NWS CLI archive · settlement source
CLIIAD · 워싱턴 D.C. · America/New_York · ← 2026-10-31 · 2026-11-02 → · All dates for KIAD · JSON · METAR-derived record
Final issued 2026-11-02 02:28:00 EST · Product id iem:CDUS41-KLWX-020728:IAD:2026-11-01:final · IEM archive
Product id iem:CDUS41-KLWX-020728:IAD:2026-11-01:final · iem-afos · IEM archive
SHA-256 a15d89b7e37786a29b664a02eeaa657f3ee34281772f366eb061ad37085fedd3
Product text
CDUS41 KLWX 020728
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
228 AM EST MON NOV 02 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR NOVEMBER 1 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 66 3:18 PM 84 1982 62 4 64
MINIMUM 43 7:11 AM 25 1975 40 3 40
AVERAGE 55 51 4 52
PRECIPITATION (IN)
YESTERDAY 0.00 1.07 1963 0.11 -0.11 0.00
MONTH TO DATE 0.00 0.11 -0.11 0.00
SINCE SEP 1 7.41 7.70 -0.29 3.35
SINCE JAN 1 36.81 36.92 -0.11 27.99
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 10 14 -4 13
MONTH TO DATE 10 14 -4 13
SINCE SEP 1 220 343 -123 271
SINCE JUL 1 220 344 -124 273
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE SEP 1 268 174 94 182
SINCE JAN 1 1548 1230 318 1330
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION E (100)
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION SE (120)
AVERAGE WIND SPEED 3.2
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 7:00 AM
LOWEST 37 3:00 PM
AVERAGE 67
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 62 84 1971
MINIMUM TEMPERATURE (F) 39 21 1976
SUNRISE AND SUNSET
NOVEMBER 2 2026......SUNRISE 6:38 AM EST SUNSET 5:08 PM EST
NOVEMBER 3 2026......SUNRISE 6:39 AM EST SUNSET 5:07 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-012123:IAD:2026-11-01:interim · iem-afos · IEM archive
SHA-256 9ae83eb53641b1d9c6d3c33d5dbd5e76a6bbf8c711a431b87765b023620be030
Product text
CDUS41 KLWX 012123
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
423 PM EST SUN NOV 01 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR NOVEMBER 1 2026...
VALID TODAY AS OF 0400 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 66 3:18 PM 84 1982 62 4 64
MINIMUM 43 7:11 AM 25 1975 40 3 40
AVERAGE 55 51 4 52
PRECIPITATION (IN)
TODAY 0.00 1.07 1963 0.11 -0.11 0.00
MONTH TO DATE 0.00 0.11 -0.11 0.00
SINCE SEP 1 7.41 7.70 -0.29 3.35
SINCE JAN 1 36.81 36.92 -0.11 27.99
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 10 14 -4 13
MONTH TO DATE 10 14 -4 13
SINCE SEP 1 220 343 -123 271
SINCE JUL 1 220 344 -124 273
COOLING
TODAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE SEP 1 268 174 94 182
SINCE JAN 1 1548 1230 318 1330
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION E (110)
HIGHEST GUST SPEED 13 HIGHEST GUST DIRECTION SE (140)
AVERAGE WIND SPEED 2.4
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 7:00 AM
LOWEST 37 3:00 PM
AVERAGE 67
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 62 84 1971
MINIMUM TEMPERATURE (F) 39 21 1976
SUNRISE AND SUNSET
NOVEMBER 1 2026......SUNRISE 6:37 AM EST SUNSET 5:09 PM EST
NOVEMBER 2 2026......SUNRISE 6:38 AM EST SUNSET 5:08 PM EST
- 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/2026-11-01 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.