Jatai climate — normals and trends
Jatai (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 22.6 °C and it receives 1,491 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 (24.3 °C on average) and the coldest is June (20.0 °C). Rainfall peaks in January.
Jatai averages 0 frost days, 94 hot days (≥ 30 °C) and 178 rainy days per year.
Jatai has warmed by +1.4 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.
The hottest day of the period reached 39.8 °C (on 4 October 2020) and the coldest 1.5 °C (on 18 July 1975).
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
JataiGoiás
- coords
- -17.88°, -51.72°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
22.6°C
Average daily high
28.3°C
Average daily low
18.1°C
Annual rainfall
1,491mm
Sunshine / day
10.3h
Mean relative humidity
72%
Average peak wind
12.0km/h
Seasonal range
4.3°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
94 d/yr
Rainy days (≥ 1 mm)
178 d/yr
Annual snowfall
0.0 cm
Average feels-like high
30.9 °C
Average feels-like low
19.1 °C
Average peak gust
28.9 km/h
Tropical nights (≥ 20 °C)
98 d/yr
Solar radiation
18.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.53 · p = < 0.001
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
39.8 °C
4 October 2020
Coldest day
1.5 °C
18 July 1975
Wettest day
112 mm
20 January 1960
Windiest day
34.2 km/h
15 September 1956
Strongest gust
73.8 km/h
8 September 2015
Hottest feels-like
40.7 °C
11 November 1990
Coldest feels-like
-3.2 °C
18 July 1975
Sunniest day
13.0 h
20 December 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 29.3 °C | +1.2 °C | 228 mm | -7 mm |
| Feb | 28.9 °C | +0.6 °C | 130 mm | -87 mm |
| Mar | 29.7 °C | +1.4 °C | 92 mm | -119 mm |
| Apr | 28.3 °C | +0.4 °C | 100 mm | -6 mm |
| May | 27.2 °C | +0.5 °C | 14 mm | -26 mm |
| Jun | 27.1 °C | +0.5 °C | 15 mm | +2 mm |
| Jul | 26.9 °C | -0.2 °C | 0 mm | -11 mm |
| Aug | 29.7 °C | +0.2 °C | 1 mm | -14 mm |
| Sep | 33.1 °C | +2.2 °C | 16 mm | -40 mm |
| Oct | 31.6 °C | +1.6 °C | 59 mm | -98 mm |
| Nov | 31.0 °C | +2.3 °C | 92 mm | -107 mm |
| Dec | 28.6 °C | +0.6 °C | 171 mm | -61 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 Jatai?
Jatai has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 22.6 °C and it receives 1,491 mm of precipitation per year.
What is the hottest day ever recorded in Jatai?
The hottest day measured in Jatai between 1940 and 2025 was 4 October 2020, reaching 39.8 °C.
What is the coldest day in Jatai?
The coldest day measured in Jatai between 1940 and 2025 was 18 July 1975, at 1.5 °C.
Does it snow in Jatai?
Almost never: Jatai sees virtually no snow, with about 0 frost days per year.
Has the climate of Jatai warmed?
Yes: Jatai warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Jatai?
The wettest day measured in Jatai between 1940 and 2025 was 20 January 1960, with 112 mm of rain in 24 hours.
What was the windiest day in Jatai?
The windiest day measured in Jatai between 1940 and 2025 was 15 September 1956, with winds reaching 34.2 km/h.
What is the warmest month in Jatai?
The warmest month in Jatai is September (24.3 °C on average); the coldest is June (20.0 °C).
How much does it rain in Jatai?
Jatai receives on average 1,491 mm of precipitation per year, spread over about 178 rainy days.
Is it sunny in Jatai?
Jatai gets on average 10.3 hours of sunshine per day, roughly 3,760 hours per year over 1940-2025.
Are there tropical nights in Jatai?
Yes: Jatai has on average 98 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Jatai?
In Jatai, between 1940 and 2025, the highest apparent temperature reached 40.7 °C on 11 November 1990, and the lowest was -3.2 °C on 18 July 1975.
Compare Jatai with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Jatai