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

Deerfield Dam Threshold Days by Year (USC00392234)

15 fixed thresholds counted per year at Deerfield Dam (USC00392234): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Deerfield Dam Thresholds

  • Deerfield Dam: days with 10 mm (0.39 in) or more of precipitation in 39 years, most in 1927 with 22.
  • Deerfield Dam: days with 25 mm (0.98 in) or more of precipitation in 34 years, most in 1922 with 6.
  • Deerfield Dam: days with 10 cm (3.9 in) or more of snowfall in 19 years, most in 1915 with 7.
  • Deerfield Dam: days with a maximum temperature at or above 30 C (86 F) in 7 years, most in 1949 with 22.
  • 15 fixed thresholds have at least one qualifying day at Deerfield Dam.
7 years with a qualifying day
Days at or above 30 C (86 F) per year at Deerfield Dam Days per year at Deerfield Dam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 22 in 1949. 01020301949: 221950: 41951: 91952: 91953: 91954: 191955: 101949195019511952195319541955
Days per year at Deerfield Dam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 22 in 1949.
Days at or above 30 C (86 F) per year at Deerfield Dam
YearDaysDecade average
19492222
1950410
1951910
1952910
1953910
19541910
19551010
First to last qualifying date each year at Deerfield Dam For each year, a bar from the first to the last day at Deerfield Dam meeting 30 C (86 F). 1949: 3 July 1949 to 24 August 19491950: 10 July 1950 to 1 September 19501951: 6 July 1951 to 1 August 19511952: 24 July 1952 to 6 September 19521953: 11 June 1953 to 25 August 19531954: 23 June 1954 to 31 August 19541955: 4 July 1955 to 1 September 19551949195019511952195319541955JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Deerfield Dam meeting 30 C (86 F).
First to last qualifying date each year at Deerfield Dam
YearFirst dateLast date
19491949-07-031949-08-24
19501950-07-101950-09-01
19511951-07-061951-08-01
19521952-07-241952-09-06
19531953-06-111953-08-25
19541954-06-231954-08-31
19551955-07-041955-09-01

Every Fixed Threshold

Fixed thresholds at Deerfield Dam
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days722194910
35 C (95 F): Days2319543
90 F (32.2 C): Days51119541
0 C (32 F): Ice days (max770195163
0 C (32 F): Frost days (min72601950215
-10 C (14 F): Days with min7119195294
-20 C (-4 F): Days with min743194920
-30 C (-22 F): Days with min7719503
10 mm (0.39 in): Days with 10 mm or more rain3922192716
25 mm (0.98 in): Days with 25 mm or more rain34619223
50 mm (1.97 in): Days with 50 mm or more rain7219431
100 mm (3.94 in): Days with 100 mm or more rain1119521
10 cm (3.9 in): Days with 10 cm or more snowfall19719156
25 cm (9.8 in): Days with 25 cm or more snowfall4219531
50 cm (19.7 in): Days with 50 cm or more snowfall1119531

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.

Download the Data

  • Data for Deerfield Dam 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).