Climate and average weather in São João do Piauí
In São João do Piauí, the weather is sweltering, wet, and mostly clear and remarkably steady, with daytime highs holding near sweltering levels all year. The wettest stretch peaks around January.
Over the course of the year, the temperature in São João do Piauí typically varies from 22°C to 36°C, and is rarely below 20°C or above 38°C. October is the hottest month of the year, while March is the coldest.
Based on the travel score, the best time of year to visit São João do Piauí for warm-weather activities is from mid April to mid August.
- Hottest
- Oct
- 36°
- Coldest
- Mar
- 23°
- Wettest
- Jan
- 147 mm
- Driest
- Aug
- 0 mm
- Rain / yr
- 673 mm
- 80 wet days
- Daylight
- 11.5–12.5 h
- shortest–longest
- Elevation
- 219 m
- 8.4°S
- Clearest
- Aug
- 28% cloud
São João do Piauí is settlement in Brazil.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
São João do Piauí weather by month, at a glance
The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.
Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around mid April to mid August.
Temperature through the year
Daily average highs and lows in São João do Piauí, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
Temperatures in São João do Piauí stay fairly even through the year, without a distinct hot or cool season. The warmest month is October, with an average high of 36°C and low of 25°C; the coolest is March, with an average low of 23°C and high of 32°C.
Days typically run about 10°C warmer than nights, with the widest day–night swing (around 12°C) in August.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 32 | 32 | 32 | 32 | 33 | 33 | 33 | 34 | 36 | 36 | 35 | 34 |
| Avg low (°C) | 24 | 23 | 23 | 23 | 24 | 23 | 22 | 22 | 24 | 25 | 25 | 25 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 32 | 24 |
| Feb | 32 | 23 |
| Mar | 32 | 23 |
| Apr | 32 | 23 |
| May | 33 | 24 |
| Jun | 33 | 23 |
| Jul | 33 | 22 |
| Aug | 34 | 22 |
| Sep | 36 | 24 |
| Oct | 36 | 25 |
| Nov | 35 | 25 |
| Dec | 34 | 25 |
How hot and cold São João do Piauí really feels
The felt-temperature range through the year — heat index on the day's high (summer humidity), wind chill on the night's low (winter wind). The dashed lines are the plain thermometer; the gap is how much hotter or colder it really feels.
On the hottest afternoons, once humidity is folded in, São João do Piauí feels like about 36°C (around October 29). Nearly every day a year carries some heat stress, peaking in October.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels-like high (°C) | 35 | 35 | 35 | 35 | 34 | 33 | 33 | 34 | 36 | 36 | 36 | 36 |
| Air high (°C) | 32 | 32 | 32 | 32 | 33 | 33 | 33 | 34 | 36 | 36 | 35 | 34 |
| Feels-like low (°C) | 24 | 23 | 23 | 23 | 24 | 23 | 22 | 22 | 23 | 25 | 25 | 25 |
| Air low (°C) | 24 | 23 | 23 | 23 | 24 | 23 | 22 | 22 | 24 | 25 | 25 | 25 |
| Feels-like high (°C) | Air high (°C) | Feels-like low (°C) | Air low (°C) | |
|---|---|---|---|---|
| Jan | 35 | 32 | 24 | 24 |
| Feb | 35 | 32 | 23 | 23 |
| Mar | 35 | 32 | 23 | 23 |
| Apr | 35 | 32 | 23 | 23 |
| May | 34 | 33 | 24 | 24 |
| Jun | 33 | 33 | 23 | 23 |
| Jul | 33 | 33 | 22 | 22 |
| Aug | 34 | 34 | 22 | 22 |
| Sep | 36 | 36 | 23 | 24 |
| Oct | 36 | 36 | 25 | 25 |
| Nov | 36 | 35 | 25 | 25 |
| Dec | 36 | 34 | 25 | 25 |
Average hourly temperature in São João do Piauí
A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on October afternoons, near 36°C, and coldest before dawn in March, near 23°C.
