Blue Hill Meteorological Observatory
42° 12' 44"N, 71° 06' 53"W, Elevation 635 feet
Milton, Massachusetts USA

 

Tuesday, May 19, 2026
7:40 AM (Eastern Standard Time)
Updated every 10 minutes
 
76.7°F
 24.8°C
Humidity72%
Dew Point67.0°F (19.4°C)
WindSW 10 G 16 mph
Heat Index78°F
Barometer30.048" (1017.6 mb)
Solar499 W/m2
Rainfall0.00" (0.00"/hr)
webcam
Facing WNW. Updated every 15 minutes.
Source: Camnet

 

Today's Highs and Lows
Temperature 76.7°F @ 7:39 AM
65.5°F @ 4:06 AM
Dew Point 67.0°F 7:39 AM
60.5°F 4:06 AM
Humidity 85% 4:08 AM
71% 7:38 AM
Wind Gust 24 mph SW @ 5:51 AM
Wind Speed 17 mph SW @ 12:03 AM
Barometer 30.104" 12:00 AM
30.047" 7:17 AM
Precipitation Max 0.00"1 12:00 AM
Last 24 hours 0.00"
Storm total 0.00"
Evapotranspiration 0.025"
Wind Chill Gust Min 64°F 4:07 AM
Wind Chill Avg Min 65°F 4:07 AM
Heat Index Max 78°F 7:32 AM
Sunshine Max 499 W/m2 7:39 AM
1. Instantaneous rainfall rate.


Yesterday May 18, 2026
  Maximum, Minimum Mean/Total
Temperature 84.8°F @ 4:10 PM
62.4°F @ 5:09 AM
73.6°
Dew Point 63.3°F 5:08 PM
44.0°F 3:47 AM
54.2°
Humidity 78% 11:50 PM
34% 12:34 PM
53.2%
Wind Gust 35 mph S @ 4:59 PM
11.8 159°
Wind Speed 23 mph S @ 5:01 PM
 
Barometer 30.249" 8:05 AM
30.087" 7:24 PM
30.159
Wind Chill Gust Min 60°F 5:08 AM
Wind Chill Avg Min 61°F 5:07 AM
Heat Index Max 85°F 3:49 PM
Sunshine Max 967 W/m2 10:41 AM 305.4
Degree Days Heating (Base 65°F): 0
Cooling (Base 65°F): 9
Precipitation   0.00"
Evapotranspiration   0.298"
Precipitation Types none
Snowfall 0.0"
Snowcover 0"


Forecast
Partly cloudy with little temperature change.


Number of Days
For May For 2026
Rain: 7
Snow: 0
Heavy Fog: 0
Thunder: 0
High ≥ 90°F: 0
Low ≤ 32°F: 0
High ≤ 32°F: 0
Low ≤ 0°F: 0
Cloudy: 0
Partly Cloudy: 0
Clear: 0
Rain: 45
Snow: 0
Heavy Fog: 0
Thunder: 0
High ≥ 90°F: 0
Low ≤ 32°F: 83
High ≤ 32°F: 30
Low ≤ 0°F: 2
Cloudy: 0
Partly Cloudy: 0
Clear: 0
Date of last rainfall: May 17, 2026 (2 days)


Observed Conditions
Precipitation types none
Snowfall today 0.0 inches
Snow on the ground 0 inches
Snowfall this season 0.0 inches
 
Degree Days
  Today Month Season
Heating - Base 65°F 0 150 5986
Cooling - Base 65°F 7 22 28
 
Wind Run
Today 105.0 miles
This month 5225.1 miles
This year 39248.7 miles


Sun, Moon
Twilight begins 3:56 AM
Sunrise 4:20 AM
Sunset 7:00 PM
Twilight ends 7:25 PM
Moonrise 6:30 AM
Moonset 10:50 PM
 
Sunshine Minutes (intensity ≥ 120 W/m2)
Today 98
This Month 10,993
This Year 59,339
Yesterday 699
One Year Ago 584


Monthly and Yearly Statistics
  Monthly
Maximum, Minimum, Mean/Total
Yearly
Maximum, Minimum, Mean/Total
Temperature °F 86.3° on May 17 3:37 PM
40.4° on May 8 3:40 AM
Mean 57.8°
86.3° on May 17 3:37 PM
-0.9° on Jan 31 5:34 AM
Mean 39.3°
Dew Point °F 67.0° on May 19 7:39 AM
25.3° on May 3 6:33 PM
Mean 43.5°
67.0° on May 19 7:39 AM
-14.2° on Jan 24 7:40 AM
Mean 28.9°
Humidity 98% on May 15 6:50 AM
27% on May 4 12:50 PM
Mean 65.1%
98% on Mar 7 3:12 AM
18% on Apr 9 1:08 PM
Mean 70.6%
Wind Gust (mph) S 47 on May 5 3:56 PM
WNW 0 on May 1 9:30 PM
Mean 234° 11.9
S 90 on Mar 17 12:22 AM
NNW 0 on Jan 4 9:36 AM
Mean 244° 11.8
Wind Speed S 30 on May 13 2:54 PM
N 0 on May 1 6:15 AM
S 57 on Mar 17 12:12 AM
N 0 on Jan 4 9:06 AM
Barometer 30.249" on May 18 8:05 AM
29.694" on May 14 5:22 PM
Mean 29.918"
30.708" on Mar 2 10:38 AM
29.304" on Mar 17 2:16 AM
Mean 30.021"
Precipitation Total 0.96" Total 93.08"
Evapotranspiration Total 3.153" Total 12.821"
Wind Chill Gust °F Min 32° on May 3 5:53 AM Min -27° on Feb 8 6:42 AM
Wind Chill Avg °F Min 33° on May 3 11:26 PM Min -25° on Feb 8 6:43 AM
Heat Index °F Max 86° on May 17 3:03 PM Max 86° on May 17 3:03 PM
Sunshine (W/m2) Max 1225 on May 12 12:17 PM
Mean 221.7
Max 1227 on Apr 6 12:09 PM
Mean 141.5
Extremes are the first of multiple occurrences.


All-Time Records
  Maximum, Minimum
Temperature °F 99.1° on Jul 6, 2010 1:59 PM
-13.4° on Feb 4, 2023 5:47 AM
Dew Point °F 81.5° on Jul 20, 2019 1:48 PM
-79.1° on Nov 26, 2009 3:18 AM
Humidity 100% on Apr 24, 2004 7:18 AM
0% on Apr 5, 2007 8:24 AM
Wind Gust (mph) SSE 95 on Dec 19, 2023 11:31 AM
ESE 0 on Apr 21, 2004 1:52 AM
Wind Speed S 57 on Apr 13, 2020 3:38 PM
SSW 0 on Apr 21, 2004 2:06 AM
Barometer 30.932" on Dec 14, 2024 10:03 AM
28.675" on Feb 7, 2020 2:58 PM
Precipitation Max rate 96.00"/hr on Jan 12, 2005 5:44 PM
Evapotranspiration Max day 2.823" on Dec 31, 2009 12:00 PM
Wind Chill Gust °F Min -138° on Feb 3, 2023 3:33 AM
Wind Chill Avg °F Min -134° on Feb 3, 2023 3:36 AM
Heat Index °F Max 113° on Jun 20, 2024 12:23 PM
Sunshine (W/m2) Max 1498 on Jul 13, 2024 11:20 AM
Records begin 04/20/2004.
Extremes are the first of multiple occurrences.


Battery Status
Transmitters All OK
Console 4.71V

 

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