38.935°N, 77.447°W · station IADthr · 67 years of record
66°F
HOTTEST OCT 23 SINCE 2024
forecast high · Oct 23
7-Day Forecast
NWS NDFD forecast high temperature for Sterling-Dulles Airport.
This Day in History
Every year's high on each of the next 7 forecast dates at Sterling-Dulles Airport — toggle a day below. The forecast line shows where it lands; the ringed bar is the hottest on record.
Ranks
#58 / 63
warmest Oct 17 in 63 yrs of record
Warmest Oct 17 ever
83°F
set in 1963
Coolest Oct 17 ever
45°F
set in 2009
Forecast high 54°F — 58th warmest Oct 17 of 63 years · record 83°F (1963) · warmest since 2025.
Ranks
#56 / 63
warmest Oct 18 in 63 yrs of record
Warmest Oct 18 ever
84°F
set in 2016
Coolest Oct 18 ever
49°F
set in 1976
Forecast high 56°F — 56th warmest Oct 18 of 63 years · record 84°F (2016) · warmest since 2025.
Ranks
#56 / 63
warmest Oct 19 in 63 yrs of record
Warmest Oct 19 ever
85°F
set in 2016
Coolest Oct 19 ever
46°F
set in 1974
Forecast high 57°F — 56th warmest Oct 19 of 63 years · record 85°F (2016) · warmest since 2025.
Ranks
#40 / 63
warmest Oct 20 in 63 yrs of record
Warmest Oct 20 ever
87°F
set in 2016
Coolest Oct 20 ever
42°F
set in 1972
Forecast high 63°F — 40th warmest Oct 20 of 63 years · record 87°F (2016) · warmest since 2025.
Ranks
#41 / 63
warmest Oct 21 in 63 yrs of record
Warmest Oct 21 ever
86°F
set in 1979
Coolest Oct 21 ever
49°F
set in 1972
Forecast high 63°F — 41st warmest Oct 21 of 63 years · record 86°F (1979) · warmest since 2025.
Ranks
#43 / 63
warmest Oct 22 in 63 yrs of record
Warmest Oct 22 ever
85°F
set in 1979
Coolest Oct 22 ever
51°F
set in 1988
Forecast high 61°F — 43rd warmest Oct 22 of 63 years · record 85°F (1979) · warmest since 2025.
Ranks
#36 / 63
warmest Oct 23 in 63 yrs of record
Warmest Oct 23 ever
85°F
set in 1978
Coolest Oct 23 ever
48°F
set in 1969
Forecast high 66°F — 36th warmest Oct 23 of 63 years · record 85°F (1978) · warmest since 2024.
The hottest and coldest ever recorded at Sterling-Dulles Airport in each calendar month, and for the whole 1960–2026 record — with the year each was set.
Month
Record High
Record Low
Jan
79°FJan 26, 2024
-18°FJan 22, 1984
Feb
80°FFeb 21, 2018
-14°FFeb 18, 1979
Mar
89°FMar 12, 1990
-1°FMar 15, 1993
Apr
93°FApr 25, 1960
17°FApr 1, 1969
May
97°FMay 29, 1969
28°FMay 7, 1970
Jun
102°FJun 29, 2012
36°FJun 8, 1977
Jul
105°FJul 22, 2011
41°FJul 1, 1988
Aug
104°FAug 20, 1983
38°FAug 29, 1982
Sep
100°FSep 6, 2023
30°FSep 24, 1974
Oct
96°FOct 2, 2019
15°FOct 24, 1969
Nov
84°FNov 2, 1971
9°FNov 24, 1989
Dec
79°FDec 6, 1998
-4°FDec 25, 1989
All-time
105°FJul 22, 2011
-18°FJan 22, 1984
2026 Records So Far
Records set or tied at Sterling-Dulles Airport so far this year — through Oct 15.
Record Highs in 2026
14 broke
plus 3 tied — daily record highs set this year
Record Lows in 2026
1 broke
plus 0 tied — daily record lows set this year
Record Warm Nights & Cold Days
Two more daily records, kept separate from the rankings: the warmest a night has ever stayed (record high minimum) and the coldest a day has ever gotten (record low maximum) — the flip side of the usual record high and low.
Warmest low ever
81°F
record high minimum — the night it never cooled · Jul 16, 2026
Coldest high ever
6°F
record low maximum — the day it never warmed · Jan 19, 1994
Month
Warmest low
Coldest high
Jan
62°FJan 8, 1998
6°FJan 19, 1994
Feb
59°FFeb 21, 2018
8°FFeb 18, 1979
Mar
66°FMar 30, 2025
18°FMar 1, 1980
Apr
68°FApr 27, 2011
38°FApr 8, 1972
May
71°FMay 31, 1991
47°FMay 1, 1963
Jun
78°FJun 23, 2024
56°FJun 3, 1997
Jul
81°FJul 16, 2026
66°FJul 13, 1990
Aug
79°FAug 8, 2007
64°FAug 12, 1979
Sep
77°FSep 3, 1993
47°FSep 28, 1984
Oct
73°FOct 8, 2017
39°FOct 30, 2002
Nov
68°FNov 1, 1971
30°FNov 30, 1976
Dec
63°FDec 24, 2015
11°FDec 25, 1983
All-time
81°FJul 16, 2026
6°FJan 19, 1994
Hot Streaks
Current run
0 days
consecutive days with a high ≥ 90°F
Longest ever
16 days
record run, ended Aug 5 1995
So far in 2026
31 days
days with a high ≥ 90°F this year
Climate Normals
Normal high & low by month, from Sterling-Dulles Airport's own 1991–2020 record. Today's normal high: 65°F · forecast is +1° vs normal.
Sterling-Dulles Airport's observed daily high for the last six weeks — a white ring marks any day that broke or tied its daily record for that date.
2026 So Far
Every day this year against Sterling-Dulles Airport's own record — the record high, the normal, and the full span ever seen. A shareable look at where the year stands.
Each cell is one day's high at Sterling-Dulles Airport, coloured by temperature — 67 years of record, so heat waves read as warm streaks and cold snaps as blue.
Days Above the Mark
How many days a year hit a given high at Sterling-Dulles Airport — counted through Oct 23 each year, so you can see whether 2026 is running hot. Pick a threshold:
31 days ≥90°F so far in 2026 — tied for the 32nd most in 67 years. Normal for this point: 30. Record: 58 in 2010.
Share Card
A ready-to-share summary of Sterling-Dulles Airport's outlook — post it, or link this page.
