NWS CLI archive · settlement source
CLIIAD · 워싱턴 D.C. · America/New_York · ← 2026-10-30 · 2026-11-01 → · All dates for KIAD · JSON · METAR-derived record
Final issued 2026-11-01 02:22:00 EST · Product id iem:CDUS41-KLWX-010722:IAD:2026-10-31:final · +1 · IEM archive
Product id iem:CDUS41-KLWX-010722:IAD:2026-10-31:final · iem-afos · IEM archive
SHA-256 5899d0f02f6d1154c0cbca1ac87069817b2f074d503c6f14da60ed8765c30314
Product text
CDUS41 KLWX 010722
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
222 AM EST SUN NOV 01 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 31 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 62 2:28 PM 83 2024 62 0 61
MINIMUM 39 6:38 AM 21 1968 40 -1 48
AVERAGE 51 51 0 55
PRECIPITATION (IN)
YESTERDAY 0.00 1.35 2019 0.11 -0.11 0.00
MONTH TO DATE 3.61 3.65 -0.04 2.13
SINCE SEP 1 7.41 7.59 -0.18 3.35
SINCE JAN 1 36.81 36.81 0.00 27.99
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 14 14 0 10
MONTH TO DATE 189 283 -94 251
SINCE SEP 1 210 328 -118 258
SINCE JUL 1 210 329 -119 260
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 44 22 22 12
SINCE SEP 1 268 174 94 182
SINCE JAN 1 1548 1230 318 1330
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION N (360)
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION N (350)
AVERAGE WIND SPEED 2.0
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 89 6:00 AM
LOWEST 41 3:00 PM
AVERAGE 65
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 62 84 1982
MINIMUM TEMPERATURE (F) 40 25 1975
SUNRISE AND SUNSET
NOVEMBER 1 2026......SUNRISE 6:37 AM EST SUNSET 5:09 PM EST
NOVEMBER 2 2026......SUNRISE 6:38 AM EST SUNSET 5:08 PM EST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$Product id iem:CDUS41-KLWX-010655:IAD:2026-10-31:final · iem-afos · IEM archive
SHA-256 f71876969e4032c256cf3908106869a95099e5c51095230d72600d1330e84909
Product text
CDUS41 KLWX 010655
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
155 AM EST SUN NOV 01 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 31 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 62 2:28 PM 83 2024 62 0 61
MINIMUM 39 6:38 AM 21 1968 40 -1 48
AVERAGE 51 51 0 55
PRECIPITATION (IN)
YESTERDAY 0.00 1.35 2019 0.11 -0.11 0.00
MONTH TO DATE 3.61 3.65 -0.04 2.13
SINCE SEP 1 7.41 7.59 -0.18 3.35
SINCE JAN 1 36.81 36.81 0.00 27.99
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 14 14 0 10
MONTH TO DATE 189 283 -94 251
SINCE SEP 1 210 328 -118 258
SINCE JUL 1 210 329 -119 260
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 44 22 22 12
SINCE SEP 1 268 174 94 182
SINCE JAN 1 1548 1230 318 1330
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION N (360)
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION N (350)
AVERAGE WIND SPEED 2.0
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 89 6:00 AM
LOWEST 41 3:00 PM
AVERAGE 65
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 62 84 1982
MINIMUM TEMPERATURE (F) 40 25 1975
SUNRISE AND SUNSET
NOVEMBER 1 2026......SUNRISE 6:37 AM EST SUNSET 5:09 PM EST
NOVEMBER 2 2026......SUNRISE 6:38 AM EST SUNSET 5:08 PM EST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$Product id iem:CDUS41-KLWX-312121:IAD:2026-10-31:interim · iem-afos · IEM archive
SHA-256 a1540b1fcf1bc021d865c96bec985b5b638f57f931a711deffcba42c7c5ea08a
Product text
CDUS41 KLWX 312121
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
521 PM EDT SAT OCT 31 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 31 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 62 2:28 PM 83 2024 62 0 61
MINIMUM 39 6:38 AM 21 1968 40 -1 48
AVERAGE 51 51 0 55
PRECIPITATION (IN)
TODAY 0.00 1.35 2019 0.11 -0.11 0.00
MONTH TO DATE 3.61 3.65 -0.04 2.13
SINCE SEP 1 7.41 7.59 -0.18 3.35
SINCE JAN 1 36.81 36.81 0.00 27.99
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 14 14 0 10
MONTH TO DATE 189 283 -94 251
SINCE SEP 1 210 328 -118 258
SINCE JUL 1 210 329 -119 260
COOLING
TODAY 0 0 0 0
MONTH TO DATE 44 22 22 12
SINCE SEP 1 268 174 94 182
SINCE JAN 1 1548 1230 318 1330
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION N (360)
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION N (350)
AVERAGE WIND SPEED 3.2
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 89 6:00 AM
LOWEST 41 3:00 PM
AVERAGE 65
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 62 84 1982
MINIMUM TEMPERATURE (F) 40 25 1975
SUNRISE AND SUNSET
OCTOBER 31 2026.......SUNRISE 7:36 AM EDT SUNSET 6:10 PM EDT
NOVEMBER 1 2026......SUNRISE 6:37 AM EST SUNSET 5:09 PM EST
- 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/2026-10-31 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.