Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Reston. 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 Reston, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
8.0 C (46.4 F)
-45.0 C (-49.0 F)
n/a
n/a
Feb
11.1 C (52.0 F)
-41.1 C (-42.0 F)
n/a
n/a
Mar
21.7 C (71.1 F)
-44.4 C (-47.9 F)
n/a
n/a
Apr
36.0 C (96.8 F)
-25.5 C (-13.9 F)
n/a
n/a
May
39.0 C (102.2 F)
-10.0 C (14.0 F)
n/a
n/a
Jun
38.0 C (100.4 F)
-3.3 C (26.1 F)
n/a
n/a
Jul
36.7 C (98.1 F)
3.3 C (37.9 F)
n/a
n/a
Aug
39.4 C (102.9 F)
0.6 C (33.1 F)
n/a
n/a
Sep
34.5 C (94.1 F)
-7.8 C (18.0 F)
n/a
n/a
Oct
30.6 C (87.1 F)
-17.2 C (1.0 F)
n/a
n/a
Nov
21.7 C (71.1 F)
-34.4 C (-29.9 F)
n/a
n/a
Dec
12.8 C (55.0 F)
-43.0 C (-45.4 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Reston still stand. 1964 holds the most, with 83.
Standing records at Reston by the year they were set
Year set
Standing records
1952
49
1953
52
1954
58
1955
56
1956
62
1957
60
1958
63
1959
76
1960
40
1961
56
1962
61
1963
75
1964
83
1965
45
1966
49
1967
30
1968
47
1969
35
1970
28
1971
25
1972
42
1973
58
1974
29
1975
13
1976
26
1977
46
1978
21
1979
41
1980
37
1981
49
1982
22
1983
30
Wettest Day of Each Month
Aug: 98.0 mm (3.9 in)
The wettest day on record for each calendar month at Reston. The most was 98.0 mm (3.9 in) on 10 August 1962.
Record daily precipitation for each month at Reston
Month
Record daily precipitation (mm)
Date
Jan
17.8 mm (0.7 in)
22 January 1969
Feb
15.2 mm (0.6 in)
14 February 1962
Mar
25.4 mm (1.0 in)
18 March 1964
Apr
40.6 mm (1.6 in)
28 April 1970
May
50.3 mm (2.0 in)
23 May 1965
Jun
67.1 mm (2.6 in)
28 June 1952
Jul
34.8 mm (1.4 in)
21 July 1959
Aug
98.0 mm (3.9 in)
10 August 1962
Sep
82.0 mm (3.2 in)
3 September 1965
Oct
31.8 mm (1.3 in)
1 October 1971
Nov
20.3 mm (0.8 in)
16 November 1968
Dec
12.7 mm (0.5 in)
14 December 1953
Period of Record Coverage
1952 to 1983
Complete yearUnder 90 percent of days
32 years of record at Reston, 1952 to 1983. 22 years have data for under 90 percent of days and are left out of rankings: 1952, 1954, 1955, 1965, 1966, 1967, 1968, 1969 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 10 complete years at Reston, 1953 to 1964. Blue stripes are years cooler than the station's own mean of 2.8 C (37.0 F); red stripes are warmer. The coolest year was 1956, at 1.4 C (34.5 F), and the warmest was 1963, at 3.9 C (39.1 F). The strongest colour marks a difference of 1.4 C (2.5 F).
