Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out33.334.133.9733.234.833.87 F
Dew Temp31.733.334.3433.232.933.08 F
Humidity94971001009396.8 %
Wind Speed7923.041010.6 mph
Wind Dir3632158.0101106Az=86
Pressure25.825.8425.8625.826.26+0.31 inHg
Precip 00 0 Dew?
Time PST23:26:2223:26:2123:26:2223:26:2223:26:2123:26:22
KAIT inch Rain & Dew 02-21-2026 23:26:22 Raining! rainint= 13% outdew= 87% indew= 0%
120 inch Rain & Dew 02-21-2026 23:26:17 No Rain rainint= 3% outdew= 92% indew= 0%
40 inch Rain & Dew 02-21-2026 23:26:22 No Rain rainint= 7% outdew= 95% indew= 0%
Crossley Rain & Dew
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter547014921014698197284023:26:01
In per 0.24 liter1190414 23:13:40

Estimated combined 0.3+0.5um particles weight as of 02-21-2026 23:26:01 is 34 ug/m3
Estimated PM2.5 Air Quality Index is 640 Hazardous , TSP is 918 Urgent

120 Dome Floor Air Particles 02-21-2026 23:13:40 0.3 um=1190 0.5 um=414
Outside Air Particles by APF02-21-2026_23:26:01_0.3um=5243_0.5um=1430_0.7um=972_1.0um=669_2.0um=189_3.0um=27_5.0um=4_10.0um=0_sc=17214195_fl=0.6_st=23_er=0_RH=99%_T=35.24F

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 181 feet above MH & estimated cloud temp is 32 F