São João do Piauí weather by month
Every month at a glance. Click a month for its detailed page.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 32° / 24° | 147 | 16.5 | 12.4 | 3.2 |
| Feb | 32° / 23° | 139 | 15 | 12.3 | 3.4 |
| Mar | 32° / 23° | 139 | 16.3 | 12.1 | 3.5 |
| Apr | 32° / 23° | 74 | 9.9 | 11.8 | 3.8 |
| May | 33° / 24° | 22 | 3 | 11.6 | 4.0 |
| Jun | 33° / 23° | 1 | 0.3 | 11.5 | 4.6 |
| Jul | 33° / 22° | 1 | 0.2 | 11.6 | 4.6 |
| Aug | 34° / 22° | 0 | 0 | 11.7 | 3.8 |
| Sep | 36° / 24° | 2 | 0.2 | 12 | 2.8 |
| Oct | 36° / 25° | 18 | 2.1 | 12.2 | 2.4 |
| Nov | 35° / 25° | 55 | 6.3 | 12.4 | 2.8 |
| Dec | 34° / 25° | 75 | 9.8 | 12.5 | 3.2 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
São João do Piauí gets about 673 mm of precipitation a year. On a typical day the chance of rain is some rain, but that rises and falls sharply with the seasons.
The wetter season lasts 5.2 months, from around Nov 18 to Apr 24, peaking in January at about 57% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 25.
January is the wettest month by volume, with 147 mm over about 17 wet days; August is the driest, with 0 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 52 | 54 | 53 | 33 | 10 | 1 | 1 | 0 | 1 | 7 | 20 | 33 |
| Rain days | 17 | 15 | 16 | 10 | 3 | 0 | 0 | 0 | 0 | 2 | 6 | 10 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 52 | 17 |
| Feb | 54 | 15 |
| Mar | 53 | 16 |
| Apr | 33 | 10 |
| May | 10 | 3 |
| Jun | 1 | 0 |
| Jul | 1 | 0 |
| Aug | 0 | 0 |
| Sep | 1 | 0 |
| Oct | 7 | 2 |
| Nov | 20 | 6 |
| Dec | 33 | 10 |
Monthly rainfall
Over a full year, São João do Piauí collects about 673 mm of rain across 80 wet days — roughly 56 mm in an average month.
It doesn’t fall evenly. January is the wettest month with 147 mm, while August is the driest at just 0 mm. The three wettest months alone bring about 63% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 147 | 139 | 139 | 74 | 22 | 1 | 1 | 0 | 2 | 18 | 55 | 75 |
| Rain days | 17 | 15 | 16 | 10 | 3 | 0 | 0 | 0 | 0 | 2 | 6 | 10 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 147 | 17 |
| Feb | 139 | 15 |
| Mar | 139 | 16 |
| Apr | 74 | 10 |
| May | 22 | 3 |
| Jun | 1 | 0 |
| Jul | 1 | 0 |
| Aug | 0 | 0 |
| Sep | 2 | 0 |
| Oct | 18 | 2 |
| Nov | 55 | 6 |
| Dec | 75 | 10 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In São João do Piauí, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.
The clearer part of the year begins around May 25 and lasts for 5.5 months, ending around November 8. The clearest month is September, when the sky is clear, mostly clear, or partly cloudy 87% of the time on average.
The cloudier part of the year begins around November 9 and lasts for 6.5 months, ending around May 24. The cloudiest month is February, when it is overcast or mostly cloudy 64% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 37 | 36 | 40 | 47 | 54 | 66 | 74 | 82 | 87 | 78 | 54 | 47 |
| Cloudier (%) | 63 | 64 | 60 | 53 | 46 | 34 | 26 | 18 | 13 | 22 | 46 | 53 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 37 | 63 |
| Feb | 36 | 64 |
| Mar | 40 | 60 |
| Apr | 47 | 53 |
| May | 54 | 46 |
| Jun | 66 | 34 |
| Jul | 74 | 26 |
| Aug | 82 | 18 |
| Sep | 87 | 13 |
| Oct | 78 | 22 |
| Nov | 54 | 46 |
| Dec | 47 | 53 |
Daylight, sunrise and sunset
Hours of daylight through the year, with sunrise and sunset times.
