Average Weather in January in San Joaquin California, United States
Daily high temperatures increase by 4°F, from 56°F to 60°F, rarely falling below 48°F or exceeding 68°F.
Daily low temperatures increase by 2°F, from 39°F to 41°F, rarely falling below 29°F or exceeding 50°F.
For reference, on July 18, the hottest day of the year, temperatures in San Joaquin typically range from 64°F to 98°F, while on December 30, the coldest day of the year, they range from 39°F to 56°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 San Joaquin experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 47% throughout the month.
The clearest day of the month is January 26, with clear, mostly clear, or partly cloudy conditions 54% of the time.
For reference, on February 17, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 49%, while on August 8, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 92%.
Cloud Cover Categories in January
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In San Joaquin, the chance of a wet day over the course of January is essentially constant, remaining around 21% throughout.
For reference, the year's highest daily chance of a wet day is 25% on February 20, and its lowest chance is 0% on August 6.
Probability of Precipitation in January
The average sliding 31-day rainfall during January in San Joaquin is essentially constant, remaining about 2.2 inches throughout, and rarely exceeding 5.1 inches or falling below 0.1 inches.
Average Monthly Rainfall in January
Over the course of January in San Joaquin, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 40 minutes, implying an average daily increase of 1 minute, 19 seconds, and weekly increase of 9 minutes, 14 seconds.
The shortest day of the month is January 1, with 9 hours, 43 minutes of daylight and the longest day is January 31, with 10 hours, 23 minutes of daylight.
Hours of Daylight and Twilight in January
The latest sunrise of the month in San Joaquin is 7:13 AM on January 6 and the earliest sunrise is 10 minutes earlier at 7:03 AM on January 31.
The earliest sunset is 4:56 PM on January 1 and the latest sunset is 30 minutes later at 5:25 PM on January 31.
Daylight saving time is observed in San Joaquin during 2018, 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 5:42 AM and sets 14 hours, 40 minutes later, at 8:22 PM, while on December 21, the shortest day of the year, it rises at 7:09 AM and sets 9 hours, 39 minutes later, at 4:48 PM.
Sunrise & Sunset with Twilight in January
The chance that a given day will be muggy in San Joaquin is essentially constant during January, remaining around 0% throughout.
For reference, on July 22, the muggiest day of the year, there are muggy conditions 1% 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
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in San Joaquin is essentially constant during January, remaining within 0.1 miles per hour of 5.5 miles per hour throughout.
For reference, on May 30, the windiest day of the year, the daily average wind speed is 9.5 miles per hour, while on January 13, the calmest day of the year, the daily average wind speed is 5.4 miles per hour.
The lowest daily average wind speed during January is 5.4 miles per hour on January 13.
Average Wind Speed in January
Wind Direction in January
The growing season in San Joaquin typically lasts for 10 months (313 days), from around January 27 to around December 5, rarely starting after February 25, or ending before November 16.
During January in San Joaquin, the chance that a given day is within the growing season is rapidly increasing rising from 21% to 57% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in January
The average accumulated growing degree days in San Joaquin are gradually increasing during January, increasing by 60°F, from 0°F to 60°F, over the course of the month.
Growing Degree Days in January
The average daily incident shortwave solar energy in San Joaquin is gradually increasing during January, rising by 0.6 kWh, from 2.5 kWh to 3.1 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 San Joaquin are 36.607 deg latitude, -120.189 deg longitude, and 171 ft elevation.
The topography within 2 miles of San Joaquin is essentially flat, with a maximum elevation change of 13 feet and an average elevation above sea level of 172 feet. Within 10 miles is essentially flat (138 feet). Within 50 miles contains only modest variations in elevation (5,138 feet).
The area within 2 miles of San Joaquin is covered by cropland (94%), within 10 miles by cropland (93%), and within 50 miles by cropland (55%) and grassland (31%).
This report illustrates the typical weather in San Joaquin 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 San Joaquin.
For each station, the records are corrected for the elevation difference between that station and San Joaquin 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 San Joaquin is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between San Joaquin and a given station.
The stations contributing to this reconstruction are: Lemoore Naval Air Station (Reeves Field) (37%, 37 kilometers, southeast); Madera Municipal Airport (30%, 43 kilometers, north); Fresno Air Terminal Airport (27%, 46 kilometers, northeast); and Hollister Municipal Airport (7%, 114 kilometers, west).
Time zones for aiports and weather stations are provided by AskGeo.com .