Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out54.555.9 55.957.555.95 F
Dew Temp7.620.4 23.820.818.14 F
Humidity1525 292423.25 %
Wind Speed15186.312611.5 mph
Wind Dir296333329.0342279Az=316
Pressure25.825.85 25.7926.12--25.55 inHg
Precip 0 0 No Precip
Time PST09:32:0809:32:06M5 OUT09:32:1409:32:0909:32:23
KAIT inch Rain & Dew 04-07-2026 09:32:23 No Rain rainint= 3% outdew= 1% indew= 0%
120 inch Rain & Dew 04-07-2026 09:32:24 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 04-07-2026 09:32:06 No Rain rainint= 0% outdew= 0% indew= 0%
Crossley Rain & Dew 04-07-2026 09:32:24 No Rain rainint= 0% outdew= 2% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter ------
In per 0.24 liter38859 09:10:45

Estimated combined 0.3+0.5um particles weight as of 04-07-2026 13:49:56 is 47 ug/m3
Estimated PM2.5 Air Quality Index is 393 Hazardous , TSP is 701 on Alert

120 Dome Floor Air Particles 04-07-2026 09:10:45 0.3 um=388 0.5 um=59
Outside Air Particles by APF

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 8068 feet above MH & estimated cloud temp is -24 F