September weather forecastOniipa, Namibia

September

Weather in September

With the arrival of September, Oniipa steps towards the summer season, where the mercury level begins to incline noticeably. The city goes from no rainfall in preceding months to negligible rainfall, registering only 7mm (0.28") over September. Despite the increase in temperatures, the humidity drops significantly, retaining the aridity in the climate. Wind speeds maintain a steadiness, somewhat offsetting the increasing heat.

Temperature

A subtle rise in the average high-temperature is observed during September, adjusting from a tropical 30.8°C (87.4°F) in August to a still hot 34.8°C (94.6°F). Oniipa demonstrates a significant disparity from daytime highs throughout the month of September, with an average nighttime temperature of 17.6°C (63.7°F).

Humidity

The least humid month is September, with an average relative humidity of 17%.

Rainfall

In Oniipa, rain does not fall in May through September.

Daylight

In Oniipa, the average length of the day in September is 12h and 0min.
On the first day of the month, sunrise is at 07:02 and sunset at 18:48. On the last day of September, sunrise is at 06:38 and sunset at 18:53 CAT.

Sunshine

August and September, with an average of 10h of sunshine, are months with the most sunshine.

UV index

The months with the highest UV index are January, September through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: A daily high UV index of 7 in September leads to these guidelines:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. A hat with a broad brim is indispensable, filtering out up to half of UV rays.

Updated: Jun 4, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The average high-temperature and low-temperature during September are 34.8°C (94.6°F) and 17.6°C (63.7°F) respectively. In April, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is appraised at 31°C (87.8°F).

September is the least humid month, with an average relative humidity of 17%.

In Oniipa, the average relative humidity in September is 17%.

May through September are months without rainfall.

In Oniipa, in September, it doesn't rain. In October, it rains.

In Oniipa, the average day length in September is 12h and 0min.

In September, on the first day of the month, sunrise is at 07:02 and sunset at 18:48. On the last day of the month, sunrise is at 06:38 and sunset at 18:53 CAT.

August and September, with an average of 10h of sunshine, are months with the most sunshine.

In Oniipa, the average sunshine duration in September is 10h.

The months with the highest UV index are January, September through December, with an average maximum UV index of 7.

In September, the average daily maximum UV index in Oniipa is 7. A UV Index estimate of 6 to 7 represents a high health risk from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

30.8°C

34.8°C

35.8°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

13.6km/h

13.7km/h

14km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

29.5

24.3

Average UV index

Average cloud cover

12%

Average visibility

10km

Average temperature in September
Oniipa, Namibia

Average high temperature in September: 34.8°C

The warmest month (with the highest average high temperature) is October (35.8°C).
The month with the lowest average high temperature is June (26.7°C).

Average low temperature in September: 17.6°C

The month with the highest average low temperature is December (23.3°C).
The coldest month (with the lowest average low temperature) is July (11.3°C).

Average pressure in September
Oniipa, Namibia

Average pressure in September: 1012.7mbar

The month with the highest atmospheric pressure is July (1018.7mbar).
The months with the lowest atmospheric pressure are January and December (1009.4mbar).

Average wind speed in September
Oniipa, Namibia

Average wind speed in September: 12.9km/h

The windiest month (with the highest average wind speed) is July (13.4km/h).
The calmest month (with the lowest average wind speed) is February (9.6km/h).

Average humidity in September
Oniipa, Namibia

Average humidity in September: 17%

The month with the highest relative humidity is March (55%).
The month with the lowest relative humidity is September (17%).

Average rainfall in September
Oniipa, Namibia

Average rainfall in September: 0mm

The wettest month (with the highest rainfall) is January (62mm).
The driest months (with the least rainfall) are May, June, July, August and September (0mm).

Average rainfall days in September
Oniipa, Namibia

Average rainfall days in September: 0.5 days

The month with the highest number of rainy days is March (17.5 days).
The months with the least rainy days are July and August (0 days).

Average daylight in September /
Average sunshine in September
Oniipa, Namibia

Average daylight in September: 12h and 0min

The month with the longest days is December (Average daylight: 13h and 12min).
The month with the shortest days is June (Average daylight: 11h and 6min).

Average sunshine in September: 10h and 0min

The months with the most sunshine are August and September (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 8h and 54min).

Average sunshine days in September
Oniipa, Namibia

Average sunshine days in September: 29.5 days

The months with the most sunshine days are July and August (31 days).
The month with the least sunshine days is February (11.2 days).

Average UV index in September
Oniipa, Namibia

Average UV index in September: 7

The months with the highest UV index are January, September, October, November and December (UV index 7).
The months with the lowest UV index are June and July (UV index 5).

Average cloud cover in September
Oniipa, Namibia

Average cloud cover in September: 4

The months with the most cloud cover are January, February and March (Cloud cover 28).
The month with the least cloud cover is August (Cloud cover 1).

Average visibility in September
Oniipa, Namibia

Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).