NWS CLI archive · settlement source
CLIIAD · 워싱턴 D.C. · America/New_York · ← 2026-10-23 · 2026-10-25 → · All dates for KIAD · JSON · METAR-derived record
Final issued 2026-10-25 02:26:00 EDT · Product id iem:CDUS41-KLWX-250626:IAD:2026-10-24:final · IEM archive
Product id iem:CDUS41-KLWX-250626:IAD:2026-10-24:final · iem-afos · IEM archive
SHA-256 2b0c27cdd63e870f91aa03f65f94454324f553d3d4a2c91f5f72b432b9471964
Product text
CDUS41 KLWX 250626
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
226 AM EDT SUN OCT 25 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 24 2026...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1960 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 63 3:41 PM 84 2001 65 -2 60
MINIMUM 36 3:49 AM 15 1969 42 -6 33
AVERAGE 50 54 -4 47
PRECIPITATION (IN)
YESTERDAY 0.00 1.69 2009 0.11 -0.11 0.00
MONTH TO DATE 3.61 2.87 0.74 0.97
SINCE SEP 1 7.41 6.81 0.60 2.19
SINCE JAN 1 36.81 36.03 0.78 26.83
SNOWFALL (IN)
YESTERDAY 0.0 MM MM 0.0 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0 0.0
SINCE SEP 1 0.0 0.0 0.0 0.0
SINCE JUL 1 0.0 0.0 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 15 12 3 18
MONTH TO DATE 132 192 -60 153
SINCE SEP 1 153 237 -84 160
SINCE JUL 1 153 238 -85 162
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 44 19 25 12
SINCE SEP 1 268 171 97 182
SINCE JAN 1 1548 1227 321 1330
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION E (110)
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION SE (140)
AVERAGE WIND SPEED 2.1
SKY COVER
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 7:00 AM
LOWEST 42 2:00 PM
AVERAGE 71
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 65 81 2023
MINIMUM TEMPERATURE (F) 42 27 1969
SUNRISE AND SUNSET
OCTOBER 25 2026.......SUNRISE 7:30 AM EDT SUNSET 6:18 PM EDT
OCTOBER 26 2026.......SUNRISE 7:31 AM EDT SUNSET 6:16 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$Product id iem:CDUS41-KLWX-242124:IAD:2026-10-24:interim · iem-afos · IEM archive
SHA-256 ce8c2e5d2cbb34f41f4019ea3413f9cf944259a26915de9b1db4e2107bdf07e3
Product text
CDUS41 KLWX 242124
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
524 PM EDT SAT OCT 24 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 24 2026...
VALID TODAY AS OF 0500 PM LOCAL TIME.
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1960 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
TODAY
MAXIMUM 63 3:41 PM 84 2001 65 -2 60
MINIMUM 36 3:49 AM 15 1969 42 -6 33
AVERAGE 50 54 -4 47
PRECIPITATION (IN)
TODAY 0.00 1.69 2009 0.11 -0.11 0.00
MONTH TO DATE 3.61 2.87 0.74 0.97
SINCE SEP 1 7.41 6.81 0.60 2.19
SINCE JAN 1 36.81 36.03 0.78 26.83
SNOWFALL (IN)
TODAY 0.0 MM MM 0.0 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0 0.0
SINCE SEP 1 0.0 0.0 0.0 0.0
SINCE JUL 1 0.0 0.0 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 15 12 3 18
MONTH TO DATE 132 192 -60 153
SINCE SEP 1 153 237 -84 160
SINCE JUL 1 153 238 -85 162
COOLING
TODAY 0 0 0 0
MONTH TO DATE 44 19 25 12
SINCE SEP 1 268 171 97 182
SINCE JAN 1 1548 1227 321 1330
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION E (110)
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION SE (140)
AVERAGE WIND SPEED 1.8
SKY COVER
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 7:00 AM
LOWEST 42 2:00 PM
AVERAGE 71
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 65 81 2023
MINIMUM TEMPERATURE (F) 42 27 1969
SUNRISE AND SUNSET
OCTOBER 24 2026.......SUNRISE 7:29 AM EDT SUNSET 6:19 PM EDT
OCTOBER 25 2026.......SUNRISE 7:30 AM EDT SUNSET 6:18 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$Settlement source: the final NWS Climatological Report (CLI) for station KIAD for the contract date, as archived verbatim at https://weathermarket.io/nws-cli/KIAD/2026-10-24 with links to the NWS product and the IEM archive. A CORRECTED re-issue published before the settlement time supersedes earlier issues.
The settlement value for a date is the latest final CLI issued for that date; a corrected re-issue supersedes earlier issues. Interim same-day products never settle. This is the same rule that fills values.nwsOfficial in /api/station/{icao}/daily.
Every issue is stored verbatim as received - nothing is edited or re-derived. Products are held from 2026-09-01 (backfilled from the IEM AFOS archive) and ingested live from api.weather.gov since 2026-11-10, polled every 30 minutes. A date with no final CLI 14 hours after local midnight is reported as not_issued rather than filled in.