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April Weather in Santa Isabel do Rio Negro Brazil

Daily high temperatures are around 83°F, rarely falling below 80°F or exceeding 85°F.

Daily low temperatures are around 74°F, rarely falling below 73°F or exceeding 76°F. The highest daily average low temperature is 74°F on April 10.

For reference, on September 20, the hottest day of the year, temperatures in Santa Isabel do Rio Negro typically range from 74°F to 84°F, while on July 12, the coldest day of the year, they range from 73°F to 82°F.

Average High and Low Temperature in April in Santa Isabel do Rio Negro

Average High and Low Temperature in April in Santa Isabel do Rio NegroApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303072°F72°F74°F74°F76°F76°F78°F78°F80°F80°F82°F82°F84°F84°F86°F86°F88°F88°F90°F90°F92°F92°FMarMayApr 183°FApr 183°F74°F74°FApr 3083°FApr 3083°F74°F74°FApr 1183°FApr 1183°F74°F74°FApr 2183°FApr 2183°F74°F74°FNowNow
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 April. 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 April in Santa Isabel do Rio Negro

Average Hourly Temperature in April in Santa Isabel do Rio NegroApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMMarMayNowNowcomfortablewarmwarm
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.

Limot, Philippines (11,547 miles away) is the far-away foreign place with temperatures most similar to Santa Isabel do Rio Negro (view comparison).

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The month of April in Santa Isabel do Rio Negro experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 84% to 78%.

The clearest day of the month is April 30, with clear, mostly clear, or partly cloudy conditions 22% of the time.

For reference, on December 10, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 85%, while on July 21, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 50%.

Cloud Cover Categories in April in Santa Isabel do Rio Negro

Cloud Cover Categories in April in Santa Isabel do Rio NegroApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%MarMayApr 116%Apr 116%Apr 3022%Apr 3022%Apr 1116%Apr 1116%Apr 2119%Apr 2119%NowNowmostly clearpartly cloudymostly cloudyovercastclear
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 Santa Isabel do Rio Negro, the chance of a wet day over the course of April is rapidly increasing, starting the month at 74% and ending it at 82%.

For reference, the year's highest daily chance of a wet day is 82% on May 10, and its lowest chance is 52% on October 15.

Probability of Precipitation in April in Santa Isabel do Rio Negro

Probability of Precipitation in April in Santa Isabel do Rio NegroApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%MarMayApr 174%Apr 174%Apr 3082%Apr 3082%Apr 1176%Apr 1176%Apr 2180%Apr 2180%NowNowrain
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 April in Santa Isabel do Rio Negro is rapidly increasing, starting the month at 8.6 inches, when it rarely exceeds 12.0 inches or falls below 5.1 inches, and ending the month at 10.0 inches, when it rarely exceeds 14.2 inches or falls below 6.4 inches.

Average Monthly Rainfall in April in Santa Isabel do Rio Negro

Average Monthly Rainfall in April in Santa Isabel do Rio NegroApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in12 in12 in14 in14 in16 in16 inMarMayApr 18.6 inApr 18.6 inApr 3010.0 inApr 3010.0 inApr 119.2 inApr 119.2 inApr 219.7 inApr 219.7 inNowNow
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 April in Santa Isabel do Rio Negro, the length of the day is essentially constant. The shortest day of the month is April 30, with 12 hours, 6 minutes of daylight and the longest day is April 1, with 12 hours, 6 minutes of daylight.

Hours of Daylight and Twilight in April in Santa Isabel do Rio Negro

Hours of Daylight and Twilight in April in Santa Isabel do Rio NegroApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrMarMaydaydaydaydaynightApr 112 hr, 6 minApr 112 hr, 6 minApr 3012 hr, 6 minApr 3012 hr, 6 minApr 1612 hr, 6 minApr 1612 hr, 6 minNowNow
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 Santa Isabel do Rio Negro is 6:20 AM on April 1 and the earliest sunrise is 6 minutes earlier at 6:14 AM on April 30.

The latest sunset is 6:26 PM on April 1 and the earliest sunset is 7 minutes earlier at 6:20 PM on April 30.

