Guaraí climate — normals and trends
Guaraí (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 26.5 °C and it receives 1,644 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is September (29.0 °C on average) and the coldest is January (25.1 °C). Rainfall peaks in January.
Guaraí averages 0 frost days, 254 hot days (≥ 30 °C) and 176 rainy days per year.
Guaraí has warmed by +0.4 °C between 1940 and 2025, or +0.05 °C per decade. This trend is statistically significant.
The hottest day of the period reached 40.3 °C (on 29 October 1963) and the coldest 16.0 °C (on 14 July 2025).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
GuaraíTocantins
- coords
- -8.83°, -48.51°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.5°C
Average daily high
31.6°C
Average daily low
22.1°C
Annual rainfall
1,644mm
Sunshine / day
10.2h
Mean relative humidity
69%
Average peak wind
10.9km/h
Seasonal range
3.9°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
254 d/yr
Rainy days (≥ 1 mm)
176 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.5 °C
Average feels-like low
24.6 °C
Average peak gust
29.7 km/h
Tropical nights (≥ 20 °C)
353 d/yr
Solar radiation
19.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.4 °C
since 1940
+0.1 °C per decade · r² = 0.05 · p = 0.049
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
40.3 °C
29 October 1963
Coldest day
16.0 °C
14 July 2025
Wettest day
238 mm
9 February 2018
Windiest day
25.6 km/h
25 May 1968
Strongest gust
53.6 km/h
29 August 2024
Hottest feels-like
43.8 °C
26 April 1998
Coldest feels-like
14.8 °C
21 July 2023
Sunniest day
12.5 h
3 January 2015
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 29.6 °C | +0.2 °C | 367 mm | +87 mm |
| Feb | 29.7 °C | +0.4 °C | 214 mm | -51 mm |
| Mar | 30.4 °C | +1.0 °C | 164 mm | -108 mm |
| Apr | 31.3 °C | +1.4 °C | 96 mm | -79 mm |
| May | 33.0 °C | +1.7 °C | 10 mm | -42 mm |
| Jun | 33.8 °C | +1.2 °C | 2 mm | -4 mm |
| Jul | 34.5 °C | +1.0 °C | 0 mm | -2 mm |
| Aug | 36.3 °C | +1.3 °C | 0 mm | -4 mm |
| Sep | 36.6 °C | +1.4 °C | 19 mm | -9 mm |
| Oct | 34.6 °C | +1.6 °C | 57 mm | -55 mm |
| Nov | 31.5 °C | +0.6 °C | 208 mm | +6 mm |
| Dec | 30.2 °C | +0.2 °C | 226 mm | -21 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Guaraí?
Guaraí has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 26.5 °C and it receives 1,644 mm of precipitation per year.
What is the hottest day ever recorded in Guaraí?
The hottest day measured in Guaraí between 1940 and 2025 was 29 October 1963, reaching 40.3 °C.
What is the coldest day in Guaraí?
The coldest day measured in Guaraí between 1940 and 2025 was 14 July 2025, at 16.0 °C.
Does it snow in Guaraí?
Almost never: Guaraí sees virtually no snow, with about 0 frost days per year.
Has the climate of Guaraí warmed?
Yes: Guaraí warmed by +0.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Guaraí?
The wettest day measured in Guaraí between 1940 and 2025 was 9 February 2018, with 238 mm of rain in 24 hours.
What was the windiest day in Guaraí?
The windiest day measured in Guaraí between 1940 and 2025 was 25 May 1968, with winds reaching 25.6 km/h.
What is the warmest month in Guaraí?
The warmest month in Guaraí is September (29.0 °C on average); the coldest is January (25.1 °C).
How much does it rain in Guaraí?
Guaraí receives on average 1,644 mm of precipitation per year, spread over about 176 rainy days.
Is it sunny in Guaraí?
Guaraí gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.
Are there tropical nights in Guaraí?
Yes: Guaraí has on average 353 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Guaraí?
In Guaraí, between 1940 and 2025, the highest apparent temperature reached 43.8 °C on 26 April 1998, and the lowest was 14.8 °C on 21 July 2023.
Compare Guaraí with another city
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Nearby cities
The climate around Guaraí