Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out63.26766.5666.36766.01 F
Dew Temp17.527.822.4631.131.726.11 F
Humidity172319272722.6 %
Wind Speed4711.9366.4 mph
Wind Dir116167171.0144117Az=143
Pressure25.8225.8625.8925.8126.1+0.34 inHg
Precip 00 0 No Precip
Time PST13:42:5313:42:5113:42:5313:42:5213:42:5213:42:51
KAIT inch Rain & Dew 04-04-2026 13:42:53 No Rain rainint= 3% outdew= 1% indew= 0%
120 inch Rain & Dew 04-04-2026 13:42:47 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 04-04-2026 13:42:52 No Rain rainint= 0% outdew= 0% indew= 0%
Crossley Rain & Dew 04-04-2026 13:42:52 No Rain rainint= 0% outdew= 2% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter98927215910947163013:37:15
In per 0.24 liter776166 13:18:24

Estimated combined 0.3+0.5um particles weight as of 04-04-2026 13:37:15 is 5 ug/m3
Estimated PM2.5 Air Quality Index is 152 Unhealthy , TSP is 259 Above Secondary Standard

120 Dome Floor Air Particles 04-04-2026 13:18:24 0.3 um=776 0.5 um=166
Outside Air Particles by APF04-04-2026_13:37:15_0.3um=1581_0.5um=436_0.7um=254_1.0um=175_2.0um=76_3.0um=26_5.0um=5_10.0um=1_sc=20807024_fl=1.0_st=23_er=0_RH=20%_T=70.34F

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 8909 feet above MH & estimated cloud temp is -21 F