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Data as of 2025-12-31
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Built 2026-10-17 (17 October 2026)

Somerville Threshold Days by Year

3 fixed thresholds counted per year at Somerville (ASN00086113): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Somerville Thresholds

  • Somerville: days with 10 mm (0.39 in) or more of precipitation in 50 years, most in 1916 with 37.
  • Somerville: days with 25 mm (0.98 in) or more of precipitation in 47 years, most in 1916 with 11.
  • Somerville: days with 50 mm (1.97 in) or more of precipitation in 11 years, most in 1901 with 2.
  • 3 fixed thresholds have at least one qualifying day at Somerville.
50 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Somerville Days per year at Somerville with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 37 in 1916. 0102030401901: 231902: 161903: 251904: 221905: 271906: 301907: 211908: 181909: 241910: 251911: 251912: 261913: 191914: 181915: 141916: 371917: 301918: 241919: 171920: 251921: 291922: 281923: 251924: 301925: 141926: 171927: 131928: 261929: 271930: 201931: 221932: 261933: 221934: 221935: 271936: 221937: 131938: 181939: 281940: 181941: 251942: 231943: 171944: 161945: 181946: 331947: 241948: 261949: 201950: 231901190619111916192119261931193619411946
Days per year at Somerville with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 37 in 1916.
Days with 10 mm (0.39 in) or more of precipitation per year at Somerville
YearDaysDecade average
19012322.9
19021622.9
19032522.9
19042222.9
19052722.9
19063022.9
19072122.9
19081822.9
19092422.9
19102523.5
19112523.5
19122623.5
19131923.5
19141823.5
19151423.5
19163723.5
19173023.5
19182423.5
19191723.5
19202523.4
19212923.4
19222823.4
19232523.4
19243023.4
19251423.4
19261723.4
19271323.4
19282623.4
19292723.4
19302022
19312222
19322622
19332222
19342222
19352722
19362222
19371322
19381822
19392822
19401822
19412522
19422322
19431722
19441622
19451822
19463322
19472422
19482622
19492022
19502323
First to last qualifying date each year at Somerville For each year, a bar from the first to the last day at Somerville meeting 10 mm (0.39 in). 1901: 3 January 1901 to 15 November 19011902: 6 January 1902 to 20 December 19021903: 7 January 1903 to 29 December 19031904: 15 January 1904 to 2 November 19041905: 13 February 1905 to 4 December 19051906: 11 March 1906 to 28 November 19061907: 5 March 1907 to 29 December 19071908: 10 January 1908 to 27 November 19081909: 4 January 1909 to 8 December 19091910: 15 January 1910 to 22 December 19101911: 11 February 1911 to 16 December 19111912: 8 February 1912 to 26 December 19121913: 5 February 1913 to 23 December 19131914: 12 January 1914 to 26 December 19141915: 6 January 1915 to 23 November 19151916: 28 January 1916 to 12 December 19161917: 22 January 1917 to 31 December 19171918: 14 January 1918 to 26 December 19181919: 7 January 1919 to 28 December 19191920: 27 January 1920 to 17 December 19201921: 2 January 1921 to 26 November 19211922: 22 February 1922 to 27 December 19221923: 19 January 1923 to 26 December 19231924: 12 January 1924 to 27 December 19241925: 13 January 1925 to 20 November 19251926: 7 January 1926 to 17 November 19261927: 24 February 1927 to 4 November 19271928: 18 January 1928 to 23 December 19281929: 30 January 1929 to 28 December 19291930: 8 February 1930 to 25 December 19301931: 19 January 1931 to 17 November 19311932: 5 February 1932 to 24 December 19321933: 21 February 1933 to 15 December 19331934: 9 January 1934 to 1 December 19341935: 5 January 1935 to 21 December 19351936: 20 February 1936 to 18 December 19361937: 25 January 1937 to 18 October 19371938: 15 January 1938 to 4 November 19381939: 17 February 1939 to 5 December 19391940: 6 January 1940 to 20 December 19401941: 4 January 1941 to 5 December 19411942: 20 January 1942 to 19 December 19421943: 16 January 1943 to 18 November 19431944: 23 January 1944 to 23 December 19441945: 16 January 1945 to 27 December 19451946: 17 January 1946 to 29 December 19461947: 1 March 1947 to 25 December 19471948: 5 January 1948 to 28 December 19481949: 16 January 1949 to 18 November 19491950: 2 February 1950 to 20 December 195019011908191519221929193619431950JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Somerville meeting 10 mm (0.39 in).
First to last qualifying date each year at Somerville
YearFirst dateLast date
19011901-01-031901-11-15
19021902-01-061902-12-20
19031903-01-071903-12-29
19041904-01-151904-11-02
19051905-02-131905-12-04
19061906-03-111906-11-28
19071907-03-051907-12-29
19081908-01-101908-11-27
19091909-01-041909-12-08
19101910-01-151910-12-22
19111911-02-111911-12-16
19121912-02-081912-12-26
19131913-02-051913-12-23
19141914-01-121914-12-26
19151915-01-061915-11-23
19161916-01-281916-12-12
19171917-01-221917-12-31
19181918-01-141918-12-26
19191919-01-071919-12-28
19201920-01-271920-12-17
19211921-01-021921-11-26
19221922-02-221922-12-27
19231923-01-191923-12-26
19241924-01-121924-12-27
19251925-01-131925-11-20
19261926-01-071926-11-17
19271927-02-241927-11-04
19281928-01-181928-12-23
19291929-01-301929-12-28
19301930-02-081930-12-25
19311931-01-191931-11-17
19321932-02-051932-12-24
19331933-02-211933-12-15
19341934-01-091934-12-01
19351935-01-051935-12-21
19361936-02-201936-12-18
19371937-01-251937-10-18
19381938-01-151938-11-04
19391939-02-171939-12-05
19401940-01-061940-12-20
19411941-01-041941-12-05
19421942-01-201942-12-19
19431943-01-161943-11-18
19441944-01-231944-12-23
19451945-01-161945-12-27
19461946-01-171946-12-29
19471947-03-011947-12-25
19481948-01-051948-12-28
19491949-01-161949-11-18
19501950-02-021950-12-20

Every Fixed Threshold

Fixed thresholds at Somerville
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain5037191623
25 mm (0.98 in): Days with 25 mm or more rain471119166
50 mm (1.97 in): Days with 50 mm or more rain11219012

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1901.

Download the Data

  • Data for Somerville 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). Threshold counts are computed by this site.

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