Annual mean temperature at Reston as warming stripes, 1953 to 1964
Year
Annual mean temperature
Difference from the station mean
1953
3.9 C
+1.13 C
1956
1.4 C
-1.37 C
1957
2.1 C
-0.69 C
1958
3.0 C
+0.17 C
1959
2.5 C
-0.27 C
1960
2.6 C
-0.16 C
1961
3.3 C
+0.49 C
1962
2.7 C
-0.13 C
1963
3.9 C
+1.15 C
1964
2.5 C
-0.28 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
1952 to 1983
Yearly extremes at Reston: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
39.4 C (102.9 F)
1961
33.3 C (91.9 F)
32
Coldest night (TNn)
-45.0 C (-49.0 F)
1966
-37.2 C (-35.0 F)
32
Wettest day (Rx1day)
98.0 mm (3.9 in)
1962
31.3 mm (1.2 in)
32
Wettest five days (Rx5day)
98.5 mm (3.9 in)
1963
43.8 mm (1.7 in)
32
Longest dry spell (CDD)
80 days
1981
33 days
32
Hottest day (TXx)
The hottest day of the year at Reston, 1952 to 1983. The record is 39.4 C (102.9 F) in 1961, marked on the chart; the median year is 33.3 C (91.9 F).
Hottest day (TXx) at Reston by year
Year
Hottest day (TXx)
1952
38.3 C (100.9 F)
1953
33.9 C (93.0 F)
1954
32.2 C (90.0 F)
1955
36.1 C (97.0 F)
1956
33.3 C (91.9 F)
1957
36.1 C (97.0 F)
1958
35.6 C (96.1 F)
1959
35.6 C (96.1 F)
1960
36.7 C (98.1 F)
1961
39.4 C (102.9 F)
1962
33.9 C (93.0 F)
1963
36.1 C (97.0 F)
1964
32.8 C (91.0 F)
1965
30.0 C (86.0 F)
1966
33.3 C (91.9 F)
1967
32.8 C (91.0 F)
1968
34.4 C (93.9 F)
1969
33.3 C (91.9 F)
1970
33.9 C (93.0 F)
1971
30.6 C (87.1 F)
1972
32.2 C (90.0 F)
1973
33.3 C (91.9 F)
1974
32.8 C (91.0 F)
1975
31.1 C (88.0 F)
1976
32.2 C (90.0 F)
1977
35.0 C (95.0 F)
1978
32.2 C (90.0 F)
1979
38.0 C (100.4 F)
1980
39.0 C (102.2 F)
1981
32.5 C (90.5 F)
1982
29.0 C (84.2 F)
1983
31.5 C (88.7 F)
Coldest night (TNn)
The coldest night of the year at Reston, 1952 to 1983. The record is -45.0 C (-49.0 F) in 1966, marked on the chart; the median year is -37.2 C (-35.0 F).
Coldest night (TNn) at Reston by year
Year
Coldest night (TNn)
1952
-23.3 C (-9.9 F)
1953
-36.1 C (-33.0 F)
1954
-43.3 C (-45.9 F)
1955
-36.1 C (-33.0 F)
1956
-37.2 C (-35.0 F)
1957
-35.0 C (-31.0 F)
1958
-36.7 C (-34.1 F)
1959
-35.6 C (-32.1 F)
1960
-35.6 C (-32.1 F)
1961
-37.8 C (-36.0 F)
1962
-44.4 C (-47.9 F)
1963
-34.4 C (-29.9 F)
1964
-37.2 C (-35.0 F)
1965
-36.7 C (-34.1 F)
1966
-45.0 C (-49.0 F)
1967
-38.9 C (-38.0 F)
1968
-39.4 C (-38.9 F)
1969
-37.2 C (-35.0 F)
1970
-38.9 C (-38.0 F)
1971
-37.2 C (-35.0 F)
1972
-38.3 C (-36.9 F)
1973
-36.1 C (-33.0 F)
1974
-40.0 C (-40.0 F)
1975
-35.6 C (-32.1 F)
1976
-36.1 C (-33.0 F)
1977
-39.4 C (-38.9 F)
1978
-39.4 C (-38.9 F)
1979
-41.0 C (-41.8 F)
1980
-36.5 C (-33.7 F)
1981
-33.0 C (-27.4 F)
1982
-35.5 C (-31.9 F)
1983
-43.0 C (-45.4 F)
Wettest day (Rx1day)
The wettest day of the year at Reston, 1952 to 1983. The record is 98.0 mm (3.9 in) in 1962, marked on the chart; the median year is 31.3 mm (1.2 in).
