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Data as of 2025-12-31
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Built 2026-10-16 (16 October 2026)

Frederick Threshold Days by Year

9 fixed thresholds counted per year at Frederick (USC00393129): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Frederick Thresholds

  • Frederick: days with 10 mm (0.39 in) or more of precipitation in 7 years, most in 1957 with 22.
  • Frederick: days with 25 mm (0.98 in) or more of precipitation in 6 years, most in 1957 with 8.
  • Frederick: days with 50 mm (1.97 in) or more of precipitation in 4 years, most in 1957 with 3.
  • Frederick: days with 10 cm (3.9 in) or more of snowfall in 2 years, most in 1952 with 4.
  • 9 fixed thresholds have at least one qualifying day at Frederick.
7 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Frederick Days per year at Frederick with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 22 in 1957. 01020301907: 141908: 241909: 91952: 101953: 201956: 131957: 221907190819091952195319561957
Days per year at Frederick with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 22 in 1957.
Days with 10 mm (0.39 in) or more of precipitation per year at Frederick
YearDaysDecade average
19071415.7
19082415.7
1909915.7
19521016.3
19532016.3
19561316.3
19572216.3
First to last qualifying date each year at Frederick For each year, a bar from the first to the last day at Frederick meeting 10 mm (0.39 in). 1907: 2 January 1907 to 30 September 19071908: 31 January 1908 to 16 December 19081909: 10 February 1909 to 2 September 19091952: 14 January 1952 to 18 November 19521953: 10 February 1953 to 20 November 19531956: 27 March 1956 to 2 November 19561957: 19 April 1957 to 1 November 19571907190819091952195319561957JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Frederick meeting 10 mm (0.39 in).
First to last qualifying date each year at Frederick
YearFirst dateLast date
19071907-01-021907-09-30
19081908-01-311908-12-16
19091909-02-101909-09-02
19521952-01-141952-11-18
19531953-02-101953-11-20
19561956-03-271956-11-02
19571957-04-191957-11-01

Every Fixed Threshold

Fixed thresholds at Frederick
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
0 C (32 F): Frost days (min10n/a209
-10 C (14 F): Days with min10n/a103
-20 C (-4 F): Days with min10n/a32
-30 C (-22 F): Days with min10n/a10
20 C (68 F): Tropical nights (min10n/a3
10 mm (0.39 in): Days with 10 mm or more rain722195722
25 mm (0.98 in): Days with 25 mm or more rain6819578
50 mm (1.97 in): Days with 50 mm or more rain4319573
10 cm (3.9 in): Days with 10 cm or more snowfall2419522

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1907.

Download the Data

  • Data for Frederick 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).