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
Record highRecord low2026 daily maximum2026 daily minimum
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
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
25.0 C (77.0 F)
-22.2 C (-8.0 F)
n/a
n/a
Feb
24.4 C (75.9 F)
-29.4 C (-20.9 F)
n/a
n/a
Mar
29.4 C (84.9 F)
-20.6 C (-5.1 F)
n/a
n/a
Apr
35.0 C (95.0 F)
-7.2 C (19.0 F)
n/a
n/a
May
35.6 C (96.1 F)
-1.7 C (28.9 F)
n/a
n/a
Jun
37.8 C (100.0 F)
4.4 C (39.9 F)
n/a
n/a
Jul
40.0 C (104.0 F)
8.9 C (48.0 F)
n/a
n/a
Aug
39.4 C (102.9 F)
4.4 C (39.9 F)
n/a
n/a
Sep
38.3 C (100.9 F)
0.6 C (33.1 F)
n/a
n/a
Oct
33.9 C (93.0 F)
-7.2 C (19.0 F)
n/a
n/a
Nov
29.4 C (84.9 F)
-12.8 C (9.0 F)
n/a
n/a
Dec
23.9 C (75.0 F)
-18.9 C (-2.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
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 set
Standing records
1895
46
1896
59
1897
34
1898
47
1899
50
1900
54
1901
49
1902
37
1903
24
1950
32
1951
38
1952
41
1953
34
1954
57
1955
32
1956
47
1957
45
1958
35
1959
42
1960
43
1961
34
1962
24
1963
27
1964
30
1965
30
1966
32
1967
46
1968
30
1969
18
1970
29
1971
32
1972
22
1973
23
1974
35
1975
13
1976
18
1977
28
1978
17
1979
34
1980
31
1981
20
1982
15
1983
18
1984
10
1985
2
All-Time Record Progression
1 new 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.
When Manassas 3 NW set new all-time records
Date
Kind
Detail
1980-07-16
Record high maximum temperature
Record high maximum temperature 40.0 C (104.0 F)
Wettest Day of Each Month
Jun: 241.3 mm (9.5 in)
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
Month
Record daily precipitation (mm)
Date
Jan
89.4 mm (3.5 in)
27 January 1897
Feb
88.9 mm (3.5 in)
2 February 1897
Mar
55.9 mm (2.2 in)
7 March 1967
Apr
60.2 mm (2.4 in)
14 April 1901
May
73.7 mm (2.9 in)
2 May 1962
Jun
241.3 mm (9.5 in)
21 June 1972
Jul
91.4 mm (3.6 in)
5 July 1956
Aug
71.4 mm (2.8 in)
25 August 1967
Sep
152.4 mm (6.0 in)
14 September 1966
Oct
71.1 mm (2.8 in)
19 October 1966
Nov
74.2 mm (2.9 in)
7 November 1963
Dec
83.1 mm (3.3 in)
28 December 1901
Period of Record Coverage
1895 to 1985
Complete yearUnder 90 percent of days
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.
