Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out47.549.748.9248.450.148.92 F
Dew Temp20.226.124.9827.325.824.87 F
Humidity344039443939.2 %
Wind Speed886.71398.9 mph
Wind Dir188203153.0208223Az=196
Pressure25.8425.8725.8925.8226.2+0.34 inHg
Precip 00 0 No Precip
Time PST15:38:4615:38:4615:38:4815:38:4615:38:4515:38:46
KAIT inch Rain & Dew 01-25-2026 15:38:46 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 01-25-2026 15:38:42 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 01-25-2026 15:38:46 No Rain rainint= 0% outdew= 0% indew= 0%
Crossley Rain & Dew 01-25-2026 15:38:48 No Rain rainint= 0% outdew= 0% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter3973358157914581015:35:04
In per 0.24 liter1650152 15:37:43

Estimated combined 0.3+0.5um particles weight as of 01-25-2026 15:35:04 is 15 ug/m3
Estimated PM2.5 Air Quality Index is 146 Unhealthy for Sensitive Groups , TSP is 211 Above Secondary Standard

120 Dome Floor Air Particles 01-25-2026 15:37:43 0.3 um=1650 0.5 um=152
Outside Air Particles by APF01-25-2026_15:35:04_0.3um=6347_0.5um=573_0.7um=252_1.0um=146_2.0um=73_3.0um=14_5.0um=3_10.0um=0_sc=14853552_fl=1.0_st=23_er=0_RH=38%_T=51.8F

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 5363 feet above MH & estimated cloud temp is -4 F