{"station":{"icao":"KBOS","cliId":"BOS","pil":"CLIBOS","city":{"slug":"boston","name":"보스턴","country":"United States"},"timezone":"America/New_York","feed":"https://api.weather.gov/products/types/CLI/locations/BOS","html":"https://weathermarket.io/nws-cli/KBOS","json":"https://weathermarket.io/api/nws-cli/KBOS"},"stationToday":"2026-11-14","day":{"date":"2026-09-20","status":"issued","note":"Final CLI issued - values.nwsOfficial carries the official daily values (metric here; official.issued.asReported keeps the °F / inch / mph exactly as printed).","settlement":{"tmaxF":63,"tminF":55,"precipIn":0.1,"precipTrace":false,"tmax":17.22,"tmin":12.78,"precip":2.54,"issuedAt":"2026-09-21T05:26:00.000Z","productId":"iem:CDUS41-KBOX-210526:BOS:2026-09-20:final","corrected":false,"reissues":0,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLIBOS&e=202609210526"},"issues":[{"kind":"interim","asOfLocal":"0500 PM","issuedAt":"2026-09-20T21:22:00.000Z","issuedLocal":"522 PM EDT SUN SEP 20 2026","office":"KBOX","wmoHeader":"CDUS41 KBOX 202122","productId":"iem:CDUS41-KBOX-202122:BOS:2026-09-20:interim","source":"iem-afos","corrected":false,"tmaxF":63,"tmaxTimeLocal":"348 PM","tminF":55,"tminTimeLocal":"217 AM","precipIn":0,"precipTrace":true,"snowIn":0,"snowTrace":false,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLIBOS&e=202609202122","parseProblems":[],"rawTextSha256":"a105a6946df9f49fe9c5857988ebe2e861608002b2801a353061e5f99eb2d3c7","rawText":"CDUS41 KBOX 202122\nCLIBOS\n\nCLIMATE REPORT \nNATIONAL WEATHER SERVICE BOSTON/NORTON MA\n522 PM EDT SUN SEP 20 2026\n\n...................................\n\n...THE BOSTON MA CLIMATE SUMMARY FOR SEPTEMBER 20 2026...\nVALID TODAY AS OF 0500 PM LOCAL TIME.\n\nCLIMATE NORMAL PERIOD 1991 TO 2020\nCLIMATE RECORD PERIOD 1872 TO 2026\n\n\nWEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST \n VALUE (LST) VALUE VALUE FROM YEAR \n NORMAL \n...................................................................\nTEMPERATURE (F) \n TODAY \n MAXIMUM 63 348 PM 97 1983 72 -9 65 \n MINIMUM 55 217 AM 42 1929 57 -2 54 \n 1964 \n 1979 \n AVERAGE 59 64 -5 60 \n\nPRECIPITATION (IN) \n TODAY T 2.82 1899 0.13 -0.13 0.00 \n MONTH TO DATE 1.70 2.28 -0.58 1.55 \n SINCE SEP 1 1.70 2.28 -0.58 1.55 \n SINCE JAN 1 19.26 30.32 -11.06 26.50 \n\nSNOWFALL (IN) \n TODAY 0.0 0.0 2000 0.0 0.0 0.0 \n 2001 \n 2002 \n MONTH TO DATE 0.0 0.0 0.0 0.0 \n SINCE SEP 1 0.0 0.0 0.0 0.0 \n SINCE JUL 1 0.0 0.0 0.0 0.0 \n\nDEGREE DAYS \n HEATING \n TODAY 6 3 3 5 \n MONTH TO DATE 20 28 -8 23 \n SINCE SEP 1 20 28 -8 23 \n SINCE JUL 1 20 37 -17 30 \n\n COOLING \n TODAY 0 2 -2 0 \n MONTH TO DATE 77 76 1 45 \n SINCE SEP 1 77 76 1 45 \n SINCE JAN 1 994 776 218 802 \n...................................................................\n\n\nWIND (MPH) \n HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION SE (150) \n HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION SE (140) \n AVERAGE WIND SPEED 8.1 \n\n\nSKY COVER \n POSSIBLE SUNSHINE MM \n AVERAGE SKY COVER 0.9 \n\n\nWEATHER CONDITIONS \nTHE FOLLOWING WEATHER WAS RECORDED TODAY. \n LIGHT RAIN \n\n\nRELATIVE HUMIDITY (PERCENT)\n HIGHEST 78 300 PM \n LOWEST 64 200 AM \n AVERAGE 71 \n\n..........................................................\n\n\nTHE BOSTON MA CLIMATE NORMALS FOR TOMORROW\n NORMAL RECORD YEAR \n MAXIMUM TEMPERATURE (F) 71 94 1895 \n MINIMUM TEMPERATURE (F) 56 40 1904 \n 1929 \n\n\nSUNRISE AND SUNSET \nSEPTEMBER 20 2026.....SUNRISE 629 AM EDT SUNSET 645 PM EDT \nSEPTEMBER 21 2026.....SUNRISE 630 AM EDT SUNSET 643 PM EDT \n\n\n- INDICATES NEGATIVE NUMBERS.\nR INDICATES RECORD WAS SET OR TIED.\nMM INDICATES DATA IS MISSING.\nT INDICATES TRACE AMOUNT.