Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out44.945.744.96 45.545.26 F
Dew Temp-0.19.88.24 13.27.78 F
Humidity152322 2721.75 %
Wind Speed191822.4 816.9 mph
Wind Dir142226165.0 94Az=155
Pressure25.5925.6425.6625.5925.92+0.11 inHg
Precip 00 0 No Precip
Time PST23:28:2223:28:2023:28:2223:28:2223:28:2223:28:22
KAIT inch Rain & Dew 04-19-2026 23:28:22 No Rain rainint= 3% outdew= 1% indew= 0%
120 inch Rain & Dew 04-19-2026 23:28:20 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 04-19-2026 23:28:22 No Rain rainint= 1% outdew= 0% indew= 0%
Crossley Rain & Dew 04-19-2026 23:28:18 No Rain rainint= 0% outdew= 1% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter1483243129812820023:19:03
In per 0.24 liter952129 23:20:15

Estimated combined 0.3+0.5um particles weight as of 04-19-2026 23:19:03 is 7 ug/m3
Estimated PM2.5 Air Quality Index is 91 Moderate , TSP is 115 Normal

120 Dome Floor Air Particles 04-19-2026 23:20:15 0.3 um=952 0.5 um=129
Outside Air Particles by APF04-19-2026_23:19:03_0.3um=2133_0.5um=350_0.7um=186_1.0um=117_2.0um=41_3.0um=4_5.0um=0_10.0um=0_sc=22137702_fl=0.9_st=23_er=0_RH=26%_T=46.04F

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 8159 feet above MH & estimated cloud temp is -35 F