Average Weather in Placerville California, United States
In Placerville, the summers are hot, arid, and mostly clear and the winters are long, cold, wet, and partly cloudy. Over the course of the year, the temperature typically varies from 41°F to 90°F and is rarely below 33°F or above 98°F.
Based on the tourism score, the best time of year to visit Placerville for warm-weather activities is from mid June to late September.
The hot season lasts for 3.1 months, from June 16 to September 19, with an average daily high temperature above 83°F. The hottest day of the year is July 27, with an average high of 90°F and low of 68°F.
The cool season lasts for 3.9 months, from November 15 to March 13, with an average daily high temperature below 61°F. The coldest day of the year is December 27, with an average low of 41°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 Placerville, 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 Placerville begins around May 22 and lasts for 5.0 months, ending around October 23. On July 29, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 91% of the time, and overcast or mostly cloudy 9% of the time.
The cloudier part of the year begins around October 23 and lasts for 7.0 months, ending around May 22. On February 21, the cloudiest day of the year, the sky is overcast or mostly cloudy 59% of the time, and clear, mostly clear, or partly cloudy 41% of the time.
Cloud Cover Categories
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. The chance of wet days in Placerville varies significantly throughout the year.
The wetter season lasts 6.0 months, from October 28 to April 26, with a greater than 17% chance of a given day being a wet day. The chance of a wet day peaks at 34% on February 28.
The drier season lasts 6.0 months, from April 26 to October 28. The smallest chance of a wet day is 0% on July 19.
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 34% 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. Placerville experiences extreme seasonal variation in monthly rainfall.
The rainy period of the year lasts for 8.7 months, from September 19 to June 9, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around February 17, with an average total accumulation of 5.7 inches.
The rainless period of the year lasts for 3.3 months, from June 9 to September 19. The least rain falls around July 31, with an average total accumulation of 0.0 inches.
Average Monthly Rainfall
The length of the day in Placerville varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 27 minutes of daylight; the longest day is June 21, with 14 hours, 53 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:37 AM on June 13, and the latest sunrise is 1 hour, 55 minutes later at 7:32 AM on November 3. The earliest sunset is at 4:41 PM on December 7, and the latest sunset is 3 hours, 51 minutes later at 8:32 PM on June 27.
Daylight saving time (DST) is observed in Placerville during 2018, starting in the spring on March 11, lasting 7.8 months, and ending in the fall on November 4.
Sunrise & Sunset with Twilight and Daylight Saving Time
The perceived humidity level in Placerville, 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
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Placerville experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 4.0 months, from November 21 to March 20, with average wind speeds of more than 5.7 miles per hour. The windiest day of the year is December 18, with an average hourly wind speed of 6.2 miles per hour.
The calmer time of year lasts for 8.0 months, from March 20 to November 21. The calmest day of the year is September 24, with an average hourly wind speed of 5.2 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Placerville varies throughout the year.
The wind is most often from the south for 3.2 months, from February 4 to May 10 and for 3.9 weeks, from November 5 to December 2, with a peak percentage of 45% on March 2. The wind is most often from the west for 4.4 months, from May 10 to September 21, with a peak percentage of 43% on July 14. The wind is most often from the east for 1.5 months, from September 21 to November 5 and for 2.1 months, from December 2 to February 4, with a peak percentage of 38% on October 21.
Best Time of Year to Visit
To characterize how pleasant the weather is in Placerville throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Placerville for general outdoor tourist activities is from mid June to late September, with a peak score in the first week of August.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Placerville for hot-weather activities is from early July to late August, with a peak score in the last week of July.
For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.
Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.
The growing season in Placerville typically lasts for 10 months (308 days), from around February 19 to around December 24, rarely starting after April 4, or ending before November 21.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Placerville should appear around February 17, only rarely appearing before January 31 or after March 11.
Growing Degree Days
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 3.4 months, from May 11 to August 24, with an average daily incident shortwave energy per square meter above 7.3 kWh. The brightest day of the year is June 29, with an average of 8.6 kWh.
The darker period of the year lasts for 3.6 months, from November 2 to February 19, with an average daily incident shortwave energy per square meter below 3.4 kWh. The darkest day of the year is December 19, with an average of 2.1 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Placerville are 38.730 deg latitude, -120.799 deg longitude, and 1,890 ft elevation.
The topography within 2 miles of Placerville contains very significant variations in elevation, with a maximum elevation change of 1,302 feet and an average elevation above sea level of 1,977 feet. Within 10 miles contains very significant variations in elevation (3,199 feet). Within 50 miles contains large variations in elevation (10,850 feet).
The area within 2 miles of Placerville is covered by shrubs (81%), within 10 miles by shrubs (54%) and trees (29%), and within 50 miles by trees (37%) and grassland (21%).
This report illustrates the typical weather in Placerville, 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 Placerville.
For each station, the records are corrected for the elevation difference between that station and Placerville 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 Placerville is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Placerville and a given station.
The stations contributing to this reconstruction are: Placerville Airport (62%, 4.4 kilometers, east); Auburn Municipal Airport (28%, 35 kilometers, northwest); and Sacramento Mather Airport (10%, 47 kilometers, west).
Time zones for aiports and weather stations are provided by AskGeo.com .