Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out4142.843.1642.643.942.69 F
Dew Temp38.840.842.6242.341.641.22 F
Humidity929398999294.8 %
Wind Speed11111.6446.3 mph
Wind Dir247331240.0266231Az=260
Pressure25.6825.7425.7625.6926.13+0.21 inHg
Precip 00 0 Dew?
Time PST17:48:4917:48:4817:48:4917:48:4617:48:4717:48:50
KAIT inch Rain & Dew 04-27-2026 17:48:49 No Rain rainint= 3% outdew= 1% indew= 0%
120 inch Rain & Dew 04-27-2026 17:48:48 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 04-27-2026 17:48:46 No Rain rainint= 4% outdew= 2% indew= 0%
Crossley Rain & Dew 04-27-2026 17:48:47 No Rain rainint= 0% outdew= 2% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter16873292518161068263276017:45:11
In per 0.24 liter5014778 17:21:30

Estimated combined 0.3+0.5um particles weight as of 04-27-2026 17:45:11 is 87 ug/m3
Estimated PM2.5 Air Quality Index is 854 Hazardous , TSP is 1277 Urgent

120 Dome Floor Air Particles 04-27-2026 17:21:30 0.3 um=5014 0.5 um=778
Outside Air Particles by APF04-27-2026_17:45:11_0.3um=24255_0.5um=4206_0.7um=2611_1.0um=1536_2.0um=379_3.0um=40_5.0um=10_10.0um=1_sc=22808748_fl=0.9_st=23_er=0_RH=85%_T=47.12F

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 454 feet above MH & estimated cloud temp is 38 F