Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out68.670.2 67.669.969.07 F
Dew Temp23.334.4 36.43632.52 F
Humidity1827 322926.5 %
Wind Speed31812.8368.6 mph
Wind Dir98182165.0152131Az=146
Pressure25.8925.94 25.8726.08--25.55 inHg
Precip 0 0 No Precip
Time PST01:44:3101:44:30M5 OUT01:44:3501:44:3001:44:46
KAIT inch Rain & Dew 10-17-2026 01:44:46 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 10-17-2026 01:44:42 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 10-17-2026 01:44:31 No Rain rainint= 1% outdew= 0% indew= 0%
Crossley Rain & Dew 10-17-2026 01:44:45 No Rain rainint= 0% outdew= 0% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter ------
In per 0.24 liter21469967 ------

Estimated combined 0.3+0.5um particles weight as of 10-17-2026 09:21:47 is 9 ug/m3
Estimated PM2.5 Air Quality Index is 130 Unhealthy for Sensitive Groups , TSP is 304 Above Primary Standard

120 Dome Floor Air Particles 07-26-2026 19:41:57 0.3 um=21469 0.5 um=967
Outside Air Particles by APF

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 8136 feet above MH & estimated cloud temp is -10 F