NWS CLI archive · settlement source
CLIIAD · 워싱턴 D.C. · America/New_York · ← 2026-10-21 · 2026-10-23 → · All dates for KIAD · JSON · METAR-derived record
Final issued 2026-10-23 02:25:00 EDT · Product id iem:CDUS41-KLWX-230625:IAD:2026-10-22:final · IEM archive
Product id iem:CDUS41-KLWX-230625:IAD:2026-10-22:final · iem-afos · IEM archive
SHA-256 03d021f6aebe38ec1d0ffb40c3cec504165d01a19a3b1d2445feba0a4deaca99
Product text
CDUS41 KLWX 230625
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
225 AM EDT FRI OCT 23 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 22 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 3:35 PM 85 1979 66 2 68
MINIMUM 36 6:28 AM 26 1974 43 -7 45
AVERAGE 52 54 -2 57
PRECIPITATION (IN)
YESTERDAY 0.00 0.90 1985 0.12 -0.12 0.02
MONTH TO DATE 3.61 2.64 0.97 0.97
SINCE SEP 1 7.41 6.58 0.83 2.19
SINCE JAN 1 36.81 35.80 1.01 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 13 11 2 8
MONTH TO DATE 105 169 -64 120
SINCE SEP 1 126 214 -88 127
SINCE JUL 1 126 215 -89 129
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 16 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION NW (330)
AVERAGE WIND SPEED 5.7
SKY COVER
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 4:00 AM
LOWEST 22 4:00 PM
AVERAGE 60
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 65 85 1978
MINIMUM TEMPERATURE (F) 43 21 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.
$$Product id iem:CDUS41-KLWX-222124:IAD:2026-10-22:interim · iem-afos · IEM archive
SHA-256 d533c08165642f74c959a46db192104b64e53c008c4435132221d0293abfc514
Product text
CDUS41 KLWX 222124
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
524 PM EDT THU OCT 22 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 22 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 3:35 PM 85 1979 66 2 68
MINIMUM 36 6:28 AM 26 1974 43 -7 45
AVERAGE 52 54 -2 57
PRECIPITATION (IN)
TODAY 0.00 0.90 1985 0.12 -0.12 0.02
MONTH TO DATE 3.61 2.64 0.97 0.97
SINCE SEP 1 7.41 6.58 0.83 2.19
SINCE JAN 1 36.81 35.80 1.01 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 13 11 2 8
MONTH TO DATE 105 169 -64 120
SINCE SEP 1 126 214 -88 127
SINCE JUL 1 126 215 -89 129
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 16 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION NW (330)
AVERAGE WIND SPEED 5.6
SKY COVER
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 4:00 AM
LOWEST 22 4:00 PM
AVERAGE 60
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 65 85 1978
MINIMUM TEMPERATURE (F) 43 21 1969
SUNRISE AND SUNSET
OCTOBER 22 2026.......SUNRISE 7:26 AM EDT SUNSET 6:21 PM EDT
OCTOBER 23 2026.......SUNRISE 7:28 AM EDT SUNSET 6:20 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/2026-10-22 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.