Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out36.337.737.0436.93837.18 F
Dew Temp34.637.43236.937.135.6 F
Humidity94991001009798 %
Wind Speed5825.58610.5 mph
Wind Dir230146176.0360109Az=156
Pressure25.7825.8125.8325.7726.22+0.28 inHg
Precip 00 0 Fog?
Time PST22:23:0322:23:0622:23:0622:23:0322:23:0422:23:06
KAIT inch Rain & Dew 02-11-2026 22:23:03 No Rain rainint= 0% outdew= 93% indew= 0%
120 inch Rain & Dew 02-11-2026 22:23:03 No Rain rainint= 0% outdew= 95% indew= 0%
40 inch Rain & Dew 02-11-2026 22:23:03 Raining! rainint= 15% outdew= 98% indew= 0%
Crossley Rain & Dew 02-11-2026 22:23:04 No Rain rainint= 7% outdew= 97% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter1862125912281206115210017599022:15:31
In per 0.24 liter510247 21:54:09

Estimated combined 0.3+0.5um particles weight as of 02-11-2026 22:15:31 is 21 ug/m3
Estimated PM2.5 Air Quality Index is 3744 Hazardous , TSP is 26558 Urgent

120 Dome Floor Air Particles 02-11-2026 21:54:09 0.3 um=510 0.5 um=247
Outside Air Particles by APF02-11-2026_22:15:31_0.3um=1862_0.5um=1259_0.7um=1228_1.0um=1206_2.0um=1152_3.0um=1001_5.0um=759_10.0um=90_sc=16346119_fl=0.0_st=23_er=0_RH=101%_T=39.02F

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 68 feet above MH & estimated cloud temp is 37 F