NWS CLI archive · settlement source
CLIIAD · 워싱턴 D.C. · America/New_York · ← 2026-10-03 · 2026-10-05 → · All dates for KIAD · JSON · METAR-derived record
Final issued 2026-10-05 02:21:00 EDT · Product id iem:CDUS41-KLWX-050621:IAD:2026-10-04:final · IEM archive
Product id iem:CDUS41-KLWX-050621:IAD:2026-10-04:final · iem-afos · IEM archive
SHA-256 5d44fc7fae469283bb651190533e29d059eaaf920802f5bb967db95b2c21a92c
Product text
CDUS41 KLWX 050621
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
221 AM EDT MON OCT 05 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 4 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 64 4:51 PM 90 2013 72 -8 81
MINIMUM 60 11:59 PM 26 1974 50 10 45
AVERAGE 62 61 1 63
PRECIPITATION (IN)
YESTERDAY 0.07 0.81 1999 0.13 -0.06 0.00
MONTH TO DATE 0.40 0.51 -0.11 0.00
SINCE SEP 1 4.20 4.45 -0.25 1.22
SINCE JAN 1 33.60 33.67 -0.07 25.86
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 3 5 -2 2
MONTH TO DATE 5 19 -14 16
SINCE SEP 1 26 64 -38 23
SINCE JUL 1 26 65 -39 25
COOLING
YESTERDAY 0 2 -2 0
MONTH TO DATE 19 8 11 0
SINCE SEP 1 217 160 57 170
SINCE JAN 1 1497 1216 281 1318
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION E (70)
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION E (70)
AVERAGE WIND SPEED 3.8
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 4:00 AM
LOWEST 90 12:00 AM
AVERAGE 95
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 72 90 1967
2013
MINIMUM TEMPERATURE (F) 50 32 1970
SUNRISE AND SUNSET
OCTOBER 5 2026.......SUNRISE 7:10 AM EDT SUNSET 6:46 PM EDT
OCTOBER 6 2026.......SUNRISE 7:11 AM EDT SUNSET 6:45 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-042129:IAD:2026-10-04:interim · iem-afos · IEM archive
SHA-256 8422e83ae7d7f5e63e101e7b5e17e4d7e0a83889d054bfb9a784d18134491727
Product text
CDUS41 KLWX 042129
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
529 PM EDT SUN OCT 04 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 4 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 64 3:59 PM 90 2013 72 -8 81
MINIMUM 60 8:29 AM 26 1974 50 10 45
AVERAGE 62 61 1 63
PRECIPITATION (IN)
TODAY 0.07 0.81 1999 0.13 -0.06 0.00
MONTH TO DATE 0.40 0.51 -0.11 0.00
SINCE SEP 1 4.20 4.45 -0.25 1.22
SINCE JAN 1 33.60 33.67 -0.07 25.86
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 3 5 -2 2
MONTH TO DATE 5 19 -14 16
SINCE SEP 1 26 64 -38 23
SINCE JUL 1 26 65 -39 25
COOLING
TODAY 0 2 -2 0
MONTH TO DATE 19 8 11 0
SINCE SEP 1 217 160 57 170
SINCE JAN 1 1497 1216 281 1318
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION E (70)
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION E (70)
AVERAGE WIND SPEED 4.1
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 4:00 AM
LOWEST 90 12:00 AM
AVERAGE 95
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 72 90 1967
2013
MINIMUM TEMPERATURE (F) 50 32 1970
SUNRISE AND SUNSET
OCTOBER 4 2026.......SUNRISE 7:09 AM EDT SUNSET 6:48 PM EDT
OCTOBER 5 2026.......SUNRISE 7:10 AM EDT SUNSET 6:46 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/2026-10-04 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.