September weather forecastLima, Peru
September
Weather in September
September signals the onset of spring in Lima with a fluctuation in temperatures. The days start to lengthen and the city enjoys an average of 12h of daylight. The pressure drops slightly to 1016.1mb, bringing cooler winds from the sea. With sea temperatures rising to 15.8°C (60.4°F), an improvement in beach conditions is seen. Thus, September becomes a transitional month with a mixed bag of weather conditions in Lima.Temperature
On the advent of September, Lima's average high-temperature exhibits a minor adjustment to a still agreeable 20.5°C (68.9°F) from August's 20°C (68°F). An average nighttime temperature of 15.3°C (59.5°F) is noted in Lima, Peru, during the month of September.Humidity
August and September, with an average relative humidity of 75%, are the least humid months.Rainfall
In September, in Lima, the rain falls for 1.3 days. Throughout September, 1mm (0.04") of precipitation is accumulated. In Lima, Peru, during the entire year, the rain falls for 22.6 days and collects up to 18mm (0.71") of precipitation.Sea temperature
The month with the coldest seawater in Lima is September, with an average sea temperature of 15.8°C (60.4°F).Note: In water with a temperature of 15.8°C (60.4°F), most people do not enjoy swimming. As the temperature descends from 21°C (69.8°F) to 15°C (59°F), breathing becomes increasingly difficult to control.
Daylight
The average length of the day in September is 12h and 2min.On the first day of the month, sunrise is at 06:11 and sunset at 18:04. On the last day of September, sunrise is at 05:51 and sunset at 18:04 -05.
Sunshine
The average sunshine in September is 10.5h.UV index
May through October, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 5 in September converts into the following recommendations:
Exercise prevention - Warding off sunburn is urged. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lima, Peru
- Average high temperature in September: 20.5°C
The warmest month (with the highest average high temperature) is February (25.4°C).
The month with the lowest average high temperature is August (20°C).
- Average low temperature in September: 15.3°C
The month with the highest average low temperature is February (21.4°C).
The coldest month (with the lowest average low temperature) is August (14.9°C).
Average pressure in September
Lima, Peru
- Average pressure in September: 1016.1mbar
The month with the highest atmospheric pressure is August (1016.4mbar).
The month with the lowest atmospheric pressure is February (1013.8mbar).
Average wind speed in September
Lima, Peru
- Average wind speed in September: 13.1km/h
The windiest month (with the highest average wind speed) is September (13.1km/h).
The calmest month (with the lowest average wind speed) is February (10.4km/h).
Average humidity in September
Lima, Peru
- Average humidity in September: 75%
The month with the highest relative humidity is December (79%).
The months with the lowest relative humidity are August and September (75%).
Average rainfall in September
Lima, Peru
- Average rainfall in September: 1mm
The wettest month (with the highest rainfall) is February (4mm).
The driest month (with the least rainfall) is May (0mm).
Average rainfall days in September
Lima, Peru
- Average rainfall days in September: 1.3 days
The month with the highest number of rainy days is March (5.7 days).
The month with the least rainy days is November (0.2 days).
Average sea temperature in September
Lima, Peru
- Average sea temperature in September: 15.8°C
The best month for swimming (with the highest average sea temperature) is March (20.9°C).
The coldest month (with the lowest average sea temperature) is September (15.8°C).
Average daylight in September /
Average sunshine in September
Lima, Peru
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 12h and 48min).
The month with the shortest days is June (Average daylight: 11h and 24min).
- Average sunshine in September: 10h and 30min
The month with the most sunshine is October (Average sunshine: 12h and 0min).
The month with the least sunshine is June (Average sunshine: 7h and 24min).
Average sunshine days in September
Lima, Peru
- Average sunshine days in September: 28.6 days
The months with the most sunshine days are August and October (30 days).
The month with the least sunshine days is February (21.1 days).
Average UV index in September
Lima, Peru
- Average UV index in September: 5
The months with the highest UV index are January, February, March, April, November and December (UV index 6).
The months with the lowest UV index are May, June, July, August, September and October (UV index 5).
Average cloud cover in September
Lima, Peru
- Average cloud cover in September: 13
The month with the most cloud cover is January (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 9).
Average visibility in September
Lima, Peru
- 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).
