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Manassas 3 NW Weather Records (USC00445213)

Record envelope, standing records and threshold days for Manassas 3 NW (USC00445213), Virginia, United States, with 91 years of record.

Key Facts for Manassas 3 NW

  • Manassas 3 NW (USC00445213) is a weather station in Virginia, United States at 38.78 latitude and -77.50 longitude, 101 m (331 ft) above sea level.
  • The station reports from 1895 to 1985, 91 years of record.
  • 1,464 records set at Manassas 3 NW still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Manassas 3 NW set a daily record high minimum temperature of 23.9 C (75.0 F) on 22 July 1985.

About the Station

  • Location: Virginia, United States, 38.78 latitude, -77.50 longitude.
  • Elevation: 101 m (331 ft).
  • Period of record: 1895 to 1985, 91 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Manassas 3 NW, with 2026 drawn through them The band shows the record high and record low for each calendar day at Manassas 3 NW. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Manassas 3 NW. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Manassas 3 NW, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan25.0 C (77.0 F)-22.2 C (-8.0 F)n/an/a
Feb24.4 C (75.9 F)-29.4 C (-20.9 F)n/an/a
Mar29.4 C (84.9 F)-20.6 C (-5.1 F)n/an/a
Apr35.0 C (95.0 F)-7.2 C (19.0 F)n/an/a
May35.6 C (96.1 F)-1.7 C (28.9 F)n/an/a
Jun37.8 C (100.0 F)4.4 C (39.9 F)n/an/a
Jul40.0 C (104.0 F)8.9 C (48.0 F)n/an/a
Aug39.4 C (102.9 F)4.4 C (39.9 F)n/an/a
Sep38.3 C (100.9 F)0.6 C (33.1 F)n/an/a
Oct33.9 C (93.0 F)-7.2 C (19.0 F)n/an/a
Nov29.4 C (84.9 F)-12.8 C (9.0 F)n/an/a
Dec23.9 C (75.0 F)-18.9 C (-2.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Manassas 3 NW by the year they were set 1,464 records at Manassas 3 NW still stand. 1896 holds the most, with 59. 02040601895: 461896: 591897: 341898: 471899: 501900: 541901: 491902: 371903: 241950: 321951: 381952: 411953: 341954: 571955: 321956: 471957: 451958: 351959: 421960: 431961: 341962: 241963: 271964: 301965: 301966: 321967: 461968: 301969: 181970: 291971: 321972: 221973: 231974: 351975: 131976: 181977: 281978: 171979: 341980: 311981: 201982: 151983: 181984: 101985: 2189519001951195619611966197119761981
1,464 records at Manassas 3 NW still stand. 1896 holds the most, with 59.
Standing records at Manassas 3 NW by the year they were set
Year setStanding records
189546
189659
189734
189847
189950
190054
190149
190237
190324
195032
195138
195241
195334
195457
195532
195647
195745
195835
195942
196043
196134
196224
196327
196430
196530
196632
196746
196830
196918
197029
197132
197222
197323
197435
197513
197618
197728
197817
197934
198031
198120
198215
198318
198410
19852

All-Time Record Progression

1 new records
When Manassas 3 NW set new all-time records 1 all-time records were set at Manassas 3 NW between 16 July 1980 and 16 July 1980. Each dot is a new record. Record high maximum temperature16 July 1980: Record high maximum temperature 40.0 C (104.0 F)1980
1 all-time records were set at Manassas 3 NW between 16 July 1980 and 16 July 1980. Each dot is a new record.
When Manassas 3 NW set new all-time records
DateKindDetail
1980-07-16Record high maximum temperatureRecord high maximum temperature 40.0 C (104.0 F)

