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 3/13/26 8:31 AM
Outdoor Temperature 49.5 °F (9.7 °C)
Relative Humidity % 79 %
Outdoor Temperature Difference from 24 Hours ago -1.7 °F
Outdoor Temperature Change per Hour 3.4 °F/Hr
Dewpoint 43.4 °F
Heat Wind Humidity Index 47.7 °F

Maximum Temperature since midnight 54.8 °F at: 12:04 AM
Minimum Temperature since midnight 44.8 °F at: 7:30 AM
Provisional Mean Temperature for today 48.5 °F
Maximum Temperature in the last 24 hours 77.2 °F at: 4:06 PM yesterday
Minimum Temperature in the last 24 hours 44.8 °F at: 7:30 AM today
Maximum Temperature yesterday 77.2 °F at: 4:06 PM
Minimum Temperature yesterday 46.9 °F at: 6:30 AM
Meteorlogical Mean Temperature Yesterday 62.1 °F
True Mean Temperature Yesterday 61.3 °F

Growing degree days Yesterday 13.6 °F
Chill hours Today 0:00 hrs
Heating degree days Yesterday 2.9 °F
Maximum Temperature last 7 days 77.2 °F at: 4:06 PM yesterday
Minimum Temperature last 7 days 43.3 °F at: 3/11/26 7:41 AM
Cloudbase 1545 feet MSL
Zero °C Isotherm 4303 feet MSL
Relative Humidity Reading % 79 %
Dewpoint Reading 44.6 °F
Natural Wet Bulb temperature (estimated) 47.9 °F
Growing degree days mean temperature Yesterday 63.6 °F
Grow hours Today 2:39 hrs
Grow hours Yesterday 18:10 hrs
True Grow degree-days Today 0.23 °F degree-days
True Grow degree-days Yesterday 11.83 °F degree-days

Today is 1.7 °F cooler than yesterday at this time.

Charts updated at 3/13/26 8:30 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