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Average Weather in Anza California, United States

In Anza, the summers are hot, arid, and mostly clear and the winters are long, very cold, and partly cloudy. Over the course of the year, the temperature typically varies from 30°F to 88°F and is rarely below 21°F or above 94°F.


The hot season lasts for 3.3 months, from June 13 to September 22, with an average daily high temperature above 81°F. The hottest day of the year is July 27, with an average high of 88°F and low of 58°F.

The cold season lasts for 3.8 months, from November 21 to March 14, with an average daily high temperature below 62°F. The coldest day of the year is December 25, with an average low of 30°F and high of 55°F.

Average High and Low Temperature

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

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

Average Hourly Temperature in AnzaJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMhotcoldcoolwarmvery coldcomfortablefreezing
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < very cold < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.


In Anza, 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 Anza begins around April 22 and lasts for 6.5 months, ending around November 6. On September 7, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 89% of the time, and overcast or mostly cloudy 11% of the time.

The cloudier part of the year begins around November 6 and lasts for 5.5 months, ending around April 22. On February 20, the cloudiest day of the year, the sky is overcast or mostly cloudy 44% of the time, and clear, mostly clear, or partly cloudy 56% of the time.

Cloud Cover Categories

Cloud Cover Categories in AnzaclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Sep 789%Sep 789%Feb 2056%Feb 2056%Apr 2272%Apr 2272%Nov 673%Nov 673%clearovercastmostly clear
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.


A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Anza varies throughout the year.

The wetter season lasts 4.6 months, from November 20 to April 7, with a greater than 10% chance of a given day being a wet day. The chance of a wet day peaks at 19% on February 21.

The drier season lasts 7.4 months, from April 7 to November 20. The smallest chance of a wet day is 1% on June 13.

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 17% on February 21.

Daily Chance of Precipitation

Daily Chance of Precipitation in AnzawetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Feb 2119%Feb 2119%Jun 131%Jun 131%Jan 116%Jan 116%Nov 2010%Nov 2010%Apr 710%Apr 710%rainmixed
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).


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. Anza experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 5.7 months, from October 26 to April 17, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around February 19, with an average total accumulation of 2.3 inches.

The rainless period of the year lasts for 6.3 months, from April 17 to October 26. The least rain falls around June 15, with an average total accumulation of 0.1 inches.

Average Monthly Rainfall

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.


The length of the day in Anza varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 56 minutes of daylight; the longest day is June 20, with 14 hours, 23 minutes of daylight.

Hours of Daylight and Twilight

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 5:36 AM on June 11, and the latest sunrise is 1 hour, 33 minutes later at 7:08 AM on November 4. The earliest sunset is at 4:38 PM on December 4, and the latest sunset is 3 hours, 23 minutes later at 8:00 PM on June 29.

Daylight saving time (DST) is observed in Anza 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

Sunrise & Sunset with Twilight and Daylight Saving Time in AnzaJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 115:36 AMJun 115:36 AM8:00 PMJun 298:00 PMJun 29Dec 44:38 PMDec 44:38 PM7:08 AMNov 47:08 AMNov 4Mar 12DSTMar 12DSTDSTNov 5DSTNov 5daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2017. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.


We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The perceived humidity level in Anza, 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

Humidity Comfort Levels in AnzaJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Nov 220%Nov 220%Aug 171%Aug 171%drydrycomfortablecomfortable
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.


This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Anza experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 4.3 months, from February 27 to July 6, with average wind speeds of more than 6.0 miles per hour. The windiest day of the year is May 3, with an average hourly wind speed of 7.0 miles per hour.

The calmer time of year lasts for 7.8 months, from July 6 to February 27. The calmest day of the year is August 23, with an average hourly wind speed of 5.1 miles per hour.

Average Wind Speed

Average Wind Speed in AnzawindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph1 mph2 mph3 mph4 mph5 mph6 mph7 mph8 mph9 mph10 mph11 mph12 mphMay 37.0 mphMay 37.0 mphAug 235.1 mphAug 235.1 mphFeb 276.0 mphFeb 276.0 mphJul 66.0 mphJul 66.0 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Anza is from the west throughout the year.

Wind Direction

Wind Direction in AnzaJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westnortheastsouth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Anza 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 water temperature experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 2.9 months, from July 7 to October 5, with an average temperature above 68°F. The day of the year with the warmest water is August 23, with an average temperature of 70°F.

The time of year with cooler water lasts for 4.4 months, from December 8 to April 20, with an average temperature below 61°F. The day of the year with the coolest water is February 7, with an average temperature of 59°F.

Average Water Temperature

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

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 3.5 months, from April 23 to August 9, with an average daily incident shortwave energy per square meter above 7.5 kWh. The brightest day of the year is June 13, with an average of 8.7 kWh.

The darker period of the year lasts for 3.2 months, from November 6 to February 11, with an average daily incident shortwave energy per square meter below 4.2 kWh. The darkest day of the year is December 22, with an average of 3.1 kWh.

Average Daily Incident Shortwave Solar Energy

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.


For the purposes of this report, the geographical coordinates of Anza are 33.555 deg latitude, -116.674 deg longitude, and 4,032 ft elevation.

The topography within 2 miles of Anza contains significant variations in elevation, with a maximum elevation change of 728 feet and an average elevation above sea level of 3,993 feet. Within 10 miles contains significant variations in elevation (4,531 feet). Within 50 miles also contains extreme variations in elevation (11,719 feet).

The area within 2 miles of Anza is covered by shrubs (44%), grassland (35%), and cropland (22%), within 10 miles by shrubs (76%) and trees (12%), and within 50 miles by shrubs (72%).

Data Sources

This report illustrates the typical weather in Anza, 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Anza.

For each station, the records are corrected for the elevation difference between that station and Anza 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 Anza is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Anza and a given station.

The stations contributing to this reconstruction are: Palm Springs International Airport (20%, 34 kilometers, northeast); Thermal Airport (16%, 48 kilometers, east); Ramona Airport (24%, 62 kilometers, south); March Air Reserve Base (25%, 66 kilometers, northwest); and Oceanside, Camp Pendleton, Marine Corps Air Station (15%, 69 kilometers, southwest).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.


The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.