\n\n\n\n\n$$"},{"kind":"final","asOfLocal":null,"issuedAt":"2026-09-21T05:26:00.000Z","issuedLocal":"126 AM EDT MON SEP 21 2026","office":"KBOX","wmoHeader":"CDUS41 KBOX 210526","productId":"iem:CDUS41-KBOX-210526:BOS:2026-09-20:final","source":"iem-afos","corrected":false,"tmaxF":63,"tmaxTimeLocal":"348 PM","tminF":55,"tminTimeLocal":"217 AM","precipIn":0.1,"precipTrace":false,"snowIn":0,"snowTrace":false,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLIBOS&e=202609210526","parseProblems":[],"rawTextSha256":"f4a746d0d952ab82bc5b366344dead75e19d2e109406932c395c6f2618e77fe8","rawText":"CDUS41 KBOX 210526\nCLIBOS\n\nCLIMATE REPORT \nNATIONAL WEATHER SERVICE BOSTON/NORTON MA\n126 AM EDT MON SEP 21 2026\n\n...................................\n\n...THE BOSTON MA CLIMATE SUMMARY FOR SEPTEMBER 20 2026...\n\nCLIMATE NORMAL PERIOD 1991 TO 2020\nCLIMATE RECORD PERIOD 1872 TO 2026\n\n\nWEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST \n VALUE (LST) VALUE VALUE FROM YEAR \n NORMAL \n...................................................................\nTEMPERATURE (F) \n YESTERDAY \n MAXIMUM 63 348 PM 97 1983 72 -9 65 \n MINIMUM 55 217 AM 42 1929 57 -2 54 \n 1964 \n 1979 \n AVERAGE 59 64 -5 60 \n\nPRECIPITATION (IN) \n YESTERDAY 0.10 2.82 1899 0.13 -0.03 0.00 \n MONTH TO DATE 1.80 2.28 -0.48 1.55 \n SINCE SEP 1 1.80 2.28 -0.48 1.55 \n SINCE JAN 1 19.36 30.32 -10.96 26.50 \n\nSNOWFALL (IN) \n YESTERDAY 0.0 0.0 2000 0.0 0.0 0.0 \n 2001 \n 2002 \n MONTH TO DATE 0.0 0.0 0.0 0.0 \n SINCE SEP 1 0.0 0.0 0.0 0.0 \n SINCE JUL 1 0.0 0.0 0.0 0.0 \n\nDEGREE DAYS \n HEATING \n YESTERDAY 6 3 3 5 \n MONTH TO DATE 20 28 -8 23 \n SINCE SEP 1 20 28 -8 23 \n SINCE JUL 1 20 37 -17 30 \n\n COOLING \n YESTERDAY 0 2 -2 0 \n MONTH TO DATE 77 76 1 45 \n SINCE SEP 1 77 76 1 45 \n SINCE JAN 1 994 776 218 802 \n...................................................................\n\n\nWIND (MPH) \n RESULTANT WIND SPEED 7 RESULTANT WIND DIRECTION SE (140) \n HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION SE (140) \n HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION SE (140) \n AVERAGE WIND SPEED 7.7 \n\n\nSKY COVER \n POSSIBLE SUNSHINE MM \n AVERAGE SKY COVER 1.0 \n\n\nWEATHER CONDITIONS \nTHE FOLLOWING WEATHER WAS RECORDED YESTERDAY. \n LIGHT RAIN \n FOG \n\n\nRELATIVE HUMIDITY (PERCENT)\n HIGHEST 100 1100 PM \n LOWEST 64 200 AM \n AVERAGE 82 \n\n..........................................................\n\n\nTHE BOSTON MA CLIMATE NORMALS FOR TODAY\n NORMAL RECORD YEAR \n MAXIMUM TEMPERATURE (F) 71 94 1895 \n MINIMUM TEMPERATURE (F) 56 40 1904 \n 1929 \n\n\nSUNRISE AND SUNSET \nSEPTEMBER 21 2026.....SUNRISE 630 AM EDT SUNSET 643 PM EDT \nSEPTEMBER 22 2026.....SUNRISE 631 AM EDT SUNSET 641 PM EDT \n\n\n- INDICATES NEGATIVE NUMBERS.\nR INDICATES RECORD WAS SET OR TIED.\nMM INDICATES DATA IS MISSING.\nT INDICATES TRACE AMOUNT.\n\n\n\n\n$$"}],"html":"https://weathermarket.io/nws-cli/KBOS/2026-09-20","json":"https://weathermarket.io/api/nws-cli/KBOS/2026-09-20"},"about":{"product":"NWS Climatological Report (CLI): the daily climate summary issued by the local NWS forecast office from the station's 1-minute ASOS record, normally 1-3 hours after local midnight (final, 'YESTERDAY') and once during the day (interim, 'TODAY AS OF'). Corrections are re-issued under the same PIL with CORRECTED in the text.","settlementRule":"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.","archive":"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.","verify":["Each issue carries the NWS product id (api.weather.gov keeps products for a limited time) and a link to the IEM AFOS permanent archive of the same product.","rawTextSha256 is the SHA-256 of the stored product text; compare it with the text at either link to confirm nothing was altered.","Permalink pattern for market rules: https://weathermarket.io/nws-cli/KBOS/YYYY-MM-DD (HTML) and https://weathermarket.io/api/nws-cli/KBOS/YYYY-MM-DD (JSON)."],"citation":"Settlement source: the final NWS Climatological Report (CLI) for station KBOS for the contract date, as archived verbatim at https://weathermarket.io/nws-cli/KBOS/YYYY-MM-DD with links to the NWS product and the IEM archive. A CORRECTED re-issue published before the settlement time supersedes earlier issues."}}