Guapiaçu climate — normals and trends
Guapiaçu (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 23.3 °C and it receives 1,398 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 (25.0 °C on average) and the coldest is June (20.0 °C). Rainfall peaks in January.
Guapiaçu averages 0 frost days, 128 hot days (≥ 30 °C) and 150 rainy days per year.
Guapiaçu has warmed by +2.0 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The hottest day of the period reached 41.1 °C (on 3 October 2020) and the coldest 1.4 °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
GuapiaçuSão Paulo
- coords
- -20.80°, -49.22°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
23.3°C
Average daily high
28.7°C
Average daily low
18.9°C
Annual rainfall
1,398mm
Sunshine / day
10.1h
Mean relative humidity
70%
Average peak wind
13.6km/h
Seasonal range
5.0°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
128 d/yr
Rainy days (≥ 1 mm)
150 d/yr
Annual snowfall
0.0 cm
Average feels-like high
31.3 °C
Average feels-like low
19.7 °C
Average peak gust
30.4 km/h
Tropical nights (≥ 20 °C)
168 d/yr
Solar radiation
18.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.64 · 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
41.1 °C
3 October 2020
Coldest day
1.4 °C
18 July 1975
Wettest day
135 mm
26 March 1991
Windiest day
37.4 km/h
7 June 2011
Strongest gust
80.3 km/h
7 June 2011
Hottest feels-like
43.5 °C
10 November 1997
Coldest feels-like
-2.5 °C
18 July 1975
Sunniest day
13.1 h
2 December 2001
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 | 31.5 °C | +2.3 °C | 123 mm | -116 mm |
| Feb | 32.1 °C | +2.7 °C | 81 mm | -121 mm |
| Mar | 32.9 °C | +3.7 °C | 57 mm | -107 mm |
| Apr | 29.8 °C | +1.3 °C | 111 mm | +36 mm |
| May | 28.1 °C | +1.5 °C | 12 mm | -38 mm |
| Jun | 27.1 °C | +1.1 °C | 34 mm | +8 mm |
| Jul | 27.6 °C | +1.0 °C | 6 mm | -16 mm |
| Aug | 30.2 °C | +1.0 °C | 2 mm | -18 mm |
| Sep | 33.5 °C | +2.7 °C | 26 mm | -28 mm |
| Oct | 31.3 °C | +0.7 °C | 76 mm | -56 mm |
| Nov | 31.7 °C | +2.0 °C | 93 mm | -83 mm |
| Dec | 31.2 °C | +2.1 °C | 161 mm | -78 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 Guapiaçu?
Guapiaçu has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 23.3 °C and it receives 1,398 mm of precipitation per year.
What is the hottest day ever recorded in Guapiaçu?
The hottest day measured in Guapiaçu between 1940 and 2025 was 3 October 2020, reaching 41.1 °C.
What is the coldest day in Guapiaçu?
The coldest day measured in Guapiaçu between 1940 and 2025 was 18 July 1975, at 1.4 °C.
Does it snow in Guapiaçu?
Almost never: Guapiaçu sees virtually no snow, with about 0 frost days per year.
Has the climate of Guapiaçu warmed?
Yes: Guapiaçu warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Guapiaçu?
The wettest day measured in Guapiaçu between 1940 and 2025 was 26 March 1991, with 135 mm of rain in 24 hours.
What was the windiest day in Guapiaçu?
The windiest day measured in Guapiaçu between 1940 and 2025 was 7 June 2011, with winds reaching 37.4 km/h.
What is the warmest month in Guapiaçu?
The warmest month in Guapiaçu is October (25.0 °C on average); the coldest is June (20.0 °C).
How much does it rain in Guapiaçu?
Guapiaçu receives on average 1,398 mm of precipitation per year, spread over about 150 rainy days.
Is it sunny in Guapiaçu?
Guapiaçu gets on average 10.1 hours of sunshine per day, roughly 3,687 hours per year over 1940-2025.
Are there tropical nights in Guapiaçu?
Yes: Guapiaçu has on average 168 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Guapiaçu?
In Guapiaçu, between 1940 and 2025, the highest apparent temperature reached 43.5 °C on 10 November 1997, and the lowest was -2.5 °C on 18 July 1975.
Compare Guapiaçu with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Guapiaçu