Wettest Day of Each Month

Jun: 241.3 mm (9.5 in)
Record daily precipitation for each month at Manassas 3 NW The wettest day on record for each calendar month at Manassas 3 NW. The most was 241.3 mm (9.5 in) on 21 June 1972. 0100200300 Jan: 89.4 mm (3.5 in), 27 January 1897 Jan Feb: 88.9 mm (3.5 in), 2 February 1897 Feb Mar: 55.9 mm (2.2 in), 7 March 1967 Mar Apr: 60.2 mm (2.4 in), 14 April 1901 Apr May: 73.7 mm (2.9 in), 2 May 1962 May Jun: 241.3 mm (9.5 in), 21 June 1972 Jun Jul: 91.4 mm (3.6 in), 5 July 1956 Jul Aug: 71.4 mm (2.8 in), 25 August 1967 Aug Sep: 152.4 mm (6.0 in), 14 September 1966 Sep Oct: 71.1 mm (2.8 in), 19 October 1966 Oct Nov: 74.2 mm (2.9 in), 7 November 1963 Nov Dec: 83.1 mm (3.3 in), 28 December 1901 Dec
The wettest day on record for each calendar month at Manassas 3 NW. The most was 241.3 mm (9.5 in) on 21 June 1972.
Record daily precipitation for each month at Manassas 3 NW
MonthRecord daily precipitation (mm)Date
Jan89.4 mm (3.5 in)27 January 1897
Feb88.9 mm (3.5 in)2 February 1897
Mar55.9 mm (2.2 in)7 March 1967
Apr60.2 mm (2.4 in)14 April 1901
May73.7 mm (2.9 in)2 May 1962
Jun241.3 mm (9.5 in)21 June 1972
Jul91.4 mm (3.6 in)5 July 1956
Aug71.4 mm (2.8 in)25 August 1967
Sep152.4 mm (6.0 in)14 September 1966
Oct71.1 mm (2.8 in)19 October 1966
Nov74.2 mm (2.9 in)7 November 1963
Dec83.1 mm (3.3 in)28 December 1901

Period of Record Coverage

1895 to 1985
Days with data per year at Manassas 3 NW 45 years of record at Manassas 3 NW, 1895 to 1985. 19 years have data for under 90 percent of days and are left out of rankings: 1895, 1897, 1903, 1950, 1956, 1960, 1963, 1964 and others. 1895: 189 of 365 days1896: 358 of 366 days1897: 324 of 365 days1898: 355 of 365 days1899: 358 of 365 days1900: 352 of 365 days1901: 343 of 365 days1902: 353 of 365 days1903: 300 of 365 days1950: 182 of 365 days1951: 361 of 365 days1952: 366 of 366 days1953: 365 of 365 days1954: 353 of 365 days1955: 339 of 365 days1956: 324 of 366 days1957: 363 of 365 days1958: 355 of 365 days1959: 338 of 365 days1960: 301 of 366 days1961: 335 of 365 days1962: 336 of 365 days1963: 281 of 365 days1964: 312 of 366 days1965: 346 of 365 days1966: 343 of 365 days1967: 329 of 365 days1968: 361 of 366 days1969: 364 of 365 days1970: 356 of 365 days1971: 315 of 365 days1972: 314 of 366 days1973: 363 of 365 days1974: 353 of 365 days1975: 181 of 365 days1976: 210 of 366 days1977: 325 of 365 days1978: 296 of 365 days1979: 341 of 365 days1980: 352 of 366 days1981: 290 of 365 days1982: 213 of 365 days1983: 171 of 365 days1984: 172 of 366 days1985: 23 of 365 days19001950196019701980
45 years of record at Manassas 3 NW, 1895 to 1985. 19 years have data for under 90 percent of days and are left out of rankings: 1895, 1897, 1903, 1950, 1956, 1960, 1963, 1964 and others.
Days with data per year at Manassas 3 NW
YearDays with dataShare of yearComplete
189518952%No
189635898%Yes
189732489%No
189835597%Yes
189935898%Yes
190035296%Yes
190134394%Yes
190235397%Yes
190330082%No
195018250%No
195136199%Yes
1952366100%Yes
1953365100%Yes
195435397%Yes
195533993%Yes
195632489%No
195736399%Yes
195835597%Yes
195933893%Yes
196030182%No
196133592%Yes
196233692%Yes
196328177%No
196431285%No
196534695%Yes
196634394%Yes
196732990%Yes
196836199%Yes
1969364100%Yes
197035698%Yes
197131586%No
197231486%No
197336399%Yes
197435397%Yes
197518150%No
197621057%No
197732589%No
197829681%No
197934193%Yes
198035296%Yes
198129079%No
198221358%No
198317147%No
198417247%No
1985236%No

