Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out74.974.675.27478.175.35 F
Dew Temp3.140.933.794232.430.43 F
Humidity63022321921.8 %
Wind Speed1184.3746.9 mph
Wind Dir262338320.0342251Az=304
Pressure25.7525.825.8125.7325.9+0.26 inHg
Precip 00 0 No Precip
Time PST17:31:5117:31:5417:31:5317:31:5217:31:5217:31:54
KAIT inch Rain & Dew 07-24-2026 17:31:48 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 07-24-2026 17:31:54 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 07-24-2026 17:31:52 No Rain rainint= 0% outdew= 0% indew= 0%
Crossley Rain & Dew 07-24-2026 17:31:52 No Rain rainint= 0% outdew= 0% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter2145336155894593017:29:42
In per 0.24 liter1886062 ------

Estimated combined 0.3+0.5um particles weight as of 07-24-2026 17:29:42 is 10 ug/m3
Estimated PM2.5 Air Quality Index is 146 Unhealthy for Sensitive Groups , TSP is 235 Above Secondary Standard

120 Dome Floor Air Particles 07-21-2026 06:51:26 0.3 um=18860 0.5 um=62
Outside Air Particles by APF07-24-2026_17:29:42_0.3um=3427_0.5um=538_0.7um=248_1.0um=143_2.0um=72_3.0um=15_5.0um=5_10.0um=0_sc=3630834_fl=1.0_st=23_er=0_RH=19%_T=88.7F

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 7659 feet above MH & estimated cloud temp is -1 F