Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out 40.2839.640.640.15 F
Dew Temp 3239.639.737.1 F
Humidity 98.571009798.52 %
Wind Speed 3.1955.7 mph
Wind Dir 332.0360287Az=327
Pressure25.52 25.5925.5125.9+0.04 inHg
Precip 01 0 Fog/Driz
Time PST00:58:4400:52:5800:58:4700:58:4500:58:4600:58:46
KAIT inch Rain & Dew 11-14-2026 00:58:47 Raining! rainint= 7% outdew= 91% indew= 4%
120 inch Rain & Dew 11-14-2026 00:52:58 Raining! rainint= 0% outdew= 86% indew= 0%
40 inch Rain & Dew 11-14-2026 00:58:41 No Rain rainint= 5% outdew= 95% indew= 0%
Crossley Rain & Dew 11-14-2026 00:58:45 No Rain rainint= 1% outdew= 91% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter58621020920720519717812300:54:11
In per 0.24 liter21469967 ------

Estimated combined 0.3+0.5um particles weight as of 11-14-2026 00:54:11 is 3 ug/m3
Estimated PM2.5 Air Quality Index is 666 Hazardous , TSP is 16780 Urgent

120 Dome Floor Air Particles 07-26-2026 19:41:57 0.3 um=21469 0.5 um=967
Outside Air Particles by APF11-14-2026_00:54:11_0.3um=749_0.5um=269_0.7um=268_1.0um=265_2.0um=262_3.0um=253_5.0um=228_10.0um=158_sc=5568334_fl=0.8_st=23_er=0_RH=101%_T=42.62F

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 68 feet above MH & estimated cloud temp is 40 F