Cooler than the station meanWarmer than the station mean
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
Year
Annual mean temperature
Difference from the station mean
1896
13.3 C
+0.13 C
1898
13.4 C
+0.17 C
1899
12.7 C
-0.52 C
1900
13.6 C
+0.43 C
1901
12.5 C
-0.68 C
1902
12.6 C
-0.57 C
1951
13.1 C
-0.10 C
1952
13.3 C
+0.12 C
1953
14.0 C
+0.75 C
1955
12.5 C
-0.74 C
1956
12.9 C
-0.27 C
1957
13.7 C
+0.53 C
1958
12.3 C
-0.95 C
1959
13.9 C
+0.66 C
1961
13.4 C
+0.18 C
1962
13.0 C
-0.26 C
1965
13.6 C
+0.39 C
1966
13.2 C
-0.05 C
1968
13.0 C
-0.22 C
1969
12.8 C
-0.46 C
1970
13.2 C
+0.03 C
1973
13.8 C
+0.54 C
1974
13.7 C
+0.53 C
1980
13.6 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
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.0 C (104.0 F)
1980
36.1 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)
1972
56.9 mm (2.2 in)
51
Wettest five days (Rx5day)
281.9 mm (11.1 in)
1972
87.0 mm (3.4 in)
50
Longest dry spell (CDD)
40 days
1901
20 days
51
Hottest day (TXx)
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
Year
Hottest day (TXx)
1895
36.7 C (98.1 F)
1896
36.7 C (98.1 F)
1897
35.6 C (96.1 F)
1898
38.3 C (100.9 F)
1899
36.1 C (97.0 F)
1900
37.2 C (99.0 F)
1901
37.2 C (99.0 F)
1902
39.4 C (102.9 F)
1903
35.0 C (95.0 F)
1920
n/a
1921
n/a
1922
n/a
1923
n/a
1924
n/a
1925
n/a
1950
33.3 C (91.9 F)
1951
36.1 C (97.0 F)
1952
36.7 C (98.1 F)
1953
38.9 C (102.0 F)
1954
39.4 C (102.9 F)
1955
35.6 C (96.1 F)
1956
36.1 C (97.0 F)
1957
37.8 C (100.0 F)
1958
35.0 C (95.0 F)
1959
37.8 C (100.0 F)
1960
35.6 C (96.1 F)
1961
35.0 C (95.0 F)
1962
36.7 C (98.1 F)
1963
36.1 C (97.0 F)
1964
36.7 C (98.1 F)
1965
36.1 C (97.0 F)
1966
38.9 C (102.0 F)
1967
35.0 C (95.0 F)
1968
37.2 C (99.0 F)
1969
37.2 C (99.0 F)
1970
35.6 C (96.1 F)
1971
36.1 C (97.0 F)
1972
35.6 C (96.1 F)
1973
37.8 C (100.0 F)
1974
36.1 C (97.0 F)
1975
35.6 C (96.1 F)
1976
36.1 C (97.0 F)
1977
39.4 C (102.9 F)
1978
36.7 C (98.1 F)
1979
36.1 C (97.0 F)
1980
40.0 C (104.0 F)
1981
36.7 C (98.1 F)
1982
36.1 C (97.0 F)
1983
39.4 C (102.9 F)
1984
32.8 C (91.0 F)
1985
35.0 C (95.0 F)
Coldest night (TNn)
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
Year
Coldest 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)
1920
n/a
1921
n/a
1922
n/a
1923
n/a
1924
n/a
1925
n/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)
1985
13.3 C (55.9 F)
Wettest day (Rx1day)
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
Year
Wettest day (Rx1day)
1895
48.3 mm (1.9 in)
1896
64.3 mm (2.5 in)
1897
89.4 mm (3.5 in)
1898
44.5 mm (1.8 in)
1899
50.8 mm (2.0 in)
1900
48.3 mm (1.9 in)
1901
83.1 mm (3.3 in)
1902
65.3 mm (2.6 in)
1903
71.1 mm (2.8 in)
1920
23.1 mm (0.9 in)
1921
50.8 mm (2.0 in)
1922
63.5 mm (2.5 in)
1923
72.4 mm (2.9 in)
1924
59.4 mm (2.3 in)
1925
56.9 mm (2.2 in)
1950
59.7 mm (2.4 in)
1951
58.4 mm (2.3 in)
1952
85.9 mm (3.4 in)
1953
49.8 mm (2.0 in)
1954
54.1 mm (2.1 in)
1955
69.9 mm (2.8 in)
1956
101.6 mm (4.0 in)
1957
74.9 mm (2.9 in)
1958
50.8 mm (2.0 in)
1959