Latest Records

20
Latest records at Manassas 3 NW
DateStationRecordValueBeat old record byOld record stoodSignificance
22 July 1985Manassas 3 NW, USdaily high min23.9 C (75.0 F)0.6 C (1.1 F)32 years20 of 100 (Routine)
15 July 1985Manassas 3 NW, USdaily high min23.9 C (75.0 F)0.6 C (1.1 F)24 years18 of 100 (Routine)
1 July 1985Manassas 3 NW, USdaily low max (Tie)23.9 C (75.0 F)tie32 years4 of 100 (Routine)
29 November 1984Manassas 3 NW, USdaily rain38.1 mm (1.5 in)6.9 mm (0.27 in)21 years20 of 100 (Routine)
29 October 1984Manassas 3 NW, USdaily high min20.0 C (68.0 F)6.1 C (11.0 F)84 years45 of 100 (Notable)
23 October 1984Manassas 3 NW, USdaily high min16.1 C (61.0 F)0.5 C (0.9 F)5 years10 of 100 (Routine)
22 October 1984Manassas 3 NW, USdaily high min21.1 C (70.0 F)5.5 C (9.9 F)14 years23 of 100 (Routine)
19 October 1984Manassas 3 NW, USdaily high min20.0 C (68.0 F)1.7 C (3.1 F)16 years16 of 100 (Routine)
17 October 1984Manassas 3 NW, USdaily high min16.1 C (61.0 F)0.5 C (0.9 F)22 years15 of 100 (Routine)
14 August 1984Manassas 3 NW, USdaily high min (Tie)22.8 C (73.0 F)tie87 years8 of 100 (Routine)
10 August 1984Manassas 3 NW, USdaily rain52.1 mm (2.1 in)6.4 mm (0.25 in)15 years17 of 100 (Routine)
2 August 1984Manassas 3 NW, USdaily rain15.2 mm (0.6 in)6.8 mm (0.27 in)30 years20 of 100 (Routine)
9 May 1984Manassas 3 NW, USdaily low max (Tie)15.6 C (60.1 F)tie30 years4 of 100 (Routine)
4 May 1984Manassas 3 NW, USdaily rain31.8 mm (1.3 in)19.6 mm (0.8 in)9 years28 of 100 (Routine)
13 April 1984Manassas 3 NW, USdaily high min11.1 C (52.0 F)1.1 C (2.0 F)6 years12 of 100 (Routine)
29 March 1984Manassas 3 NW, USdaily snowfall4.3 cm (1.7 in)4.3 cm (1.7 in)85 years20 of 100 (Routine)
29 March 1984Manassas 3 NW, USdaily snow depth5.1 cm (2.0 in)5.1 cm (2.0 in)33 years20 of 100 (Routine)
29 March 1984Manassas 3 NW, USdaily low max (Tie)4.4 C (39.9 F)tie28 years4 of 100 (Routine)
9 March 1984Manassas 3 NW, USdaily snow depth12.7 cm (5.0 in)7.6 cm (3.0 in)24 years22 of 100 (Routine)
9 March 1984Manassas 3 NW, USdaily rain12.2 mm (0.5 in)5.6 mm (0.22 in)26 years20 of 100 (Routine)

