Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out60.160.959.5459.461.460.26 F
Dew Temp31.438.736.1439.639.737.1 F
Humidity344442484542.6 %
Wind Speed568.9365.8 mph
Wind Dir147171152.014798Az=144
Pressure25.7825.8225.8425.7626.01+0.29 inHg
Precip 00 0 No Precip
Time PST21:29:0721:29:0821:29:0721:29:0621:29:0521:29:07
KAIT inch Rain & Dew 11-11-2025 21:29:04 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 11-11-2025 21:29:04 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 11-11-2025 21:29:06 No Rain rainint= 1% outdew= 0% indew= 0%
Crossley Rain & Dew 11-11-2025 21:29:05 No Rain rainint= 0% outdew= 1% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter235131516311145123021:28:28
In per 0.24 liter1030135 21:16:24

Estimated combined 0.3+0.5um particles weight as of 11-11-2025 21:28:28 is 10 ug/m3
Estimated PM2.5 Air Quality Index is 146 Unhealthy for Sensitive Groups , TSP is 246 Above Secondary Standard

120 Dome Floor Air Particles 11-11-2025 21:16:24 0.3 um=1030 0.5 um=135
Outside Air Particles by APF11-11-2025_21:28:28_0.3um=3381_0.5um=453_0.7um=235_1.0um=161_2.0um=66_3.0um=18_5.0um=5_10.0um=0_sc=8395913_fl=0.9_st=23_er=0_RH=41%_T=60.62F

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 5045 feet above MH & estimated cloud temp is 11 F