NWS CLI archive · settlement source
CLIBOS · 보스턴 · America/New_York · ← 2026-09-16 · 2026-09-18 → · All dates for KBOS · JSON · METAR-derived record
Final issued 2026-09-18 02:56:00 EDT · Product id iem:CDUS41-KBOX-180656:BOS:2026-09-17:final · IEM archive
Product id iem:CDUS41-KBOX-180656:BOS:2026-09-17:final · iem-afos · IEM archive
SHA-256 59e516539567cef7452f9d3410316beb5ef9a9b999285d0eb2db539f5262242a
Product text
CDUS41 KBOX 180656
CLIBOS
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
256 AM EDT FRI SEP 18 2026
...................................
...THE BOSTON MA CLIMATE SUMMARY FOR SEPTEMBER 17 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 76 456 PM 91 1915 73 3 70
MINIMUM 64 554 AM 44 2013 58 6 56
AVERAGE 70 65 5 63
PRECIPITATION (IN)
YESTERDAY T 2.77 1995 0.13 -0.13 0.01
MONTH TO DATE 1.70 1.90 -0.20 1.44
SINCE SEP 1 1.70 1.90 -0.20 1.44
SINCE JAN 1 19.26 29.94 -10.68 26.39
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 2 -2 2
MONTH TO DATE 7 20 -13 18
SINCE SEP 1 7 20 -13 18
SINCE JUL 1 7 29 -22 25
COOLING
YESTERDAY 5 3 2 0
MONTH TO DATE 71 70 1 35
SINCE SEP 1 71 70 1 35
SINCE JAN 1 988 770 218 792
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION S (180)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION SW (230)
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION SW (230)
AVERAGE WIND SPEED 7.1
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 600 AM
LOWEST 71 1000 AM
AVERAGE 84
..........................................................
THE BOSTON MA CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 72 90 1891
1906
1955
MINIMUM TEMPERATURE (F) 58 43 1875
SUNRISE AND SUNSET
SEPTEMBER 18 2026.....SUNRISE 627 AM EDT SUNSET 648 PM EDT
SEPTEMBER 19 2026.....SUNRISE 628 AM EDT SUNSET 647 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-172141:BOS:2026-09-17:interim · iem-afos · IEM archive
SHA-256 a254903fe4ef7a230b2d9166e13e5742d8a491b6f1c09ee8a55b099a0394ead0
Product text
CDUS41 KBOX 172141
CLIBOS
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
541 PM EDT THU SEP 17 2026
...................................
...THE BOSTON MA CLIMATE SUMMARY FOR SEPTEMBER 17 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 75 1006 AM 91 1915 73 2 70
MINIMUM 64 554 AM 44 2013 58 6 56
AVERAGE 70 65 5 63
PRECIPITATION (IN)
TODAY 0.00 2.77 1995 0.13 -0.13 0.01
MONTH TO DATE 1.70 1.90 -0.20 1.44
SINCE SEP 1 1.70 1.90 -0.20 1.44
SINCE JAN 1 19.26 29.94 -10.68 26.39
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 2 -2 2
MONTH TO DATE 7 20 -13 18
SINCE SEP 1 7 20 -13 18
SINCE JUL 1 7 29 -22 25
COOLING
TODAY 5 3 2 0
MONTH TO DATE 71 70 1 35
SINCE SEP 1 71 70 1 35
SINCE JAN 1 988 770 218 792
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION E (100)
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION E (100)
AVERAGE WIND SPEED 4.1
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 600 AM
LOWEST 71 1000 AM
AVERAGE 84
..........................................................
THE BOSTON MA CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 72 90 1891
1906
1955
MINIMUM TEMPERATURE (F) 58 43 1875
SUNRISE AND SUNSET
SEPTEMBER 17 2026.....SUNRISE 626 AM EDT SUNSET 650 PM EDT
SEPTEMBER 18 2026.....SUNRISE 627 AM EDT SUNSET 648 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/2026-09-17 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.