Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out57.658.257.3856.957.457.49 F
Dew Temp16.726.622.2827.830.424.75 F
Humidity203026333629 %
Wind Speed17145.8399.8 mph
Wind Dir213241189.0236226Az=221
Pressure25.8425.8825.925.8226.13+0.35 inHg
Precip 00 0 No Precip
Time PST20:54:5920:54:5920:54:5920:54:5820:54:5820:54:59
KAIT inch Rain & Dew 01-31-2026 20:54:55 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 01-31-2026 20:54:59 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 01-31-2026 20:54:58 No Rain rainint= 0% outdew= 0% indew= 0%
Crossley Rain & Dew 01-31-2026 20:54:58 No Rain rainint= 0% outdew= 1% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter42669325703961683813020:46:29
In per 0.24 liter2769515 20:26:42

Estimated combined 0.3+0.5um particles weight as of 01-31-2026 20:46:29 is 24 ug/m3
Estimated PM2.5 Air Quality Index is 546 Hazardous , TSP is 914 Urgent

120 Dome Floor Air Particles 01-31-2026 20:26:42 0.3 um=2769 0.5 um=515
Outside Air Particles by APF01-31-2026_20:46:29_0.3um=6815_0.5um=1489_0.7um=911_1.0um=633_2.0um=269_3.0um=61_5.0um=22_10.0um=1_sc=15390552_fl=1.0_st=23_er=0_RH=31%_T=56.3F

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 7181 feet above MH & estimated cloud temp is -13 F