Friday, January 2, 2026

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA FRIDAY, JANUARY 2, 2026 ALL TIMES ARE IN EASTERN STANDARD TIME (EST) SUNRISE: 0713E SUNSET:  1623E SKIES CLEARING BY MID MORNING WITH CONTINUED BELOW NORMAL TEMPERATURES…. We started the day under overcast conditions but clearing began during the mid morning hours. By the afternoon we had thinly scattered skies with plenty of bright sunshine and blue skies. Temperatures were in the lower teens during the overnight and early morning, and have ‘recovered’ to the mid 20’s, which is still about 11 degrees below normal. Wind chills this morning were in the negative and single digits and have improved to the teens as of this afternoon. Dew points have remained in the single digits throughout the day today, contributing to the persisting chill in the air. The wind has been a bit lighter today compared to yesterday, but we have still had a decent flow out of the west-southwest for much of the day. The average speed for the day so far is around 11mph. The peak gust so far is 26mph, which occurred just after 12:30am this morning. Visibility has hovered between 50-60 miles today, with the best viewing during the early morning hours. The maximum temperature so far today is 25F degrees, which is 11 degrees below the normal high of 36F. The minimum temperature since midnight is 12F degrees, which is 9 degrees below the normal low of 21F. ————————————————————– PRELIMINARY STATS FOR DECEMBER 2025 TEMPERATURE, Deg. F Avg. Max. 36.0 [-4.2] Avg. Min. 20.9 [-4.0] Mean      28.5 [-4.0] 24-hour corrected mean: 28.9 Max. for month: 58F on the 19th Min. for month:  8F on the 5th, 26th HEATING DEGREE DAYS Total heating units:   1123 [+117] Total for the season:  2240 [+030] Total for last season: 1932 COOLING DEGREE DAYS Total cooling units:      0 [+000] Total for the season:   756 [+079] Total for last season:  768 PRECIPITATION, Inches Total: 2.73 [-2.66] Greatest in 24 hrs: 0.91 on the 2nd-3rd SNOWFALL, Inches Total: 6.8 [-5.8] Greatest in 24 hrs: 3.6 on the 26th-27th WIND, mph Avg. uncorrected wind speed: 13.4 mph Avg. corrected wind speed:   13.7 mph Prevailing wind direction:   West [16%] Peak gust and direction:     79 S on the 19th SUNSHINE: Campbell-Stokes card minutes: 9000 of a possible 16470, or 55% Astronomical total minutes: 9304 of a possible 16998 or 55% ————————————————————– Today’s Observations: 7 A.M. Weather: Overcast altocumulus, few stratocumulus distant NE-E Temperature: 14F; Dew Point: 6F; Relative Humidity: 71% Wind: WSW @ 9 kts Sea-level pressure: 1007.2 mb; 29.74 in. Hg: falling, then steady Visibility: 60 miles 6-hr Max temp: 14F 6-hr Min temp: 12F 24-hr Precip: 0.15 inches 24-hr Snowfall: 2.2 inches Snow Depth: 2 inches BHO SA 1155 E110 OVC 60 072/14/6/2609/974/ FEW SC DSNT NE-E TOTAL NEW SNW PST 24 HRS 2.2 INS/ 8/55/ 4/002 56010 70015 10014 20012 10 A.M. Weather: Scattered altocumulus, few stratocumulus distant NE-E and WSW-W Temperature: 18F; Dew Point: 8F; Relative Humidity: 63% Wind: WSW @ 8 kts Sea-level pressure: 1007.4 mb; 29.75 in. Hg: steady, then rising Visibility: 50 miles 3-hr Precip: 0.00 inches 3-hr Snowfall: 0.0 inches BHO SA 1455 100 