September weather forecastMontero, Bolivia
September
Weather in September
September's weather in Montero is characterized by a steady climb in temperatures. Delayed rainfall combined with increased daylight hours and sunshine makes for extended clear skies. Although rainfall increases slightly to 25mm (0.98"), it is spread over a lesser number of days at 7.7. The reduced cloud cover of 23% makes way for bountiful sunshine that reaches a maximum of 9.7 hours.Temperature
The shift to September in Montero, Bolivia, signals an average high-temperature of a hot 31.9°C (89.4°F), subtly varied from August's 29°C (84.2°F). Despite drastic daily temperature oscillations, Montero cools down to an average low-temperature of 19.7°C (67.5°F) in September.Heat index
For September, the heat index is calculated to be a tropical 34°C (93.2°F). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.One should consider that heat index numbers are for shaded settings and light wind. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
Humidity
The least humid month in Montero is September, with an average relative humidity of 51%.Rainfall
In September, the rain falls for 7.7 days. Throughout September, 25mm (0.98") of precipitation is accumulated. In Montero, during the entire year, the rain falls for 196.4 days and collects up to 938mm (36.93") of precipitation.Daylight
In September, the average length of the day in Montero, Bolivia, is 12h and 1min.On the first day of September, sunrise is at 06:19 and sunset at 18:06. On the last day of the month, sunrise is at 05:55 and sunset at 18:10 -04.
Sunshine
The average sunshine in September is 9.7h.UV index
January, August through October, with an average maximum UV index of 7, are months with the highest UV index in Montero, Bolivia. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the average maximum UV index of 7 translates into the following recommendations:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Montero, Bolivia
- Average high temperature in September: 31.9°C
The warmest month (with the highest average high temperature) is October (32.5°C).
The month with the lowest average high temperature is June (24.9°C).
- Average low temperature in September: 19.7°C
The months with the highest average low temperature are February and December (21.9°C).
The coldest month (with the lowest average low temperature) is July (15.7°C).
Average pressure in September
Montero, Bolivia
- Average pressure in September: 1012mbar
The month with the highest atmospheric pressure is July (1015.3mbar).
The months with the lowest atmospheric pressure are November and December (1008.3mbar).
Average wind speed in September
Montero, Bolivia
- Average wind speed in September: 12.4km/h
The windiest month (with the highest average wind speed) is September (12.4km/h).
The calmest month (with the lowest average wind speed) is March (8.6km/h).
Average humidity in September
Montero, Bolivia
- Average humidity in September: 51%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is September (51%).
Average rainfall in September
Montero, Bolivia
- Average rainfall in September: 25mm
The wettest month (with the highest rainfall) is December (141mm).
The driest month (with the least rainfall) is August (19mm).
Average rainfall days in September
Montero, Bolivia
- Average rainfall days in September: 7.7 days
The month with the highest number of rainy days is January (24.5 days).
The month with the least rainy days is August (5.8 days).
Average daylight in September /
Average sunshine in September
Montero, Bolivia
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 6min).
The month with the shortest days is June (Average daylight: 11h and 6min).
- Average sunshine in September: 9h and 42min
The month with the most sunshine is October (Average sunshine: 10h and 36min).
The month with the least sunshine is May (Average sunshine: 5h and 30min).
Average sunshine days in September
Montero, Bolivia
- Average sunshine days in September: 20.5 days
The month with the most sunshine days is August (23.3 days).
The month with the least sunshine days is February (4.8 days).
Average UV index in September
Montero, Bolivia
- Average UV index in September: 7
The months with the highest UV index are January, August, September and October (UV index 7).
The month with the lowest UV index is May (UV index 5).
Average cloud cover in September
Montero, Bolivia
- Average cloud cover in September: 23
The month with the most cloud cover is February (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 23).
Average visibility in September
Montero, Bolivia
- Average visibility in September: 10km
The months with the highest visibility are August, September and October (10km).
The months with the lowest visibility are January, February, March, April and May (8km).





