September weather forecastRelva, Portugal
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Relva, Portugal, with an average temperature ranging between max 22.6°C (72.7°F) and min 21.5°C (70.7°F).Temperature
September is marked by an average high-temperature of a pleasant 22.6°C (72.7°F), almost identical to the preceding month. In September, Relva experiences a marginal drop in temperature, with averages of 21.5°C (70.7°F) at night.Humidity
The average relative humidity in September is 77%.Rainfall
In Relva, in September, it is raining for 15.1 days, with typically 36mm (1.42") of accumulated precipitation. In Relva, during the entire year, the rain falls for 162.8 days and collects up to 525mm (20.67") of precipitation.Daylight
In Relva, Portugal, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 07:13 and sunset at 20:11. On the last day of September, in Relva, sunrise is at 07:38 and sunset at 19:27 +00.
Sunshine
In September, the average sunshine in Relva is 8.1h.UV index
July through September, with an average maximum UV index of 6, are months with the highest UV index in Relva. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 6 in September converts into the following recommendations:
Fend off overexposure. Sun protection is vital. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Relva, Portugal
- Average high temperature in September: 22.6°C
The warmest month (with the highest average high temperature) is August (23.2°C).
The month with the lowest average high temperature is March (16°C).
- Average low temperature in September: 21.5°C
The month with the highest average low temperature is August (22.1°C).
The coldest months (with the lowest average low temperature) are February and March (14.7°C).
Average pressure in September
Relva, Portugal
- Average pressure in September: 1020.9mbar
The month with the highest atmospheric pressure is July (1024.4mbar).
The month with the lowest atmospheric pressure is October (1016.9mbar).
Average wind speed in September
Relva, Portugal
- Average wind speed in September: 20.1km/h
The windiest month (with the highest average wind speed) is December (28.9km/h).
The calmest month (with the lowest average wind speed) is July (16.3km/h).
Average humidity in September
Relva, Portugal
- Average humidity in September: 77%
The month with the highest relative humidity is June (82%).
The month with the lowest relative humidity is November (76%).
Average rainfall in September
Relva, Portugal
- Average rainfall in September: 36mm
The wettest month (with the highest rainfall) is December (89mm).
The driest month (with the least rainfall) is July (15mm).
Average rainfall days in September
Relva, Portugal
- Average rainfall days in September: 15.1 days
The month with the highest number of rainy days is October (19.1 days).
The month with the least rainy days is July (9.1 days).
Average daylight in September /
Average sunshine in September
Relva, Portugal
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 8h and 6min
The month with the most sunshine is July (Average sunshine: 9h and 30min).
The months with the least sunshine are November and December (Average sunshine: 5h and 0min).
Average sunshine days in September
Relva, Portugal
- Average sunshine days in September: 9.8 days
The month with the most sunshine days is July (16.3 days).
The month with the least sunshine days is October (7.6 days).
Average UV index in September
Relva, Portugal
- Average UV index in September: 6
The months with the highest UV index are July, August and September (UV index 6).
The months with the lowest UV index are January, February and March (UV index 4).
Average cloud cover in September
Relva, Portugal
- Average cloud cover in September: 40
The month with the most cloud cover is November (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Relva, Portugal
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
