NWS CLI archive · settlement source
CLIBOS · 보스턴 · America/New_York · ← 2026-09-11 · 2026-09-13 → · All dates for KBOS · JSON · METAR-derived record
Final issued 2026-09-13 01:35:00 EDT · Product id iem:CDUS41-KBOX-130535:BOS:2026-09-12:final · IEM archive
Product id iem:CDUS41-KBOX-130535:BOS:2026-09-12:final · iem-afos · IEM archive
SHA-256 2ad0af8398b90f421b02db016370e2284ec054dcd4cf848b95d58daa9996988b
Product text
CDUS41 KBOX 130535
CLIBOS
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
135 AM EDT SUN SEP 13 2026
...................................
...THE BOSTON MA CLIMATE SUMMARY FOR SEPTEMBER 12 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 71 239 PM 93 1961 75 -4 68
MINIMUM 56 433 AM 43 1875 60 -4 58
AVERAGE 64 67 -3 63
PRECIPITATION (IN)
YESTERDAY 0.00 2.95 1960 0.11 -0.11 0.00
MONTH TO DATE 0.86 1.28 -0.42 1.43
SINCE SEP 1 0.86 1.28 -0.42 1.43
SINCE JAN 1 18.42 29.32 -10.90 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 1 1 0 2
MONTH TO DATE 2 10 -8 12
SINCE SEP 1 2 10 -8 12
SINCE JUL 1 2 19 -17 19
COOLING
YESTERDAY 0 3 -3 0
MONTH TO DATE 60 55 5 32
SINCE SEP 1 60 55 5 32
SINCE JAN 1 977 755 222 789
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION E (110)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION E (90)
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION E (90)
AVERAGE WIND SPEED 8.8
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 72 1000 PM
LOWEST 54 1200 AM
AVERAGE 63
..........................................................
THE BOSTON MA CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 93 1957
MINIMUM TEMPERATURE (F) 59 45 1911
1985
SUNRISE AND SUNSET
SEPTEMBER 13 2026.....SUNRISE 622 AM EDT SUNSET 657 PM EDT
SEPTEMBER 14 2026.....SUNRISE 623 AM EDT SUNSET 655 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-122126:BOS:2026-09-12:interim · iem-afos · IEM archive
SHA-256 5290047e8e7a597eb24abc31d5ff7f16de194e87ef35f2cb4e5eff3231e91c95
Product text
CDUS41 KBOX 122126
CLIBOS
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
526 PM EDT SAT SEP 12 2026
...................................
...THE BOSTON MA CLIMATE SUMMARY FOR SEPTEMBER 12 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 71 239 PM 93 1961 75 -4 68
MINIMUM 56 433 AM 43 1875 60 -4 58
AVERAGE 64 67 -3 63
PRECIPITATION (IN)
TODAY 0.00 2.95 1960 0.11 -0.11 0.00
MONTH TO DATE 0.86 1.28 -0.42 1.43
SINCE SEP 1 0.86 1.28 -0.42 1.43
SINCE JAN 1 18.42 29.32 -10.90 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 1 1 0 2
MONTH TO DATE 2 10 -8 12
SINCE SEP 1 2 10 -8 12
SINCE JUL 1 2 19 -17 19
COOLING
TODAY 0 3 -3 0
MONTH TO DATE 60 55 5 32
SINCE SEP 1 60 55 5 32
SINCE JAN 1 977 755 222 789
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION E (90)
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION E (90)
AVERAGE WIND SPEED 7.6
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 70 400 AM
LOWEST 54 1200 AM
AVERAGE 62
..........................................................
THE BOSTON MA CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 93 1957
MINIMUM TEMPERATURE (F) 59 45 1911
1985
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.
$$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/2026-09-12 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.