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Average Weather in San Ramón Bolivia

In San Ramón, the wet season is oppressive and overcast, the dry season is muggy and partly cloudy, and it is hot year round. Over the course of the year, the temperature typically varies from 66°F to 94°F and is rarely below 57°F or above 101°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 San RamónJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMhotwarmcomfortable
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.


In San Ramón, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.

The clearer part of the year in San Ramón begins around May 14 and lasts for 4.5 months, ending around September 30. On July 30, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 71% of the time, and overcast or mostly cloudy 29% of the time.

The cloudier part of the year begins around September 30 and lasts for 7.5 months, ending around May 14. On February 9, the cloudiest day of the year, the sky is overcast or mostly cloudy 86% of the time, and clear, mostly clear, or partly cloudy 14% of the time.

Cloud Cover Categories

Cloud Cover Categories in San RamónclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 3071%Jul 3071%Feb 914%Feb 914%May 1442%May 1442%Sep 3042%Sep 3042%clearmostly cloudyovercastmostly 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 San Ramón varies very significantly throughout the year.

The wetter season lasts 6.2 months, from October 16 to April 22, with a greater than 40% chance of a given day being a wet day. The chance of a wet day peaks at 73% on January 11.

The drier season lasts 5.8 months, from April 22 to October 16. The smallest chance of a wet day is 8% on July 20.

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 73% on January 11.

Daily Chance of Precipitation

Daily Chance of Precipitation in San RamónwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jan 1173%Jan 1173%Jul 208%Jul 208%Jan 167%Jan 167%Oct 1641%Oct 1641%Apr 2240%Apr 2240%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).


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. San Ramón experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in San Ramón. The most rain falls during the 31 days centered around January 11, with an average total accumulation of 9.8 inches.

The least rain falls around July 1, with an average total accumulation of 0.7 inches.

Average Monthly Rainfall

Average Monthly Rainfall in San RamónJanFebMarAprMayJunJulAugSepOctNovDec0 in2 in4 in6 in8 in10 in12 in14 in16 inJan 119.8 inJan 119.8 inJul 10.7 inJul 10.7 in
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 San Ramón varies over the course of the year. In 2017, the shortest day is June 21, with 11 hours, 21 minutes of daylight; the longest day is December 21, with 12 hours, 55 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 5:41 AM on November 20, and the latest sunrise is 1 hour, 1 minute later at 6:42 AM on July 10. The earliest sunset is at 5:58 PM on May 30, and the latest sunset is 55 minutes later at 6:53 PM on January 23.

Daylight saving time (DST) is not observed in San Ramón during 2017.

Sunrise & Sunset with Twilight

Sunrise & Sunset with Twilight in San RamónJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMNov 205:41 AMNov 205:41 AM6:53 PMJan 236:53 PMJan 23May 305:58 PMMay 305:58 PM6:42 AMJul 106:42 AMJul 10daynightnight
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.


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.

San Ramón experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 10 months, from September 1 to July 7, during which time the comfort level is muggy, oppressive, or miserable at least 53% of the time. The muggiest day of the year is January 12, with muggy conditions 100% of the time.

The least muggy day of the year is August 1, with muggy conditions 37% of the time.

Humidity Comfort Levels

Humidity Comfort Levels in San RamónmuggymuggyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Aug 137%Aug 137%100%Jan 12100%Jan 12Sep 153%Sep 153%Jul 753%Jul 753%oppressiveoppressivehumidhumiddrydrymuggymuggymiserablemiserablecomfortablecomfortable
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 San Ramón does not vary significantly over the course of the year, remaining within 0.5 miles per hour of 3.2 miles per hour throughout.

Average Wind Speed

Average Wind Speed in San RamónJanFebMarAprMayJunJulAugSepOctNovDec0.0 mph0.5 mph1.0 mph1.5 mph2.0 mph2.5 mph3.0 mph3.5 mph4.0 mph4.5 mph5.0 mph5.5 mph6.0 mphSep 123.7 mphSep 123.7 mphApr 132.7 mphApr 132.7 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 San Ramón is from the north throughout the year.

Wind Direction

Wind Direction in San RamónJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%northeastsouthwest
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).

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 per square meter does not vary significantly over the course of the year, remaining within 0.3 kilowatt-hours of 5.2 kilowatt-hours throughout.

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 San Ramón are -13.283 deg latitude, -64.717 deg longitude, and 453 ft elevation.

The topography within 2 miles of San Ramón is essentially flat, with a maximum elevation change of 79 feet and an average elevation above sea level of 458 feet. Within 10 miles is essentially flat (98 feet). Within 50 miles also contains only modest variations in elevation (299 feet).

The area within 2 miles of San Ramón is covered by trees (72%) and water (13%), within 10 miles by trees (39%) and shrubs (33%), and within 50 miles by shrubs (29%) and trees (27%).

Data Sources

This report illustrates the typical weather in San Ramón, 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, Teniente Jorge Henrich Arauz Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of San Ramón.

At a distance of 172 kilometers from San Ramón, further than our threshold of 150 kilometers, this station is deemed insufficiently nearby to be relied upon as our primary source for temperature and dew point records. Consequently, the station records are blended with interpolated values from NASA's MERRA-2 satellite-era reanalysis , and both are corrected for elevation differences according to the International Standard Atmosphere .

The weight assigned to the MERRA-2 value depends on the distance from San Ramón to the nearest station, increasing from 0% at 150 kilometers to 100% at 200 kilometers. In this case, the MERRA-2 weight is 31%, making the weight assigned to the weather station 69%.

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.