September weather forecastMejillones, Chile
September
Weather in September
The first month of the spring, September, is also an enjoyable month in Mejillones, Chile, with an average temperature ranging between max 18.7°C (65.7°F) and min 13°C (55.4°F).Temperature
September brings a marginal elevation to a still enjoyable 18.7°C (65.7°F) from August's 18.5°C (65.3°F) in Mejillones's average high-temperatures. During September, the temperature tends to dip to an average of 13°C (55.4°F) at night.Humidity
In Mejillones, Chile, the average relative humidity in September is 70%.Rainfall
January through May, September through December are months without rainfall.Daylight
In Mejillones, the average length of the day in September is 11h and 58min.On the first day of September, sunrise is at 06:51 and sunset at 18:31 -04. On the last day of the month, sunrise is at 07:22 and sunset at 19:40 -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
The months with the most sunshine are February, September through December, with an average of 10h of sunshine.UV index
The months with the lowest UV index are March through December, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: A typical high UV index of 5 in September suggests the following recommendations:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mejillones, Chile
- Average high temperature in September: 18.7°C
The warmest month (with the highest average high temperature) is February (23.7°C).
The month with the lowest average high temperature is July (18.3°C).
- Average low temperature in September: 13°C
The month with the highest average low temperature is February (18.8°C).
The coldest month (with the lowest average low temperature) is August (12.6°C).
Average pressure in September
Mejillones, Chile
- Average pressure in September: 1014.9mbar
The month with the highest atmospheric pressure is July (1015.5mbar).
The month with the lowest atmospheric pressure is February (1012mbar).
Average wind speed in September
Mejillones, Chile
- Average wind speed in September: 12.6km/h
The windiest month (with the highest average wind speed) is December (12.8km/h).
The calmest months (with the lowest average wind speed) are May and June (10.9km/h).
Average humidity in September
Mejillones, Chile
- Average humidity in September: 70%
The months with the highest relative humidity are February, March and April (75%).
The months with the lowest relative humidity are June and July (67%).
Average rainfall in September
Mejillones, Chile
- Average rainfall in September: 0mm
The wettest months (with the highest rainfall) are June, July and August (1mm).
The driest months (with the least rainfall) are January, February, March, April, May, September, October, November and December (0mm).
Average rainfall days in September
Mejillones, Chile
- Average rainfall days in September: 0.4 days
The month with the highest number of rainy days is July (1.6 days).
The month with the least rainy days is November (0 days).
Average daylight in September /
Average sunshine in September
Mejillones, Chile
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 30min).
The month with the shortest days is June (Average daylight: 10h and 42min).
- Average sunshine in September: 10h and 0min
The months with the most sunshine are February, September, October, November and December (Average sunshine: 10h and 0min).
The month with the least sunshine is July (Average sunshine: 9h and 48min).
Average sunshine days in September
Mejillones, Chile
- Average sunshine days in September: 29.9 days
The month with the most sunshine days is October (31 days).
The month with the least sunshine days is February (27.2 days).
Average UV index in September
Mejillones, Chile
- Average UV index in September: 5
The months with the highest UV index are January and February (UV index 6).
The months with the lowest UV index are March, April, May, June, July, August, September, October, November and December (UV index 5).
Average cloud cover in September
Mejillones, Chile
- Average cloud cover in September: 2
The month with the most cloud cover is February (Cloud cover 11).
The month with the least cloud cover is September (Cloud cover 2).
Average visibility in September
Mejillones, Chile
- 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).
