Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out57.959.257.257.658.858.14 F
Dew Temp30.137.735.638.538.536.08 F
Humidity354544494744 %
Wind Speed010.2020.6 mph
Wind Dir808583.0113266Az=92
Pressure25.8525.8825.925.8226.13+0.35 inHg
Precip 00 0 No Precip
Time PST17:52:5817:52:5917:53:0017:52:5717:53:0017:53:00
KAIT inch Rain & Dew 12-14-2025 17:52:58 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 12-14-2025 17:52:59 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 12-14-2025 17:52:57 No Rain rainint= 1% outdew= 0% indew= 0%
Crossley Rain & Dew 12-14-2025 17:52:57 No Rain rainint= 0% outdew= 0% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter111912354311232017:52:13
In per 0.24 liter71884 17:41:18

Estimated combined 0.3+0.5um particles weight as of 12-14-2025 17:52:13 is 4 ug/m3
Estimated PM2.5 Air Quality Index is 39 Good , TSP is 81 Normal

120 Dome Floor Air Particles 12-14-2025 17:41:18 0.3 um=718 0.5 um=84
Outside Air Particles by APF12-14-2025_17:52:13_0.3um=1610_0.5um=178_0.7um=78_1.0um=45_2.0um=18_3.0um=5_5.0um=3_10.0um=0_sc=11233628_fl=0.9_st=23_er=0_RH=45%_T=56.12F

Out Particle Warning 0.24/L 0.3:21400 0.5:1750 0.7:650 1.0:400 2.0:130 3.0:60 5.0:18 10.0:2
Out Particle Closure 0.24/L 0.3:30600 0.5:2500 0.7:2000 1.0:1200 2.0:400 3.0:180 5.0:60 10.0:3
In Particle Warning 0.24/L 0.3:12000 0.5:980 In Particle Closure 0.24/L 0.3:17000 0.5:1400
Davis40 precip = rain rate * 0.01"/Hr Davis120 precip = 120" teles dew sensor 0=dry 100=wet closure~>15
Avg pressure = deviation 0.01 X in Hg from MH normal - VaisaAPF precip 0=norain 1=rain
If clouds visible overhead: estimated cloud base is at 4886 feet above MH & estimated cloud temp is 11 F