Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out61.562.1 60.861.461.45 F
Dew Temp35.441 43.14240.37 F
Humidity3846 524946.25 %
Wind Speed15158.314511.5 mph
Wind Dir298345334.0319301Az=319
Pressure25.6125.67 25.5925.82--25.55 inHg
Precip 0 0 No Precip
Time PST00:04:4200:04:41M5 OUT00:04:4700:04:4200:04:58
KAIT inch Rain & Dew 07-01-2026 00:04:54 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 07-01-2026 00:04:57 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 07-01-2026 00:04:43 No Rain rainint= 0% outdew= 0% indew= 0%
Crossley Rain & Dew 07-01-2026 00:04:58 No Rain rainint= 0% outdew= 0% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter ------
In per 0.24 liter2796768 ------

Estimated combined 0.3+0.5um particles weight as of 07-01-2026 10:42:04 is 29 ug/m3
Estimated PM2.5 Air Quality Index is 292 Very Unhealthy , TSP is 452 on Attention

120 Dome Floor Air Particles 06-30-2026 23:55:20 0.3 um=2796 0.5 um=768
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 4795 feet above MH & estimated cloud temp is 14 F