NWS CLI archive · settlement source
CLIIAD · 워싱턴 D.C. · America/New_York · ← 2026-10-12 · 2026-10-14 → · All dates for KIAD · JSON · METAR-derived record
Final issued 2026-10-14 02:27:00 EDT · Product id iem:CDUS41-KLWX-140627:IAD:2026-10-13:final · IEM archive
Product id iem:CDUS41-KLWX-140627:IAD:2026-10-13:final · iem-afos · IEM archive
SHA-256 6186a0143b410000c1bac89409e6735de46a0c6aed5a7e2dec4e29dcb13439c8
Product text
CDUS41 KLWX 140627
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
227 AM EDT WED OCT 14 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 13 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 84R MM 84 1989 69 15 64
MINIMUM 52 MM 30 1987 46 6 56
1988
2012
AVERAGE 68 58 10 60
PRECIPITATION (IN)
YESTERDAY 0.00 1.92 2011 0.11 -0.11 0.05
MONTH TO DATE 3.27 1.58 1.69 0.34
SINCE SEP 1 7.07 5.52 1.55 1.56
SINCE JAN 1 36.47 34.74 1.73 26.20
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 8 -8 5
MONTH TO DATE 34 82 -48 53
SINCE SEP 1 55 127 -72 60
SINCE JUL 1 55 128 -73 62
COOLING
YESTERDAY 3 1 2 0
MONTH TO DATE 24 18 6 12
SINCE SEP 1 248 170 78 182
SINCE JAN 1 1528 1226 302 1330
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 5.8
SKY COVER
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 2:00 AM
LOWEST 44 3:00 PM
AVERAGE 72
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 86 1975
MINIMUM TEMPERATURE (F) 46 23 1988
SUNRISE AND SUNSET
OCTOBER 14 2026.......SUNRISE 7:18 AM EDT SUNSET 6:33 PM EDT
OCTOBER 15 2026.......SUNRISE 7:19 AM EDT SUNSET 6:31 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-132124:IAD:2026-10-13:interim · iem-afos · IEM archive
SHA-256 c31305f668d1050c282912329fe8adde9f3de67c77487f5c4da38509fa934b3c
Product text
CDUS41 KLWX 132124
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
524 PM EDT TUE OCT 13 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 13 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 84R 2:42 PM 84 1989 69 15 64
MINIMUM 52 6:45 AM 30 1987 46 6 56
1988
2012
AVERAGE 68 58 10 60
PRECIPITATION (IN)
TODAY 0.00 1.92 2011 0.11 -0.11 0.05
MONTH TO DATE 3.27 1.58 1.69 0.34
SINCE SEP 1 7.07 5.52 1.55 1.56
SINCE JAN 1 36.47 34.74 1.73 26.20
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 8 -8 5
MONTH TO DATE 34 82 -48 53
SINCE SEP 1 55 127 -72 60
SINCE JUL 1 55 128 -73 62
COOLING
TODAY 3 1 2 0
MONTH TO DATE 24 18 6 12
SINCE SEP 1 248 170 78 182
SINCE JAN 1 1528 1226 302 1330
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION S (190)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 5.1
SKY COVER
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 2:00 AM
LOWEST 44 3:00 PM
AVERAGE 72
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 86 1975
MINIMUM TEMPERATURE (F) 46 23 1988
SUNRISE AND SUNSET
OCTOBER 13 2026.......SUNRISE 7:17 AM EDT SUNSET 6:34 PM EDT
OCTOBER 14 2026.......SUNRISE 7:18 AM EDT SUNSET 6:33 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/2026-10-13 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.