Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out33.434.836.6834.135.634.91 F
Dew Temp3234.83234.135.333.64 F
Humidity951001001009998.8 %
Wind Speed8131.61026.9 mph
Wind Dir298347359.0350284Az=328
Pressure25.7725.8125.8325.7626.23+0.28 inHg
Precip 00 0 Fog?
Time PST09:35:3309:35:3509:35:3509:35:3409:35:3409:35:33
KAIT inch Rain & Dew 12-27-2025 09:35:30 Raining! rainint= 3% outdew= 89% indew= 0%
120 inch Rain & Dew 12-27-2025 09:35:35 Raining! rainint= 0% outdew= 92% indew= 0%
40 inch Rain & Dew 12-27-2025 09:35:34 No Rain rainint= 3% outdew= 66% indew= 0%
Crossley Rain & Dew 12-27-2025 09:35:34 Raining! rainint= 2% outdew= 94% indew= 1%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter117179978676470850231710209:32:13
In per 0.24 liter347 09:21:00

Estimated combined 0.3+0.5um particles weight as of 12-27-2025 09:32:13 is 13 ug/m3
Estimated PM2.5 Air Quality Index is 2301 Hazardous , TSP is 18993 Urgent

120 Dome Floor Air Particles 12-27-2025 09:21:00 0.3 um=34 0.5 um=7
Outside Air Particles by APF12-27-2025_09:32:13_0.3um=1123_0.5um=766_0.7um=754_1.0um=733_2.0um=679_3.0um=482_5.0um=304_10.0um=98_sc=12326636_fl=0.6_st=23_er=0_RH=102%_T=40.1F

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 0 feet above MH & estimated cloud temp is 34 F