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St. Helena Weather Records

St. Helena, California weather data and records from 1907–2022 based on data compiled by the NOAA.
All data displayed in U.S. customary units.
All data displayed in metric units.
All-Time Recorded High
The highest temperature ever recorded in St. Helena, California was 115.0 °F46.1 °C which occurred on July 14, 1972.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in St. Helena, California was 10.9 °F-11.7 °C which occurred on December 11, 1932.
Lowest Temperatures: All-Time By Year
St. Helena Weather by Month
Averages based on the years 1991–2020
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
☀️ Average high (°F°C) 59.215.1 62.917.1 67.119.5 72.122.3 78.525.8 85.329.6 89.031.7 88.631.4 86.530.3 78.225.7 65.818.8 58.114.5 74.523.6
🌙 Average low (°F°C) 39.74.3 41.35.2 43.56.4 46.07.8 50.210.1 53.712.1 55.613.1 55.312.9 53.111.7 48.89.3 43.56.4 39.13.9 47.78.7
☀️ Record high (°F°C) 82.928.3 86.030.0 95.035.0 98.136.7 107.141.7 109.943.3 115.046.1 111.944.4 113.045.0 104.040.0 93.033.9 82.928.3 115.046.1
🌙 Record low (°F°C) 16.0-8.9 18.0-7.8 24.1-4.4 27.0-2.8 30.9-0.6 36.02.2 37.02.8 37.93.3 33.10.6 21.9-5.6 12.9-10.6 10.9-11.7 10.9-11.7
💧 Average precipitation (inchescm) 6.115.6 6.717.0 4.812.3 1.94.9 1.22.9 0.20.5 0.00.0 0.00.1 0.10.2 1.74.3 3.38.4 8.120.6 32.682.9
💧 Daily % chance precipitation 41.0 36.2 32.3 18.6 11.1 3.1 0.6 0.5 1.7 10.8 28.0 42.3 18.3
❄️ Average snow (inchescm) 0.00.0 0.00.0 0.00.0 0.00.0 0.00.0 0.00.0 0.00.0 0.00.0 0.00.0 0.00.0 0.00.0 0.00.0 0.00.0
More St. Helena Weather Records
1907–2022
Highest daily low 78.1 °F25.6 °C June 24, 1976
Lowest daily high 34.0 °F1.1 °C December 11, 1932
Most daily precipitation 9.9 inches25.2 cm October 24, 2021
Most monthly precipitation 27.6 inches70.2 cm January 1909
Most yearly precipitation 75.4 inches191.6 cm 1983
Earliest freeze October 2 2019
Latest freeze May 27 1918
Earliest snow December 25 1948
Latest snow March 2 1976
Most daily snow 4.0 inches10.2 cm March 2, 1976
Most monthly snow 7.0 inches17.8 cm January 1916
Most yearly snow 7.0 inches17.8 cm 1916
St. Helena Weather Streaks
Most consecutive days...
With precipitation 26 days Nov 3–28, 2017
Without precipitation 160 days May 31 – Nov 6, 2002
High temperature ≥ 80 °F27 °C 113 days Jun 8 – Sep 28, 1926
High temperature ≥ 90 °F32 °C 20 days Jul 7–26, 2018
High temperature ≥ 100 °F38 °C 7 days Aug 22–28, 1931
St. Helena Weather by Year
More
Weather Station Details
Years Station Coordinates
1907–2022 Saint Helena location