Climate averages 1991–2020
Ceará-Mirim weather
in September.
A hot, very dry month: the 8th warmest and the joint 2nd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Ceará-Mirim: daytime highs average 29.0°C and nights cool to about 23.0°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 12 mm of rain on roughly 5 days, which makes September a very dry month (the joint 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 04 min on an average September day.
The nearest other city in this atlas is Macaíba (26 km away). In September its highs average 29.5°C, about as warm as Ceará-Mirim, with 31 mm of rain.
Among the 448 cities listed in Brazil, Ceará-Mirim ranks joint 152nd of 448 for the warmest September highs and joint 49th of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Ceará-Mirim is 1.5°C warmer than that mean.
From September to October, average highs rise by 0.8°C to 29.8°C, and monthly rainfall falls from 12 mm to 10 mm.
The annual picture
September 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
Ceará-Mirim climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.2°C24.4°C | 24.4°C | 51 | 14.5 | 12.412 h |
| February | 30.2°C24.4°C | 24.4°C | 65 | 15.7 | 12.312 h |
| March | 29.9°C24.3°C | 24.3°C | 99 | 20.4 | 12.112 h |
| April | 29.3°C24.2°C | 24.2°C | 113 | 20.2 | 12.012 h |
| May | 28.9°C23.9°C | 23.9°C | 85 | 15.4 | 11.912 h |
| June | 27.9°C23.1°C | 23.1°C | 75 | 14.5 | 11.812 h |
| July | 27.4°C22.4°C | 22.4°C | 61 | 12.1 | 11.812 h |
| August | 28.0°C22.4°C | 22.4°C | 21 | 7.1 | 11.912 h |
| September, selected | 29.0°C23.0°C | 23.0°C | 12 | 4.6 | 12.112 h |
| October | 29.8°C23.7°C | 23.7°C | 10 | 3.5 | 12.212 h |
| November | 30.2°C24.2°C | 24.2°C | 12 | 4.7 | 12.412 h |
| December | 30.3°C24.4°C | 24.4°C | 23 | 9.4 | 12.412 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
September in nearby cities
- Macaíba in SeptemberBrazil · 26 kmHigh 29.5°C · Low 22.9°C · 31 mm rain
- Natal in SeptemberBrazil · 30 kmHigh 28.1°C · Low 23.3°C · 31 mm rain
- Parnamirim in SeptemberBrazil · 36 kmHigh 28.5°C · Low 22.9°C · 18 mm rain
- Santa Rita in SeptemberBrazil · 172 kmHigh 28.2°C · Low 22.8°C · 34 mm rain
- João Pessoa in SeptemberBrazil · 176 kmHigh 27.4°C · Low 22.8°C · 37 mm rain
- Campina Grande in SeptemberBrazil · 184 kmHigh 27.9°C · Low 19.0°C · 13 mm rain
- Mossoró in SeptemberBrazil · 218 kmHigh 34.9°C · Low 23.1°C · 0.9 mm rain
- Goiana in SeptemberBrazil · 219 kmHigh 27.9°C · Low 22.3°C · 36 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 Ceará-Mirim) is explained once on the Ceará-Mirim year overview and on the Sources, method and limits page.