Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out53.452.949.6452.153.852.36 F
Dew Temp-9.512.810.5717.114.69.11 F
Humidity72020252118.6 %
Wind Speed13115.4121010.3 mph
Wind Dir321341338.0355296Az=330
Pressure25.6925.7125.7425.6726+0.19 inHg
Precip 00 0 No Precip
Time PST20:55:2320:55:2520:55:2520:55:2520:55:2420:55:25
KAIT inch Rain & Dew 01-22-2026 20:55:23 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 01-22-2026 20:55:25 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 01-22-2026 20:55:25 No Rain rainint= 1% outdew= 0% indew= 0%
Crossley Rain & Dew 01-22-2026 20:55:24 No Rain rainint= 0% outdew= 0% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter542612613400020:45:39
In per 0.24 liter36344 20:45:42

Estimated combined 0.3+0.5um particles weight as of 01-22-2026 20:45:39 is 1 ug/m3
Estimated PM2.5 Air Quality Index is 13 Good , TSP is 15 Normal

120 Dome Floor Air Particles 01-22-2026 20:45:42 0.3 um=363 0.5 um=44
Outside Air Particles by APF01-22-2026_20:45:39_0.3um=866_0.5um=98_0.7um=43_1.0um=21_2.0um=7_3.0um=1_5.0um=0_10.0um=0_sc=14613035_fl=1.0_st=23_er=0_RH=24%_T=48.38F

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 9113 feet above MH & estimated cloud temp is -37 F