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September Weather in San Ignacio de Velasco Bolivia

Daily high temperatures are around 93°F, rarely falling below 82°F or exceeding 101°F.

Daily low temperatures increase by 3°F, from 68°F to 71°F, rarely falling below 59°F or exceeding 76°F.

For reference, on October 5, the hottest day of the year, temperatures in San Ignacio de Velasco typically range from 71°F to 94°F, while on July 18, the coldest day of the year, they range from 62°F to 87°F.

Average High and Low Temperature in September in San Ignacio de Velasco

Average High and Low Temperature in September in San Ignacio de VelascoSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303055°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°F90°F90°F95°F95°F100°F100°F105°F105°FAugOctSep 193°FSep 193°F68°F68°FSep 3094°FSep 3094°F71°F71°FSep 1193°FSep 1193°F69°F69°FSep 2193°FSep 2193°F70°F70°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 hourly average temperatures for the quarter of the year centered on September. 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 September in San Ignacio de Velasco

Average Hourly Temperature in September in San Ignacio de VelascoSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMAugOctcoolcomfortablecomfortablewarmwarmwarmhot
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.

Villa Corzo, Mexico (3,151 miles away) is the far-away foreign place with temperatures most similar to San Ignacio de Velasco (view comparison).

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The month of September in San Ignacio de Velasco experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 31% to 48%.

The clearest day of the month is September 1, with clear, mostly clear, or partly cloudy conditions 69% of the time.

For reference, on February 8, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 82%, while on August 17, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 73%.

Cloud Cover Categories in September in San Ignacio de Velasco

Cloud Cover Categories in September in San Ignacio de VelascoSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOctSep 169%Sep 169%Sep 3052%Sep 3052%Sep 1164%Sep 1164%Sep 2157%Sep 2157%clearmostly clearpartly cloudymostly cloudyovercast
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.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In San Ignacio de Velasco, the chance of a wet day over the course of September is very rapidly increasing, starting the month at 14% and ending it at 22%.

For reference, the year's highest daily chance of a wet day is 57% on February 16, and its lowest chance is 6% on July 17.

Probability of Precipitation in September in San Ignacio de Velasco

Probability of Precipitation in September in San Ignacio de VelascoSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%40%40%AugOctSep 114%Sep 114%Sep 3022%Sep 3022%Sep 1116%Sep 1116%Sep 2121%Sep 2121%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 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 September in San Ignacio de Velasco is increasing, starting the month at 1.3 inches, when it rarely exceeds 3.3 inches or falls below 0.2 inches, and ending the month at 2.2 inches, when it rarely exceeds 4.3 inches or falls below 0.7 inches.

Average Monthly Rainfall in September in San Ignacio de Velasco

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 snowfall.

Over the course of September in San Ignacio de Velasco, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 26 minutes, implying an average daily increase of 54 seconds, and weekly increase of 6 minutes, 18 seconds.

The shortest day of the month is September 1, with 11 hours, 48 minutes of daylight and the longest day is September 30, with 12 hours, 14 minutes of daylight.

Hours of Daylight and Twilight in September in San Ignacio de Velasco

Hours of Daylight and Twilight in September in San Ignacio de VelascoSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrAugOctSep 2212 hr, 6 minSep 2212 hr, 6 mindaydaydaydaynightSep 111 hr, 48 minSep 111 hr, 48 min
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 latest sunrise of the month in San Ignacio de Velasco is 6:09 AM on September 1 and the earliest sunrise is 23 minutes earlier at 5:46 AM on September 30.

The earliest sunset is 5:57 PM on September 1 and the latest sunset is 3 minutes later at 6:00 PM on September 30.

Daylight saving time is not observed in San Ignacio de Velasco during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 5:28 AM and sets 13 hours, 6 minutes later, at 6:35 PM, while on June 20, the shortest day of the year, it rises at 6:30 AM and sets 11 hours, 9 minutes later, at 5:40 PM.

