The climate in Chalkída during September can be summarized as warm and dry.
September is in the fall / autumn in Chalkída and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 28°C (82°F), whilst at night 16°C (61°F) is normal.
| Daytime temperature | 27.7°C 81.9°F | 
|---|---|
| Nightly temperature | 15.9°C 60.6°F | 
| Average temperature | 21.8°C 71.2°F | 
| Daily sunshine | 10.5 hrs | 
| Avg rainfall | 23 mm 0.9 ins | 
| Rainy days | 2 days | 
| Sea temperature | 23.9°C 75°F | 
| Humidity | 60% | 
| Windspeed | 6.5kph 4 mph | 
On average September is the 4th driest month of the year in Chalkída with around 23mm 0.9 inches of rain making it a dry time to visit. This rainfall is typically spread over 2 days, although this may vary considerably.
On the flip side this corresponds to an average of 10.5 hours of sunshine per day.
				
						
						The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Chalkída in September 2025.
Best places to visit in September
| Hottest month: | July | 31.3°C 88.3°F | 
|---|---|---|
| Driest month: | July | 8mm 0.3ins | 
| Sunniest month: | July | 13.8hrs | 
| Coldest month: | January | 11.7°C 53.1°F | 
| Wettest month: | December | 86mm 3.4ins |