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Built 2026-10-18 (18 October 2026)

Penfield Weapons Research Threshold Days by Year

13 fixed thresholds counted per year at Penfield Weapons Research (ASN00023015): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Penfield Weapons Research Thresholds

  • Penfield Weapons Research: days with 10 mm (0.39 in) or more of precipitation in 30 years, most in 1974 with 25.
  • Penfield Weapons Research: days with a maximum temperature at or above 30 C (86 F) in 22 years, most in 1961 with 74.
  • Penfield Weapons Research: days with a maximum temperature at or above 35 C (95 F) in 22 years, most in 1961 with 39.
  • Penfield Weapons Research: days with a maximum temperature at or above 90 F (32.2 C) in 22 years, most in 1961 with 57.
  • 13 fixed thresholds have at least one qualifying day at Penfield Weapons Research.
22 years with a qualifying day
Days at or above 30 C (86 F) per year at Penfield Weapons Research Days per year at Penfield Weapons Research with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 74 in 1961. 0204060801957: 371958: 491959: 611960: 621961: 741962: 681963: 511964: 371965: 621966: 411967: 531968: 581969: 421970: 511971: 521972: 521973: 541974: 531975: 601976: 511977: 651978: 5419571960196319661969197219751978
Days per year at Penfield Weapons Research with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 74 in 1961.
Days at or above 30 C (86 F) per year at Penfield Weapons Research
YearDaysDecade average
19573749
19584949
19596149
19606254.8
19617454.8
19626854.8
19635154.8
19643754.8
19656254.8
19664154.8
19675354.8
19685854.8
19694254.8
19705154.7
19715254.7
19725254.7
19735454.7
19745354.7
19756054.7
19765154.7
19776554.7
19785454.7
First to last qualifying date each year at Penfield Weapons Research For each year, a bar from the first to the last day at Penfield Weapons Research meeting 30 C (86 F). 1957: 1 February 1957 to 28 December 19571958: 4 January 1958 to 23 December 19581959: 1 January 1959 to 31 December 19591960: 1 January 1960 to 30 December 19601961: 6 January 1961 to 27 December 19611962: 2 January 1962 to 31 December 19621963: 2 January 1963 to 20 December 19631964: 6 January 1964 to 20 December 19641965: 6 January 1965 to 23 December 19651966: 21 January 1966 to 22 December 19661967: 4 January 1967 to 10 December 19671968: 2 January 1968 to 22 December 19681969: 6 January 1969 to 17 December 19691970: 7 January 1970 to 17 December 19701971: 5 January 1971 to 9 December 19711972: 4 January 1972 to 21 December 19721973: 2 January 1973 to 19 December 19731974: 2 January 1974 to 24 December 19741975: 1 January 1975 to 31 December 19751976: 1 January 1976 to 31 December 19761977: 4 January 1977 to 31 December 19771978: 1 January 1978 to 31 December 197819571960196319661969197219751978JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Penfield Weapons Research meeting 30 C (86 F).
First to last qualifying date each year at Penfield Weapons Research
YearFirst dateLast date
19571957-02-011957-12-28
19581958-01-041958-12-23
19591959-01-011959-12-31
19601960-01-011960-12-30
19611961-01-061961-12-27
19621962-01-021962-12-31
19631963-01-021963-12-20
19641964-01-061964-12-20
19651965-01-061965-12-23
19661966-01-211966-12-22
19671967-01-041967-12-10
19681968-01-021968-12-22
19691969-01-061969-12-17
19701970-01-071970-12-17
19711971-01-051971-12-09
19721972-01-041972-12-21
19731973-01-021973-12-19
19741974-01-021974-12-24
19751975-01-011975-12-31
19761976-01-011976-12-31
19771977-01-041977-12-31
19781978-01-011978-12-31

Every Fixed Threshold

Fixed thresholds at Penfield Weapons Research
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2274196154
35 C (95 F): Days2239196116
40 C (104 F): Days20919611
45 C (113 F): Days2219591
90 F (32.2 C): Days2257196131
100 F (37.8 C): Days221819614
110 F (43.3 C): Days4219592
0 C (32 F): Frost days (min121019581
20 C (68 F): Tropical nights (min2238196817
25 C (77 F): Days with min22919732
10 mm (0.39 in): Days with 10 mm or more rain3025197417
25 mm (0.98 in): Days with 25 mm or more rain19419742
50 mm (1.97 in): Days with 50 mm or more rain5119541

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1957.

Download the Data

  • Data for Penfield Weapons Research 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).