The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around January 1, brings about 12 h 30 min of light; the shortest, around June 1, only 11 h 30 min — a swing of roughly 1 hour.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.4 | 12.3 | 12.1 | 11.8 | 11.6 | 11.5 | 11.6 | 11.7 | 12.0 | 12.2 | 12.4 | 12.5 |
| Sunrise (AM) | 5:45 | 5:55 | 5:57 | 5:55 | 5:57 | 6:04 | 6:08 | 6:01 | 5:45 | 5:28 | 5:23 | 5:31 |
| Sunset (PM) | 6:11 | 6:12 | 6:00 | 5:44 | 5:34 | 5:35 | 5:41 | 5:45 | 5:42 | 5:40 | 5:46 | 6:00 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 12.4 | 5:45 | 6:11 |
| Feb | 12.3 | 5:55 | 6:12 |
| Mar | 12.1 | 5:57 | 6:00 |
| Apr | 11.8 | 5:55 | 5:44 |
| May | 11.6 | 5:57 | 5:34 |
| Jun | 11.5 | 6:04 | 5:35 |
| Jul | 11.6 | 6:08 | 5:41 |
| Aug | 11.7 | 6:01 | 5:45 |
| Sep | 12.0 | 5:45 | 5:42 |
| Oct | 12.2 | 5:28 | 5:40 |
| Nov | 12.4 | 5:23 | 5:46 |
| Dec | 12.5 | 5:31 | 6:00 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
São João do Piauí averages about 12 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 5 and 23 days.
The sunnier stretch runs 5.3 months, from around May 28 to Nov 4. The sunniest month is September, with roughly 22 sunny days (bright).
The greyest month is February, down near 5 sunny days — about 76% fewer than the September peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 6 | 5 | 6 | 8 | 11 | 15 | 18 | 22 | 22 | 18 | 10 | 8 |
| Sky | Gloomy | Gloomy | Gloomy | Gloomy | Mixed | Mixed | Bright | Bright | Bright | Bright | Mixed | Mixed |
| Sunny days | Sky | |
|---|---|---|
| Jan | 6 | Gloomy |
| Feb | 5 | Gloomy |
| Mar | 6 | Gloomy |
| Apr | 8 | Gloomy |
| May | 11 | Mixed |
| Jun | 15 | Mixed |
| Jul | 18 | Bright |
| Aug | 22 | Bright |
| Sep | 22 | Bright |
| Oct | 18 | Bright |
| Nov | 10 | Mixed |
| Dec | 8 | Mixed |
Humidity comfort
Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.
Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.
In São João do Piauí, how humid it feels changes dramatically over the year.
The more humid part of the year lasts 7.2 months, from around November 15 to June 22. The muggiest month is February, when the air feels humid, muggy or worse about 99% of the time.