Sunrise & Sunset with Twilight in September in San Ignacio de Velasco

Sunrise & Sunset with Twilight in September in San Ignacio de VelascoSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMAugOct5:46 AM5:46 AMSep 306:00 PMSep 306:00 PM6:09 AM6:09 AMSep 15:57 PMSep 15:57 PM6:01 AM6:01 AMSep 115:58 PMSep 115:58 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of September. 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 figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in September in San Ignacio de Velasco

Solar Elevation and Azimuth in September in San Ignacio de VelascoSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMAugOct00101020202030304040505050606070800001010202030303040405050606070
northeastsouthwest
Solar elevation and azimuth over the course of September 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for September 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in September in San Ignacio de Velasco

Moon Rise, Set & Phases in September in San Ignacio de VelascoSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAugOctAug 47:14 AMAug 47:14 AMAug 192:26 PMAug 192:26 PMSep 29:56 PMSep 29:56 PMSep 1710:35 PMSep 1710:35 PMOct 22:50 PMOct 22:50 PMOct 177:27 AMOct 177:27 AM6:39 AM6:39 AM6:12 PM6:12 PM6:02 PM6:02 PM7:00 AM7:00 AM5:55 AM5:55 AM5:47 PM5:47 PM5:44 PM5:44 PM6:15 AM6:15 AM5:35 AM5:35 AM6:03 PM6:03 PM5:24 PM5:24 PM5:29 AM5:29 AM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.
Sep 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
2%5:19 AMENE4:58 PMWNW-11:09 AMN249,072 mi
2
0%5:55 AMENE5:47 PMW-11:51 AMN250,491 mi
3
0%6:29 AME6:34 PMW-12:31 PMN251,551 mi
4
2%7:01 AME7:20 PMW-1:10 PMN252,209 mi
5
6%7:33 AME8:06 PMW-1:48 PMN252,403 mi
6
12%8:05 AME8:52 PMWSW-2:27 PMN252,058 mi
7
19%8:39 AMESE9:41 PMWSW-3:08 PMN251,100 mi
8
27%9:16 AMESE10:32 PMWSW-3:52 PMS249,470 mi
9
36%9:57 AMESE11:26 PMWSW-4:40 PMS247,145 mi
10
46%10:43 AMESE--5:32 PMS244,154 mi
11
50%-12:23 AMWSW11:35 AMESE6:27 PMS240,596 mi
12
68%-1:20 AMWSW12:32 PMESE7:25 PMS236,657 mi
13
78%-2:17 AMWSW1:34 PMESE8:24 PMS232,606 mi
14
87%-3:11 AMWSW2:37 PMESE9:22 PMS228,781 mi
15
94%-4:02 AMWSW3:41 PMESE10:17 PMN225,546 mi
16
99%-4:49 AMWSW4:43 PMESE11:10 PMN223,236 mi
17
100%-5:33 AMW5:44 PME--
18
100%-6:15 AMW6:45 PME12:01 AMN222,101 mi
19
98%-6:58 AMW7:46 PMENE12:52 AMN222,257 mi
20
93%-7:42 AMWNW8:48 PMENE1:44 AMN223,663 mi
21
86%-8:28 AMWNW9:52 PMENE2:38 AMN226,134 mi
22
76%-9:19 AMWNW10:56 PMENE3:35 AMN229,378 mi
23
65%-10:14 AMWNW11:59 PMENE4:35 AMN233,057 mi
24
50%-11:11 AMWNW-5:35 AMN236,841 mi
25
43%12:57 AMENE12:10 PMWNW-6:34 AMN240,454 mi
26
33%1:50 AMENE1:08 PMWNW-7:29 AMN243,699 mi
27
23%2:37 AMENE2:03 PMWNW-8:21 AMN246,461 mi
28
16%3:19 AMENE2:55 PMWNW-9:07 AMN248,692 mi
29
9%3:56 AMENE3:44 PMWNW-9:51 AMN250,392 mi
30
4%4:31 AME4:31 PMW-10:31 AMN251,586 mi

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 San Ignacio de Velasco is very rapidly increasing during September, rising from 13% to 36% over the course of the month.

