Climate averages 1991–2020
Castanhal weather
in March.
A hot, very wet month: one of the coolest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
March is a hot month in Castanhal: daytime highs average 28.9°C and nights cool to about 22.9°C. By daytime temperature it is one of the coolest months of the year.
Expect about 456 mm of rain on roughly 31 days, which makes March a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 07 min on an average March day.
The nearest other city in this atlas is Santa Isabel do Pará (26 km away). In March its highs average 29.0°C, about as warm as Castanhal, with 511 mm of rain.
Among the 448 cities listed in Brazil, Castanhal ranks joint 147th of 448 for the warmest March highs and 441st of 448 for the driest March (rainfall, lowest first). The mean March high of those 448 cities is 27.9°C; Castanhal is 0.9°C warmer than that mean.
From March to April, average highs rise by 0.1°C to 28.9°C, and monthly rainfall falls from 456 mm to 427 mm.
The annual picture
March 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
Castanhal climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.8°C23.3°C | 23.3°C | 269 | 27.0 | 12.212 h |
| February | 29.0°C23.0°C | 23.0°C | 357 | 27.2 | 12.212 h |
| March, selected | 28.9°C22.9°C | 22.9°C | 456 | 30.5 | 12.112 h |
| April | 28.9°C23.0°C | 23.0°C | 427 | 29.6 | 12.112 h |
| May | 29.4°C23.0°C | 23.0°C | 278 | 27.7 | 12.112 h |
| June | 29.7°C22.7°C | 22.7°C | 120 | 21.4 | 12.012 h |
| July | 30.0°C22.6°C | 22.6°C | 91 | 18.1 | 12.112 h |
| August | 31.2°C23.0°C | 23.0°C | 51 | 12.7 | 12.112 h |
| September | 32.3°C23.4°C | 23.4°C | 34 | 8.6 | 12.112 h |
| October | 33.1°C23.7°C | 23.7°C | 34 | 8.0 | 12.112 h |
| November | 32.9°C24.0°C | 24.0°C | 49 | 8.7 | 12.212 h |
| December | 31.8°C24.0°C | 24.0°C | 118 | 17.2 | 12.212 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
March in nearby cities
- Santa Isabel do Pará in MarchBrazil · 26 kmHigh 29.0°C · Low 23.0°C · 511 mm rain
- Marituba in MarchBrazil · 47 kmHigh 29.1°C · Low 23.6°C · 511 mm rain
- Ananindeua in MarchBrazil · 50 kmHigh 28.9°C · Low 23.7°C · 511 mm rain
- Belém in MarchBrazil · 67 kmHigh 28.5°C · Low 24.1°C · 404 mm rain
- Barcarena in MarchBrazil · 81 kmHigh 28.5°C · Low 23.9°C · 393 mm rain
- Capanema in MarchBrazil · 84 kmHigh 28.6°C · Low 23.0°C · 382 mm rain
- Moju in MarchBrazil · 114 kmHigh 29.2°C · Low 23.1°C · 465 mm rain
- Abaetetuba in MarchBrazil · 116 kmHigh 28.7°C · Low 23.8°C · 393 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 Castanhal) is explained once on the Castanhal year overview and on the Sources, method and limits page.