Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out59.160.959.5458.360.459.64 F
Dew Temp35.241.640.2844.144.241.07 F
Humidity414949595550.6 %
Wind Speed61210.7668.1 mph
Wind Dir165178146.0155104Az=150
Pressure25.8225.8525.8625.7826.05+0.31 inHg
Precip 00 0 No Precip
Time PST02:31:2802:31:2902:31:2902:31:2802:31:2802:31:29
KAIT inch Rain & Dew 10-19-2025 02:31:28 No Rain rainint= 1% outdew= 0% indew= 0%
120 inch Rain & Dew 10-19-2025 02:31:29 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 10-19-2025 02:31:28 No Rain rainint= 1% outdew= 0% indew= 0%
Crossley Rain & Dew 10-19-2025 02:31:28 No Rain rainint= 0% outdew= 0% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter573658524912341142002:23:00
In per 0.24 liter2970331 02:08:20

Estimated combined 0.3+0.5um particles weight as of 10-19-2025 02:23:00 is 23 ug/m3
Estimated PM2.5 Air Quality Index is 133 Unhealthy for Sensitive Groups , TSP is 244 Above Secondary Standard

120 Dome Floor Air Particles 10-19-2025 02:08:20 0.3 um=2970 0.5 um=331
Outside Air Particles by APF10-19-2025_02:23:00_0.3um=9162_0.5um=935_0.7um=399_1.0um=197_2.0um=67_3.0um=23_5.0um=4_10.0um=0_sc=6340351_fl=1.0_st=23_er=0_RH=50%_T=59.36F

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 4386 feet above MH & estimated cloud temp is 17 F