Climate averages 1991–2020
Grajaú weather
in May.
A hot, moderately wet month: the 8th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Grajaú: daytime highs average 30.1°C and nights cool to about 22.3°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 64 mm of rain on roughly 11 days, which makes May a moderately wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 51 min on an average May day.
The nearest other city in this atlas is Barra do Corda (105 km away). In May its highs average 30.0°C, about as warm as Grajaú, with 84 mm of rain.
Among the 448 cities listed in Brazil, Grajaú ranks joint 25th of 448 for the warmest May highs and joint 209th of 448 for the driest May (rainfall, lowest first). The mean May high of those 448 cities is 25.3°C; Grajaú is 4.8°C warmer than that mean.
From May to June, average highs rise by 1.4°C to 31.5°C, and monthly rainfall falls from 64 mm to 8.4 mm.
The annual picture
May 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 | 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, selected | 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
May in nearby cities
- Barra do Corda in MayBrazil · 105 kmHigh 30.0°C · Low 22.7°C · 84 mm rain
- Imperatriz in MayBrazil · 153 kmHigh 30.2°C · Low 23.1°C · 74 mm rain
- Açailândia in MayBrazil · 180 kmHigh 29.1°C · Low 21.9°C · 102 mm rain
- Balsas in MayBrazil · 191 kmHigh 30.9°C · Low 22.4°C · 40 mm rain
- Bacabal in MayBrazil · 232 kmHigh 30.0°C · Low 23.5°C · 130 mm rain
- Santa Inês in MayBrazil · 254 kmHigh 29.8°C · Low 23.5°C · 163 mm rain
- Araguaína in MayBrazil · 275 kmHigh 30.3°C · Low 22.2°C · 86 mm rain
- Codó in MayBrazil · 292 kmHigh 30.0°C · Low 23.1°C · 121 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.