Annual mean 18°C · wettest around October · prevailing wind N
Warmest
25.8 °C
Coldest
16.2 °C
Wettest
49%
Windiest
2.6 m/s
Prevailing
N
2.2 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Rio Negro over the whole year is 18°C. January is the hottest month, with highs of about 25°C; July is the coldest, with lows of about 10°C. The rainy (wet) season in Rio Negro runs from October to March, peaking in October with a 47% chance of rain on a given day. The dry season is July to September; July is the driest month, at 22%. Winds in Rio Negro are highest in November, averaging 1.9 m/s (7 km/h), and lightest in July, at 1.3 m/s (5 km/h). The prevailing wind is from the N. The clearest skies in Rio Negro come in July, when the sky is typically 62% covered; October is the cloudiest month, at 82%.
Month by month Rio Negro climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
25°C
19°C
27°C
45%
74%
1.8 m/s
52
57
20
February
25°C
19°C
27°C
41%
68%
1.6 m/s
53
59
19
March
25°C
18°C
26°C
38%
72%
1.5 m/s
59
56
23
April
22°C
16°C
23°C
30%
69%
1.5 m/s
78
30
51
May
20°C
14°C
20°C
36%
67%
1.4 m/s
75
15
68
June
18°C
12°C
17°C
37%
62%
1.4 m/s
65
7
75
July
17°C
10°C
16°C
22%
62%
1.3 m/s
60
5
77
August
18°C
11°C
17°C
28%
68%
1.6 m/s
62
10
72
September
21°C
14°C
21°C
30%
71%
1.7 m/s
69
26
57
October
21°C
15°C
22°C
47%
82%
1.8 m/s
73
24
57
November
23°C
16°C
23°C
35%
74%
1.9 m/s
75
34
47
December
25°C
18°C
26°C
42%
76%
1.8 m/s
62
49
29
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Rio Negro weather by season
Year round, Rio Negro has days of about 17°C at their warmest in July, its coolest month, and 25°C in January, its warmest; the coolest hours of the day run from 10°C to 19°C through the year, and the average temperature over the year is 18°C around the clock. Rain is most likely around October and least likely around July. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Rio Negro weather in winterJune to August
High 18°CLow 11°CRain 29%
Winter in Rio Negro has typical daily highs of about 18°C and lows of about 11°C, with a 29% chance of rain on a given day.
Rio Negro weather in springSeptember to November
High 22°CLow 15°CRain 37%
Spring in Rio Negro has typical daily highs of about 22°C and lows of about 15°C, with a 37% chance of rain on a given day.
Rio Negro weather in summerDecember to February
High 25°CLow 19°CRain 42%
Summer in Rio Negro has typical daily highs of about 25°C and lows of about 19°C, with a 42% chance of rain on a given day.
Rio Negro weather in autumnMarch to May
High 22°CLow 16°CRain 35%
Autumn in Rio Negro has typical daily highs of about 22°C and lows of about 16°C, with a 35% chance of rain on a given day.
When is the rainy season in Rio Negro?
The rainy (wet) season in Rio Negro runs from October to March, peaking in October with a 47% chance of rain on a given day. The dry season is July to September; July is the driest month, at 22%.
What time of year is Rio Negro windiest?
Winds in Rio Negro are highest in November, averaging 1.9 m/s (7 km/h), and lightest in July, at 1.3 m/s (5 km/h). The prevailing wind is from the N.
What is the average temperature in Rio Negro year round?
The average temperature in Rio Negro over the whole year is 18°C. January is the hottest month, with highs of about 25°C; July is the coldest, with lows of about 10°C.