Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
The arrival of September corresponds with a shift in temperature, down from a hot 32.7°C (90.9°F) in August to a moderately hot 27.4°C (81.3°F). During the month of September, Alameda's nighttime temperature lowers to an average of 16.6°C (61.9°F).Heat index
The heat index value for September is computed to be 28°C (82.4°F). Persisting in activity during exposure could lead to weariness and subsequently to heat cramps.Be informed that the heat index values are oriented around shady conditions and gentle breezes. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is the outcome of merging air's temperature and its humidity metrics. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
Humidity
In September, the average relative humidity is 57%.Rainfall
In Alameda, Spain, in September, it is raining for 6.7 days, with typically 22mm (0.87") of accumulated precipitation. In Alameda, during the entire year, the rain falls for 96.3 days and collects up to 371mm (14.61") of precipitation.Snowfall
March through December are months without snowfall.Daylight
In Alameda, the average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 07:49 and sunset at 20:47. On the last day of the month, sunrise is at 08:13 and sunset at 20:03 CEST.
Sunshine
In September, the average sunshine in Alameda is 9.3h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: In September, the average maximum UV index of 5 translates into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Around midday, solar radiation is most harmful; hence, exposure should be limited. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Alameda in September?
What is the average humidity in September in Alameda?
How much does it rain in Alameda in September?
When it does not snow in Alameda?
What is the average length of the day in September in Alameda?
When is the sunrise / sunset in September in Alameda?
How long on average sun shines in September in Alameda?
What is the UV index intensity in September in Alameda?
Average temperature in September
Alameda, Spain
- Average high temperature in September: 27.4°C
The warmest month (with the highest average high temperature) is July (33.1°C).
The month with the lowest average high temperature is January (12.3°C).
- Average low temperature in September: 16.6°C
The month with the highest average low temperature is August (19.9°C).
The coldest month (with the lowest average low temperature) is February (4.1°C).
Average pressure in September
Alameda, Spain
- Average pressure in September: 1016.5mbar
The month with the highest atmospheric pressure is December (1022.7mbar).
The month with the lowest atmospheric pressure is July (1015.1mbar).
Average wind speed in September
Alameda, Spain
- Average wind speed in September: 7.8km/h
The windiest months (with the highest average wind speed) are March and April (9.8km/h).
The calmest month (with the lowest average wind speed) is September (7.8km/h).
Average humidity in September
Alameda, Spain
- Average humidity in September: 57%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is July (42%).
Average rainfall in September
Alameda, Spain
- Average rainfall in September: 22mm
The wettest month (with the highest rainfall) is November (53mm).
The driest month (with the least rainfall) is July (2mm).
Average rainfall days in September
Alameda, Spain
- Average rainfall days in September: 6.7 days
The month with the highest number of rainy days is March (14 days).
The month with the least rainy days is July (2.3 days).
Average snowfall in September
Alameda, Spain
- Average snowfall in September: 0mm
The months with the highest snowfall are January and February (1mm).
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Alameda, Spain
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Alameda, Spain
- Average daylight in September: 12h and 2min
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 42min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is June (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 7h and 6min).
Average sunshine days in September
Alameda, Spain
- Average sunshine days in September: 22.1 days
The month with the most sunshine days is July (28.3 days).
The month with the least sunshine days is March (15.4 days).
Average UV index in September
Alameda, Spain
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Alameda, Spain
- Average cloud cover in September: 18
The months with the most cloud cover are January and March (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 6).
Average visibility in September
Alameda, Spain
- Average visibility in September: 10km
The months with the highest visibility are May, June, July, August, September and October (10km).
The month with the lowest visibility is January (8km).