Daylight saving time is not observed in Santa Isabel do Rio Negro during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 6:13 AM and sets 12 hours, 9 minutes later, at 6:22 PM, while on June 20, the shortest day of the year, it rises at 6:18 AM and sets 12 hours, 6 minutes later, at 6:24 PM.

Sunrise & Sunset with Twilight in April in Santa Isabel do Rio Negro

Sunrise & Sunset with Twilight in April in Santa Isabel do Rio NegroApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930302 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMMarMay6:14 AM6:14 AMApr 306:20 PMApr 306:20 PM6:20 AM6:20 AMApr 16:26 PMApr 16:26 PM6:17 AM6:17 AMApr 116:23 PMApr 116:23 PMSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of April. 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 April in Santa Isabel do Rio Negro

Solar Elevation and Azimuth in April in Santa Isabel do Rio NegroApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMMarMay0010102020203030404050505060607070800001010202030303040405050606060707080NowNow
northeastsouthwest
Solar elevation and azimuth over the course of April 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 April 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 April in Santa Isabel do Rio Negro

Moon Rise, Set & Phases in April in Santa Isabel do Rio NegroApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMMarMayMar 105:01 AMMar 105:01 AMMar 253:01 AMMar 253:01 AMApr 82:22 PMApr 82:22 PMApr 237:50 PMApr 237:50 PMMay 711:23 PMMay 711:23 PMMay 239:54 AMMay 239:54 AM6:36 AM6:36 AM7:03 PM7:03 PM6:13 PM6:13 PM6:33 AM6:33 AM6:04 AM6:04 AM6:29 PM6:29 PM6:12 PM6:12 PM6:35 AM6:35 AM5:34 AM5:34 AM6:00 PM6:00 PM5:39 PM5:39 PM6:06 AM6:06 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.
Apr 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
50%-12:09 PMWSW-5:53 AMS237,936 mi
2
47%12:36 AMESE1:08 PMWSW-6:53 AMS234,585 mi
3
35%1:35 AMESE2:06 PMWSW-7:52 AMS231,211 mi
4
24%2:33 AMESE3:02 PMWSW-8:49 AMS228,073 mi
5
14%3:28 AMESE3:55 PMWSW-9:43 AMS225,469 mi
6
7%4:21 AME4:47 PMW-10:35 AMS223,693 mi
7
2%5:12 AME5:38 PMW-11:25 AMN222,986 mi
8
0%6:04 AME6:29 PMW-12:16 PMN223,478 mi
9
1%6:56 AMENE7:22 PMWNW-1:08 PMN225,163 mi
10
6%7:50 AMENE8:17 PMWNW-2:02 PMN227,889 mi
11
13%8:47 AMENE9:14 PMWNW-2:59 PMN231,383 mi
12
21%9:45 AMENE10:13 PMWNW-3:58 PMN235,304 mi
13
31%10:44 AMENE11:11 PMWNW-4:57 PMN239,292 mi
14
41%11:41 AMENE--5:54 PMN243,026 mi
15
50%-12:07 AMWNW12:35 PMENE6:48 PMN246,258 mi
16
62%-12:59 AMWNW1:25 PMENE7:37 PMN248,823 mi
17
71%-1:47 AMWNW2:10 PMENE8:22 PMN250,640 mi
18
79%-2:31 AMWNW2:53 PMENE9:04 PMN251,699 mi
19
87%-3:13 AMWNW3:33 PME9:43 PMN252,042 mi
20
92%-3:53 AMW4:12 PME10:22 PMN251,753 mi
21
97%-4:32 AMW4:51 PME11:01 PMS250,931 mi
22
99%-5:11 AMW5:31 PME11:40 PMS249,682 mi
23
100%-5:52 AMWSW6:12 PMESE--
24
100%-6:35 AMWSW6:57 PMESE12:22 AMS248,102 mi
25
99%-7:21 AMWSW7:45 PMESE1:08 AMS246,267 mi
26
95%-8:12 AMWSW8:37 PMESE1:57 AMS244,234 mi
27
89%-9:06 AMWSW9:33 PMESE2:51 AMS242,035 mi
28
82%-10:03 AMWSW10:31 PMESE3:48 AMS239,696 mi
29
73%-11:02 AMWSW11:29 PMESE4:47 AMS237,243 mi
30
62%-11:59 AMWSW-5:45 AMS234,727 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 Santa Isabel do Rio Negro is essentially constant during April, remaining around 100% throughout.

