NWS CLI archive · settlement source
CLIIAD · 워싱턴 D.C. · America/New_York · ← 2026-10-06 · 2026-10-08 → · All dates for KIAD · JSON · METAR-derived record
Final issued 2026-10-08 02:29:00 EDT · Product id iem:CDUS41-KLWX-080629:IAD:2026-10-07:final · IEM archive
Product id iem:CDUS41-KLWX-080629:IAD:2026-10-07:final · iem-afos · IEM archive
SHA-256 803e052133d2d6a3fa5813eb536ef3b4097eec59ed8d73d045e2e72b02defaad
Product text
CDUS41 KLWX 080629
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
229 AM EDT THU OCT 08 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 7 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 73 3:06 PM 91 2007 71 2 84
MINIMUM 42 6:28 AM 31 1988 49 -7 61
AVERAGE 58 60 -2 73
PRECIPITATION (IN)
YESTERDAY 0.00 3.50 2005 0.12 -0.12 0.02
MONTH TO DATE 0.40 0.88 -0.48 0.02
SINCE SEP 1 4.20 4.82 -0.62 1.24
SINCE JAN 1 33.60 34.04 -0.44 25.88
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 MM
DEGREE DAYS
HEATING
YESTERDAY 7 6 1 0
MONTH TO DATE 22 37 -15 17
SINCE SEP 1 43 82 -39 24
SINCE JUL 1 43 83 -40 26
COOLING
YESTERDAY 0 1 -1 8
MONTH TO DATE 19 12 7 12
SINCE SEP 1 243 164 79 182
SINCE JAN 1 1523 1220 303 1330
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION S (190)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION S (190)
AVERAGE WIND SPEED 6.1
SKY COVER
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 2:00 AM
LOWEST 49 2:00 PM
AVERAGE 73
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 71 92 2007
MINIMUM TEMPERATURE (F) 48 30 2001
SUNRISE AND SUNSET
OCTOBER 8 2026.......SUNRISE 7:12 AM EDT SUNSET 6:42 PM EDT
OCTOBER 9 2026.......SUNRISE 7:13 AM EDT SUNSET 6:40 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-072122:IAD:2026-10-07:interim · iem-afos · IEM archive
SHA-256 aa47cd3eecbda087a5fcef3efcbafe16102558ad24ab4b43b667ff3c30d5f77c
Product text
CDUS41 KLWX 072122
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
522 PM EDT WED OCT 07 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 7 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 73 3:06 PM 91 2007 71 2 84
MINIMUM 42 6:28 AM 31 1988 49 -7 61
AVERAGE 58 60 -2 73
PRECIPITATION (IN)
TODAY 0.00 3.50 2005 0.12 -0.12 0.02
MONTH TO DATE 0.40 0.88 -0.48 0.02
SINCE SEP 1 4.20 4.82 -0.62 1.24
SINCE JAN 1 33.60 34.04 -0.44 25.88
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 7 6 1 0
MONTH TO DATE 22 37 -15 17
SINCE SEP 1 43 82 -39 24
SINCE JUL 1 43 83 -40 26
COOLING
TODAY 0 1 -1 8
MONTH TO DATE 19 12 7 12
SINCE SEP 1 243 164 79 182
SINCE JAN 1 1523 1220 303 1330
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION S (190)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION S (190)
AVERAGE WIND SPEED 5.2
SKY COVER
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 2:00 AM
LOWEST 49 2:00 PM
AVERAGE 73
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 71 92 2007
MINIMUM TEMPERATURE (F) 48 30 2001
SUNRISE AND SUNSET
OCTOBER 7 2026.......SUNRISE 7:11 AM EDT SUNSET 6:43 PM EDT
OCTOBER 8 2026.......SUNRISE 7:12 AM EDT SUNSET 6:42 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/2026-10-07 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.