Mossoró climate — normals and trends
Mossoró (Brazil) has a hot semi-arid climate (BSh) under the Köppen-Geiger classification. Its mean annual temperature is 27.6 °C and it receives 569 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 (28.3 °C on average) and the coldest is March (26.9 °C). Rainfall peaks in March.
Mossoró averages 0 frost days, 335 hot days (≥ 30 °C) and 92 rainy days per year.
Mossoró has warmed by +1.1 °C between 1940 and 2025, or +0.13 °C per decade. This trend is statistically significant.
The hottest day of the period reached 38.5 °C (on 12 February 1958) and the coldest 18.2 °C (on 5 August 1974).
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
MossoróRio Grande do Norte
- coords
- -5.19°, -37.34°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
27.6°C
Average daily high
33.2°C
Average daily low
23.3°C
Annual rainfall
569mm
Sunshine / day
10.9h
Mean relative humidity
66%
Average peak wind
20.9km/h
Seasonal range
1.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
335 d/yr
Rainy days (≥ 1 mm)
92 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.5 °C
Average feels-like low
25.6 °C
Average peak gust
39.9 km/h
Tropical nights (≥ 20 °C)
364 d/yr
Solar radiation
21.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.33 · 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
38.5 °C
12 February 1958
Coldest day
18.2 °C
5 August 1974
Wettest day
89 mm
7 May 1967
Windiest day
32.5 km/h
5 October 1943
Strongest gust
63.4 km/h
2 July 1962
Hottest feels-like
42.2 °C
20 March 2016
Coldest feels-like
17.9 °C
5 August 1974
Sunniest day
12.3 h
28 December 2025
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 | 33.2 °C | -0.2 °C | 95 mm | +33 mm |
| Feb | 33.0 °C | +0.5 °C | 96 mm | -1 mm |
| Mar | 32.2 °C | +0.6 °C | 145 mm | -8 mm |
| Apr | 33.4 °C | +1.9 °C | 60 mm | -70 mm |
| May | 33.9 °C | +1.8 °C | 21 mm | -44 mm |
| Jun | 33.1 °C | +0.8 °C | 26 mm | +4 mm |
| Jul | 33.1 °C | +0.4 °C | 9 mm | -3 mm |
| Aug | 34.0 °C | +0.1 °C | 6 mm | +4 mm |
| Sep | 34.9 °C | +0.2 °C | 1 mm | -1 mm |
| Oct | 35.4 °C | +0.4 °C | 1 mm | -2 mm |
| Nov | 34.9 °C | +0.3 °C | 1 mm | -4 mm |
| Dec | 34.6 °C | +0.4 °C | 3 mm | -17 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 Mossoró?
Mossoró has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 27.6 °C and it receives 569 mm of precipitation per year.
What is the hottest day ever recorded in Mossoró?
The hottest day measured in Mossoró between 1940 and 2025 was 12 February 1958, reaching 38.5 °C.
What is the coldest day in Mossoró?
The coldest day measured in Mossoró between 1940 and 2025 was 5 August 1974, at 18.2 °C.
Does it snow in Mossoró?
Almost never: Mossoró sees virtually no snow, with about 0 frost days per year.
Has the climate of Mossoró warmed?
Yes: Mossoró warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Mossoró?
The wettest day measured in Mossoró between 1940 and 2025 was 7 May 1967, with 89 mm of rain in 24 hours.
What was the windiest day in Mossoró?
The windiest day measured in Mossoró between 1940 and 2025 was 5 October 1943, with winds reaching 32.5 km/h.
What is the warmest month in Mossoró?
The warmest month in Mossoró is October (28.3 °C on average); the coldest is March (26.9 °C).
How much does it rain in Mossoró?
Mossoró receives on average 569 mm of precipitation per year, spread over about 92 rainy days.
Is it sunny in Mossoró?
Mossoró gets on average 10.9 hours of sunshine per day, roughly 3,979 hours per year over 1940-2025.
Are there tropical nights in Mossoró?
Yes: Mossoró has on average 364 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Mossoró?
In Mossoró, between 1940 and 2025, the highest apparent temperature reached 42.2 °C on 20 March 2016, and the lowest was 17.9 °C on 5 August 1974.
Compare Mossoró with another city
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Nearby cities
The climate around Mossoró