Saint Helena, California

ID: USC00047643 Latitude: 38.5067 Longitude: -122.4714

Elevation: 225.1 feet ( 68.6 meters)

Source: NOAA Climate Normals 1991-2020

SAINT HELENA, CA US, STATE_NAME Temperature Chart Daily average maximum and minimum temperatures for SAINT HELENA, CA US, STATE_NAME Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High & Low Temperature °F °C -30 -34.4 -20 -28.9 -10 -23.3 0 -17.8 10 -12.2 20 -6.7 30 -1.1 40 4.4 50 10.0 60 15.6 70 21.1 80 26.7 90 32.2 100 37.8 110 43.3
SAINT HELENA, CA US, California Precipitation Chart Precipitation chart for SAINT HELENA, CA US, California Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Precipitation In. Cm. 0.00 0.00 0.10 0.25 0.20 0.51 0.30 0.76 0.40 1.02 0.50 1.27 0.60 1.52 0.70 1.78 0.80 2.03 0.90 2.29 1.00 2.54 Precipitation Total: 33.97 in., 13.37 cm.
Daylight Chart for Saint Helena Daylight chart for Saint Helena. Latitude 38.5. Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Sunrise/Sunset Daylight NOON NOON 0 0 2 2 4 4 6 6 8 8 10 10 12 12 14 2 16 4 18 6 20 8 22 10 24 12

Monthly Data Table for Saint Helena, California

Monthly Data from NOAA Monthly Normals 2006-2020

Imperial Units
Statistic Units Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum Temperature °F 60.3 63.7 66.8 72.7 78.5 86.7 89.1 88.7 87.2 78.4 66.8 59.0
Minimum Temperature °F 40.3 41.9 43.7 46.9 50.8 54.4 56.3 56.2 54.4 50.0 43.9 39.7
Heating Degree Days °F 455.8 342.4 304.3 176.7 76.4 12.1 0.8 0.5 8.0 83.7 293.6 484.9
Cooling Degree Days °F 0.1 0.8 2.1 20.7 65.7 178.4 239.5 231.4 181.8 58.9 4.1 0.0
Precipitation I 5.1 5.8 5.0 2.0 1.0 0.3 0.0 0.0 0.1 1.6 2.5 5.4

Metric Units
Statistic Units Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum Temperature °C 15.7 17.6 19.3 22.6 25.8 30.4 31.7 31.5 30.7 25.8 19.3 15.0
Minimum Temperature °C 4.6 5.5 6.5 8.3 10.4 12.4 13.5 13.4 12.4 10.0 6.6 4.3
Heating Degree Days °C 235.4 172.4 151.3 80.4 24.7 -11.1 -17.3 -17.5 -13.3 28.7 145.3 251.6
Cooling Degree Days °C -17.7 -17.3 -16.6 -6.3 18.7 81.3 115.3 110.8 83.2 14.9 -15.5 -17.8
Precipitation M 12.9 14.8 12.6 5.2 2.5 0.9 0.0 0.0 0.2 4.1 6.3 13.8
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