Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out68.267.471.7868.365.368.19 F
Dew Temp27.839.336.1441.540.837.1 F
Humidity223627384132.79 %
Wind Speed021.6010.9 mph
Wind Dir24925077.019682Az=188
Pressure25.7925.8325.8525.7726.03+0.3 inHg
Precip 00 0 No Precip
Time PST11:05:4711:05:4611:05:4711:05:4711:05:4611:05:45
KAIT inch Rain & Dew 03-28-2026 11:05:47 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 03-28-2026 11:05:46 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 03-28-2026 11:05:47 No Rain rainint= 0% outdew= 0% indew= 0%
Crossley Rain & Dew 03-28-2026 11:05:46 No Rain rainint= 0% outdew= 33% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter274049824214540103010:59:45
In per 0.24 liter1574204 10:52:16

Estimated combined 0.3+0.5um particles weight as of 03-28-2026 10:59:45 is 13 ug/m3
Estimated PM2.5 Air Quality Index is 130 Unhealthy for Sensitive Groups , TSP is 234 Above Secondary Standard

120 Dome Floor Air Particles 03-28-2026 10:52:16 0.3 um=1574 0.5 um=204
Outside Air Particles by APF03-28-2026_10:59:45_0.3um=4377_0.5um=797_0.7um=387_1.0um=233_2.0um=64_3.0um=17_5.0um=5_10.0um=0_sc=20192888_fl=1.0_st=23_er=0_RH=22%_T=82.04F

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 6386 feet above MH & estimated cloud temp is 4 F