Roberts Dam Weather Records (USC00196915)

Record envelope, standing records and threshold days for Roberts Dam (USC00196915), Massachusetts, United States, with 42 years of record.

Key Facts for Roberts Dam

Roberts Dam (USC00196915) is a weather station in Massachusetts, United States at 42.37 latitude and -71.27 longitude, 23 m (75 ft) above sea level.
The station reports from 1889 to 1930, 42 years of record.
1,464 records set at Roberts Dam still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Roberts Dam set a daily record precipitation of 15.7 mm (0.6 in) on 18 April 1930.

About the Station

Location: Massachusetts, United States, 42.37 latitude, -71.27 longitude.
Elevation: 23 m (75 ft).
Period of record: 1889 to 1930, 42 years.
Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Roberts Dam. 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 Roberts Dam, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	14.4 C (57.9 F)	-16.7 C (1.9 F)	n/a	n/a
Feb	15.6 C (60.1 F)	-23.3 C (-9.9 F)	n/a	n/a
Mar	25.6 C (78.1 F)	-15.6 C (3.9 F)	n/a	n/a
Apr	32.2 C (90.0 F)	-6.7 C (19.9 F)	n/a	n/a
May	31.1 C (88.0 F)	1.1 C (34.0 F)	n/a	n/a
Jun	35.6 C (96.1 F)	7.8 C (46.0 F)	n/a	n/a
Jul	35.6 C (96.1 F)	10.0 C (50.0 F)	n/a	n/a
Aug	36.7 C (98.1 F)	10.0 C (50.0 F)	n/a	n/a
Sep	33.3 C (91.9 F)	-1.1 C (30.0 F)	n/a	n/a
Oct	31.1 C (88.0 F)	-2.2 C (28.0 F)	n/a	n/a
Nov	25.6 C (78.1 F)	-12.2 C (10.0 F)	n/a	n/a
Dec	16.7 C (62.1 F)	-22.2 C (-8.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Roberts Dam still stand. 1922 holds the most, with 234.

Wettest Day of Each Month

Sep: 153.7 mm (6.1 in)

The wettest day on record for each calendar month at Roberts Dam. The most was 153.7 mm (6.1 in) on 4 September 1905.

Record daily precipitation for each month at Roberts Dam
Month	Record daily precipitation (mm)	Date
Jan	51.1 mm (2.0 in)	13 January 1915
Feb	65.0 mm (2.6 in)	23 February 1900
Mar	143.8 mm (5.7 in)	20 March 1920
Apr	63.2 mm (2.5 in)	17 April 1929
May	54.6 mm (2.1 in)	5 May 1922
Jun	71.1 mm (2.8 in)	20 June 1922
Jul	75.4 mm (3.0 in)	28 July 1911
Aug	77.0 mm (3.0 in)	2 August 1927
Sep	153.7 mm (6.1 in)	4 September 1905
Oct	96.0 mm (3.8 in)	14 October 1895
Nov	63.0 mm (2.5 in)	5 November 1927
Dec	52.3 mm (2.1 in)	15 December 1897

Period of Record Coverage

1890 to 1929

17 years of record at Roberts Dam, 1890 to 1929. 17 years have data for under 90 percent of days and are left out of rankings: 1890, 1903, 1907, 1909, 1910, 1911, 1915, 1918 and others.

Days with data per year at Roberts Dam
Year	Days with data	Share of year	Complete
1890	10	3%	No
1903	31	8%	No
1907	60	16%	No
1909	30	8%	No
1910	49	13%	No
1911	58	16%	No
1915	59	16%	No
1918	61	17%	No
1921	68	19%	No
1922	291	80%	No
1923	281	77%	No
1924	317	87%	No
1925	271	74%	No
1926	217	59%	No
1927	247	68%	No
1928	130	36%	No
1929	103	28%	No

