Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out 52.851.851 51.86 F
Dew Temp 44.444.644.7 44.56 F
Humidity 737779 76.33 %
Wind Speed 139.64 8.9 mph
Wind Dir 268273.0360 Az=297
Pressure25.6225.7325.7525.6726.01+0.2 inHg
Precip 00 0 No Precip
Time PST04:12:0719:02:3619:02:3719:02:3619:02:3219:02:37
KAIT inch Rain & Dew 09-04-2026 04:11:16 No Rain rainint= 2% outdew= 94% indew= 1%
120 inch Rain & Dew 09-04-2026 19:02:35 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 09-04-2026 19:02:36 No Rain rainint= 1% outdew= 0% indew= 0%
Crossley Rain & Dew 09-04-2026 19:02:35 No Rain rainint= 0% outdew= 0% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter93091323713429192131019:02:12
In per 0.24 liter21469967 ------

Estimated combined 0.3+0.5um particles weight as of 09-04-2026 19:02:12 is 43 ug/m3
Estimated PM2.5 Air Quality Index is 624 Hazardous , TSP is 788 on Alert

120 Dome Floor Air Particles 07-26-2026 19:41:57 0.3 um=21469 0.5 um=967
Outside Air Particles by APF09-04-2026_19:02:12_0.3um=13382_0.5um=1902_0.7um=1025_1.0um=617_2.0um=277_3.0um=19_5.0um=2_10.0um=0_sc=7264524_fl=0.9_st=23_er=0_RH=69%_T=53.78F

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 1909 feet above MH & estimated cloud temp is 34 F