Average Weather in January in Bay Point California, United States
In Bay Point, the month of January is characterized by gradually rising daily high temperatures, with daily highs increasing by 4°F, from 55°F to 59°F over the course of the month, and rarely exceeding 66°F or dropping below 47°F.
Daily low temperatures increase by 2°F, from 40°F to 42°F, rarely falling below 31°F or exceeding 50°F.
For reference, on July 18, the hottest day of the year, temperatures in Bay Point typically range from 58°F to 89°F, while on December 31, the coldest day of the year, they range from 40°F to 55°F.
Average High and Low Temperature in January
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on January. 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 January
The month of January in Bay Point experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 57% throughout the month. The highest chance of overcast or mostly cloudy conditions is 58% on January 11.
The clearest day of the month is January 30, with clear, mostly clear, or partly cloudy conditions 45% of the time.
For reference, on January 11, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 58%, while on July 20, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 91%.
Cloud Cover in January
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Bay Point, the chance of a wet day over the course of January is essentially constant, remaining around 25% throughout.
For reference, the year's highest daily chance of a wet day is 28% on February 20, and its lowest chance is 0% on August 2.
Probability of Precipitation in January
The average sliding 31-day rainfall during January in Bay Point is essentially constant, remaining about 3.0 inches throughout, and rarely exceeding 6.6 inches or falling below 0.2 inches.
Average Monthly Rainfall in January
Over the course of January in Bay Point, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 42 minutes, implying an average daily increase of 1 minute, 24 seconds, and weekly increase of 9 minutes, 49 seconds.
The shortest day of the month is January 1, with 9 hours, 35 minutes of daylight and the longest day is January 31, with 10 hours, 17 minutes of daylight.
Hours of Daylight and Twilight in January
The latest sunrise of the month in Bay Point is 7:24 AM on January 5 and the earliest sunrise is 11 minutes earlier at 7:12 AM on January 31.
The earliest sunset is 4:59 PM on January 1 and the latest sunset is 31 minutes later at 5:30 PM on January 31.
Daylight saving time is observed in Bay Point during 2017, but it neither starts nor ends during January, so the entire month is in standard time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:45 AM and sets 14 hours, 48 minutes later, at 8:34 PM, while on December 21, the shortest day of the year, it rises at 7:20 AM and sets 9 hours, 31 minutes later, at 4:51 PM.
Sunrise & Sunset with Twilight in January
The chance that a given day will be muggy in Bay Point is essentially constant during January, remaining around 0% throughout.
For reference, on May 10, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in January
The average hourly wind speed in Bay Point is essentially constant during January, remaining within 0.1 miles per hour of 3.6 miles per hour throughout.
For reference, on July 8, the windiest day of the year, the daily average wind speed is 5.7 miles per hour, while on January 21, the calmest day of the year, the daily average wind speed is 3.6 miles per hour.
The lowest daily average wind speed during January is 3.6 miles per hour on January 21.
Average Wind Speed in January
Wind Direction in January
Bay Point 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 Bay Point is essentially constant during January, remaining around 53°F throughout.
The lowest average surface water temperature during January is 53°F on January 16.
Average Water Temperature in January
The average daily incident shortwave solar energy in Bay Point is gradually increasing during January, rising by 0.6 kWh, from 2.2 kWh to 2.8 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in January
For the purposes of this report, the geographical coordinates of Bay Point are 38.029 deg latitude, -121.962 deg longitude, and 75 ft elevation.
The topography within 2 miles of Bay Point contains very significant variations in elevation, with a maximum elevation change of 863 feet and an average elevation above sea level of 176 feet. Within 10 miles contains very significant variations in elevation (3,438 feet). Within 50 miles also contains extreme variations in elevation (4,078 feet).
The area within 2 miles of Bay Point is covered by artificial surfaces (29%), herbaceous vegetation (23%), grassland (20%), and cropland (15%), within 10 miles by herbaceous vegetation (28%) and grassland (25%), and within 50 miles by cropland (28%) and grassland (23%).
This report illustrates the typical weather in Bay Point 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Bay Point.
For each station, the records are corrected for the elevation difference between that station and Bay Point 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 Bay Point is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Bay Point and a given station.
The stations contributing to this reconstruction are: Buchanan Field Airport (73%, 9 kilometers, southwest); Travis Air Force Base (15%, 27 kilometers, north); Livermore Municipal Airport (8%, 40 kilometers, south); and Stockton Metropolitan Airport (3.8%, 66 kilometers, east).
Time zones for aiports and weather stations are provided by AskGeo.com .