Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out82.482.984.5681.886.683.65 F
Dew Temp8.536.332.1841.329.729.59 F
Humidity61915241315.4 %
Wind Speed8106.9687.8 mph
Wind Dir291336268.0360230Az=297
Pressure25.8225.8825.8925.8125.93+0.34 inHg
Precip 00 0 No Precip
Time PST17:29:3517:29:3917:29:3917:29:3917:29:3717:29:39
KAIT inch Rain & Dew 08-07-2026 17:29:38 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 08-07-2026 17:29:39 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 08-07-2026 17:29:39 No Rain rainint= 0% outdew= 0% indew= 0%
Crossley Rain & Dew 08-07-2026 17:29:40 No Rain rainint= 0% outdew= 0% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter1005465820210550164017:28:16
In per 0.24 liter21469967 ------

Estimated combined 0.3+0.5um particles weight as of 08-07-2026 17:28:16 is 36 ug/m3
Estimated PM2.5 Air Quality Index is 162 Unhealthy , TSP is 315 Above Primary Standard

120 Dome Floor Air Particles 07-26-2026 19:41:57 0.3 um=21469 0.5 um=967
Outside Air Particles by APF08-07-2026_17:28:16_0.3um=14454_0.5um=946_0.7um=291_1.0um=151_2.0um=73_3.0um=24_5.0um=6_10.0um=0_sc=4840123_fl=0.9_st=23_er=0_RH=16%_T=89.42F

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 10590 feet above MH & estimated cloud temp is -22 F