SCT 50 074/18/8/2508/975/ FEW SC DSNT NE-E AND WSW-W/ 8/550 53002 1 P.M. Weather: Thinly scattered stratocumulus, few altocumulus ESE-SSW Temperature: 25F; Dew Point: 9F; Relative Humidity: 50% Wind: W @ 8 kts Sea-level pressure: 1004.8 mb; 29.67 in. Hg: falling, then more rapidly Visibility: 50 miles 6-hr Max temp: 25F 6-hr Min temp: 14F 6-hr Precip: 0.0 inches 6-hr Snowfall: 0.0 inches Snow Depth: 2 inches BHO SA 1755 50 SCT 50 048/25/9/2708/967/ FEW AC ESE-SSW/ 8/550 4/002 58026 10025 20014 ————————————————————– SUMMARY FOR THURSDAY, JANUARY 1, 2026 TEMPERATURE (DEGREES F) MAX…….29   NORMAL…..36 MIN…….11   NORMAL…..21 MEAN……20   NORMAL…..29 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-9 TOTAL DEPARTURE FOR THE MONTH……………………….-9 [-9.2 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026) TOTAL HEATING UNITS FOR YESTERDAY…………….45  DEPARTURE……..+8 TOTAL HEATING UNITS FOR THE MONTH…………….45  DEPARTURE……..+9 TOTAL HEATING UNITS FOR THE SEASON………….2285  DEPARTURE…….+39 TOTAL HEATING UNITS LAST SEASON TO DATE……..1955  DEPARTURE……+330 PEAK WIND GUST (MPH): Note: Instruments designated #1 = Main Tower, #2 = South Tower, F420C, Contacting, Merlin, and Richards are all on Main Tower. E=Estimated *=Last of multiple occurrences F420C (Official)………..43 NW   @   08:52 A.M. VECTOR #1 (1-Sec)……….43 NW   @   08:52 A.M. VECTOR #2 (1-Sec)……….43 NW   @   08:52 A.M. DAVIS #1……………….40 W    @   05:56 P.M. DAVIS #2 ………………38 NW   @   08:52 A.M. RMY #1 (Instantaneous)…..42 WNW  @   07:38 P.M. RMY #2 (Instantaneous)…..45 NW   @   08:52 A.M. MERLIN…………………37 NW RICHARDS (C5C) (Inst)……41 WNW  @   09:40 A.M. FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL………………30 NW   @   08:53 A.M. MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..27 NW   @   08:53 A.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..30 NW   @   08:53 A.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………28 NW   @   08:53 A.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………29 WNW  @   07:40 P.M. MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..27 NW   @   08:53 A.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..29 NW   @   08:53 A.M. MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………26 NW   @   08:53 A.M. AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL……..17.0 WNW [407 total miles] VECTOR #1………………16.4 VECTOR #2………………17.7 DAVIS #1……………….17.0 W DAVIS #2……………….17.5 WNW RMY #1…………………15.8 W RMY #2…………………17.4 WSW RICHARDS (C5C)………….16.3 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.11 DEPARTURE…..-0.04 TOTAL PRECIPITATION FOR THE MONTH (DEC)……..0.15 DEPARTURE……0.00 TOTAL PRECIPITATION FOR THE YEAR (2025)……..0.15 DEPARTURE……0.00 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..2.2 DEPARTURE…..+1.6 TOTAL SNOWFALL FOR THE MONTH (DEC)…………..2.7 DEPARTURE…..+2.1 TOTAL SNOWFALL FOR THE SEASON (2025-2026)…….9.6 DEPARTURE…..-6.1 ————————————————————– PRELIMINARY CLIMATE SUMMARY FOR JANUARY CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST PEAK GUST: F420C (Official) VEC1: Vector #1 1-second gust RMY:  R.M. Young #1 wind gust recording system (Instantaneous) TSTM: Thunderstorm day (thunder heard some time during day) ….: Data not yet available, records not finalized M:    Missing data 1/1   29/11/20/-9/0.15/2.7/…/..          