Major Isidoro climate — normals and trends
Major Isidoro (Brazil) has a hot semi-arid climate (BSh) under the Köppen-Geiger classification. Its mean annual temperature is 25.5 °C and it receives 441 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 January (27.2 °C on average) and the coldest is July (22.6 °C). Rainfall peaks in April.
Major Isidoro averages 0 frost days, 214 hot days (≥ 30 °C) and 121 rainy days per year.
Major Isidoro has warmed by +0.8 °C between 1940 and 2025, or +0.09 °C per decade. This trend is statistically significant.
The hottest day of the period reached 39.9 °C (on 20 March 2019) and the coldest 14.9 °C (on 15 September 1968).
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
Major IsidoroAlagoas
- coords
- -9.53°, -36.98°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.5°C
Average daily high
30.8°C
Average daily low
21.5°C
Annual rainfall
441mm
Sunshine / day
10.6h
Mean relative humidity
71%
Average peak wind
18.2km/h
Seasonal range
4.6°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
214 d/yr
Rainy days (≥ 1 mm)
121 d/yr
Annual snowfall
0.0 cm
Average feels-like high
32.7 °C
Average feels-like low
24.0 °C
Average peak gust
37.4 km/h
Tropical nights (≥ 20 °C)
300 d/yr
Solar radiation
19.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.8 °C
since 1940
+0.1 °C per decade · r² = 0.26 · 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
39.9 °C
20 March 2019
Coldest day
14.9 °C
15 September 1968
Wettest day
129 mm
28 April 1996
Windiest day
29.8 km/h
17 June 1967
Strongest gust
55.1 km/h
13 November 1985
Hottest feels-like
43.0 °C
26 November 2015
Coldest feels-like
15.0 °C
15 September 1968
Sunniest day
12.6 h
18 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 | 33.3 °C | 0.0 °C | 89 mm | +59 mm |
| Feb | 32.0 °C | -0.9 °C | 43 mm | +7 mm |
| Mar | 33.3 °C | +0.7 °C | 12 mm | -45 mm |
| Apr | 34.0 °C | +2.9 °C | 11 mm | -48 mm |
| May | 29.6 °C | +0.5 °C | 106 mm | +50 mm |
| Jun | 27.1 °C | -0.3 °C | 94 mm | +42 mm |
| Jul | 26.4 °C | -0.2 °C | 42 mm | -7 mm |
| Aug | 26.9 °C | -0.5 °C | 48 mm | +15 mm |
| Sep | 27.8 °C | -1.7 °C | 50 mm | +28 mm |
| Oct | 30.7 °C | -1.4 °C | 16 mm | +3 mm |
| Nov | 34.0 °C | +0.5 °C | 7 mm | -11 mm |
| Dec | 34.4 °C | +0.8 °C | 4 mm | -14 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 Major Isidoro?
Major Isidoro has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 25.5 °C and it receives 441 mm of precipitation per year.
What is the hottest day ever recorded in Major Isidoro?
The hottest day measured in Major Isidoro between 1940 and 2025 was 20 March 2019, reaching 39.9 °C.
What is the coldest day in Major Isidoro?
The coldest day measured in Major Isidoro between 1940 and 2025 was 15 September 1968, at 14.9 °C.
Does it snow in Major Isidoro?
Almost never: Major Isidoro sees virtually no snow, with about 0 frost days per year.
Has the climate of Major Isidoro warmed?
Yes: Major Isidoro warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Major Isidoro?
The wettest day measured in Major Isidoro between 1940 and 2025 was 28 April 1996, with 129 mm of rain in 24 hours.
What was the windiest day in Major Isidoro?
The windiest day measured in Major Isidoro between 1940 and 2025 was 17 June 1967, with winds reaching 29.8 km/h.
What is the warmest month in Major Isidoro?
The warmest month in Major Isidoro is January (27.2 °C on average); the coldest is July (22.6 °C).
How much does it rain in Major Isidoro?
Major Isidoro receives on average 441 mm of precipitation per year, spread over about 121 rainy days.
Is it sunny in Major Isidoro?
Major Isidoro gets on average 10.6 hours of sunshine per day, roughly 3,869 hours per year over 1940-2025.
Are there tropical nights in Major Isidoro?
Yes: Major Isidoro has on average 300 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Major Isidoro?
In Major Isidoro, between 1940 and 2025, the highest apparent temperature reached 43.0 °C on 26 November 2015, and the lowest was 15.0 °C on 15 September 1968.
Compare Major Isidoro with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Major Isidoro