Latest Records

Latest records at Roberts Dam
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 April 1930	Roberts Dam, US	daily rain	15.7 mm (0.6 in)	7.8 mm (0.31 in)	12 years	14 of 100 (Routine)
26 March 1930	Roberts Dam, US	daily rain	23.6 mm (0.9 in)	1.0 mm (0.04 in)	16 years	9 of 100 (Routine)
14 February 1930	Roberts Dam, US	daily rain (Tie)	25.4 mm (1.0 in)	tie	29 years	3 of 100 (Routine)
14 January 1930	Roberts Dam, US	daily rain	15.7 mm (0.6 in)	0.7 mm (0.03 in)	26 years	11 of 100 (Routine)
20 December 1929	Roberts Dam, US	daily rain	12.7 mm (0.5 in)	3.3 mm (0.13 in)	29 years	15 of 100 (Routine)
2 October 1929	Roberts Dam, US	daily rain	58.4 mm (2.3 in)	45.2 mm (1.8 in)	18 years	42 of 100 (Notable)
21 April 1929	Roberts Dam, US	daily rain	31.8 mm (1.3 in)	7.2 mm (0.28 in)	35 years	20 of 100 (Routine)
17 April 1929	Roberts Dam, US	monthly rain	63.2 mm (2.5 in)	5.5 mm (0.22 in)	24 years	26 of 100 (Routine)
6 March 1929	Roberts Dam, US	daily rain	33.5 mm (1.3 in)	0.5 mm (0.02 in)	8 years	6 of 100 (Routine)
23 October 1928	Roberts Dam, US	daily rain	57.2 mm (2.3 in)	43.0 mm (1.7 in)	18 years	41 of 100 (Notable)
20 September 1928	Roberts Dam, US	daily rain	57.2 mm (2.3 in)	22.4 mm (0.9 in)	33 years	27 of 100 (Routine)
20 July 1928	Roberts Dam, US	daily rain	9.7 mm (0.38 in)	0.6 mm (0.02 in)	10 years	7 of 100 (Routine)
6 July 1928	Roberts Dam, US	daily rain	20.1 mm (0.8 in)	2.3 mm (0.09 in)	6 years	6 of 100 (Routine)
21 May 1928	Roberts Dam, US	daily rain	27.7 mm (1.1 in)	12.5 mm (0.5 in)	37 years	27 of 100 (Routine)
24 April 1928	Roberts Dam, US	daily rain	24.4 mm (1.0 in)	1.3 mm (0.05 in)	7 years	7 of 100 (Routine)
20 January 1928	Roberts Dam, US	daily rain	15.0 mm (0.6 in)	2.3 mm (0.09 in)	37 years	17 of 100 (Routine)

Extremes by Year

1889 to 1930

Yearly extremes at Roberts Dam: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	36.7 C (98.1 F)	1924	32.2 C (90.0 F)	17
Coldest night (TNn)	-23.3 C (-9.9 F)	1922	-16.7 C (1.9 F)	11
Wettest day (Rx1day)	153.7 mm (6.1 in)	1905	52.2 mm (2.1 in)	42
Wettest five days (Rx5day)	169.9 mm (6.7 in)	1922	74.2 mm (2.9 in)	42
Longest dry spell (CDD)	36 days	1915	15 days	42

Hottest day (TXx)

The hottest day of the year at Roberts Dam, 1889 to 1930. The record is 36.7 C (98.1 F) in 1924, marked on the chart; the median year is 32.2 C (90.0 F).

Hottest day (TXx) at Roberts Dam by year
Year	Hottest day (TXx)
1889	n/a
1890	35.6 C (96.1 F)
1891	n/a
1892	n/a
1893	n/a
1894	n/a
1895	n/a
1896	n/a
1897	n/a
1898	n/a
1899	n/a
1900	n/a
1901	n/a
1902	n/a
1903	20.0 C (68.0 F)
1904	n/a
1905	n/a
1906	n/a
1907	22.2 C (72.0 F)
1908	n/a
1909	16.7 C (62.1 F)
1910	11.1 C (52.0 F)
1911	10.0 C (50.0 F)
1912	n/a
1913	n/a
1914	n/a
1915	24.4 C (75.9 F)
1916	n/a
1917	n/a
1918	26.7 C (80.1 F)
1919	n/a
1920	n/a
1921	33.3 C (91.9 F)
1922	33.3 C (91.9 F)
1923	35.6 C (96.1 F)
1924	36.7 C (98.1 F)
1925	34.4 C (93.9 F)
1926	32.2 C (90.0 F)
1927	32.2 C (90.0 F)
1928	27.8 C (82.0 F)
1929	32.2 C (90.0 F)
1930	n/a

Coldest night (TNn)

The coldest night of the year at Roberts Dam, 1889 to 1930. The record is -23.3 C (-9.9 F) in 1922, marked on the chart; the median year is -16.7 C (1.9 F).

Coldest night (TNn) at Roberts Dam by year
Year	Coldest night (TNn)
1889	n/a
1890	-15.6 C (3.9 F)
1891	n/a
1892	n/a
1893	n/a
1894	n/a
1895	n/a
1896	n/a
1897	n/a
1898	n/a
1899	n/a
1900	n/a
1901	n/a
1902	n/a
1903	n/a
1904	n/a
1905	n/a
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	-2.2 C (28.0 F)
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	-22.2 C (-8.0 F)
1922	-23.3 C (-9.9 F)
1923	-16.7 C (1.9 F)
1924	-16.7 C (1.9 F)
1925	-16.7 C (1.9 F)
1926	-17.8 C (0.0 F)
1927	-11.1 C (12.0 F)
1928	-16.7 C (1.9 F)
1929	-12.2 C (10.0 F)
1930	n/a

Wettest day (Rx1day)

The wettest day of the year at Roberts Dam, 1889 to 1930. The record is 153.7 mm (6.1 in) in 1905, marked on the chart; the median year is 52.2 mm (2.1 in).