For reference, on January 1, the muggiest day of the year, there are muggy conditions 100% of the time, while on June 16, the least muggy day of the year, there are muggy conditions 100% of the time.

Humidity Comfort Levels in April in Santa Isabel do Rio Negro

Humidity Comfort Levels in April in Santa Isabel do Rio NegroApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%MarMayApr 16100%Apr 16100%Apr 1100%Apr 1100%Apr 30100%Apr 30100%NowNowmiserablemiserableoppressiveoppressive
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 Santa Isabel do Rio Negro is essentially constant during April, remaining around 1.7 miles per hour throughout.

For reference, on July 22, the windiest day of the year, the daily average wind speed is 1.8 miles per hour, while on October 16, the calmest day of the year, the daily average wind speed is 1.6 miles per hour.

The highest daily average wind speed during April is 1.8 miles per hour on April 3.

Average Wind Speed in April in Santa Isabel do Rio Negro

Average Wind Speed in April in Santa Isabel do Rio NegroApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300.0 mph0.0 mph0.5 mph0.5 mph1.0 mph1.0 mph1.5 mph1.5 mph2.0 mph2.0 mph2.5 mph2.5 mphMarMayApr 31.8 mphApr 31.8 mphApr 301.7 mphApr 301.7 mphApr 161.7 mphApr 161.7 mphNowNow
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 Santa Isabel do Rio Negro throughout April is predominantly from the east, with a peak proportion of 57% on April 7.

Wind Direction in April in Santa Isabel do Rio Negro

Wind Direction in April in Santa Isabel do Rio NegroApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%MarMayNowNowsoutheastnorthwest
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 Santa Isabel do Rio Negro 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 April in Santa Isabel do Rio Negro

Time Spent in Various Temperature Bands and the Growing Season in April in Santa Isabel do Rio NegroApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%MarMay100%Apr 16100%Apr 16NowNowcomfortablewarmhot
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 Santa Isabel do Rio Negro are rapidly increasing during April, increasing by 821°F, from 7,812°F to 8,633°F, over the course of the month.

Growing Degree Days in April in Santa Isabel do Rio Negro

Growing Degree Days in April in Santa Isabel do Rio NegroApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930307,800°F7,800°F8,000°F8,000°F8,200°F8,200°F8,400°F8,400°F8,600°F8,600°FMarMayApr 17,812°FApr 17,812°FApr 308,633°FApr 308,633°FApr 118,093°FApr 118,093°FApr 218,374°FApr 218,374°FNowNow
The average growing degree days accumulated over the course of April, 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 Santa Isabel do Rio Negro is essentially constant during April, remaining around 4.4 kWh throughout.

The highest average daily incident shortwave solar energy during April is 4.5 kWh on April 4.

Average Daily Incident Shortwave Solar Energy in April in Santa Isabel do Rio Negro

Average Daily Incident Shortwave Solar Energy in April in Santa Isabel do Rio NegroApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWhMarMayApr 44.5 kWhApr 44.5 kWhApr 304.5 kWhApr 304.5 kWhApr 164.4 kWhApr 164.4 kWhNowNow
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 Santa Isabel do Rio Negro are -0.414 deg latitude, -65.019 deg longitude, and 148 ft elevation.

The topography within 2 miles of Santa Isabel do Rio Negro contains only modest variations in elevation, with a maximum elevation change of 144 feet and an average elevation above sea level of 148 feet. Within 10 miles also contains only modest variations in elevation (223 feet). Within 50 miles contains only modest variations in elevation (2,064 feet).

The area within 2 miles of Santa Isabel do Rio Negro is covered by trees (62%) and water (28%), within 10 miles by trees (84%) and water (14%), and within 50 miles by trees (95%).

This report illustrates the typical weather in Santa Isabel do Rio Negro, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Santa Isabel do Rio Negro 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 Santa Isabel do Rio Negro, 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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