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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Harrisburg Threshold Days by Year (USC00353678)

4 fixed thresholds counted per year at Harrisburg (USC00353678): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Harrisburg Thresholds

  • Harrisburg: days with 10 mm (0.39 in) or more of precipitation in 12 years, most in 1950 with 42.
  • Harrisburg: days with 25 mm (0.98 in) or more of precipitation in 12 years, most in 1950 with 14.
  • Harrisburg: days with 50 mm (1.97 in) or more of precipitation in 7 years, most in 1955 with 3.
  • Harrisburg: days with 10 cm (3.9 in) or more of snowfall in 2 years, most in 1950 with 2.
  • 4 fixed thresholds have at least one qualifying day at Harrisburg.
12 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Harrisburg Days per year at Harrisburg with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 42 in 1950. 02040601911: 251945: 381946: 311947: 301949: 241950: 421951: 371952: 261953: 351954: 391955: 321956: 31191119461949195119531955
Days per year at Harrisburg with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 42 in 1950.
Days with 10 mm (0.39 in) or more of precipitation per year at Harrisburg
YearDaysDecade average
19112525
19453830.8
19463130.8
19473030.8
19492430.8
19504234.6
19513734.6
19522634.6
19533534.6
19543934.6
19553234.6
19563134.6
First to last qualifying date each year at Harrisburg For each year, a bar from the first to the last day at Harrisburg meeting 10 mm (0.39 in). 1911: 9 January 1911 to 28 December 19111945: 15 January 1945 to 29 December 19451946: 4 January 1946 to 15 December 19461947: 26 January 1947 to 31 December 19471949: 1 January 1949 to 24 December 19491950: 7 January 1950 to 16 December 19501951: 3 January 1951 to 29 December 19511952: 9 January 1952 to 30 December 19521953: 2 January 1953 to 20 December 19531954: 3 January 1954 to 30 December 19541955: 5 January 1955 to 26 December 19551956: 4 January 1956 to 11 December 1956191119461949195119531955JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Harrisburg meeting 10 mm (0.39 in).
First to last qualifying date each year at Harrisburg
YearFirst dateLast date
19111911-01-091911-12-28
19451945-01-151945-12-29
19461946-01-041946-12-15
19471947-01-261947-12-31
19491949-01-011949-12-24
19501950-01-071950-12-16
19511951-01-031951-12-29
19521952-01-091952-12-30
19531953-01-021953-12-20
19541954-01-031954-12-30
19551955-01-051955-12-26
19561956-01-041956-12-11

Every Fixed Threshold

Fixed thresholds at Harrisburg
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1242195031
25 mm (0.98 in): Days with 25 mm or more rain121419505
50 mm (1.97 in): Days with 50 mm or more rain7319551
10 cm (3.9 in): Days with 10 cm or more snowfall2219502

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1911.

Download the Data

  • Data for Harrisburg 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).