Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out64.665.569.2567.268.767.05 F
Dew Temp-4.313.117.0520.81913.13 F
Humidity61314171513 %
Wind Speed551.3554.3 mph
Wind Dir288320337.0310325Az=316
Pressure25.9225.9425.9625.8826.16+0.41 inHg
Precip 00 0 No Precip
Time PST10:50:5710:50:5810:50:5910:50:5610:50:5610:50:57
KAIT inch Rain & Dew 01-17-2026 10:50:57 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 01-17-2026 10:50:55 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 01-17-2026 10:50:56 No Rain rainint= 0% outdew= 0% indew= 0%
Crossley Rain & Dew 01-17-2026 10:50:56 No Rain rainint= 0% outdew= 1% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter382561810500010:48:36
In per 0.24 liter33450 10:32:49

Estimated combined 0.3+0.5um particles weight as of 01-17-2026 10:48:36 is 1 ug/m3
Estimated PM2.5 Air Quality Index is 16 Good , TSP is 18 Normal

120 Dome Floor Air Particles 01-17-2026 10:32:49 0.3 um=334 0.5 um=50
Outside Air Particles by APF01-17-2026_10:48:36_0.3um=611_0.5um=90_0.7um=29_1.0um=16_2.0um=8_3.0um=0_5.0um=0_10.0um=0_sc=14145300_fl=1.0_st=23_er=0_RH=14%_T=74.66F

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 11909 feet above MH & estimated cloud temp is -52 F