NWS CLI archive · settlement source
CLIIAD · 워싱턴 D.C. · America/New_York · ← 2026-10-10 · 2026-10-12 → · All dates for KIAD · JSON · METAR-derived record
Final issued 2026-10-12 02:28:00 EDT · Product id iem:CDUS41-KLWX-120628:IAD:2026-10-11:final · IEM archive
Product id iem:CDUS41-KLWX-120628:IAD:2026-10-11:final · iem-afos · IEM archive
SHA-256 d0c0fd492855643b9c7a56e59a6ac18da6e3f7a855ad1b5c3d1b82205f7fe6bd
Product text
CDUS41 KLWX 120628
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
228 AM EDT MON OCT 12 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 11 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 63 2:26 PM 86 2010 70 -7 73
MINIMUM 60 11:59 PM 28 1972 47 13 43
AVERAGE 62 58 4 58
PRECIPITATION (IN)
YESTERDAY 1.91 3.38 2013 0.12 1.79 T
MONTH TO DATE 2.31 1.36 0.95 0.16
SINCE SEP 1 6.11 5.30 0.81 1.38
SINCE JAN 1 35.51 34.52 0.99 26.02
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 3 8 -5 7
MONTH TO DATE 34 66 -32 45
SINCE SEP 1 55 111 -56 52
SINCE JUL 1 55 112 -57 54
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 19 16 3 12
SINCE SEP 1 243 168 75 182
SINCE JAN 1 1523 1224 299 1330
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION N (350)
AVERAGE WIND SPEED 9.6
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HEAVY RAIN
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 2:00 PM
LOWEST 80 12:00 AM
AVERAGE 89
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 83 1995
2010
MINIMUM TEMPERATURE (F) 47 25 1964
SUNRISE AND SUNSET
OCTOBER 12 2026.......SUNRISE 7:16 AM EDT SUNSET 6:36 PM EDT
OCTOBER 13 2026.......SUNRISE 7:17 AM EDT SUNSET 6:34 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-112123:IAD:2026-10-11:interim · iem-afos · IEM archive
SHA-256 b71fd6740f5f15e0d9e0fb325ac93e06c29e269ca0c33efc8f4dcc2e1c40795c
Product text
CDUS41 KLWX 112123
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
523 PM EDT SUN OCT 11 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 11 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 63 2:26 PM 86 2010 70 -7 73
MINIMUM 60 3:59 PM 28 1972 47 13 43
AVERAGE 62 58 4 58
PRECIPITATION (IN)
TODAY 1.82 3.38 2013 0.12 1.70 T
MONTH TO DATE 2.22 1.36 0.86 0.16
SINCE SEP 1 6.02 5.30 0.72 1.38
SINCE JAN 1 35.42 34.52 0.90 26.02
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 8 -5 7
MONTH TO DATE 34 66 -32 45
SINCE SEP 1 55 111 -56 52
SINCE JUL 1 55 112 -57 54
COOLING
TODAY 0 1 -1 0
MONTH TO DATE 19 16 3 12
SINCE SEP 1 243 168 75 182
SINCE JAN 1 1523 1224 299 1330
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION NE (30)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION E (70)
AVERAGE WIND SPEED 9.7
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
HEAVY RAIN
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 2:00 PM
LOWEST 80 12:00 AM
AVERAGE 89
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 83 1995
2010
MINIMUM TEMPERATURE (F) 47 25 1964
SUNRISE AND SUNSET
OCTOBER 11 2026.......SUNRISE 7:15 AM EDT SUNSET 6:37 PM EDT
OCTOBER 12 2026.......SUNRISE 7:16 AM EDT SUNSET 6:36 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/2026-10-11 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.