September weather forecastArnissa, Greece

September

Weather in September

The first month of the autumn, September, is still a warm month in Arnissa, Greece, with an average temperature fluctuating between 13.7°C (56.7°F) and 24.5°C (76.1°F).

Temperature

The arrival of September corresponds with a reduction in the average high-temperature, down from August's moderately hot 29.8°C (85.6°F) to a still warm 24.5°C (76.1°F). Arnissa's temperature in September lowers to a consistent average of 13.7°C (56.7°F) during the nights.

Humidity

The average relative humidity in September is 64%.

Rainfall

In September, the rain falls for 12.2 days. Throughout September, 61mm (2.4") of precipitation is accumulated. In Arnissa, during the entire year, the rain falls for 168 days and collects up to 811mm (31.93") of precipitation.

Snowfall

In Arnissa, snow does not fall in April through October.

Daylight

The average length of the day in September in Arnissa is 12h and 28min.
On the first day of September in Arnissa, sunrise is at 07:00 and sunset at 20:04. On the last day of the month, sunrise is at 07:28 and sunset at 19:16 EEST.

Sunshine

In September, the average sunshine is 9.1h.

UV index

In September, the average daily maximum UV index in Arnissa is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A daily maximum UV index of 5 in September translates into the following instructions:
Be vigilant - Preventing sunburn is recommended. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.

Updated: Feb 14, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In Arnissa, in September, the average high-temperature is 24.5°C (76.1°F), and the average low-temperature is 13.7°C (56.7°F). In August, the average heat index (a.k.a. 'feels like', 'real feel'), which factors the actual air temperature with the relative humidity, is calculated to be 32°C (89.6°F).

In September, the average relative humidity in Arnissa, Greece, is 64%.

In Arnissa, in September, it is raining for 12.2 days, with typically 61mm (2.4") of accumulated precipitation.

In Arnissa, Greece, snow does not fall in April through October.

The average day length in September in Arnissa, Greece, is 12h and 28min.

In September, on the first day of the month, sunrise is at 07:00 and sunset at 20:04. On the last day of the month, in Arnissa, sunrise is at 07:28 and sunset at 19:16 EEST.

In Arnissa, the average sunshine duration in September is 9.1h.

In September, the average daily maximum UV index in Arnissa, Greece, is 5. A UV Index of 3 to 5 symbolizes a moderate health threat from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

29.8°C

24.5°C

18.7°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

7.6km/h

7.2km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

16.9

15.5

16.3

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Arnissa, Greece

Average high temperature in September: 24.5°C

The warmest month (with the highest average high temperature) is August (29.8°C).
The month with the lowest average high temperature is January (6.3°C).

Average low temperature in September: 13.7°C

The month with the highest average low temperature is August (17.1°C).
The coldest month (with the lowest average low temperature) is January (-0.1°C).

Average pressure in September
Arnissa, Greece

Average pressure in September: 1016.1mbar

The month with the highest atmospheric pressure is December (1019.6mbar).
The month with the lowest atmospheric pressure is July (1013.2mbar).

Average wind speed in September
Arnissa, Greece

Average wind speed in September: 6.7km/h

The windiest months (with the highest average wind speed) are February and March (7.7km/h).
The calmest month (with the lowest average wind speed) is November (6.2km/h).

Average humidity in September
Arnissa, Greece

Average humidity in September: 64%

The months with the highest relative humidity are January and February (79%).
The month with the lowest relative humidity is August (56%).

Average rainfall in September
Arnissa, Greece

Average rainfall in September: 61mm

The wettest month (with the highest rainfall) is November (86mm).
The driest months (with the least rainfall) are February and October (53mm).

Average rainfall days in September
Arnissa, Greece

Average rainfall days in September: 12.2 days

The month with the highest number of rainy days is June (18.7 days).
The month with the least rainy days is December (10.6 days).

Average snowfall in September
Arnissa, Greece

Average snowfall in September: 0mm

The month with the highest snowfall is January (81mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days in September
Arnissa, Greece

Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (3.5 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Arnissa, Greece

Average daylight in September: 12h and 30min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

Average sunshine in September: 9h and 6min

The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).