NWS CLI archive · settlement source
CLIBOS · 보스턴 · America/New_York · ← 2026-09-10 · 2026-09-12 → · All dates for KBOS · JSON · METAR-derived record
Final issued 2026-09-12 01:32:00 EDT · Product id iem:CDUS41-KBOX-120532:BOS:2026-09-11:final · IEM archive
Product id iem:CDUS41-KBOX-120532:BOS:2026-09-11:final · iem-afos · IEM archive
SHA-256 ecb0b5ebd8fc0e227b2fe0896e2ce06fd05877a3453c07f8e688438ce3afa9e2
Product text
CDUS41 KBOX 120532
CLIBOS
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
132 AM EDT SAT SEP 12 2026
...................................
...THE BOSTON MA CLIMATE SUMMARY FOR SEPTEMBER 11 2026...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1872 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 79 327 PM 99 1983 75 4 74
MINIMUM 63 1154 PM 40 1917 60 3 55
AVERAGE 71 67 4 65
PRECIPITATION (IN)
YESTERDAY 0.00 5.63 1954 0.11 -0.11 0.00
MONTH TO DATE 0.86 1.17 -0.31 1.43
SINCE SEP 1 0.86 1.17 -0.31 1.43
SINCE JAN 1 18.42 29.21 -10.79 26.38
SNOWFALL (IN)
YESTERDAY 0.0 0.0 2000 0.0 0.0 0.0
2001
2002
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
DEGREE DAYS
HEATING
YESTERDAY 0 1 -1 0
MONTH TO DATE 1 9 -8 10
SINCE SEP 1 1 9 -8 10
SINCE JUL 1 1 18 -17 17
COOLING
YESTERDAY 6 4 2 0
MONTH TO DATE 60 52 8 32
SINCE SEP 1 60 52 8 32
SINCE JAN 1 977 752 225 789
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 9 RESULTANT WIND DIRECTION NW (310)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION NW (320)
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION W (280)
AVERAGE WIND SPEED 9.2
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 59 400 AM
LOWEST 30 300 PM
AVERAGE 45
..........................................................
THE BOSTON MA CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 93 1961
MINIMUM TEMPERATURE (F) 60 43 1875
SUNRISE AND SUNSET
SEPTEMBER 12 2026.....SUNRISE 621 AM EDT SUNSET 659 PM EDT
SEPTEMBER 13 2026.....SUNRISE 622 AM EDT SUNSET 657 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-KBOX-112125:BOS:2026-09-11:interim · iem-afos · IEM archive
SHA-256 eb65bab39bc05a727a64e33bd2e51b66ae701ac45c7441eb82728c9d2fcbc789
Product text
CDUS41 KBOX 112125
CLIBOS
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
525 PM EDT FRI SEP 11 2026
...................................
...THE BOSTON MA CLIMATE SUMMARY FOR SEPTEMBER 11 2026...
VALID TODAY AS OF 0500 PM LOCAL TIME.
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1872 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
TODAY
MAXIMUM 79 327 PM 99 1983 75 4 74
MINIMUM 65 650 AM 40 1917 60 5 55
AVERAGE 72 67 5 65
PRECIPITATION (IN)
TODAY 0.00 5.63 1954 0.11 -0.11 0.00
MONTH TO DATE 0.86 1.17 -0.31 1.43
SINCE SEP 1 0.86 1.17 -0.31 1.43
SINCE JAN 1 18.42 29.21 -10.79 26.38
SNOWFALL (IN)
TODAY 0.0 0.0 2000 0.0 0.0 0.0
2001
2002
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
DEGREE DAYS
HEATING
TODAY 0 1 -1 0
MONTH TO DATE 1 9 -8 10
SINCE SEP 1 1 9 -8 10
SINCE JUL 1 1 18 -17 17
COOLING
TODAY 7 4 3 0
MONTH TO DATE 61 52 9 32
SINCE SEP 1 61 52 9 32
SINCE JAN 1 978 752 226 789
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION NW (320)
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION W (280)
AVERAGE WIND SPEED 10.5
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 59 400 AM
LOWEST 30 300 PM
AVERAGE 45
..........................................................
THE BOSTON MA CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 93 1961
MINIMUM TEMPERATURE (F) 60 43 1875
SUNRISE AND SUNSET
SEPTEMBER 11 2026.....SUNRISE 620 AM EDT SUNSET 701 PM EDT
SEPTEMBER 12 2026.....SUNRISE 621 AM EDT SUNSET 659 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 KBOS for the contract date, as archived verbatim at https://weathermarket.io/nws-cli/KBOS/2026-09-11 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.