Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out63.264.464.9464.465.664.5 F
Dew Temp43.147.945.8648.949.146.97 F
Humidity485550575553 %
Wind Speed1260455 mph
Wind Dir232326North290249Az=319
Pressure25.825.8325.8525.7626.04+0.3 inHg
Precip 00 0 No Precip
Time PST17:32:5617:32:5817:32:5817:32:5617:32:5717:32:58
KAIT inch Rain & Dew 08-18-2025 17:32:56 No Rain rainint= 0% outdew= 0% indew= 0%
120 inch Rain & Dew 08-18-2025 17:32:54 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 08-18-2025 17:32:56 No Rain rainint= 3% outdew= 1% indew= 0%
Crossley Rain & Dew 08-18-2025 17:32:54 No Rain rainint= 0% outdew= 0% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter314140820412036103017:26:09
In per 0.24 liter1068100 17:08:53

Estimated combined 0.3+0.5um particles weight as of 08-18-2025 17:26:09 is 14 ug/m3
Estimated PM2.5 Air Quality Index is 117 Unhealthy for Sensitive Groups , TSP is 218 Above Secondary Standard

120 Dome Floor Air Particles 08-18-2025 17:08:53 0.3 um=1068 0.5 um=100
Outside Air Particles by APF08-18-2025_17:26:09_0.3um=5017_0.5um=653_0.7um=326_1.0um=192_2.0um=58_3.0um=16_5.0um=6_10.0um=0_sc=1038681_fl=1.0_st=23_er=0_RH=45%_T=66.92F

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 3750 feet above MH & estimated cloud temp is 27 F