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São Mateus Weather in September
During September, São Mateus experiences high daytime temperatures of 23°C (73°F) and cooler nights around 21°C (70°F). Expect quite a bit of rainfall. Around 66 mm (2.6 in) is typical.
Rainfall in São Mateus in September
Analyzing past climate data, one can expect approximately 15 days of rain, averaging 66 mm (2.6 in). With rain spread across many days but low totals, showers are typically short and light rather than heavy.
Temperature in São Mateus in September
São Mateus in September has excellent weather. Days reach 23°C (73°F) and nights cool to 21°C (70°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights are mild at around 21°C (70°F), which is comfortable for most people.If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit São Mateus.
São Mateus Temperature in September
Min Temperature
21°C (70°F)
Max Temperature
23°C (73°F)
Chance of Rain
51%
Precipitation
66 mm (2.6 in)
Rainy days
15 days
São Mateus Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in São Mateus - and find the best time to visit.
Best Places in Portugal in September
Find out more about the weather in Portugal and which places have the best travel conditions in this month. See all of Portugal in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in São Mateus in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days.
What To Do in São Mateus in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling10/10 -
Walking10/10 -
Camping8/10 -
Outdoor sports10/10
São Mateus 3-Day Forecast
More climate data for São Mateus
See the full São Mateus climate overview or explore weather in Portugal.
Popular in September
Where to go in September - average daytime high across popular destinations.
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