For reference, on February 18, the muggiest day of the year, there are muggy conditions 96% of the time, while on August 1, the least muggy day of the year, there are muggy conditions 5% of the time.

Humidity Comfort Levels in September in San Ignacio de Velasco

Humidity Comfort Levels in September in San Ignacio de VelascoSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%AugOctSep 113%Sep 113%Sep 3036%Sep 3036%Sep 1117%Sep 1117%Sep 2127%Sep 2127%oppressiveoppressivemuggymuggyhumidhumidcomfortablecomfortabledrydry
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.

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 Ignacio de Velasco is essentially constant during September, remaining within 0.2 miles per hour of 6.1 miles per hour throughout.

For reference, on September 8, the windiest day of the year, the daily average wind speed is 6.2 miles per hour, while on March 16, the calmest day of the year, the daily average wind speed is 4.4 miles per hour.

The highest daily average wind speed during September is 6.2 miles per hour on September 8.

Average Wind Speed in September in San Ignacio de Velasco

Average Wind Speed in September in San Ignacio de VelascoSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mphAugOctSep 86.2 mphSep 86.2 mphSep 305.9 mphSep 305.9 mph
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 San Ignacio de Velasco throughout September is predominantly from the north, with a peak proportion of 50% on September 30.

Wind Direction in September in San Ignacio de Velasco

Wind Direction in September in San Ignacio de VelascoSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%AugOctsoutheastnorthwest
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).

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 San Ignacio de Velasco 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 September in San Ignacio de Velasco

Time Spent in Various Temperature Bands and the Growing Season in September in San Ignacio de VelascoSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOct100%Sep 16100%Sep 16coolcomfortablewarmhotswelteringcold
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.

The average accumulated growing degree days in San Ignacio de Velasco are rapidly increasing during September, increasing by 811°F, from 1,500°F to 2,311°F, over the course of the month.

Growing Degree Days in September in San Ignacio de Velasco

Growing Degree Days in September in San Ignacio de VelascoSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930301,400°F1,400°F1,600°F1,600°F1,800°F1,800°F2,000°F2,000°F2,200°F2,200°F2,400°F2,400°FAugOctSep 11,500°FSep 11,500°FSep 302,311°FSep 302,311°FSep 111,775°FSep 111,775°FSep 212,054°FSep 212,054°F
The average growing degree days accumulated over the course of September, with 25th to 75th and 10th to 90th percentile bands.

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 San Ignacio de Velasco is essentially constant during September, remaining within 0.1 kWh of 5.4 kWh throughout.

Average Daily Incident Shortwave Solar Energy in September in San Ignacio de Velasco

Average Daily Incident Shortwave Solar Energy in September in San Ignacio de VelascoSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhAugOctSep 15.2 kWhSep 15.2 kWhSep 305.5 kWhSep 305.5 kWhSep 115.3 kWhSep 115.3 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.

For the purposes of this report, the geographical coordinates of San Ignacio de Velasco are -16.367 deg latitude, -60.950 deg longitude, and 1,263 ft elevation.

The topography within 2 miles of San Ignacio de Velasco contains only modest variations in elevation, with a maximum elevation change of 243 feet and an average elevation above sea level of 1,347 feet. Within 10 miles contains only modest variations in elevation (906 feet). Within 50 miles also contains very significant variations in elevation (1,722 feet).

The area within 2 miles of San Ignacio de Velasco is covered by trees (43%), grassland (18%), shrubs (16%), and water (12%), within 10 miles by trees (69%) and grassland (10%), and within 50 miles by trees (83%).

This report illustrates the typical weather in San Ignacio de Velasco, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

San Ignacio de Velasco is further than 200 kilometers from the nearest reliable weather station, so the weather-related data on this page were taken entirely from NASA's MERRA-2 satellite-era reanalysis . 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.

The temperature and dew point estimates are corrected for the difference between the reference elevation of the MERRA-2 grid cell and the elevation of San Ignacio de Velasco, according to the International Standard Atmosphere .

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

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 airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

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.

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