September weather forecastArequipa, Peru
September
Weather in September
September signals the start of spring in Arequipa, and the weather responds with a slight increase in temperature. The sun graces Arequipa's skies for more extended periods, with a total of 12 hours of daylight. As temperatures ramp upwards, so too does the rainfall, albeit at a relatively unhurried pace compared to the dramatic climbs in temperature. The slight upturn in the strength of winds brings a refreshing change to the atmosphere. September's significant jump in temperature from a high of 17.4°C (63.3°F) in August to 17.8°C (64°F) aligns with the advent of spring.Temperature
On the advent of September, Arequipa's average high-temperature exhibits a minor adjustment to a still comfortable 17.8°C (64°F) from August's 17.4°C (63.3°F). An average low-temperature of 7.7°C (45.9°F) is recorded during the nights in September.Humidity
In Arequipa, the average relative humidity in September is 40%.Rainfall
In September, the rain falls for 2.7 days. Throughout September, 3mm (0.12") of precipitation is accumulated. In Arequipa, during the entire year, the rain falls for 84.2 days and collects up to 260mm (10.24") of precipitation.Daylight
In Arequipa, the average length of the day in September is 12h and 1min.On the first day of the month, sunrise is at 05:51 and sunset at 17:40. On the last day of September, sunrise is at 05:28 and sunset at 17:43 -05.
Sunshine
In September, the average sunshine is 9.9h.UV index
The months with the highest UV index are January through December, with an average maximum UV index of 4. The months with the lowest UV index are January through December, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Ensure safety - Imperative it is to shield skin and eyes from damage. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Arequipa, Peru
- Average high temperature in September: 17.8°C
The warmest month (with the highest average high temperature) is October (17.9°C).
The month with the lowest average high temperature is February (15.2°C).
- Average low temperature in September: 7.7°C
The month with the highest average low temperature is February (10.7°C).
The coldest month (with the lowest average low temperature) is July (6.7°C).
Average pressure in September
Arequipa, Peru
- Average pressure in September: 1017.3mbar
The months with the highest atmospheric pressure are June and July (1018.2mbar).
The months with the lowest atmospheric pressure are February and December (1015.1mbar).
Average wind speed in September
Arequipa, Peru
- Average wind speed in September: 8km/h
The windiest month (with the highest average wind speed) is January (9.6km/h).
The calmest month (with the lowest average wind speed) is June (6.5km/h).
Average humidity in September
Arequipa, Peru
- Average humidity in September: 40%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is August (35%).
Average rainfall in September
Arequipa, Peru
- Average rainfall in September: 3mm
The wettest month (with the highest rainfall) is January (81mm).
The driest months (with the least rainfall) are June and August (1mm).
Average rainfall days in September
Arequipa, Peru
- Average rainfall days in September: 2.7 days
The month with the highest number of rainy days is February (18.2 days).
The month with the least rainy days is August (0.8 days).
Average daylight in September /
Average sunshine in September
Arequipa, Peru
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 6min).
The month with the shortest days is June (Average daylight: 11h and 12min).
- Average sunshine in September: 9h and 54min
The month with the most sunshine is December (Average sunshine: 11h and 6min).
The month with the least sunshine is July (Average sunshine: 7h and 36min).
Average sunshine days in September
Arequipa, Peru
- Average sunshine days in September: 25.1 days
The month with the most sunshine days is August (28.3 days).
The month with the least sunshine days is February (8.5 days).
Average UV index in September
Arequipa, Peru
- Average UV index in September: 4
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 4).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 4).
Average cloud cover in September
Arequipa, Peru
- Average cloud cover in September: 7
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 3).
Average visibility in September
Arequipa, Peru
- Average visibility in September: 10km
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January and February (9km).
