NWS CLI archive · settlement source
CLIIAD · 워싱턴 D.C. · America/New_York · ← 2026-10-11 · 2026-10-13 → · All dates for KIAD · JSON · METAR-derived record
Final issued 2026-10-13 02:24:00 EDT · Product id iem:CDUS41-KLWX-130624:IAD:2026-10-12:final · IEM archive
Product id iem:CDUS41-KLWX-130624:IAD:2026-10-12:final · iem-afos · IEM archive
SHA-256 fd9f6a7ba98b107ae79889015b1948ee94da888a053c5851cb4fef3fce4caa12
Product text
CDUS41 KLWX 130624
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
224 AM EDT TUE OCT 13 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 12 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 76 3:13 PM 83 1995 69 7 67
2010
MINIMUM 57 11:59 PM 25 1964 47 10 57
AVERAGE 67 58 9 62
PRECIPITATION (IN)
YESTERDAY 0.96R 0.78 1990 0.11 0.85 0.13
MONTH TO DATE 3.27 1.47 1.80 0.29
SINCE SEP 1 7.07 5.41 1.66 1.51
SINCE JAN 1 36.47 34.63 1.84 26.15
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 3
MONTH TO DATE 34 74 -40 48
SINCE SEP 1 55 119 -64 55
SINCE JUL 1 55 120 -65 57
COOLING
YESTERDAY 2 1 1 0
MONTH TO DATE 21 17 4 12
SINCE SEP 1 245 169 76 182
SINCE JAN 1 1525 1225 300 1330
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 31 HIGHEST GUST DIRECTION N (350)
AVERAGE WIND SPEED 9.5
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 12:00 AM
LOWEST 57 4:00 PM
AVERAGE 77
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 84 1989
MINIMUM TEMPERATURE (F) 46 30 1987
1988
2012
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.
$$Product id iem:CDUS41-KLWX-122122:IAD:2026-10-12:interim · iem-afos · IEM archive
SHA-256 7563aa28e126532782ec8060a7a545cb6d77ea003a7d13f5e36dd16a66b256b1
Product text
CDUS41 KLWX 122122
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
522 PM EDT MON OCT 12 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 12 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 76 3:13 PM 83 1995 69 7 67
2010
MINIMUM 59 2:33 AM 25 1964 47 12 57
AVERAGE 68 58 10 62
PRECIPITATION (IN)
TODAY 0.96R 0.78 1990 0.11 0.85 0.13
MONTH TO DATE 3.27 1.47 1.80 0.29
SINCE SEP 1 7.07 5.41 1.66 1.51
SINCE JAN 1 36.47 34.63 1.84 26.15
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 3
MONTH TO DATE 34 74 -40 48
SINCE SEP 1 55 119 -64 55
SINCE JUL 1 55 120 -65 57
COOLING
TODAY 3 1 2 0
MONTH TO DATE 22 17 5 12
SINCE SEP 1 246 169 77 182
SINCE JAN 1 1526 1225 301 1330
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 31 HIGHEST GUST DIRECTION N (350)
AVERAGE WIND SPEED 12.3
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 12:00 AM
LOWEST 57 4:00 PM
AVERAGE 77
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 84 1989
MINIMUM TEMPERATURE (F) 46 30 1987
1988
2012
SUNRISE AND SUNSET
OCTOBER 12 2026.......SUNRISE 7:16 AM EDT SUNSET 6:36 PM EDT
OCTOBER 13 2026.......SUNRISE 7:17 AM EDT SUNSET 6:34 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/2026-10-12 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.