Month by month
| Month | Afternoon | Sea | Rain | Verdict |
|---|---|---|---|---|
| January | 29.2 °C | 27 °C | 24 days | Unfavourable season |
| February | 28.9 °C | 27.3 °C | 22 days | Unfavourable season |
| March | 27.9 °C | 26.4 °C | 23 days | Unfavourable season |
| April | 26.1 °C | 25.1 °C | 15 days | Possible, with trade-offs |
| May | 23.2 °C | 22.8 °C | 12 days | Pleasant — a good time to go |
| June | 21.7 °C | 20.5 °C | 9 days | Pleasant — a good time to go |
| July | 21.2 °C | 18.8 °C | 10 days | Pleasant — a good time to go |
| August | 21.9 °C | 19 °C | 10 days | Pleasant — a good time to go |
| September | 23.6 °C | 20.2 °C | 15 days | Possible, with trade-offs |
| October | 24.4 °C | 21.4 °C | 20 days | Unfavourable season |
| November | 25.9 °C | 23.3 °C | 20 days | Unfavourable season |
| December | 28 °C | 25.2 °C | 22 days | Unfavourable season |
Nearby in September
Before you go
Three things to check once you have picked your dates.
Entry
No visa needed for stays of up to 90 days. Passport valid for at least 6 months. Make sure border control stamps your passport; an unstamped passport may mean a fine when you leave.
For a British passport, per the UK Foreign Office on 9 September 2026. Rules change: check before booking.
Safety
Outside the areas advised against
Parts of the country are advised against (river areas of western Amazonas State (the Amazon west of Codajás, the Itaquaí, the Japurá, the upper Rio Negro)); Joinville is not one of them.
Official advice updated 9 September 2026
Health
Vaccines · hepatitis A and hepatitis B if you are not already vaccinated; chikungunya depending on activities and areas visited. Routine vaccines up to date (measles in particular).
Yellow fever · Vaccine recommended for parts of the country. No entry requirement.
Malaria · Present. Areas: All areas in the states of Acre, Amapá, Amazonas, Rondônia, and Roraima Present in the states of Maranhão, Mato Grosso, and Pará, but rare cases in their capital cities (São Luis [capital of Maranhão], Cuiabá [capital of Mato Grosso], Belém [capital of Pará]) Rare cases and sporadic foci of transmission in rural and forested areas in the states of Espírito Santo, Goiás, Minas Gerais, Mato Grosso do Sul, Piauí, Rio de Janeiro, São Paolo, and Tocantins No malaria transmission in the cities of Brasília (the capital), Rio de Janeiro, or São Paolo No malaria transmission at Iguaçu Falls. Preventive medication recommended: Atovaquone-proguanil, doxycycline, mefloquine, tafenoquine Areas with rare cases: No chemoprophylaxis recommended (insect bite precautions and mosquito avoidance only) — prescribed before departure.
Mosquitoes · dengue and Zika reported: protect yourself from bites.
Per the CDC (page reviewed 3 September 2026); see a travel clinic a few weeks before departure.
Beau Fixe is not a safety or health authority. These notes summarise dated public texts and link to their source: France Diplomatie (Licence Ouverte 2.0), Foreign, Commonwealth & Development Office (gov.uk, Open Government Licence v3.0), Centers for Disease Control and Prevention (Source: CDC). Only the competent authorities are authoritative.
FAQ
Can you swim in Joinville in September?
The sea averages 20.2°C in September — swimming is possible but brisk.
How hot is Joinville in September?
Expect 23.6°C in the afternoon and 16.6°C at night, averaged over the last 10 years.
Does it rain a lot in Joinville in September?
Around 15 days with rain (≥ 1 mm) in the month — 49% of days.