Average Weather in September in Port Hueneme California, United States
The highest daily average high temperature is 72°F on September 9.
Daily low temperatures are around 59°F, rarely falling below 53°F or exceeding 64°F.
For reference, on September 9, the hottest day of the year, temperatures in Port Hueneme typically range from 60°F to 72°F, while on December 25, the coldest day of the year, they range from 48°F to 64°F.
Average High and Low Temperature in September
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on September. 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 September
La Serena, Chile (5,424 miles away); Cilaos, Réunion (11,493 miles); and Albany, Australia (9,246 miles) are the far-away foreign places with temperatures most similar to Port Hueneme (view comparison).
The month of September in Port Hueneme experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 11% throughout the month.
The clearest day of the month is September 7, with clear, mostly clear, or partly cloudy conditions 91% of the time.
For reference, on February 20, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 42%, while on August 23, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 92%.
Cloud Cover Categories in September
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Port Hueneme, the chance of a wet day over the course of September is gradually increasing, starting the month at 1% and ending it at 3%.
For reference, the year's highest daily chance of a wet day is 22% on February 20, and its lowest chance is 0% on July 30.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Port Hueneme is gradually increasing, starting the month at 0.1 inches, when it rarely exceeds 0.2 inches or falls below -0.0 inches, and ending the month at 0.3 inches, when it rarely exceeds 1.0 inches or falls below -0.0 inches.
Average Monthly Rainfall in September
Over the course of September in Port Hueneme, 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, 6 seconds, and weekly decrease of 14 minutes, 40 seconds.
The shortest day of the month is September 30, with 11 hours, 51 minutes of daylight and the longest day is September 1, with 12 hours, 52 minutes of daylight.
Hours of Daylight and Twilight in September
The earliest sunrise of the month in Port Hueneme is 6:30 AM on September 1 and the latest sunrise is 20 minutes later at 6:50 AM on September 30.
The latest sunset is 7:22 PM on September 1 and the earliest sunset is 40 minutes earlier at 6:41 PM on September 30.
Daylight saving time is observed in Port Hueneme during 2017, but it neither starts nor ends during September, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:45 AM and sets 14 hours, 26 minutes later, at 8:11 PM, while on December 21, the shortest day of the year, it rises at 6:58 AM and sets 9 hours, 53 minutes later, at 4:51 PM.
Sunrise & Sunset with Twilight in September
The chance that a given day will be muggy in Port Hueneme is gradually decreasing during September, falling from 5% to 3% over the course of the month.
The highest chance of a muggy day during September is 6% on September 11.
For reference, on September 11, the muggiest day of the year, there are muggy conditions 6% of the time, while on November 21, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in September
The average hourly wind speed in Port Hueneme is gradually increasing during September, increasing from 5.3 miles per hour to 6.0 miles per hour over the course of the month.
For reference, on December 29, the windiest day of the year, the daily average wind speed is 8.6 miles per hour, while on August 9, the calmest day of the year, the daily average wind speed is 5.0 miles per hour.
Average Wind Speed in September
Wind Direction in September
Port Hueneme 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 Port Hueneme is essentially constant during September, remaining around 66°F throughout.
Average Water Temperature in September
Temperatures in Port Hueneme are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Time Spent in Various Temperature Bands and the Growing Season in September
The average accumulated growing degree days in Port Hueneme are increasing during September, increasing by 436°F, from 2,414°F to 2,849°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Port Hueneme is decreasing during September, falling by 1.3 kWh, from 7.0 kWh to 5.8 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in September
For the purposes of this report, the geographical coordinates of Port Hueneme are 34.148 deg latitude, -119.195 deg longitude, and 7 ft elevation.
The topography within 2 miles of Port Hueneme is essentially flat, with a maximum elevation change of 30 feet and an average elevation above sea level of 9 feet. Within 10 miles is essentially flat (1,539 feet). Within 50 miles contains very significant variations in elevation (8,819 feet).
The area within 2 miles of Port Hueneme is covered by artificial surfaces (55%) and water (35%), within 10 miles by water (55%) and artificial surfaces (19%), and within 50 miles by water (53%) and shrubs (28%).
This report illustrates the typical weather in Port Hueneme 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 Port Hueneme.
For each station, the records are corrected for the elevation difference between that station and Port Hueneme 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 Port Hueneme is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Port Hueneme and a given station.
The stations contributing to this reconstruction are: Oxnard Airport (50%, 6 kilometers, north); Point Mugu, Naval Air Warfare Center (34%, 8 kilometers, southeast); and Camarillo Airport (16%, 13 kilometers, northeast).
Time zones for aiports and weather stations are provided by AskGeo.com .