St. Helena July Weather

Averages and records for weather in St. Helena, California in the month of July.
Typical St. Helena July Weather
1991–2020
Average daily high 89.0 °F
Average daily low 55.6 °F
Average monthly precipitation 0.0 inches
Average monthly snow none
Daily chance of precipitation 0.58%
Daily chance of snow 0%
St. Helena July Weather Records
1907–2023
Highest temperature 115 °F July 14, 1972
Lowest temperature 37 °F July 16, 1930
Highest daily low 76 °F July 9, 1985
Lowest daily high 64 °F July 8, 1974
Hottest average high temperature 95.3 °F 1925
Coldest average high temperature 84.6 °F 1930
Most daily precipitation 1.0 inches July 8, 1974
Most monthly precipitation 1.1 inches 1974
Most daily snow none -
Most monthly snow none -
Note: Daily averages are a moving average which includes 14 days before and after
Day Average (°F) Record (°F)
High Low High Low
July 1 88.3 55.0 107 38
July 2 88.3 55.0 109 41
July 3 88.4 55.1 109 38
July 4 88.5 55.2 114 38
July 5 88.5 55.2 107 39
July 6 88.5 55.3 112 41
July 7 88.5 55.4 111 40
July 8 88.6 55.4 110 41
July 9 88.6 55.5 109 40
July 10 88.7 55.6 112 42
July 11 88.8 55.6 115 41
July 12 88.9 55.6 107 41
July 13 89.0 55.6 115 39
July 14 89.0 55.6 115 43
July 15 89.0 55.6 109 44
July 16 89.0 55.6 107 37
July 17 89.0 55.6 108 40
July 18 89.1 55.7 109 42
July 19 89.1 55.7 107 43
July 20 89.2 55.7 106 43
July 21 89.2 55.7 108 43
July 22 89.1 55.8 108 40
July 23 89.0 55.8 107 40
July 24 88.9 55.8 106 40
July 25 88.9 55.8 110 40
July 26 89.0 55.8 107 42
July 27 89.0 55.8 110 42
July 28 89.0 55.8 109 42
July 29 89.0 55.8 109 42
July 30 89.0 55.7 109 40
July 31 89.1 55.7 106 40
Weather Station Details
Years Station Coordinates
1907–2023 Saint Helena location