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Data as of 2026-10-17
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Built 2026-10-18 (18 October 2026)

Rock Creek Threshold Days by Year

9 fixed thresholds counted per year at Rock Creek (USS0010J18S): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rock Creek Thresholds

  • Rock Creek: days with 10 mm (0.39 in) or more of precipitation in 46 years, most in 1996 with 32.
  • Rock Creek: days with 25 mm (0.98 in) or more of precipitation in 34 years, most in 1982 with 5.
  • Rock Creek: days with a maximum temperature at or below 0 C (32 F) in 21 years, most in 2023 with 66.
  • Rock Creek: nights with a minimum temperature at or below 0 C (32 F) in 21 years, most in 2019 with 233.
  • 9 fixed thresholds have at least one qualifying day at Rock Creek.
14 years with a qualifying day
Days at or above 30 C (86 F) per year at Rock Creek Days per year at Rock Creek with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 8 in 2020. 024682006: 62007: 22010: 12013: 72016: 12018: 32019: 12020: 82021: 52022: 12023: 22024: 52025: 32026: 82006201020162019202120232025
Days per year at Rock Creek with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 8 in 2020.
Days at or above 30 C (86 F) per year at Rock Creek
YearDaysDecade average
200664
200724
201012.6
201372.6
201612.6
201832.6
201912.6
202084.6
202154.6
202214.6
202324.6
202454.6
202534.6
202684.6
First to last qualifying date each year at Rock Creek For each year, a bar from the first to the last day at Rock Creek meeting 30 C (86 F). 2006: 15 July 2006 to 29 July 20062007: 2 July 2007 to 4 July 20072010: 16 July 2010 to 16 July 20102013: 27 June 2013 to 23 July 20132016: 28 June 2016 to 28 June 20162018: 10 July 2018 to 12 August 20182019: 23 July 2019 to 23 July 20192020: 11 July 2020 to 19 August 20202021: 16 June 2021 to 12 July 20212022: 6 September 2022 to 6 September 20222023: 16 July 2023 to 17 July 20232024: 11 July 2024 to 6 August 20242025: 13 July 2025 to 20 August 20252026: 11 July 2026 to 7 August 20262006201020162019202120232025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Rock Creek meeting 30 C (86 F).
First to last qualifying date each year at Rock Creek
YearFirst dateLast date
20062006-07-152006-07-29
20072007-07-022007-07-04
20102010-07-162010-07-16
20132013-06-272013-07-23
20162016-06-282016-06-28
20182018-07-102018-08-12
20192019-07-232019-07-23
20202020-07-112020-08-19
20212021-06-162021-07-12
20222022-09-062022-09-06
20232023-07-162023-07-17
20242024-07-112024-08-06
20252025-07-132025-08-20
20262026-07-112026-08-07

Every Fixed Threshold

Fixed thresholds at Rock Creek
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days14820208
0 C (32 F): Ice days (max216620239
0 C (32 F): Frost days (min212332019113
-10 C (14 F): Days with min2193200818
-20 C (-4 F): Days with min191220115
-30 C (-22 F): Days with min1120111
10 mm (0.39 in): Days with 10 mm or more rain4632199620
25 mm (0.98 in): Days with 25 mm or more rain34519825
50 mm (1.97 in): Days with 50 mm or more rain8119821

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2006.

Download the Data

  • Data for Rock Creek 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).