Teresina weather in May
In May, Teresina has daytime highs averaging 31 °C, nights around 23 °C, with 13 wet days. Figures are 1991–2020 climate normals.
- 30.9°C Average high
- 23.1°C Average low
- 13days Wet days
- 126mm Rainfall
- 12h Daylight
Daily temperatures through May
How May develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 May | 30.3 °C | 23.0 °C | 58 % |
| 11–20 May | 30.9 °C | 23.2 °C | 39 % |
| 21–31 May | 31.4 °C | 23.1 °C | 28 % |
- Average highs rise from 30.3 °C early in May to 31.4 °C by the end of it.
- Rain is most likely over days 1–10 of May (58 % of days) and least likely over days 21–31 (28 %).
What to expect
| Measure | Typical May | Share of the month |
|---|---|---|
| Days above 25 °C | 31 of 31 | 99 % |
| Days above 30 °C | 22 of 31 | 70 % |
| Days below 0 °C | 0 of 31 | 0 % |
| Days with more than 1 mm rain | 13 of 31 | 41 % |
Conditions in May
| Measure | Average |
|---|---|
| Mean temperature | 27 °C |
| Record high (1991–2020) | 37 °C |
| Record low (1991–2020) | 20 °C |
| Relative humidity | 80 % |
| Wind speed | 11 km/h |
| Cloud cover | 63 % |
Where Teresina ranks in May
| Ranking | Position | Value |
|---|---|---|
| The warmest places in South America in May | 38th of 50 | 31 °C |
May compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| March | 29.9 °C | 346 mm | 82 % |
| April | 29.9 °C | 272 mm | 78 % |
| May | 30.9 °C | 126 mm | 63 % |
| June | 32.6 °C | 17 mm | 47 % |
| July | 33.5 °C | 9 mm | 41 % |
See all twelve months for Teresina
- May is the 9th warmest month here.
- It is the 8th driest month of the year.
- It ranks 7th for least cloud cover.
- Days last about 12 hours from sunrise to sunset.
- It rains on 13 of 31 days — 41 % of the month.
- Nights are about 7.8 °C cooler than the middle of the day.
- The hottest May day on record since 1991 reached 37 °C, 5.6 °C above the usual daytime high.
QuestionsMay in Teresina, answered
How warm is Teresina in May?
Daily highs average 31 °C and nights fall to about 23 °C, a spread of 7.8 °C between afternoon and dawn. That makes May the 8th warmest month of the year here.
Does it rain much in Teresina in May?
May averages 126 mm of rain, spread over about 13 of the 31 days — 41 % of the month. Cloud cover averages 63 % of the sky.
How long are the days in May?
Teresina averages 12 hours between sunrise and sunset in May. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.