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Average Weather in São Miguel do Iguaçu Brazil

In São Miguel do Iguaçu, the summers are long, hot, and muggy; the winters are short and cool; and it is wet and partly cloudy year round. Over the course of the year, the temperature typically varies from 53°F to 89°F and is rarely below 40°F or above 95°F.

Based on the tourism score, the best times of year to visit São Miguel do Iguaçu for warm-weather activities are from mid March to early June and from early August to late October.

Climate Summary

hotwarmcomfortablewarmhotJanFebMarAprMayJunJulAugSepOctNovDec69%69%49%49%clearovercastprecipitation: 7.5 inprecipitation: 7.5 in3.3 in3.3 inmuggy: 82%muggy: 82%3%3%drydrytourism score: 6.5tourism score: 6.54.74.7
Click on each chart for more information.

Temperature

The hot season lasts for 4.6 months, from November 7 to March 25, with an average daily high temperature above 85°F. The hottest day of the year is January 14, with an average high of 89°F and low of 70°F.

The cool season lasts for 2.7 months, from May 14 to August 5, with an average daily high temperature below 75°F. The coldest day of the year is July 22, with an average low of 53°F and high of 72°F.

Average High and Low Temperature

Average High and Low Temperature in São Miguel do IguaçuhothotcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F10°F20°F30°F40°F50°F60°F70°F80°F90°F100°FJul 2272°FJul 2272°FJan 1489°FJan 1489°F53°F53°F70°F70°FNov 785°FNov 785°FMar 2585°FMar 2585°FMay 1475°FMay 1475°F65°F65°F67°F67°F58°F58°FLowHigh
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 São Miguel do IguaçuJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMcoolcoolcomfortablewarmwarmhothotcoldwarm
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.

Giyani, South Africa (5,255 miles away); Ta‘izz, Yemen (7,132 miles); and Rockhampton, Australia (8,694 miles) are the far-away foreign places with temperatures most similar to São Miguel do Iguaçu (view comparison).

Clouds

In São Miguel do Iguaçu, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.

The clearer part of the year in São Miguel do Iguaçu begins around March 7 and lasts for 7.0 months, ending around October 9. On August 27, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 69% of the time, and overcast or mostly cloudy 31% of the time.

The cloudier part of the year begins around October 9 and lasts for 5.0 months, ending around March 7. On February 8, the cloudiest day of the year, the sky is overcast or mostly cloudy 51% of the time, and clear, mostly clear, or partly cloudy 49% of the time.

Cloud Cover Categories

Cloud Cover Categories in São Miguel do IguaçuclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 2769%Aug 2769%Feb 849%Feb 849%Oct 959%Oct 959%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.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in São Miguel do Iguaçu varies throughout the year.

The wetter season lasts 7.3 months, from September 20 to April 29, with a greater than 38% chance of a given day being a wet day. The chance of a wet day peaks at 51% on February 13.

The drier season lasts 4.7 months, from April 29 to September 20. The smallest chance of a wet day is 25% on August 26.

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 51% on February 13.

Daily Chance of Precipitation

Daily Chance of Precipitation in São Miguel do IguaçuwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Feb 1351%Feb 1351%Aug 2625%Aug 2625%Jan 145%Jan 145%Apr 2938%Apr 2938%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. São Miguel do Iguaçu experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in São Miguel do Iguaçu. The most rain falls during the 31 days centered around October 15, with an average total accumulation of 7.5 inches.

The least rain falls around August 8, with an average total accumulation of 3.3 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 São Miguel do Iguaçu varies over the course of the year. In 2018, the shortest day is June 21, with 10 hours, 33 minutes of daylight; the longest day is December 21, with 13 hours, 43 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in São Miguel do IguaçuJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minSep 2212 hr, 7 minSep 2213 hr, 43 minDec 2113 hr, 43 minDec 2112 hr, 7 minMar 2012 hr, 7 minMar 2010 hr, 33 minJun 2110 hr, 33 minJun 21daydaynight
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 5:58 AM on October 20, and the latest sunrise is 1 hour, 26 minutes later at 7:24 AM on February 17. The earliest sunset is at 5:53 PM on June 8, and the latest sunset is 2 hours, 39 minutes later at 8:32 PM on January 12.

Daylight saving time (DST) is observed in São Miguel do Iguaçu during 2018, starting in the spring on October 21 and ending in the fall on February 17.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time in São Miguel do IguaçuJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMOct 205:58 AMOct 205:58 AM8:32 PMJan 128:32 PMJan 12Jun 85:53 PMJun 85:53 PM7:24 AMFeb 177:24 AMFeb 17DSTFeb 17DSTFeb 17Oct 21DSTOct 21DSTdaynightSolarMidnightSolarMidnightSolarNoonSunriseSunset
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.

