Daily records
Page built 2026-10-19
Data as of 2025-12-31
Search
Built 2026-10-19 (19 October 2026)

Somerville 10N Threshold Days by Year (USC00408450)

6 fixed thresholds counted per year at Somerville 10N (USC00408450): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Somerville 10N Thresholds

  • Somerville 10N: days with 10 mm (0.39 in) or more of precipitation in 25 years, most in 2009 with 51.
  • Somerville 10N: days with 25 mm (0.98 in) or more of precipitation in 25 years, most in 2014 with 22.
  • Somerville 10N: days with 50 mm (1.97 in) or more of precipitation in 25 years, most in 2001 with 7.
  • Somerville 10N: days with 10 cm (3.9 in) or more of snowfall in 7 years, most in 2003 with 1.
  • 6 fixed thresholds have at least one qualifying day at Somerville 10N.
25 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Somerville 10N Days per year at Somerville 10N with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 51 in 2009. 02040601997: 371999: 272000: 282001: 402004: 342005: 292006: 412007: 352008: 502009: 512010: 362011: 432012: 342013: 402014: 452015: 432016: 422017: 392018: 502019: 392020: 462021: 412022: 412023: 372025: 37199720012006200920122015201820212025
Days per year at Somerville 10N with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 51 in 2009.
Days with 10 mm (0.39 in) or more of precipitation per year at Somerville 10N
YearDaysDecade average
19973732
19992732
20002838.5
20014038.5
20043438.5
20052938.5
20064138.5
20073538.5
20085038.5
20095138.5
20103641.1
20114341.1
20123441.1
20134041.1
20144541.1
20154341.1
20164241.1
20173941.1
20185041.1
20193941.1
20204640.4
20214140.4
20224140.4
20233740.4
20253740.4
First to last qualifying date each year at Somerville 10N For each year, a bar from the first to the last day at Somerville 10N meeting 10 mm (0.39 in). 1997: 5 January 1997 to 24 December 19971999: 2 January 1999 to 12 December 19992000: 4 January 2000 to 16 December 20002001: 19 January 2001 to 23 December 20012004: 18 January 2004 to 6 December 20042005: 2 January 2005 to 15 December 20052006: 11 January 2006 to 25 December 20062007: 5 January 2007 to 28 December 20072008: 8 January 2008 to 28 December 20082009: 6 January 2009 to 25 December 20092010: 17 January 2010 to 12 December 20102011: 10 January 2011 to 27 December 20112012: 11 January 2012 to 29 December 20122013: 1 January 2013 to 22 December 20132014: 10 January 2014 to 6 December 20142015: 2 February 2015 to 29 December 20152016: 10 January 2016 to 29 December 20162017: 1 January 2017 to 23 December 20172018: 9 January 2018 to 31 December 20182019: 1 January 2019 to 30 December 20192020: 3 January 2020 to 31 December 20202021: 1 January 2021 to 30 December 20212022: 2 January 2022 to 15 December 20222023: 3 January 2023 to 25 December 20232025: 6 January 2025 to 19 December 20251997200420082012201620202025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Somerville 10N meeting 10 mm (0.39 in).
First to last qualifying date each year at Somerville 10N
YearFirst dateLast date
19971997-01-051997-12-24
19991999-01-021999-12-12
20002000-01-042000-12-16
20012001-01-192001-12-23
20042004-01-182004-12-06
20052005-01-022005-12-15
20062006-01-112006-12-25
20072007-01-052007-12-28
20082008-01-082008-12-28
20092009-01-062009-12-25
20102010-01-172010-12-12
20112011-01-102011-12-27
20122012-01-112012-12-29
20132013-01-012013-12-22
20142014-01-102014-12-06
20152015-02-022015-12-29
20162016-01-102016-12-29
20172017-01-012017-12-23
20182018-01-092018-12-31
20192019-01-012019-12-30
20202020-01-032020-12-31
20212021-01-012021-12-30
20222022-01-022022-12-15
20232023-01-032023-12-25
20252025-01-062025-12-19

Every Fixed Threshold

Fixed thresholds at Somerville 10N
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2551200937
25 mm (0.98 in): Days with 25 mm or more rain2522201414
50 mm (1.97 in): Days with 50 mm or more rain25720016
100 mm (3.94 in): Days with 100 mm or more rain6220252
10 cm (3.9 in): Days with 10 cm or more snowfall7120031
25 cm (9.8 in): Days with 25 cm or more snowfall1120091

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1997.

Download the Data

  • Data for Somerville 10N 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). Threshold counts are computed by this site.

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