Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out57 55.2255.657.656.35 F
Dew Temp41 47.6648.548.346.36 F
Humidity55 76777169.75 %
Wind Speed13 4.31178.8 mph
Wind Dir311 316.0321298Az=311
Pressure25.825.8525.8725.7926.09+0.32 inHg
Precip00 0 No Precip
Time PST19:36:1519:36:1419:36:1819:36:1519:36:1719:36:18
KAIT inch Rain & Dew 09-18-2026 19:36:15 No Rain rainint= 2% outdew= 1% indew= 0%
120 inch Rain & Dew 09-18-2026 19:36:17 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 09-18-2026 19:36:15 No Rain rainint= 1% outdew= 0% indew= 0%
Crossley Rain & Dew 09-18-2026 19:36:17 No Rain rainint= 0% outdew= 1% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter141011915791422184227119:29:22
In per 0.24 liter21469967 ------

Estimated combined 0.3+0.5um particles weight as of 09-18-2026 19:29:22 is 65 ug/m3
Estimated PM2.5 Air Quality Index is 598 Hazardous , TSP is 998 Urgent

120 Dome Floor Air Particles 07-26-2026 19:41:57 0.3 um=21469 0.5 um=967
Outside Air Particles by APF09-18-2026_19:29:22_0.3um=20271_0.5um=2754_0.7um=1138_1.0um=607_2.0um=265_3.0um=32_5.0um=11_10.0um=2_sc=711334_fl=0.9_st=23_er=0_RH=72%_T=55.76F

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 2272 feet above MH & estimated cloud temp is 35 F