Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out37.539.538.4838.339.138.57 F
Dew Temp35.838.93238.338.236.64 F
Humidity949897.241009797.24 %
Wind Speed14217.411211.1 mph
Wind Dir294266185.0254240Az=249
Pressure25.6125.6625.6925.6126.04+0.14 inHg
Precip 00 0 Dew?
Time PST16:55:1616:55:1716:55:1716:55:1316:55:1616:55:17
KAIT inch Rain & Dew 04-21-2026 16:55:16 Raining! rainint= 2% outdew= 87% indew= 0%
120 inch Rain & Dew 04-21-2026 16:55:17 No Rain rainint= 0% outdew= 89% indew= 0%
40 inch Rain & Dew 04-21-2026 16:55:13 Raining! rainint= 2% outdew= 92% indew= 0%
Crossley Rain & Dew 04-21-2026 16:55:16 No Rain rainint= 1% outdew= 91% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter14548841483978381830178947152423416:54:55
In per 0.24 liter11430 16:33:49

Estimated combined 0.3+0.5um particles weight as of 04-21-2026 16:54:55 is 153 ug/m3
Estimated PM2.5 Air Quality Index is 26978 Hazardous , TSP is 598803 Urgent

120 Dome Floor Air Particles 04-21-2026 16:33:49 0.3 um=114 0.5 um=30
Outside Air Particles by APF04-21-2026_16:54:55_0.3um=6971_0.5um=4032_0.7um=4024_1.0um=4016_2.0um=3978_3.0um=3783_5.0um=3427_10.0um=2029_sc=22287422_fl=0.3_st=23_er=0_RH=100%_T=41.18F

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 136 feet above MH & estimated cloud temp is 38 F