Temperatures in September
It's warm in September in Costa Rei with an average temperature of 29°C. Temperatures this month range from a low of 26°C to a high of 30°C. At night, you can expect temperatures between 18°C and 23°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Costa Rei in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in Costa Rei with hot temperatures, averaging around 30°C during the day and nights close to 21°C. There’s little chance of precipitation. The weather is mostly sunny and dry.
Mid-September
By mid-September, the average daytime temperature stays the same at 30°C, with nights close to 21°C. Not much precipitation expected during this period. It’s mostly dry with sunshine.
End of September
By the end of September, the average daytime temperature in Costa Rei will be around 28°C, with nights close to 19°C. Barely any chance of precipitation. The weather will mostly be dry with lots of sunshine.
As it gets cooler in the evening, it’s best to wear layers.
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Precipitation in September
In September, there is an average of 29 mm of precipitation, spread over 4 days. The wind speed is around 5 Bft, mostly coming from the South.
The precipitation chance averages 14% per day this month. Though that seems low, there are also a few days with a higher chance of precipitation.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for Costa Rei. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Costa Rei in September |
London | ||
|---|---|---|---|
 Average Temperature |
29°C | 20°C | |
 High Temp |
30°C | 22°C | |
| Low Temp |
26°C | 17°C | |
 Total Precipitation |
29 mm | 44 mm | |
| Rainy Days |
4 days | 8 days | |
August
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is September a good time to visit Costa Rei?
Want nice weather? Then September is a great time to be in Costa Rei. You’ll have pleasant temperatures and not too much rain this month.
Temperature records for Costa Rei in September
With 35°C, Costa Rei hit the highest temperature in the last 10 years in September 2015. The lowest daytime temperature in this month was 19°C in 2020. The extreme night temperatures ranged from a low of 11°C to a high of 26°C.
Check out the climate of Costa Rei for all months and discover the best travel time
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Daily Temperature in September in Costa Rei
This chart shows the average daily temperatures, both day and night, for each day in September in Costa Rei, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in Costa Rei
The chart below shows the average daily precipitation in September for Costa Rei, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 4 days of rain in Costa Rei.
Daily UV Index in September in Costa Rei
This chart shows the average daily UV index in September in Costa Rei, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Costa Rei Over the Years
This chart shows the average temperature in September in Costa Rei, measured in degrees Celsius, over the past years.
Total Precipitation in September in Costa Rei Over the Years
This chart shows the average precipitation in September in Costa Rei, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Costa Rei
Click on a specific day in September for detailed info on the typical weather on that day in Costa Rei. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Costa Rei
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Average Weather in Costa Rei by Month
Click on a month below to see detailed weather info for Costa Rei. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Costa Rei for all months at once
