Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out60.6 60.2660.562.160.86 F
Dew Temp-1.4 12.222.319.213.07 F
Humidity8 15231916.25 %
Wind Speed19 15.24811.6 mph
Wind Dir150 178.0156136Az=155
Pressure25.8825.9125.9425.8626.14+0.39 inHg
Precip 00 0 No Precip
Time PST22:05:1322:05:1322:05:1222:05:1022:05:1022:05:13
KAIT inch Rain & Dew 02-04-2026 22:05:10 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 02-04-2026 22:05:13 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 02-04-2026 22:05:10 No Rain rainint= 0% outdew= 0% indew= 0%
Crossley Rain & Dew 02-04-2026 22:05:13 No Rain rainint= 0% outdew= 1% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter301748326217966131022:00:28
In per 0.24 liter2920414 21:58:52

Estimated combined 0.3+0.5um particles weight as of 02-04-2026 22:00:28 is 14 ug/m3
Estimated PM2.5 Air Quality Index is 214 Very Unhealthy , TSP is 306 Above Primary Standard

120 Dome Floor Air Particles 02-04-2026 21:58:52 0.3 um=2920 0.5 um=414
Outside Air Particles by APF02-04-2026_22:00:28_0.3um=4819_0.5um=773_0.7um=420_1.0um=286_2.0um=107_3.0um=21_5.0um=3_10.0um=0_sc=15740526_fl=1.0_st=23_er=0_RH=19%_T=59.54F

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 10340 feet above MH & estimated cloud temp is -40 F