NWS CLI archive · settlement source
CLIIAD · 워싱턴 D.C. · America/New_York · ← 2026-10-20 · 2026-10-22 → · All dates for KIAD · JSON · METAR-derived record
Final issued 2026-10-22 02:24:00 EDT · Product id iem:CDUS41-KLWX-220624:IAD:2026-10-21:final · IEM archive
Product id iem:CDUS41-KLWX-220624:IAD:2026-10-21:final · iem-afos · IEM archive
SHA-256 512d79989ee75998c4b7a89b10ae7b6902c3248e898a92f1113d6d7df3d11a69
Product text
CDUS41 KLWX 220624
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
224 AM EDT THU OCT 22 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 21 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 67 3:41 PM 86 1979 66 1 74
MINIMUM 42 11:58 PM 22 1972 43 -1 35
AVERAGE 55 55 0 55
PRECIPITATION (IN)
YESTERDAY 0.00 2.45 1995 0.12 -0.12 0.10
MONTH TO DATE 3.61 2.52 1.09 0.95
SINCE SEP 1 7.41 6.46 0.95 2.17
SINCE JAN 1 36.81 35.68 1.13 26.81
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 11 -1 10
MONTH TO DATE 92 158 -66 112
SINCE SEP 1 113 203 -90 119
SINCE JUL 1 113 204 -91 121
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 16 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION N (10)
AVERAGE WIND SPEED 6.2
SKY COVER
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 79 4:00 AM
LOWEST 33 2:00 PM
AVERAGE 56
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 66 85 1979
MINIMUM TEMPERATURE (F) 43 26 1974
SUNRISE AND SUNSET
OCTOBER 22 2026.......SUNRISE 7:26 AM EDT SUNSET 6:21 PM EDT
OCTOBER 23 2026.......SUNRISE 7:28 AM EDT SUNSET 6:20 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-212135:IAD:2026-10-21:interim · iem-afos · IEM archive
SHA-256 6d78546c0ba93a5e99b53826fc97a73df1d8394e3166a3c0a51f218063421593
Product text
CDUS41 KLWX 212135
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
535 PM EDT WED OCT 21 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 21 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 67 3:41 PM 86 1979 66 1 74
MINIMUM 42 4:04 AM 22 1972 43 -1 35
AVERAGE 55 55 0 55
PRECIPITATION (IN)
TODAY 0.00 2.45 1995 0.12 -0.12 0.10
MONTH TO DATE 3.61 2.52 1.09 0.95
SINCE SEP 1 7.41 6.46 0.95 2.17
SINCE JAN 1 36.81 35.68 1.13 26.81
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 11 -1 10
MONTH TO DATE 92 158 -66 112
SINCE SEP 1 113 203 -90 119
SINCE JUL 1 113 204 -91 121
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 16 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION N (10)
AVERAGE WIND SPEED 7.1
SKY COVER
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 79 4:00 AM
LOWEST 33 2:00 PM
AVERAGE 56
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 66 85 1979
MINIMUM TEMPERATURE (F) 43 26 1974
SUNRISE AND SUNSET
OCTOBER 21 2026.......SUNRISE 7:25 AM EDT SUNSET 6:23 PM EDT
OCTOBER 22 2026.......SUNRISE 7:26 AM EDT SUNSET 6:21 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/2026-10-21 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.