Guaíra climate — normals and trends
Guaíra (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 24.0 °C and it receives 1,304 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 October (25.7 °C on average) and the coldest is June (20.9 °C). Rainfall peaks in December.
Guaíra averages 0 frost days, 151 hot days (≥ 30 °C) and 144 rainy days per year.
Guaíra has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The hottest day of the period reached 41.6 °C (on 18 October 1963) and the coldest 3.8 °C (on 21 July 1981).
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
GuaíraSão Paulo
- coords
- -20.32°, -48.31°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
24.0°C
Average daily high
29.3°C
Average daily low
19.7°C
Annual rainfall
1,304mm
Sunshine / day
10.3h
Mean relative humidity
68%
Average peak wind
12.1km/h
Seasonal range
4.8°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
151 d/yr
Rainy days (≥ 1 mm)
144 d/yr
Annual snowfall
0.0 cm
Average feels-like high
31.9 °C
Average feels-like low
21.0 °C
Average peak gust
29.1 km/h
Tropical nights (≥ 20 °C)
202 d/yr
Solar radiation
19.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.61 · 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
41.6 °C
18 October 1963
Coldest day
3.8 °C
21 July 1981
Wettest day
129 mm
15 March 2008
Windiest day
28.4 km/h
11 July 2009
Strongest gust
75.2 km/h
30 July 1989
Hottest feels-like
42.8 °C
17 January 1984
Coldest feels-like
0.8 °C
18 July 1975
Sunniest day
13.2 h
4 December 1970
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 | 31.0 °C | +1.5 °C | 111 mm | -114 mm |
| Feb | 31.8 °C | +2.0 °C | 100 mm | -84 mm |
| Mar | 32.6 °C | +2.8 °C | 63 mm | -92 mm |
| Apr | 29.7 °C | +0.6 °C | 130 mm | +59 mm |
| May | 28.5 °C | +1.2 °C | 7 mm | -32 mm |
| Jun | 27.8 °C | +1.0 °C | 24 mm | +4 mm |
| Jul | 27.8 °C | +0.4 °C | 2 mm | -15 mm |
| Aug | 30.4 °C | +0.5 °C | 9 mm | -6 mm |
| Sep | 33.1 °C | +1.4 °C | 22 mm | -25 mm |
| Oct | 31.6 °C | +0.4 °C | 72 mm | -52 mm |
| Nov | 32.0 °C | +1.9 °C | 92 mm | -82 mm |
| Dec | 31.2 °C | +1.8 °C | 176 mm | -59 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 Guaíra?
Guaíra has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 24.0 °C and it receives 1,304 mm of precipitation per year.
What is the hottest day ever recorded in Guaíra?
The hottest day measured in Guaíra between 1940 and 2025 was 18 October 1963, reaching 41.6 °C.
What is the coldest day in Guaíra?
The coldest day measured in Guaíra between 1940 and 2025 was 21 July 1981, at 3.8 °C.
Does it snow in Guaíra?
Almost never: Guaíra sees virtually no snow, with about 0 frost days per year.
Has the climate of Guaíra warmed?
Yes: Guaíra warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Guaíra?
The wettest day measured in Guaíra between 1940 and 2025 was 15 March 2008, with 129 mm of rain in 24 hours.
What was the windiest day in Guaíra?
The windiest day measured in Guaíra between 1940 and 2025 was 11 July 2009, with winds reaching 28.4 km/h.
What is the warmest month in Guaíra?
The warmest month in Guaíra is October (25.7 °C on average); the coldest is June (20.9 °C).
How much does it rain in Guaíra?
Guaíra receives on average 1,304 mm of precipitation per year, spread over about 144 rainy days.
Is it sunny in Guaíra?
Guaíra gets on average 10.3 hours of sunshine per day, roughly 3,760 hours per year over 1940-2025.
Are there tropical nights in Guaíra?
Yes: Guaíra has on average 202 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Guaíra?
In Guaíra, between 1940 and 2025, the highest apparent temperature reached 42.8 °C on 17 January 1984, and the lowest was 0.8 °C on 18 July 1975.
Compare Guaíra with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Guaíra