Climate Trend

24 complete years, 1896 to 1980
Annual mean temperature at Manassas 3 NW as warming stripes, 1896 to 1980 One stripe for each of 24 complete years at Manassas 3 NW, 1896 to 1980. Blue stripes are years cooler than the station's own mean of 13.2 C (55.8 F); red stripes are warmer. The coolest year was 1958, at 12.3 C (54.1 F), and the warmest was 1953, at 14.0 C (57.1 F). The strongest colour marks a difference of 1.0 C (1.8 F). 1896: 13.3 C, +0.1 C from the station mean1898: 13.4 C, +0.2 C from the station mean1899: 12.7 C, -0.5 C from the station mean1900: 13.6 C, +0.4 C from the station mean1901: 12.5 C, -0.7 C from the station mean1902: 12.6 C, -0.6 C from the station mean1951: 13.1 C, -0.1 C from the station mean1952: 13.3 C, +0.1 C from the station mean1953: 14.0 C, +0.7 C from the station mean1955: 12.5 C, -0.7 C from the station mean1956: 12.9 C, -0.3 C from the station mean1957: 13.7 C, +0.5 C from the station mean1958: 12.3 C, -1.0 C from the station mean1959: 13.9 C, +0.7 C from the station mean1961: 13.4 C, +0.2 C from the station mean1962: 13.0 C, -0.3 C from the station mean1965: 13.6 C, +0.4 C from the station mean1966: 13.2 C, -0.1 C from the station mean1968: 13.0 C, -0.2 C from the station mean1969: 12.8 C, -0.5 C from the station mean1970: 13.2 C, 0.0 C from the station mean1973: 13.8 C, +0.5 C from the station mean1974: 13.7 C, +0.5 C from the station mean1980: 13.6 C, +0.4 C from the station mean1896190019101920193019401950196019701980
One stripe for each of 24 complete years at Manassas 3 NW, 1896 to 1980. Blue stripes are years cooler than the station's own mean of 13.2 C (55.8 F); red stripes are warmer. The coolest year was 1958, at 12.3 C (54.1 F), and the warmest was 1953, at 14.0 C (57.1 F). The strongest colour marks a difference of 1.0 C (1.8 F).
Annual mean temperature at Manassas 3 NW as warming stripes, 1896 to 1980
YearAnnual mean temperatureDifference from the station mean
189613.3 C+0.13 C
189813.4 C+0.17 C
189912.7 C-0.52 C
190013.6 C+0.43 C
190112.5 C-0.68 C
190212.6 C-0.57 C
195113.1 C-0.10 C
195213.3 C+0.12 C
195314.0 C+0.75 C
195512.5 C-0.74 C
195612.9 C-0.27 C
195713.7 C+0.53 C
195812.3 C-0.95 C
195913.9 C+0.66 C
196113.4 C+0.18 C
196213.0 C-0.26 C
196513.6 C+0.39 C
196613.2 C-0.05 C
196813.0 C-0.22 C
196912.8 C-0.46 C
197013.2 C+0.03 C
197313.8 C+0.54 C
197413.7 C+0.53 C
198013.6 C+0.40 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1895 to 1985
Yearly extremes at Manassas 3 NW: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)40.0 C (104.0 F)198036.1 C (97.0 F)45
Coldest night (TNn)-29.4 C (-20.9 F)1899-16.7 C (1.9 F)45
Wettest day (Rx1day)241.3 mm (9.5 in)197256.9 mm (2.2 in)51
Wettest five days (Rx5day)281.9 mm (11.1 in)197287.0 mm (3.4 in)50
Longest dry spell (CDD)40 days190120 days51

Hottest day (TXx)

Hottest day (TXx) at Manassas 3 NW by year The hottest day of the year at Manassas 3 NW, 1895 to 1985. The record is 40.0 C (104.0 F) in 1980, marked on the chart; the median year is 36.1 C (97.0 F). 323436384019001920194019601980Record: 40.0 C (104.0 F) in 1980
The hottest day of the year at Manassas 3 NW, 1895 to 1985. The record is 40.0 C (104.0 F) in 1980, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Manassas 3 NW by year
YearHottest day (TXx)
189536.7 C (98.1 F)
189636.7 C (98.1 F)
189735.6 C (96.1 F)
189838.3 C (100.9 F)
189936.1 C (97.0 F)
190037.2 C (99.0 F)
190137.2 C (99.0 F)
190239.4 C (102.9 F)
190335.0 C (95.0 F)
1920n/a
1921n/a
1922n/a
1923n/a
1924n/a
1925n/a
195033.3 C (91.9 F)
195136.1 C (97.0 F)
195236.7 C (98.1 F)
195338.9 C (102.0 F)
195439.4 C (102.9 F)
195535.6 C (96.1 F)
195636.1 C (97.0 F)
195737.8 C (100.0 F)
195835.0 C (95.0 F)
195937.8 C (100.0 F)
196035.6 C (96.1 F)
196135.0 C (95.0 F)
196236.7 C (98.1 F)
196336.1 C (97.0 F)
196436.7 C (98.1 F)
196536.1 C (97.0 F)
196638.9 C (102.0 F)
196735.0 C (95.0 F)
196837.2 C (99.0 F)
196937.2 C (99.0 F)
197035.6 C (96.1 F)
197136.1 C (97.0 F)
197235.6 C (96.1 F)
197337.8 C (100.0 F)
197436.1 C (97.0 F)
197535.6 C (96.1 F)
197636.1 C (97.0 F)
197739.4 C (102.9 F)
197836.7 C (98.1 F)
197936.1 C (97.0 F)
198040.0 C (104.0 F)
198136.7 C (98.1 F)
198236.1 C (97.0 F)
198339.4 C (102.9 F)
198432.8 C (91.0 F)
198535.0 C (95.0 F)

Coldest night (TNn)

