Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out52.153.649.64 53.952.31 F
Dew Temp-7.88.47.34 8.64.13 F
Humidity81618 1614.5 %
Wind Speed18215.4 913.3 mph
Wind Dir56349.0 344Az=356
Pressure25.925.9325.9525.8826.23+0.4 inHg
Precip 00 0 No Precip
Time PST21:50:1121:50:1221:50:1321:50:1021:50:1321:50:13
KAIT inch Rain & Dew 12-29-2025 21:50:08 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 12-29-2025 21:50:12 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 12-29-2025 21:50:10 No Rain rainint= 1% outdew= 0% indew= 0%
Crossley Rain & Dew 12-29-2025 21:50:13 No Rain rainint= 0% outdew= 0% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter2882585000021:40:25
In per 0.24 liter16822 21:40:49

Estimated combined 0.3+0.5um particles weight as of 12-29-2025 21:40:25 is 0 ug/m3
Estimated PM2.5 Air Quality Index is 0 Good , TSP is 0 Normal

120 Dome Floor Air Particles 12-29-2025 21:40:49 0.3 um=168 0.5 um=22
Outside Air Particles by APF12-29-2025_21:40:25_0.3um=461_0.5um=41_0.7um=14_1.0um=9_2.0um=0_3.0um=0_5.0um=0_10.0um=0_sc=12543085_fl=1.0_st=23_er=0_RH=21%_T=48.74F

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 10272 feet above MH & estimated cloud temp is -48 F