Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out5556.252.8854.655.754.87 F
Dew Temp-11.32.14.091311.43.85 F
Humidity61114191713.4 %
Wind Speed9106.011109.2 mph
Wind Dir294324342.0334288Az=316
Pressure25.8125.8325.8525.7826.08+0.3 inHg
Precip 00 0 No Precip
Time PST04:21:1404:21:1704:21:1604:21:1604:21:1604:21:15
KAIT inch Rain & Dew 11-28-2025 04:21:14 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 11-28-2025 04:21:16 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 11-28-2025 04:21:16 No Rain rainint= 1% outdew= 0% indew= 0%
Crossley Rain & Dew 11-28-2025 04:21:16 No Rain rainint= 0% outdew= 0% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter36840158200004:19:15
In per 0.24 liter571102 04:01:17

Estimated combined 0.3+0.5um particles weight as of 11-28-2025 04:19:15 is 1 ug/m3
Estimated PM2.5 Air Quality Index is 6 Good , TSP is 7 Normal

120 Dome Floor Air Particles 11-28-2025 04:01:17 0.3 um=571 0.5 um=102
Outside Air Particles by APF11-28-2025_04:19:15_0.3um=589_0.5um=64_0.7um=24_1.0um=14_2.0um=4_3.0um=1_5.0um=1_10.0um=0_sc=9802711_fl=1.0_st=23_er=0_RH=16%_T=52.7F

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 12295 feet above MH & estimated cloud temp is -65 F