Average Weather in June in San Leandro California, United States
Daily high temperatures increase by 4°F, from 70°F to 73°F, rarely falling below 63°F or exceeding 83°F.
Daily low temperatures increase by 2°F, from 55°F to 57°F, rarely falling below 51°F or exceeding 61°F.
For reference, on September 11, the hottest day of the year, temperatures in San Leandro typically range from 58°F to 75°F, while on January 1, the coldest day of the year, they range from 43°F to 55°F.
Average High and Low Temperature in June
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on June. 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 June
The month of June in San Leandro experiences rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 26% to 12%.
The clearest day of the month is June 30, with clear, mostly clear, or partly cloudy conditions 88% of the time.
For reference, on January 11, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 55%, while on July 20, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 92%.
Cloud Cover Categories in June
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 Leandro, the chance of a wet day over the course of June is gradually decreasing, starting the month at 4% and ending it at 1%.
For reference, the year's highest daily chance of a wet day is 30% on February 20, and its lowest chance is 0% on July 24.
Probability of Precipitation in June
The average sliding 31-day rainfall during June in San Leandro is essentially constant, remaining about 0.2 inches throughout, and rarely exceeding 1.0 inches or falling below -0.0 inches.
Average Monthly Rainfall in June
Over the course of June in San Leandro, the length of the day is essentially constant. The shortest day of the month is June 1, with 14 hours, 36 minutes of daylight and the longest day is June 21, with 14 hours, 47 minutes of daylight.
Hours of Daylight and Twilight in June
The earliest sunrise of the month in San Leandro is 5:46 AM on June 13 and the latest sunrise is 4 minutes later at 5:50 AM on June 30.
The earliest sunset is 8:24 PM on June 1 and the latest sunset is 10 minutes later at 8:34 PM on June 28.
Daylight saving time is observed in San Leandro during 2018, but it neither starts nor ends during June, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:47 AM and sets 14 hours, 47 minutes later, at 8:33 PM, while on December 21, the shortest day of the year, it rises at 7:20 AM and sets 9 hours, 33 minutes later, at 4:53 PM.
Sunrise & Sunset with Twilight in June
The chance that a given day will be muggy in San Leandro is essentially constant during June, remaining around 0% throughout.
For reference, on September 10, the muggiest day of the year, there are muggy conditions 0% of the time, while on October 11, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in June
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in San Leandro is essentially constant during June, remaining within 0.2 miles per hour of 9.4 miles per hour throughout.
For reference, on June 6, the windiest day of the year, the daily average wind speed is 9.6 miles per hour, while on October 29, the calmest day of the year, the daily average wind speed is 6.9 miles per hour.
The highest daily average wind speed during June is 9.6 miles per hour on June 6.
Average Wind Speed in June
Wind Direction in June
San Leandro 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 Leandro is essentially constant during June, remaining within 1°F of 54°F throughout.
Average Water Temperature in June
Temperatures in San Leandro 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 June
The average accumulated growing degree days in San Leandro are increasing during June, increasing by 352°F, from 865°F to 1,218°F, over the course of the month.
Growing Degree Days in June
The average daily incident shortwave solar energy in San Leandro is gradually increasing during June, rising by 0.5 kWh, from 7.9 kWh to 8.4 kWh, over the course of the month.
The highest average daily incident shortwave solar energy during June is 8.4 kWh on June 29.
Average Daily Incident Shortwave Solar Energy in June
For the purposes of this report, the geographical coordinates of San Leandro are 37.725 deg latitude, -122.156 deg longitude, and 39 ft elevation.
The topography within 2 miles of San Leandro contains significant variations in elevation, with a maximum elevation change of 712 feet and an average elevation above sea level of 88 feet. Within 10 miles contains significant variations in elevation (2,001 feet). Within 50 miles contains large variations in elevation (4,324 feet).
The area within 2 miles of San Leandro is covered by artificial surfaces (95%), within 10 miles by artificial surfaces (36%) and water (28%), and within 50 miles by water (28%) and grassland (20%).
This report illustrates the typical weather in San Leandro 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 San Leandro.
For each station, the records are corrected for the elevation difference between that station and San Leandro 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 Leandro is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between San Leandro and a given station.
The stations contributing to this reconstruction are: Oakland International Airport (61%, 5.7 kilometers, west); Hayward Air Terminal Airport (34%, 9 kilometers, southeast); and Buchanan Field Airport (5.0%, 31 kilometers, north).
Time zones for aiports and weather stations are provided by AskGeo.com .