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Built 2026-10-19 (19 October 2026)

Round Spring 2SW Threshold Days by Year (USC00237309)

16 fixed thresholds counted per year at Round Spring 2SW (USC00237309): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Round Spring 2SW Thresholds

  • Round Spring 2SW: days with 10 mm (0.39 in) or more of precipitation in 59 years, most in 2019 with 56.
  • Round Spring 2SW: days with 25 mm (0.98 in) or more of precipitation in 59 years, most in 1951 with 24.
  • Round Spring 2SW: days with 50 mm (1.97 in) or more of precipitation in 52 years, most in 2015 with 8.
  • Round Spring 2SW: days with 10 cm (3.9 in) or more of snowfall in 26 years, most in 1960 with 5.
  • 16 fixed thresholds have at least one qualifying day at Round Spring 2SW.
19 years with a qualifying day
Days at or above 30 C (86 F) per year at Round Spring 2SW Days per year at Round Spring 2SW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 105 in 2018. 0501001502004: 522005: 992007: 932008: 572009: 562013: 572014: 692015: 632016: 912017: 822018: 1052019: 952020: 772021: 812022: 882023: 942024: 842025: 902026: 1062004200720092014201620182020202220242026
Days per year at Round Spring 2SW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 105 in 2018.
Days at or above 30 C (86 F) per year at Round Spring 2SW
YearDaysDecade average
20045271.4
20059971.4
20079371.4
20085771.4
20095671.4
20135780.3
20146980.3
20156380.3
20169180.3
20178280.3
201810580.3
20199580.3
20207788.6
20218188.6
20228888.6
20239488.6
20248488.6
20259088.6
202610688.6
First to last qualifying date each year at Round Spring 2SW For each year, a bar from the first to the last day at Round Spring 2SW meeting 30 C (86 F). 2004: 17 April 2004 to 20 September 20042005: 11 May 2005 to 20 October 20052007: 30 April 2007 to 9 October 20072008: 24 April 2008 to 13 September 20082009: 24 April 2009 to 9 September 20092013: 18 April 2013 to 20 September 20132014: 11 April 2014 to 3 October 20142015: 7 June 2015 to 22 October 20152016: 16 March 2016 to 20 October 20162017: 21 March 2017 to 15 October 20172018: 7 May 2018 to 9 October 20182019: 11 April 2019 to 3 October 20192020: 9 April 2020 to 12 October 20202021: 24 May 2021 to 11 October 20212022: 10 May 2022 to 25 September 20222023: 7 May 2023 to 22 October 20232024: 28 February 2024 to 13 October 20242025: 12 March 2025 to 15 October 20252026: 21 March 2026 to 14 October 20262004200820142017202020232026JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Round Spring 2SW meeting 30 C (86 F).
First to last qualifying date each year at Round Spring 2SW
YearFirst dateLast date
20042004-04-172004-09-20
20052005-05-112005-10-20
20072007-04-302007-10-09
20082008-04-242008-09-13
20092009-04-242009-09-09
20132013-04-182013-09-20
20142014-04-112014-10-03
20152015-06-072015-10-22
20162016-03-162016-10-20
20172017-03-212017-10-15
20182018-05-072018-10-09
20192019-04-112019-10-03
20202020-04-092020-10-12
20212021-05-242021-10-11
20222022-05-102022-09-25
20232023-05-072023-10-22
20242024-02-282024-10-13
20252025-03-122025-10-15
20262026-03-212026-10-14

Every Fixed Threshold

Fixed thresholds at Round Spring 2SW
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days191052018106
35 C (95 F): Days1934202234
40 C (104 F): Days5520221
90 F (32.2 C): Days1966201871
100 F (37.8 C): Days816202215
0 C (32 F): Ice days (max191820148
0 C (32 F): Frost days (min19145201467
-10 C (14 F): Days with min1941201420
-20 C (-4 F): Days with min9620144
20 C (68 F): Tropical nights (min1936201639
10 mm (0.39 in): Days with 10 mm or more rain5956201923
25 mm (0.98 in): Days with 25 mm or more rain592419519
50 mm (1.97 in): Days with 50 mm or more rain52820152
100 mm (3.94 in): Days with 100 mm or more rain15219661
10 cm (3.9 in): Days with 10 cm or more snowfall26519601
25 cm (9.8 in): Days with 25 cm or more snowfall1119511

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2004.

Download the Data

  • Data for Round Spring 2SW 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).