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
The arrival of September introduces a minor uplift in high-temperatures, adjusting from 24.8°C (76.6°F) in August to a still warm 28.9°C (84°F). Despite a significant daily temperature range, Derm's temperature falls to a steady low-temperature average of 13.6°C (56.5°F) in September.Humidity
The average relative humidity in September is 20%.Rainfall
January through June, September through December are months with rainfall in Derm. September is the first month it rains. Throughout September, in the average 1.2 rainfall days, it receives 1mm (0.04") of precipitation. Throughout the year, there are 38.2 rainfall days, and 98mm (3.86") of precipitation is accumulated.Daylight
In Derm, the average length of the day in September is 11h and 58min.On the first day of the month, sunrise is at 06:57 and sunset at 18:36. On the last day of September, sunrise is at 06:27 and sunset at 18:46 CAT.
Sunshine
In September, the average sunshine is 9.8h.UV index
In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the average person.Note: In September, a regular UV index of 6 translates into these guidelines:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. 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
Is it hot during September?
What is the average humidity in September in Derm?
When does it start raining?
How many hours of daylight does Derm have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Derm, Namibia
- Average high temperature in September: 28.9°C
The warmest months (with the highest average high temperature) are January and December (33.6°C).
The month with the lowest average high temperature is July (21.3°C).
- Average low temperature in September: 13.6°C
The month with the highest average low temperature is January (23.7°C).
The coldest month (with the lowest average low temperature) is July (8°C).
Average pressure in September
Derm, Namibia
- Average pressure in September: 1016.8mbar
The month with the highest atmospheric pressure is July (1022.2mbar).
The month with the lowest atmospheric pressure is January (1010mbar).
Average wind speed in September
Derm, Namibia
- Average wind speed in September: 14.6km/h
The windiest month (with the highest average wind speed) is October (15.4km/h).
The calmest month (with the lowest average wind speed) is March (13km/h).
Average humidity in September
Derm, Namibia
- Average humidity in September: 20%
The months with the highest relative humidity are February and April (34%).
The month with the lowest relative humidity is October (18%).
Average rainfall in September
Derm, Namibia
- Average rainfall in September: 1mm
The wettest month (with the highest rainfall) is February (28mm).
The driest months (with the least rainfall) are July and August (0mm).
Average rainfall days in September
Derm, Namibia
- Average rainfall days in September: 1.2 days
The month with the highest number of rainy days is February (8.8 days).
The month with the least rainy days is June (0.3 days).
Average daylight in September /
Average sunshine in September
Derm, Namibia
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 36min).
The month with the shortest days is June (Average daylight: 10h and 42min).
- Average sunshine in September: 9h and 5min
The month with the most sunshine is November (Average sunshine: 11h and 48min).
The month with the least sunshine is April (Average sunshine: 9h and 36min).
Average sunshine days in September
Derm, Namibia
- Average sunshine days in September: 28.4 days
The month with the most sunshine days is July (30.4 days).
The month with the least sunshine days is February (18.1 days).
Average UV index in September
Derm, Namibia
- Average UV index in September: 6
The months with the highest UV index are January, February, November and December (UV index 7).
The month with the lowest UV index is July (UV index 4).
Average cloud cover in September
Derm, Namibia
- Average cloud cover in September: 7
The month with the most cloud cover is February (Cloud cover 16).
The months with the least cloud cover are June, July and August (Cloud cover 3).
Average visibility in September
Derm, 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).
