Rio de Janeiro · Brazil

Rio de Janeiro in September: every year compared

In September, Rio de Janeiro averages highs of 27.8 °C and lows of 19.0 °C, with 86 mm of precipitation. The warmest September was 1961 (25.4 °C), the coldest 1941 (20.5 °C).

Avg. highAvg. high 27.8 °C

Avg. lowAvg. low 19.0 °C

PrecipitationPrecipitation 86 mm

Rainy daysRainy days 11

Day by day through September

Normal high and low for each day of September in Rio de Janeiro.

Normal high and low, day by dayNormal 1991–2020

Every September in Rio de Janeiro, ranked

86 months of September since 1940. The last one, 2025, ranks 34 of 86 (−0.2 °C vs normal).

194019832025

2025 · 22.7 °C · −0.2 °C vs normal · rank 34 of 86

Warmest years

1196125.4 °C
2202325.0 °C
3202425.0 °C
4202024.8 °C
5194424.4 °C

Coldest years

1194320.5 °C
2194120.5 °C
3194920.8 °C
4198320.9 °C
5194220.9 °C

All 86 years in a table

Year	Mean temperature	Daytime highs	Night lows	Precipitation	Hot days (30 °C+)	Rainy days
2025	22.7 °C	27.8 °C	18.6 °C	43 mm	9 days	11 days
2024	25.0 °C	31.3 °C	20.3 °C	17 mm	21 days	7 days
2023	25.0 °C	31.0 °C	20.4 °C	45 mm	20 days	6 days
2022	21.2 °C	25.9 °C	17.5 °C	130 mm	4 days	14 days
2021	23.8 °C	28.8 °C	19.9 °C	34 mm	12 days	5 days
2020	24.8 °C	30.4 °C	20.6 °C	102 mm	17 days	6 days
2019	23.4 °C	28.0 °C	20.0 °C	108 mm	11 days	17 days
2018	23.7 °C	28.4 °C	20.1 °C	64 mm	10 days	10 days
2017	23.7 °C	30.0 °C	18.3 °C	9 mm	16 days	2 days
2016	23.3 °C	27.6 °C	19.8 °C	48 mm	8 days	7 days
2015	24.3 °C	29.0 °C	20.5 °C	151 mm	14 days	14 days
2014	23.7 °C	29.3 °C	19.2 °C	38 mm	13 days	9 days
2013	23.1 °C	28.3 °C	18.7 °C	83 mm	13 days	10 days
2012	23.0 °C	28.5 °C	18.4 °C	55 mm	11 days	5 days
2011	21.5 °C	26.7 °C	17.2 °C	32 mm	7 days	5 days
2010	23.0 °C	28.0 °C	19.1 °C	82 mm	13 days	12 days
2009	24.2 °C	28.8 °C	20.5 °C	86 mm	11 days	11 days
2008	21.7 °C	26.3 °C	18.1 °C	110 mm	6 days	14 days
2007	23.3 °C	29.3 °C	18.6 °C	33 mm	14 days	6 days
2006	22.4 °C	27.1 °C	18.7 °C	76 mm	7 days	11 days
2005	22.5 °C	26.2 °C	19.7 °C	130 mm	6 days	18 days
2004	24.0 °C	29.8 °C	20.1 °C	36 mm	15 days	6 days
2003	22.1 °C	27.0 °C	18.7 °C	67 mm	6 days	11 days
2002	22.0 °C	26.7 °C	18.0 °C	121 mm	9 days	11 days
2001	22.2 °C	26.8 °C	18.4 °C	76 mm	7 days	11 days
2000	22.2 °C	26.4 °C	18.3 °C	125 mm	8 days	11 days
1999	22.6 °C	28.2 °C	18.0 °C	76 mm	11 days	11 days
1998	23.0 °C	27.4 °C	19.4 °C	126 mm	8 days	15 days
1997	23.6 °C	29.3 °C	19.4 °C	60 mm	14 days	14 days
1996	21.5 °C	25.8 °C	17.9 °C	137 mm	4 days	17 days
1995	22.9 °C	28.6 °C	18.4 °C	98 mm	13 days	14 days
1994	22.7 °C	27.9 °C	18.3 °C	59 mm	11 days	9 days
1993	22.5 °C	26.3 °C	19.5 °C	128 mm	6 days	16 days
1992	22.1 °C	25.7 °C	19.2 °C	193 mm	6 days	18 days
1991	21.5 °C	25.5 °C	17.7 °C	85 mm	4 days	10 days
1990	21.3 °C	25.4 °C	17.6 °C	128 mm	5 days	10 days
1989	22.3 °C	25.9 °C	19.1 °C	134 mm	6 days	15 days
1988	22.9 °C	27.5 °C	19.1 °C	59 mm	11 days	11 days
1987	21.6 °C	24.7 °C	18.9 °C	130 mm	5 days	17 days
1986	21.9 °C	25.9 °C	18.3 °C	62 mm	5 days	13 days
1985	21.7 °C	25.7 °C	18.5 °C	101 mm	3 days	12 days
1984	21.7 °C	25.7 °C	18.3 °C	113 mm	2 days	11 days