Coldest night (TNn) at Manassas 3 NW by year The coldest night of the year at Manassas 3 NW, 1895 to 1985. The record is -29.4 C (-20.9 F) in 1899, marked on the chart; the median year is -16.7 C (1.9 F). -40-2002019001920194019601980Record: -29.4 C (-20.9 F) in 1899
The coldest night of the year at Manassas 3 NW, 1895 to 1985. The record is -29.4 C (-20.9 F) in 1899, marked on the chart; the median year is -16.7 C (1.9 F).
Coldest night (TNn) at Manassas 3 NW by year
YearColdest night (TNn)
1895-13.3 C (8.1 F)
1896-15.0 C (5.0 F)
1897-13.9 C (7.0 F)
1898-17.8 C (0.0 F)
1899-29.4 C (-20.9 F)
1900-16.7 C (1.9 F)
1901-13.9 C (7.0 F)
1902-16.7 C (1.9 F)
1903-12.2 C (10.0 F)
1920n/a
1921n/a
1922n/a
1923n/a
1924n/a
1925n/a
1950-12.2 C (10.0 F)
1951-17.2 C (1.0 F)
1952-12.8 C (9.0 F)
1953-11.1 C (12.0 F)
1954-13.3 C (8.1 F)
1955-16.1 C (3.0 F)
1956-11.7 C (10.9 F)
1957-20.0 C (-4.0 F)
1958-17.2 C (1.0 F)
1959-14.4 C (6.1 F)
1960-20.6 C (-5.1 F)
1961-21.1 C (-6.0 F)
1962-17.8 C (0.0 F)
1963-16.1 C (3.0 F)
1964-17.8 C (0.0 F)
1965-17.2 C (1.0 F)
1966-15.0 C (5.0 F)
1967-20.0 C (-4.0 F)
1968-22.2 C (-8.0 F)
1969-16.7 C (1.9 F)
1970-17.8 C (0.0 F)
1971-18.3 C (-0.9 F)
1972-12.2 C (10.0 F)
1973-13.3 C (8.1 F)
1974-15.0 C (5.0 F)
1975-12.2 C (10.0 F)
1976-11.7 C (10.9 F)
1977-17.8 C (0.0 F)
1978-12.2 C (10.0 F)
1979-17.8 C (0.0 F)
1980-16.7 C (1.9 F)
1981-17.8 C (0.0 F)
1982-22.2 C (-8.0 F)
1983-10.6 C (12.9 F)
1984-16.7 C (1.9 F)
198513.3 C (55.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Manassas 3 NW by year The wettest day of the year at Manassas 3 NW, 1895 to 1985. The record is 241.3 mm (9.5 in) in 1972, marked on the chart; the median year is 56.9 mm (2.2 in). 010020030019001920194019601980Record: 241.3 mm (9.5 in) in 1972
The wettest day of the year at Manassas 3 NW, 1895 to 1985. The record is 241.3 mm (9.5 in) in 1972, marked on the chart; the median year is 56.9 mm (2.2 in).
Wettest day (Rx1day) at Manassas 3 NW by year
YearWettest day (Rx1day)
189548.3 mm (1.9 in)
189664.3 mm (2.5 in)
189789.4 mm (3.5 in)
189844.5 mm (1.8 in)
189950.8 mm (2.0 in)
190048.3 mm (1.9 in)
190183.1 mm (3.3 in)
190265.3 mm (2.6 in)
190371.1 mm (2.8 in)
192023.1 mm (0.9 in)
192150.8 mm (2.0 in)
192263.5 mm (2.5 in)
192372.4 mm (2.9 in)
192459.4 mm (2.3 in)
192556.9 mm (2.2 in)
195059.7 mm (2.4 in)
195158.4 mm (2.3 in)
195285.9 mm (3.4 in)
195349.8 mm (2.0 in)
195454.1 mm (2.1 in)
195569.9 mm (2.8 in)
1956101.6 mm (4.0 in)
195774.9 mm (2.9 in)
195850.8 mm (2.0 in)
1959106.7 mm (4.2 in)
196089.9 mm (3.5 in)
196148.5 mm (1.9 in)
196273.7 mm (2.9 in)
196374.2 mm (2.9 in)
196469.6 mm (2.7 in)
196535.1 mm (1.4 in)
1966152.4 mm (6.0 in)
196771.4 mm (2.8 in)
196839.6 mm (1.6 in)
196951.3 mm (2.0 in)
197046.7 mm (1.8 in)
197149.5 mm (1.9 in)
1972241.3 mm (9.5 in)
197371.1 mm (2.8 in)
197459.9 mm (2.4 in)
197555.9 mm (2.2 in)
197650.8 mm (2.0 in)
197753.1 mm (2.1 in)
197848.3 mm (1.9 in)
197971.1 mm (2.8 in)
198040.1 mm (1.6 in)
198140.6 mm (1.6 in)
198235.6 mm (1.4 in)
198336.8 mm (1.4 in)
198452.1 mm (2.1 in)
198520.3 mm (0.8 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Manassas 3 NW by year The wettest five days of the year at Manassas 3 NW, 1895 to 1985. The record is 281.9 mm (11.1 in) in 1972, marked on the chart; the median year is 87.0 mm (3.4 in). 010020030019001920194019601980Record: 281.9 mm (11.1 in) in 1972
