Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out37.838.939.0137.9 38.4 F
Dew Temp35.938.33237.9 36.02 F
Humidity9398100100 97.75 %
Wind Speed4143.69 7.7 mph
Wind Dir294309313.0360 Az=318
Pressure25.725.7325.7525.6826.1+0.2 inHg
Precip 00 0 Dew?
Time PST09:02:3509:02:3609:02:3609:02:3509:02:2909:02:35
KAIT inch Rain & Dew 01-07-2026 09:02:35 No Rain rainint= 2% outdew= 85% indew= 0%
120 inch Rain & Dew 01-07-2026 09:02:33 No Rain rainint= 0% outdew= 90% indew= 0%
40 inch Rain & Dew 01-07-2026 09:02:35 No Rain rainint= 2% outdew= 86% indew= 0%
Crossley Rain & Dew 01-07-2026 09:02:35 No Rain rainint= 3% outdew= 92% indew= 2%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter6478341434023388334231732943212608:57:26
In per 0.24 liter22438 08:47:38

Estimated combined 0.3+0.5um particles weight as of 01-07-2026 08:57:26 is 63 ug/m3
Estimated PM2.5 Air Quality Index is 10861 Hazardous , TSP is 286934 Urgent

120 Dome Floor Air Particles 01-07-2026 08:47:38 0.3 um=224 0.5 um=38
Outside Air Particles by APF01-07-2026_08:57:26_0.3um=7243_0.5um=3818_0.7um=3804_1.0um=3789_2.0um=3737_3.0um=3548_5.0um=3291_10.0um=2377_sc=13274779_fl=0.7_st=23_er=0_RH=101%_T=41.54F

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 136 feet above MH & estimated cloud temp is 37 F