Average Weather in October in Lake Arrowhead California, United States
Daily high temperatures decrease by 11°F, from 75°F to 65°F, rarely falling below 54°F or exceeding 84°F.
Daily low temperatures decrease by 9°F, from 48°F to 39°F, rarely falling below 31°F or exceeding 55°F.
For reference, on July 27, the hottest day of the year, temperatures in Lake Arrowhead typically range from 57°F to 85°F, while on December 25, the coldest day of the year, they range from 28°F to 49°F.
Average High and Low Temperature in October
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on October. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature in October
The month of October in Lake Arrowhead experiences increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 13% to 25%.
The clearest day of the month is October 1, with clear, mostly clear, or partly cloudy conditions 87% of the time.
For reference, on February 21, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 46%, while on September 7, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 90%.
Cloud Cover Categories in October
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Lake Arrowhead, the chance of a wet day over the course of October is gradually increasing, starting the month at 3% and ending it at 6%.
For reference, the year's highest daily chance of a wet day is 18% on February 21, and its lowest chance is 1% on June 15.
Probability of Precipitation in October
The average sliding 31-day rainfall during October in Lake Arrowhead is essentially constant, remaining about 0.3 inches throughout, and rarely exceeding 1.1 inches.
Average Monthly Rainfall in October
Over the course of October in Lake Arrowhead, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 1 minute, implying an average daily decrease of 2 minutes, 2 seconds, and weekly decrease of 14 minutes, 11 seconds.
The shortest day of the month is October 31, with 10 hours, 49 minutes of daylight and the longest day is October 1, with 11 hours, 49 minutes of daylight.
Hours of Daylight and Twilight in October
The earliest sunrise of the month in Lake Arrowhead is 6:43 AM on October 1 and the latest sunrise is 24 minutes later at 7:07 AM on October 31.
The latest sunset is 6:32 PM on October 1 and the earliest sunset is 36 minutes earlier at 5:56 PM on October 31.
Daylight saving time is observed in Lake Arrowhead during 2018, but it neither starts nor ends during October, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:37 AM and sets 14 hours, 27 minutes later, at 8:03 PM, while on December 21, the shortest day of the year, it rises at 6:50 AM and sets 9 hours, 52 minutes later, at 4:42 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in October
The chance that a given day will be muggy in Lake Arrowhead is essentially constant during October, remaining around 0% throughout.
For reference, on August 22, the muggiest day of the year, there are muggy conditions 0% of the time, while on September 22, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in October
The average hourly wind speed in Lake Arrowhead is essentially constant during October, remaining within 0.2 miles per hour of 6.2 miles per hour throughout.
For reference, on April 26, the windiest day of the year, the daily average wind speed is 7.9 miles per hour, while on September 9, the calmest day of the year, the daily average wind speed is 5.8 miles per hour.
Average Wind Speed in October
Wind Direction in October
Lake Arrowhead is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average surface water temperature in Lake Arrowhead is gradually decreasing during October, falling by 2°F, from 68°F to 65°F, over the course of the month.
Average Water Temperature in October
The growing season in Lake Arrowhead typically lasts for 6.5 months (199 days), from around April 18 to around November 3, rarely starting before March 22 or after May 11, and rarely ending before October 17 or after November 20.
The month of October in Lake Arrowhead is more likely than not fully within the growing season, with the chance that a given day is in the growing season rapidly decreasing from 100% to 59% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in October
The average accumulated growing degree days in Lake Arrowhead are increasing during October, increasing by 232°F, from 2,673°F to 2,905°F, over the course of the month.
Growing Degree Days in October
The average daily incident shortwave solar energy in Lake Arrowhead is decreasing during October, falling by 1.5 kWh, from 5.9 kWh to 4.4 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in October
For the purposes of this report, the geographical coordinates of Lake Arrowhead are 34.248 deg latitude, -117.189 deg longitude, and 5,207 ft elevation.
The topography within 2 miles of Lake Arrowhead contains very significant variations in elevation, with a maximum elevation change of 1,896 feet and an average elevation above sea level of 5,314 feet. Within 10 miles contains very significant variations in elevation (7,244 feet). Within 50 miles also contains extreme variations in elevation (11,394 feet).
The area within 2 miles of Lake Arrowhead is covered by trees (66%) and shrubs (33%), within 10 miles by shrubs (68%) and trees (19%), and within 50 miles by shrubs (77%).
This report illustrates the typical weather in Lake Arrowhead year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Lake Arrowhead.
For each station, the records are corrected for the elevation difference between that station and Lake Arrowhead according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Lake Arrowhead is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Lake Arrowhead and a given station.
The stations contributing to this reconstruction are: San Bernardino International Airport (27%, 18 kilometers, south); Southern California Logistics Airport (50%, 41 kilometers, northwest); and Twenty-Nine Palms, Marine Corps Air-Ground Combat Center (24%, 94 kilometers, east).
Time zones for aiports and weather stations are provided by AskGeo.com .