Itanhaém climate
Itanhaém (São Paulo, Brazil) has a tropical monsoon climate (Köppen Am). The average temperature over the year is 24 °C75 °F, and about 1,424 mm56 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Itanhaém climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 3086 | 2374 | 2780 | 2228.7 |
| Feb | 3087 | 2374 | 2780 | 1807.1 |
| Mar | 2985 | 2373 | 2679 | 1566.1 |
| Apr | 2882 | 2170 | 2576 | 983.9 |
| May | 2678 | 1865 | 2271 | 753.0 |
| Jun | 2577 | 1763 | 2170 | 662.6 |
| Jul | 2476 | 1661 | 2069 | 742.9 |
| Aug | 2678 | 1662 | 2170 | 441.8 |
| Sep | 2781 | 1864 | 2272 | 813.2 |
| Oct | 2883 | 1967 | 2475 | 1094.3 |
| Nov | 2883 | 2069 | 2476 | 1445.7 |
| Dec | 3086 | 2272 | 2679 | 1756.9 |
| Year | 3087 | 1661 | 2475 | 1,42456 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 84% | 74% | 5.8 | 13:28 |
| Feb | 84% | 65% | 5.8 | 12:56 |
| Mar | 85% | 64% | 5.1 | 12:17 |
| Apr | 85% | 58% | 4.3 | 11:33 |
| May | 84% | 62% | 3.4 | 10:58 |
| Jun | 84% | 61% | 2.9 | 10:39 |
| Jul | 82% | 58% | 3.1 | 10:46 |
| Aug | 80% | 57% | 3.7 | 11:17 |
| Sep | 80% | 69% | 4.0 | 11:59 |
| Oct | 81% | 76% | 4.8 | 12:42 |
| Nov | 82% | 74% | 5.5 | 13:20 |
| Dec | 83% | 72% | 5.9 | 13:37 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Itanhaém is like
The warmest month is February, with an average high of 30 °C87 °F and a low of 23 °C74 °F. The coldest is July, when highs average 24 °C76 °F and lows 16 °C61 °F. Seasonal differences are small — just 6.6 °C11.8 °F between the warmest and the coolest month.
It is wet, with about 1,424 mm56 in of precipitation per year. The wettest three-month stretch is December–February, which brings 40% of the annual total. The wettest month is January (222 mm8.7 in), the driest is August (44 mm1.8 in).
Relative humidity ranges from 80% in August to 85% in March. The clearest skies (lowest average cloud amount, 57%) are typical of August. Average wind speed near the ground ranges from 6 km/h (4 mph) in June to 8 km/h (5 mph) in November. Daylight lasts from about 10.6 hours in June to 13.6 hours in December.
Best time to visit Itanhaém
Based on these averages, the most comfortable months for sightseeing and outdoor activities are June–September: average highs of 24 °C76 °F to 27 °C81 °F with 44 mm1.8 in to 81 mm3.2 in of precipitation per month.
The most challenging month is January, which is hot, with average highs of 30 °C86 °F, very wet (222 mm8.7 in) and humid (84% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Itanhaém
- Summer (December–February) — highs around 30 °C86 °F, lows 2272 to 23 °C74 °F, about 192 mm7.6 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water and an umbrella or light rain jacket.
- Autumn (March–May) — highs 2678 to 29 °C85 °F, lows 1865 to 23 °C73 °F, about 110 mm4.3 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
- Winter (June–August) — highs 2476 to 26 °C78 °F, lows 1661 to 17 °C63 °F, about 61 mm2.4 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses.
- Spring (September–November) — highs 2781 to 28 °C83 °F, lows 1864 to 20 °C69 °F, about 111 mm4.4 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
How Itanhaém compares
Compared with Praia Grande, about 44 km to the northeast, Itanhaém has practically the same average temperature and receives a similar amount of precipitation. The difference is largest in October (0.8 °C1.4 °F warmer).
Of the 223 places in Brazil covered by World Climates, Itanhaém is the 107th warmest by annual mean temperature and the 68th wettest by annual precipitation. See all of them on the Brazil climate page.
Places in other countries with the most similar temperature and rainfall pattern (seasons shifted for the other hemisphere where needed): West Palm Beach (United States, Am), Palm Bay (United States, Cfa) and Port Saint Lucie (United States, Cfa).
Nearby places
- Praia Grande 44 km · 24 °C75 °F · 1,370 mm54 in
- Santos 52 km · 24 °C75 °F · 1,370 mm54 in
- São Paulo 72 km · 20 °C68 °F · 1,352 mm53 in
- Guarulhos 84 km · 20 °C67 °F · 1,380 mm54 in
- Sorocaba 102 km · 21 °C70 °F · 1,294 mm51 in
- Jundiaí 111 km · 21 °C69 °F · 1,312 mm52 in
- Atibaia 121 km · 20 °C68 °F · 1,366 mm54 in
- Jacareí 129 km · 21 °C70 °F · 1,380 mm54 in
Frequently asked questions
What is the warmest month in Itanhaém?
February is the warmest month in Itanhaém, with an average high of 30 °C (87 °F) and an average low of 23 °C (74 °F).
What is the coldest month in Itanhaém?
July is the coldest month, with an average high of 24 °C (76 °F) and an average low of 16 °C (61 °F).
When does it rain the most in Itanhaém?
January is the wettest month with about 222 mm (8.7 in) of precipitation; August is the driest with about 44 mm (1.8 in).
What is the best time to visit Itanhaém?
Judging by long-term averages, the most comfortable months are June–September.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 510 m, while Itanhaém lies at about 12 m. Temperatures on this page were therefore adjusted by +3.2 °C5.8 °F using the standard lapse rate of 6.5 °C per 1,000 m.