NWS CLI archive · settlement source
CLIIAD · 워싱턴 D.C. · America/New_York · ← 2026-10-29 · 2026-10-31 → · All dates for KIAD · JSON · METAR-derived record
Final issued 2026-10-31 02:27:00 EDT · Product id iem:CDUS41-KLWX-310627:IAD:2026-10-30:final · IEM archive
Product id iem:CDUS41-KLWX-310627:IAD:2026-10-30:final · iem-afos · IEM archive
SHA-256 aebd0285407fc7116e17d00e43b4f55f84b8710f867abf139d34ba9fb8afb8d5
Product text
CDUS41 KLWX 310627
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
227 AM EDT SAT OCT 31 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 30 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 76 2:16 PM 84 2016 63 13 66
MINIMUM 50 4:49 AM 20 1969 40 10 48
AVERAGE 63 51 12 57
PRECIPITATION (IN)
YESTERDAY 0.00 1.00 2012 0.11 -0.11 0.58
MONTH TO DATE 3.61 3.54 0.07 2.13
SINCE SEP 1 7.41 7.48 -0.07 3.35
SINCE JAN 1 36.81 36.70 0.11 27.99
SNOWFALL (IN)
YESTERDAY 0.0 MM MM 0.0 0.0 MM
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 2 14 -12 8
MONTH TO DATE 175 269 -94 241
SINCE SEP 1 196 314 -118 248
SINCE JUL 1 196 315 -119 250
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 23 HIGHEST WIND DIRECTION W (290)
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION N (340)
AVERAGE WIND SPEED 8.8
SKY COVER
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 6:00 AM
LOWEST 23 3:00 PM
AVERAGE 60
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 62 83 2024
MINIMUM TEMPERATURE (F) 40 21 1968
SUNRISE AND SUNSET
OCTOBER 31 2026.......SUNRISE 7:36 AM EDT SUNSET 6:10 PM EDT
NOVEMBER 1 2026......SUNRISE 6:37 AM EST SUNSET 5:09 PM EST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$Product id iem:CDUS41-KLWX-302126:IAD:2026-10-30:interim · iem-afos · IEM archive
SHA-256 8b02e8fba650b3ce9250345b9e253161b003e52c6e53600eadde8da14ab143b5
Product text
CDUS41 KLWX 302126
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
526 PM EDT FRI OCT 30 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 30 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 76 2:16 PM 84 2016 63 13 66
MINIMUM 50 4:49 AM 20 1969 40 10 48
AVERAGE 63 51 12 57
PRECIPITATION (IN)
TODAY 0.00 1.00 2012 0.11 -0.11 0.58
MONTH TO DATE 3.61 3.54 0.07 2.13
SINCE SEP 1 7.41 7.48 -0.07 3.35
SINCE JAN 1 36.81 36.70 0.11 27.99
SNOWFALL (IN)
TODAY 0.0 MM MM 0.0 0.0 MM
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 2 14 -12 8
MONTH TO DATE 175 269 -94 241
SINCE SEP 1 196 314 -118 248
SINCE JUL 1 196 315 -119 250
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 23 HIGHEST WIND DIRECTION W (290)
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION N (340)
AVERAGE WIND SPEED 7.9
SKY COVER
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
HAZE
SANDSTORM
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 6:00 AM
LOWEST 23 3:00 PM
AVERAGE 60
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 62 83 2024
MINIMUM TEMPERATURE (F) 40 21 1968
SUNRISE AND SUNSET
OCTOBER 30 2026.......SUNRISE 7:35 AM EDT SUNSET 6:11 PM EDT
OCTOBER 31 2026.......SUNRISE 7:36 AM EDT SUNSET 6:10 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/2026-10-30 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.