Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out59.360.360.6259.261.160.1 F
Dew Temp14.424.120.6627.525.722.47 F
Humidity172521302623.8 %
Wind Speed23276.917616.0 mph
Wind Dir319333317.05312Az=329
Pressure25.725.7425.7625.6926.01+0.21 inHg
Precip 00 0 No Precip
Time PST17:47:4717:47:4617:47:4717:47:3617:47:4817:47:47
KAIT inch Rain & Dew 05-18-2026 17:47:43 No Rain rainint= 0% outdew= 1% indew= 0%
120 inch Rain & Dew 05-18-2026 17:47:46 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 05-18-2026 17:47:45 No Rain rainint= 0% outdew= 0% indew= 0%
Crossley Rain & Dew 05-18-2026 17:47:48 No Rain rainint= 0% outdew= 1% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter233724614911455239117:45:54
In per 0.24 liter1925349 17:37:36

Estimated combined 0.3+0.5um particles weight as of 05-18-2026 17:45:54 is 9 ug/m3
Estimated PM2.5 Air Quality Index is 178 Unhealthy , TSP is 496 on Attention

120 Dome Floor Air Particles 05-18-2026 17:37:36 0.3 um=1925 0.5 um=349
Outside Air Particles by APF05-18-2026_17:45:54_0.3um=3733_0.5um=393_0.7um=238_1.0um=183_2.0um=88_3.0um=37_5.0um=15_10.0um=2_sc=24622862_fl=1.0_st=23_er=0_RH=19%_T=69.26F

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 8227 feet above MH & estimated cloud temp is -21 F