NWS CLI archive · settlement source
CLIBOS · 보스턴 · America/New_York · ← 2026-09-14 · 2026-09-16 → · All dates for KBOS · JSON · METAR-derived record
Final issued 2026-09-16 02:15:00 EDT · Product id iem:CDUS41-KBOX-160615:BOS:2026-09-15:final · IEM archive
Product id iem:CDUS41-KBOX-160615:BOS:2026-09-15:final · iem-afos · IEM archive
SHA-256 f0ae434564b218b19321a4eb6fe72b7a33be1471638b864b14079f2fb43e490a
Product text
CDUS41 KBOX 160615
CLIBOS
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
215 AM EDT WED SEP 16 2026
...................................
...THE BOSTON MA CLIMATE SUMMARY FOR SEPTEMBER 15 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 66 1159 AM 94 1915 74 -8 72
MINIMUM 53 451 AM 41 1913 59 -6 60
AVERAGE 60 66 -6 66
PRECIPITATION (IN)
YESTERDAY 0.00 3.48 1904 0.12 -0.12 0.00
MONTH TO DATE 1.70 1.64 0.06 1.43
SINCE SEP 1 1.70 1.64 0.06 1.43
SINCE JAN 1 19.26 29.68 -10.42 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 5 2 3 0
MONTH TO DATE 7 16 -9 14
SINCE SEP 1 7 16 -9 14
SINCE JUL 1 7 25 -18 21
COOLING
YESTERDAY 0 3 -3 1
MONTH TO DATE 63 64 -1 35
SINCE SEP 1 63 64 -1 35
SINCE JAN 1 980 764 216 792
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION E (80)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION SE (120)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION SE (150)
AVERAGE WIND SPEED 8.2
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 80 1100 PM
LOWEST 57 1200 AM
AVERAGE 69
..........................................................
THE BOSTON MA CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 73 96 1939
MINIMUM TEMPERATURE (F) 58 42 1984
SUNRISE AND SUNSET
SEPTEMBER 16 2026.....SUNRISE 625 AM EDT SUNSET 652 PM EDT
SEPTEMBER 17 2026.....SUNRISE 626 AM EDT SUNSET 650 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-152132:BOS:2026-09-15:interim · iem-afos · IEM archive
SHA-256 71ef0b1d79cdc82d5e0e5af3e06aa02d371c25072b9aa9278e8ab856fac945de
Product text
CDUS41 KBOX 152132
CLIBOS
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
532 PM EDT TUE SEP 15 2026
...................................
...THE BOSTON MA CLIMATE SUMMARY FOR SEPTEMBER 15 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 66 1159 AM 94 1915 74 -8 72
MINIMUM 53 451 AM 41 1913 59 -6 60
AVERAGE 60 66 -6 66
PRECIPITATION (IN)
TODAY 0.00 3.48 1904 0.12 -0.12 0.00
MONTH TO DATE 1.70 1.64 0.06 1.43
SINCE SEP 1 1.70 1.64 0.06 1.43
SINCE JAN 1 19.26 29.68 -10.42 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 5 2 3 0
MONTH TO DATE 7 16 -9 14
SINCE SEP 1 7 16 -9 14
SINCE JUL 1 7 25 -18 21
COOLING
TODAY 0 3 -3 1
MONTH TO DATE 63 64 -1 35
SINCE SEP 1 63 64 -1 35
SINCE JAN 1 980 764 216 792
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION E (110)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION E (80)
AVERAGE WIND SPEED 8.1
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 71 500 AM
LOWEST 57 1200 AM
AVERAGE 64
..........................................................
THE BOSTON MA CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 73 96 1939
MINIMUM TEMPERATURE (F) 58 42 1984
SUNRISE AND SUNSET
SEPTEMBER 15 2026.....SUNRISE 624 AM EDT SUNSET 654 PM EDT
SEPTEMBER 16 2026.....SUNRISE 625 AM EDT SUNSET 652 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/2026-09-15 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.