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Built 2026-10-19 (19 October 2026)

Chalmers 5 W Threshold Days by Year (USC00121417)

15 fixed thresholds counted per year at Chalmers 5 W (USC00121417): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chalmers 5 W Thresholds

  • Chalmers 5 W: days with 10 mm (0.39 in) or more of precipitation in 35 years, most in 2006 with 47.
  • Chalmers 5 W: days with 25 mm (0.98 in) or more of precipitation in 35 years, most in 2003 with 17.
  • Chalmers 5 W: days with 50 mm (1.97 in) or more of precipitation in 29 years, most in 2003 with 5.
  • Chalmers 5 W: days with 10 cm (3.9 in) or more of snowfall in 21 years, most in 1999 with 3.
  • 15 fixed thresholds have at least one qualifying day at Chalmers 5 W.
17 years with a qualifying day
Days at or above 30 C (86 F) per year at Chalmers 5 W Days per year at Chalmers 5 W with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 68 in 2012. 0204060802009: 192010: 532011: 452012: 682013: 292014: 152015: 202016: 482017: 332018: 482019: 472021: 562022: 462023: 432024: 442025: 612026: 41200920112013201520172019202220242026
Days per year at Chalmers 5 W with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 68 in 2012.
Days at or above 30 C (86 F) per year at Chalmers 5 W
YearDaysDecade average
20091919
20105340.6
20114540.6
20126840.6
20132940.6
20141540.6
20152040.6
20164840.6
20173340.6
20184840.6
20194740.6
20215648.5
20224648.5
20234348.5
20244448.5
20256148.5
20264148.5
First to last qualifying date each year at Chalmers 5 W For each year, a bar from the first to the last day at Chalmers 5 W meeting 30 C (86 F). 2009: 24 May 2009 to 18 August 20092010: 24 May 2010 to 12 October 20102011: 11 May 2011 to 13 September 20112012: 4 May 2012 to 7 September 20122013: 15 May 2013 to 12 September 20132014: 8 May 2014 to 6 September 20142015: 11 June 2015 to 9 September 20152016: 26 May 2016 to 26 September 20162017: 18 May 2017 to 27 September 20172018: 3 May 2018 to 9 October 20182019: 19 May 2019 to 2 October 20192021: 23 May 2021 to 11 October 20212022: 11 May 2022 to 22 September 20222023: 25 May 2023 to 5 October 20232024: 3 May 2024 to 22 September 20242025: 16 May 2025 to 5 October 20252026: 29 May 2026 to 2 October 2026200920122015201820222025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Chalmers 5 W meeting 30 C (86 F).
First to last qualifying date each year at Chalmers 5 W
YearFirst dateLast date
20092009-05-242009-08-18
20102010-05-242010-10-12
20112011-05-112011-09-13
20122012-05-042012-09-07
20132013-05-152013-09-12
20142014-05-082014-09-06
20152015-06-112015-09-09
20162016-05-262016-09-26
20172017-05-182017-09-27
20182018-05-032018-10-09
20192019-05-192019-10-02
20212021-05-232021-10-11
20222022-05-112022-09-22
20232023-05-252023-10-05
20242024-05-032024-09-22
20252025-05-162025-10-05
20262026-05-292026-10-02

Every Fixed Threshold

Fixed thresholds at Chalmers 5 W
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1768201241
35 C (95 F): Days121420122
90 F (32.2 C): Days1738201218
100 F (37.8 C): Days1520125
0 C (32 F): Ice days (max1775201430
0 C (32 F): Frost days (min17155201868
-10 C (14 F): Days with min1760201416
-20 C (-4 F): Days with min141820147
-30 C (-22 F): Days with min1120181
20 C (68 F): Tropical nights (min1733202525
10 mm (0.39 in): Days with 10 mm or more rain3547200632
25 mm (0.98 in): Days with 25 mm or more rain351720039
50 mm (1.97 in): Days with 50 mm or more rain29520033
10 cm (3.9 in): Days with 10 cm or more snowfall21319991
25 cm (9.8 in): Days with 25 cm or more snowfall1120071

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2009.

Download the Data

  • Data for Chalmers 5 W 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 (2026-10-17).