AZMET Hourly Weather Data : TUCSON : Dec 9 2025 HR AT TD RH VPD SR PPT ST4 ST20 WS WSX WVM WVD 1 41.9 35.0 76.0 0.2 0.0 0.00 53.1 58.6 2.0 5.4 1.8 70 2 41.4 34.7 77.0 0.2 0.0 0.00 52.3 58.6 1.6 3.8 1.3 83 3 39.2 34.3 82.0 0.2 0.0 0.00 51.6 58.6 1.8 3.8 1.6 83 4 38.3 33.5 82.0 0.1 0.0 0.00 51.1 58.6 1.8 3.8 1.6 85 5 37.4 32.8 84.0 0.1 0.0 0.00 50.5 58.6 1.3 4.5 1.1 86 6 35.8 32.4 87.0 0.1 0.0 0.00 50.0 58.6 1.3 4.3 1.1 80 7 35.6 32.0 87.0 0.1 0.0 0.00 49.5 58.6 1.3 3.6 0.4 91 8 35.8 32.0 85.0 0.1 4.1 0.00 49.1 58.6 1.6 4.3 1.6 87 9 42.8 33.2 69.0 0.3 16.7 0.00 48.7 58.6 2.9 5.6 2.9 73 10 54.1 33.5 46.0 0.8 30.4 0.00 48.9 58.6 0.2 3.1 0.2 96 11 62.2 32.0 32.0 1.3 41.4 0.00 50.2 58.5 0.9 3.1 0.7 124 12 66.6 30.7 26.0 1.6 47.8 0.00 52.0 58.5 2.5 7.4 2.0 270 13 69.6 29.0 22.0 1.9 49.5 0.00 54.3 58.5 4.7 7.2 4.3 266 14 73.2 29.0 19.0 2.3 45.9 0.00 56.5 58.3 3.4 6.7 3.1 282 15 75.0 29.0 18.0 2.4 37.3 0.00 58.5 58.3 6.5 12.8 6.0 296 16 73.4 29.9 20.0 2.3 24.6 0.00 59.5 58.3 6.5 10.3 6.3 294 17 70.9 31.6 23.0 2.0 10.5 0.00 59.9 58.3 5.1 8.9 5.1 294 18 64.2 33.2 31.0 1.4 0.7 0.00 59.4 58.1 1.6 5.8 1.6 293 19 57.7 34.3 42.0 1.0 0.0 0.00 58.5 58.1 0.4 2.9 0.4 60 20 52.3 35.4 52.0 0.6 0.0 0.00 57.4 58.1 1.1 3.1 0.9 70 21 48.7 35.7 60.0 0.5 0.0 0.00 56.3 58.3 1.8 3.6 1.6 73 22 47.5 35.4 63.0 0.4 0.0 0.00 55.4 58.3 2.9 4.9 2.7 77 23 48.4 34.3 58.0 0.5 0.0 0.00 54.7 58.3 2.9 5.4 2.9 92 24 46.2 33.9 62.0 0.4 0.0 0.00 54.0 58.3 1.6 4.3 1.3 98 AZMET Daily Weather Data : TUCSON : Dec 9 2025 MAX. MIN. MEAN TOTAL UNITS TEMPERATURE 76.1 34.3 52.5 DegF RELATIVE HUMIDITY 89.0 15.0 54.0 % DEWPOINT 32.8 DegF ACTUAL VAPOR PRESS. 0.6 KPas VAPOR PRESS. DEF. 0.9 KPas SOIL TEMP. 4 in 59.9 48.7 53.8 DegF SOIL TEMP. 20 in 58.6 58.1 58.5 DegF WIND SPEED 12.8 2.5 MPH WIND VECTOR MAG. 0.4 MPH WIND VECTOR DIR. 346 Degrees SOLAR RADIATION 309.0 Langleys PRECIPITATION 0.00 Inches AZMET REF. EVAPOTRANSPIRATION 0.11 Inches STD. REF. EVAPOTRANSPIRATION 0.08 Inches HEAT UNITS 86/55F 86/50F 86/45F ---------- DAY CUM DAY CUM DAY CUM SINE CURVE 6.8 5882 9.4 7318 12.4 8857 DEFINITIONS AND UNITS AT : Air Temp (DegF) ST4 : Soil Temp 4in (DegF) TD : Dewpoint (DegF) ST20 : Soil Temp 20in (DegF) RH : Rel Humidity (%) WS : Mean Wind Speed (MPH) VPD : Vapor Pressure Deficit(KPas) WSX : Max Wind Speed (MPH) SR : Solar Rad (Langleys) WVM : Wind Vector Magnitude (MPH) PPT : Precipitation (Inches) WVD : Wind Vector Direction (Degrees) DAY : Heat Units for Day ## or 999 : Missing Data CUM : Heat Units Accumulated Since Jan 1, 2025