Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out60.661.860.863.362.561.8 F
Dew Temp25.334.331.2836.335.632.55 F
Humidity263633373733.79 %
Wind Speed743.6303.5 mph
Wind Dir177183168.0171180Az=176
Pressure25.8425.8725.8925.8126.11+0.34 inHg
Precip 00 0 No Precip
Time PST12:21:1612:21:1812:21:1712:21:1712:21:1612:21:16
KAIT inch Rain & Dew 01-20-2026 12:21:16 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 01-20-2026 12:21:15 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 01-20-2026 12:21:17 No Rain rainint= 0% outdew= 0% indew= 0%
Crossley Rain & Dew 01-20-2026 12:21:16 No Rain rainint= 0% outdew= 0% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter157812848261131012:18:21
In per 0.24 liter40843 11:57:00

Estimated combined 0.3+0.5um particles weight as of 01-20-2026 12:18:21 is 5 ug/m3
Estimated PM2.5 Air Quality Index is 35 Good , TSP is 64 Normal

120 Dome Floor Air Particles 01-20-2026 11:57:00 0.3 um=408 0.5 um=43
Outside Air Particles by APF01-20-2026_12:18:21_0.3um=2521_0.5um=205_0.7um=77_1.0um=42_2.0um=19_3.0um=5_5.0um=2_10.0um=0_sc=14409834_fl=1.0_st=23_er=0_RH=27%_T=67.82F

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 6249 feet above MH & estimated cloud temp is 0 F