September weather forecastGrootfontein, Namibia
September
Weather in September
Grootfontein welcomes spring in September. There's a noticeable rise in temperatures from the cooler August, signaling the end of the winter freeze. Rainfall continues to remain minimal. Grootfontein delights in an increased duration of sunshine and higher UV Index, indicating that the city is emerging from its colder periods. To sum up, September brings pleasant weather that hints at the upcoming summer.Temperature
With the transition into September, Grootfontein experiences a subtle uplift in average high-temperatures, adjusting from a moderately hot 27.1°C (80.8°F) in August to a hot 31°C (87.8°F). In September, the nighttime temperature plummets remarkably from the daily apex to a steady average of 13.8°C (56.8°F).Humidity
September is the least humid month, with an average relative humidity of 20%.Rainfall
Months with rainfall are January through May, September through December. September is the first month it rains. Throughout September, in the average 1.2 rainfall days, it receives 2mm (0.08") of precipitation. In Grootfontein, during the entire year, the rain falls for 120.9 days and collects up to 607mm (23.9") of precipitation.Daylight
In Grootfontein, the average length of the day in September is 11h and 59min.On the first day of September, sunrise is at 06:55 and sunset at 18:39. On the last day of the month, sunrise is at 06:29 and sunset at 18:45 CAT.
Sunshine
In September, the average sunshine is 9.9h.UV index
In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 6 during September translates into the following directions:
Prevent overexposure. Protection from the sun's harmful effects is needed. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Grootfontein, Namibia
- Average high temperature in September: 31°C
The warmest month (with the highest average high temperature) is October (32.8°C).
The month with the lowest average high temperature is July (22.6°C).
- Average low temperature in September: 13.8°C
The months with the highest average low temperature are November and December (20.5°C).
The coldest month (with the lowest average low temperature) is July (6.8°C).
Average pressure in September
Grootfontein, Namibia
- Average pressure in September: 1014.3mbar
The month with the highest atmospheric pressure is July (1020.5mbar).
The month with the lowest atmospheric pressure is January (1009.7mbar).
Average wind speed in September
Grootfontein, Namibia
- Average wind speed in September: 10.6km/h
The windiest month (with the highest average wind speed) is October (11km/h).
The calmest month (with the lowest average wind speed) is April (8.5km/h).
Average humidity in September
Grootfontein, Namibia
- Average humidity in September: 20%
The month with the highest relative humidity is March (62%).
The month with the lowest relative humidity is September (20%).
Average rainfall in September
Grootfontein, Namibia
- Average rainfall in September: 2mm
The wettest month (with the highest rainfall) is December (129mm).
The driest months (with the least rainfall) are June, July and August (0mm).
Average rainfall days in September
Grootfontein, Namibia
- Average rainfall days in September: 1.2 days
The month with the highest number of rainy days is December (22.2 days).
The months with the least rainy days are June and July (0 days).
Average daylight in September /
Average sunshine in September
Grootfontein, Namibia
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 18min).
The month with the shortest days is June (Average daylight: 11h and 0min).
- Average sunshine in September: 9h and 54min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The months with the least sunshine are January and February (Average sunshine: 9h and 12min).
Average sunshine days in September
Grootfontein, Namibia
- Average sunshine days in September: 28.5 days
The month with the most sunshine days is July (31 days).
The month with the least sunshine days is February (6.4 days).
Average UV index in September
Grootfontein, Namibia
- Average UV index in September: 6
The month with the highest UV index is October (UV index 7).
The months with the lowest UV index are May, June, July and August (UV index 5).
Average cloud cover in September
Grootfontein, Namibia
- Average cloud cover in September: 5
The months with the most cloud cover are February and March (Cloud cover 28).
The month with the least cloud cover is August (Cloud cover 1).
Average visibility in September
Grootfontein, Namibia
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