The most comfortable stretch runs from around June 23 to November 14, and August is the most comfortable month — the air is dry or comfortable 76% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 0 | 0 | 0 | 0 | 0 | 1 | 5 | 9 | 12 | 9 | 3 | 0 |
| Comfortable (%) | 3 | 1 | 1 | 2 | 6 | 20 | 49 | 66 | 60 | 43 | 22 | 6 |
| Humid (%) | 15 | 7 | 5 | 13 | 40 | 67 | 44 | 24 | 27 | 33 | 28 | 25 |
| Muggy (%) | 27 | 26 | 24 | 37 | 42 | 13 | 2 | 0 | 1 | 10 | 31 | 38 |
| Oppressive (%) | 54 | 65 | 70 | 47 | 12 | 1 | 0 | 0 | 0 | 5 | 16 | 30 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| Jan | 0 | 3 | 15 | 27 | 54 |
| Feb | 0 | 1 | 7 | 26 | 65 |
| Mar | 0 | 1 | 5 | 24 | 70 |
| Apr | 0 | 2 | 13 | 37 | 47 |
| May | 0 | 6 | 40 | 42 | 12 |
| Jun | 1 | 20 | 67 | 13 | 1 |
| Jul | 5 | 49 | 44 | 2 | 0 |
| Aug | 9 | 66 | 24 | 0 | 0 |
| Sep | 12 | 60 | 27 | 1 | 0 |
| Oct | 9 | 43 | 33 | 10 | 5 |
| Nov | 3 | 22 | 28 | 31 | 16 |
| Dec | 0 | 6 | 25 | 38 | 30 |
Wind
Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.
This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.
Across the year, average wind speed in São João do Piauí is typically calm, near 11 km/h, and varies moderately with the seasons.
The windier part of the year lasts 5.7 months, from around May 10 to Oct 31. The windiest month is August, averaging about 16 km/h (light breeze).
The calmer part of the year runs from around Nov 1 to May 9, with March the calmest month at about 7 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 8 | 7 | 7 | 9 | 12 | 15 | 16 | 16 | 15 | 13 | 10 | 9 |
| Feels | calm | calm | calm | calm | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 8 | calm |
| Feb | 7 | calm |
| Mar | 7 | calm |
| Apr | 9 | calm |
| May | 12 | light breeze |
| Jun | 15 | light breeze |
| Jul | 16 | light breeze |
| Aug | 16 | light breeze |
| Sep | 15 | light breeze |
| Oct | 13 | light breeze |
| Nov | 10 | calm |
| Dec | 9 | calm |
Hazard calendar for São João do Piauí
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
São João do Piauí's rainy season runs December–April, when most of the year's rain falls.
Best time to visit São João do Piauí
To characterize how pleasant the weather is in São João do Piauí throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around late April, São João do Piauí is still near the start of its best-weather window — great conditions with the peak-season crowds not yet at full swing.
Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.
The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit São João do Piauí for general outdoor tourist activities is from mid April to mid August, with a peak score in the last week of June.
The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel score (0–10) | 3.2 | 3.4 | 3.5 | 3.8 | 4.1 | 4.5 | 4.6 | 3.8 | 2.8 | 2.4 | 2.8 | 3.2 |
| Rating | poor | poor | fair | fair | fair | fair | fair | fair | poor | poor | poor | poor |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 3.2 | poor |
| Feb | 3.4 | poor |
| Mar | 3.5 | fair |
| Apr | 3.8 | fair |
| May | 4.1 | fair |
| Jun | 4.5 | fair |
| Jul | 4.6 | fair |
| Aug | 3.8 | fair |
| Sep | 2.8 | poor |
| Oct | 2.4 | poor |
| Nov | 2.8 | poor |
| Dec | 3.2 | poor |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit São João do Piauí for hot-weather activities is from mid April to mid September, with a peak score in the last week of July.
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).
What to pack for São João do Piauí, by month
Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.
São João do Piauí packs about the same all year — highs hold near 36°C. Across the year the things worth having are light clothes, sun protection and rain gear.
In October, São João do Piauí sees daytime highs around 36°C and nights near 25°C. Pack light clothes and sun protection.
UV index (midday) in São João do Piauí by month
Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.
Under clear skies, the midday UV index in São João do Piauí peaks around March 11 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 14 at about 10 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 14 | 15 | 15 | 13 | 10 | 10 | 10 | 10 | 12 | 12 | 12 | 12 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 15 | Extreme |
| Mar | 15 | Extreme |
| Apr | 13 | Extreme |
| May | 10 | Extreme |
| Jun | 10 | Very high |
| Jul | 10 | Very high |
| Aug | 10 | Very high |
| Sep | 12 | Extreme |
| Oct | 12 | Extreme |
| Nov | 12 | Extreme |
| Dec | 12 | Extreme |
Average hourly UV index in São João do Piauí
Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.
