
-24.4 C (-11.9 F)
1904
-27.8 C (-18.0 F)
1905
-22.8 C (-9.0 F)
1906
-19.4 C (-2.9 F)
1907
-26.7 C (-16.1 F)
1908
-21.7 C (-7.1 F)
1909
-23.9 C (-11.0 F)
1910
-22.8 C (-9.0 F)
1911
-20.0 C (-4.0 F)
1912
-29.4 C (-20.9 F)
1913
-18.9 C (-2.0 F)
1914
-25.6 C (-14.1 F)
1915
-10.0 C (14.0 F)
1916
-24.4 C (-11.9 F)
1917
-23.3 C (-9.9 F)
1918
-24.4 C (-11.9 F)
1919
-20.6 C (-5.1 F)
1920
-28.9 C (-20.0 F)
1921
-21.1 C (-6.0 F)
1922
-22.2 C (-8.0 F)
1923
-22.2 C (-8.0 F)
1924
-21.7 C (-7.1 F)
1925
n/a
Wettest day (Rx1day)
The wettest day of the year at Westboro, 1893 to 1925. The record is 209.6 mm (8.3 in) in 1895, marked on the chart; the median year is 84.1 mm (3.3 in).
Wettest day (Rx1day) at Westboro by year
Year
Wettest day (Rx1day)
1893
87.4 mm (3.4 in)
1894
87.6 mm (3.4 in)
1895
209.6 mm (8.3 in)
1896
84.1 mm (3.3 in)
1897
78.0 mm (3.1 in)
1898
85.1 mm (3.4 in)
1899
50.8 mm (2.0 in)
1900
95.3 mm (3.8 in)
1901
81.8 mm (3.2 in)
1902
57.2 mm (2.3 in)
1903
78.7 mm (3.1 in)
1904
118.1 mm (4.6 in)
1905
147.8 mm (5.8 in)
1906
114.3 mm (4.5 in)
1907
87.6 mm (3.4 in)
1908
57.2 mm (2.3 in)
1909
51.8 mm (2.0 in)
1910
67.3 mm (2.6 in)
1911
55.9 mm (2.2 in)
1912
59.7 mm (2.4 in)
1913
78.7 mm (3.1 in)
1914
82.6 mm (3.3 in)
1915
94.0 mm (3.7 in)
1916
67.1 mm (2.6 in)
1917
72.4 mm (2.9 in)
1918
89.4 mm (3.5 in)
1919
73.7 mm (2.9 in)
1920
99.1 mm (3.9 in)
1921
172.2 mm (6.8 in)
1922
121.9 mm (4.8 in)
1923
134.1 mm (5.3 in)
1924
77.7 mm (3.1 in)
1925
101.6 mm (4.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Westboro, 1893 to 1925. The record is 210.6 mm (8.3 in) in 1895, marked on the chart; the median year is 98.8 mm (3.9 in).
Wettest five days (Rx5day) at Westboro by year
Year
Wettest five days (Rx5day)
1893
103.9 mm (4.1 in)
1894
88.9 mm (3.5 in)
1895
210.6 mm (8.3 in)
1896
125.0 mm (4.9 in)
1897
88.4 mm (3.5 in)
1898
87.9 mm (3.5 in)
1899
67.3 mm (2.6 in)
1900
120.7 mm (4.8 in)
1901
81.8 mm (3.2 in)
1902
73.0 mm (2.9 in)
1903
125.0 mm (4.9 in)
1904
121.4 mm (4.8 in)
1905
157.2 mm (6.2 in)
1906
118.1 mm (4.6 in)
1907
109.2 mm (4.3 in)
1908
64.3 mm (2.5 in)
1909
76.2 mm (3.0 in)
1910
67.3 mm (2.6 in)
1911
72.4 mm (2.9 in)
1912
85.1 mm (3.4 in)
1913
104.1 mm (4.1 in)
1914
83.4 mm (3.3 in)
1915
123.7 mm (4.9 in)
1916
67.1 mm (2.6 in)
1917
89.9 mm (3.5 in)
1918
98.8 mm (3.9 in)
1919
86.4 mm (3.4 in)
1920
125.0 mm (4.9 in)
1921
173.7 mm (6.8 in)
1922
141.0 mm (5.6 in)
1923
134.1 mm (5.3 in)
1924
85.3 mm (3.4 in)
1925
104.1 mm (4.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Westboro, 1893 to 1925. The record is 34 days in 1924, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Westboro by year
Year
Longest dry spell (CDD)
1893
11 days
1894
18 days
1895
15 days
1896
18 days
1897
20 days
1898
10 days
1899
12 days
1900
22 days
1901
18 days
1902
15 days
1903
17 days
1904
18 days
1905
15 days
1906
16 days
1907
12 days
1908
22 days
1909
13 days
1910
20 days
1911
18 days
1912
24 days
1913
18 days
1914
30 days
1915
16 days
1916
13 days
1917
28 days
1918
18 days
1919
21 days
1920
26 days
1921
17 days
1922
22 days
1923
16 days
1924
34 days
1925
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
30 years with a frost
Across 30 years with a frost, the median last spring frost at Westboro falls on 3 May and the median first autumn frost on 8 October, which leaves a median of 163 days between them.
Fitted over all years, the growing season changes by +7.3 days per decade at this station.
Frost dates and growing season at Westboro
Measure
Median, all years
Earliest period
Recent period (1893 to 1924)
Recent against earliest
Fitted trend
Last spring frost
3 May
n/a
3 May
n/a
-6.3 days per decade
First autumn frost
8 October
n/a
8 October
n/a
+1.0 days per decade
Growing days
163 days
n/a
163 days
n/a
+7.3 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.
Download the Data
Data for Westboro standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Westboro 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.