106.7 mm (4.2 in)
1960
89.9 mm (3.5 in)
1961
48.5 mm (1.9 in)
1962
73.7 mm (2.9 in)
1963
74.2 mm (2.9 in)
1964
69.6 mm (2.7 in)
1965
35.1 mm (1.4 in)
1966
152.4 mm (6.0 in)
1967
71.4 mm (2.8 in)
1968
39.6 mm (1.6 in)
1969
51.3 mm (2.0 in)
1970
46.7 mm (1.8 in)
1971
49.5 mm (1.9 in)
1972
241.3 mm (9.5 in)
1973
71.1 mm (2.8 in)
1974
59.9 mm (2.4 in)
1975
55.9 mm (2.2 in)
1976
50.8 mm (2.0 in)
1977
53.1 mm (2.1 in)
1978
48.3 mm (1.9 in)
1979
71.1 mm (2.8 in)
1980
40.1 mm (1.6 in)
1981
40.6 mm (1.6 in)
1982
35.6 mm (1.4 in)
1983
36.8 mm (1.4 in)
1984
52.1 mm (2.1 in)
1985
20.3 mm (0.8 in)
Wettest five days (Rx5day)
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
Year
Wettest five days (Rx5day)
1895
32.0 mm (1.3 in)
1896
91.4 mm (3.6 in)
1897
89.4 mm (3.5 in)
1898
43.7 mm (1.7 in)
1899
80.8 mm (3.2 in)
1900
99.8 mm (3.9 in)
1901
118.7 mm (4.7 in)
1902
97.1 mm (3.8 in)
1903
101.4 mm (4.0 in)
1920
n/a
1921
71.1 mm (2.8 in)
1922
81.3 mm (3.2 in)
1923
86.1 mm (3.4 in)
1924
124.1 mm (4.9 in)
1925
79.8 mm (3.1 in)
1950
73.9 mm (2.9 in)
1951
118.6 mm (4.7 in)
1952
134.4 mm (5.3 in)
1953
82.6 mm (3.3 in)
1954
73.9 mm (2.9 in)
1955
155.2 mm (6.1 in)
1956
116.4 mm (4.6 in)
1957
115.0 mm (4.5 in)
1958
73.7 mm (2.9 in)
1959
121.2 mm (4.8 in)
1960
112.2 mm (4.4 in)
1961
59.4 mm (2.3 in)
1962
92.8 mm (3.7 in)
1963
121.4 mm (4.8 in)
1964
88.9 mm (3.5 in)
1965
50.0 mm (2.0 in)
1966
164.1 mm (6.5 in)
1967
162.3 mm (6.4 in)
1968
73.9 mm (2.9 in)
1969
64.0 mm (2.5 in)
1970
73.7 mm (2.9 in)
1971
95.3 mm (3.8 in)
1972
281.9 mm (11.1 in)
1973
87.9 mm (3.5 in)
1974
77.4 mm (3.0 in)
1975
106.0 mm (4.2 in)
1976
70.4 mm (2.8 in)
1977
111.8 mm (4.4 in)
1978
85.1 mm (3.4 in)
1979
92.9 mm (3.7 in)
1980
57.2 mm (2.3 in)
1981
63.5 mm (2.5 in)
1982
69.9 mm (2.8 in)
1983
64.5 mm (2.5 in)
1984
68.1 mm (2.7 in)
1985
22.8 mm (0.9 in)
Longest dry spell (CDD)
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
Year
Longest dry spell (CDD)
1895
22 days
1896
21 days
1897
13 days
1898
23 days
1899
9 days
1900
20 days
1901
40 days
1902
23 days
1903
19 days
1920
1 day
1921
7 days
1922
18 days
1923
5 days
1924
2 days
1925
25 days
1950
28 days
1951
22 days
1952
22 days
1953
20 days
1954
17 days
1955
27 days
1956
16 days
1957
18 days
1958
20 days
1959
27 days
1960
12 days
1961
15 days
1962
25 days
1963
20 days
1964
23 days
1965
30 days
1966
20 days
1967
18 days
1968
26 days
1969
37 days
1970
19 days
1971
35 days
1972
30 days
1973
26 days
1974
17 days
1975
12 days
1976
29 days
1977
19 days
1978
23 days
1979
15 days
1980
24 days
1981
17 days
1982
16 days
1983
25 days
1984
22 days
1985
12 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
Measure
Median, all years
Earliest period
Recent period (1896 to 1980)
Recent against earliest
Fitted trend
Last spring frost
15 April
n/a
15 April
n/a
n/a
First autumn frost
16 October
n/a
16 October
n/a
n/a
Growing days
186 days
n/a
186 days
n/a
n/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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.