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
With the onset of September, the average high-temperature registers at a still warm 24.3°C (75.7°F), subtly different from August's 24.9°C (76.8°F). The average temperature during September nights is registered at a mild 15.5°C (59.9°F).Humidity
The months with the highest humidity are September and October, with an average relative humidity of 83%.Rainfall
In September, the rain falls for 27.4 days. Throughout September, 133mm (5.24") of precipitation is accumulated. Throughout the year, there are 241.2 rainfall days, and 1050mm (41.34") of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 14min.On the first day of September, sunrise is at 6:13 am and sunset at 6:42 pm. On the last day of the month, sunrise is at 6:18 am and sunset at 6:17 pm CST.
Sunshine
In September, the average sunshine is 8.5h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: The UV index of 5 during September translates into the following guidance:
Be vigilant - Preventing sunburn is recommended. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. 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 average September temperature?
What is the most humid month?
What is the average humidity in September?
How many days does it rain in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Sumidero, Mexico
- Average high temperature in September: 24.3°C
The warmest month (with the highest average high temperature) is April (27.2°C).
The month with the lowest average high temperature is January (19.8°C).
- Average low temperature in September: 15.5°C
The month with the highest average low temperature is May (16.8°C).
The coldest month (with the lowest average low temperature) is January (10.7°C).
Average pressure in September
Sumidero, Mexico
- Average pressure in September: 1014.5mbar
The month with the highest atmospheric pressure is January (1019.2mbar).
The month with the lowest atmospheric pressure is May (1013.6mbar).
Average wind speed in September
Sumidero, Mexico
- Average wind speed in September: 5.6km/h
The windiest month (with the highest average wind speed) is April (7.3km/h).
The calmest month (with the lowest average wind speed) is September (5.6km/h).
Average humidity in September
Sumidero, Mexico
- Average humidity in September: 83%
The months with the highest relative humidity are September and October (83%).
The month with the lowest relative humidity is April (68%).
Average rainfall in September
Sumidero, Mexico
- Average rainfall in September: 133mm
The wettest month (with the highest rainfall) is June (185mm).
The driest month (with the least rainfall) is December (15mm).
Average rainfall days in September
Sumidero, Mexico
- Average rainfall days in September: 27.4 days
The month with the highest number of rainy days is August (27.7 days).
The month with the least rainy days is December (11.3 days).
Average daylight in September /
Average sunshine in September
Sumidero, 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 3min
The month with the most sunshine is May (Average sunshine: 10h and 48min).
The month with the least sunshine is November (Average sunshine: 6h and 48min).
Average sunshine days in September
Sumidero, Mexico
- Average sunshine days in September: 1 days
The month with the most sunshine days is January (14.9 days).
The months with the least sunshine days are August and September (1 days).
Average UV index in September
Sumidero, Mexico
- Average UV index in September: 5
The months with the highest UV index are April and May (UV index 6).
The month with the lowest UV index is January (UV index 4).
Average cloud cover in September
Sumidero, Mexico
- Average cloud cover in September: 38
The month with the most cloud cover is September (Cloud cover 38).
The month with the least cloud cover is April (Cloud cover 25).
Average visibility in September
Sumidero, Mexico
- Average visibility in September: 8km
The months with the highest visibility are February, March, April, May, June, July and August (9km).
The months with the lowest visibility are January, September, October, November and December (8km).