1983	20.9 °C	23.7 °C	18.9 °C	261 mm	0 days	25 days
1982	22.2 °C	26.4 °C	18.6 °C	56 mm	6 days	10 days
1981	23.3 °C	29.0 °C	18.9 °C	37 mm	13 days	7 days
1980	21.4 °C	25.3 °C	18.0 °C	121 mm	6 days	17 days
1979	21.8 °C	25.5 °C	18.2 °C	166 mm	7 days	16 days
1978	22.4 °C	26.7 °C	18.6 °C	60 mm	3 days	13 days
1977	22.9 °C	27.4 °C	19.3 °C	134 mm	11 days	14 days
1976	21.4 °C	24.9 °C	18.6 °C	221 mm	3 days	18 days
1975	22.5 °C	27.2 °C	18.7 °C	64 mm	8 days	11 days
1974	22.8 °C	27.5 °C	19.0 °C	86 mm	9 days	11 days
1973	21.9 °C	26.1 °C	18.6 °C	128 mm	8 days	14 days
1972	22.6 °C	26.9 °C	19.2 °C	70 mm	6 days	12 days
1971	21.5 °C	26.0 °C	17.7 °C	93 mm	6 days	14 days
1970	21.5 °C	25.1 °C	18.5 °C	158 mm	0 days	19 days
1969	23.2 °C	28.3 °C	19.2 °C	38 mm	12 days	10 days
1968	21.1 °C	26.0 °C	17.3 °C	114 mm	6 days	10 days
1967	22.9 °C	27.4 °C	19.2 °C	61 mm	10 days	12 days
1966	21.5 °C	26.2 °C	17.7 °C	109 mm	10 days	10 days
1965	23.4 °C	28.7 °C	19.6 °C	44 mm	13 days	9 days
1964	22.4 °C	28.0 °C	18.1 °C	47 mm	13 days	10 days
1963	24.4 °C	31.4 °C	19.6 °C	31 mm	21 days	5 days
1962	22.0 °C	26.8 °C	18.4 °C	87 mm	11 days	13 days
1961	25.4 °C	32.0 °C	20.9 °C	19 mm	18 days	6 days
1960	22.3 °C	27.8 °C	18.3 °C	82 mm	11 days	11 days
1959	23.3 °C	29.1 °C	19.4 °C	58 mm	13 days	11 days
1958	21.1 °C	26.4 °C	17.1 °C	100 mm	5 days	11 days
1957	22.1 °C	26.2 °C	19.3 °C	133 mm	5 days	20 days
1956	21.9 °C	27.0 °C	18.2 °C	85 mm	5 days	11 days
1955	22.8 °C	28.8 °C	18.4 °C	18 mm	13 days	5 days
1954	23.9 °C	29.8 °C	20.0 °C	39 mm	14 days	13 days
1953	22.7 °C	27.3 °C	19.5 °C	70 mm	9 days	11 days
1952	22.3 °C	26.6 °C	19.2 °C	96 mm	9 days	13 days
1951	21.7 °C	27.5 °C	17.6 °C	49 mm	10 days	10 days
1950	22.4 °C	27.2 °C	18.8 °C	119 mm	12 days	14 days
1949	20.8 °C	25.5 °C	17.3 °C	120 mm	5 days	16 days
1948	22.6 °C	29.1 °C	17.9 °C	29 mm	15 days	3 days
1947	21.2 °C	25.7 °C	18.0 °C	147 mm	4 days	16 days
1946	22.8 °C	27.7 °C	19.2 °C	150 mm	10 days	13 days
1945	22.5 °C	27.3 °C	18.9 °C	106 mm	7 days	14 days
1944	24.4 °C	31.5 °C	19.2 °C	9 mm	21 days	3 days
1943	20.5 °C	24.9 °C	16.7 °C	94 mm	3 days	13 days
1942	20.9 °C	26.9 °C	16.4 °C	24 mm	5 days	6 days
1941	20.5 °C	24.8 °C	17.6 °C	150 mm	3 days	18 days
1940	22.3 °C	29.1 °C	18.0 °C	40 mm	16 days	7 days

September records

Hottest day

41.3 °C

September 28, 1961 estimate

Coldest night

11.0 °C

September 4, 2011 estimate

Wettest day

63 mm

September 16, 1946 estimate

The weather on your birthday in Rio de Janeiro

Any day since 1940: high, low, rain, snow, and how warm it was compared with the same date in every other year.

Questions & answers

How warm is Rio de Janeiro in September?

Highs average 27.8 °C and lows 19.0 °C. A typical September brings 10 hot days (30 °C or more) and 0 frost days.

Does it rain a lot in Rio de Janeiro in September?

About 86 mm falls in September, over some 11 days with at least 1 mm. The wettest September was 1983 (261 mm), the driest 1944 (9 mm).

What was the warmest September in Rio de Janeiro?

1961, with a mean temperature of 25.4 °C. The coldest was 1941 (20.5 °C). The last one, 2025, ranks 34 of 86.