Parnaíba weather in September
In September, Parnaíba sees average daytime highs of 35°C and overnight lows near 25°C, with 1 mm of rain across 0.2 wet days and about 12 hours of daylight. It is the 1st-warmest and 12th-wettest month of the year here.
Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 84% of the time in September, and the air most often feels muggy.
Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Parnaíba's 1st-clearest and 2nd-windiest month. For the whole year in context, see Parnaíba's year-round climate.
- Daytime high
- 35°
- 1st warmest
- Overnight low
- 25°
- 8th coldest
- Rainfall
- 1 mm
- 0.2 wet days
- Daylight
- 12 hours
- 5:42 AM – 5:41 PM
- Cloud cover
- 25%
- 1st clearest
- Wind
- 21 km/h
- 2nd windiest
- Solar energy
- 6.88 kWh/m²
- Travel score
- 3.5
- out of 10
Temperature in September
Day-to-day highs hold fairly steady near 35°C through the month.
A typical September day in Parnaíba reaches about 35°C in the afternoon and slips back to 25°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 34°C and 36°C. Set against its neighbours, September runs on par with August and on par with October.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 |
| Avg low (°C) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 35 | 25 |
| 2 | 35 | 25 |
| 3 | 35 | 25 |
| 4 | 35 | 25 |
| 5 | 35 | 25 |
| 6 | 35 | 25 |
| 7 | 35 | 25 |
| 8 | 35 | 25 |
| 9 | 35 | 25 |
| 10 | 35 | 25 |
| 11 | 35 | 25 |
| 12 | 35 | 25 |
| 13 | 35 | 25 |
| 14 | 35 | 25 |
| 15 | 35 | 25 |
| 16 | 35 | 25 |
| 17 | 35 | 25 |
| 18 | 35 | 25 |
| 19 | 35 | 25 |
| 20 | 35 | 25 |
| 21 | 35 | 25 |
| 22 | 35 | 25 |
| 23 | 35 | 25 |
| 24 | 35 | 25 |
| 25 | 35 | 25 |
| 26 | 35 | 25 |
| 27 | 35 | 25 |
| 28 | 35 | 25 |
| 29 | 35 | 25 |
| 30 | 35 | 25 |
How September really feels in Parnaíba
Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Parnaíba weather by month
How September compares with the rest of the year at a glance. September is the 1st-warmest and 12th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 32° / 25° | 129 | 20 | 12.1 | 3.1 |
| Feb | 31° / 25° | 170 | 23 | 12.1 | 2.9 |
| Mar | 30° / 25° | 265 | 27.7 | 12 | 2.8 |
| Apr | 30° / 25° | 268 | 25.9 | 11.9 | 2.9 |
| May | 31° / 25° | 148 | 18 | 11.9 | 3.6 |
| Jun | 32° / 25° | 31 | 7.1 | 11.8 | 4.4 |
| Jul | 33° / 24° | 16 | 2.7 | 11.8 | 4.3 |
| Aug | 34° / 24° | 3 | 0.5 | 11.9 | 3.8 |
| Sep | 35° / 25° | 1 | 0.2 | 12 | 3.5 |
| Oct | 35° / 25° | 6 | 0.7 | 12.1 | 3.4 |
| Nov | 34° / 25° | 7 | 1.7 | 12.1 | 3.5 |
| Dec | 33° / 25° | 35 | 7.2 | 12.2 | 3.5 |
Cloud cover in September
The sky is clear or mostly clear about 84% of the time in September, the clearest month of the year.
