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Average Weather in Fetters Hot Springs-Agua Caliente California, United States

In Fetters Hot Springs-Agua Caliente, the summers are long, warm, arid, and mostly clear and the winters are short, cold, wet, and partly cloudy. Over the course of the year, the temperature typically varies from 37°F to 84°F and is rarely below 28°F or above 94°F.

Based on the tourism score, the best time of year to visit Fetters Hot Springs-Agua Caliente for warm-weather activities is from late June to early September.

Climate Summary

coolcomfortablewarmcoolJanFebMarAprMayJunJulAugSepOctNovDec92%92%42%42%clearovercastprecipitation: 5.0 inprecipitation: 5.0 in0.0 in0.0 inmuggy: 0%muggy: 0%0%0%drydrytourism score: 6.7tourism score: 6.70.50.5
Click on each chart for more information.

Temperature

The warm season lasts for 4.2 months, from June 5 to October 12, with an average daily high temperature above 78°F. The hottest day of the year is August 24, with an average high of 84°F and low of 53°F.

The cool season lasts for 2.5 months, from November 28 to February 12, with an average daily high temperature below 60°F. The coldest day of the year is January 1, with an average low of 37°F and high of 54°F.

Average High and Low Temperature

Average High and Low Temperature in Fetters Hot Springs-Agua CalientewarmcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F10°F20°F30°F40°F50°F60°F70°F80°F90°F100°FJan 154°FJan 154°FAug 2484°FAug 2484°F37°F37°F53°F53°FJun 578°FJun 578°FOct 1278°FOct 1278°FFeb 1260°FFeb 1260°F50°F50°F48°F48°F40°F40°F
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 Fetters Hot Springs-Agua CalienteJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMvery coldvery coldcoldcoolcoolwarmcomfortablevery coldvery cold
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 average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Chillán, Chile (6,099 miles away) and Kendenup, Australia (9,153 miles) are the far-away foreign places with temperatures most similar to Fetters Hot Springs-Agua Caliente (view comparison).

Clouds

In Fetters Hot Springs-Agua Caliente, 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 Fetters Hot Springs-Agua Caliente begins around May 16 and lasts for 5.2 months, ending around October 24. On July 20, 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 October 24 and lasts for 6.8 months, ending around May 16. On January 11, the cloudiest day of the year, the sky is overcast or mostly cloudy 58% of the time, and clear, mostly clear, or partly cloudy 42% of the time.

Cloud Cover Categories

Cloud Cover Categories in Fetters Hot Springs-Agua CalienteclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2092%Jul 2092%Jan 1142%Jan 1142%May 1667%May 1667%Oct 2467%Oct 2467%clearovercastmostly clearpartly cloudymostly cloudy
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Fetters Hot Springs-Agua Caliente varies significantly throughout the year.

The wetter season lasts 5.2 months, from November 2 to April 9, with a greater than 16% chance of a given day being a wet day. The chance of a wet day peaks at 32% on February 20.

The drier season lasts 6.8 months, from April 9 to November 2. The smallest chance of a wet day is 0% on July 25.

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 32% on February 20.

Daily Chance of Precipitation

Daily Chance of Precipitation in Fetters Hot Springs-Agua CalientewetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Feb 2032%Feb 2032%Jul 250%Jul 250%Jan 128%Jan 128%Nov 216%Nov 216%Apr 916%Apr 916%rain
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 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. Fetters Hot Springs-Agua Caliente experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 7.8 months, from September 30 to May 25, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around February 16, with an average total accumulation of 5.0 inches.

The rainless period of the year lasts for 4.2 months, from May 25 to September 30. The least rain falls around July 29, with an average total accumulation of 0.0 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.

Sun

The length of the day in Fetters Hot Springs-Agua Caliente varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 30 minutes of daylight; the longest day is June 21, with 14 hours, 50 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in Fetters Hot Springs-Agua CalienteJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2014 hr, 50 minJun 2114 hr, 50 minJun 2112 hr, 9 minSep 2212 hr, 9 minSep 229 hr, 30 minDec 219 hr, 30 minDec 21nightnightday
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 5:45 AM on June 13, and the latest sunrise is 1 hour, 53 minutes later at 7:38 AM on November 3. The earliest sunset is at 4:49 PM on December 6, and the latest sunset is 3 hours, 48 minutes later at 8:37 PM on June 28.

Daylight saving time (DST) is observed in Fetters Hot Springs-Agua Caliente 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

Sunrise & Sunset with Twilight and Daylight Saving Time in Fetters Hot Springs-Agua CalienteJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 135:45 AMJun 135:45 AM8:37 PMJun 288:37 PMJun 28Dec 64:49 PMDec 64:49 PM7:38 AMNov 37:38 AMNov 3Mar 11DSTMar 11DSTDSTNov 4DSTNov 4daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2018. 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.

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 perceived humidity level in Fetters Hot Springs-Agua Caliente, 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 Fetters Hot Springs-Agua CalienteJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Dec 150%Dec 150%Sep 180%Sep 180%comfortablecomfortabledrydry
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

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 Fetters Hot Springs-Agua Caliente experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.0 months, from February 15 to August 16, with average wind speeds of more than 6.9 miles per hour. The windiest day of the year is May 30, with an average hourly wind speed of 7.6 miles per hour.

The calmer time of year lasts for 6.0 months, from August 16 to February 15. The calmest day of the year is October 29, with an average hourly wind speed of 6.3 miles per hour.

