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Built 2026-10-19 (19 October 2026)

Alley Spring Rgr STN Threshold Days by Year (USC00230088)

7 fixed thresholds counted per year at Alley Spring Rgr STN (USC00230088): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Alley Spring Rgr STN Thresholds

  • Alley Spring Rgr STN: days with 10 mm (0.39 in) or more of precipitation in 13 years, most in 1996 with 49.
  • Alley Spring Rgr STN: days with 25 mm (0.98 in) or more of precipitation in 13 years, most in 1996 with 23.
  • Alley Spring Rgr STN: days with 50 mm (1.97 in) or more of precipitation in 13 years, most in 2008 with 7.
  • Alley Spring Rgr STN: days with 10 cm (3.9 in) or more of snowfall in 7 years, most in 2001 with 2.
  • 7 fixed thresholds have at least one qualifying day at Alley Spring Rgr STN.
13 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Alley Spring Rgr STN Days per year at Alley Spring Rgr STN with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 49 in 1996. 02040601987: 461996: 491997: 361998: 391999: 282000: 252001: 332003: 292005: 272006: 372007: 292008: 312009: 291987199719992001200520072009
Days per year at Alley Spring Rgr STN with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 49 in 1996.
Days with 10 mm (0.39 in) or more of precipitation per year at Alley Spring Rgr STN
YearDaysDecade average
19874646
19964938
19973638
19983938
19992838
20002530
20013330
20032930
20052730
20063730
20072930
20083130
20092930
First to last qualifying date each year at Alley Spring Rgr STN For each year, a bar from the first to the last day at Alley Spring Rgr STN meeting 10 mm (0.39 in). 1987: 9 January 1987 to 28 December 19871996: 3 January 1996 to 24 December 19961997: 9 January 1997 to 24 December 19971998: 5 January 1998 to 21 December 19981999: 18 January 1999 to 11 December 19992000: 3 January 2000 to 12 December 20002001: 9 February 2001 to 17 December 20012003: 21 February 2003 to 10 December 20032005: 4 January 2005 to 28 November 20052006: 10 January 2006 to 19 December 20062007: 1 January 2007 to 16 December 20072008: 5 March 2008 to 19 December 20082009: 10 February 2009 to 31 December 20091987199719992001200520072009JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Alley Spring Rgr STN meeting 10 mm (0.39 in).
First to last qualifying date each year at Alley Spring Rgr STN
YearFirst dateLast date
19871987-01-091987-12-28
19961996-01-031996-12-24
19971997-01-091997-12-24
19981998-01-051998-12-21
19991999-01-181999-12-11
20002000-01-032000-12-12
20012001-02-092001-12-17
20032003-02-212003-12-10
20052005-01-042005-11-28
20062006-01-102006-12-19
20072007-01-012007-12-16
20082008-03-052008-12-19
20092009-02-102009-12-31

Every Fixed Threshold

Fixed thresholds at Alley Spring Rgr STN
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1349199629
25 mm (0.98 in): Days with 25 mm or more rain1323199620
50 mm (1.97 in): Days with 50 mm or more rain13720087
100 mm (3.94 in): Days with 100 mm or more rain4220081
200 mm (7.87 in): Days with 200 mm or more rain1120081
10 cm (3.9 in): Days with 10 cm or more snowfall7220011
25 cm (9.8 in): Days with 25 cm or more snowfall1119991

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1987.

Download the Data

  • Data for Alley Spring Rgr STN 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).