Weather in Fortaleza 🇧🇷
Monthly weather averages & travel planning
December
Avg Temp
30°C
Rain Days
10 days
Sun Hours
12 hrs
Humidity
82%
South America › 🇧🇷 Brazil › Fortaleza
Updated: March 2026
Is December a Good Time to Visit Fortaleza?
5/10
Fair
December is a fair time to visit Fortaleza (5/10). With 12 daily sunshine hours and only 10 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 3rd sunniest of the year in Fortaleza. Culture-focused travellers and those who prefer lighter crowds will find December a practical choice, with prices running lower than peak October without sacrificing all the good weather. January offers a similar profile at lower hotel rates if dates are flexible. The main practical note: Fortaleza's popular sites are busiest between 10am and 3pm regardless of season. Arriving at opening time or after 4pm makes a significant difference to the experience. Planning tips: accommodation is generally available without long lead times, and flight prices are typically lower than peak season. Flexible travellers will find the best deals by booking 2-4 weeks ahead. Mid-week arrivals consistently unlock lower hotel rates than weekend check-ins.
vs November:30°C avg high
December sits at a particular moment in Fortaleza's seasonal arc. Temperatures average 30°C during the day, placing this month in the warmer half of the year, when the city operates at full summer intensity. Against the seasonal backdrop, 10 rainy days and 12 sunshine hours per day help calibrate expectations for what actually awaits on the ground.
30°C
86°F
Avg High
25°C
77°F
Avg Low
10 days
30 mm total
Rain Days
12h
per day avg
Sunshine
82%
Humid
Humidity
Temperature in Fortaleza in December
The narrow 5°C gap between daytime and overnight temperatures, characteristic of coastal cities with maritime moderation, means a single mid-layer works across the whole day. At 82% humidity, the 30°C daytime high feels 2-4°C warmer in practice: quick-dry fabrics and shade-seeking between noon and 3pm are the sensible response. UV index averages 8 this month, classed as high to very high. SPF 30+ sunscreen, a brim hat, and sunglasses are not optional between 10am and 4pm. Wind averages 24 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 86°F average high, 77°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).
Temperature Trends
High
Low
Rainfall (mm)
0-20 mm21-50 mm51-100 mm100+ mm
What to Wear in Fortaleza in December
Morning25°CBefore the day warms up
Afternoon30°CPeak daytime temperature
Evening28°CAfter sunset cools down
Packing for Fortaleza in December means dressing for 30°C days and 25°C evenings. A lightweight linen or cotton shirt with loose-fit trousers or a sundress handles the 30°C daytime heat. Evening temperatures settle at 25°C, a modest 5°C drop that a light cardigan or denim jacket covers. For footwear, breathable walking sandals work for casual exploration, but closed-toe trainers are better for uneven surfaces in the historic centre. A compact foldable umbrella weighs almost nothing and earns its keep across 10 potential rainy days. At 82% average humidity, quick-dry synthetic or bamboo fabrics dry overnight and stay comfortable longer than cotton.
Local tip: Layers are more practical than a single heavy garment in Fortaleza. The day-to-evening temperature shift rewards packing a versatile mid-layer you can add or remove as conditions change.
Events in Fortaleza in December
December has no major festivals or public holidays in Fortaleza, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.
What to Pack for Fortaleza in December
Based on 30°C average highs and 10 rainy days
- Light layers for morning and evening
- Breathable T-shirts and comfortable trousers
- UV-protective sunglasses
- Quick-dry travel towel
- Anti-chafe balm for long walking days
- Moisture-wicking synthetic fabrics for active days
- Compact folding umbrella
- Waterproof outer layer or packable rain jacket
- Quick-dry clothing that recovers fast after a shower
- SPF 30+ sunscreen
- Comfortable walking shoes (a second pair lets the first air out overnight)
- Universal travel adapter
- Small day pack for city exploration
- Reusable water bottle
Best Activities in Fortaleza in December
- Early morning walk through Fortaleza's historic market districtBest before 9amTemperatures are still manageable at 26°C before the midday heat builds
- Open-air rooftop dining at sunsetFrom 6pm onwardsThe 30°C daytime heat drops noticeably after sunset, making al fresco dining comfortable
- Waterfront promenade or harbour walkEarly morning or after 5pmSea breezes cut through the humidity, making coastal routes the most pleasant in heat
- Guided cycling tour of the old quarterFirst tour of the day (7-9am)The low-traffic window before tourist crowds and the cooler morning air make this the prime riding slot
- Afternoon in a world-class museum or galleryAfternoon (2-5pm)Pairs well with outdoor morning activities and provides a mid-day rest from sightseeing
- Coffee-house or traditional cafe culture experienceMid-morning or post-lunchA cultural ritual in this region that rewards slow appreciation regardless of weather
- Evening live music, theatre, or opera performanceEvening shows typically at 7-9pmConsistent evening temperatures make getting to and from evening venues comfortable
- Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningDecember brings distinct seasonal changes to public green spaces worth exploring
- Seek out chilled local specialities: cold-brew tea, ice desserts, or chilled seafood at street-level stallsAny time; most atmospheric in evening marketsHot-weather street food culture peaks in December, with vendors setting up specifically for warm evenings
Why is Fortaleza warm in December?
