NWS CLI archive · settlement source
CLIIAD · 워싱턴 D.C. · America/New_York · ← 2026-10-22 · 2026-10-24 → · All dates for KIAD · JSON · METAR-derived record
Final issued 2026-10-24 02:22:00 EDT · Product id iem:CDUS41-KLWX-240622:IAD:2026-10-23:final · IEM archive
Product id iem:CDUS41-KLWX-240622:IAD:2026-10-23:final · iem-afos · IEM archive
SHA-256 7e4ed76314d481747000b38fa789c94db16b04e2d77c3b5712956baa59cbf9e2
Product text
CDUS41 KLWX 240622
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
222 AM EDT SAT OCT 24 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 23 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 64 3:28 PM 85 1978 65 -1 63
MINIMUM 41 11:59 PM 21 1969 43 -2 37
AVERAGE 53 54 -1 50
PRECIPITATION (IN)
YESTERDAY 0.00 2.63 1990 0.12 -0.12 0.00
MONTH TO DATE 3.61 2.76 0.85 0.97
SINCE SEP 1 7.41 6.70 0.71 2.19
SINCE JAN 1 36.81 35.92 0.89 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 11 1 15
MONTH TO DATE 117 180 -63 135
SINCE SEP 1 138 225 -87 142
SINCE JUL 1 138 226 -88 144
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 13 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION N (20)
AVERAGE WIND SPEED 4.6
SKY COVER
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 86 11:00 PM
LOWEST 41 2:00 PM
AVERAGE 64
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 65 84 2001
MINIMUM TEMPERATURE (F) 42 15 1969
SUNRISE AND SUNSET
OCTOBER 24 2026.......SUNRISE 7:29 AM EDT SUNSET 6:19 PM EDT
OCTOBER 25 2026.......SUNRISE 7:30 AM EDT SUNSET 6:18 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-232124:IAD:2026-10-23:interim · iem-afos · IEM archive
SHA-256 7438d6d28721f4ca438b8c35285cedaacb58192258d31932bca3142e912cb087
Product text
CDUS41 KLWX 232124
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
524 PM EDT FRI OCT 23 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 23 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 64 3:28 PM 85 1978 65 -1 63
MINIMUM 41 2:54 AM 21 1969 43 -2 37
AVERAGE 53 54 -1 50
PRECIPITATION (IN)
TODAY 0.00 2.63 1990 0.12 -0.12 0.00
MONTH TO DATE 3.61 2.76 0.85 0.97
SINCE SEP 1 7.41 6.70 0.71 2.19
SINCE JAN 1 36.81 35.92 0.89 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 11 1 15
MONTH TO DATE 117 180 -63 135
SINCE SEP 1 138 225 -87 142
SINCE JUL 1 138 226 -88 144
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 13 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION N (20)
AVERAGE WIND SPEED 5.4
SKY COVER
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 86 3:00 AM
LOWEST 41 2:00 PM
AVERAGE 64
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 65 84 2001
MINIMUM TEMPERATURE (F) 42 15 1969
SUNRISE AND SUNSET
OCTOBER 23 2026.......SUNRISE 7:28 AM EDT SUNSET 6:20 PM EDT
OCTOBER 24 2026.......SUNRISE 7:29 AM EDT SUNSET 6:19 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/2026-10-23 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.