NWS CLI archive · settlement source
CLIIAD · 워싱턴 D.C. · America/New_York · ← 2026-10-07 · 2026-10-09 → · All dates for KIAD · JSON · METAR-derived record
Final issued 2026-10-09 02:20:00 EDT · Product id iem:CDUS41-KLWX-090620:IAD:2026-10-08:final · IEM archive
Product id iem:CDUS41-KLWX-090620:IAD:2026-10-08:final · iem-afos · IEM archive
SHA-256 ec195c74d6a46dc448f11249284fe6a37f09782c0fe047c644ced315e236faf9
Product text
CDUS41 KLWX 090620
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
220 AM EDT FRI OCT 09 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 8 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 79 3:49 PM 92 2007 71 8 73
MINIMUM 51 11:59 PM 30 2001 48 3 56
AVERAGE 65 60 5 65
PRECIPITATION (IN)
YESTERDAY 0.00 2.79 2005 0.13 -0.13 0.14
MONTH TO DATE 0.40 1.01 -0.61 0.16
SINCE SEP 1 4.20 4.95 -0.75 1.38
SINCE JAN 1 33.60 34.17 -0.57 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 0 7 -7 0
MONTH TO DATE 22 44 -22 17
SINCE SEP 1 43 89 -46 24
SINCE JUL 1 43 90 -47 26
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 19 13 6 12
SINCE SEP 1 243 165 78 182
SINCE JAN 1 1523 1221 302 1330
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION W (290)
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION NW (300)
AVERAGE WIND SPEED 6.5
SKY COVER
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 5:00 AM
LOWEST 27 4:00 PM
AVERAGE 60
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 70 94 2007
MINIMUM TEMPERATURE (F) 48 26 2001
SUNRISE AND SUNSET
OCTOBER 9 2026.......SUNRISE 7:13 AM EDT SUNSET 6:40 PM EDT
OCTOBER 10 2026.......SUNRISE 7:14 AM EDT SUNSET 6:38 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-082122:IAD:2026-10-08:interim · iem-afos · IEM archive
SHA-256 0ad399376b3c858a3b8f2365cb7999604294a5607b17fecb0e9f94a7869f7971
Product text
CDUS41 KLWX 082122
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
522 PM EDT THU OCT 08 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 8 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 79 3:49 PM 92 2007 71 8 73
MINIMUM 52 6:21 AM 30 2001 48 4 56
AVERAGE 66 60 6 65
PRECIPITATION (IN)
TODAY 0.00 2.79 2005 0.13 -0.13 0.14
MONTH TO DATE 0.40 1.01 -0.61 0.16
SINCE SEP 1 4.20 4.95 -0.75 1.38
SINCE JAN 1 33.60 34.17 -0.57 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 0 7 -7 0
MONTH TO DATE 22 44 -22 17
SINCE SEP 1 43 89 -46 24
SINCE JUL 1 43 90 -47 26
COOLING
TODAY 1 1 0 0
MONTH TO DATE 20 13 7 12
SINCE SEP 1 244 165 79 182
SINCE JAN 1 1524 1221 303 1330
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION W (290)
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION NW (300)
AVERAGE WIND SPEED 7.9
SKY COVER
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 5:00 AM
LOWEST 27 4:00 PM
AVERAGE 60
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 70 94 2007
MINIMUM TEMPERATURE (F) 48 26 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.
$$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/2026-10-08 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.