43 NW  VEC1 43 NW  RMY 42 1/2  The low since midnight is 12F, the daily normal low is 21F. ————————————————————– JANUARY DAILY RECORDS TO DATE NONE. ————————————————————– PRELIMINARY CLIMATE SUMMARY FOR DECEMBER CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST PEAK GUST: F420C (Official) VEC1: Vector #1 1-second gust RMY:  R.M. Young #1 wind gust recording system (Instantaneous) TSTM: Thunderstorm day (thunder heard some time during day) ….: Data not yet available, records not finalized M:    Missing data 12/1   42/27/35/-2/T/0.0/547/98          37 WNW VEC1 37 WNW RMY 38 12/2   36/27/32/-5/0.85/T/000/00         38 N   VEC1 38 NNE RMY 38 12/3   37/27/32/-4/0.06/0.6/423/76       28 NW  VEC1 29 NNW RMY 30 12/4   38/15/27/-9/T/T/255/46            60 NW  VEC1 59 WNW RMY 61 12/5   25/8/17/-19/T/T/510/92            30 NW  VEC1 30 NW  RMY 30 12/6   39/25/32/-3/T/T/122/22            21 W   VEC1 21 W   RMY 22 12/7   39/27/33/-2/0.00/0.0/248/45       24 W   VEC1 24 W   RMY 24 12/8   31/12/22/-13/T/T/457/83           43 NW  VEC1 43 NW  RMY 44 12/9   28/9/19/-15/0.00/0.0/452/82       33 SSW VEC1 33 SSW RMY 33 12/10  46/28/37/+3/0.04/T/187/34         50 SSW VEC1 50 SSW RMY 51 12/11  37/21/29/-5/0.00/0.0/450/82       51 WNW VEC1 51 WNW RMY 53 12/12  33/18/26/-8/0.00/0.0/532/97       41 W   VEC1 41 W   RMY 42 12/13  34/23/29/-4/0.00/0.0/038/07       28 SW  VEC1 28 SW  RMY 31 12/14  31/15/23/-10/0.13/1.8/000/00      39 NNW VEC1 39 NNW RMY 40 12/15  23/10/17/-16/0.00/0.0/496/91      40 NW  VEC1 40 NW  RMY 42 12/16  36/19/28/-4/0.00/0.0/437/80       29 SW  VEC1 29 SW  RMY 30 12/17  45/25/35/+3/0.00/0.0/196/36       43 SW  VEC1 42 SW  RMY 43 12/18  47/32/40/+8/0.00/0.0/539/99       32 S   VEC1 32 S   RMY 34 12/19  58/32/45/+13/0.60/T/000/00        79 S   VEC1 79 S   RMY 81 12/20  36/27/32/+1/0.00/0.0/446/82       46 WNW VEC1 46 WNW RMY 45 12/21  45/28/37/+6/0.00/0.0/480/88       46 SSW VEC1 46 SSW RMY 46 12/22  31/22/27/-4/0.00/0.0/539/99       44 NW  VEC1 44 NW  RMY 44 12/23  35/26/31/0/0.19/0.8/000/00        20 SE  VEC1 18 SSE RMY 19 12/24  36/24/30/0/0.03/T/180/33          50 NNW VEC1 49 NNW RMY 52 12/25  38/16/27/-3/T/T/071/13            55 NNW VEC1 55 NNW RMY 60 12/26  21/8/15/-15/0.09/1.4/393/72       33 NNW VEC1 33 NNW RMY 34 12/27  25/14/20/-10/0.14/2.2/245/45      23 N   VEC1 23 N   RMY 24 12/28  36/14/25/-4/0.04/0.0/453/83       26 SSW VEC1 26 SSW RMY 26 12/29  47/29/38/+9/0.58/T/000/00         53 W   VEC1 50 W   RMY 53 12/30  29/20/25/-4/0.00/0.0/279/51       59 WNW VEC1 59 WNW RMY 63 12/31  32/21/27/-2/0.00/0.0/329/60       37 W   VEC1 37 W   RMY 39 ————————————————————– DECEMBER DAILY RECORDS TO DATE 12/19 PEAK GUST OF 79 MPH S, BEAT THE OLD RECORD OF 68 MPH NE IN 1986. ————————————————————– DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR JANUARY 2 HIGH 62F IN 1890 LOW -7F IN 1899,1918 PRECIP 2.10 INS. IN 1987 SNOWFALL 10.9 INS. IN 2014 PEAK GUST 85e MPH S IN 1942 RECORDS FOR JANUARY 3 HIGH 64F IN 2000 LOW -4F IN 1904 PRECIP 1.93 INS. IN 1999 SNOW 11.3 INS. 1996 PEAK GUST 92 MPH S IN 1960 TODAY’S REPORT PREPARED BY: Amanda Joly