Wettest day (Rx1day) at Reston by year
Year
Wettest day (Rx1day)
1952
67.1 mm (2.6 in)
1953
19.3 mm (0.8 in)
1954
64.0 mm (2.5 in)
1955
39.4 mm (1.6 in)
1956
50.0 mm (2.0 in)
1957
44.5 mm (1.8 in)
1958
17.0 mm (0.7 in)
1959
34.8 mm (1.4 in)
1960
30.7 mm (1.2 in)
1961
24.1 mm (0.9 in)
1962
98.0 mm (3.9 in)
1963
37.3 mm (1.5 in)
1964
27.7 mm (1.1 in)
1965
82.0 mm (3.2 in)
1966
11.4 mm (0.4 in)
1967
15.5 mm (0.6 in)
1968
30.5 mm (1.2 in)
1969
30.5 mm (1.2 in)
1970
40.6 mm (1.6 in)
1971
50.8 mm (2.0 in)
1972
27.9 mm (1.1 in)
1973
31.8 mm (1.3 in)
1974
25.4 mm (1.0 in)
1975
48.3 mm (1.9 in)
1976
20.3 mm (0.8 in)
1977
38.1 mm (1.5 in)
1978
30.5 mm (1.2 in)
1979
15.5 mm (0.6 in)
1980
32.2 mm (1.3 in)
1981
21.0 mm (0.8 in)
1982
39.0 mm (1.5 in)
1983
13.0 mm (0.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Reston, 1952 to 1983. The record is 98.5 mm (3.9 in) in 1963, marked on the chart; the median year is 43.8 mm (1.7 in).
Wettest five days (Rx5day) at Reston by year
Year
Wettest five days (Rx5day)
1952
72.9 mm (2.9 in)
1953
36.1 mm (1.4 in)
1954
89.7 mm (3.5 in)
1955
58.2 mm (2.3 in)
1956
61.7 mm (2.4 in)
1957
60.0 mm (2.4 in)
1958
31.8 mm (1.3 in)
1959
72.1 mm (2.8 in)
1960
43.7 mm (1.7 in)
1961
32.1 mm (1.3 in)
1962
98.0 mm (3.9 in)
1963
98.5 mm (3.9 in)
1964
43.4 mm (1.7 in)
1965
82.0 mm (3.2 in)
1966
24.9 mm (1.0 in)
1967
22.1 mm (0.9 in)
1968
40.9 mm (1.6 in)
1969
83.1 mm (3.3 in)
1970
51.5 mm (2.0 in)
1971
54.9 mm (2.2 in)
1972
31.8 mm (1.3 in)
1973
48.8 mm (1.9 in)
1974
25.4 mm (1.0 in)
1975
71.1 mm (2.8 in)
1976
40.6 mm (1.6 in)
1977
60.9 mm (2.4 in)
1978
38.1 mm (1.5 in)
1979
23.0 mm (0.9 in)
1980
43.8 mm (1.7 in)
1981
29.0 mm (1.1 in)
1982
43.0 mm (1.7 in)
1983
18.0 mm (0.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Reston, 1952 to 1983. The record is 80 days in 1981, marked on the chart; the median year is 33 days.
Longest dry spell (CDD) at Reston by year
Year
Longest dry spell (CDD)
1952
37 days
1953
22 days
1954
68 days
1955
24 days
1956
25 days
1957
29 days
1958
34 days
1959
32 days
1960
64 days
1961
57 days
1962
21 days
1963
30 days
1964
16 days
1965
48 days
1966
50 days
1967
24 days
1968
64 days
1969
26 days
1970
20 days
1971
39 days
1972
18 days
1973
42 days
1974
70 days
1975
18 days
1976
70 days
1977
40 days
1978
51 days
1979
21 days
1980
63 days
1981
80 days
1982
21 days
1983
13 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.
Download the Data
Data for Reston standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Reston 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.