NWS CLI archive · settlement source
CLIIAD · 워싱턴 D.C. · America/New_York · ← 2026-10-02 · 2026-10-04 → · All dates for KIAD · JSON · METAR-derived record
Final issued 2026-10-04 02:32:00 EDT · Product id iem:CDUS41-KLWX-040632:IAD:2026-10-03:final · IEM archive
Product id iem:CDUS41-KLWX-040632:IAD:2026-10-03:final · iem-afos · IEM archive
SHA-256 14f36f698bb2c6be982a1018d48b712f2ca171a74ac93861a9700dc63cf205e4
Product text
CDUS41 KLWX 040632
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
232 AM EDT SUN OCT 04 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 3 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 68 2:03 AM 86 2002 73 -5 74
2007
2018
MINIMUM 57 9:34 AM 30 1974 51 6 45
2003
AVERAGE 63 62 1 60
PRECIPITATION (IN)
YESTERDAY 0.09 0.86 1987 0.12 -0.03 0.00
MONTH TO DATE 0.33 0.38 -0.05 0.00
SINCE SEP 1 4.13 4.32 -0.19 1.22
SINCE JAN 1 33.53 33.54 -0.01 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 0
DEGREE DAYS
HEATING
YESTERDAY 2 5 -3 5
MONTH TO DATE 2 14 -12 14
SINCE SEP 1 23 59 -36 21
SINCE JUL 1 23 60 -37 23
COOLING
YESTERDAY 0 2 -2 0
MONTH TO DATE 19 6 13 0
SINCE SEP 1 217 158 59 170
SINCE JAN 1 1497 1214 283 1318
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION N (20)
AVERAGE WIND SPEED 4.6
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 11:00 PM
LOWEST 60 2:00 PM
AVERAGE 75
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 72 90 2013
MINIMUM TEMPERATURE (F) 50 26 1974
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.
$$Product id iem:CDUS41-KLWX-032131:IAD:2026-10-03:interim · iem-afos · IEM archive
SHA-256 b596575c09d28999346656e925c3c31c4aa3fd4f817f8fe8305dcb227331de56
Product text
CDUS41 KLWX 032131
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
531 PM EDT SAT OCT 03 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 3 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 68 2:03 AM 86 2002 73 -5 74
2007
2018
MINIMUM 57 9:34 AM 30 1974 51 6 45
2003
AVERAGE 63 62 1 60
PRECIPITATION (IN)
TODAY 0.09 0.86 1987 0.12 -0.03 0.00
MONTH TO DATE 0.33 0.38 -0.05 0.00
SINCE SEP 1 4.13 4.32 -0.19 1.22
SINCE JAN 1 33.53 33.54 -0.01 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 2 5 -3 5
MONTH TO DATE 2 14 -12 14
SINCE SEP 1 23 59 -36 21
SINCE JUL 1 23 60 -37 23
COOLING
TODAY 0 2 -2 0
MONTH TO DATE 19 6 13 0
SINCE SEP 1 217 158 59 170
SINCE JAN 1 1497 1214 283 1318
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION N (20)
AVERAGE WIND SPEED 7.0
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 84 12:00 AM
LOWEST 60 2:00 PM
AVERAGE 72
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 72 90 2013
MINIMUM TEMPERATURE (F) 50 26 1974
SUNRISE AND SUNSET
OCTOBER 3 2026.......SUNRISE 7:08 AM EDT SUNSET 6:49 PM EDT
OCTOBER 4 2026.......SUNRISE 7:09 AM EDT SUNSET 6:48 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/2026-10-03 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.