Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out63.764.962.7862.864.163.65 F
Dew Temp0.920.321.7419.815.415.62 F
Humidity81821191516.2 %
Wind Speed853.6575.7 mph
Wind Dir239248254.0222242Az=241
Pressure25.7125.7525.7725.6925.94+0.22 inHg
Precip 00 0 No Precip
Time PST03:59:1103:59:0803:59:1403:59:1203:59:1003:59:23
KAIT inch Rain & Dew 03-22-2026 03:59:17 No Rain rainint= 3% outdew= 1% indew= 0%
120 inch Rain & Dew 03-22-2026 03:59:17 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 03-22-2026 03:59:12 No Rain rainint= 0% outdew= 0% indew= 0%
Crossley Rain & Dew 03-22-2026 03:59:19 No Rain rainint= 0% outdew= 26% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter10463292001273430003:50:45
In per 0.24 liter422122 03:32:26

Estimated combined 0.3+0.5um particles weight as of 03-22-2026 03:50:45 is 7 ug/m3
Estimated PM2.5 Air Quality Index is 110 Unhealthy for Sensitive Groups , TSP is 145 Normal

120 Dome Floor Air Particles 03-22-2026 03:32:26 0.3 um=422 0.5 um=122
Outside Air Particles by APF03-22-2026_03:50:45_0.3um=1505_0.5um=473_0.7um=288_1.0um=183_2.0um=50_3.0um=5_5.0um=0_10.0um=0_sc=19648846_fl=0.9_st=23_er=0_RH=25%_T=61.52F

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 10136 feet above MH & estimated cloud temp is -35 F