Virginia · THREADEX · 1960–2026
Sterling-Dulles Airport, VA
38.935°N, 77.447°W · station IADthr · 67 years of record
99°F
forecast high · Jul 15
7-Day Forecast
NWS NDFD forecast high temperature for Sterling-Dulles Airport.
This Day in History · Jul 15
Today ranks
#1 / 65
warmest Jul 15 in 65 yrs of record
Hottest Jul 15 ever
98°F
set in 1995
Coolest Jul 15 ever
77°F
set in 1967
Hottest Jul 15 — Year by Year
Every year's high on Jul 15 at Sterling-Dulles Airport. The forecast line shows where today lands; the ringed bar is the hottest on record.
The Numbers
| Forecast high · Jul 15 | 99°F |
| Hottest this date since | on record |
| This-date record | 98°F |
| This-date rank | #1 of 65 |
| Hottest at any time since | 2026 |
| All-time record | 105°F (2011) |
| Odds to tie/break | 100.0% (daily) |
| Period of record | 1960–2026 |
Record Book
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°F2024 | -18°F1984 |
| Feb | 80°F2018 | -14°F1979 |
| Mar | 89°F1990 | -1°F1993 |
| Apr | 93°F1960 | 17°F1969 |
| May | 97°F1969 | 28°F1970 |
| Jun | 102°F2012 | 36°F1977 |
| Jul | 105°F2011 | 41°F1988 |
| Aug | 104°F1983 | 38°F1982 |
| Sep | 100°F2023 | 30°F1974 |
| Oct | 96°F2019 | 15°F1969 |
| Nov | 84°F1971 | 9°F1989 |
| Dec | 79°F1998 | -4°F1989 |
| All-time | 105°F2011 | -18°F1984 |
2026 Records So Far
Records set or tied at Sterling-Dulles Airport so far this year — through Jul 11.
Record Highs in 2026
13 broke
plus 2 tied — daily record highs set this year
Record Lows in 2026
1 broke
plus 0 tied — daily record lows set this year
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
15 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: 88°F · forecast is +10° vs normal.
Sun & Location
Sun & Daylight Today
| Sunrise | 4:55 AM |
| Sunset | 7:36 PM |
| Solar noon | 12:15 PM |
| Daylight | 14h 41m · losing 7 min/wk |
Local standard time (no DST), level horizon.
Location
Nearby Stations
Washington, DC23 mi EMartinsburg, WV43 mi NWBaltimore, MD44 mi EBaltimore Downtown, MD50 mi EAnnapolis, MD51 mi EHagerstown, MD55 mi N
The Last 6 Weeks
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.
Every Day Since 1960
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 Jul 15 each year, so you can see whether 2026 is running hot. Pick a threshold:
15 days ≥90°F so far in 2026 — tied for the 18th most in 67 years. Normal for this point: 12. Record: 25 in 1994.
Share Card
A ready-to-share summary of Sterling-Dulles Airport's outlook — post it, or link this page.
Hottest Since · Browse all states · See where it's coldest → coldestsince.com
part of Weather Trader · supported by Substack Subscribers · data: NWS NDFD forecast + NOAA/ACIS ThreadEx records · updated 2026-07-13T13:58:11Z
© 2026 Weather Trader · All rights reserved
part of Weather Trader · supported by Substack Subscribers · data: NWS NDFD forecast + NOAA/ACIS ThreadEx records · updated 2026-07-13T13:58:11Z
© 2026 Weather Trader · All rights reserved