Santa Isabel do Rio Negro weather by month & the best time to visit
Brazil · small town · tropical rainforest climate

The best time to visit Santa Isabel do Rio Negro is September — its sunniest month (Sunshine Score 65/100), with January and February close behind. Santa Isabel do Rio Negro averages about 1,951 hours of sunshine a year. Daytime highs around 29°C / 84°F and roughly 137 mm of rain in September.
When is the best time to visit Santa Isabel do Rio Negro?
For sunshine, the best time to visit Santa Isabel do Rio Negro is September, then January and February. The dullest month is January (63/100, 215 mm of rain). The full month-by-month picture is in the table below.
How sunny is Santa Isabel do Rio Negro?
Santa Isabel do Rio Negro gets a moderate 1,951 hours of sunshine a year. Conditions barely change through the year — only 2 Sunshine Score points separate September from January. It ranks #125 of 131 destinations in Brazil for annual sunshine, below the national median of 2,486 hours. The year's 2,484 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV |
|---|---|---|---|---|---|
| January | 63 | 29° / 84°F | 24° / 75°F | 215 mm | 10 |
| February | 63 | 29° / 84°F | 24° / 75°F | 195 mm | 10 |
| March | 63 | 28° / 82°F | 24° / 75°F | 266 mm | 10 |
| April | 63 | 28° / 82°F | 24° / 75°F | 296 mm | 9 |
| May | 63 | 28° / 82°F | 23° / 73°F | 302 mm | 8 |
| June | 63 | 28° / 82°F | 23° / 73°F | 221 mm | 8 |
| July | 63 | 28° / 82°F | 23° / 73°F | 184 mm | 8 |
| August | 63 | 29° / 84°F | 23° / 73°F | 154 mm | 9 |
| September | 65 | 29° / 84°F | 24° / 75°F | 137 mm | 9 |
| October | 63 | 29° / 84°F | 24° / 75°F | 145 mm | 9 |
| November | 63 | 29° / 84°F | 24° / 75°F | 170 mm | 9 |
| December | 63 | 29° / 84°F | 24° / 75°F | 199 mm | 9 |
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Santa Isabel do Rio Negro: questions and answers
What kind of destination is Santa Isabel do Rio Negro?
Santa Isabel do Rio Negro is a small town in Brazil with a tropical rainforest climate.
How many hours of sunshine does Santa Isabel do Rio Negro get a year?
Santa Isabel do Rio Negro gets about 1,951 hours of sunshine a year, at its best around September.
When is the best time to visit Santa Isabel do Rio Negro?
The sunniest time to visit Santa Isabel do Rio Negro is September, when the Sunshine Score peaks at 65/100 (with January and February close behind). Expect daytime highs around 29°C / 84°F.
What is the least sunny month in Santa Isabel do Rio Negro?
January is the least sunny month in Santa Isabel do Rio Negro, scoring 63/100 with about 215 mm of rain.
How strong is the sun in Santa Isabel do Rio Negro?
The typical midday UV index in Santa Isabel do Rio Negro peaks around 10 (very high) in January, easing to about 8 (very high) in May. Month-by-month midday UV values are in the UV column of the table on this page.
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