Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out31.731.431.4630.9 31.36 F
Dew Temp30.131.13230.9 31.02 F
Humidity949997.66100 97.66 %
Wind Speed0185.111 8.5 mph
Wind Dir280317289.0360 Az=310
Pressure25.3525.3925.4125.34 --0.14 inHg
Precip 01 9 Snow/Ice?
Time PST15:10:1115:10:1015:10:1215:10:11M9 OUT15:10:10
KAIT inch Rain & Dew 02-17-2026 15:10:11 Raining! rainint= 49% outdew= 89% indew= 0%
120 inch Rain & Dew 02-17-2026 15:10:10 Raining! rainint= 8% outdew= 90% indew= 0%
40 inch Rain & Dew 02-17-2026 15:10:07 Raining! rainint= 23% outdew= 38% indew= 0%
Crossley Rain & Dew
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter6893203203203142762267015:02:49
In per 0.24 liter8629 15:09:22

Estimated combined 0.3+0.5um particles weight as of 02-17-2026 15:02:49 is 5 ug/m3
Estimated PM2.5 Air Quality Index is 1020 Hazardous , TSP is 12356 Urgent

120 Dome Floor Air Particles 02-17-2026 15:09:22 0.3 um=86 0.5 um=29
Outside Air Particles by APF02-17-2026_15:02:49_0.3um=551_0.5um=256_0.7um=256_1.0um=256_2.0um=251_3.0um=221_5.0um=181_10.0um=56_sc=16838466_fl=0.5_st=23_er=0_RH=103%_T=33.62F

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 68 feet above MH & estimated cloud temp is 30 F