The wettest five days of the year at Manassas 3 NW, 1895 to 1985. The record is 281.9 mm (11.1 in) in 1972, marked on the chart; the median year is 87.0 mm (3.4 in).
Wettest five days (Rx5day) at Manassas 3 NW by year
YearWettest five days (Rx5day)
189532.0 mm (1.3 in)
189691.4 mm (3.6 in)
189789.4 mm (3.5 in)
189843.7 mm (1.7 in)
189980.8 mm (3.2 in)
190099.8 mm (3.9 in)
1901118.7 mm (4.7 in)
190297.1 mm (3.8 in)
1903101.4 mm (4.0 in)
1920n/a
192171.1 mm (2.8 in)
192281.3 mm (3.2 in)
192386.1 mm (3.4 in)
1924124.1 mm (4.9 in)
192579.8 mm (3.1 in)
195073.9 mm (2.9 in)
1951118.6 mm (4.7 in)
1952134.4 mm (5.3 in)
195382.6 mm (3.3 in)
195473.9 mm (2.9 in)
1955155.2 mm (6.1 in)
1956116.4 mm (4.6 in)
1957115.0 mm (4.5 in)
195873.7 mm (2.9 in)
1959121.2 mm (4.8 in)
1960112.2 mm (4.4 in)
196159.4 mm (2.3 in)
196292.8 mm (3.7 in)
1963121.4 mm (4.8 in)
196488.9 mm (3.5 in)
196550.0 mm (2.0 in)
1966164.1 mm (6.5 in)
1967162.3 mm (6.4 in)
196873.9 mm (2.9 in)
196964.0 mm (2.5 in)
197073.7 mm (2.9 in)
197195.3 mm (3.8 in)
1972281.9 mm (11.1 in)
197387.9 mm (3.5 in)
197477.4 mm (3.0 in)
1975106.0 mm (4.2 in)
197670.4 mm (2.8 in)
1977111.8 mm (4.4 in)
197885.1 mm (3.4 in)
197992.9 mm (3.7 in)
198057.2 mm (2.3 in)
198163.5 mm (2.5 in)
198269.9 mm (2.8 in)
198364.5 mm (2.5 in)
198468.1 mm (2.7 in)
198522.8 mm (0.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Manassas 3 NW by year The longest dry spell of the year at Manassas 3 NW, 1895 to 1985. The record is 40 days in 1901, marked on the chart; the median year is 20 days. 01020304019001920194019601980Record: 40 days in 1901
The longest dry spell of the year at Manassas 3 NW, 1895 to 1985. The record is 40 days in 1901, marked on the chart; the median year is 20 days.
Longest dry spell (CDD) at Manassas 3 NW by year
YearLongest dry spell (CDD)
189522 days
189621 days
189713 days
189823 days
18999 days
190020 days
190140 days
190223 days
190319 days
19201 day
19217 days
192218 days
19235 days
19242 days
192525 days
195028 days
195122 days
195222 days
195320 days
195417 days
195527 days
195616 days
195718 days
195820 days
195927 days
196012 days
196115 days
196225 days
196320 days
196423 days
196530 days
196620 days
196718 days
196826 days
196937 days
197019 days
197135 days
197230 days
197326 days
197417 days
197512 days
197629 days
197719 days
197823 days
197915 days
198024 days
198117 days
198216 days
198325 days
198422 days
198512 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

24 years with a frost

Across 24 years with a frost, the median last spring frost at Manassas 3 NW falls on 15 April and the median first autumn frost on 16 October, which leaves a median of 186 days between them.

Frost dates and growing season at Manassas 3 NW
MeasureMedian, all yearsEarliest periodRecent period (1896 to 1980)Recent against earliestFitted trend
Last spring frost15 Apriln/a15 Apriln/an/a
First autumn frost16 Octobern/a16 Octobern/an/a
Growing days186 daysn/a186 daysn/an/a

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Download the Data

  • Data for Manassas 3 NW standing records by year: CSV or JSON. Field meanings are on the data page.
  • 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). Records are computed by this site and are not official.

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