Wettest day (Rx1day) at Roberts Dam by year
Year	Wettest day (Rx1day)
1889	14.7 mm (0.6 in)
1890	50.3 mm (2.0 in)
1891	50.8 mm (2.0 in)
1892	43.7 mm (1.7 in)
1893	49.0 mm (1.9 in)
1894	35.6 mm (1.4 in)
1895	96.0 mm (3.8 in)
1896	48.8 mm (1.9 in)
1897	52.3 mm (2.1 in)
1898	50.5 mm (2.0 in)
1899	50.8 mm (2.0 in)
1900	65.0 mm (2.6 in)
1901	75.2 mm (3.0 in)
1902	47.0 mm (1.9 in)
1903	54.9 mm (2.2 in)
1904	92.5 mm (3.6 in)
1905	153.7 mm (6.1 in)
1906	55.6 mm (2.2 in)
1907	50.8 mm (2.0 in)
1908	43.2 mm (1.7 in)
1909	48.3 mm (1.9 in)
1910	44.5 mm (1.8 in)
1911	75.4 mm (3.0 in)
1912	48.3 mm (1.9 in)
1913	39.1 mm (1.5 in)
1914	42.9 mm (1.7 in)
1915	73.9 mm (2.9 in)
1916	45.5 mm (1.8 in)
1917	57.2 mm (2.3 in)
1918	53.6 mm (2.1 in)
1919	55.9 mm (2.2 in)
1920	143.8 mm (5.7 in)
1921	52.1 mm (2.1 in)
1922	71.1 mm (2.8 in)
1923	60.2 mm (2.4 in)
1924	94.2 mm (3.7 in)
1925	32.3 mm (1.3 in)
1926	61.0 mm (2.4 in)
1927	77.0 mm (3.0 in)
1928	57.2 mm (2.3 in)
1929	63.2 mm (2.5 in)
1930	30.5 mm (1.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Roberts Dam, 1889 to 1930. The record is 169.9 mm (6.7 in) in 1922, marked on the chart; the median year is 74.2 mm (2.9 in).

Wettest five days (Rx5day) at Roberts Dam by year
Year	Wettest five days (Rx5day)
1889	21.3 mm (0.8 in)
1890	74.4 mm (2.9 in)
1891	80.8 mm (3.2 in)
1892	67.1 mm (2.6 in)
1893	118.4 mm (4.7 in)
1894	65.5 mm (2.6 in)
1895	73.9 mm (2.9 in)
1896	69.6 mm (2.7 in)
1897	68.3 mm (2.7 in)
1898	63.4 mm (2.5 in)
1899	77.2 mm (3.0 in)
1900	58.7 mm (2.3 in)
1901	75.4 mm (3.0 in)
1902	44.7 mm (1.8 in)
1903	90.4 mm (3.6 in)
1904	130.4 mm (5.1 in)
1905	163.9 mm (6.5 in)
1906	71.7 mm (2.8 in)
1907	70.8 mm (2.8 in)
1908	62.3 mm (2.5 in)
1909	60.9 mm (2.4 in)
1910	63.6 mm (2.5 in)
1911	108.7 mm (4.3 in)
1912	85.2 mm (3.4 in)
1913	67.1 mm (2.6 in)
1914	67.6 mm (2.7 in)
1915	128.3 mm (5.1 in)
1916	66.3 mm (2.6 in)
1917	75.7 mm (3.0 in)
1918	94.8 mm (3.7 in)
1919	73.2 mm (2.9 in)
1920	83.5 mm (3.3 in)
1921	134.9 mm (5.3 in)
1922	169.9 mm (6.7 in)
1923	96.7 mm (3.8 in)
1924	54.9 mm (2.2 in)
1925	54.4 mm (2.1 in)
1926	74.7 mm (2.9 in)
1927	115.1 mm (4.5 in)
1928	99.9 mm (3.9 in)
1929	101.4 mm (4.0 in)
1930	39.9 mm (1.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Roberts Dam, 1889 to 1930. The record is 36 days in 1915, marked on the chart; the median year is 15 days.

Longest dry spell (CDD) at Roberts Dam by year
Year	Longest dry spell (CDD)
1889	4 days
1890	14 days
1891	14 days
1892	17 days
1893	13 days
1894	30 days
1895	20 days
1896	15 days
1897	11 days
1898	7 days
1899	13 days
1900	12 days
1901	6 days
1902	11 days
1903	9 days
1904	16 days
1905	11 days
1906	10 days
1907	11 days
1908	21 days
1909	14 days
1910	21 days
1911	26 days
1912	34 days
1913	15 days
1914	25 days
1915	36 days
1916	22 days
1917	21 days
1918	19 days
1919	19 days
1920	14 days
1921	19 days
1922	21 days
1923	22 days
1924	18 days
1925	17 days
1926	10 days
1927	15 days
1928	17 days
1929	15 days
1930	9 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.

Download the Data

Data for Roberts Dam standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Roberts Dam 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).