Average Weather in January in San Luis Arizona, United States
Daily high temperatures increase by 4°F, from 68°F to 72°F, rarely falling below 60°F or exceeding 80°F.
Daily low temperatures increase by 2°F, from 47°F to 49°F, rarely falling below 40°F or exceeding 56°F.
For reference, on July 9, the hottest day of the year, temperatures in San Luis typically range from 81°F to 107°F, while on December 26, the coldest day of the year, they range from 46°F to 67°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 Luis experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 31% throughout the month.
The clearest day of the month is January 21, with clear, mostly clear, or partly cloudy conditions 70% of the time.
For reference, on February 20, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 35%, while on September 17, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 89%.
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 Luis, the chance of a wet day over the course of January is essentially constant, remaining around 6% throughout.
For reference, the year's highest daily chance of a wet day is 7% on August 26, and its lowest chance is 0% on June 11.
Probability of Precipitation in January
The average sliding 31-day rainfall during January in San Luis is essentially constant, remaining about 0.4 inches throughout, and rarely exceeding 1.1 inches.
Average Monthly Rainfall in January
Over the course of January in San Luis, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 33 minutes, implying an average daily increase of 1 minute, 6 seconds, and weekly increase of 7 minutes, 41 seconds.
The shortest day of the month is January 1, with 10 hours, 4 minutes of daylight and the longest day is January 31, with 10 hours, 37 minutes of daylight.
Hours of Daylight and Twilight in January
The latest sunrise of the month in San Luis is 7:41 AM on January 9 and the earliest sunrise is 7 minutes earlier at 7:34 AM on January 31.
The earliest sunset is 5:44 PM on January 1 and the latest sunset is 27 minutes later at 6:11 PM on January 31.
Daylight saving time is not observed in San Luis during 2020.
For reference, on June 20, the longest day of the year, the Sun rises at 5:32 AM and sets 14 hours, 17 minutes later, at 7:49 PM, while on December 21, the shortest day of the year, it rises at 7:37 AM and sets 10 hours, 1 minute later, at 5:38 PM.
Sunrise & Sunset with Twilight in January
The chance that a given day will be muggy in San Luis is essentially constant during January, remaining around 0% throughout.
For reference, on August 21, the muggiest day of the year, there are muggy conditions 50% 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 Luis is essentially constant during January, remaining within 0.1 miles per hour of 6.6 miles per hour throughout.
For reference, on April 26, the windiest day of the year, the daily average wind speed is 7.2 miles per hour, while on September 25, the calmest day of the year, the daily average wind speed is 5.8 miles per hour.
Average Wind Speed in January
The hourly average wind direction in San Luis throughout January is predominantly from the north, with a peak proportion of 64% on January 3.
Wind Direction in January
San Luis 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 San Luis is essentially constant during January, remaining around 60°F throughout.
The lowest average surface water temperature during January is 60°F on January 26.
Average Water Temperature in January
Temperatures in San Luis 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 January
The average accumulated growing degree days in San Luis are increasing during January, increasing by 256°F, from 0°F to 256°F, over the course of the month.
Growing Degree Days in January
The average daily incident shortwave solar energy in San Luis is gradually increasing during January, rising by 0.7 kWh, from 3.4 kWh to 4.1 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 Luis are 32.487 deg latitude, -114.782 deg longitude, and 125 ft elevation.
The topography within 2 miles of San Luis is essentially flat, with a maximum elevation change of 92 feet and an average elevation above sea level of 113 feet. Within 10 miles is essentially flat (233 feet). Within 50 miles contains only modest variations in elevation (3,652 feet).
The area within 2 miles of San Luis is covered by shrubs (49%), cropland (25%), and artificial surfaces (21%), within 10 miles by cropland (45%) and shrubs (44%), and within 50 miles by shrubs (65%) and cropland (18%).
This report illustrates the typical weather in San Luis 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in San Luis.
For each station, the records are corrected for the elevation difference between that station and San Luis 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 Luis is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between San Luis and a given station.
The stations contributing to this reconstruction are: Yuma International Airport (73%, 24 kilometers, northeast) and General Rodolfo Sánchez Taboada International Airport (27%, 46 kilometers, west).
Time zones for aiports and weather stations are provided by AskGeo.com .