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September Weather in Dois Riachos Brazil

Daily high temperatures increase by 4°F, from 87°F to 92°F, rarely falling below 84°F or exceeding 96°F.

Daily low temperatures are around 67°F, rarely falling below 63°F or exceeding 71°F.

For reference, on November 28, the hottest day of the year, temperatures in Dois Riachos typically range from 71°F to 96°F, while on July 31, the coldest day of the year, they range from 65°F to 84°F.

Average High and Low Temperature in September in Dois Riachos

Average High and Low Temperature in September in Dois RiachosSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303060°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°F90°F90°F95°F95°F100°F100°FAugOctSep 187°FSep 187°F66°F66°FSep 3092°FSep 3092°F68°F68°FSep 1189°FSep 1189°F67°F67°FSep 2191°FSep 2191°F68°F68°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 Dois Riachos

Average Hourly Temperature in September in Dois RiachosSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMAugOctcomfortablecomfortablewarmhot
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.

Mérida, Mexico (4,140 miles away) and Cauto Cristo, Cuba (3,385 miles) are the far-away foreign places with temperatures most similar to Dois Riachos (view comparison).

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The month of September in Dois Riachos experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 27% throughout the month.

The clearest day of the month is September 19, with clear, mostly clear, or partly cloudy conditions 74% of the time.

For reference, on December 5, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 60%, while on July 12, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 76%.

Cloud Cover Categories in September in Dois Riachos

Cloud Cover Categories in September in Dois RiachosSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOctSep 172%Sep 172%Sep 3071%Sep 3071%Sep 1174%Sep 1174%Sep 2173%Sep 2173%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 Dois Riachos, the chance of a wet day over the course of September is decreasing, starting the month at 13% and ending it at 8%.

For reference, the year's highest daily chance of a wet day is 35% on June 18, and its lowest chance is 5% on October 30.

Probability of Precipitation in September in Dois Riachos

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 Dois Riachos is essentially constant, remaining about 0.6 inches throughout, and rarely exceeding 1.7 inches or falling below -0.0 inches.

Average Monthly Rainfall in September in Dois Riachos

Average Monthly Rainfall in September in Dois RiachosSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 in2.5 in2.5 in3.0 in3.0 inAugOctSep 10.7 inSep 10.7 inSep 300.6 inSep 300.6 inSep 110.6 inSep 110.6 inSep 210.6 inSep 210.6 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 snowfall.

Over the course of September in Dois Riachos, the length of the day is essentially constant. The shortest day of the month is September 1, with 11 hours, 56 minutes of daylight and the longest day is September 30, with 12 hours, 11 minutes of daylight.

Hours of Daylight and Twilight in September in Dois Riachos

Hours of Daylight and Twilight in September in Dois RiachosSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrAugOctSep 2212 hr, 6 minSep 2212 hr, 6 mindaydaydaydaynightSep 111 hr, 56 minSep 111 hr, 56 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 Dois Riachos is 5:30 AM on September 1 and the earliest sunrise is 17 minutes earlier at 5:12 AM on September 30.

The latest sunset is 5:26 PM on September 1 and the earliest sunset is 2 minutes, 40 seconds earlier at 5:23 PM on September 30.

Daylight saving time is not observed in Dois Riachos during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 5:06 AM and sets 12 hours, 41 minutes later, at 5:47 PM, while on June 20, the shortest day of the year, it rises at 5:42 AM and sets 11 hours, 35 minutes later, at 5:17 PM.

Sunrise & Sunset with Twilight in September in Dois Riachos

Sunrise & Sunset with Twilight in September in Dois RiachosSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PMAugOct5:12 AM5:12 AMSep 305:23 PMSep 305:23 PM5:30 AM5:30 AMSep 15:26 PMSep 15:26 PM5:24 AM5:24 AMSep 115:25 PMSep 115:25 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 Dois Riachos

Solar Elevation and Azimuth in September in Dois RiachosSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMAugOct00101020202030304040505050606070800001010202030303040405050606060707080
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 Dois Riachos

