Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out66.667.869.869.270.768.81 F
Dew Temp5.625.121.7430.729.922.6 F
Humidity92016242218.2 %
Wind Speed9712.8287.8 mph
Wind Dir156146161.0126122Az=142
Pressure25.9225.9525.9725.8926.17+0.42 inHg
Precip 00 0 No Precip
Time PST14:04:2414:04:2314:04:2614:04:2314:04:2414:04:34
KAIT inch Rain & Dew 02-04-2026 14:04:27 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 02-04-2026 14:04:26 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 02-04-2026 14:04:23 No Rain rainint= 0% outdew= 0% indew= 0%
Crossley Rain & Dew 02-04-2026 14:04:30 No Rain rainint= 0% outdew= 1% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter400352926116155104013:59:21
In per 0.24 liter2667402 13:56:13

Estimated combined 0.3+0.5um particles weight as of 02-04-2026 13:59:21 is 18 ug/m3
Estimated PM2.5 Air Quality Index is 178 Unhealthy , TSP is 303 Above Primary Standard

120 Dome Floor Air Particles 02-04-2026 13:56:13 0.3 um=2667 0.5 um=402
Outside Air Particles by APF02-04-2026_13:59:21_0.3um=6395_0.5um=845_0.7um=418_1.0um=258_2.0um=89_3.0um=17_5.0um=7_10.0um=1_sc=15711662_fl=1.0_st=23_er=0_RH=17%_T=74.48F

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 9704 feet above MH & estimated cloud temp is -28 F