Contents
- Weather in October
- Frequently asked questions
- Average temperature in October
- Average pressure in October
- Average wind speed in October
- Average humidity in October
- Average rainfall in October
- Average rainfall days in October
- Average snowfall in October
- Average snowfall days in October
- Average daylight in October
- Average sunshine in October
- Average sunshine days in October
- Average UV index in October
- Average cloud cover in October
- Average visibility in October
Weather in October
Temperature
The arrival of October corresponds with a temperature reduction, down from September's warm 85.3°F (29.6°C) to a still moderately hot 75°F (23.9°C). Saint Helena experiences a substantial decline from the daytime high temperatures in October, settling on an average low of 50.9°F (10.5°C).Humidity
The average relative humidity in October is 56%.Rainfall
In October, the rain falls for 4.7 days. Throughout October, 0.94" (24mm) of precipitation is accumulated. Throughout the year, there are 76.2 rainfall days, and 16.93" (430mm) of precipitation is accumulated.Snowfall
January, February, April through December are months without snowfall.Daylight
The average length of the day in October is 11h and 11min.On the first day of October, sunrise is at 7:06 am and sunset at 6:52 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 6:10 pm PDT.
Sunshine
In Saint Helena, California, the average sunshine in October is 6.8h.UV index
The average daily maximum UV index in October is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index of 4 in October interprets into the following recommendations:
Guard yourself - Avoiding sunburn is suggested. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are October temperatures?
What is the average humidity in October?
How many days does it rain in October in Saint Helena?
When it does not snow?
How many hours of daylight does Saint Helena have in October?
When is the sunrise / sunset in October?
How many hours of sunshine does Saint Helena have in October?
What is the UV index reading in October in Saint Helena?
Average temperature in October
Saint Helena, CA
- Average high temperature in October: 75°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is December (54.5°F).
- Average low temperature in October: 50.9°F
The month with the highest average low temperature is September (54.3°F).
The coldest month (with the lowest average low temperature) is December (39.6°F).
Average pressure in October
Saint Helena, CA
- Average pressure in October: 29.98"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.91"Hg).
Average wind speed in October
Saint Helena, CA
- Average wind speed in October: 4.6mph
The windiest month (with the highest average wind speed) is May (5.8mph).
The calmest month (with the lowest average wind speed) is November (4.3mph).
Average humidity in October
Saint Helena, CA
- Average humidity in October: 56%
The month with the highest relative humidity is March (76%).
The month with the lowest relative humidity is September (53%).
Average rainfall in October
Saint Helena, CA
- Average rainfall in October: 0.94"
The wettest month (with the highest rainfall) is February (3.7").
The driest month (with the least rainfall) is July (0").
Average rainfall days in October
Saint Helena, CA
- Average rainfall days in October: 4.7 days
The month with the highest number of rainy days is March (13.5 days).
The month with the least rainy days is August (0.3 days).
Average snowfall in October
Saint Helena, CA
- Average snowfall in October: 0"
The month with the highest snowfall is March (0.04").
The months with the least snowfall are January, February, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in October
Saint Helena, CA
- Average snowfall days in October: 0 days
The month with the highest number of snowfall days is March (0.2 days).
The months with the least snowfall days are January, February, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in October /
Average sunshine in October
Saint Helena, CA
- Average daylight in October: 11h and 1min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in October: 6h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in October
Saint Helena, CA
- Average sunshine days in October: 25.8 days
The month with the most sunshine days is July (30 days).
The month with the least sunshine days is March (15.9 days).
Average UV index in October
Saint Helena, CA
- Average UV index in October: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in October
Saint Helena, CA
- Average cloud cover in October: 20
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 7).
Average visibility in October
Saint Helena, CA
- Average visibility in October: 6mi
The months with the highest visibility are February, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and March (5mi).
Saint Helena, California, USA
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