Average Weather in Shafter California, United States
In Shafter, the summers are sweltering, arid, and clear and the winters are cold and partly cloudy. Over the course of the year, the temperature typically varies from 39°F to 99°F and is rarely below 31°F or above 105°F.
Based on the tourism score, the best time of year to visit Shafter for warm-weather activities is from late May to early October.
The hot season lasts for 3.4 months, from June 8 to September 20, with an average daily high temperature above 91°F. The hottest day of the year is July 26, with an average high of 99°F and low of 69°F.
The cool season lasts for 3.2 months, from November 19 to February 24, with an average daily high temperature below 67°F. The coldest day of the year is December 30, with an average low of 39°F and high of 59°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 Shafter, 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 Shafter begins around May 7 and lasts for 5.8 months, ending around November 1. On August 9, 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 November 1 and lasts for 6.2 months, ending around May 7. On February 17, the cloudiest day of the year, the sky is overcast or mostly cloudy 43% of the time, and clear, mostly clear, or partly cloudy 57% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Shafter varies throughout the year.
The wetter season lasts 5.1 months, from November 9 to April 11, with a greater than 12% chance of a given day being a wet day. The chance of a wet day peaks at 23% on February 20.
The drier season lasts 6.9 months, from April 11 to November 9. The smallest chance of a wet day is 0% on June 27.
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 23% 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. Shafter experiences some seasonal variation in monthly rainfall.
The rainy period of the year lasts for 6.2 months, from October 21 to April 26, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around February 18, with an average total accumulation of 1.9 inches.
The rainless period of the year lasts for 5.8 months, from April 26 to October 21. The least rain falls around July 6, with an average total accumulation of 0.0 inches.
Average Monthly Rainfall
The length of the day in Shafter varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 45 minutes of daylight; the longest day is June 21, with 14 hours, 34 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:41 AM on June 13, and the latest sunrise is 1 hour, 40 minutes later at 7:20 AM on November 3. The earliest sunset is at 4:43 PM on December 5, and the latest sunset is 3 hours, 33 minutes later at 8:16 PM on June 28.
Daylight saving time (DST) is observed in Shafter 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 Shafter, 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 Shafter experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 4.5 months, from March 25 to August 11, with average wind speeds of more than 6.0 miles per hour. The windiest day of the year is May 31, with an average hourly wind speed of 7.1 miles per hour.
The calmer time of year lasts for 7.5 months, from August 11 to March 25. The calmest day of the year is November 8, with an average hourly wind speed of 4.8 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Shafter varies throughout the year.
The wind is most often from the west for 9.3 months, from February 15 to November 24, with a peak percentage of 69% on July 27. The wind is most often from the south for 2.7 months, from November 24 to February 15, with a peak percentage of 39% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Shafter 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 Shafter for general outdoor tourist activities is from late May to early October, with a peak score in the first week of September.
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 Shafter for hot-weather activities is from early July to late August, with a peak score in the third 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 Shafter typically lasts for 11 months (329 days), from around January 16 to around December 11, rarely starting after February 23, or ending before November 20.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Shafter should appear around February 2, only rarely appearing before January 22 or after February 15.
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 3.6 months, from May 2 to August 22, with an average daily incident shortwave energy per square meter above 7.4 kWh. The brightest day of the year is June 22, with an average of 8.6 kWh.
The darker period of the year lasts for 3.3 months, from November 5 to February 14, with an average daily incident shortwave energy per square meter below 3.9 kWh. The darkest day of the year is December 25, with an average of 2.7 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Shafter are 35.501 deg latitude, -119.272 deg longitude, and 344 ft elevation.
The topography within 2 miles of Shafter is essentially flat, with a maximum elevation change of 52 feet and an average elevation above sea level of 347 feet. Within 10 miles is essentially flat (407 feet). Within 50 miles contains only modest variations in elevation (8,638 feet).
The area within 2 miles of Shafter is covered by cropland (90%), within 10 miles by cropland (91%), and within 50 miles by grassland (41%) and cropland (35%).
This report illustrates the typical weather in Shafter, 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 6 weather stations near enough to contribute to our estimation of the temperature and dew point in Shafter.
For each station, the records are corrected for the elevation difference between that station and Shafter 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 Shafter is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Shafter and a given station.
The stations contributing to this reconstruction are: Meadows Field (67%, 21 kilometers, east); Porterville Municipal Airport (14%, 62 kilometers, north); Santa Ynez Airport (4.9%, 124 kilometers, southwest); Paso Robles Municipal Airport (4.8%, 124 kilometers, west); Santa Maria Airport (4.7%, 126 kilometers, southwest); and San Luis Obispo County Airport (4.6%, 128 kilometers, west).
Time zones for aiports and weather stations are provided by AskGeo.com .