Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out464849.4649.651.448.89 F
Dew Temp23.430.229.1232.132.829.52 F
Humidity415045514947.2 %
Wind Speed101113.691010.7 mph
Wind Dir175186178.0360113Az=159
Pressure25.925.9325.9525.8826.27+0.4 inHg
Precip 00 0 No Precip
Time PST13:06:1713:06:1613:06:2013:06:1613:06:2013:06:13
KAIT inch Rain & Dew 01-27-2026 13:06:17 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 01-27-2026 13:06:19 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 01-27-2026 13:06:16 No Rain rainint= 1% outdew= 0% indew= 0%
Crossley Rain & Dew 01-27-2026 13:06:17 No Rain rainint= 0% outdew= 0% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter320840421714363142013:01:17
In per 0.24 liter1595199 12:52:37

Estimated combined 0.3+0.5um particles weight as of 01-27-2026 13:01:17 is 14 ug/m3
Estimated PM2.5 Air Quality Index is 204 Very Unhealthy , TSP is 306 Above Primary Standard

120 Dome Floor Air Particles 01-27-2026 12:52:37 0.3 um=1595 0.5 um=199
Outside Air Particles by APF01-27-2026_13:01:17_0.3um=4612_0.5um=582_0.7um=312_1.0um=206_2.0um=91_3.0um=21_5.0um=3_10.0um=0_sc=15017099_fl=0.9_st=23_er=0_RH=40%_T=53.06F

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 4045 feet above MH & estimated cloud temp is 8 F