Moon Rise, Set & Phases in September in Dois RiachosSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAugOctAug 48:14 AMAug 48:14 AMAug 193:26 PMAug 193:26 PMSep 210:56 PMSep 210:56 PMSep 1711:35 PMSep 1711:35 PMOct 23:50 PMOct 23:50 PMOct 178:27 AMOct 178:27 AM5:49 AM5:49 AM5:44 PM5:44 PM5:30 PM5:30 PM6:16 AM6:16 AM5:10 AM5:10 AM5:14 PM5:14 PM5:07 PM5:07 PM5:37 AM5:37 AM4:58 AM4:58 AM5:22 PM5:22 PM4:42 PM4:42 PM4:56 AM4:56 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%4:30 AMENE4:28 PMWNW-10:30 AMN248,966 mi
2
0%5:10 AMENE5:14 PMW-11:13 AMN250,407 mi
3
0%5:47 AME5:58 PMW-11:53 AMN251,492 mi
4
2%6:22 AME6:41 PMW-12:31 PMN252,179 mi
5
6%6:57 AME7:24 PMW-1:10 PMN252,406 mi
6
11%7:32 AME8:07 PMWSW-1:49 PMS252,099 mi
7
18%8:09 AMESE8:53 PMWSW-2:30 PMS251,184 mi
8
27%8:49 AMESE9:41 PMWSW-3:13 PMS249,600 mi
9
36%9:32 AMESE10:32 PMWSW-4:01 PMS247,321 mi
10
46%10:20 AMESE11:27 PMWSW-4:52 PMS244,371 mi
11
50%11:13 AMESE--5:48 PMS240,846 mi
12
67%-12:24 AMWSW12:10 PMESE6:46 PMS236,924 mi
13
77%-1:22 AMWSW1:10 PMESE7:45 PMS232,871 mi
14
86%-2:18 AMWSW2:11 PMESE8:43 PMS229,019 mi
15
94%-3:12 AMWSW3:11 PMESE9:38 PMS225,734 mi
16
98%-4:02 AMWSW4:10 PMESE10:31 PMS223,354 mi
17
100%-4:50 AMW5:07 PME11:23 PMN222,137 mi
18
100%-5:37 AMW6:04 PME--
19
98%-6:23 AMW7:01 PME12:13 AMN222,207 mi
20
94%-7:11 AMWNW7:59 PMENE1:05 AMN223,535 mi
21
86%-8:01 AMWNW9:00 PMENE1:59 AMN225,943 mi
22
77%-8:54 AMWNW10:01 PMENE2:56 AMN229,147 mi
23
66%-9:51 AMWNW11:02 PMENE3:55 AMN232,807 mi
24
50%-10:49 AMWNW-4:56 AMN236,593 mi
25
44%12:01 AMENE11:47 AMWNW-5:55 AMN240,224 mi
26
33%12:56 AMENE12:43 PMWNW-6:50 AMN243,498 mi
27
24%1:45 AMENE1:36 PMWNW-7:42 AMN246,294 mi
28
16%2:30 AMENE2:26 PMWNW-8:29 AMN248,561 mi
29
9%3:11 AMENE3:12 PMWNW-9:12 AMN250,295 mi
30
4%3:48 AME3:56 PMW-9:52 AMN251,522 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 Dois Riachos is gradually increasing during September, rising from 59% to 63% over the course of the month.

For reference, on May 10, the muggiest day of the year, there are muggy conditions 91% of the time, while on August 25, the least muggy day of the year, there are muggy conditions 58% of the time.

Humidity Comfort Levels in September in Dois Riachos

Humidity Comfort Levels in September in Dois RiachosSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%AugOctSep 159%Sep 159%Sep 3063%Sep 3063%Sep 1160%Sep 1160%Sep 2161%Sep 2161%muggymuggyhumidhumidcomfortablecomfortableoppressiveoppressive
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 Dois Riachos is gradually increasing during September, increasing from 11.3 miles per hour to 12.0 miles per hour over the course of the month.

For reference, on November 6, the windiest day of the year, the daily average wind speed is 12.6 miles per hour, while on April 15, the calmest day of the year, the daily average wind speed is 9.8 miles per hour.

Average Wind Speed in September in Dois Riachos

Average Wind Speed in September in Dois RiachosSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mphAugOctSep 111.3 mphSep 111.3 mphSep 3012.0 mphSep 3012.0 mphSep 1611.7 mphSep 1611.7 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 Dois Riachos throughout September is predominantly from the east, with a peak proportion of 95% on September 30.

Wind Direction in September in Dois Riachos

Wind Direction in September in Dois RiachosSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%AugOcteast
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 Dois Riachos 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 Dois Riachos

Time Spent in Various Temperature Bands and the Growing Season in September in Dois RiachosSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%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 16comfortablewarmhotcoolsweltering
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 Dois Riachos are rapidly increasing during September, increasing by 754°F, from 1,460°F to 2,214°F, over the course of the month.

Growing Degree Days in September in Dois Riachos

Growing Degree Days in September in Dois RiachosSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930301,500°F1,500°F1,600°F1,600°F1,700°F1,700°F1,800°F1,800°F1,900°F1,900°F2,000°F2,000°F2,100°F2,100°F2,200°F2,200°F2,300°F2,300°FAugOctSep 11,460°FSep 11,460°FSep 302,214°FSep 302,214°FSep 111,713°FSep 111,713°FSep 211,973°FSep 211,973°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 Dois Riachos is gradually increasing during September, rising by 0.7 kWh, from 6.7 kWh to 7.4 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in September in Dois Riachos

Average Daily Incident Shortwave Solar Energy in September in Dois RiachosSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhAugOctSep 16.7 kWhSep 16.7 kWhSep 307.4 kWhSep 307.4 kWhSep 117.0 kWhSep 117.0 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 Dois Riachos are -9.392 deg latitude, -37.101 deg longitude, and 781 ft elevation.

The topography within 2 miles of Dois Riachos contains only modest variations in elevation, with a maximum elevation change of 390 feet and an average elevation above sea level of 820 feet. Within 10 miles contains only modest variations in elevation (1,755 feet). Within 50 miles contains very significant variations in elevation (3,586 feet).

The area within 2 miles of Dois Riachos is covered by cropland (47%), grassland (21%), trees (16%), and shrubs (16%), within 10 miles by cropland (45%) and grassland (20%), and within 50 miles by cropland (26%) and trees (24%).

This report illustrates the typical weather in Dois Riachos, 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, Aracaju Aeroporto, in our network suitable to be used as a proxy for the historical temperature and dew point records of Dois Riachos.

At a distance of 177 kilometers from Dois Riachos, 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 Dois Riachos to the nearest station, increasing from 0% at 150 kilometers to 100% at 200 kilometers. In this case, the MERRA-2 weight is 35%, making the weight assigned to the weather station 65%.

Other Data

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.

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 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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