Average Wind Speed

Average Wind Speed in Fetters Hot Springs-Agua CalientewindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph1 mph2 mph3 mph4 mph5 mph6 mph7 mph8 mph9 mph10 mph11 mphMay 307.6 mphMay 307.6 mphOct 296.3 mphOct 296.3 mphFeb 156.9 mphFeb 156.9 mphAug 166.9 mphAug 166.9 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 Fetters Hot Springs-Agua Caliente varies throughout the year.

The wind is most often from the west for 8.2 months, from February 23 to October 29, with a peak percentage of 83% on July 31. The wind is most often from the north for 3.8 months, from October 29 to February 23, with a peak percentage of 47% on January 1.

Wind Direction

Wind Direction in Fetters Hot Springs-Agua CalienteNWNJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westnorthsoutheast
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 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

Fetters Hot Springs-Agua Caliente 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 2.4 months, from August 11 to October 25, with an average temperature above 56°F. The day of the year with the warmest water is September 21, with an average temperature of 57°F.

The time of year with cooler water lasts for 3.1 months, from March 21 to June 25, with an average temperature below 53°F. The day of the year with the coolest water is May 12, with an average temperature of 52°F.

Average Water Temperature

Average Water Temperature in Fetters Hot Springs-Agua CalientewarmcoolJanFebMarAprMayJunJulAugSepOctNovDec48°F50°F52°F54°F56°F58°F60°F62°FSep 2157°FSep 2157°F52°FMay 1252°FMay 12Aug 1156°FAug 1156°FMar 2153°FMar 2153°FJun 2553°FJun 2553°F
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Best Time of Year to Visit

To characterize how pleasant the weather is in Fetters Hot Springs-Agua Caliente 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 Fetters Hot Springs-Agua Caliente for general outdoor tourist activities is from late June to early September, with a peak score in the last week of July.

Tourism Score

Tourism Score in Fetters Hot Springs-Agua Calientebest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.76.70.50.5precipitationprecipitationcloudscloudstemperaturetemperaturetourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

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 Fetters Hot Springs-Agua Caliente for hot-weather activities is from mid June to early September, with a peak score in the third week of July.

Beach/Pool Score

Beach/Pool Score in Fetters Hot Springs-Agua Calientebest timeJanFebMarAprMayJunJulAugSepOctNovDec02468102.92.90.00.0precipitationprecipitationcloudscloudstemperaturetemperaturebeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

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.

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).

The growing season in Fetters Hot Springs-Agua Caliente typically lasts for 9.2 months (278 days), from around February 22 to around November 28, rarely starting before January 16 or after April 7, and rarely ending before November 7 or after January 1.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Fetters Hot Springs-Agua Calientegrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Feb 2250%Feb 2250%Nov 2850%Nov 2890%Apr 790%Apr 790%Nov 790%Nov 710%Jan 1610%Jan 1610%Jan 110%Jan 1Aug 4100%Aug 4100%very coldcoldcoolcomfortablewarmhot
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 percentage of time spent in various temperature bands. 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.

Based on growing degree days alone, the first spring blooms in Fetters Hot Springs-Agua Caliente should appear around February 20, only rarely appearing before February 7 or after March 8.

Growing Degree Days

Growing Degree Days in Fetters Hot Springs-Agua CalienteJanFebMarAprMayJunJulAugSepOctNovDec0°F500°F1,000°F1,500°F2,000°F2,500°F3,000°FFeb 2090°FFeb 2090°FJun 13900°FJun 13900°FAug 101,800°FAug 101,800°FDec 313,042°FDec 313,042°F
The average growing degree days accumulated over the course of the year, 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 May 8 to August 25, with an average daily incident shortwave energy per square meter above 7.2 kWh. The brightest day of the year is June 28, with an average of 8.5 kWh.

The darker period of the year lasts for 3.5 months, from November 3 to February 19, with an average daily incident shortwave energy per square meter below 3.3 kWh. The darkest day of the year is December 25, with an average of 2.0 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in Fetters Hot Springs-Agua CalientebrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWh10 kWhJun 288.5 kWhJun 288.5 kWhDec 252.0 kWhDec 252.0 kWhMay 87.2 kWhMay 87.2 kWhAug 257.2 kWhAug 257.2 kWhFeb 193.3 kWhFeb 193.3 kWh
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 Fetters Hot Springs-Agua Caliente are 38.321 deg latitude, -122.487 deg longitude, and 348 ft elevation.

The topography within 2 miles of Fetters Hot Springs-Agua Caliente contains very significant variations in elevation, with a maximum elevation change of 1,165 feet and an average elevation above sea level of 344 feet. Within 10 miles contains very significant variations in elevation (2,694 feet). Within 50 miles contains large variations in elevation (4,701 feet).

The area within 2 miles of Fetters Hot Springs-Agua Caliente is covered by cropland (29%), artificial surfaces (22%), grassland (19%), and trees (17%), within 10 miles by grassland (38%) and cropland (21%), and within 50 miles by water (24%) and grassland (22%).

Data Sources

This report illustrates the typical weather in Fetters Hot Springs-Agua Caliente, 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 Fetters Hot Springs-Agua Caliente.

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

The stations contributing to this reconstruction are: Gnoss Field (41%, 20 kilometers, south); Napa County Airport (38%, 22 kilometers, southeast); and Sonoma County Airport (21%, 35 kilometers, northwest).

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.