Beyond those clear spells, partly cloudy skies cover about 11% of September, with mostly cloudy or overcast conditions the remaining 5%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 95 | 95 | 95 | 95 | 95 | 95 | 95 | 94 | 94 | 94 | 94 | 94 | 94 | 94 | 94 | 95 | 95 | 95 | 95 | 95 | 95 | 95 | 95 | 95 | 94 | 94 | 94 | 94 | 94 | 94 |
| Cloudier (%) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 95 | 5 |
| 2 | 95 | 5 |
| 3 | 95 | 5 |
| 4 | 95 | 5 |
| 5 | 95 | 5 |
| 6 | 95 | 5 |
| 7 | 95 | 5 |
| 8 | 94 | 6 |
| 9 | 94 | 6 |
| 10 | 94 | 6 |
| 11 | 94 | 6 |
| 12 | 94 | 6 |
| 13 | 94 | 6 |
| 14 | 94 | 6 |
| 15 | 94 | 6 |
| 16 | 95 | 5 |
| 17 | 95 | 5 |
| 18 | 95 | 5 |
| 19 | 95 | 5 |
| 20 | 95 | 5 |
| 21 | 95 | 5 |
| 22 | 95 | 5 |
| 23 | 95 | 5 |
| 24 | 95 | 5 |
| 25 | 94 | 6 |
| 26 | 94 | 6 |
| 27 | 94 | 6 |
| 28 | 94 | 6 |
| 29 | 94 | 6 |
| 30 | 94 | 6 |
Chance of precipitation in September
Parnaíba gets around 1 mm of rain over 0.2 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 1% and peaks near 1% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Rain chance (%) | |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 1 |
| 11 | 1 |
| 12 | 1 |
| 13 | 1 |
| 14 | 1 |
| 15 | 1 |
| 16 | 1 |
| 17 | 1 |
| 18 | 1 |
| 19 | 1 |
| 20 | 1 |
| 21 | 1 |
| 22 | 1 |
| 23 | 1 |
| 24 | 1 |
| 25 | 1 |
| 26 | 1 |
| 27 | 1 |
| 28 | 1 |
| 29 | 1 |
| 30 | 1 |
Humidity in September
Most of September feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the muggy band about 67% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Humid (%) | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Muggy (%) | 72 | 73 | 74 | 75 | 74 | 75 | 75 | 75 | 74 | 74 | 73 | 72 | 71 | 69 | 68 | 67 | 66 | 65 | 64 | 62 | 61 | 60 | 59 | 59 | 58 | 57 | 56 | 56 | 55 | 55 |
| Oppressive (%) | 28 | 27 | 26 | 25 | 25 | 24 | 24 | 24 | 25 | 25 | 26 | 27 | 28 | 30 | 31 | 32 | 34 | 35 | 36 | 38 | 39 | 40 | 41 | 41 | 42 | 43 | 44 | 44 | 45 | 45 |
| Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|
| 1 | 0 | 72 | 28 |
| 2 | 0 | 73 | 27 |
| 3 | 0 | 74 | 26 |
| 4 | 0 | 75 | 25 |
| 5 | 1 | 74 | 25 |
| 6 | 1 | 75 | 24 |
| 7 | 1 | 75 | 24 |
| 8 | 1 | 75 | 24 |
| 9 | 1 | 74 | 25 |
| 10 | 1 | 74 | 25 |
| 11 | 1 | 73 | 26 |
| 12 | 1 | 72 | 27 |
| 13 | 1 | 71 | 28 |
| 14 | 1 | 69 | 30 |
| 15 | 1 | 68 | 31 |
| 16 | 1 | 67 | 32 |
| 17 | 0 | 66 | 34 |
| 18 | 0 | 65 | 35 |
| 19 | 0 | 64 | 36 |
| 20 | 0 | 62 | 38 |
| 21 | 0 | 61 | 39 |
| 22 | 0 | 60 | 40 |
| 23 | 0 | 59 | 41 |
| 24 | 0 | 59 | 41 |
| 25 | 0 | 58 | 42 |
| 26 | 0 | 57 | 43 |
| 27 | 0 | 56 | 44 |
| 28 | 0 | 56 | 44 |
| 29 | 0 | 55 | 45 |
| 30 | 0 | 55 | 45 |
Wind in September
Winds average 21 km/h in September.
