Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out35.937.535.9636.637.736.73 F
Dew Temp30.931.931.8232.232.131.78 F
Humidity828085848082.2 %
Wind Speed133011.022015.2 mph
Wind Dir347339349.036309Az=347
Pressure25.7725.8125.8325.7626.19+0.28 inHg
Precip 00 0 No Precip
Time PST01:31:4001:31:4101:31:4001:31:4101:31:4001:31:40
KAIT inch Rain & Dew 03-05-2026 01:31:40 Raining! rainint= 65% outdew= 86% indew= 0%
120 inch Rain & Dew 03-05-2026 01:31:41 No Rain rainint= 0% outdew= 5% indew= 0%
40 inch Rain & Dew 03-05-2026 01:31:41 No Rain rainint= 5% outdew= 3% indew= 0%
Crossley Rain & Dew 03-05-2026 01:31:40 No Rain rainint= 0% outdew= 5% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter18977625163308680001:31:13
In per 0.24 liter965388 01:17:18

Estimated combined 0.3+0.5um particles weight as of 03-05-2026 01:31:13 is 15 ug/m3
Estimated PM2.5 Air Quality Index is 279 Very Unhealthy , TSP is 370 Above Primary Standard

120 Dome Floor Air Particles 03-05-2026 01:17:18 0.3 um=965 0.5 um=388
Outside Air Particles by APF03-05-2026_01:31:13_0.3um=2122_0.5um=853_0.7um=577_1.0um=369_2.0um=97_3.0um=10_5.0um=1_10.0um=0_sc=18171937_fl=0.7_st=23_er=0_RH=87%_T=37.04F

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 1272 feet above MH & estimated cloud temp is 24 F