September weather forecastCastro, Chile
September
Weather in September
September acts as a transitionary phase from the chills of winter to the mildness of spring in Castro. There’s a slight upswing in the mean temperatures and a downtick in the amount of rainfall, providing a breather before the rainy season returns in earnest. Winds slow down once again, providing a respite before they take off in later months. Nights are still relatively colder, but the overall weather outlook for Castro in September is a comfortable one, with the UV index at a moderate reading of 2.Temperature
The commencement of September in Castro records an average high-temperature of a fresh 10.5°C (50.9°F), barely varying from August's 9.6°C (49.3°F). Registering an almost steady temperature, Castro's nights in September see an average low of 5.9°C (42.6°F).Humidity
In Castro, the average relative humidity in September is 84%.Rainfall
In September, the rain falls for 19.3 days. Throughout September, 65mm (2.56") of precipitation is accumulated. Throughout the year, there are 218 rainfall days, and 1005mm (39.57") of precipitation is accumulated.Daylight
In September, the average length of the day is 11h and 50min.On the first day of September in Castro, sunrise is at 07:19 and sunset at 18:30 -04. On the last day of the month, sunrise is at 07:28 and sunset at 20:01 -03.
Note: On Sunday, 08. September 2024, at 00:00, Daylight Saving Time starts, and the time zone changes from -04 to -03. Daylight Saving Time lasts until Sunday, 06. April 2025, at 00:00; consequently, the time zone reverts from -03 to -04.
Sunshine
In Castro, the average sunshine in September is 5.4h.UV index
June, July and September, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 2 during September translates into the following directions:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Castro, Chile
- Average high temperature in September: 10.5°C
The warmest months (with the highest average high temperature) are January and February (17.6°C).
The month with the lowest average high temperature is July (9.3°C).
- Average low temperature in September: 5.9°C
The months with the highest average low temperature are January and February (10.9°C).
The coldest month (with the lowest average low temperature) is July (5.6°C).
Average pressure in September
Castro, Chile
- Average pressure in September: 1018.7mbar
The month with the highest atmospheric pressure is September (1018.7mbar).
The month with the lowest atmospheric pressure is June (1015mbar).
Average wind speed in September
Castro, Chile
- Average wind speed in September: 15km/h
The windiest month (with the highest average wind speed) is August (17.8km/h).
The calmest month (with the lowest average wind speed) is March (12.8km/h).
Average humidity in September
Castro, Chile
- Average humidity in September: 84%
The months with the highest relative humidity are June and August (87%).
The month with the lowest relative humidity is January (79%).
Average rainfall in September
Castro, Chile
- Average rainfall in September: 65mm
The wettest month (with the highest rainfall) is May (126mm).
The driest month (with the least rainfall) is January (37mm).
Average rainfall days in September
Castro, Chile
- Average rainfall days in September: 19.3 days
The month with the highest number of rainy days is August (21.7 days).
The month with the least rainy days is February (13.6 days).
Average daylight in September /
Average sunshine in September
Castro, Chile
- Average daylight in September: 11h and 48min
The month with the longest days is December (Average daylight: 15h and 12min).
The month with the shortest days is June (Average daylight: 9h and 6min).
- Average sunshine in September: 5h and 24min
The month with the most sunshine is January (Average sunshine: 8h and 24min).
The month with the least sunshine is June (Average sunshine: 3h and 30min).
Average sunshine days in September
Castro, Chile
- Average sunshine days in September: 8.5 days
The month with the most sunshine days is January (12.1 days).
The month with the least sunshine days is August (7.2 days).
Average UV index in September
Castro, Chile
- Average UV index in September: 2
The months with the highest UV index are January, February, March and December (UV index 4).
The months with the lowest UV index are June, July and September (UV index 2).
Average cloud cover in September
Castro, Chile
- Average cloud cover in September: 58
The months with the most cloud cover are June and August (Cloud cover 64).
The month with the least cloud cover is January (Cloud cover 44).
Average visibility in September
Castro, Chile
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
