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 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
September
Weather in September
Temperature
The advent of September denotes an average high-temperature of a still refreshing 18.2°C (64.8°F), subtly different from August's 18.8°C (65.8°F). Throughout September, an average nighttime temperature of 9.7°C (49.5°F) is experienced.Humidity
The most humid month is September, with an average relative humidity of 86%.Rainfall
In September, the rain falls for 28 days. Throughout September, 224mm (8.82") of precipitation is accumulated. Throughout the year, there are 211.5 rainfall days, and 1407mm (55.39") of precipitation is accumulated.Daylight
In Chapultepec, the average length of the day in September is 12h and 14min.On the first day of September, sunrise is at 6:23 am and sunset at 6:52 pm. On the last day of the month, sunrise is at 6:28 am and sunset at 6:27 pm CST.
Sunshine
The average sunshine in September is 8.3h.UV index
The months with the lowest UV index are September and October, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 3 during September translates into the following directions:
Prioritize safety - Suggestions to prevent sun damage are offered. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Chapultepec in September?
What is the most humid month?
What is the average humidity in September?
How much does it rain in Chapultepec in September?
How many hours of daylight does Chapultepec have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Chapultepec have in September?
When is the lowest UV index?
How high is the UV index in September?
Average temperature in September
Chapultepec, Mexico
- Average high temperature in September: 18.2°C
The warmest month (with the highest average high temperature) is April (22.8°C).
The month with the lowest average high temperature is January (17.2°C).
- Average low temperature in September: 9.7°C
The month with the highest average low temperature is May (10.8°C).
The coldest month (with the lowest average low temperature) is January (4.9°C).
Average pressure in September
Chapultepec, Mexico
- Average pressure in September: 1015.2mbar
The month with the highest atmospheric pressure is January (1017.7mbar).
The month with the lowest atmospheric pressure is May (1013.7mbar).
Average wind speed in September
Chapultepec, Mexico
- Average wind speed in September: 5.1km/h
The windiest months (with the highest average wind speed) are March and April (6.8km/h).
The calmest month (with the lowest average wind speed) is July (4.4km/h).
Average humidity in September
Chapultepec, Mexico
- Average humidity in September: 86%
The month with the highest relative humidity is September (86%).
The month with the lowest relative humidity is April (47%).
Average rainfall in September
Chapultepec, Mexico
- Average rainfall in September: 224mm
The wettest month (with the highest rainfall) is July (301mm).
The driest month (with the least rainfall) is December (8mm).
Average rainfall days in September
Chapultepec, Mexico
- Average rainfall days in September: 28 days
The month with the highest number of rainy days is August (30.8 days).
The month with the least rainy days is January (5.8 days).
Average daylight in September /
Average sunshine in September
Chapultepec, Mexico
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 13h and 18min).
The month with the shortest days is December (Average daylight: 11h and 0min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is March (Average sunshine: 9h and 42min).
The month with the least sunshine is November (Average sunshine: 8h and 6min).
Average sunshine days in September
Chapultepec, Mexico
- Average sunshine days in September: 1.1 days
The month with the most sunshine days is January (22.3 days).
The month with the least sunshine days is August (0.1 days).
Average UV index in September
Chapultepec, Mexico
- Average UV index in September: 3
The months with the highest UV index are March and April (UV index 5).
The months with the lowest UV index are September and October (UV index 3).
Average cloud cover in September
Chapultepec, Mexico
- Average cloud cover in September: 46
The month with the most cloud cover is September (Cloud cover 46).
The month with the least cloud cover is March (Cloud cover 12).
Average visibility in September
Chapultepec, Mexico
- Average visibility in September: 7km
The months with the highest visibility are January, February, March, April, May and December (10km).
The month with the lowest visibility is September (7km).
