Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out66.267.164.465.767.466.16 F
Dew Temp13.724.620.1229.728.223.26 F
Humidity132018262320 %
Wind Speed13132.21389.8 mph
Wind Dir334346329.0355300Az=333
Pressure25.6925.7425.7525.6725.91+0.2 inHg
Precip 00 0 No Precip
Time PST04:50:5104:50:5104:50:5404:50:5304:50:5104:50:57
KAIT inch Rain & Dew 09-22-2026 04:50:57 No Rain rainint= 0% outdew= 1% indew= 0%
120 inch Rain & Dew 09-22-2026 04:50:54 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 09-22-2026 04:50:49 No Rain rainint= 1% outdew= 0% indew= 0%
Crossley Rain & Dew 09-22-2026 04:50:54 No Rain rainint= 0% outdew= 1% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter8818102630014666187104:49:22
In per 0.24 liter21469967 ------

Estimated combined 0.3+0.5um particles weight as of 09-22-2026 04:49:22 is 38 ug/m3
Estimated PM2.5 Air Quality Index is 214 Very Unhealthy , TSP is 527 on Attention

120 Dome Floor Air Particles 07-26-2026 19:41:57 0.3 um=21469 0.5 um=967
Outside Air Particles by APF09-22-2026_04:49:22_0.3um=12676_0.5um=1476_0.7um=432_1.0um=211_2.0um=95_3.0um=26_5.0um=11_10.0um=2_sc=1004078_fl=0.9_st=23_er=0_RH=22%_T=63.32F

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 9659 feet above MH & estimated cloud temp is -28 F