Mt Hamilton Weather
LO FriendsDavisCopDavis120VaisaAPFDavis40DavisCroAverage
Temp Out72.772.9 71.372.772.4 F
Dew Temp4.722.4 2825.320.09 F
Humidity715 201714.75 %
Wind Speed171411.98811.8 mph
Wind Dir205249194.0360228Az=231
Pressure25.6925.74 25.6725.84--25.55 inHg
Precip 0 0 No Precip
Time PST04:03:4504:03:46M5 OUT04:03:4904:03:4404:04:01
KAIT inch Rain & Dew 08-12-2026 04:04:01 No Rain rainint= 1% outdew= 1% indew= 0%
120 inch Rain & Dew 08-12-2026 04:04:01 No Rain rainint= 0% outdew= 1% indew= 0%
40 inch Rain & Dew 08-12-2026 04:03:45 No Rain rainint= 0% outdew= 0% indew= 0%
Crossley Rain & Dew 08-12-2026 04:04:00 No Rain rainint= 0% outdew= 0% indew= 0%
Particles um0.30.50.71.02.03.05.010.0Time
Out per 0.24 liter ------
In per 0.24 liter21469967 ------

Estimated combined 0.3+0.5um particles weight as of 08-12-2026 09:21:47 is 9 ug/m3
Estimated PM2.5 Air Quality Index is 130 Unhealthy for Sensitive Groups , TSP is 304 Above Primary Standard

120 Dome Floor Air Particles 07-26-2026 19:41:57 0.3 um=21469 0.5 um=967
Outside Air Particles by APF

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 11477 feet above MH & estimated cloud temp is -41 F