Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out70.871.468.7269.969.970.14 F
Dew Temp26.434.535.0638.539.234.73 F
Humidity192629323327.8 %
Wind Speed983.6916.1 mph
Wind Dir207294183.0211223Az=220
Pressure25.8525.8925.9125.8326.04+0.36 inHg
Precip 00 0 No Precip
Time PST01:30:2001:30:1901:30:2001:30:1901:30:2001:30:20
KAIT inch Rain & Dew 03-18-2026 01:30:20 No Rain rainint= 4% outdew= 1% indew= 0%
120 inch Rain & Dew 03-18-2026 01:30:19 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 03-18-2026 01:30:19 No Rain rainint= 0% outdew= 0% indew= 0%
Crossley Rain & Dew 03-18-2026 01:30:16 No Rain rainint= 0% outdew= 21% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter74106912371314282001:23:01
In per 0.24 liter3390400 01:30:08

Estimated combined 0.3+0.5um particles weight as of 03-18-2026 01:23:01 is 30 ug/m3
Estimated PM2.5 Air Quality Index is 136 Unhealthy for Sensitive Groups , TSP is 236 Above Secondary Standard

120 Dome Floor Air Particles 03-18-2026 01:30:08 0.3 um=3390 0.5 um=400
Outside Air Particles by APF03-18-2026_01:23:01_0.3um=11836_0.5um=1105_0.7um=380_1.0um=210_2.0um=68_3.0um=14_5.0um=4_10.0um=0_sc=19294439_fl=1.0_st=23_er=0_RH=40%_T=67.46F

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 8386 feet above MH & estimated cloud temp is -12 F