Across September, daily wind ranges from about 20 km/h on the calmest days to 22 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 20 | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 |
| Feels | light breeze | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 20 | light breeze |
| 2 | 20 | breezy |
| 3 | 20 | breezy |
| 4 | 20 | breezy |
| 5 | 20 | breezy |
| 6 | 20 | breezy |
| 7 | 21 | breezy |
| 8 | 21 | breezy |
| 9 | 21 | breezy |
| 10 | 21 | breezy |
| 11 | 21 | breezy |
| 12 | 21 | breezy |
| 13 | 21 | breezy |
| 14 | 21 | breezy |
| 15 | 21 | breezy |
| 16 | 21 | breezy |
| 17 | 21 | breezy |
| 18 | 21 | breezy |
| 19 | 21 | breezy |
| 20 | 22 | breezy |
| 21 | 22 | breezy |
| 22 | 22 | breezy |
| 23 | 22 | breezy |
| 24 | 22 | breezy |
| 25 | 22 | breezy |
| 26 | 22 | breezy |
| 27 | 22 | breezy |
| 28 | 22 | breezy |
| 29 | 22 | breezy |
| 30 | 22 | breezy |
Sunrise & sunset in September
Daylight runs from about 11 h 54 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 6 minutes over September. Sunrise moves from 5:48 AM to 5:36 AM, and sunset from 5:45 PM to 5:37 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.9 | 11.9 | 11.9 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Sunrise (AM) | 5:48 | 5:48 | 5:48 | 5:47 | 5:47 | 5:46 | 5:46 | 5:46 | 5:45 | 5:45 | 5:44 | 5:44 | 5:43 | 5:43 | 5:42 | 5:42 | 5:41 | 5:41 | 5:41 | 5:40 | 5:40 | 5:39 | 5:39 | 5:38 | 5:38 | 5:37 | 5:37 | 5:37 | 5:36 | 5:36 |
| Sunset (PM) | 5:45 | 5:45 | 5:45 | 5:44 | 5:44 | 5:44 | 5:44 | 5:43 | 5:43 | 5:43 | 5:42 | 5:42 | 5:42 | 5:42 | 5:41 | 5:41 | 5:41 | 5:40 | 5:40 | 5:40 | 5:40 | 5:39 | 5:39 | 5:39 | 5:38 | 5:38 | 5:38 | 5:38 | 5:37 | 5:37 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.9 | 5:48 | 5:45 |
| 2 | 11.9 | 5:48 | 5:45 |
| 3 | 11.9 | 5:48 | 5:45 |
| 4 | 12.0 | 5:47 | 5:44 |
| 5 | 12.0 | 5:47 | 5:44 |
| 6 | 12.0 | 5:46 | 5:44 |
| 7 | 12.0 | 5:46 | 5:44 |
| 8 | 12.0 | 5:46 | 5:43 |
| 9 | 12.0 | 5:45 | 5:43 |
| 10 | 12.0 | 5:45 | 5:43 |
| 11 | 12.0 | 5:44 | 5:42 |
| 12 | 12.0 | 5:44 | 5:42 |
| 13 | 12.0 | 5:43 | 5:42 |
| 14 | 12.0 | 5:43 | 5:42 |
| 15 | 12.0 | 5:42 | 5:41 |
| 16 | 12.0 | 5:42 | 5:41 |
| 17 | 12.0 | 5:41 | 5:41 |
| 18 | 12.0 | 5:41 | 5:40 |
| 19 | 12.0 | 5:41 | 5:40 |
| 20 | 12.0 | 5:40 | 5:40 |
| 21 | 12.0 | 5:40 | 5:40 |
| 22 | 12.0 | 5:39 | 5:39 |
| 23 | 12.0 | 5:39 | 5:39 |
| 24 | 12.0 | 5:38 | 5:39 |
| 25 | 12.0 | 5:38 | 5:38 |
| 26 | 12.0 | 5:37 | 5:38 |
| 27 | 12.0 | 5:37 | 5:38 |
| 28 | 12.0 | 5:37 | 5:38 |
| 29 | 12.0 | 5:36 | 5:37 |
| 30 | 12.0 | 5:36 | 5:37 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 6.88 kWh/m².