The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
UV falls off far faster than brightness as the sun drops, so even in March the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 6.5 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV ≥ 3 (h/day) | 8.5 | 8.5 | 8.5 | 8 | 7.5 | 7 | 7 | 7 | 8 | 8 | 8 | 8 |
| UV ≥ 6 (h/day) | 6.5 | 6.5 | 6.5 | 6 | 5.5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 8.5 | 6.5 |
| Feb | 8.5 | 6.5 |
| Mar | 8.5 | 6.5 |
| Apr | 8 | 6 |
| May | 7.5 | 5.5 |
| Jun | 7 | 5 |
| Jul | 7 | 5 |
| Aug | 7 | 5 |
| Sep | 8 | 6 |
| Oct | 8 | 6 |
| Nov | 8 | 6 |
| Dec | 8 | 6 |
Growing season
São João do Piauí is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Frost nights | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 100 | 0 |
| Feb | 100 | 0 |
| Mar | 100 | 0 |
| Apr | 100 | 0 |
| May | 100 | 0 |
| Jun | 100 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 100 | 0 |
| Oct | 100 | 0 |
| Nov | 100 | 0 |
| Dec | 100 | 0 |
Growing degree days
Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. São João do Piauí banks about 6,727 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around October.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 556 | 487 | 538 | 534 | 567 | 530 | 537 | 559 | 588 | 638 | 602 | 589 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 556 |
| Feb | 487 |
| Mar | 538 |
| Apr | 534 |
| May | 567 |
| Jun | 530 |
| Jul | 537 |
| Aug | 559 |
| Sep | 588 |
| Oct | 638 |
| Nov | 602 |
| Dec | 589 |
Solar energy
Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.
Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.
São João do Piauí receives about 5.7 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 4.8 and 6.9 kWh/m².
The brighter stretch of the year lasts 5.0 months, from around Aug 2 to Jan 1. The brightest month is October, averaging about 6.8 kWh/m² (intense).
The dimmest month is June, down near 4.8 kWh/m² — roughly 29% less than the October peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.5 | 5.5 | 5.3 | 5.3 | 5.0 | 4.8 | 5.2 | 6.1 | 6.7 | 6.8 | 6.2 | 5.9 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Intense | Intense | Intense | Intense | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 5.5 | Bright |
| Feb | 5.5 | Bright |
| Mar | 5.3 | Bright |
| Apr | 5.3 | Bright |
| May | 5.0 | Bright |
| Jun | 4.8 | Bright |
| Jul | 5.2 | Bright |
| Aug | 6.1 | Intense |
| Sep | 6.7 | Intense |
| Oct | 6.8 | Intense |
| Nov | 6.2 | Intense |
| Dec | 5.9 | Bright |
Where is São João do Piauí?
São João do Piauí sits at 8.4°S, 42.2°W, 219 m above sea level, in Brazil. The nearest listed city is Canto do Buriti, 82 km away.
Topography around São João do Piauí
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São João do Piauí.
Within 3 km, the terrain around São João do Piauí has only modest variations in elevation — a maximum elevation change of 90 m around an average of 227 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 204 m; within 80 km, significant variations in elevation — a maximum elevation change of 518 m.
The land around São João do Piauí is covered by shrubs (49%) and grassland (28%) within 3 km, shrubs (88%) within 16 km, and shrubs (94%) within 80 km.
Brazil travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / N
- 127 / 220 V · 60 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $10,713
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Safe drinking water
- 89%
- of population, 2024
- Homicide rate
- 19.3
- per 100k, 2023
- Road deaths
- 16
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 482
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for São João do Piauí (-8.3581°, -42.2467°, elevation 219 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).