September weather forecastOlympia, Greece
September
Weather in September
As September rolls in, Olympia experiences a subtle shift in weather. While the city carries forth some of August's warmth, this month ushers in the first signs of the impending autumn. Still, the area remains dry with an average rainfall of 27mm (1.06"), creating ideal conditions to explore the Grecian ruins. The evenings become increasingly cooler providing a delightful contrast to the warm days. This month perfectly balances the dust and heat of summer with the crisp air of fall, offering some of the best weather for outdoor pursuits.Temperature
Olympia's average high-temperature in September is a moderately hot 28°C (82.4°F), marking an insignificant difference from the 30°C (86°F) of August. Olympia reports a substantial plunge from daytime highs during the nights of September, with an average low-temperature of 16°C (60.8°F).Rainfall
In Olympia, during September, the rain falls for 3 days and regularly aggregates up to 27mm (1.06") of precipitation. In Olympia, during the entire year, the rain falls for 91 days and collects up to 776mm (30.55") of precipitation.Daylight
The average length of the day in September in Olympia is 12h and 25min.On the first day of the month, sunrise is at 07:04 and sunset at 20:02. On the last day of September, in Olympia, sunrise is at 07:28 and sunset at 19:18 EEST.
Sunshine
The average sunshine in September is 10h.UV index
The average daily maximum UV index in September in Olympia is 7. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 7 during September translates into the following guidance:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Olympia, Greece
- Average high temperature in September: 28°C
The warmest months (with the highest average high temperature) are July and August (30°C).
The months with the lowest average high temperature are January and February (14°C).
- Average low temperature in September: 16°C
The month with the highest average low temperature is August (19°C).
The coldest months (with the lowest average low temperature) are January and February (6°C).
Average rainfall in September
Olympia, Greece
- Average rainfall in September: 27mm
The wettest month (with the highest rainfall) is December (148mm).
The driest month (with the least rainfall) is July (6mm).
Average rainfall days in September
Olympia, Greece
- Average rainfall days in September: 3 days
The month with the highest number of rainy days is December (14 days).
The months with the least rainy days are July and August (1 days).
Average daylight in September /
Average sunshine in September
Olympia, Greece
- 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: 10h
The month with the most sunshine is July (Average sunshine: 13h).
The month with the least sunshine is December (Average sunshine: 4h).
Average UV index in September
Olympia, Greece
- Average UV index in September: 7
The month with the highest UV index is July (UV index 10).
The months with the lowest UV index are January and December (UV index 2).





