September weather forecastConstantine, Algeria
September
Weather in September
The arrival of September signals the beginning of autumn. The temperature takes a substantial dip to 28.4°C (83.1°F), following the trend of the receding summer. The rainfall increases to 22mm (0.87"), marking the start of the wetter months in Constantine. Despite these changes, the frequency of sunshine remains high, ensuring the city is well-lit during the day. This month marks the end of the long daylight hours, paving the way for shorter days as the year approaches its end.Temperature
In the transition to September, Constantine observes a drop in the average high-temperature, moving from a tropical 33.7°C (92.7°F) in August to a moderately hot 28.4°C (83.1°F). Constantine experiences an average low-temperature of 18°C (64.4°F) in the month of September.Heat index
The heat index for September is appraised at a hot 30°C (86°F). If activity and exposure persist, they could induce fatigue, leading to possible heat cramps.Heat index readings emphasize conditions of light breezes and shaded spots. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', takes into account both air temperature and humidity to illustrate what people actually feel. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Humidity
In Constantine, the average relative humidity in September is 57%.Rainfall
In Constantine, during September, the rain falls for 10.9 days and regularly aggregates up to 22mm (0.87") of precipitation. In Constantine, during the entire year, the rain falls for 117.9 days and collects up to 268mm (10.55") of precipitation.Snowfall
April through November are months without snowfall.Daylight
The average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 06:05 and sunset at 19:01. On the last day of September, sunrise is at 06:28 and sunset at 18:18 CET.
Sunshine
In September, the average sunshine is 9.5h.UV index
In Constantine, Algeria, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index, 6 during September, leads to the following recommendations:
Ward off overexposure. Defence against solar harm is crucial. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Constantine, Algeria
- Average high temperature in September: 28.4°C
The warmest month (with the highest average high temperature) is July (34.5°C).
The month with the lowest average high temperature is January (12.2°C).
- Average low temperature in September: 18°C
The month with the highest average low temperature is August (21.4°C).
The coldest month (with the lowest average low temperature) is February (3.2°C).
Average pressure in September
Constantine, Algeria
- Average pressure in September: 1016.6mbar
The month with the highest atmospheric pressure is December (1021.7mbar).
The month with the lowest atmospheric pressure is April (1014.5mbar).
Average wind speed in September
Constantine, Algeria
- Average wind speed in September: 6.9km/h
The windiest month (with the highest average wind speed) is March (8.8km/h).
The calmest month (with the lowest average wind speed) is September (6.9km/h).
Average humidity in September
Constantine, Algeria
- Average humidity in September: 57%
The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is July (41%).
Average rainfall in September
Constantine, Algeria
- Average rainfall in September: 22mm
The wettest month (with the highest rainfall) is March (40mm).
The driest month (with the least rainfall) is July (6mm).
Average rainfall days in September
Constantine, Algeria
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is April (14.2 days).
The month with the least rainy days is July (4.4 days).
Average snowfall in September
Constantine, Algeria
- Average snowfall in September: 0mm
The months with the highest snowfall are January and February (17mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Constantine, Algeria
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.5 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Constantine, Algeria
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 9h and 30min
The months with the most sunshine are June and July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 6h and 0min).
Average sunshine days in September
Constantine, Algeria
- Average sunshine days in September: 15.1 days
The month with the most sunshine days is July (23.3 days).
The month with the least sunshine days is April (13.4 days).
Average UV index in September
Constantine, Algeria
- Average UV index in September: 6
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
Constantine, Algeria
- Average cloud cover in September: 21
The month with the most cloud cover is January (Cloud cover 39).
The month with the least cloud cover is July (Cloud cover 10).
Average visibility in September
Constantine, Algeria
- Average visibility in September: 10km
The months with the highest visibility are June, July, August, September and October (10km).
The months with the lowest visibility are January, March and April (8km).
