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Average Weather in October in Carmel-by-the-Sea California, United States

In Carmel-by-the-Sea, the month of October is characterized by gradually falling daily high temperatures, with daily highs decreasing by 2°F, from 67°F to 64°F over the course of the month, and rarely exceeding 76°F or dropping below 58°F. The highest daily average high temperature is 67°F on October 3.

Daily low temperatures decrease by 3°F, from 54°F to 51°F, rarely falling below 45°F or exceeding 59°F.

For reference, on October 2, the hottest day of the year, temperatures in Carmel-by-the-Sea typically range from 54°F to 67°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 October

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 October. 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 October

Average Hourly Temperature in October in Carmel-by-the-Sea18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM4 AM8 AM12 PM4 PM8 PM12 AMSepNovcoldcool
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.

Clouds

The month of October in Carmel-by-the-Sea experiences rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 17% to 32%.

The clearest day of the month is October 1, with clear, mostly clear, or partly cloudy conditions 83% 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 Categories in October

Cloud Cover Categories in October in Carmel-by-the-Sea1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SepNovOct 183%Oct 183%Oct 3168%Oct 3168%Oct 1178%Oct 1178%Oct 2174%Oct 2174%clearovercastmostly clearmostly cloudypartly cloudy
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

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Carmel-by-the-Sea, the chance of a wet day over the course of October is very rapidly increasing, starting the month at 3% and ending it at 12%.

For reference, the year's highest daily chance of a wet day is 30% on February 21, and its lowest chance is 0% on July 22.

Probability of Precipitation in October

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).

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during October in Carmel-by-the-Sea is increasing, starting the month at 0.4 inches, when it rarely exceeds 1.3 inches, and ending the month at 1.3 inches, when it rarely exceeds 3.1 inches.

Average Monthly Rainfall in October

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.

Sun

Over the course of October in Carmel-by-the-Sea, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 6 minutes, implying an average daily decrease of 2 minutes, 12 seconds, and weekly decrease of 15 minutes, 27 seconds.

The shortest day of the month is October 31, with 10 hours, 41 minutes of daylight and the longest day is October 1, with 11 hours, 47 minutes of daylight.

Hours of Daylight and Twilight in October

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 Carmel-by-the-Sea is 7:03 AM on October 1 and the latest sunrise is 27 minutes later at 7:30 AM on October 31.

The latest sunset is 6:50 PM on October 1 and the earliest sunset is 39 minutes earlier at 6:11 PM on October 31.

Daylight saving time is observed in Carmel-by-the-Sea during 2017, but it neither starts nor ends during October, 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, 40 minutes later, at 4:55 PM.

Sunrise & Sunset with Twilight and Daylight Saving Time in October

Sunrise & Sunset with Twilight and Daylight Saving Time in October in Carmel-by-the-Sea18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMSepNov7:03 AM7:03 AMOct 16:50 PMOct 16:50 PM7:30 AM7:30 AMOct 316:11 PMOct 316:11 PM7:11 AM7:11 AMOct 116:36 PMOct 116:36 PM7:20 AM7:20 AMOct 216:23 PMOct 216:23 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of October. 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 Carmel-by-the-Sea is essentially constant during October, 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 October

Humidity Comfort Levels in October in Carmel-by-the-Sea1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%10%20%30%40%50%60%70%80%90%100%SepNovOct 10%Oct 10%Oct 310%Oct 310%Oct 110%Oct 110%Oct 210%Oct 210%drydrycomfortablecomfortablehumidhumid
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 Carmel-by-the-Sea is essentially constant during October, remaining within 0.2 miles per hour of 6.9 miles per hour throughout.

For reference, on March 29, the windiest day of the year, the daily average wind speed is 8.7 miles per hour, while on September 16, the calmest day of the year, the daily average wind speed is 6.6 miles per hour.

Average Wind Speed in October

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
The wind direction in Carmel-by-the-Sea during October is predominantly out of the west from October 1 to October 9 and the north from October 9 to October 31.

Wind Direction in October

Wind Direction in October in Carmel-by-the-SeaWN1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SepNovwestnorthsoutheast
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

Carmel-by-the-Sea 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 Carmel-by-the-Sea is essentially constant during October, remaining within 1°F of 58°F throughout.

Average Water Temperature in October

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

Growing Season

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Temperatures in Carmel-by-the-Sea are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

Time Spent in Various Temperature Bands and the Growing Season in October

Time Spent in Various Temperature Bands and the Growing Season in October in Carmel-by-the-Sea1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SepNov100%Oct 16100%Oct 16coldcoolcomfortablevery cold
The percentage of time spent in various temperature 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 black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Carmel-by-the-Sea is increasing during October, increasing by 256°F, from 1,757°F to 2,012°F, over the course of the month.

Growing Degree Days in October

The average growing degree days accumulated over the course of October, 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 Carmel-by-the-Sea is rapidly decreasing during October, falling by 1.6 kWh, from 5.4 kWh to 3.8 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in October

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 Carmel-by-the-Sea are 36.555 deg latitude, -121.923 deg longitude, and 171 ft elevation.

The topography within 2 miles of Carmel-by-the-Sea contains very significant variations in elevation, with a maximum elevation change of 860 feet and an average elevation above sea level of 214 feet. Within 10 miles contains very significant variations in elevation (3,186 feet). Within 50 miles contains large variations in elevation (5,863 feet).

The area within 2 miles of Carmel-by-the-Sea is covered by artificial surfaces (29%), water (24%), shrubs (15%), and herbaceous vegetation (14%), within 10 miles by water (54%) and shrubs (13%), and within 50 miles by water (53%) and grassland (15%).

Data Sources

This report illustrates the typical weather in Carmel-by-the-Sea 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 is only a single weather station, Monterey Regional Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Carmel-by-the-Sea.

At a distance of 9 kilometers from Carmel-by-the-Sea, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.

The station records are corrected for the elevation difference between the station and Carmel-by-the-Sea according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.

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.

Disclaimer

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.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.