For context, solar energy here swings from a low near 4.93 kWh/m² to a high of 6.98 kWh/m² in October across the year — September's 6.88 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.9 | 6.9 | 6.9 | 6.9 | 6.9 | 6.9 | 6.9 | 6.9 | 6.9 | 6.9 | 7.0 | 7.0 | 7.0 | 7.0 | 7.0 | 7.0 | 7.0 | 7.0 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.7 | Intense |
| 2 | 6.7 | Intense |
| 3 | 6.7 | Intense |
| 4 | 6.7 | Intense |
| 5 | 6.7 | Intense |
| 6 | 6.8 | Intense |
| 7 | 6.8 | Intense |
| 8 | 6.8 | Intense |
| 9 | 6.8 | Intense |
| 10 | 6.8 | Intense |
| 11 | 6.8 | Intense |
| 12 | 6.8 | Intense |
| 13 | 6.9 | Intense |
| 14 | 6.9 | Intense |
| 15 | 6.9 | Intense |
| 16 | 6.9 | Intense |
| 17 | 6.9 | Intense |
| 18 | 6.9 | Intense |
| 19 | 6.9 | Intense |
| 20 | 6.9 | Intense |
| 21 | 6.9 | Intense |
| 22 | 6.9 | Intense |
| 23 | 7.0 | Intense |
| 24 | 7.0 | Intense |
| 25 | 7.0 | Intense |
| 26 | 7.0 | Intense |
| 27 | 7.0 | Intense |
| 28 | 7.0 | Intense |
| 29 | 7.0 | Intense |
| 30 | 7.0 | Intense |
Hazard calendar for Parnaíba
None of Parnaíba's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Parnaíba's monsoon runs January–May, when most of the year's rain falls.
Is September a good time to visit Parnaíba?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is a weaker month for outdoor sightseeing in Parnaíba. The water and warmth also suit a beach or pool day.
What to pack for Parnaíba in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Parnaíba sees daytime highs around 35°C and nights near 25°C. Pack light clothes and sun protection. Worth having: a windbreaker.
Sea temperature near Parnaíba in September
The nearest coast averages about 27°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 17 km away) is warmest in May at about 29°C and coldest in September near 27°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 28 | 28 | 29 | 29 | 29 | 29 | 28 | 27 | 27 | 27 | 28 | 28 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm | Warm | Warm | Warm | Warm | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Tropical |
| Feb | 28 | Tropical |
| Mar | 29 | Tropical |
| Apr | 29 | Tropical |
| May | 29 | Tropical |
| Jun | 29 | Tropical |
| Jul | 28 | Warm |
| Aug | 27 | Warm |
| Sep | 27 | Warm |
| Oct | 27 | Warm |
| Nov | 28 | Warm |
| Dec | 28 | Tropical |
UV index in Parnaíba in September
Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Parnaíba peaks around March 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 10 (extreme).
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) | 13 | 14 | 15 | 14 | 12 | 10 | 10 | 10 | 12 | 12 | 11 | 11 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 14 | Extreme |
| Mar | 15 | Extreme |
| Apr | 14 | Extreme |
| May | 12 | Extreme |
| Jun | 10 | Extreme |
| Jul | 10 | Extreme |
| Aug | 10 | Extreme |
| Sep | 12 | Extreme |
| Oct | 12 | Extreme |
| Nov | 11 | Extreme |
| Dec | 11 | Extreme |
Air quality in Parnaíba in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.
Air quality in Parnaíba is worst in December — around 18 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (August, 6 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 12 | 15 | 13 | 11 | 8 | 7 | 9 | 6 | 7 | 10 | 16 | 18 |
| Level | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Good | Good | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 12 | Moderate |
| Feb | 15 | Moderate |
| Mar | 13 | Moderate |
| Apr | 11 | Good |
| May | 8 | Good |
| Jun | 7 | Good |
| Jul | 9 | Good |
| Aug | 6 | Good |
| Sep | 7 | Good |
| Oct | 10 | Good |
| Nov | 16 | Moderate |
| Dec | 18 | Moderate |
Where is Parnaíba?
Parnaíba sits at 2.9°S, 41.8°W, 9 m above sea level, in Brazil. The nearest listed city is Ilha Grande, 7.0 km away.
Topography around Parnaíba
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Parnaíba.
Within 3 km, the terrain around Parnaíba has only modest variations in elevation — a maximum elevation change of 28 m around an average of 7 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 52 m; within 80 km, large variations in elevation — a maximum elevation change of 919 m.
The land around Parnaíba is covered by grassland (46%) and artificial surfaces (31%) within 3 km, grassland (37%) and trees (29%) within 16 km, and trees (39%) and water (33%) 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 Parnaíba (-2.9047°, -41.7767°, elevation 9 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).