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Average Weather in July in Monterey California, United States

In Monterey, the month of July is characterized by essentially constant daily high temperatures, with daily highs around 66°F throughout the month, rarely exceeding 72°F or dropping below 60°F.

Daily low temperatures are around 54°F, rarely falling below 51°F or exceeding 59°F.

For reference, on October 2, the hottest day of the year, temperatures in Monterey typically range from 54°F to 68°F, while on January 3, the coldest day of the year, they range from 44°F to 60°F.

Average High and Low Temperature in July

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 hourly average temperatures for the quarter of the year centered on July. 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 July

Average Hourly Temperature in July in Monterey12 AM4 AM8 AM12 PM4 PM8 PM12 AM181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930303131JunAugcoldcoolcomfortable
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 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.

Clouds

The month of July in Monterey experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 13% to 9%.

The clearest day of the month is July 29, with clear, mostly clear, or partly cloudy conditions 91% of the time.

For reference, on February 16, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 51%, while on August 7, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 91%.

Cloud Cover in July

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.

Precipitation

Sun

Over the course of July in Monterey, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 36 minutes, implying an average daily decrease of 1 minute, 12 seconds, and weekly decrease of 8 minutes, 22 seconds.

The shortest day of the month is July 31, with 14 hours, 1 minute of daylight and the longest day is July 1, with 14 hours, 37 minutes of daylight.

Hours of Daylight and Twilight in July

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 of the month in Monterey is 5:52 AM on July 1 and the latest sunrise is 20 minutes later at 6:13 AM on July 31.

The latest sunset is 8:29 PM on July 1 and the earliest sunset is 16 minutes earlier at 8:14 PM on July 31.

Daylight saving time is observed in Monterey during 2017, but it neither starts nor ends during July, so the entire month is in daylight saving time.

For reference, on June 21, the longest day of the year, the Sun rises at 5:49 AM and sets 14 hours, 40 minutes later, at 8:29 PM, while on December 21, the shortest day of the year, it rises at 7:16 AM and sets 9 hours, 39 minutes later, at 4:55 PM.

Sunrise & Sunset with Twilight in July

The solar day over the course of July. 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.

Humidity

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 chance that a given day will be muggy in Monterey is essentially constant during July, remaining around 0% throughout.

For reference, on September 16, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 17, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in July

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.

Wind

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 Monterey is essentially constant during July, remaining within 0.2 miles per hour of 3.6 miles per hour throughout.

For reference, on April 12, the windiest day of the year, the daily average wind speed is 4.5 miles per hour, while on September 16, the calmest day of the year, the daily average wind speed is 3.4 miles per hour.

Average Wind Speed in July

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
The hourly average wind direction in Monterey throughout July is predominantly from the west, with a peak proportion of 74% on July 30.

Wind Direction in July

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

Monterey 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 Monterey is gradually increasing during July, rising by 2°F, from 56°F to 58°F, over the course of the month.

Average Water Temperature in July

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 in Monterey is essentially constant during July, remaining within 0.2 kWh of 8.2 kWh throughout.

Average Daily Incident Shortwave Solar Energy in July

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

Topography

For the purposes of this report, the geographical coordinates of Monterey are 36.600 deg latitude, -121.895 deg longitude, and 131 ft elevation.

The topography within 2 miles of Monterey contains significant variations in elevation, with a maximum elevation change of 804 feet and an average elevation above sea level of 175 feet. Within 10 miles contains significant variations in elevation (2,697 feet). Within 50 miles contains large variations in elevation (5,863 feet).

The area within 2 miles of Monterey is covered by artificial surfaces (54%) and water (27%), within 10 miles by water (50%) and shrubs (12%), and within 50 miles by water (49%) and grassland (16%).

Data Sources

This report illustrates the typical weather in Monterey 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Monterey.

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

The stations contributing to this reconstruction are: Monterey Regional Airport (93%, 5.8 kilometers, east) and Watsonville Municipal Airport (7%, 39 kilometers, north).

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.