São Miguel do Iguaçu experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 7.1 months, from October 5 to May 10, during which time the comfort level is muggy, oppressive, or miserable at least 23% of the time. The muggiest day of the year is February 9, with muggy conditions 82% of the time.

The least muggy day of the year is July 22, with muggy conditions 3% of the time.

Humidity Comfort Levels

Humidity Comfort Levels in São Miguel do IguaçumuggymuggyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jul 223%Jul 223%82%Feb 982%Feb 9Oct 523%Oct 523%May 1023%May 1023%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.

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 São Miguel do Iguaçu experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.4 months, from May 10 to November 22, with average wind speeds of more than 4.4 miles per hour. The windiest day of the year is September 8, with an average hourly wind speed of 5.0 miles per hour.

The calmer time of year lasts for 5.6 months, from November 22 to May 10. The calmest day of the year is March 3, with an average hourly wind speed of 3.9 miles per hour.

Average Wind Speed

Average Wind Speed in São Miguel do IguaçuwindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph1 mph2 mph3 mph4 mph5 mph6 mph7 mphSep 85.0 mphSep 85.0 mphMar 33.9 mphMar 33.9 mphMay 104.4 mphMay 104.4 mphNov 224.4 mphNov 224.4 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 São Miguel do Iguaçu varies throughout the year.

The wind is most often from the east for 9.2 months, from February 25 to December 1, with a peak percentage of 41% on August 9. The wind is most often from the north for 2.9 months, from December 1 to February 25, with a peak percentage of 38% on January 1.

Wind Direction

Wind Direction in São Miguel do IguaçuNENJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%southeastnorthwest
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).

Best Time of Year to Visit

To characterize how pleasant the weather is in São Miguel do Iguaçu 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 times of year to visit São Miguel do Iguaçu for general outdoor tourist activities are from mid March to early June and from early August to late October, with a peak score in the last week of April.

Tourism Score

Tourism Score in São Miguel do Iguaçubest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.56.54.74.76.46.45.65.6 precipitationprecipitationcloudscloudstourism 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 São Miguel do Iguaçu for hot-weather activities is from early November to early April, with a peak score in the third week of March.

Beach/Pool Score

Beach/Pool Score in São Miguel do Iguaçubest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.46.42.52.56.26.25.85.8 precipitationprecipitationcloudscloudstemperaturetemperaturebeach/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).

While it does not do so every year, freezing temperatures are seen in São Miguel do Iguaçu over some winters. The day least likely to be in the growing season is July 16, with a 79% chance.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in São Miguel do Iguaçugrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%90%Aug 490%Aug 490%Jun 2590%Jun 2579%Jul 1679%Jul 16Jan 16100%Jan 16100%coldcoolcomfortablewarmhotvery 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 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 São Miguel do Iguaçu should appear around July 8, only rarely appearing before July 6 or after July 12.

Growing Degree Days

Growing Degree Days in São Miguel do IguaçuJanFebMarAprMayJunJulAugSepOctNovDec0°F1,000°F2,000°F3,000°F4,000°F5,000°F6,000°F7,000°FJul 890°FJul 890°FSep 3900°FSep 3900°FOct 191,800°FOct 191,800°FJun 307,531°FJun 307,531°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 significant seasonal variation over the course of the year.

The brighter period of the year lasts for 3.4 months, from October 28 to February 9, with an average daily incident shortwave energy per square meter above 6.4 kWh. The brightest day of the year is December 4, with an average of 7.1 kWh.

The darker period of the year lasts for 2.7 months, from May 13 to August 5, with an average daily incident shortwave energy per square meter below 4.2 kWh. The darkest day of the year is June 25, with an average of 3.4 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in São Miguel do IguaçubrightbrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWh10 kWhDec 47.1 kWhDec 47.1 kWhJun 253.4 kWhJun 253.4 kWhFeb 96.4 kWhFeb 96.4 kWhMay 134.2 kWhMay 134.2 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 São Miguel do Iguaçu are -25.348 deg latitude, -54.238 deg longitude, and 988 ft elevation.

The topography within 2 miles of São Miguel do Iguaçu contains significant variations in elevation, with a maximum elevation change of 541 feet and an average elevation above sea level of 954 feet. Within 10 miles also contains significant variations in elevation (810 feet). Within 50 miles contains significant variations in elevation (2,274 feet).

The area within 2 miles of São Miguel do Iguaçu is covered by cropland (41%), shrubs (28%), trees (19%), and grassland (12%), within 10 miles by cropland (42%) and trees (23%), and within 50 miles by trees (44%) and cropland (26%).

Data Sources

This report illustrates the typical weather in São Miguel do Iguaçu, 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, Foz do Iguaçu / Cataratas International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of São Miguel do Iguaçu.

At a distance of 37 kilometers from São Miguel do Iguaçu, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.

The station records are corrected for the elevation difference between the station and São Miguel do Iguaçu according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.

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.