September weather forecastTomar, Portugal
September
Weather in September
The first month of the autumn, September, is still a warm month in Tomar, Portugal, with temperature in the range of an average low of 14.7°C (58.5°F) and an average high of 28.6°C (83.5°F).Temperature
The average high-temperature during September registers at a warm 28.6°C (83.5°F), maintaining a close resemblance to the previous month. Throughout September nights, Tomar reports a steady thermal contrast from the day, with an average low-temperature of 14.7°C (58.5°F).Heat index
During September, the heat index is computed to be a tropical 31°C (87.8°F). Prolonged exposure combined with continuous activity could lead to exhaustion, and possibly heat cramps.Heat index's context suggests values are appropriate for shady areas and slight breezes. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
Humidity
In September, the average relative humidity in Tomar is 61%.Rainfall
In Tomar, in September, during 4.8 rainfall days, 19mm (0.75") of precipitation is typically accumulated. In Tomar, Portugal, during the entire year, the rain falls for 94.6 days and collects up to 345mm (13.58") of precipitation.Daylight
The average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 07:02 and sunset at 20:04. On the last day of the month, sunrise is at 07:29 and sunset at 19:17 WEST.
Sunshine
In Tomar, the average sunshine in September is 9.1h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: A maximum high UV index of 5 in September translates into the following recommendations:
Take precautions - Protection against sun damage is advised. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Tomar, Portugal
- Average high temperature in September: 28.6°C
The warmest month (with the highest average high temperature) is August (31.3°C).
The month with the lowest average high temperature is January (13.4°C).
- Average low temperature in September: 14.7°C
The months with the highest average low temperature are July and August (15.3°C).
The coldest month (with the lowest average low temperature) is January (5.8°C).
Average pressure in September
Tomar, Portugal
- Average pressure in September: 1016.6mbar
The month with the highest atmospheric pressure is December (1022.7mbar).
The month with the lowest atmospheric pressure is April (1015.4mbar).
Average wind speed in September
Tomar, Portugal
- Average wind speed in September: 9.7km/h
The windiest month (with the highest average wind speed) is July (12.2km/h).
The calmest month (with the lowest average wind speed) is September (9.7km/h).
Average humidity in September
Tomar, Portugal
- Average humidity in September: 61%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is August (60%).
Average rainfall in September
Tomar, Portugal
- Average rainfall in September: 19mm
The wettest month (with the highest rainfall) is April (54mm).
The driest month (with the least rainfall) is July (2mm).
Average rainfall days in September
Tomar, Portugal
- Average rainfall days in September: 4.8 days
The month with the highest number of rainy days is April (14.1 days).
The month with the least rainy days is August (2.3 days).
Average daylight in September /
Average sunshine in September
Tomar, Portugal
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 9h and 6min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in September
Tomar, Portugal
- Average sunshine days in September: 25 days
The month with the most sunshine days is July (28.4 days).
The month with the least sunshine days is April (14.6 days).
Average UV index in September
Tomar, Portugal
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Tomar, Portugal
- Average cloud cover in September: 21
The month with the most cloud cover is January (Cloud cover 45).
The months with the least cloud cover are July and August (Cloud cover 16).
Average visibility in September
Tomar, Portugal
- Average visibility in September: 9km
The months with the highest visibility are February, March, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January and April (8km).
