Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out53.255.453.245455.854.32 F
Dew Temp18.12522.2826.726.123.63 F
Humidity253130353230.6 %
Wind Speed19196.3211315.7 mph
Wind Dir114337.0360348Az=356
Pressure25.8625.925.9125.8426.16+0.36 inHg
Precip 00 0 No Precip
Time PST00:34:3600:34:3800:34:3900:34:3600:34:3700:34:38
KAIT inch Rain & Dew 12-07-2025 00:34:36 No Rain rainint= 0% outdew= 0% indew= 0%
120 inch Rain & Dew 12-07-2025 00:34:38 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 12-07-2025 00:34:36 No Rain rainint= 1% outdew= 0% indew= 0%
Crossley Rain & Dew 12-07-2025 00:34:37 No Rain rainint= 0% outdew= 0% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter359532213410000:32:42
In per 0.24 liter18134 00:10:23

Estimated combined 0.3+0.5um particles weight as of 12-07-2025 00:32:42 is 1 ug/m3
Estimated PM2.5 Air Quality Index is 13 Good , TSP is 17 Normal

120 Dome Floor Air Particles 12-07-2025 00:10:23 0.3 um=181 0.5 um=34
Outside Air Particles by APF12-07-2025_00:32:42_0.3um=574_0.5um=86_0.7um=36_1.0um=22_2.0um=7_3.0um=3_5.0um=1_10.0um=0_sc=10566583_fl=1.0_st=23_er=0_RH=34%_T=52.7F

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 6909 feet above MH & estimated cloud temp is -13 F