Climate averages 1991–2020
Parnaíba weather
in October.
A hot, very dry month: the 2nd warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a hot month in Parnaíba: daytime highs average 33.6°C and nights cool to about 25.2°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 5.6 mm of rain on fewer than one day, which makes October a very dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 10 min on an average October day.
The nearest other city in this atlas is Tianguá (127 km away). In October its highs average 31.3°C, 2.2°C cooler than Parnaíba, with 11 mm of rain.
Among the 448 cities listed in Brazil, Parnaíba ranks joint 32nd of 448 for the warmest October highs and 15th of 448 for the driest October (rainfall, lowest first). The mean October high of those 448 cities is 28.3°C; Parnaíba is 5.3°C warmer than that mean.
From October to November, average highs fall by 0.5°C to 33.1°C, and monthly rainfall rises from 5.6 mm to 7.4 mm.
The annual picture
October in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Parnaíba climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.1°C24.9°C | 24.9°C | 129 | 20.0 | 12.312 h |
| February | 29.4°C24.7°C | 24.7°C | 172 | 23.3 | 12.212 h |
| March | 29.1°C24.6°C | 24.6°C | 265 | 27.7 | 12.112 h |
| April | 29.2°C24.7°C | 24.7°C | 268 | 25.9 | 12.012 h |
| May | 30.0°C24.9°C | 24.9°C | 148 | 17.9 | 12.012 h |
| June | 31.0°C24.9°C | 24.9°C | 31 | 7.0 | 12.012 h |
| July | 32.2°C24.8°C | 24.8°C | 16 | 2.7 | 12.012 h |
| August | 33.4°C24.8°C | 24.8°C | 2.6 | 0.5 | 12.012 h |
| September | 33.8°C25.0°C | 25.0°C | 1.1 | 0.2 | 12.112 h |
| October, selected | 33.6°C25.2°C | 25.2°C | 5.6 | 0.7 | 12.212 h |
| November | 33.1°C25.5°C | 25.5°C | 7.4 | 1.6 | 12.212 h |
| December | 32.1°C25.5°C | 25.5°C | 35 | 7.1 | 12.312 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
October in nearby cities
- Tianguá in OctoberBrazil · 127 kmHigh 31.3°C · Low 20.0°C · 11 mm rain
- Sobral in OctoberBrazil · 181 kmHigh 35.8°C · Low 24.2°C · 2.8 mm rain
- Chapadinha in OctoberBrazil · 199 kmHigh 35.5°C · Low 24.6°C · 12 mm rain
- Itapipoca in OctoberBrazil · 253 kmHigh 34.1°C · Low 24.3°C · 5.1 mm rain
- São José de Ribamar in OctoberBrazil · 257 kmHigh 30.0°C · Low 25.9°C · 15 mm rain
- Teresina in OctoberBrazil · 268 kmHigh 36.9°C · Low 24.5°C · 15 mm rain
- Caxias in OctoberBrazil · 279 kmHigh 36.3°C · Low 24.4°C · 14 mm rain
- Crateús in OctoberBrazil · 281 kmHigh 35.0°C · Low 23.1°C · 9.6 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Parnaíba) is explained once on the Parnaíba year overview and on the Sources, method and limits page.