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
With the advent of September, San Juan's high-temperatures adjust to an agreeable 20.5°C (68.9°F), closely aligning with the preceding month. During the month of September, the temperature generally drops to a low average of 9°C (48.2°F).Humidity
The average relative humidity in September in San Juan is 38%.Rainfall
In September, the rain falls for 1.9 days. Throughout September, 2mm (0.08") of precipitation is accumulated. In San Juan, during the entire year, the rain falls for 50.2 days and collects up to 94mm (3.7") of precipitation.Snowfall
Months with snowfall are July through September. September is the last month it regularly snows in San Juan. During 0.4 snowfall days, in September, San Juan aggregates 2mm (0.08") of snow. Throughout the year, in San Juan, there are 1.1 snowfall days, and 8mm (0.31") of snow is accumulated.Daylight
In September, the average length of the day in San Juan is 11h and 55min.On the first day of the month, sunrise is at 07:49 and sunset at 19:18. On the last day of September, in San Juan, sunrise is at 07:12 and sunset at 19:35 -03.
Sunshine
August, September and November, with an average of 9.9h of sunshine, are months with the most sunshine.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: A daily high UV index of 5 in September leads to these guidelines:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Frequently asked questions
What is the usual temperature for San Juan in September?
What is the average humidity in September in San Juan?
How much does it rain in San Juan in September?
What is the last month it snows in San Juan?
How many hours of daylight does San Juan have in September?
When is the sunrise / sunset in September in San Juan?
What are the months with the most sunshine in San Juan?
How many hours of sunshine does San Juan have in September?
What is the UV index reading in September in San Juan?
Average temperature in September
San Juan, Argentina
- Average high temperature in September: 20.5°C
The warmest month (with the highest average high temperature) is January (30.6°C).
The month with the lowest average high temperature is July (14.6°C).
- Average low temperature in September: 9°C
The month with the highest average low temperature is January (19.4°C).
The coldest month (with the lowest average low temperature) is July (4.5°C).
Average pressure in September
San Juan, Argentina
- Average pressure in September: 1016.3mbar
The month with the highest atmospheric pressure is July (1018.1mbar).
The month with the lowest atmospheric pressure is December (1010.2mbar).
Average wind speed in September
San Juan, Argentina
- Average wind speed in September: 11.1km/h
The windiest months (with the highest average wind speed) are October and November (12.2km/h).
The calmest month (with the lowest average wind speed) is May (8.8km/h).
Average humidity in September
San Juan, Argentina
- Average humidity in September: 38%
The months with the highest relative humidity are April and May (52%).
The month with the lowest relative humidity is November (35%).
Average rainfall in September
San Juan, Argentina
- Average rainfall in September: 2mm
The wettest month (with the highest rainfall) is January (29mm).
The driest months (with the least rainfall) are June and July (1mm).
Average rainfall days in September
San Juan, Argentina
- Average rainfall days in September: 1.9 days
The month with the highest number of rainy days is January (9.2 days).
The month with the least rainy days is August (1.3 days).
Average snowfall in September
San Juan, Argentina
- Average snowfall in September: 2mm
The month with the highest snowfall is July (4mm).
The months with the least snowfall are January, February, March, April, May, June, October, November and December (0mm).
Average snowfall days in September
San Juan, Argentina
- Average snowfall days in September: 0.4 days
The months with the highest number of snowfall days are July and September (0.4 days).
The months with the least snowfall days are January, February, March, April, May, June, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
San Juan, Argentina
- Average daylight in September: 11h and 5min
The month with the longest days is December (Average daylight: 14h and 12min).
The month with the shortest days is June (Average daylight: 10h and 6min).
- Average sunshine in September: 9h and 5min
The months with the most sunshine are August, September and November (Average sunshine: 9h and 54min).
The months with the least sunshine are March, April, May and October (Average sunshine: 9h and 42min).
Average sunshine days in September
San Juan, Argentina
- Average sunshine days in September: 26.9 days
The month with the most sunshine days is July (29.7 days).
The month with the least sunshine days is January (15.4 days).
Average UV index in September
San Juan, Argentina
- Average UV index in September: 5
The month with the highest UV index is January (UV index 7).
The months with the lowest UV index are May, June and July (UV index 3).
Average cloud cover in September
San Juan, Argentina
- Average cloud cover in September: 9
The months with the most cloud cover are March, April and May (Cloud cover 12).
The month with the least cloud cover is August (Cloud cover 8).
Average visibility in September
San Juan, Argentina
- 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).
San Juan, Argentina
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