September weather forecastJelsa, Croatia
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Jelsa, Croatia, with an average temperature varying between 23.4°C (74.1°F) and 20°C (68°F).Temperature
The transition to September results in a modest reduction in average high-temperature, moving from a moderately hot 27.3°C (81.1°F) in August to a still warm 23.4°C (74.1°F). Jelsa records a negligible downturn from daytime temperatures, averaging a low of 20°C (68°F) in the month of September.Humidity
In September, the average relative humidity in Jelsa is 65%.Rainfall
In September, in Jelsa, the rain falls for 7.2 days. Throughout September, 11mm (0.43") of precipitation is accumulated. In Jelsa, during the entire year, the rain falls for 97.2 days and collects up to 202mm (7.95") of precipitation.Snowfall
In Jelsa, snow does not fall in January, April through December.Sea temperature
In September, the average sea temperature is 23.9°C (75°F).Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 23.9°C (75°F) water may be enjoyable. (FYI: The official water temperature required for the Olympic swimming competition is 25°C (77°F) to 28°C (82.4°F).)
Daylight
In September, the average length of the day in Jelsa is 12h and 30min.On the first day of the month, sunrise is at 06:18 and sunset at 19:28. On the last day of September, sunrise is at 06:49 and sunset at 18:36 CEST.
Sunshine
In Jelsa, Croatia, the average sunshine in September is 10.7h.UV index
In Jelsa, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In September, a daily maximum UV index of 5 leads to the following instructions:
Put precautions into practice - Guidance to elude sunburn is provided. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Warning! The reflection of sand and water increases the UV dose.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Jelsa, Croatia
- Average high temperature in September: 23.4°C
The warmest month (with the highest average high temperature) is August (27.3°C).
The month with the lowest average high temperature is January (10.2°C).
- Average low temperature in September: 20°C
The month with the highest average low temperature is August (23.4°C).
The coldest month (with the lowest average low temperature) is January (7.4°C).
Average pressure in September
Jelsa, Croatia
- Average pressure in September: 1016mbar
The month with the highest atmospheric pressure is December (1018.9mbar).
The month with the lowest atmospheric pressure is July (1013.7mbar).
Average wind speed in September
Jelsa, Croatia
- Average wind speed in September: 14.2km/h
The windiest month (with the highest average wind speed) is February (20.4km/h).
The calmest month (with the lowest average wind speed) is August (12.1km/h).
Average humidity in September
Jelsa, Croatia
- Average humidity in September: 65%
The month with the highest relative humidity is November (72%).
The months with the lowest relative humidity are July and August (64%).
Average rainfall in September
Jelsa, Croatia
- Average rainfall in September: 11mm
The wettest month (with the highest rainfall) is November (44mm).
The driest month (with the least rainfall) is August (7mm).
Average rainfall days in September
Jelsa, Croatia
- Average rainfall days in September: 7.2 days
The month with the highest number of rainy days is November (11.1 days).
The month with the least rainy days is August (3.1 days).
Average snowfall in September
Jelsa, Croatia
- Average snowfall in September: 0mm
The month with the highest snowfall is February (2mm).
The months with the least snowfall are January, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Jelsa, Croatia
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.6 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature in September
Jelsa, Croatia
- Average sea temperature in September: 23.9°C
The best month for swimming (with the highest average sea temperature) is August (25°C).
The coldest months (with the lowest average sea temperature) are January and February (13.9°C).
Average daylight in September /
Average sunshine in September
Jelsa, Croatia
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 10h and 42min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The months with the least sunshine are January and February (Average sunshine: 5h and 42min).
Average sunshine days in September
Jelsa, Croatia
- Average sunshine days in September: 20.5 days
The month with the most sunshine days is August (25 days).
The months with the least sunshine days are February and November (16.5 days).
Average UV index in September
Jelsa, Croatia
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in September
Jelsa, Croatia
- Average cloud cover in September: 18
The months with the most cloud cover are January and February (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 9).
Average visibility in September
Jelsa, Croatia
- 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).
