Climate averages 1991–2020
Grajaú weather
in January.
A hot, wet month: the 10th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a hot month in Grajaú: daytime highs average 29.3°C and nights cool to about 22.6°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 172 mm of rain on roughly 25 days, which makes January a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 25 min on an average January day.
The nearest other city in this atlas is Barra do Corda (105 km away). In January its highs average 29.4°C, about as warm as Grajaú, with 213 mm of rain.
Among the 448 cities listed in Brazil, Grajaú ranks joint 141st of 448 for the warmest January highs and 135th of 448 for the driest January (rainfall, lowest first). The mean January high of those 448 cities is 28.5°C; Grajaú is 0.9°C warmer than that mean.
From January to February, average highs fall by 0.1°C to 29.2°C, and monthly rainfall rises from 172 mm to 177 mm.
The annual picture
January 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
Grajaú climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 29.3°C22.6°C | 22.6°C | 172 | 24.7 | 12.412 h |
| February | 29.2°C22.6°C | 22.6°C | 177 | 24.0 | 12.312 h |
| March | 29.2°C22.6°C | 22.6°C | 188 | 26.1 | 12.112 h |
| April | 29.5°C22.6°C | 22.6°C | 132 | 20.4 | 12.012 h |
| May | 30.1°C22.3°C | 22.3°C | 64 | 10.5 | 11.912 h |
| June | 31.5°C22.1°C | 22.1°C | 8.4 | 1.6 | 11.812 h |
| July | 32.5°C22.2°C | 22.2°C | 4.7 | 0.8 | 11.812 h |
| August | 33.7°C22.6°C | 22.6°C | 1.9 | 0.3 | 11.912 h |
| September | 34.4°C23.5°C | 23.5°C | 8.9 | 1.7 | 12.112 h |
| October | 33.8°C24.1°C | 24.1°C | 32 | 5.3 | 12.212 h |
| November | 32.1°C23.7°C | 23.7°C | 78 | 11.9 | 12.412 h |
| December | 30.7°C23.2°C | 23.2°C | 135 | 17.8 | 12.512 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
January in nearby cities
- Barra do Corda in JanuaryBrazil · 105 kmHigh 29.4°C · Low 22.8°C · 213 mm rain
- Imperatriz in JanuaryBrazil · 153 kmHigh 29.2°C · Low 23.0°C · 207 mm rain
- Açailândia in JanuaryBrazil · 180 kmHigh 28.5°C · Low 22.0°C · 255 mm rain
- Balsas in JanuaryBrazil · 191 kmHigh 29.5°C · Low 22.2°C · 204 mm rain
- Bacabal in JanuaryBrazil · 232 kmHigh 30.3°C · Low 23.5°C · 249 mm rain
- Santa Inês in JanuaryBrazil · 254 kmHigh 30.2°C · Low 23.6°C · 253 mm rain
- Araguaína in JanuaryBrazil · 275 kmHigh 28.9°C · Low 22.1°C · 287 mm rain
- Codó in JanuaryBrazil · 292 kmHigh 30.4°C · Low 23.2°C · 226 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 Grajaú) is explained once on the Grajaú year overview and on the Sources, method and limits page.