NWS CLI archive · settlement source
CLIIAD · 워싱턴 D.C. · America/New_York · ← 2026-10-24 · 2026-10-26 → · All dates for KIAD · JSON · METAR-derived record
Final issued 2026-10-26 02:25:00 EDT · Product id iem:CDUS41-KLWX-260625:IAD:2026-10-25:final · IEM archive
Product id iem:CDUS41-KLWX-260625:IAD:2026-10-25:final · iem-afos · IEM archive
SHA-256 5f00a68586a6cea1fdbfc32c89b0c59e64729e3da2f6be430fb0ccb3c7d41864
Product text
CDUS41 KLWX 260625
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
225 AM EDT MON OCT 26 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 25 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 3:28 PM 81 2023 65 1 60
MINIMUM 39 6:46 AM 27 1969 42 -3 30
AVERAGE 53 53 0 45
PRECIPITATION (IN)
YESTERDAY 0.00 3.39 1971 0.12 -0.12 0.00
MONTH TO DATE 3.61 2.99 0.62 0.97
SINCE SEP 1 7.41 6.93 0.48 2.19
SINCE JAN 1 36.81 36.15 0.66 26.83
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 12 12 0 20
MONTH TO DATE 144 204 -60 173
SINCE SEP 1 165 249 -84 180
SINCE JUL 1 165 250 -85 182
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 10 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 13 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 1.9
SKY COVER
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 10:00 PM
LOWEST 47 3:00 PM
AVERAGE 72
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 64 84 2023
MINIMUM TEMPERATURE (F) 41 26 1972
1987
1988
SUNRISE AND SUNSET
OCTOBER 26 2026.......SUNRISE 7:31 AM EDT SUNSET 6:16 PM EDT
OCTOBER 27 2026.......SUNRISE 7:32 AM EDT SUNSET 6:15 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-252124:IAD:2026-10-25:interim · iem-afos · IEM archive
SHA-256 b84d333b0d96e3a666f3042ea9005f24382d4bb6f0387b19623b8030c65c627e
Product text
CDUS41 KLWX 252124
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
524 PM EDT SUN OCT 25 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 25 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 66 3:28 PM 81 2023 65 1 60
MINIMUM 39 6:46 AM 27 1969 42 -3 30
AVERAGE 53 53 0 45
PRECIPITATION (IN)
TODAY 0.00 3.39 1971 0.12 -0.12 0.00
MONTH TO DATE 3.61 2.99 0.62 0.97
SINCE SEP 1 7.41 6.93 0.48 2.19
SINCE JAN 1 36.81 36.15 0.66 26.83
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 12 12 0 20
MONTH TO DATE 144 204 -60 173
SINCE SEP 1 165 249 -84 180
SINCE JUL 1 165 250 -85 182
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 10 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 13 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 2.8
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 6:00 AM
LOWEST 47 3:00 PM
AVERAGE 72
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 64 84 2023
MINIMUM TEMPERATURE (F) 41 26 1972
1987
1988
SUNRISE AND SUNSET
OCTOBER 25 2026.......SUNRISE 7:30 AM EDT SUNSET 6:18 PM EDT
OCTOBER 26 2026.......SUNRISE 7:31 AM EDT SUNSET 6:16 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/2026-10-25 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.