Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The advent of September brings an average high-temperature of a still comfortable 16.3°C (61.3°F), exhibiting minor difference from the previous month. During September, San Marcos's temperature averages to a chilly 6.3°C (43.3°F) at night.Humidity
In San Marcos, the average relative humidity in September is 71%.Rainfall
In San Marcos, Peru, in September, during 20.3 rainfall days, 53mm (2.09") of precipitation is typically accumulated. Throughout the year, in San Marcos, there are 274.3 rainfall days, and 1378mm (54.25") of precipitation is accumulated.Snowfall
In San Marcos, Peru, snow does not fall in August and September.Daylight
In San Marcos, the average length of the day in September is 12h and 4min.On the first day of the month, sunrise is at 06:13 and sunset at 18:11. On the last day of September, in San Marcos, Peru, sunrise is at 05:57 and sunset at 18:07 -05.
Sunshine
In San Marcos, the average sunshine in September is 9.6h.UV index
The months with the highest UV index in San Marcos are September and November, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: An average maximum UV index of 4 in September leads to these recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for San Marcos in September?
What is the average humidity in September in San Marcos?
How many days does it rain in September in San Marcos?
When it does not snow in San Marcos?
Does it snow in San Marcos in September?
What is the average length of the day in September in San Marcos?
What time are sunrise and sunset in September in San Marcos?
How long on average sun shines in September in San Marcos?
What are the months with the highest UV index in San Marcos?
What is the UV index reading in September in San Marcos?
Average temperature in September
San Marcos, Peru
- Average high temperature in September: 16.3°C
The warmest month (with the highest average high temperature) is August (16.6°C).
The months with the lowest average high temperature are February and March (14.1°C).
- Average low temperature in September: 6.3°C
The month with the highest average low temperature is March (7.3°C).
The coldest month (with the lowest average low temperature) is July (4.7°C).
Average pressure in September
San Marcos, Peru
- Average pressure in September: 1015.6mbar
The month with the highest atmospheric pressure is July (1016.3mbar).
The month with the lowest atmospheric pressure is November (1013.4mbar).
Average wind speed in September
San Marcos, Peru
- Average wind speed in September: 10.4km/h
The windiest month (with the highest average wind speed) is July (12.8km/h).
The calmest month (with the lowest average wind speed) is March (6.2km/h).
Average humidity in September
San Marcos, Peru
- Average humidity in September: 71%
The month with the highest relative humidity is March (87%).
The month with the lowest relative humidity is August (68%).
Average rainfall in September
San Marcos, Peru
- Average rainfall in September: 53mm
The wettest month (with the highest rainfall) is March (238mm).
The driest month (with the least rainfall) is August (20mm).
Average rainfall days in September
San Marcos, Peru
- Average rainfall days in September: 20.3 days
The month with the highest number of rainy days is March (30 days).
The month with the least rainy days is August (10.9 days).
Average snowfall in September
San Marcos, Peru
- Average snowfall in September: 0mm
The month with the highest snowfall is November (19mm).
The months with the least snowfall are August and September (0mm).
Average snowfall days in September
San Marcos, Peru
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is October (1.7 days).
The month with the least snowfall days is September (0 days).
Average daylight in September /
Average sunshine in September
San Marcos, Peru
- Average daylight in September: 12h and 1min
The month with the longest days is December (Average daylight: 12h and 30min).
The month with the shortest days is June (Average daylight: 11h and 42min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is October (Average sunshine: 10h and 6min).
The month with the least sunshine is March (Average sunshine: 5h and 54min).
Average sunshine days in September
San Marcos, Peru
- Average sunshine days in September: 6.5 days
The month with the most sunshine days is July (16 days).
The months with the least sunshine days are February and March (0.3 days).
Average UV index in September
San Marcos, Peru
- Average UV index in September: 4
The months with the highest UV index are September and November (UV index 4).
The months with the lowest UV index are January, February, March, April, May, June, July, August, October and December (UV index 3).
Average cloud cover in September
San Marcos, Peru
- Average cloud cover in September: 29
The month with the most cloud cover is March (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in September
San Marcos, Peru
- Average visibility in September: 10km
The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are February and March (7km).
San Marcos, Peru
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