Average Weather in Merced California, United States
In Merced, the summers are hot, arid, and clear and the winters are short, cold, wet, and partly cloudy. Over the course of the year, the temperature typically varies from 38°F to 96°F and is rarely below 30°F or above 103°F.
The hot season lasts for 3.6 months, from June 4 to September 23, with an average daily high temperature above 87°F. The hottest day of the year is July 18, with an average high of 96°F and low of 64°F.
The cool season lasts for 2.9 months, from November 22 to February 19, with an average daily high temperature below 62°F. The coldest day of the year is December 30, with an average low of 38°F and high of 53°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, 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 Merced, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year in Merced begins around May 11 and lasts for 5.5 months, ending around October 28. On August 8, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 92% of the time, and overcast or mostly cloudy 8% of the time.
The cloudier part of the year begins around October 28 and lasts for 6.5 months, ending around May 11. On February 8, the cloudiest day of the year, the sky is overcast or mostly cloudy 51% of the time, and clear, mostly clear, or partly cloudy 49% of the time.
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Merced varies throughout the year.
The wetter season lasts 5.2 months, from November 4 to April 9, with a greater than 14% chance of a given day being a wet day. The chance of a wet day peaks at 28% on February 20.
The drier season lasts 6.8 months, from April 9 to November 4. The smallest chance of a wet day is 0% on July 31.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 28% on February 20.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Merced experiences significant seasonal variation in monthly rainfall.
The rainy period of the year lasts for 7.3 months, from October 6 to May 14, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around February 16, with an average total accumulation of 3.1 inches.
The rainless period of the year lasts for 4.7 months, from May 14 to October 6. The least rain falls around August 12, with an average total accumulation of 0.0 inches.
Average Monthly Rainfall
The length of the day in Merced varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 35 minutes of daylight; the longest day is June 21, with 14 hours, 44 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:40 AM on June 13, and the latest sunrise is 1 hour, 49 minutes later at 7:30 AM on November 4. The earliest sunset is at 4:44 PM on December 6, and the latest sunset is 3 hours, 42 minutes later at 8:26 PM on June 28.
Daylight saving time (DST) is observed in Merced during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.
Sunrise & Sunset with Twilight and Daylight Saving Time
The perceived humidity level in Merced, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.
Humidity Comfort Levels
The average hourly wind speed in Merced experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 4.4 months, from April 10 to August 23, with average wind speeds of more than 3.6 miles per hour. The windiest day of the year is June 6, with an average hourly wind speed of 4.5 miles per hour.
The calmer time of year lasts for 7.6 months, from August 23 to April 10. The calmest day of the year is November 2, with an average hourly wind speed of 2.8 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Merced varies throughout the year.
The wind is most often from the west for 9.5 months, from February 8 to November 22, with a peak percentage of 94% on July 19. The wind is most often from the north for 2.5 months, from November 22 to February 8, with a peak percentage of 28% on January 1.
The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.
The brighter period of the year lasts for 3.6 months, from May 5 to August 24, with an average daily incident shortwave energy per square meter above 7.2 kWh. The brightest day of the year is June 23, with an average of 8.5 kWh.
The darker period of the year lasts for 3.5 months, from November 3 to February 18, with an average daily incident shortwave energy per square meter below 3.6 kWh. The darkest day of the year is December 23, with an average of 2.3 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Merced are 37.302 deg latitude, -120.483 deg longitude, and 167 ft elevation.
The topography within 2 miles of Merced is essentially flat, with a maximum elevation change of 46 feet and an average elevation above sea level of 167 feet. Within 10 miles is essentially flat (466 feet). Within 50 miles contains only modest variations in elevation (6,939 feet).
The area within 2 miles of Merced is covered by artificial surfaces (84%) and cropland (16%), within 10 miles by cropland (66%) and grassland (24%), and within 50 miles by cropland (42%) and grassland (36%).
This report illustrates the typical weather in Merced, 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 Merced.
For each station, the records are corrected for the elevation difference between that station and Merced 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 Merced is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Merced and a given station.
The stations contributing to this reconstruction are: Merced Municipal Airport (86%, 3.3 kilometers, southwest); Castle Airport (13%, 12 kilometers, northwest); and Madera Municipal Airport (1.5%, 48 kilometers, southeast).
Time zones for aiports and weather stations are provided by AskGeo.com .