Location: North Willow Glen, San Jose, Ca, USA
Altitude: 125 feet, Grid 37°18.544 , 121°54.521
Arduino based Weather Station

Temperature

Last Update 12/7/25 9:03 AM
Outdoor Temperature 45.5 °F (7.5 °C)
Relative Humidity % 93 %
Outdoor Temperature Difference from 24 Hours ago -0.5 °F
Dewpoint 43.7 °F
Heat Wind Humidity Index 44.1 °F

Maximum Temperature since midnight 47.1 °F at: 2:30 AM
Minimum Temperature since midnight 45.1 °F at: 7:00 AM
Maximum Temperature in the last 24 hours 53.9 °F at: 2:55 PM yesterday
Minimum Temperature in the last 24 hours 44.2 °F at: 10:40 PM yesterday
Maximum Temperature yesterday 53.9 °F at: 2:55 PM
Minimum Temperature yesterday 42.6 °F at: 2:30 AM
Meteorlogical Mean Temperature Yesterday 48.2 °F
True Mean Temperature Yesterday 47.4 °F

Growing degree days Yesterday 1.9 °F
Chill hours Yesterday 6:36 hrs
Heating degree days Yesterday 16.8 °F
Maximum Temperature last 7 days 61.1 °F at: 12/3/25 2:35 PM
Minimum Temperature last 7 days 37.9 °F at: 12/4/25 6:30 AM
Cloudbase 557 feet MSL
Zero °C Isotherm 3693 feet MSL
Relative Humidity Reading % 93 %
Dewpoint Reading 45.0 °F
Natural Wet Bulb temperature (estimated) 46.3 °F
Growing degree days mean temperature Yesterday 51.9 °F
Grow hours Yesterday 6:08 hrs
True Grow degree-days Yesterday 0.62 °F degree-days

Today is 0.5 °F cooler than yesterday at this time.

Charts updated at 12/7/25 9:02 AM
outdoor temperature day-to-day change

outdoor temperature 24 hour timescale

outdoor temperature 7 day timescale

outdoor humidity 24 hour timescale

outdoor humidity 7 day timescale

zero isotherm 24 hour timescale

zero isotherm 7 day timescale


OpenJ2300 (c) Dennis Ernst OpenJ2300
OpenJ2300 (c) David George OpenJ2300