September weather forecastRío Grande, Mexico
September
Weather in September
September, the first month of the autumn in Río Grande, is still a pleasant month, with an average temperature fluctuating between 22.2°C (72°F) and 11.8°C (53.2°F).Temperature
In September, Río Grande experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 23.9°C (75°F) in August to a pleasant 22.2°C (72°F). Río Grande experiences an average temperature drop to a fresh 11.8°C (53.2°F) during September nights.Humidity
The most humid month is September, with an average relative humidity of 72%.Rainfall
September is the month with the most rainfall in Río Grande. Rain falls for 21.5 days and accumulates 109mm (4.29") of precipitation.Snowfall
In Río Grande, snow does not fall in January, February, April through December.Daylight
The average length of the day in September in Río Grande is 12h and 17min.On the first day of the month, sunrise is at 6:34 am and sunset at 7:09 pm. On the last day of September, in Río Grande, sunrise is at 6:43 am and sunset at 6:39 pm CST.
Sunshine
September has the least sunshine of the year in Río Grande, with an average of 9h of sunshine.UV index
In Río Grande, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: During September, 5 as the daily maximum UV index converts into the following advice:
Act with care - The need to guard against sun damage is communicated. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Río Grande, Mexico
- Average high temperature in September: 22.2°C
The warmest month (with the highest average high temperature) is May (26.3°C).
The month with the lowest average high temperature is January (17.7°C).
- Average low temperature in September: 11.8°C
The month with the highest average low temperature is June (14.5°C).
The coldest month (with the lowest average low temperature) is January (4.2°C).
Average pressure in September
Río Grande, Mexico
- Average pressure in September: 1014.9mbar
The month with the highest atmospheric pressure is January (1018.1mbar).
The month with the lowest atmospheric pressure is June (1013.1mbar).
Average wind speed in September
Río Grande, Mexico
- Average wind speed in September: 9.5km/h
The windiest month (with the highest average wind speed) is April (14.3km/h).
The calmest month (with the lowest average wind speed) is October (9.1km/h).
Average humidity in September
Río Grande, Mexico
- Average humidity in September: 72%
The month with the highest relative humidity is September (72%).
The month with the lowest relative humidity is April (30%).
Average rainfall in September
Río Grande, Mexico
- Average rainfall in September: 109mm
The wettest month (with the highest rainfall) is September (109mm).
The driest month (with the least rainfall) is March (6mm).
Average rainfall days in September
Río Grande, Mexico
- Average rainfall days in September: 21.5 days
The month with the highest number of rainy days is September (21.5 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in September
Río Grande, Mexico
- Average snowfall in September: 0mm
The month with the highest snowfall is March (2mm).
The months with the least snowfall are January, February, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Río Grande, Mexico
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (0.2 days).
The months with the least snowfall days are February, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Río Grande, Mexico
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 13h and 36min).
The month with the shortest days is December (Average daylight: 10h and 42min).
- Average sunshine in September: 9h and 0min
The months with the most sunshine are February, May, June and November (Average sunshine: 9h and 36min).
The month with the least sunshine is September (Average sunshine: 9h and 0min).
Average sunshine days in September
Río Grande, Mexico
- Average sunshine days in September: 4.5 days
The months with the most sunshine days are March and December (26.2 days).
The month with the least sunshine days is September (4.5 days).
Average UV index in September
Río Grande, Mexico
- Average UV index in September: 5
The month with the highest UV index is May (UV index 6).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Río Grande, Mexico
- Average cloud cover in September: 33
The month with the most cloud cover is September (Cloud cover 33).
The months with the least cloud cover are March and April (Cloud cover 13).
Average visibility in September
Río Grande, Mexico
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, August, November and December (10km).
The months with the lowest visibility are July, September and October (9km).
