Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out67.168.865.4867.4 67.19 F
Dew Temp45.55249.151.7 49.57 F
Humidity46555557 53.25 %
Wind Speed542.93 3.7 mph
Wind Dir289288.0337 Az=49
Pressure25.7725.7925.825.7225.92+0.25 inHg
Precip 00 0 No Precip
Time PST20:19:4420:19:4420:19:4420:19:4220:19:4220:19:44
KAIT inch Rain & Dew 09-15-2025 20:19:41 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 09-15-2025 20:19:44 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 09-15-2025 20:19:42 No Rain rainint= 1% outdew= 0% indew= 0%
Crossley Rain & Dew 09-15-2025 20:19:42 No Rain rainint= 0% outdew= 0% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter11942824358221873617120:17:42
In per 0.24 liter4609363 19:54:02

Estimated combined 0.3+0.5um particles weight as of 09-15-2025 20:17:42 is 44 ug/m3
Estimated PM2.5 Air Quality Index is 282 Very Unhealthy , TSP is 797 on Alert

120 Dome Floor Air Particles 09-15-2025 19:54:02 0.3 um=4609 0.5 um=363
Outside Air Particles by APF09-15-2025_20:17:42_0.3um=17168_0.5um=1185_0.7um=516_1.0um=318_2.0um=126_3.0um=53_5.0um=25_10.0um=2_sc=3467741_fl=0.9_st=23_er=0_RH=55%_T=64.94F

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 3818 feet above MH & estimated cloud temp is 31 F