Fortaleza's December climate is governed by the Inter-Tropical Convergence Zone (ITCZ), which draws moisture-laden trade winds across the region, producing the characteristic wet season rainfall of steamy tropical cities. Daytime heat peaks around 30°C, moderated slightly by afternoon convective showers. Overnight temperatures remain warm at 25°C because the humid air retains heat effectively. Climate data: Open-Meteo ERA5 (1991–2020).
Sunshine Hours
The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.
UV Index
A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate, wear sunscreen. UV 6-7: High, hat and SPF 30+ essential. UV 8-10: Very High, limit midday exposure. UV 11+: Extreme, seek shade between 10am-4pm.
Rain Days
A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.
Humidity
Relative humidity as a percentage. Below 40%: Dry, skin and throat may feel parched. 40-60%: Comfortable, ideal for most people. 60-80%: Sticky, light breathable fabrics recommended. Above 80%: Muggy, heat feels more intense; quick-dry clothing is essential.
Frequently Asked Questions
Fortaleza in December
In December, Fortaleza experiences average highs of 30°C (86°F) and lows of 25°C (77°F). Expect around 10 rainy days and 12 hours of sunshine per day, with humidity averaging 82%. The 5°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an overshirt or cardigan handles the cooler evenings. UV index averages 8, so sun protection is advisable on clear days.
Fortaleza typically sees 10 rainy days in December, with total precipitation of around 30mm. Rain is moderate and manageable. Showers tend to pass quickly, and a light rain layer or foldable umbrella is sufficient protection for most days. For context, the driest month in Fortaleza typically sees 4-6 fewer rain days than December.
Pack lightweight, breathable clothing (linen or cotton), a wide-brim sun hat, SPF 50+ sunscreen, and a refillable water bottle for Fortaleza in December. The 30°C daytime heat demands sun protection during midday hours, typically 11am to 4pm. A compact travel umbrella is also worth packing, as 10 rainy days means afternoon showers are a real possibility. Quick-dry synthetic fabrics are preferable to cotton in 82% humidity.
Yes, December is an excellent time to visit Fortaleza. With 12 daily sunshine hours and only 10 rainy days, conditions are ideal for sightseeing and outdoor activities. Temperatures averaging 30°C during the day are comfortable for long walks and outdoor dining. This is peak travel season, so booking accommodation in advance and arriving at popular attractions early in the morning helps avoid the busiest periods.
The average high temperature in Fortaleza in December is 30°C (86°F), and the average low is 25°C (77°F). The mean daily temperature is approximately 28°C (82°F). The day-to-night range of 5°C is narrow, typical of coastal or maritime cities. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.
The best month to visit Fortaleza is generally October. October offers the most sunshine at 12 hours per day and only 2 rainy days. Average temperatures reach 30°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around October gives you the best chance of dry, bright weather.
December is shoulder or low season in Fortaleza, meaning fewer tourists and generally lower prices than peak months. With 12 sunshine hours and 10 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.
In December, Fortaleza suits a range of activities thanks to warm temperatures of 30°C. Mix of indoor and outdoor activities works well given the moderate chance of rain. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. With 12 hours of sunshine, parks and waterfront walks are particularly enjoyable.
December ranks 3rd sunniest of the year in Fortaleza, with an average 12 daily sunshine hours. The driest months are September, October, and August. August is the hottest month (30°C avg high); January is the coolest (29°C). From here, temperatures fall 1°C into January. Compared to last month (November: 30°C high, 3 rain days), December is similarly warm and wetter. December is among the top three sunniest months to visit Fortaleza.
Year-Round Climate
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 29°C | 25°C | 18 | 11h | View |
| February | 29°C | 25°C | 20 | 11h | View |
| March | 29°C | 25°C | 25 | 10h | View |
| April | 29°C | 24°C | 26 | 9h | View |
| May | 29°C | 25°C | 20 | 10h | View |
| June | 29°C | 24°C | 14 | 11h | View |
| July | 29°C | 24°C | 8 | 11h | View |
| August | 30°C | 24°C | 3 | 11h | View |
| September | 30°C | 24°C | 2 | 11h | View |
| October | 30°C | 25°C | 2 | 12h | View |
| November | 30°C | 25°C | 3 | 12h | View |
| December | 30°C | 25°C | 10 | 12h | View |
January
18 rain days, 11h sun
29°25°
February
20 rain days, 11h sun
29°25°
March
25 rain days, 10h sun
29°25°
April
26 rain days, 9h sun
29°24°
May
20 rain days, 10h sun
29°25°
June
14 rain days, 11h sun
29°24°
July
8 rain days, 11h sun
29°24°
August
3 rain days, 11h sun
30°24°
September
2 rain days, 11h sun
30°24°
October
2 rain days, 12h sun
30°25°
November
3 rain days, 12h sun
30°25°
December
10 rain days, 12h sun
30°25°
Other Months in Fortaleza
Plan Your Trip to Fortaleza
Data Sources for Fortaleza
Climate normals represent 30-year averages (1991-2020). Individual years may vary.