Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out52.15453.7853.355.353.69 F
Dew Temp13.22319.5726.127.121.79 F
Humidity213026353429.2 %
Wind Speed211122.671615.5 mph
Wind Dir126183138.010078Az=124
Pressure25.8225.8525.8825.826.14+0.33 inHg
Precip 00 0 No Precip
Time PST20:48:1720:48:1820:48:1620:48:1820:48:1520:48:18
KAIT inch Rain & Dew 12-30-2025 20:48:14 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 12-30-2025 20:48:18 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 12-30-2025 20:48:18 No Rain rainint= 0% outdew= 0% indew= 0%
Crossley Rain & Dew 12-30-2025 20:48:12 No Rain rainint= 0% outdew= 0% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter101511665442651020:43:27
In per 0.24 liter44460 20:18:14

Estimated combined 0.3+0.5um particles weight as of 12-30-2025 20:43:27 is 3 ug/m3
Estimated PM2.5 Air Quality Index is 84 Moderate , TSP is 120 Normal

120 Dome Floor Air Particles 12-30-2025 20:18:14 0.3 um=444 0.5 um=60
Outside Air Particles by APF12-30-2025_20:43:27_0.3um=1622_0.5um=186_0.7um=104_1.0um=71_2.0um=42_3.0um=9_5.0um=3_10.0um=0_sc=12626057_fl=1.0_st=23_er=0_RH=28%_T=54.32F

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 7045 feet above MH & estimated cloud temp is -16 F