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Built 2026-10-19 (19 October 2026)

Manassas 3 NW Threshold Days by Year (USC00445213)

18 fixed thresholds counted per year at Manassas 3 NW (USC00445213): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Manassas 3 NW Thresholds

  • Manassas 3 NW: days with 10 mm (0.39 in) or more of precipitation in 28 years, most in 1958 with 40.
  • Manassas 3 NW: days with 25 mm (0.98 in) or more of precipitation in 28 years, most in 1901 with 14.
  • Manassas 3 NW: nights with a minimum temperature at or below 0 C (32 F) in 27 years, most in 1969 with 114.
  • Manassas 3 NW: nights with a minimum temperature at or below -10 C (14 F) in 27 years, most in 1902 with 25.
  • 18 fixed thresholds have at least one qualifying day at Manassas 3 NW.
26 years with a qualifying day
Days at or above 30 C (86 F) per year at Manassas 3 NW Days per year at Manassas 3 NW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 99 in 1957. 02550751001896: 781898: 661899: 691900: 701901: 531902: 601951: 591952: 601953: 671954: 671955: 451957: 991958: 631959: 871961: 721962: 741965: 811966: 891967: 601968: 671969: 691970: 871973: 681974: 631979: 541980: 93189619001951195419581962196719701979
Days per year at Manassas 3 NW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 99 in 1957.
Days at or above 30 C (86 F) per year at Manassas 3 NW
YearDaysDecade average
18967871
18986671
18996971
19007061
19015361
19026061
19515968.4
19526068.4
19536768.4
19546768.4
19554568.4
19579968.4
19586368.4
19598768.4
19617273.1
19627473.1
19658173.1
19668973.1
19676073.1
19686773.1
19696973.1
19708768
19736868
19746368
19795468
19809393
First to last qualifying date each year at Manassas 3 NW For each year, a bar from the first to the last day at Manassas 3 NW meeting 30 C (86 F). 1896: 13 April 1896 to 19 September 18961898: 2 May 1898 to 19 September 18981899: 1 May 1899 to 8 September 18991900: 7 May 1900 to 27 September 19001901: 6 June 1901 to 16 September 19011902: 21 April 1902 to 8 September 19021951: 2 May 1951 to 6 October 19511952: 22 April 1952 to 14 September 19521953: 25 April 1953 to 30 September 19531954: 2 May 1954 to 13 October 19541955: 5 May 1955 to 16 September 19551957: 20 April 1957 to 23 September 19571958: 19 April 1958 to 10 October 19581959: 8 April 1959 to 7 October 19591961: 25 April 1961 to 27 September 19611962: 22 April 1962 to 16 October 19621965: 3 May 1965 to 24 September 19651966: 24 April 1966 to 12 September 19661967: 2 April 1967 to 6 October 19671968: 6 June 1968 to 2 October 19681969: 27 April 1969 to 18 September 19691970: 1 May 1970 to 27 September 19701973: 2 June 1973 to 29 September 19731974: 29 April 1974 to 14 September 19741979: 9 May 1979 to 7 September 19791980: 12 May 1980 to 23 September 19801896190119531958196519691979JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Manassas 3 NW meeting 30 C (86 F).
First to last qualifying date each year at Manassas 3 NW
YearFirst dateLast date
18961896-04-131896-09-19
18981898-05-021898-09-19
18991899-05-011899-09-08
19001900-05-071900-09-27
19011901-06-061901-09-16
19021902-04-211902-09-08
19511951-05-021951-10-06
19521952-04-221952-09-14
19531953-04-251953-09-30
19541954-05-021954-10-13
19551955-05-051955-09-16
19571957-04-201957-09-23
19581958-04-191958-10-10
19591959-04-081959-10-07
19611961-04-251961-09-27
19621962-04-221962-10-16
19651965-05-031965-09-24
19661966-04-241966-09-12
19671967-04-021967-10-06
19681968-06-061968-10-02
19691969-04-271969-09-18
19701970-05-011970-09-27
19731973-06-021973-09-29
19741974-04-291974-09-14
19791979-05-091979-09-07
19801980-05-121980-09-23

Every Fixed Threshold

Fixed thresholds at Manassas 3 NW
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2699195793
35 C (95 F): Days2635198035
40 C (104 F): Days1119801
90 F (32.2 C): Days2670198070
100 F (37.8 C): Days9419544
0 C (32 F): Ice days (max2622189912
0 C (32 F): Frost days (min27114196989
-10 C (14 F): Days with min2725190215
-20 C (-4 F): Days with min5318991
20 C (68 F): Tropical nights (min2764190034
25 C (77 F): Days with min8318961
10 mm (0.39 in): Days with 10 mm or more rain2840195820
25 mm (0.98 in): Days with 25 mm or more rain281419016
50 mm (1.97 in): Days with 50 mm or more rain20519011
100 mm (3.94 in): Days with 100 mm or more rain4119591
200 mm (7.87 in): Days with 200 mm or more rain10n/a1
10 cm (3.9 in): Days with 10 cm or more snowfall17619581
25 cm (9.8 in): Days with 25 cm or more snowfall6219581

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1896.

Download the Data

  • Data for Manassas 3 NW 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).