Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out75.777.684.927879.779.18 F
Dew Temp35.142.639.7445.545.341.64 F
Humidity232920323026.8 %
Wind Speed11114.01158.4 mph
Wind Dir287338353.0346329Az=331
Pressure25.8225.8625.8825.825.97+0.33 inHg
Precip 00 0 No Precip
Time PST09:09:3009:09:3209:09:3209:09:2909:09:3009:09:31
KAIT inch Rain & Dew 07-15-2026 09:09:30 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 07-15-2026 09:09:29 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 07-15-2026 09:09:29 No Rain rainint= 0% outdew= 0% indew= 0%
Crossley Rain & Dew 07-15-2026 09:09:33 No Rain rainint= 0% outdew= 0% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter279425198673383008:59:40
In per 0.24 liter32703169 09:04:43

Estimated combined 0.3+0.5um particles weight as of 07-15-2026 08:59:40 is 11 ug/m3
Estimated PM2.5 Air Quality Index is 107 Unhealthy for Sensitive Groups , TSP is 191 Above Secondary Standard

120 Dome Floor Air Particles 07-15-2026 09:04:43 0.3 um=32703 0.5 um=169
Outside Air Particles by APF07-15-2026_08:59:40_0.3um=4464_0.5um=401_0.7um=157_1.0um=108_2.0um=53_3.0um=14_5.0um=5_10.0um=0_sc=2822774_fl=1.0_st=23_er=0_RH=17%_T=96.26F

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 7954 feet above MH & estimated cloud temp is -1 F